--- /dev/null
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * COPYING NOTES
+ *
+ * timeout.c -- a timeout handler for shell commands
+ *
+ * Copyright (C) 2005-6, Roberto A. Foglietta <me@roberto.foglietta.name>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
+ */
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * REVISION NOTES:
+ * released 17-11-2005 by Roberto A. Foglietta
+ * talarm 04-12-2005 by Roberto A. Foglietta
+ * modified 05-12-2005 by Roberto A. Foglietta
+ * sizerdct 06-12-2005 by Roberto A. Foglietta
+ * splitszf 12-05-2006 by Roberto A. Foglietta
+ * rewrite 14-11-2008 vda
+ */
+//config:config TIMEOUT
+//config: bool "timeout"
+//config: default y
+//config: help
+//config: Runs a program and watches it. If it does not terminate in
+//config: specified number of seconds, it is sent a signal.
+
+//applet:IF_TIMEOUT(APPLET(timeout, BB_DIR_USR_BIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_TIMEOUT) += timeout.o
+
+//usage:#define timeout_trivial_usage
+//usage: "[-t SECS] [-s SIG] PROG ARGS"
+//usage:#define timeout_full_usage "\n\n"
+//usage: "Runs PROG. Sends SIG to it if it is not gone in SECS seconds.\n"
+//usage: "Defaults: SECS: 10, SIG: TERM."
+
+#include "libbb.h"
+
+int timeout_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int timeout_main(int argc UNUSED_PARAM, char **argv)
+{
+ int signo;
+ int status;
+ int parent = 0;
+ int timeout = 10;
+ pid_t pid;
+#if !BB_MMU
+ char *sv1, *sv2;
+#endif
+ const char *opt_s = "TERM";
+
+ /* -p option is not documented, it is needed to support NOMMU. */
+
+ /* -t SECONDS; -p PARENT_PID */
+ /* '+': stop at first non-option */
+ getopt32(argv, "+s:t:+" USE_FOR_NOMMU("p:+"), &opt_s, &timeout, &parent);
+ /*argv += optind; - no, wait for bb_daemonize_or_rexec! */
+ signo = get_signum(opt_s);
+ if (signo < 0)
+ bb_error_msg_and_die("unknown signal '%s'", opt_s);
+
+ /* We want to create a grandchild which will watch
+ * and kill the grandparent. Other methods:
+ * making parent watch child disrupts parent<->child link
+ * (example: "tcpsvd 0.0.0.0 1234 timeout service_prog" -
+ * it's better if service_prog is a child of tcpsvd!),
+ * making child watch parent results in programs having
+ * unexpected children. */
+
+ if (parent) /* we were re-execed, already grandchild */
+ goto grandchild;
+ if (!argv[optind]) /* no PROG? */
+ bb_show_usage();
+
+#if !BB_MMU
+ sv1 = argv[optind];
+ sv2 = argv[optind + 1];
+#endif
+ pid = xvfork();
+ if (pid == 0) {
+ /* Child: spawn grandchild and exit */
+ parent = getppid();
+#if !BB_MMU
+ argv[optind] = xasprintf("-p%u", parent);
+ argv[optind + 1] = NULL;
+#endif
+ /* NB: exits with nonzero on error: */
+ bb_daemonize_or_rexec(0, argv);
+ /* Here we are grandchild. Sleep, then kill grandparent */
+ grandchild:
+ /* Just sleep(HUGE_NUM); kill(parent) may kill wrong process! */
+ while (1) {
+ sleep(1);
+ if (--timeout <= 0)
+ break;
+ if (kill(parent, 0)) {
+ /* process is gone */
+ return EXIT_SUCCESS;
+ }
+ }
+ kill(parent, signo);
+ return EXIT_SUCCESS;
+ }
+
+ /* Parent */
+ wait(&status); /* wait for child to die */
+ /* Did intermediate [v]fork or exec fail? */
+ if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
+ return EXIT_FAILURE;
+ /* Ok, exec a program as requested */
+ argv += optind;
+#if !BB_MMU
+ argv[0] = sv1;
+ argv[1] = sv2;
+#endif
+ BB_EXECVP_or_die(argv);
+}
+++ /dev/null
-/* vi: set sw=4 ts=4: */
-/*
- * chrt - manipulate real-time attributes of a process
- * Copyright (c) 2006-2007 Bernhard Reutner-Fischer
- *
- * Licensed under GPLv2 or later, see file LICENSE in this source tree.
- */
-//config:config CHRT
-//config: bool "chrt"
-//config: default y
-//config: help
-//config: manipulate real-time attributes of a process.
-//config: This requires sched_{g,s}etparam support in your libc.
-
-//applet:IF_CHRT(APPLET(chrt, BB_DIR_USR_BIN, BB_SUID_DROP))
-
-//kbuild:lib-$(CONFIG_CHRT) += chrt.o
-
-//usage:#define chrt_trivial_usage
-//usage: "[-prfom] [PRIO] [PID | PROG ARGS]"
-//usage:#define chrt_full_usage "\n\n"
-//usage: "Change scheduling priority and class for a process\n"
-//usage: "\n -p Operate on PID"
-//usage: "\n -r Set SCHED_RR class"
-//usage: "\n -f Set SCHED_FIFO class"
-//usage: "\n -o Set SCHED_OTHER class"
-//usage: "\n -m Show min/max priorities"
-//usage:
-//usage:#define chrt_example_usage
-//usage: "$ chrt -r 4 sleep 900; x=$!\n"
-//usage: "$ chrt -f -p 3 $x\n"
-//usage: "You need CAP_SYS_NICE privileges to set scheduling attributes of a process"
-
-#include <sched.h>
-#include "libbb.h"
-
-static const struct {
- int policy;
- char name[sizeof("SCHED_OTHER")];
-} policies[] = {
- {SCHED_OTHER, "SCHED_OTHER"},
- {SCHED_FIFO, "SCHED_FIFO"},
- {SCHED_RR, "SCHED_RR"}
-};
-
-//TODO: add
-// -b, SCHED_BATCH
-// -i, SCHED_IDLE
-
-static void show_min_max(int pol)
-{
- const char *fmt = "%s min/max priority\t: %u/%u\n";
- int max, min;
-
- max = sched_get_priority_max(pol);
- min = sched_get_priority_min(pol);
- if ((max|min) < 0)
- fmt = "%s not supported\n";
- printf(fmt, policies[pol].name, min, max);
-}
-
-#define OPT_m (1<<0)
-#define OPT_p (1<<1)
-#define OPT_r (1<<2)
-#define OPT_f (1<<3)
-#define OPT_o (1<<4)
-
-int chrt_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int chrt_main(int argc UNUSED_PARAM, char **argv)
-{
- pid_t pid = 0;
- unsigned opt;
- struct sched_param sp;
- char *pid_str;
- char *priority = priority; /* for compiler */
- const char *current_new;
- int policy = SCHED_RR;
-
- /* only one policy accepted */
- opt_complementary = "r--fo:f--ro:o--rf";
- opt = getopt32(argv, "+mprfo");
- if (opt & OPT_m) { /* print min/max and exit */
- show_min_max(SCHED_FIFO);
- show_min_max(SCHED_RR);
- show_min_max(SCHED_OTHER);
- fflush_stdout_and_exit(EXIT_SUCCESS);
- }
- if (opt & OPT_r)
- policy = SCHED_RR;
- if (opt & OPT_f)
- policy = SCHED_FIFO;
- if (opt & OPT_o)
- policy = SCHED_OTHER;
-
- argv += optind;
- if (!argv[0])
- bb_show_usage();
- if (opt & OPT_p) {
- pid_str = *argv++;
- if (*argv) { /* "-p <priority> <pid> [...]" */
- priority = pid_str;
- pid_str = *argv;
- }
- /* else "-p <pid>", and *argv == NULL */
- pid = xatoul_range(pid_str, 1, ((unsigned)(pid_t)ULONG_MAX) >> 1);
- } else {
- priority = *argv++;
- if (!*argv)
- bb_show_usage();
- }
-
- current_new = "current\0new";
- if (opt & OPT_p) {
- int pol;
- print_rt_info:
- pol = sched_getscheduler(pid);
- if (pol < 0)
- bb_perror_msg_and_die("can't %cet pid %d's policy", 'g', (int)pid);
- printf("pid %d's %s scheduling policy: %s\n",
- pid, current_new, policies[pol].name);
- if (sched_getparam(pid, &sp))
- bb_perror_msg_and_die("can't get pid %d's attributes", (int)pid);
- printf("pid %d's %s scheduling priority: %d\n",
- (int)pid, current_new, sp.sched_priority);
- if (!*argv) {
- /* Either it was just "-p <pid>",
- * or it was "-p <priority> <pid>" and we came here
- * for the second time (see goto below) */
- return EXIT_SUCCESS;
- }
- *argv = NULL;
- current_new += 8;
- }
-
- /* from the manpage of sched_getscheduler:
- [...] sched_priority can have a value in the range 0 to 99.
- [...] SCHED_OTHER or SCHED_BATCH must be assigned static priority 0.
- [...] SCHED_FIFO or SCHED_RR can have static priority in 1..99 range.
- */
- sp.sched_priority = xstrtou_range(priority, 0, policy != SCHED_OTHER ? 1 : 0, 99);
-
- if (sched_setscheduler(pid, policy, &sp) < 0)
- bb_perror_msg_and_die("can't %cet pid %d's policy", 's', (int)pid);
-
- if (!argv[0]) /* "-p <priority> <pid> [...]" */
- goto print_rt_info;
-
- BB_EXECVP_or_die(argv);
-}
+++ /dev/null
-/* vi: set sw=4 ts=4: */
-/*
- * eject implementation for busybox
- *
- * Copyright (C) 2004 Peter Willis <psyphreak@phreaker.net>
- * Copyright (C) 2005 Tito Ragusa <farmatito@tiscali.it>
- *
- * Licensed under GPLv2 or later, see file LICENSE in this source tree.
- */
-
-/*
- * This is a simple hack of eject based on something Erik posted in #uclibc.
- * Most of the dirty work blatantly ripped off from cat.c =)
- */
-//config:config EJECT
-//config: bool "eject"
-//config: default y
-//config: select PLATFORM_LINUX
-//config: help
-//config: Used to eject cdroms. (defaults to /dev/cdrom)
-//config:
-//config:config FEATURE_EJECT_SCSI
-//config: bool "SCSI support"
-//config: default y
-//config: depends on EJECT
-//config: help
-//config: Add the -s option to eject, this allows to eject SCSI-Devices and
-//config: usb-storage devices.
-
-//applet:IF_EJECT(APPLET(eject, BB_DIR_USR_BIN, BB_SUID_DROP))
-
-//kbuild:lib-$(CONFIG_EJECT) += eject.o
-
-//usage:#define eject_trivial_usage
-//usage: "[-t] [-T] [DEVICE]"
-//usage:#define eject_full_usage "\n\n"
-//usage: "Eject DEVICE or default /dev/cdrom\n"
-//usage: IF_FEATURE_EJECT_SCSI(
-//usage: "\n -s SCSI device"
-//usage: )
-//usage: "\n -t Close tray"
-//usage: "\n -T Open/close tray (toggle)"
-
-#include <sys/mount.h>
-#include "libbb.h"
-#if ENABLE_FEATURE_EJECT_SCSI
-/* Must be after libbb.h: they need size_t */
-# include "fix_u32.h"
-# include <scsi/sg.h>
-# include <scsi/scsi.h>
-#endif
-
-#define dev_fd 3
-
-/* Code taken from the original eject (http://eject.sourceforge.net/),
- * refactored it a bit for busybox (ne-bb@nicoerfurth.de) */
-
-#if ENABLE_FEATURE_EJECT_SCSI
-static void eject_scsi(const char *dev)
-{
- static const char sg_commands[3][6] ALIGN1 = {
- { ALLOW_MEDIUM_REMOVAL, 0, 0, 0, 0, 0 },
- { START_STOP, 0, 0, 0, 1, 0 },
- { START_STOP, 0, 0, 0, 2, 0 }
- };
-
- unsigned i;
- unsigned char sense_buffer[32];
- unsigned char inqBuff[2];
- sg_io_hdr_t io_hdr;
-
- if ((ioctl(dev_fd, SG_GET_VERSION_NUM, &i) < 0) || (i < 30000))
- bb_error_msg_and_die("not a sg device or old sg driver");
-
- memset(&io_hdr, 0, sizeof(sg_io_hdr_t));
- io_hdr.interface_id = 'S';
- io_hdr.cmd_len = 6;
- io_hdr.mx_sb_len = sizeof(sense_buffer);
- io_hdr.dxfer_direction = SG_DXFER_NONE;
- /* io_hdr.dxfer_len = 0; */
- io_hdr.dxferp = inqBuff;
- io_hdr.sbp = sense_buffer;
- io_hdr.timeout = 2000;
-
- for (i = 0; i < 3; i++) {
- io_hdr.cmdp = (void *)sg_commands[i];
- ioctl_or_perror_and_die(dev_fd, SG_IO, (void *)&io_hdr, "%s", dev);
- }
-
- /* force kernel to reread partition table when new disc is inserted */
- ioctl(dev_fd, BLKRRPART);
-}
-#else
-# define eject_scsi(dev) ((void)0)
-#endif
-
-/* various defines swiped from linux/cdrom.h */
-#define CDROMCLOSETRAY 0x5319 /* pendant of CDROMEJECT */
-#define CDROMEJECT 0x5309 /* Ejects the cdrom media */
-#define CDROM_DRIVE_STATUS 0x5326 /* Get tray position, etc. */
-/* drive status possibilities returned by CDROM_DRIVE_STATUS ioctl */
-#define CDS_TRAY_OPEN 2
-
-#define FLAG_CLOSE 1
-#define FLAG_SMART 2
-#define FLAG_SCSI 4
-
-static void eject_cdrom(unsigned flags, const char *dev)
-{
- int cmd = CDROMEJECT;
-
- if (flags & FLAG_CLOSE
- || ((flags & FLAG_SMART) && ioctl(dev_fd, CDROM_DRIVE_STATUS) == CDS_TRAY_OPEN)
- ) {
- cmd = CDROMCLOSETRAY;
- }
-
- ioctl_or_perror_and_die(dev_fd, cmd, NULL, "%s", dev);
-}
-
-int eject_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int eject_main(int argc UNUSED_PARAM, char **argv)
-{
- unsigned flags;
- const char *device;
-
- opt_complementary = "?1:t--T:T--t";
- flags = getopt32(argv, "tT" IF_FEATURE_EJECT_SCSI("s"));
- device = argv[optind] ? argv[optind] : "/dev/cdrom";
-
- /* We used to do "umount <device>" here, but it was buggy
- if something was mounted OVER cdrom and
- if cdrom is mounted many times.
-
- This works equally well (or better):
- #!/bin/sh
- umount /dev/cdrom
- eject /dev/cdrom
- */
-
- xmove_fd(xopen_nonblocking(device), dev_fd);
-
- if (ENABLE_FEATURE_EJECT_SCSI && (flags & FLAG_SCSI))
- eject_scsi(device);
- else
- eject_cdrom(flags, device);
-
- if (ENABLE_FEATURE_CLEAN_UP)
- close(dev_fd);
-
- return EXIT_SUCCESS;
-}
+++ /dev/null
-/* vi: set sw=4 ts=4: */
-/*
- * ionice implementation for busybox based on linux-utils-ng 2.14
- *
- * Copyright (C) 2008 by <u173034@informatik.uni-oldenburg.de>
- *
- * Licensed under GPLv2 or later, see file LICENSE in this source tree.
- */
-//config:config IONICE
-//config: bool "ionice"
-//config: default y
-//config: select PLATFORM_LINUX
-//config: help
-//config: Set/set program io scheduling class and priority
-//config: Requires kernel >= 2.6.13
-
-//applet:IF_IONICE(APPLET(ionice, BB_DIR_BIN, BB_SUID_DROP))
-
-//kbuild:lib-$(CONFIG_IONICE) += ionice.o
-
-//usage:#define ionice_trivial_usage
-//usage: "[-c 1-3] [-n 0-7] [-p PID] [PROG]"
-//usage:#define ionice_full_usage "\n\n"
-//usage: "Change I/O priority and class\n"
-//usage: "\n -c Class. 1:realtime 2:best-effort 3:idle"
-//usage: "\n -n Priority"
-
-#include <sys/syscall.h>
-#include <asm/unistd.h>
-#include "libbb.h"
-
-static int ioprio_set(int which, int who, int ioprio)
-{
- return syscall(SYS_ioprio_set, which, who, ioprio);
-}
-
-static int ioprio_get(int which, int who)
-{
- return syscall(SYS_ioprio_get, which, who);
-}
-
-enum {
- IOPRIO_WHO_PROCESS = 1,
- IOPRIO_WHO_PGRP,
- IOPRIO_WHO_USER
-};
-
-enum {
- IOPRIO_CLASS_NONE,
- IOPRIO_CLASS_RT,
- IOPRIO_CLASS_BE,
- IOPRIO_CLASS_IDLE
-};
-
-static const char to_prio[] ALIGN1 = "none\0realtime\0best-effort\0idle";
-
-#define IOPRIO_CLASS_SHIFT 13
-
-int ionice_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int ionice_main(int argc UNUSED_PARAM, char **argv)
-{
- /* Defaults */
- int ioclass = 0;
- int pri = 0;
- int pid = 0; /* affect own porcess */
- int opt;
- enum {
- OPT_n = 1,
- OPT_c = 2,
- OPT_p = 4,
- };
-
- /* Numeric params */
- /* '+': stop at first non-option */
- opt = getopt32(argv, "+n:+c:+p:+", &pri, &ioclass, &pid);
- argv += optind;
-
- if (opt & OPT_c) {
- if (ioclass > 3)
- bb_error_msg_and_die("bad class %d", ioclass);
-// Do we need this (compat?)?
-// if (ioclass == IOPRIO_CLASS_NONE)
-// ioclass = IOPRIO_CLASS_BE;
-// if (ioclass == IOPRIO_CLASS_IDLE) {
-// //if (opt & OPT_n)
-// // bb_error_msg("ignoring priority for idle class");
-// pri = 7;
-// }
- }
-
- if (!(opt & (OPT_n|OPT_c))) {
- if (!(opt & OPT_p) && *argv)
- pid = xatoi_positive(*argv);
-
- pri = ioprio_get(IOPRIO_WHO_PROCESS, pid);
- if (pri == -1)
- bb_perror_msg_and_die("ioprio_%cet", 'g');
-
- ioclass = (pri >> IOPRIO_CLASS_SHIFT) & 0x3;
- pri &= 0xff;
- printf((ioclass == IOPRIO_CLASS_IDLE) ? "%s\n" : "%s: prio %d\n",
- nth_string(to_prio, ioclass), pri);
- } else {
-//printf("pri=%d class=%d val=%x\n",
-//pri, ioclass, pri | (ioclass << IOPRIO_CLASS_SHIFT));
- pri |= (ioclass << IOPRIO_CLASS_SHIFT);
- if (ioprio_set(IOPRIO_WHO_PROCESS, pid, pri) == -1)
- bb_perror_msg_and_die("ioprio_%cet", 's');
- if (argv[0]) {
- BB_EXECVP_or_die(argv);
- }
- }
-
- return EXIT_SUCCESS;
-}
+++ /dev/null
-/* vi: set sw=4 ts=4: */
-/*
- * last implementation for busybox
- *
- * Copyright (C) 2003-2004 by Erik Andersen <andersen@codepoet.org>
- *
- * Licensed under GPLv2, see file LICENSE in this source tree.
- */
-//config:config LAST
-//config: bool "last"
-//config: default y
-//config: depends on FEATURE_WTMP
-//config: help
-//config: 'last' displays a list of the last users that logged into the system.
-//config:
-//config:config FEATURE_LAST_FANCY
-//config: bool "Output extra information"
-//config: default y
-//config: depends on LAST
-//config: help
-//config: 'last' displays detailed information about the last users that
-//config: logged into the system (mimics sysvinit last). +900 bytes.
-
-//applet:IF_LAST(APPLET(last, BB_DIR_USR_BIN, BB_SUID_DROP))
-
-//kbuild:ifeq ($(CONFIG_FEATURE_LAST_FANCY),y)
-//kbuild:lib-$(CONFIG_FEATURE_LAST_FANCY) += last_fancy.o
-//kbuild:else
-//kbuild:lib-$(CONFIG_LAST) += last.o
-//kbuild:endif
-
-//usage:#define last_trivial_usage
-//usage: ""IF_FEATURE_LAST_FANCY("[-HW] [-f FILE]")
-//usage:#define last_full_usage "\n\n"
-//usage: "Show listing of the last users that logged into the system"
-//usage: IF_FEATURE_LAST_FANCY( "\n"
-/* //usage: "\n -H Show header line" */
-//usage: "\n -W Display with no host column truncation"
-//usage: "\n -f FILE Read from FILE instead of /var/log/wtmp"
-//usage: )
-
-#include "libbb.h"
-
-/* NB: ut_name and ut_user are the same field, use only one name (ut_user)
- * to reduce confusion */
-
-#ifndef SHUTDOWN_TIME
-# define SHUTDOWN_TIME 254
-#endif
-
-/* Grr... utmp char[] members do not have to be nul-terminated.
- * Do what we can while still keeping this reasonably small.
- * Note: We are assuming the ut_id[] size is fixed at 4. */
-
-#if defined UT_LINESIZE \
- && ((UT_LINESIZE != 32) || (UT_NAMESIZE != 32) || (UT_HOSTSIZE != 256))
-#error struct utmpx member char[] size(s) have changed!
-#elif defined __UT_LINESIZE \
- && ((__UT_LINESIZE != 32) || (__UT_NAMESIZE != 32) || (__UT_HOSTSIZE != 256))
-/* __UT_NAMESIZE was checked with 64 above, but glibc-2.11 definitely uses 32! */
-#error struct utmpx member char[] size(s) have changed!
-#endif
-
-#if EMPTY != 0 || RUN_LVL != 1 || BOOT_TIME != 2 || NEW_TIME != 3 || \
- OLD_TIME != 4
-#error Values for the ut_type field of struct utmpx changed
-#endif
-
-int last_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int last_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
-{
- struct utmpx ut;
- int n, file = STDIN_FILENO;
- time_t t_tmp;
- off_t pos;
- static const char _ut_usr[] ALIGN1 =
- "runlevel\0" "reboot\0" "shutdown\0";
- static const char _ut_lin[] ALIGN1 =
- "~\0" "{\0" "|\0" /* "LOGIN\0" "date\0" */;
- enum {
- TYPE_RUN_LVL = RUN_LVL, /* 1 */
- TYPE_BOOT_TIME = BOOT_TIME, /* 2 */
- TYPE_SHUTDOWN_TIME = SHUTDOWN_TIME
- };
- enum {
- _TILDE = EMPTY, /* 0 */
- TYPE_NEW_TIME, /* NEW_TIME, 3 */
- TYPE_OLD_TIME /* OLD_TIME, 4 */
- };
-
- if (argv[1]) {
- bb_show_usage();
- }
- file = xopen(bb_path_wtmp_file, O_RDONLY);
-
- printf("%-10s %-14s %-18s %-12.12s %s\n",
- "USER", "TTY", "HOST", "LOGIN", "TIME");
- /* yikes. We reverse over the file and that is a not too elegant way */
- pos = xlseek(file, 0, SEEK_END);
- pos = lseek(file, pos - sizeof(ut), SEEK_SET);
- while ((n = full_read(file, &ut, sizeof(ut))) > 0) {
- if (n != sizeof(ut)) {
- bb_perror_msg_and_die("short read");
- }
- n = index_in_strings(_ut_lin, ut.ut_line);
- if (n == _TILDE) { /* '~' */
-#if 1
-/* do we really need to be cautious here? */
- n = index_in_strings(_ut_usr, ut.ut_user);
- if (++n > 0)
- ut.ut_type = n != 3 ? n : SHUTDOWN_TIME;
-#else
- if (is_prefixed_with(ut.ut_user, "shutdown"))
- ut.ut_type = SHUTDOWN_TIME;
- else if (is_prefixed_with(ut.ut_user, "reboot"))
- ut.ut_type = BOOT_TIME;
- else if (is_prefixed_with(ut.ut_user, "runlevel"))
- ut.ut_type = RUN_LVL;
-#endif
- } else {
- if (ut.ut_user[0] == '\0' || strcmp(ut.ut_user, "LOGIN") == 0) {
- /* Don't bother. This means we can't find how long
- * someone was logged in for. Oh well. */
- goto next;
- }
- if (ut.ut_type != DEAD_PROCESS
- && ut.ut_user[0]
- && ut.ut_line[0]
- ) {
- ut.ut_type = USER_PROCESS;
- }
- if (strcmp(ut.ut_user, "date") == 0) {
- if (n == TYPE_OLD_TIME) { /* '|' */
- ut.ut_type = OLD_TIME;
- }
- if (n == TYPE_NEW_TIME) { /* '{' */
- ut.ut_type = NEW_TIME;
- }
- }
- }
-
- if (ut.ut_type != USER_PROCESS) {
- switch (ut.ut_type) {
- case OLD_TIME:
- case NEW_TIME:
- case RUN_LVL:
- case SHUTDOWN_TIME:
- goto next;
- case BOOT_TIME:
- strcpy(ut.ut_line, "system boot");
- }
- }
- /* manpages say ut_tv.tv_sec *is* time_t,
- * but some systems have it wrong */
- t_tmp = (time_t)ut.ut_tv.tv_sec;
- printf("%-10s %-14s %-18s %-12.12s\n",
- ut.ut_user, ut.ut_line, ut.ut_host, ctime(&t_tmp) + 4);
- next:
- pos -= sizeof(ut);
- if (pos <= 0)
- break; /* done. */
- xlseek(file, pos, SEEK_SET);
- }
-
- fflush_stdout_and_exit(EXIT_SUCCESS);
-}
+++ /dev/null
-/* vi: set sw=4 ts=4: */
-/*
- * (sysvinit like) last implementation
- *
- * Copyright (C) 2008 by Patricia Muscalu <patricia.muscalu@axis.com>
- *
- * Licensed under GPLv2 or later, see file LICENSE in this source tree.
- */
-
-#include "libbb.h"
-
-/* NB: ut_name and ut_user are the same field, use only one name (ut_user)
- * to reduce confusion */
-
-#ifndef SHUTDOWN_TIME
-# define SHUTDOWN_TIME 254
-#endif
-
-#define HEADER_FORMAT "%-8.8s %-12.12s %-*.*s %-16.16s %-7.7s %s\n"
-#define HEADER_LINE "USER", "TTY", \
- INET_ADDRSTRLEN, INET_ADDRSTRLEN, "HOST", "LOGIN", " TIME", ""
-#define HEADER_LINE_WIDE "USER", "TTY", \
- INET6_ADDRSTRLEN, INET6_ADDRSTRLEN, "HOST", "LOGIN", " TIME", ""
-
-#if !defined __UT_LINESIZE && defined UT_LINESIZE
-# define __UT_LINESIZE UT_LINESIZE
-#endif
-
-enum {
- NORMAL,
- LOGGED,
- DOWN,
- REBOOT,
- CRASH,
- GONE
-};
-
-enum {
- LAST_OPT_W = (1 << 0), /* -W wide */
- LAST_OPT_f = (1 << 1), /* -f input file */
- LAST_OPT_H = (1 << 2), /* -H header */
-};
-
-#define show_wide (option_mask32 & LAST_OPT_W)
-
-static void show_entry(struct utmpx *ut, int state, time_t dur_secs)
-{
- unsigned days, hours, mins;
- char duration[sizeof("(%u+02:02)") + sizeof(int)*3];
- char login_time[17];
- char logout_time[8];
- const char *logout_str;
- const char *duration_str;
- time_t tmp;
-
- /* manpages say ut_tv.tv_sec *is* time_t,
- * but some systems have it wrong */
- tmp = ut->ut_tv.tv_sec;
- safe_strncpy(login_time, ctime(&tmp), 17);
- tmp = dur_secs;
- snprintf(logout_time, 8, "- %s", ctime(&tmp) + 11);
-
- dur_secs = MAX(dur_secs - (time_t)ut->ut_tv.tv_sec, (time_t)0);
- /* unsigned int is easier to divide than time_t (which may be signed long) */
- mins = dur_secs / 60;
- days = mins / (24*60);
- mins = mins % (24*60);
- hours = mins / 60;
- mins = mins % 60;
-
-// if (days) {
- sprintf(duration, "(%u+%02u:%02u)", days, hours, mins);
-// } else {
-// sprintf(duration, " (%02u:%02u)", hours, mins);
-// }
-
- logout_str = logout_time;
- duration_str = duration;
- switch (state) {
- case NORMAL:
- break;
- case LOGGED:
- logout_str = " still";
- duration_str = "logged in";
- break;
- case DOWN:
- logout_str = "- down ";
- break;
- case REBOOT:
- break;
- case CRASH:
- logout_str = "- crash";
- break;
- case GONE:
- logout_str = " gone";
- duration_str = "- no logout";
- break;
- }
-
- printf(HEADER_FORMAT,
- ut->ut_user,
- ut->ut_line,
- show_wide ? INET6_ADDRSTRLEN : INET_ADDRSTRLEN,
- show_wide ? INET6_ADDRSTRLEN : INET_ADDRSTRLEN,
- ut->ut_host,
- login_time,
- logout_str,
- duration_str);
-}
-
-static int get_ut_type(struct utmpx *ut)
-{
- if (ut->ut_line[0] == '~') {
- if (strcmp(ut->ut_user, "shutdown") == 0) {
- return SHUTDOWN_TIME;
- }
- if (strcmp(ut->ut_user, "reboot") == 0) {
- return BOOT_TIME;
- }
- if (strcmp(ut->ut_user, "runlevel") == 0) {
- return RUN_LVL;
- }
- return ut->ut_type;
- }
-
- if (ut->ut_user[0] == 0) {
- return DEAD_PROCESS;
- }
-
- if ((ut->ut_type != DEAD_PROCESS)
- && (strcmp(ut->ut_user, "LOGIN") != 0)
- && ut->ut_user[0]
- && ut->ut_line[0]
- ) {
- ut->ut_type = USER_PROCESS;
- }
-
- if (strcmp(ut->ut_user, "date") == 0) {
- if (ut->ut_line[0] == '|') {
- return OLD_TIME;
- }
- if (ut->ut_line[0] == '{') {
- return NEW_TIME;
- }
- }
- return ut->ut_type;
-}
-
-static int is_runlevel_shutdown(struct utmpx *ut)
-{
- if (((ut->ut_pid & 255) == '0') || ((ut->ut_pid & 255) == '6')) {
- return 1;
- }
-
- return 0;
-}
-
-int last_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int last_main(int argc UNUSED_PARAM, char **argv)
-{
- struct utmpx ut;
- const char *filename = _PATH_WTMP;
- llist_t *zlist;
- off_t pos;
- time_t start_time;
- time_t boot_time;
- time_t down_time;
- int file;
- smallint going_down;
- smallint boot_down;
-
- /*opt =*/ getopt32(argv, "Wf:" /* "H" */, &filename);
-#ifdef BUT_UTIL_LINUX_LAST_HAS_NO_SUCH_OPT
- if (opt & LAST_OPT_H) {
- /* Print header line */
- if (opt & LAST_OPT_W) {
- printf(HEADER_FORMAT, HEADER_LINE_WIDE);
- } else {
- printf(HEADER_FORMAT, HEADER_LINE);
- }
- }
-#endif
-
- file = xopen(filename, O_RDONLY);
- {
- /* in case the file is empty... */
- struct stat st;
- fstat(file, &st);
- start_time = st.st_ctime;
- }
-
- time(&down_time);
- going_down = 0;
- boot_down = NORMAL; /* 0 */
- zlist = NULL;
- boot_time = 0;
- /* get file size, rounding down to last full record */
- pos = xlseek(file, 0, SEEK_END) / sizeof(ut) * sizeof(ut);
- for (;;) {
- pos -= (off_t)sizeof(ut);
- if (pos < 0) {
- /* Beyond the beginning of the file boundary =>
- * the whole file has been read. */
- break;
- }
- xlseek(file, pos, SEEK_SET);
- xread(file, &ut, sizeof(ut));
- /* rewritten by each record, eventially will have
- * first record's ut_tv.tv_sec: */
- start_time = ut.ut_tv.tv_sec;
-
- switch (get_ut_type(&ut)) {
- case SHUTDOWN_TIME:
- down_time = ut.ut_tv.tv_sec;
- boot_down = DOWN;
- going_down = 1;
- break;
- case RUN_LVL:
- if (is_runlevel_shutdown(&ut)) {
- down_time = ut.ut_tv.tv_sec;
- going_down = 1;
- boot_down = DOWN;
- }
- break;
- case BOOT_TIME:
- strcpy(ut.ut_line, "system boot");
- show_entry(&ut, REBOOT, down_time);
- boot_down = CRASH;
- going_down = 1;
- break;
- case DEAD_PROCESS:
- if (!ut.ut_line[0]) {
- break;
- }
- /* add_entry */
- llist_add_to(&zlist, xmemdup(&ut, sizeof(ut)));
- break;
- case USER_PROCESS: {
- int show;
-
- if (!ut.ut_line[0]) {
- break;
- }
- /* find_entry */
- show = 1;
- {
- llist_t *el, *next;
- for (el = zlist; el; el = next) {
- struct utmpx *up = (struct utmpx *)el->data;
- next = el->link;
- if (strncmp(up->ut_line, ut.ut_line, __UT_LINESIZE) == 0) {
- if (show) {
- show_entry(&ut, NORMAL, up->ut_tv.tv_sec);
- show = 0;
- }
- llist_unlink(&zlist, el);
- free(el->data);
- free(el);
- }
- }
- }
-
- if (show) {
- int state = boot_down;
-
- if (boot_time == 0) {
- state = LOGGED;
- /* Check if the process is alive */
- if ((ut.ut_pid > 0)
- && (kill(ut.ut_pid, 0) != 0)
- && (errno == ESRCH)) {
- state = GONE;
- }
- }
- show_entry(&ut, state, boot_time);
- }
- /* add_entry */
- llist_add_to(&zlist, xmemdup(&ut, sizeof(ut)));
- break;
- }
- }
-
- if (going_down) {
- boot_time = ut.ut_tv.tv_sec;
- llist_free(zlist, free);
- zlist = NULL;
- going_down = 0;
- }
- }
-
- if (ENABLE_FEATURE_CLEAN_UP) {
- llist_free(zlist, free);
- }
-
- printf("\nwtmp begins %s", ctime(&start_time));
-
- if (ENABLE_FEATURE_CLEAN_UP)
- close(file);
- fflush_stdout_and_exit(EXIT_SUCCESS);
-}
+++ /dev/null
-/* vi: set sw=4 ts=4: */
-/*
- * mountpoint implementation for busybox
- *
- * Copyright (C) 2005 Bernhard Reutner-Fischer
- *
- * Licensed under GPLv2 or later, see file LICENSE in this source tree.
- *
- * Based on sysvinit's mountpoint
- */
-//config:config MOUNTPOINT
-//config: bool "mountpoint"
-//config: default y
-//config: help
-//config: mountpoint checks if the directory is a mountpoint.
-
-//applet:IF_MOUNTPOINT(APPLET(mountpoint, BB_DIR_BIN, BB_SUID_DROP))
-
-//kbuild:lib-$(CONFIG_MOUNTPOINT) += mountpoint.o
-
-//usage:#define mountpoint_trivial_usage
-//usage: "[-q] <[-dn] DIR | -x DEVICE>"
-//usage:#define mountpoint_full_usage "\n\n"
-//usage: "Check if the directory is a mountpoint\n"
-//usage: "\n -q Quiet"
-//usage: "\n -d Print major/minor device number of the filesystem"
-//usage: "\n -n Print device name of the filesystem"
-//usage: "\n -x Print major/minor device number of the blockdevice"
-//usage:
-//usage:#define mountpoint_example_usage
-//usage: "$ mountpoint /proc\n"
-//usage: "/proc is not a mountpoint\n"
-//usage: "$ mountpoint /sys\n"
-//usage: "/sys is a mountpoint\n"
-
-#include "libbb.h"
-
-int mountpoint_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int mountpoint_main(int argc UNUSED_PARAM, char **argv)
-{
- struct stat st;
- const char *msg;
- char *arg;
- int rc, opt;
-
- opt_complementary = "=1"; /* must have one argument */
- opt = getopt32(argv, "qdxn");
-#define OPT_q (1)
-#define OPT_d (2)
-#define OPT_x (4)
-#define OPT_n (8)
- arg = argv[optind];
- msg = "%s";
-
- rc = (opt & OPT_x) ? stat(arg, &st) : lstat(arg, &st);
- if (rc != 0)
- goto err;
-
- if (opt & OPT_x) {
- if (S_ISBLK(st.st_mode)) {
- printf("%u:%u\n", major(st.st_rdev),
- minor(st.st_rdev));
- return EXIT_SUCCESS;
- }
- errno = 0; /* make perror_msg work as error_msg */
- msg = "%s: not a block device";
- goto err;
- }
-
- errno = ENOTDIR;
- if (S_ISDIR(st.st_mode)) {
- dev_t st_dev = st.st_dev;
- ino_t st_ino = st.st_ino;
- char *p = xasprintf("%s/..", arg);
-
- if (stat(p, &st) == 0) {
- //int is_mnt = (st_dev != st.st_dev) || (st_dev == st.st_dev && st_ino == st.st_ino);
- int is_not_mnt = (st_dev == st.st_dev) && (st_ino != st.st_ino);
-
- if (opt & OPT_d)
- printf("%u:%u\n", major(st_dev), minor(st_dev));
- if (opt & OPT_n) {
- const char *d = find_block_device(arg);
- /* name is undefined, but device is mounted -> anonymous superblock! */
- /* happens with btrfs */
- if (!d) {
- d = "UNKNOWN";
- /* TODO: iterate /proc/mounts, or /proc/self/mountinfo
- * to find out the device name */
- }
- printf("%s %s\n", d, arg);
- }
- if (!(opt & (OPT_q | OPT_d | OPT_n)))
- printf("%s is %sa mountpoint\n", arg, is_not_mnt ? "not " : "");
- return is_not_mnt;
- }
- arg = p;
- /* else: stat had set errno, just fall through */
- }
-
- err:
- if (!(opt & OPT_q))
- bb_perror_msg(msg, arg);
- return EXIT_FAILURE;
-}
+++ /dev/null
-/* vi: set sw=4 ts=4: */
-/*
- * setsid.c -- execute a command in a new session
- * Rick Sladkey <jrs@world.std.com>
- * In the public domain.
- *
- * 1999-02-22 Arkadiusz Mickiewicz <misiek@pld.ORG.PL>
- * - added Native Language Support
- *
- * 2001-01-18 John Fremlin <vii@penguinpowered.com>
- * - fork in case we are process group leader
- *
- * 2004-11-12 Paul Fox
- * - busyboxed
- */
-//config:config SETSID
-//config: bool "setsid"
-//config: default y
-//config: help
-//config: setsid runs a program in a new session
-
-//applet:IF_SETSID(APPLET(setsid, BB_DIR_USR_BIN, BB_SUID_DROP))
-
-//kbuild:lib-$(CONFIG_SETSID) += setsid.o
-
-//usage:#define setsid_trivial_usage
-//usage: "[-c] PROG ARGS"
-//usage:#define setsid_full_usage "\n\n"
-//usage: "Run PROG in a new session. PROG will have no controlling terminal\n"
-//usage: "and will not be affected by keyboard signals (^C etc).\n"
-//usage: "\n -c Set controlling terminal to stdin"
-
-#include "libbb.h"
-
-int setsid_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int setsid_main(int argc UNUSED_PARAM, char **argv)
-{
- unsigned opt;
-
- opt_complementary = "-1"; /* at least one arg */
- opt = getopt32(argv, "+c"); /* +: stop on first non-opt */
- argv += optind;
-
- /* setsid() is allowed only when we are not a process group leader.
- * Otherwise our PID serves as PGID of some existing process group
- * and cannot be used as PGID of a new process group.
- *
- * Example: setsid() below fails when run alone in interactive shell:
- * $ setsid PROG
- * because shell's child (setsid) is put in a new process group.
- * But doesn't fail if shell is not interactive
- * (and therefore doesn't create process groups for pipes),
- * or if setsid is not the first process in the process group:
- * $ true | setsid PROG
- * or if setsid is executed in backquotes (`setsid PROG`)...
- */
- if (setsid() < 0) {
- pid_t pid = fork_or_rexec(argv);
- if (pid != 0) {
- /* parent */
- /* TODO:
- * we can waitpid(pid, &status, 0) and then even
- * emulate exitcode, making the behavior consistent
- * in both forked and non forked cases.
- * However, the code is larger and upstream
- * does not do such trick.
- */
- return EXIT_SUCCESS;
- }
-
- /* child */
- /* now there should be no error: */
- setsid();
- }
-
- if (opt) {
- /* -c: set (with stealing) controlling tty */
- ioctl(0, TIOCSCTTY, 1);
- }
-
- BB_EXECVP_or_die(argv);
-}
+++ /dev/null
-/* vi: set sw=4 ts=4: */
-/*
- * taskset - retrieve or set a processes' CPU affinity
- * Copyright (c) 2006 Bernhard Reutner-Fischer
- *
- * Licensed under GPLv2 or later, see file LICENSE in this source tree.
- */
-
-//config:config TASKSET
-//config: bool "taskset"
-//config: default y
-//config: help
-//config: Retrieve or set a processes's CPU affinity.
-//config: This requires sched_{g,s}etaffinity support in your libc.
-//config:
-//config:config FEATURE_TASKSET_FANCY
-//config: bool "Fancy output"
-//config: default y
-//config: depends on TASKSET
-//config: help
-//config: Needed for machines with more than 32-64 CPUs:
-//config: affinity parameter 0xHHHHHHHHHHHHHHHHHHHH can be arbitrarily long
-//config: in this case. Otherwise, it is limited to sizeof(long).
-
-//applet:IF_TASKSET(APPLET(taskset, BB_DIR_USR_BIN, BB_SUID_DROP))
-//kbuild:lib-$(CONFIG_TASKSET) += taskset.o
-
-//usage:#define taskset_trivial_usage
-//usage: "[-p] [HEXMASK] PID | PROG ARGS"
-//usage:#define taskset_full_usage "\n\n"
-//usage: "Set or get CPU affinity\n"
-//usage: "\n -p Operate on an existing PID"
-//usage:
-//usage:#define taskset_example_usage
-//usage: "$ taskset 0x7 ./dgemm_test&\n"
-//usage: "$ taskset -p 0x1 $!\n"
-//usage: "pid 4790's current affinity mask: 7\n"
-//usage: "pid 4790's new affinity mask: 1\n"
-//usage: "$ taskset 0x7 /bin/sh -c './taskset -p 0x1 $$'\n"
-//usage: "pid 6671's current affinity mask: 1\n"
-//usage: "pid 6671's new affinity mask: 1\n"
-//usage: "$ taskset -p 1\n"
-//usage: "pid 1's current affinity mask: 3\n"
-/*
- * Not yet implemented:
- * -a/--all-tasks (affect all threads)
- * needs to get TIDs from /proc/PID/task/ and use _them_ as "pid" in sched_setaffinity(pid)
- * -c/--cpu-list (specify CPUs via "1,3,5-7")
- */
-
-#include <sched.h>
-#include "libbb.h"
-
-typedef unsigned long ul;
-#define SZOF_UL (unsigned)(sizeof(ul))
-#define BITS_UL (unsigned)(sizeof(ul)*8)
-#define MASK_UL (unsigned)(sizeof(ul)*8 - 1)
-
-#if ENABLE_FEATURE_TASKSET_FANCY
-#define TASKSET_PRINTF_MASK "%s"
-/* craft a string from the mask */
-static char *from_mask(const ul *mask, unsigned sz_in_bytes)
-{
- char *str = xzalloc((sz_in_bytes+1) * 2); /* we will leak it */
- char *p = str;
- for (;;) {
- ul v = *mask++;
- if (SZOF_UL == 4)
- p += sprintf(p, "%08lx", v);
- if (SZOF_UL == 8)
- p += sprintf(p, "%016lx", v);
- if (SZOF_UL == 16)
- p += sprintf(p, "%032lx", v); /* :) */
- sz_in_bytes -= SZOF_UL;
- if ((int)sz_in_bytes <= 0)
- break;
- }
- while (str[0] == '0' && str[1])
- str++;
- return str;
-}
-#else
-#define TASKSET_PRINTF_MASK "%lx"
-static unsigned long long from_mask(ul *mask, unsigned sz_in_bytes UNUSED_PARAM)
-{
- return *mask;
-}
-#endif
-
-static unsigned long *get_aff(int pid, unsigned *sz)
-{
- int r;
- unsigned long *mask = NULL;
- unsigned sz_in_bytes = *sz;
-
- for (;;) {
- mask = xrealloc(mask, sz_in_bytes);
- r = sched_getaffinity(pid, sz_in_bytes, (void*)mask);
- if (r == 0)
- break;
- sz_in_bytes *= 2;
- if (errno == EINVAL && (int)sz_in_bytes > 0)
- continue;
- bb_perror_msg_and_die("can't %cet pid %d's affinity", 'g', pid);
- }
- //bb_error_msg("get mask[0]:%lx sz_in_bytes:%d", mask[0], sz_in_bytes);
- *sz = sz_in_bytes;
- return mask;
-}
-
-int taskset_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int taskset_main(int argc UNUSED_PARAM, char **argv)
-{
- ul *mask;
- unsigned mask_size_in_bytes;
- pid_t pid = 0;
- unsigned opt_p;
- const char *current_new;
- char *aff;
-
- /* NB: we mimic util-linux's taskset: -p does not take
- * an argument, i.e., "-pN" is NOT valid, only "-p N"!
- * Indeed, util-linux-2.13-pre7 uses:
- * getopt_long(argc, argv, "+pchV", ...), not "...p:..." */
-
- opt_complementary = "-1"; /* at least 1 arg */
- opt_p = getopt32(argv, "+p");
- argv += optind;
-
- aff = *argv++;
- if (opt_p) {
- char *pid_str = aff;
- if (*argv) { /* "-p <aff> <pid> ...rest.is.ignored..." */
- pid_str = *argv; /* NB: *argv != NULL in this case */
- }
- /* else it was just "-p <pid>", and *argv == NULL */
- pid = xatoul_range(pid_str, 1, ((unsigned)(pid_t)ULONG_MAX) >> 1);
- } else {
- /* <aff> <cmd...> */
- if (!*argv)
- bb_show_usage();
- }
-
- mask_size_in_bytes = SZOF_UL;
- current_new = "current";
- print_aff:
- mask = get_aff(pid, &mask_size_in_bytes);
- if (opt_p) {
- printf("pid %d's %s affinity mask: "TASKSET_PRINTF_MASK"\n",
- pid, current_new, from_mask(mask, mask_size_in_bytes));
- if (*argv == NULL) {
- /* Either it was just "-p <pid>",
- * or it was "-p <aff> <pid>" and we came here
- * for the second time (see goto below) */
- return EXIT_SUCCESS;
- }
- *argv = NULL;
- current_new = "new";
- }
- memset(mask, 0, mask_size_in_bytes);
-
- /* Affinity was specified, translate it into mask */
- /* it is always in hex, skip "0x" if it exists */
- if (aff[0] == '0' && (aff[1]|0x20) == 'x')
- aff += 2;
-
- if (!ENABLE_FEATURE_TASKSET_FANCY) {
- mask[0] = xstrtoul(aff, 16);
- } else {
- unsigned i;
- char *last_char;
-
- i = 0; /* bit pos in mask[] */
-
- /* aff is ASCII hex string, accept very long masks in this form.
- * Process hex string AABBCCDD... to ulong mask[]
- * from the rightmost nibble, which is least-significant.
- * Bits not fitting into mask[] are ignored: (example: 1234
- * in 12340000000000000000000000000000000000000ff)
- */
- last_char = strchrnul(aff, '\0');
- while (last_char > aff) {
- char c;
- ul val;
-
- last_char--;
- c = *last_char;
- if (isdigit(c))
- val = c - '0';
- else if ((c|0x20) >= 'a' && (c|0x20) <= 'f')
- val = (c|0x20) - ('a' - 10);
- else
- bb_error_msg_and_die("bad affinity '%s'", aff);
-
- if (i < mask_size_in_bytes * 8) {
- mask[i / BITS_UL] |= val << (i & MASK_UL);
- //bb_error_msg("bit %d set", i);
- }
- /* else:
- * We can error out here, but we don't.
- * For one, kernel itself ignores bits in mask[]
- * which do not map to any CPUs:
- * if mask[] has one 32-bit long element,
- * but you have only 8 CPUs, all bits beyond first 8
- * are ignored, silently.
- * No point in making bits past 31th to be errors.
- */
- i += 4;
- }
- }
-
- /* Set pid's or our own (pid==0) affinity */
- if (sched_setaffinity(pid, mask_size_in_bytes, (void*)mask))
- bb_perror_msg_and_die("can't %cet pid %d's affinity", 's', pid);
- //bb_error_msg("set mask[0]:%lx", mask[0]);
-
- if (!argv[0]) /* "-p <aff> <pid> [...ignored...]" */
- goto print_aff; /* print new affinity and exit */
-
- BB_EXECVP_or_die(argv);
-}
+++ /dev/null
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
- * COPYING NOTES
- *
- * timeout.c -- a timeout handler for shell commands
- *
- * Copyright (C) 2005-6, Roberto A. Foglietta <me@roberto.foglietta.name>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
- */
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
- * REVISION NOTES:
- * released 17-11-2005 by Roberto A. Foglietta
- * talarm 04-12-2005 by Roberto A. Foglietta
- * modified 05-12-2005 by Roberto A. Foglietta
- * sizerdct 06-12-2005 by Roberto A. Foglietta
- * splitszf 12-05-2006 by Roberto A. Foglietta
- * rewrite 14-11-2008 vda
- */
-//config:config TIMEOUT
-//config: bool "timeout"
-//config: default y
-//config: help
-//config: Runs a program and watches it. If it does not terminate in
-//config: specified number of seconds, it is sent a signal.
-
-//applet:IF_TIMEOUT(APPLET(timeout, BB_DIR_USR_BIN, BB_SUID_DROP))
-
-//kbuild:lib-$(CONFIG_TIMEOUT) += timeout.o
-
-//usage:#define timeout_trivial_usage
-//usage: "[-t SECS] [-s SIG] PROG ARGS"
-//usage:#define timeout_full_usage "\n\n"
-//usage: "Runs PROG. Sends SIG to it if it is not gone in SECS seconds.\n"
-//usage: "Defaults: SECS: 10, SIG: TERM."
-
-#include "libbb.h"
-
-int timeout_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int timeout_main(int argc UNUSED_PARAM, char **argv)
-{
- int signo;
- int status;
- int parent = 0;
- int timeout = 10;
- pid_t pid;
-#if !BB_MMU
- char *sv1, *sv2;
-#endif
- const char *opt_s = "TERM";
-
- /* -p option is not documented, it is needed to support NOMMU. */
-
- /* -t SECONDS; -p PARENT_PID */
- /* '+': stop at first non-option */
- getopt32(argv, "+s:t:+" USE_FOR_NOMMU("p:+"), &opt_s, &timeout, &parent);
- /*argv += optind; - no, wait for bb_daemonize_or_rexec! */
- signo = get_signum(opt_s);
- if (signo < 0)
- bb_error_msg_and_die("unknown signal '%s'", opt_s);
-
- /* We want to create a grandchild which will watch
- * and kill the grandparent. Other methods:
- * making parent watch child disrupts parent<->child link
- * (example: "tcpsvd 0.0.0.0 1234 timeout service_prog" -
- * it's better if service_prog is a child of tcpsvd!),
- * making child watch parent results in programs having
- * unexpected children. */
-
- if (parent) /* we were re-execed, already grandchild */
- goto grandchild;
- if (!argv[optind]) /* no PROG? */
- bb_show_usage();
-
-#if !BB_MMU
- sv1 = argv[optind];
- sv2 = argv[optind + 1];
-#endif
- pid = xvfork();
- if (pid == 0) {
- /* Child: spawn grandchild and exit */
- parent = getppid();
-#if !BB_MMU
- argv[optind] = xasprintf("-p%u", parent);
- argv[optind + 1] = NULL;
-#endif
- /* NB: exits with nonzero on error: */
- bb_daemonize_or_rexec(0, argv);
- /* Here we are grandchild. Sleep, then kill grandparent */
- grandchild:
- /* Just sleep(HUGE_NUM); kill(parent) may kill wrong process! */
- while (1) {
- sleep(1);
- if (--timeout <= 0)
- break;
- if (kill(parent, 0)) {
- /* process is gone */
- return EXIT_SUCCESS;
- }
- }
- kill(parent, signo);
- return EXIT_SUCCESS;
- }
-
- /* Parent */
- wait(&status); /* wait for child to die */
- /* Did intermediate [v]fork or exec fail? */
- if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
- return EXIT_FAILURE;
- /* Ok, exec a program as requested */
- argv += optind;
-#if !BB_MMU
- argv[0] = sv1;
- argv[1] = sv2;
-#endif
- BB_EXECVP_or_die(argv);
-}
+++ /dev/null
-/* vi: set sw=4 ts=4: */
-/*
- * wall - write a message to all logged-in users
- * Copyright (c) 2009 Bernhard Reutner-Fischer
- *
- * Licensed under GPLv2 or later, see file LICENSE in this source tree.
- */
-
-//config:config WALL
-//config: bool "wall"
-//config: default y
-//config: depends on FEATURE_UTMP
-//config: help
-//config: Write a message to all users that are logged in.
-
-/* Needs to be run by root or be suid root - needs to write to /dev/TTY: */
-//applet:IF_WALL(APPLET(wall, BB_DIR_USR_BIN, BB_SUID_REQUIRE))
-
-//kbuild:lib-$(CONFIG_WALL) += wall.o
-
-//usage:#define wall_trivial_usage
-//usage: "[FILE]"
-//usage:#define wall_full_usage "\n\n"
-//usage: "Write content of FILE or stdin to all logged-in users"
-//usage:
-//usage:#define wall_sample_usage
-//usage: "echo foo | wall\n"
-//usage: "wall ./mymessage"
-
-#include "libbb.h"
-
-int wall_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int wall_main(int argc UNUSED_PARAM, char **argv)
-{
- struct utmpx *ut;
- char *msg;
- int fd;
-
- fd = STDIN_FILENO;
- if (argv[1]) {
- /* The applet is setuid.
- * Access to the file must be under user's uid/gid.
- */
- fd = xopen_as_uid_gid(argv[1], O_RDONLY, getuid(), getgid());
- }
- msg = xmalloc_read(fd, NULL);
- if (ENABLE_FEATURE_CLEAN_UP && argv[1])
- close(fd);
- setutxent();
- while ((ut = getutxent()) != NULL) {
- char *line;
- if (ut->ut_type != USER_PROCESS)
- continue;
- line = concat_path_file("/dev", ut->ut_line);
- xopen_xwrite_close(line, msg);
- free(line);
- }
- if (ENABLE_FEATURE_CLEAN_UP) {
- endutxent();
- free(msg);
- }
- return EXIT_SUCCESS;
-}
--- /dev/null
+/* vi: set sw=4 ts=4: */
+/*
+ * chrt - manipulate real-time attributes of a process
+ * Copyright (c) 2006-2007 Bernhard Reutner-Fischer
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
+//config:config CHRT
+//config: bool "chrt"
+//config: default y
+//config: help
+//config: manipulate real-time attributes of a process.
+//config: This requires sched_{g,s}etparam support in your libc.
+
+//applet:IF_CHRT(APPLET(chrt, BB_DIR_USR_BIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_CHRT) += chrt.o
+
+//usage:#define chrt_trivial_usage
+//usage: "[-prfom] [PRIO] [PID | PROG ARGS]"
+//usage:#define chrt_full_usage "\n\n"
+//usage: "Change scheduling priority and class for a process\n"
+//usage: "\n -p Operate on PID"
+//usage: "\n -r Set SCHED_RR class"
+//usage: "\n -f Set SCHED_FIFO class"
+//usage: "\n -o Set SCHED_OTHER class"
+//usage: "\n -m Show min/max priorities"
+//usage:
+//usage:#define chrt_example_usage
+//usage: "$ chrt -r 4 sleep 900; x=$!\n"
+//usage: "$ chrt -f -p 3 $x\n"
+//usage: "You need CAP_SYS_NICE privileges to set scheduling attributes of a process"
+
+#include <sched.h>
+#include "libbb.h"
+
+static const struct {
+ int policy;
+ char name[sizeof("SCHED_OTHER")];
+} policies[] = {
+ {SCHED_OTHER, "SCHED_OTHER"},
+ {SCHED_FIFO, "SCHED_FIFO"},
+ {SCHED_RR, "SCHED_RR"}
+};
+
+//TODO: add
+// -b, SCHED_BATCH
+// -i, SCHED_IDLE
+
+static void show_min_max(int pol)
+{
+ const char *fmt = "%s min/max priority\t: %u/%u\n";
+ int max, min;
+
+ max = sched_get_priority_max(pol);
+ min = sched_get_priority_min(pol);
+ if ((max|min) < 0)
+ fmt = "%s not supported\n";
+ printf(fmt, policies[pol].name, min, max);
+}
+
+#define OPT_m (1<<0)
+#define OPT_p (1<<1)
+#define OPT_r (1<<2)
+#define OPT_f (1<<3)
+#define OPT_o (1<<4)
+
+int chrt_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int chrt_main(int argc UNUSED_PARAM, char **argv)
+{
+ pid_t pid = 0;
+ unsigned opt;
+ struct sched_param sp;
+ char *pid_str;
+ char *priority = priority; /* for compiler */
+ const char *current_new;
+ int policy = SCHED_RR;
+
+ /* only one policy accepted */
+ opt_complementary = "r--fo:f--ro:o--rf";
+ opt = getopt32(argv, "+mprfo");
+ if (opt & OPT_m) { /* print min/max and exit */
+ show_min_max(SCHED_FIFO);
+ show_min_max(SCHED_RR);
+ show_min_max(SCHED_OTHER);
+ fflush_stdout_and_exit(EXIT_SUCCESS);
+ }
+ if (opt & OPT_r)
+ policy = SCHED_RR;
+ if (opt & OPT_f)
+ policy = SCHED_FIFO;
+ if (opt & OPT_o)
+ policy = SCHED_OTHER;
+
+ argv += optind;
+ if (!argv[0])
+ bb_show_usage();
+ if (opt & OPT_p) {
+ pid_str = *argv++;
+ if (*argv) { /* "-p <priority> <pid> [...]" */
+ priority = pid_str;
+ pid_str = *argv;
+ }
+ /* else "-p <pid>", and *argv == NULL */
+ pid = xatoul_range(pid_str, 1, ((unsigned)(pid_t)ULONG_MAX) >> 1);
+ } else {
+ priority = *argv++;
+ if (!*argv)
+ bb_show_usage();
+ }
+
+ current_new = "current\0new";
+ if (opt & OPT_p) {
+ int pol;
+ print_rt_info:
+ pol = sched_getscheduler(pid);
+ if (pol < 0)
+ bb_perror_msg_and_die("can't %cet pid %d's policy", 'g', (int)pid);
+ printf("pid %d's %s scheduling policy: %s\n",
+ pid, current_new, policies[pol].name);
+ if (sched_getparam(pid, &sp))
+ bb_perror_msg_and_die("can't get pid %d's attributes", (int)pid);
+ printf("pid %d's %s scheduling priority: %d\n",
+ (int)pid, current_new, sp.sched_priority);
+ if (!*argv) {
+ /* Either it was just "-p <pid>",
+ * or it was "-p <priority> <pid>" and we came here
+ * for the second time (see goto below) */
+ return EXIT_SUCCESS;
+ }
+ *argv = NULL;
+ current_new += 8;
+ }
+
+ /* from the manpage of sched_getscheduler:
+ [...] sched_priority can have a value in the range 0 to 99.
+ [...] SCHED_OTHER or SCHED_BATCH must be assigned static priority 0.
+ [...] SCHED_FIFO or SCHED_RR can have static priority in 1..99 range.
+ */
+ sp.sched_priority = xstrtou_range(priority, 0, policy != SCHED_OTHER ? 1 : 0, 99);
+
+ if (sched_setscheduler(pid, policy, &sp) < 0)
+ bb_perror_msg_and_die("can't %cet pid %d's policy", 's', (int)pid);
+
+ if (!argv[0]) /* "-p <priority> <pid> [...]" */
+ goto print_rt_info;
+
+ BB_EXECVP_or_die(argv);
+}
--- /dev/null
+/* vi: set sw=4 ts=4: */
+/*
+ * eject implementation for busybox
+ *
+ * Copyright (C) 2004 Peter Willis <psyphreak@phreaker.net>
+ * Copyright (C) 2005 Tito Ragusa <farmatito@tiscali.it>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
+
+/*
+ * This is a simple hack of eject based on something Erik posted in #uclibc.
+ * Most of the dirty work blatantly ripped off from cat.c =)
+ */
+//config:config EJECT
+//config: bool "eject"
+//config: default y
+//config: select PLATFORM_LINUX
+//config: help
+//config: Used to eject cdroms. (defaults to /dev/cdrom)
+//config:
+//config:config FEATURE_EJECT_SCSI
+//config: bool "SCSI support"
+//config: default y
+//config: depends on EJECT
+//config: help
+//config: Add the -s option to eject, this allows to eject SCSI-Devices and
+//config: usb-storage devices.
+
+//applet:IF_EJECT(APPLET(eject, BB_DIR_USR_BIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_EJECT) += eject.o
+
+//usage:#define eject_trivial_usage
+//usage: "[-t] [-T] [DEVICE]"
+//usage:#define eject_full_usage "\n\n"
+//usage: "Eject DEVICE or default /dev/cdrom\n"
+//usage: IF_FEATURE_EJECT_SCSI(
+//usage: "\n -s SCSI device"
+//usage: )
+//usage: "\n -t Close tray"
+//usage: "\n -T Open/close tray (toggle)"
+
+#include <sys/mount.h>
+#include "libbb.h"
+#if ENABLE_FEATURE_EJECT_SCSI
+/* Must be after libbb.h: they need size_t */
+# include "fix_u32.h"
+# include <scsi/sg.h>
+# include <scsi/scsi.h>
+#endif
+
+#define dev_fd 3
+
+/* Code taken from the original eject (http://eject.sourceforge.net/),
+ * refactored it a bit for busybox (ne-bb@nicoerfurth.de) */
+
+#if ENABLE_FEATURE_EJECT_SCSI
+static void eject_scsi(const char *dev)
+{
+ static const char sg_commands[3][6] ALIGN1 = {
+ { ALLOW_MEDIUM_REMOVAL, 0, 0, 0, 0, 0 },
+ { START_STOP, 0, 0, 0, 1, 0 },
+ { START_STOP, 0, 0, 0, 2, 0 }
+ };
+
+ unsigned i;
+ unsigned char sense_buffer[32];
+ unsigned char inqBuff[2];
+ sg_io_hdr_t io_hdr;
+
+ if ((ioctl(dev_fd, SG_GET_VERSION_NUM, &i) < 0) || (i < 30000))
+ bb_error_msg_and_die("not a sg device or old sg driver");
+
+ memset(&io_hdr, 0, sizeof(sg_io_hdr_t));
+ io_hdr.interface_id = 'S';
+ io_hdr.cmd_len = 6;
+ io_hdr.mx_sb_len = sizeof(sense_buffer);
+ io_hdr.dxfer_direction = SG_DXFER_NONE;
+ /* io_hdr.dxfer_len = 0; */
+ io_hdr.dxferp = inqBuff;
+ io_hdr.sbp = sense_buffer;
+ io_hdr.timeout = 2000;
+
+ for (i = 0; i < 3; i++) {
+ io_hdr.cmdp = (void *)sg_commands[i];
+ ioctl_or_perror_and_die(dev_fd, SG_IO, (void *)&io_hdr, "%s", dev);
+ }
+
+ /* force kernel to reread partition table when new disc is inserted */
+ ioctl(dev_fd, BLKRRPART);
+}
+#else
+# define eject_scsi(dev) ((void)0)
+#endif
+
+/* various defines swiped from linux/cdrom.h */
+#define CDROMCLOSETRAY 0x5319 /* pendant of CDROMEJECT */
+#define CDROMEJECT 0x5309 /* Ejects the cdrom media */
+#define CDROM_DRIVE_STATUS 0x5326 /* Get tray position, etc. */
+/* drive status possibilities returned by CDROM_DRIVE_STATUS ioctl */
+#define CDS_TRAY_OPEN 2
+
+#define FLAG_CLOSE 1
+#define FLAG_SMART 2
+#define FLAG_SCSI 4
+
+static void eject_cdrom(unsigned flags, const char *dev)
+{
+ int cmd = CDROMEJECT;
+
+ if (flags & FLAG_CLOSE
+ || ((flags & FLAG_SMART) && ioctl(dev_fd, CDROM_DRIVE_STATUS) == CDS_TRAY_OPEN)
+ ) {
+ cmd = CDROMCLOSETRAY;
+ }
+
+ ioctl_or_perror_and_die(dev_fd, cmd, NULL, "%s", dev);
+}
+
+int eject_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int eject_main(int argc UNUSED_PARAM, char **argv)
+{
+ unsigned flags;
+ const char *device;
+
+ opt_complementary = "?1:t--T:T--t";
+ flags = getopt32(argv, "tT" IF_FEATURE_EJECT_SCSI("s"));
+ device = argv[optind] ? argv[optind] : "/dev/cdrom";
+
+ /* We used to do "umount <device>" here, but it was buggy
+ if something was mounted OVER cdrom and
+ if cdrom is mounted many times.
+
+ This works equally well (or better):
+ #!/bin/sh
+ umount /dev/cdrom
+ eject /dev/cdrom
+ */
+
+ xmove_fd(xopen_nonblocking(device), dev_fd);
+
+ if (ENABLE_FEATURE_EJECT_SCSI && (flags & FLAG_SCSI))
+ eject_scsi(device);
+ else
+ eject_cdrom(flags, device);
+
+ if (ENABLE_FEATURE_CLEAN_UP)
+ close(dev_fd);
+
+ return EXIT_SUCCESS;
+}
--- /dev/null
+/* vi: set sw=4 ts=4: */
+/*
+ * ionice implementation for busybox based on linux-utils-ng 2.14
+ *
+ * Copyright (C) 2008 by <u173034@informatik.uni-oldenburg.de>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
+//config:config IONICE
+//config: bool "ionice"
+//config: default y
+//config: select PLATFORM_LINUX
+//config: help
+//config: Set/set program io scheduling class and priority
+//config: Requires kernel >= 2.6.13
+
+//applet:IF_IONICE(APPLET(ionice, BB_DIR_BIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_IONICE) += ionice.o
+
+//usage:#define ionice_trivial_usage
+//usage: "[-c 1-3] [-n 0-7] [-p PID] [PROG]"
+//usage:#define ionice_full_usage "\n\n"
+//usage: "Change I/O priority and class\n"
+//usage: "\n -c Class. 1:realtime 2:best-effort 3:idle"
+//usage: "\n -n Priority"
+
+#include <sys/syscall.h>
+#include <asm/unistd.h>
+#include "libbb.h"
+
+static int ioprio_set(int which, int who, int ioprio)
+{
+ return syscall(SYS_ioprio_set, which, who, ioprio);
+}
+
+static int ioprio_get(int which, int who)
+{
+ return syscall(SYS_ioprio_get, which, who);
+}
+
+enum {
+ IOPRIO_WHO_PROCESS = 1,
+ IOPRIO_WHO_PGRP,
+ IOPRIO_WHO_USER
+};
+
+enum {
+ IOPRIO_CLASS_NONE,
+ IOPRIO_CLASS_RT,
+ IOPRIO_CLASS_BE,
+ IOPRIO_CLASS_IDLE
+};
+
+static const char to_prio[] ALIGN1 = "none\0realtime\0best-effort\0idle";
+
+#define IOPRIO_CLASS_SHIFT 13
+
+int ionice_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int ionice_main(int argc UNUSED_PARAM, char **argv)
+{
+ /* Defaults */
+ int ioclass = 0;
+ int pri = 0;
+ int pid = 0; /* affect own porcess */
+ int opt;
+ enum {
+ OPT_n = 1,
+ OPT_c = 2,
+ OPT_p = 4,
+ };
+
+ /* Numeric params */
+ /* '+': stop at first non-option */
+ opt = getopt32(argv, "+n:+c:+p:+", &pri, &ioclass, &pid);
+ argv += optind;
+
+ if (opt & OPT_c) {
+ if (ioclass > 3)
+ bb_error_msg_and_die("bad class %d", ioclass);
+// Do we need this (compat?)?
+// if (ioclass == IOPRIO_CLASS_NONE)
+// ioclass = IOPRIO_CLASS_BE;
+// if (ioclass == IOPRIO_CLASS_IDLE) {
+// //if (opt & OPT_n)
+// // bb_error_msg("ignoring priority for idle class");
+// pri = 7;
+// }
+ }
+
+ if (!(opt & (OPT_n|OPT_c))) {
+ if (!(opt & OPT_p) && *argv)
+ pid = xatoi_positive(*argv);
+
+ pri = ioprio_get(IOPRIO_WHO_PROCESS, pid);
+ if (pri == -1)
+ bb_perror_msg_and_die("ioprio_%cet", 'g');
+
+ ioclass = (pri >> IOPRIO_CLASS_SHIFT) & 0x3;
+ pri &= 0xff;
+ printf((ioclass == IOPRIO_CLASS_IDLE) ? "%s\n" : "%s: prio %d\n",
+ nth_string(to_prio, ioclass), pri);
+ } else {
+//printf("pri=%d class=%d val=%x\n",
+//pri, ioclass, pri | (ioclass << IOPRIO_CLASS_SHIFT));
+ pri |= (ioclass << IOPRIO_CLASS_SHIFT);
+ if (ioprio_set(IOPRIO_WHO_PROCESS, pid, pri) == -1)
+ bb_perror_msg_and_die("ioprio_%cet", 's');
+ if (argv[0]) {
+ BB_EXECVP_or_die(argv);
+ }
+ }
+
+ return EXIT_SUCCESS;
+}
--- /dev/null
+/* vi: set sw=4 ts=4: */
+/*
+ * last implementation for busybox
+ *
+ * Copyright (C) 2003-2004 by Erik Andersen <andersen@codepoet.org>
+ *
+ * Licensed under GPLv2, see file LICENSE in this source tree.
+ */
+//config:config LAST
+//config: bool "last"
+//config: default y
+//config: depends on FEATURE_WTMP
+//config: help
+//config: 'last' displays a list of the last users that logged into the system.
+//config:
+//config:config FEATURE_LAST_FANCY
+//config: bool "Output extra information"
+//config: default y
+//config: depends on LAST
+//config: help
+//config: 'last' displays detailed information about the last users that
+//config: logged into the system (mimics sysvinit last). +900 bytes.
+
+//applet:IF_LAST(APPLET(last, BB_DIR_USR_BIN, BB_SUID_DROP))
+
+//kbuild:ifeq ($(CONFIG_FEATURE_LAST_FANCY),y)
+//kbuild:lib-$(CONFIG_FEATURE_LAST_FANCY) += last_fancy.o
+//kbuild:else
+//kbuild:lib-$(CONFIG_LAST) += last.o
+//kbuild:endif
+
+//usage:#define last_trivial_usage
+//usage: ""IF_FEATURE_LAST_FANCY("[-HW] [-f FILE]")
+//usage:#define last_full_usage "\n\n"
+//usage: "Show listing of the last users that logged into the system"
+//usage: IF_FEATURE_LAST_FANCY( "\n"
+/* //usage: "\n -H Show header line" */
+//usage: "\n -W Display with no host column truncation"
+//usage: "\n -f FILE Read from FILE instead of /var/log/wtmp"
+//usage: )
+
+#include "libbb.h"
+
+/* NB: ut_name and ut_user are the same field, use only one name (ut_user)
+ * to reduce confusion */
+
+#ifndef SHUTDOWN_TIME
+# define SHUTDOWN_TIME 254
+#endif
+
+/* Grr... utmp char[] members do not have to be nul-terminated.
+ * Do what we can while still keeping this reasonably small.
+ * Note: We are assuming the ut_id[] size is fixed at 4. */
+
+#if defined UT_LINESIZE \
+ && ((UT_LINESIZE != 32) || (UT_NAMESIZE != 32) || (UT_HOSTSIZE != 256))
+#error struct utmpx member char[] size(s) have changed!
+#elif defined __UT_LINESIZE \
+ && ((__UT_LINESIZE != 32) || (__UT_NAMESIZE != 32) || (__UT_HOSTSIZE != 256))
+/* __UT_NAMESIZE was checked with 64 above, but glibc-2.11 definitely uses 32! */
+#error struct utmpx member char[] size(s) have changed!
+#endif
+
+#if EMPTY != 0 || RUN_LVL != 1 || BOOT_TIME != 2 || NEW_TIME != 3 || \
+ OLD_TIME != 4
+#error Values for the ut_type field of struct utmpx changed
+#endif
+
+int last_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int last_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
+{
+ struct utmpx ut;
+ int n, file = STDIN_FILENO;
+ time_t t_tmp;
+ off_t pos;
+ static const char _ut_usr[] ALIGN1 =
+ "runlevel\0" "reboot\0" "shutdown\0";
+ static const char _ut_lin[] ALIGN1 =
+ "~\0" "{\0" "|\0" /* "LOGIN\0" "date\0" */;
+ enum {
+ TYPE_RUN_LVL = RUN_LVL, /* 1 */
+ TYPE_BOOT_TIME = BOOT_TIME, /* 2 */
+ TYPE_SHUTDOWN_TIME = SHUTDOWN_TIME
+ };
+ enum {
+ _TILDE = EMPTY, /* 0 */
+ TYPE_NEW_TIME, /* NEW_TIME, 3 */
+ TYPE_OLD_TIME /* OLD_TIME, 4 */
+ };
+
+ if (argv[1]) {
+ bb_show_usage();
+ }
+ file = xopen(bb_path_wtmp_file, O_RDONLY);
+
+ printf("%-10s %-14s %-18s %-12.12s %s\n",
+ "USER", "TTY", "HOST", "LOGIN", "TIME");
+ /* yikes. We reverse over the file and that is a not too elegant way */
+ pos = xlseek(file, 0, SEEK_END);
+ pos = lseek(file, pos - sizeof(ut), SEEK_SET);
+ while ((n = full_read(file, &ut, sizeof(ut))) > 0) {
+ if (n != sizeof(ut)) {
+ bb_perror_msg_and_die("short read");
+ }
+ n = index_in_strings(_ut_lin, ut.ut_line);
+ if (n == _TILDE) { /* '~' */
+#if 1
+/* do we really need to be cautious here? */
+ n = index_in_strings(_ut_usr, ut.ut_user);
+ if (++n > 0)
+ ut.ut_type = n != 3 ? n : SHUTDOWN_TIME;
+#else
+ if (is_prefixed_with(ut.ut_user, "shutdown"))
+ ut.ut_type = SHUTDOWN_TIME;
+ else if (is_prefixed_with(ut.ut_user, "reboot"))
+ ut.ut_type = BOOT_TIME;
+ else if (is_prefixed_with(ut.ut_user, "runlevel"))
+ ut.ut_type = RUN_LVL;
+#endif
+ } else {
+ if (ut.ut_user[0] == '\0' || strcmp(ut.ut_user, "LOGIN") == 0) {
+ /* Don't bother. This means we can't find how long
+ * someone was logged in for. Oh well. */
+ goto next;
+ }
+ if (ut.ut_type != DEAD_PROCESS
+ && ut.ut_user[0]
+ && ut.ut_line[0]
+ ) {
+ ut.ut_type = USER_PROCESS;
+ }
+ if (strcmp(ut.ut_user, "date") == 0) {
+ if (n == TYPE_OLD_TIME) { /* '|' */
+ ut.ut_type = OLD_TIME;
+ }
+ if (n == TYPE_NEW_TIME) { /* '{' */
+ ut.ut_type = NEW_TIME;
+ }
+ }
+ }
+
+ if (ut.ut_type != USER_PROCESS) {
+ switch (ut.ut_type) {
+ case OLD_TIME:
+ case NEW_TIME:
+ case RUN_LVL:
+ case SHUTDOWN_TIME:
+ goto next;
+ case BOOT_TIME:
+ strcpy(ut.ut_line, "system boot");
+ }
+ }
+ /* manpages say ut_tv.tv_sec *is* time_t,
+ * but some systems have it wrong */
+ t_tmp = (time_t)ut.ut_tv.tv_sec;
+ printf("%-10s %-14s %-18s %-12.12s\n",
+ ut.ut_user, ut.ut_line, ut.ut_host, ctime(&t_tmp) + 4);
+ next:
+ pos -= sizeof(ut);
+ if (pos <= 0)
+ break; /* done. */
+ xlseek(file, pos, SEEK_SET);
+ }
+
+ fflush_stdout_and_exit(EXIT_SUCCESS);
+}
--- /dev/null
+/* vi: set sw=4 ts=4: */
+/*
+ * (sysvinit like) last implementation
+ *
+ * Copyright (C) 2008 by Patricia Muscalu <patricia.muscalu@axis.com>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
+
+#include "libbb.h"
+
+/* NB: ut_name and ut_user are the same field, use only one name (ut_user)
+ * to reduce confusion */
+
+#ifndef SHUTDOWN_TIME
+# define SHUTDOWN_TIME 254
+#endif
+
+#define HEADER_FORMAT "%-8.8s %-12.12s %-*.*s %-16.16s %-7.7s %s\n"
+#define HEADER_LINE "USER", "TTY", \
+ INET_ADDRSTRLEN, INET_ADDRSTRLEN, "HOST", "LOGIN", " TIME", ""
+#define HEADER_LINE_WIDE "USER", "TTY", \
+ INET6_ADDRSTRLEN, INET6_ADDRSTRLEN, "HOST", "LOGIN", " TIME", ""
+
+#if !defined __UT_LINESIZE && defined UT_LINESIZE
+# define __UT_LINESIZE UT_LINESIZE
+#endif
+
+enum {
+ NORMAL,
+ LOGGED,
+ DOWN,
+ REBOOT,
+ CRASH,
+ GONE
+};
+
+enum {
+ LAST_OPT_W = (1 << 0), /* -W wide */
+ LAST_OPT_f = (1 << 1), /* -f input file */
+ LAST_OPT_H = (1 << 2), /* -H header */
+};
+
+#define show_wide (option_mask32 & LAST_OPT_W)
+
+static void show_entry(struct utmpx *ut, int state, time_t dur_secs)
+{
+ unsigned days, hours, mins;
+ char duration[sizeof("(%u+02:02)") + sizeof(int)*3];
+ char login_time[17];
+ char logout_time[8];
+ const char *logout_str;
+ const char *duration_str;
+ time_t tmp;
+
+ /* manpages say ut_tv.tv_sec *is* time_t,
+ * but some systems have it wrong */
+ tmp = ut->ut_tv.tv_sec;
+ safe_strncpy(login_time, ctime(&tmp), 17);
+ tmp = dur_secs;
+ snprintf(logout_time, 8, "- %s", ctime(&tmp) + 11);
+
+ dur_secs = MAX(dur_secs - (time_t)ut->ut_tv.tv_sec, (time_t)0);
+ /* unsigned int is easier to divide than time_t (which may be signed long) */
+ mins = dur_secs / 60;
+ days = mins / (24*60);
+ mins = mins % (24*60);
+ hours = mins / 60;
+ mins = mins % 60;
+
+// if (days) {
+ sprintf(duration, "(%u+%02u:%02u)", days, hours, mins);
+// } else {
+// sprintf(duration, " (%02u:%02u)", hours, mins);
+// }
+
+ logout_str = logout_time;
+ duration_str = duration;
+ switch (state) {
+ case NORMAL:
+ break;
+ case LOGGED:
+ logout_str = " still";
+ duration_str = "logged in";
+ break;
+ case DOWN:
+ logout_str = "- down ";
+ break;
+ case REBOOT:
+ break;
+ case CRASH:
+ logout_str = "- crash";
+ break;
+ case GONE:
+ logout_str = " gone";
+ duration_str = "- no logout";
+ break;
+ }
+
+ printf(HEADER_FORMAT,
+ ut->ut_user,
+ ut->ut_line,
+ show_wide ? INET6_ADDRSTRLEN : INET_ADDRSTRLEN,
+ show_wide ? INET6_ADDRSTRLEN : INET_ADDRSTRLEN,
+ ut->ut_host,
+ login_time,
+ logout_str,
+ duration_str);
+}
+
+static int get_ut_type(struct utmpx *ut)
+{
+ if (ut->ut_line[0] == '~') {
+ if (strcmp(ut->ut_user, "shutdown") == 0) {
+ return SHUTDOWN_TIME;
+ }
+ if (strcmp(ut->ut_user, "reboot") == 0) {
+ return BOOT_TIME;
+ }
+ if (strcmp(ut->ut_user, "runlevel") == 0) {
+ return RUN_LVL;
+ }
+ return ut->ut_type;
+ }
+
+ if (ut->ut_user[0] == 0) {
+ return DEAD_PROCESS;
+ }
+
+ if ((ut->ut_type != DEAD_PROCESS)
+ && (strcmp(ut->ut_user, "LOGIN") != 0)
+ && ut->ut_user[0]
+ && ut->ut_line[0]
+ ) {
+ ut->ut_type = USER_PROCESS;
+ }
+
+ if (strcmp(ut->ut_user, "date") == 0) {
+ if (ut->ut_line[0] == '|') {
+ return OLD_TIME;
+ }
+ if (ut->ut_line[0] == '{') {
+ return NEW_TIME;
+ }
+ }
+ return ut->ut_type;
+}
+
+static int is_runlevel_shutdown(struct utmpx *ut)
+{
+ if (((ut->ut_pid & 255) == '0') || ((ut->ut_pid & 255) == '6')) {
+ return 1;
+ }
+
+ return 0;
+}
+
+int last_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int last_main(int argc UNUSED_PARAM, char **argv)
+{
+ struct utmpx ut;
+ const char *filename = _PATH_WTMP;
+ llist_t *zlist;
+ off_t pos;
+ time_t start_time;
+ time_t boot_time;
+ time_t down_time;
+ int file;
+ smallint going_down;
+ smallint boot_down;
+
+ /*opt =*/ getopt32(argv, "Wf:" /* "H" */, &filename);
+#ifdef BUT_UTIL_LINUX_LAST_HAS_NO_SUCH_OPT
+ if (opt & LAST_OPT_H) {
+ /* Print header line */
+ if (opt & LAST_OPT_W) {
+ printf(HEADER_FORMAT, HEADER_LINE_WIDE);
+ } else {
+ printf(HEADER_FORMAT, HEADER_LINE);
+ }
+ }
+#endif
+
+ file = xopen(filename, O_RDONLY);
+ {
+ /* in case the file is empty... */
+ struct stat st;
+ fstat(file, &st);
+ start_time = st.st_ctime;
+ }
+
+ time(&down_time);
+ going_down = 0;
+ boot_down = NORMAL; /* 0 */
+ zlist = NULL;
+ boot_time = 0;
+ /* get file size, rounding down to last full record */
+ pos = xlseek(file, 0, SEEK_END) / sizeof(ut) * sizeof(ut);
+ for (;;) {
+ pos -= (off_t)sizeof(ut);
+ if (pos < 0) {
+ /* Beyond the beginning of the file boundary =>
+ * the whole file has been read. */
+ break;
+ }
+ xlseek(file, pos, SEEK_SET);
+ xread(file, &ut, sizeof(ut));
+ /* rewritten by each record, eventially will have
+ * first record's ut_tv.tv_sec: */
+ start_time = ut.ut_tv.tv_sec;
+
+ switch (get_ut_type(&ut)) {
+ case SHUTDOWN_TIME:
+ down_time = ut.ut_tv.tv_sec;
+ boot_down = DOWN;
+ going_down = 1;
+ break;
+ case RUN_LVL:
+ if (is_runlevel_shutdown(&ut)) {
+ down_time = ut.ut_tv.tv_sec;
+ going_down = 1;
+ boot_down = DOWN;
+ }
+ break;
+ case BOOT_TIME:
+ strcpy(ut.ut_line, "system boot");
+ show_entry(&ut, REBOOT, down_time);
+ boot_down = CRASH;
+ going_down = 1;
+ break;
+ case DEAD_PROCESS:
+ if (!ut.ut_line[0]) {
+ break;
+ }
+ /* add_entry */
+ llist_add_to(&zlist, xmemdup(&ut, sizeof(ut)));
+ break;
+ case USER_PROCESS: {
+ int show;
+
+ if (!ut.ut_line[0]) {
+ break;
+ }
+ /* find_entry */
+ show = 1;
+ {
+ llist_t *el, *next;
+ for (el = zlist; el; el = next) {
+ struct utmpx *up = (struct utmpx *)el->data;
+ next = el->link;
+ if (strncmp(up->ut_line, ut.ut_line, __UT_LINESIZE) == 0) {
+ if (show) {
+ show_entry(&ut, NORMAL, up->ut_tv.tv_sec);
+ show = 0;
+ }
+ llist_unlink(&zlist, el);
+ free(el->data);
+ free(el);
+ }
+ }
+ }
+
+ if (show) {
+ int state = boot_down;
+
+ if (boot_time == 0) {
+ state = LOGGED;
+ /* Check if the process is alive */
+ if ((ut.ut_pid > 0)
+ && (kill(ut.ut_pid, 0) != 0)
+ && (errno == ESRCH)) {
+ state = GONE;
+ }
+ }
+ show_entry(&ut, state, boot_time);
+ }
+ /* add_entry */
+ llist_add_to(&zlist, xmemdup(&ut, sizeof(ut)));
+ break;
+ }
+ }
+
+ if (going_down) {
+ boot_time = ut.ut_tv.tv_sec;
+ llist_free(zlist, free);
+ zlist = NULL;
+ going_down = 0;
+ }
+ }
+
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ llist_free(zlist, free);
+ }
+
+ printf("\nwtmp begins %s", ctime(&start_time));
+
+ if (ENABLE_FEATURE_CLEAN_UP)
+ close(file);
+ fflush_stdout_and_exit(EXIT_SUCCESS);
+}
--- /dev/null
+/* vi: set sw=4 ts=4: */
+/*
+ * mountpoint implementation for busybox
+ *
+ * Copyright (C) 2005 Bernhard Reutner-Fischer
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ *
+ * Based on sysvinit's mountpoint
+ */
+//config:config MOUNTPOINT
+//config: bool "mountpoint"
+//config: default y
+//config: help
+//config: mountpoint checks if the directory is a mountpoint.
+
+//applet:IF_MOUNTPOINT(APPLET(mountpoint, BB_DIR_BIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_MOUNTPOINT) += mountpoint.o
+
+//usage:#define mountpoint_trivial_usage
+//usage: "[-q] <[-dn] DIR | -x DEVICE>"
+//usage:#define mountpoint_full_usage "\n\n"
+//usage: "Check if the directory is a mountpoint\n"
+//usage: "\n -q Quiet"
+//usage: "\n -d Print major/minor device number of the filesystem"
+//usage: "\n -n Print device name of the filesystem"
+//usage: "\n -x Print major/minor device number of the blockdevice"
+//usage:
+//usage:#define mountpoint_example_usage
+//usage: "$ mountpoint /proc\n"
+//usage: "/proc is not a mountpoint\n"
+//usage: "$ mountpoint /sys\n"
+//usage: "/sys is a mountpoint\n"
+
+#include "libbb.h"
+
+int mountpoint_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int mountpoint_main(int argc UNUSED_PARAM, char **argv)
+{
+ struct stat st;
+ const char *msg;
+ char *arg;
+ int rc, opt;
+
+ opt_complementary = "=1"; /* must have one argument */
+ opt = getopt32(argv, "qdxn");
+#define OPT_q (1)
+#define OPT_d (2)
+#define OPT_x (4)
+#define OPT_n (8)
+ arg = argv[optind];
+ msg = "%s";
+
+ rc = (opt & OPT_x) ? stat(arg, &st) : lstat(arg, &st);
+ if (rc != 0)
+ goto err;
+
+ if (opt & OPT_x) {
+ if (S_ISBLK(st.st_mode)) {
+ printf("%u:%u\n", major(st.st_rdev),
+ minor(st.st_rdev));
+ return EXIT_SUCCESS;
+ }
+ errno = 0; /* make perror_msg work as error_msg */
+ msg = "%s: not a block device";
+ goto err;
+ }
+
+ errno = ENOTDIR;
+ if (S_ISDIR(st.st_mode)) {
+ dev_t st_dev = st.st_dev;
+ ino_t st_ino = st.st_ino;
+ char *p = xasprintf("%s/..", arg);
+
+ if (stat(p, &st) == 0) {
+ //int is_mnt = (st_dev != st.st_dev) || (st_dev == st.st_dev && st_ino == st.st_ino);
+ int is_not_mnt = (st_dev == st.st_dev) && (st_ino != st.st_ino);
+
+ if (opt & OPT_d)
+ printf("%u:%u\n", major(st_dev), minor(st_dev));
+ if (opt & OPT_n) {
+ const char *d = find_block_device(arg);
+ /* name is undefined, but device is mounted -> anonymous superblock! */
+ /* happens with btrfs */
+ if (!d) {
+ d = "UNKNOWN";
+ /* TODO: iterate /proc/mounts, or /proc/self/mountinfo
+ * to find out the device name */
+ }
+ printf("%s %s\n", d, arg);
+ }
+ if (!(opt & (OPT_q | OPT_d | OPT_n)))
+ printf("%s is %sa mountpoint\n", arg, is_not_mnt ? "not " : "");
+ return is_not_mnt;
+ }
+ arg = p;
+ /* else: stat had set errno, just fall through */
+ }
+
+ err:
+ if (!(opt & OPT_q))
+ bb_perror_msg(msg, arg);
+ return EXIT_FAILURE;
+}
--- /dev/null
+/* vi: set sw=4 ts=4: */
+/*
+ * setsid.c -- execute a command in a new session
+ * Rick Sladkey <jrs@world.std.com>
+ * In the public domain.
+ *
+ * 1999-02-22 Arkadiusz Mickiewicz <misiek@pld.ORG.PL>
+ * - added Native Language Support
+ *
+ * 2001-01-18 John Fremlin <vii@penguinpowered.com>
+ * - fork in case we are process group leader
+ *
+ * 2004-11-12 Paul Fox
+ * - busyboxed
+ */
+//config:config SETSID
+//config: bool "setsid"
+//config: default y
+//config: help
+//config: setsid runs a program in a new session
+
+//applet:IF_SETSID(APPLET(setsid, BB_DIR_USR_BIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_SETSID) += setsid.o
+
+//usage:#define setsid_trivial_usage
+//usage: "[-c] PROG ARGS"
+//usage:#define setsid_full_usage "\n\n"
+//usage: "Run PROG in a new session. PROG will have no controlling terminal\n"
+//usage: "and will not be affected by keyboard signals (^C etc).\n"
+//usage: "\n -c Set controlling terminal to stdin"
+
+#include "libbb.h"
+
+int setsid_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int setsid_main(int argc UNUSED_PARAM, char **argv)
+{
+ unsigned opt;
+
+ opt_complementary = "-1"; /* at least one arg */
+ opt = getopt32(argv, "+c"); /* +: stop on first non-opt */
+ argv += optind;
+
+ /* setsid() is allowed only when we are not a process group leader.
+ * Otherwise our PID serves as PGID of some existing process group
+ * and cannot be used as PGID of a new process group.
+ *
+ * Example: setsid() below fails when run alone in interactive shell:
+ * $ setsid PROG
+ * because shell's child (setsid) is put in a new process group.
+ * But doesn't fail if shell is not interactive
+ * (and therefore doesn't create process groups for pipes),
+ * or if setsid is not the first process in the process group:
+ * $ true | setsid PROG
+ * or if setsid is executed in backquotes (`setsid PROG`)...
+ */
+ if (setsid() < 0) {
+ pid_t pid = fork_or_rexec(argv);
+ if (pid != 0) {
+ /* parent */
+ /* TODO:
+ * we can waitpid(pid, &status, 0) and then even
+ * emulate exitcode, making the behavior consistent
+ * in both forked and non forked cases.
+ * However, the code is larger and upstream
+ * does not do such trick.
+ */
+ return EXIT_SUCCESS;
+ }
+
+ /* child */
+ /* now there should be no error: */
+ setsid();
+ }
+
+ if (opt) {
+ /* -c: set (with stealing) controlling tty */
+ ioctl(0, TIOCSCTTY, 1);
+ }
+
+ BB_EXECVP_or_die(argv);
+}
--- /dev/null
+/* vi: set sw=4 ts=4: */
+/*
+ * taskset - retrieve or set a processes' CPU affinity
+ * Copyright (c) 2006 Bernhard Reutner-Fischer
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
+
+//config:config TASKSET
+//config: bool "taskset"
+//config: default y
+//config: help
+//config: Retrieve or set a processes's CPU affinity.
+//config: This requires sched_{g,s}etaffinity support in your libc.
+//config:
+//config:config FEATURE_TASKSET_FANCY
+//config: bool "Fancy output"
+//config: default y
+//config: depends on TASKSET
+//config: help
+//config: Needed for machines with more than 32-64 CPUs:
+//config: affinity parameter 0xHHHHHHHHHHHHHHHHHHHH can be arbitrarily long
+//config: in this case. Otherwise, it is limited to sizeof(long).
+
+//applet:IF_TASKSET(APPLET(taskset, BB_DIR_USR_BIN, BB_SUID_DROP))
+//kbuild:lib-$(CONFIG_TASKSET) += taskset.o
+
+//usage:#define taskset_trivial_usage
+//usage: "[-p] [HEXMASK] PID | PROG ARGS"
+//usage:#define taskset_full_usage "\n\n"
+//usage: "Set or get CPU affinity\n"
+//usage: "\n -p Operate on an existing PID"
+//usage:
+//usage:#define taskset_example_usage
+//usage: "$ taskset 0x7 ./dgemm_test&\n"
+//usage: "$ taskset -p 0x1 $!\n"
+//usage: "pid 4790's current affinity mask: 7\n"
+//usage: "pid 4790's new affinity mask: 1\n"
+//usage: "$ taskset 0x7 /bin/sh -c './taskset -p 0x1 $$'\n"
+//usage: "pid 6671's current affinity mask: 1\n"
+//usage: "pid 6671's new affinity mask: 1\n"
+//usage: "$ taskset -p 1\n"
+//usage: "pid 1's current affinity mask: 3\n"
+/*
+ * Not yet implemented:
+ * -a/--all-tasks (affect all threads)
+ * needs to get TIDs from /proc/PID/task/ and use _them_ as "pid" in sched_setaffinity(pid)
+ * -c/--cpu-list (specify CPUs via "1,3,5-7")
+ */
+
+#include <sched.h>
+#include "libbb.h"
+
+typedef unsigned long ul;
+#define SZOF_UL (unsigned)(sizeof(ul))
+#define BITS_UL (unsigned)(sizeof(ul)*8)
+#define MASK_UL (unsigned)(sizeof(ul)*8 - 1)
+
+#if ENABLE_FEATURE_TASKSET_FANCY
+#define TASKSET_PRINTF_MASK "%s"
+/* craft a string from the mask */
+static char *from_mask(const ul *mask, unsigned sz_in_bytes)
+{
+ char *str = xzalloc((sz_in_bytes+1) * 2); /* we will leak it */
+ char *p = str;
+ for (;;) {
+ ul v = *mask++;
+ if (SZOF_UL == 4)
+ p += sprintf(p, "%08lx", v);
+ if (SZOF_UL == 8)
+ p += sprintf(p, "%016lx", v);
+ if (SZOF_UL == 16)
+ p += sprintf(p, "%032lx", v); /* :) */
+ sz_in_bytes -= SZOF_UL;
+ if ((int)sz_in_bytes <= 0)
+ break;
+ }
+ while (str[0] == '0' && str[1])
+ str++;
+ return str;
+}
+#else
+#define TASKSET_PRINTF_MASK "%lx"
+static unsigned long long from_mask(ul *mask, unsigned sz_in_bytes UNUSED_PARAM)
+{
+ return *mask;
+}
+#endif
+
+static unsigned long *get_aff(int pid, unsigned *sz)
+{
+ int r;
+ unsigned long *mask = NULL;
+ unsigned sz_in_bytes = *sz;
+
+ for (;;) {
+ mask = xrealloc(mask, sz_in_bytes);
+ r = sched_getaffinity(pid, sz_in_bytes, (void*)mask);
+ if (r == 0)
+ break;
+ sz_in_bytes *= 2;
+ if (errno == EINVAL && (int)sz_in_bytes > 0)
+ continue;
+ bb_perror_msg_and_die("can't %cet pid %d's affinity", 'g', pid);
+ }
+ //bb_error_msg("get mask[0]:%lx sz_in_bytes:%d", mask[0], sz_in_bytes);
+ *sz = sz_in_bytes;
+ return mask;
+}
+
+int taskset_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int taskset_main(int argc UNUSED_PARAM, char **argv)
+{
+ ul *mask;
+ unsigned mask_size_in_bytes;
+ pid_t pid = 0;
+ unsigned opt_p;
+ const char *current_new;
+ char *aff;
+
+ /* NB: we mimic util-linux's taskset: -p does not take
+ * an argument, i.e., "-pN" is NOT valid, only "-p N"!
+ * Indeed, util-linux-2.13-pre7 uses:
+ * getopt_long(argc, argv, "+pchV", ...), not "...p:..." */
+
+ opt_complementary = "-1"; /* at least 1 arg */
+ opt_p = getopt32(argv, "+p");
+ argv += optind;
+
+ aff = *argv++;
+ if (opt_p) {
+ char *pid_str = aff;
+ if (*argv) { /* "-p <aff> <pid> ...rest.is.ignored..." */
+ pid_str = *argv; /* NB: *argv != NULL in this case */
+ }
+ /* else it was just "-p <pid>", and *argv == NULL */
+ pid = xatoul_range(pid_str, 1, ((unsigned)(pid_t)ULONG_MAX) >> 1);
+ } else {
+ /* <aff> <cmd...> */
+ if (!*argv)
+ bb_show_usage();
+ }
+
+ mask_size_in_bytes = SZOF_UL;
+ current_new = "current";
+ print_aff:
+ mask = get_aff(pid, &mask_size_in_bytes);
+ if (opt_p) {
+ printf("pid %d's %s affinity mask: "TASKSET_PRINTF_MASK"\n",
+ pid, current_new, from_mask(mask, mask_size_in_bytes));
+ if (*argv == NULL) {
+ /* Either it was just "-p <pid>",
+ * or it was "-p <aff> <pid>" and we came here
+ * for the second time (see goto below) */
+ return EXIT_SUCCESS;
+ }
+ *argv = NULL;
+ current_new = "new";
+ }
+ memset(mask, 0, mask_size_in_bytes);
+
+ /* Affinity was specified, translate it into mask */
+ /* it is always in hex, skip "0x" if it exists */
+ if (aff[0] == '0' && (aff[1]|0x20) == 'x')
+ aff += 2;
+
+ if (!ENABLE_FEATURE_TASKSET_FANCY) {
+ mask[0] = xstrtoul(aff, 16);
+ } else {
+ unsigned i;
+ char *last_char;
+
+ i = 0; /* bit pos in mask[] */
+
+ /* aff is ASCII hex string, accept very long masks in this form.
+ * Process hex string AABBCCDD... to ulong mask[]
+ * from the rightmost nibble, which is least-significant.
+ * Bits not fitting into mask[] are ignored: (example: 1234
+ * in 12340000000000000000000000000000000000000ff)
+ */
+ last_char = strchrnul(aff, '\0');
+ while (last_char > aff) {
+ char c;
+ ul val;
+
+ last_char--;
+ c = *last_char;
+ if (isdigit(c))
+ val = c - '0';
+ else if ((c|0x20) >= 'a' && (c|0x20) <= 'f')
+ val = (c|0x20) - ('a' - 10);
+ else
+ bb_error_msg_and_die("bad affinity '%s'", aff);
+
+ if (i < mask_size_in_bytes * 8) {
+ mask[i / BITS_UL] |= val << (i & MASK_UL);
+ //bb_error_msg("bit %d set", i);
+ }
+ /* else:
+ * We can error out here, but we don't.
+ * For one, kernel itself ignores bits in mask[]
+ * which do not map to any CPUs:
+ * if mask[] has one 32-bit long element,
+ * but you have only 8 CPUs, all bits beyond first 8
+ * are ignored, silently.
+ * No point in making bits past 31th to be errors.
+ */
+ i += 4;
+ }
+ }
+
+ /* Set pid's or our own (pid==0) affinity */
+ if (sched_setaffinity(pid, mask_size_in_bytes, (void*)mask))
+ bb_perror_msg_and_die("can't %cet pid %d's affinity", 's', pid);
+ //bb_error_msg("set mask[0]:%lx", mask[0]);
+
+ if (!argv[0]) /* "-p <aff> <pid> [...ignored...]" */
+ goto print_aff; /* print new affinity and exit */
+
+ BB_EXECVP_or_die(argv);
+}
--- /dev/null
+/* vi: set sw=4 ts=4: */
+/*
+ * wall - write a message to all logged-in users
+ * Copyright (c) 2009 Bernhard Reutner-Fischer
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
+
+//config:config WALL
+//config: bool "wall"
+//config: default y
+//config: depends on FEATURE_UTMP
+//config: help
+//config: Write a message to all users that are logged in.
+
+/* Needs to be run by root or be suid root - needs to write to /dev/TTY: */
+//applet:IF_WALL(APPLET(wall, BB_DIR_USR_BIN, BB_SUID_REQUIRE))
+
+//kbuild:lib-$(CONFIG_WALL) += wall.o
+
+//usage:#define wall_trivial_usage
+//usage: "[FILE]"
+//usage:#define wall_full_usage "\n\n"
+//usage: "Write content of FILE or stdin to all logged-in users"
+//usage:
+//usage:#define wall_sample_usage
+//usage: "echo foo | wall\n"
+//usage: "wall ./mymessage"
+
+#include "libbb.h"
+
+int wall_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int wall_main(int argc UNUSED_PARAM, char **argv)
+{
+ struct utmpx *ut;
+ char *msg;
+ int fd;
+
+ fd = STDIN_FILENO;
+ if (argv[1]) {
+ /* The applet is setuid.
+ * Access to the file must be under user's uid/gid.
+ */
+ fd = xopen_as_uid_gid(argv[1], O_RDONLY, getuid(), getgid());
+ }
+ msg = xmalloc_read(fd, NULL);
+ if (ENABLE_FEATURE_CLEAN_UP && argv[1])
+ close(fd);
+ setutxent();
+ while ((ut = getutxent()) != NULL) {
+ char *line;
+ if (ut->ut_type != USER_PROCESS)
+ continue;
+ line = concat_path_file("/dev", ut->ut_line);
+ xopen_xwrite_close(line, msg);
+ free(line);
+ }
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ endutxent();
+ free(msg);
+ }
+ return EXIT_SUCCESS;
+}
projects / oweals / busybox.git / commitdiff