/* vi: set sw=4 ts=4: */
-/*----------------------------------------------------------------------
+/*
* Mini who is used to display user name, login time,
* idle time and host name.
*
*
* Copyright (c) 2002 AYR Networks, Inc.
*
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
- *
- *----------------------------------------------------------------------
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
+//config:config WHO
+//config: bool "who (3.7 kb)"
+//config: default y
+//config: depends on FEATURE_UTMP
+//config: help
+//config: Print users currently logged on.
+//config:
+// procps-ng has this variation of "who":
+//config:config W
+//config: bool "w (3.7 kb)"
+//config: default y
+//config: depends on FEATURE_UTMP
+//config: help
+//config: Print users currently logged on.
+//config:
+//config:config USERS
+//config: bool "users (3.2 kb)"
+//config: default y
+//config: depends on FEATURE_UTMP
+//config: help
+//config: Print users currently logged on.
+
+// APPLET_NOEXEC:name main location suid_type help
+//applet:IF_USERS(APPLET_NOEXEC(users, who, BB_DIR_USR_BIN, BB_SUID_DROP, users))
+//applet:IF_W( APPLET_NOEXEC(w, who, BB_DIR_USR_BIN, BB_SUID_DROP, w))
+//applet:IF_WHO( APPLET_NOEXEC(who, who, BB_DIR_USR_BIN, BB_SUID_DROP, who))
+
+//kbuild:lib-$(CONFIG_USERS) += who.o
+//kbuild:lib-$(CONFIG_W) += who.o
+//kbuild:lib-$(CONFIG_WHO) += who.o
+
+/* BB_AUDIT SUSv3 _NOT_ compliant -- missing options -b, -d, -l, -m, -p, -q, -r, -s, -t, -T, -u; Missing argument 'file'. */
+
+//usage:#define users_trivial_usage
+//usage: ""
+//usage:#define users_full_usage "\n\n"
+//usage: "Print the users currently logged on"
-#include "busybox.h"
-#include <utmp.h>
-#include <time.h>
+//usage:#define w_trivial_usage
+//usage: ""
+//usage:#define w_full_usage "\n\n"
+//usage: "Show who is logged on"
+//
+// procps-ng 3.3.10:
+// "\n -h, --no-header"
+// "\n -u, --no-current"
+// Ignores the username while figuring out the current process
+// and cpu times. To demonstrate this, do a "su" and do a "w" and a "w -u".
+// "\n -s, --short"
+// Short format. Don't print the login time, JCPU or PCPU times.
+// "\n -f, --from"
+// Toggle printing the from (remote hostname) field.
+// The default is for the from field to not be printed
+// "\n -i, --ip-addr"
+// Display IP address instead of hostname for from field.
+// "\n -o, --old-style"
+// Old style output. Prints blank space for idle times less than one minute.
+// Example output:
+// 17:28:00 up 4 days, 22:41, 4 users, load average: 0.84, 0.97, 0.90
+// USER TTY LOGIN@ IDLE JCPU PCPU WHAT
+// root tty1 Thu18 4days 4:33m 0.07s /bin/sh /etc/xdg/xfce4/xinitrc -- vt
+// root pts/1 Mon13 3:24m 1:01 0.01s w
-static const char * idle_string (time_t t)
+//usage:#define who_trivial_usage
+//usage: "[-a]"
+//usage:#define who_full_usage "\n\n"
+//usage: "Show who is logged on\n"
+//usage: "\n -a Show all"
+//usage: "\n -H Print column headers"
+
+#include "libbb.h"
+
+static void idle_string(char *str6, time_t t)
{
- static char str[6];
-
- time_t s = time(NULL) - t;
+ t = time(NULL) - t;
- if (s < 60)
- return ".";
- if (s < (24 * 60 * 60)) {
- sprintf (str, "%02d:%02d",
- (int) (s / (60 * 60)),
- (int) ((s % (60 * 60)) / 60));
- return str;
+ /*if (t < 60) {
+ str6[0] = '.';
+ str6[1] = '\0';
+ return;
+ }*/
+ if (t >= 0 && t < (24 * 60 * 60)) {
+ sprintf(str6, "%02d:%02d",
+ (int) (t / (60 * 60)),
+ (int) ((t % (60 * 60)) / 60));
+ return;
}
- return "old";
+ strcpy(str6, "old");
}
-int who_main(int argc, char **argv)
+int who_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int who_main(int argc UNUSED_PARAM, char **argv)
{
- struct utmp *ut;
- struct stat st;
- char *name;
-
- if (argc > 1) {
- bb_show_usage();
- }
-
- setutent();
- printf("USER TTY IDLE TIME HOST\n");
- while ((ut = getutent()) != NULL) {
- if (ut->ut_user[0] && ut->ut_type == USER_PROCESS) {
- time_t thyme = ut->ut_tv.tv_sec;
+#define CNT_APPLET (ENABLE_USERS + ENABLE_W + ENABLE_WHO)
+ int do_users = (ENABLE_USERS && (CNT_APPLET == 1 || applet_name[0] == 'u'));
+ int do_w = (ENABLE_W && (CNT_APPLET == 1 || applet_name[1] == '\0'));
+ int do_who = (ENABLE_WHO && (CNT_APPLET == 1 || applet_name[1] == 'h'));
+ struct utmpx *ut;
+ unsigned opt;
+ const char *fmt = "%s";
+
+ opt = getopt32(argv, do_who ? "^" "aH" "\0" "=0": "^" "" "\0" "=0");
+ if ((opt & 2) || do_w) /* -H or we are w */
+ puts("USER\t\tTTY\t\tIDLE\tTIME\t\t HOST");
+
+ setutxent();
+ while ((ut = getutxent()) != NULL) {
+ if (ut->ut_user[0]
+ && ((opt & 1) || ut->ut_type == USER_PROCESS)
+ ) {
+ if (!do_users) {
+ char str6[6];
+ char name[sizeof("/dev/") + sizeof(ut->ut_line) + 1];
+ struct stat st;
+ time_t seconds;
- /* ut->ut_line is device name of tty - "/dev/" */
- name = concat_path_file("/dev", ut->ut_line);
- printf("%-10s %-8s %-8s %-12.12s %s\n", ut->ut_user, ut->ut_line,
- (stat(name, &st)) ? "?" : idle_string(st.st_atime),
- ctime(&thyme) + 4, ut->ut_host);
- if (ENABLE_FEATURE_CLEAN_UP) free(name);
+ str6[0] = '?';
+ str6[1] = '\0';
+ strcpy(name, "/dev/");
+ safe_strncpy(ut->ut_line[0] == '/' ? name : name + sizeof("/dev/")-1,
+ ut->ut_line,
+ sizeof(ut->ut_line)+1
+ );
+ if (stat(name, &st) == 0)
+ idle_string(str6, st.st_atime);
+ /* manpages say ut_tv.tv_sec *is* time_t,
+ * but some systems have it wrong */
+ seconds = ut->ut_tv.tv_sec;
+ /* How wide time field can be?
+ * "Nov 10 19:33:20": 15 chars
+ * "2010-11-10 19:33": 16 chars
+ */
+ printf("%-15.*s %-15.*s %-7s %-16.16s %.*s\n",
+ (int)sizeof(ut->ut_user), ut->ut_user,
+ (int)sizeof(ut->ut_line), ut->ut_line,
+ str6,
+// TODO: with LANG=en_US.UTF-8, who from coreutils 8.25 shows
+// TIME col as "2017-04-06 18:47" (the default format is "Apr 6 18:47").
+// The former format looks saner to me. Switch to it unconditionally?
+ ctime(&seconds) + 4,
+ (int)sizeof(ut->ut_host), ut->ut_host
+ );
+ } else {
+ printf(fmt, ut->ut_user);
+ fmt = " %s";
+ }
}
}
- if (ENABLE_FEATURE_CLEAN_UP) endutent();
- return 0;
+ if (do_users)
+ bb_putchar('\n');
+ if (ENABLE_FEATURE_CLEAN_UP)
+ endutxent();
+ return EXIT_SUCCESS;
}
projects / oweals / busybox.git / blobdiff