/*
* Mini ps implementation(s) for busybox
*
- * Copyright (C) 1999,2000 by Lineo, inc. Written by Erik Andersen
- * <andersen@lineo.com>, <andersee@debian.org>
- *
- *
- * This contains _two_ implementations of ps for Linux. One uses the
- * traditional /proc virtual filesystem, and the other use the devps kernel
- * driver (written by Erik Andersen to avoid using /proc thereby saving 100k+).
- *
- *
+ * Copyright (C) 1999,2000 by Lineo, inc. and Erik Andersen
+ * Copyright (C) 1999,2000,2001 by Erik Andersen <andersee@debian.org>
*
* 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
* 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
- *
*/
-#include "internal.h"
+/*
+ * This contains _two_ implementations of ps for Linux. One uses the
+ * traditional /proc virtual filesystem, and the other use the devps kernel
+ * driver (written by Erik Andersen to avoid using /proc thereby saving 100k+).
+ */
+
#include <stdio.h>
+#include <stdlib.h>
#include <unistd.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <ctype.h>
+#include <string.h>
+#include <termios.h>
#include <sys/ioctl.h>
+#include "busybox.h"
+static const int TERMINAL_WIDTH = 79; /* not 80 in case terminal has linefold bug */
-#if ! defined BB_FEATURE_USE_DEVPS_PATCH
-
-/* The following is the first ps implementation --
- * the one using the /proc virtual filesystem.
- */
-
-#if ! defined BB_FEATURE_USE_PROCFS
-#error Sorry, I depend on the /proc filesystem right now.
-#endif
-
-typedef struct proc_s {
- char
- cmd[16]; /* basename of executable file in call to exec(2) */
- int
- ruid, rgid, /* real only (sorry) */
- pid, /* process id */
- ppid; /* pid of parent process */
- char
- state; /* single-char code for process state (S=sleeping) */
-} proc_t;
-
-
-
-static int file2str(char *filename, char *ret, int cap)
-{
- int fd, num_read;
-
- if ((fd = open(filename, O_RDONLY, 0)) == -1)
- return -1;
- if ((num_read = read(fd, ret, cap - 1)) <= 0)
- return -1;
- ret[num_read] = 0;
- close(fd);
- return num_read;
-}
-
-
-static void parse_proc_status(char *S, proc_t * P)
-{
- char *tmp;
-
- memset(P->cmd, 0, sizeof P->cmd);
- sscanf(S, "Name:\t%15c", P->cmd);
- tmp = strchr(P->cmd, '\n');
- if (tmp)
- *tmp = '\0';
- tmp = strstr(S, "State");
- sscanf(tmp, "State:\t%c", &P->state);
-
- tmp = strstr(S, "Pid:");
- if (tmp)
- sscanf(tmp, "Pid:\t%d\n" "PPid:\t%d\n", &P->pid, &P->ppid);
- else
- fprintf(stderr, "Internal error!\n");
-
- /* For busybox, ignoring effective, saved, etc */
- tmp = strstr(S, "Uid:");
- if (tmp)
- sscanf(tmp, "Uid:\t%d", &P->ruid);
- else
- fprintf(stderr, "Internal error!\n");
-
- tmp = strstr(S, "Gid:");
- if (tmp)
- sscanf(tmp, "Gid:\t%d", &P->rgid);
- else
- fprintf(stderr, "Internal error!\n");
-}
+#if ! defined CONFIG_FEATURE_USE_DEVPS_PATCH
extern int ps_main(int argc, char **argv)
{
- proc_t p;
- DIR *dir;
- FILE *file;
- struct dirent *entry;
- char path[32], sbuf[512];
- char uidName[10] = "";
- char groupName[10] = "";
- int len, i, c;
-#ifdef BB_FEATURE_AUTOWIDTH
- struct winsize win = { 0, 0 };
- int terminal_width = 0;
+ procps_status_t * p;
+ int i, len;
+#ifdef CONFIG_FEATURE_AUTOWIDTH
+ struct winsize win = { 0, 0, 0, 0 };
+ int terminal_width = TERMINAL_WIDTH;
#else
-#define terminal_width 79
+#define terminal_width TERMINAL_WIDTH
#endif
-
- if (argc > 1 && **(argv + 1) == '-')
- usage ("ps\n\nReport process status\n\nThis version of ps accepts no options.\n");
-
- dir = opendir("/proc");
- if (!dir)
- fatalError("Can't open /proc");
-
-#ifdef BB_FEATURE_AUTOWIDTH
+#ifdef CONFIG_FEATURE_AUTOWIDTH
ioctl(fileno(stdout), TIOCGWINSZ, &win);
if (win.ws_col > 0)
terminal_width = win.ws_col - 1;
#endif
- fprintf(stdout, "%5s %-8s %-3s %5s %s\n", "PID", "Uid", "Gid",
- "State", "Command");
- while ((entry = readdir(dir)) != NULL) {
- uidName[0] = '\0';
- groupName[0] = '\0';
-
- if (!isdigit(*entry->d_name))
- continue;
- sprintf(path, "/proc/%s/status", entry->d_name);
- if ((file2str(path, sbuf, sizeof sbuf)) != -1) {
- parse_proc_status(sbuf, &p);
- }
+ printf(" PID Uid VmSize Stat Command\n");
+ while ((p = procps_scan(1)) != 0) {
+ char *namecmd = p->cmd;
- /* Make some adjustments as needed */
- my_getpwuid(uidName, p.ruid);
- if (*uidName == '\0')
- sprintf(uidName, "%d", p.ruid);
- my_getgrgid(groupName, p.rgid);
- if (*groupName == '\0')
- sprintf(groupName, "%d", p.rgid);
-
- len = fprintf(stdout, "%5d %-8s %-8s %c ", p.pid, uidName, groupName,
- p.state);
- sprintf(path, "/proc/%s/cmdline", entry->d_name);
- file = fopen(path, "r");
- if (file == NULL)
- fatalError("Can't open %s: %s\n", path, strerror(errno));
+ if(p->rss == 0)
+ len = printf("%5d %-8s %s ", p->pid, p->user, p->state);
+ else
+ len = printf("%5d %-8s %6ld %s ", p->pid, p->user, p->rss, p->state);
+ i = terminal_width-len;
+
+ if(namecmd != 0 && namecmd[0] != 0) {
+ if(i < 0)
i = 0;
- while (((c = getc(file)) != EOF) && (i < (terminal_width-len))) {
- i++;
- if (c == '\0')
- c = ' ';
- putc(c, stdout);
+ if(strlen(namecmd) > i)
+ namecmd[i] = 0;
+ printf("%s\n", namecmd);
+ } else {
+ namecmd = p->short_cmd;
+ if(i < 2)
+ i = 2;
+ if(strlen(namecmd) > (i-2))
+ namecmd[i-2] = 0;
+ printf("[%s]\n", namecmd);
}
- if (i == 0)
- fprintf(stdout, "[%s]", p.cmd);
- fprintf(stdout, "\n");
+ free(p->cmd);
}
- closedir(dir);
- exit(TRUE);
+ return EXIT_SUCCESS;
}
-#else /* BB_FEATURE_USE_DEVPS_PATCH */
+#else /* CONFIG_FEATURE_USE_DEVPS_PATCH */
/* The following is the second ps implementation --
* this one uses the nifty new devps kernel device.
*/
-#include <linux/devps.h>
+#include <linux/devps.h> /* For Erik's nifty devps device driver */
extern int ps_main(int argc, char **argv)
pid_t num_pids;
pid_t* pid_array = NULL;
struct pid_info info;
- char uidName[10] = "";
- char groupName[10] = "";
-#ifdef BB_FEATURE_AUTOWIDTH
- struct winsize win = { 0, 0 };
- int terminal_width = 0;
+ char uidName[9];
+#ifdef CONFIG_FEATURE_AUTOWIDTH
+ struct winsize win = { 0, 0, 0, 0 };
+ int terminal_width = TERMINAL_WIDTH;
#else
-#define terminal_width 79
+#define terminal_width TERMINAL_WIDTH
#endif
if (argc > 1 && **(argv + 1) == '-')
- usage("ps-devps\n\nReport process status\n\nThis version of ps accepts no options.\n\n");
+ show_usage();
/* open device */
fd = open(device, O_RDONLY);
if (fd < 0)
- fatalError( "open failed for `%s': %s\n", device, strerror (errno));
+ perror_msg_and_die( "open failed for `%s'", device);
/* Find out how many processes there are */
if (ioctl (fd, DEVPS_GET_NUM_PIDS, &num_pids)<0)
- fatalError( "\nDEVPS_GET_PID_LIST: %s\n", strerror (errno));
+ perror_msg_and_die( "\nDEVPS_GET_PID_LIST");
/* Allocate some memory -- grab a few extras just in case
* some new processes start up while we wait. The kernel will
* just ignore any extras if we give it too many, and will trunc.
* the list if we give it too few. */
- pid_array = (pid_t*) calloc( num_pids+10, sizeof(pid_t));
+ pid_array = (pid_t*) xcalloc( num_pids+10, sizeof(pid_t));
pid_array[0] = num_pids+10;
/* Now grab the pid list */
if (ioctl (fd, DEVPS_GET_PID_LIST, pid_array)<0)
- fatalError("\nDEVPS_GET_PID_LIST: %s\n", strerror (errno));
+ perror_msg_and_die("\nDEVPS_GET_PID_LIST");
-#ifdef BB_FEATURE_AUTOWIDTH
+#ifdef CONFIG_FEATURE_AUTOWIDTH
ioctl(fileno(stdout), TIOCGWINSZ, &win);
if (win.ws_col > 0)
terminal_width = win.ws_col - 1;
#endif
/* Print up a ps listing */
- fprintf(stdout, "%5s %-8s %-3s %5s %s\n", "PID", "Uid", "Gid",
- "State", "Command");
+ printf(" PID Uid Stat Command\n");
for (i=1; i<pid_array[0] ; i++) {
- uidName[0] = '\0';
- groupName[0] = '\0';
info.pid = pid_array[i];
if (ioctl (fd, DEVPS_GET_PID_INFO, &info)<0)
- fatalError("\nDEVPS_GET_PID_INFO: %s\n", strerror (errno));
+ perror_msg_and_die("\nDEVPS_GET_PID_INFO");
/* Make some adjustments as needed */
my_getpwuid(uidName, info.euid);
- if (*uidName == '\0')
- sprintf(uidName, "%ld", info.euid);
- my_getgrgid(groupName, info.egid);
- if (*groupName == '\0')
- sprintf(groupName, "%ld", info.egid);
-
- len = fprintf(stdout, "%5d %-8s %-8s %c ", info.pid, uidName, groupName, info.state);
+ if(p.vmsize == 0)
+ len = printf("%5d %-8s %c ", p.pid, uidName, p.state);
+ else
+ len = printf("%5d %-8s %6d %c ", p.pid, uidName, p.vmsize, p.state);
if (strlen(info.command_line) > 1) {
for( j=0; j<(sizeof(info.command_line)-1) && j < (terminal_width-len); j++) {
if (*(info.command_line+j) == '\0' && *(info.command_line+j+1) != '\0') {
}
}
*(info.command_line+j) = '\0';
- fprintf(stdout, "%s\n", info.command_line);
+ puts(info.command_line);
} else {
- fprintf(stdout, "[%s]\n", info.name);
+ printf("[%s]\n", info.name);
}
}
/* close device */
if (close (fd) != 0)
- fatalError("close failed for `%s': %s\n", device, strerror (errno));
+ perror_msg_and_die("close failed for `%s'", device);
exit (0);
}
-#endif /* BB_FEATURE_USE_DEVPS_PATCH */
+#endif /* CONFIG_FEATURE_USE_DEVPS_PATCH */
projects / oweals / busybox.git / blobdiff