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/* vi: set sw=4 ts=4: */
/*
* Mini ps implementation(s) for busybox
*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
*
* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
*/
#include "busybox.h"
#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>
#if ENABLE_SELINUX
#include <selinux/selinux.h> /* for is_selinux_enabled() */
#endif
int ps_main(int argc, char **argv)
{
procps_status_t * p;
int i, len;
#if ENABLE_SELINUX
int use_selinux = 0;
security_context_t sid=NULL;
#endif
#if ENABLE_FEATURE_PS_WIDE
int terminal_width;
int w_count = 0;
bb_opt_complementally="-:ww";
#else
# define terminal_width 79
#endif
#if ENABLE_FEATURE_PS_WIDE || ENABLE_SELINUX
/* handle arguments */
#if ENABLE_FEATURE_PS_WIDE && ENABLE_SELINUX
i = bb_getopt_ulflags(argc, argv, "wc", &w_count);
#elif ENABLE_FEATURE_PS_WIDE && !ENABLE_SELINUX
bb_getopt_ulflags(argc, argv, "w", &w_count);
#else /* !ENABLE_FEATURE_PS_WIDE && ENABLE_SELINUX */
i = bb_getopt_ulflags(argc, argv, "c");
#endif
#if ENABLE_FEATURE_PS_WIDE
/* if w is given once, GNU ps sets the width to 132,
* if w is given more than once, it is "unlimited"
*/
if(w_count) {
terminal_width = (w_count==1) ? 132 : INT_MAX;
} else {
get_terminal_width_height(1, &terminal_width, NULL);
/* Go one less... */
terminal_width--;
}
#endif
#if ENABLE_SELINUX
if ((i & (1+ENABLE_FEATURE_PS_WIDE)) && is_selinux_enabled())
use_selinux = 1;
#endif
#endif /* ENABLE_FEATURE_PS_WIDE || ENABLE_SELINUX */
#if ENABLE_SELINUX
if (use_selinux)
printf(" PID Context Stat Command\n");
else
#endif
printf(" PID Uid VmSize Stat Command\n");
while ((p = procps_scan(1)) != 0) {
char *namecmd = p->cmd;
#if ENABLE_SELINUX
if (use_selinux)
{
char sbuf[128];
len = sizeof(sbuf);
if (is_selinux_enabled()) {
if (getpidcon(p->pid,&sid)<0)
sid=NULL;
}
if (sid) {
/* I assume sid initilized with NULL */
len = strlen(sid)+1;
safe_strncpy(sbuf, sid, len);
freecon(sid);
sid=NULL;
}else {
safe_strncpy(sbuf, "unknown",7);
}
len = printf("%5d %-32s %s ", p->pid, sbuf, p->state);
}
else
#endif
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 && namecmd[0]) {
if(i < 0)
i = 0;
if(strlen(namecmd) > (size_t)i)
namecmd[i] = 0;
printf("%s\n", namecmd);
} else {
namecmd = p->short_cmd;
if(i < 2)
i = 2;
if(strlen(namecmd) > ((size_t)i-2))
namecmd[i-2] = 0;
printf("[%s]\n", namecmd);
}
/* no check needed, but to make valgrind happy.. */
if (ENABLE_FEATURE_CLEAN_UP && p->cmd)
free(p->cmd);
}
return EXIT_SUCCESS;
}
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