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https://github.com/sheumann/hush.git
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131 lines
2.9 KiB
C
131 lines
2.9 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini ps implementation(s) for busybox
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*
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* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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*
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* Licensed under the GPL v2, see the file LICENSE in this tarball.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <dirent.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <ctype.h>
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#include <string.h>
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#include <termios.h>
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#include <sys/ioctl.h>
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#include "busybox.h"
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#if ENABLE_SELINUX
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#include <selinux/selinux.h> /* for is_selinux_enabled() */
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#endif
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int ps_main(int argc, char **argv)
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{
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procps_status_t * p;
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int i, len;
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#if ENABLE_SELINUX
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int use_selinux = 0;
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security_context_t sid=NULL;
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#endif
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#if ENABLE_FEATURE_PS_WIDE
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int terminal_width;
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int w_count = 0;
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bb_opt_complementally="-:ww";
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#else
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# define terminal_width 79
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#endif
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#if ENABLE_FEATURE_PS_WIDE || ENABLE_SELINUX
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/* handle arguments */
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#if ENABLE_FEATURE_PS_WIDE && ENABLE_SELINUX
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i = bb_getopt_ulflags(argc, argv, "wc", &w_count);
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#elif ENABLE_FEATURE_PS_WIDE && !ENABLE_SELINUX
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bb_getopt_ulflags(argc, argv, "w", &w_count);
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#else /* !ENABLE_FEATURE_PS_WIDE && ENABLE_SELINUX */
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i = bb_getopt_ulflags(argc, argv, "c");
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#endif
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#if ENABLE_FEATURE_PS_WIDE
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/* if w is given once, GNU ps sets the width to 132,
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* if w is given more than once, it is "unlimited"
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*/
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if(w_count) {
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terminal_width = (w_count==1) ? 132 : INT_MAX;
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} else {
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get_terminal_width_height(1, &terminal_width, NULL);
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/* Go one less... */
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terminal_width--;
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}
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#endif
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#if ENABLE_SELINUX
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if ((i & (1+ENABLE_FEATURE_PS_WIDE)) && is_selinux_enabled())
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use_selinux = 1;
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#endif
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#endif /* ENABLE_FEATURE_PS_WIDE || ENABLE_SELINUX */
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#if ENABLE_SELINUX
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if (use_selinux)
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printf(" PID Context Stat Command\n");
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else
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#endif
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printf(" PID Uid VmSize Stat Command\n");
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while ((p = procps_scan(1)) != 0) {
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char *namecmd = p->cmd;
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#if ENABLE_SELINUX
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if (use_selinux)
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{
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char sbuf[128];
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len = sizeof(sbuf);
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if (is_selinux_enabled()) {
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if (getpidcon(p->pid,&sid)<0)
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sid=NULL;
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}
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if (sid) {
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/* I assume sid initilized with NULL */
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len = strlen(sid)+1;
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safe_strncpy(sbuf, sid, len);
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freecon(sid);
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sid=NULL;
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}else {
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safe_strncpy(sbuf, "unknown",7);
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}
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len = printf("%5d %-32s %s ", p->pid, sbuf, p->state);
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}
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else
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#endif
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if(p->rss == 0)
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len = printf("%5d %-8s %s ", p->pid, p->user, p->state);
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else
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len = printf("%5d %-8s %6ld %s ", p->pid, p->user, p->rss, p->state);
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i = terminal_width-len;
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if(namecmd && namecmd[0]) {
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if(i < 0)
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i = 0;
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if(strlen(namecmd) > (size_t)i)
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namecmd[i] = 0;
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printf("%s\n", namecmd);
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} else {
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namecmd = p->short_cmd;
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if(i < 2)
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i = 2;
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if(strlen(namecmd) > ((size_t)i-2))
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namecmd[i-2] = 0;
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printf("[%s]\n", namecmd);
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}
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/* no check needed, but to make valgrind happy.. */
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if (ENABLE_FEATURE_CLEAN_UP && p->cmd)
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free(p->cmd);
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}
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return EXIT_SUCCESS;
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}
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