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/* vi: set sw=4 ts=4: */
/*
* Utility routines.
*
* Copyright 1998 by Albert Cahalan; all rights reserved.
* Copyright (C) 2002 by Vladimir Oleynik <dzo@simtreas.ru>
* GNU Library General Public License Version 2, or any later version
*
*/
#include <dirent.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <asm/page.h>
#include "libbb.h"
#ifndef
#define PAGE_MASK (~((getpagesize())-1))
#endif
extern procps_status_t * procps_scan(int save_user_arg0
#ifdef CONFIG_SELINUX
, int use_selinux , security_id_t *sid
#endif
)
{
static DIR *dir;
struct dirent *entry;
static procps_status_t ret_status;
char *name;
int n;
char status[32];
char buf[1024];
FILE *fp;
procps_status_t curstatus;
int pid;
long tasknice;
struct stat sb;
if (!dir) {
dir = opendir("/proc");
if(!dir)
bb_error_msg_and_die("Can't open /proc");
}
for(;;) {
if((entry = readdir(dir)) == NULL) {
closedir(dir);
dir = 0;
return 0;
}
name = entry->d_name;
if (!(*name >= '0' && *name <= '9'))
continue;
memset(&curstatus, 0, sizeof(procps_status_t));
pid = atoi(name);
curstatus.pid = pid;
sprintf(status, "/proc/%d/stat", pid);
if((fp = fopen(status, "r")) == NULL)
continue;
#ifdef CONFIG_SELINUX
if(use_selinux)
{
if(fstat_secure(fileno(fp), &sb, sid))
continue;
}
else
#endif
if(fstat(fileno(fp), &sb))
continue;
my_getpwuid(curstatus.user, sb.st_uid);
name = fgets(buf, sizeof(buf), fp);
fclose(fp);
if(name == NULL)
continue;
name = strrchr(buf, ')'); /* split into "PID (cmd" and "<rest>" */
if(name == 0 || name[1] != ' ')
continue;
*name = 0;
sscanf(buf, "%*s (%15c", curstatus.short_cmd);
n = sscanf(name+2,
"%c %d "
"%*s %*s %*s %*s " /* pgrp, session, tty, tpgid */
"%*s %*s %*s %*s %*s " /* flags, min_flt, cmin_flt, maj_flt, cmaj_flt */
#ifdef FEATURE_CPU_USAGE_PERCENTAGE
"%lu %lu "
#else
"%*s %*s "
#endif
"%*s %*s %*s " /* cutime, cstime, priority */
"%ld "
"%*s %*s %*s " /* timeout, it_real_value, start_time */
"%*s " /* vsize */
"%ld",
curstatus.state, &curstatus.ppid,
#ifdef FEATURE_CPU_USAGE_PERCENTAGE
&curstatus.utime, &curstatus.stime,
#endif
&tasknice,
&curstatus.rss);
#ifdef FEATURE_CPU_USAGE_PERCENTAGE
if(n != 6)
#else
if(n != 4)
#endif
continue;
if (curstatus.rss == 0 && curstatus.state[0] != 'Z')
curstatus.state[1] = 'W';
else
curstatus.state[1] = ' ';
if (tasknice < 0)
curstatus.state[2] = '<';
else if (tasknice > 0)
curstatus.state[2] = 'N';
else
curstatus.state[2] = ' ';
curstatus.rss <<= (PAGE_SHIFT - 10); /* 2**10 = 1kb */
if(save_user_arg0) {
sprintf(status, "/proc/%d/cmdline", pid);
if((fp = fopen(status, "r")) == NULL)
continue;
if((n=fread(buf, 1, sizeof(buf)-1, fp)) > 0) {
if(buf[n-1]=='\n')
buf[--n] = 0;
name = buf;
while(n) {
if(((unsigned char)*name) < ' ')
*name = ' ';
name++;
n--;
}
*name = 0;
if(buf[0])
curstatus.cmd = strdup(buf);
/* if NULL it work true also */
}
fclose(fp);
}
return memcpy(&ret_status, &curstatus, sizeof(procps_status_t));
}
}
/* END CODE */
/*
Local Variables:
c-file-style: "linux"
c-basic-offset: 4
tab-width: 4
End:
*/
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