ubase/ps.c
2013-08-15 16:50:48 +01:00

117 lines
1.9 KiB
C

/* See LICENSE file for copyright and license details. */
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include "proc.h"
#include "util.h"
static void usage(void);
static void psout(struct procstat *ps);
static void psr(const char *path);
enum {
PS_aflag = 1 << 0,
PS_Aflag = 1 << 1,
PS_dflag = 1 << 2
};
static int flags;
int
main(int argc, char *argv[])
{
ARGBEGIN {
case 'a':
flags |= PS_aflag;
break;
case 'A':
flags |= PS_Aflag;
break;
case 'd':
flags |= PS_dflag;
break;
case 'e':
flags |= PS_Aflag;
break;
case 'f':
eprintf("not implemented\n");
default:
usage();
} ARGEND;
printf(" PID TTY TIME CMD\n");
recurse("/proc", psr);
return 0;
}
static void
usage(void)
{
eprintf("usage: [-aAdef] %s\n", argv0);
}
static void
psout(struct procstat *ps)
{
char *ttystr, *myttystr;
int tty_maj, tty_min;
uid_t myeuid, peuid;
unsigned sut;
/* Ignore session leaders */
if (flags & PS_dflag)
if (ps->pid == ps->sid)
return;
sut = (ps->stime + ps->utime) / 100;
devtotty(ps->tty_nr, &tty_maj, &tty_min);
ttystr = ttytostr(tty_maj, tty_min);
/* Only print processes that are associated with
* a terminal */
if (ttystr[0] == '?' && (flags & PS_aflag)) {
free(ttystr);
return;
}
if (!flags) {
myttystr = ttyname(STDIN_FILENO);
if (myttystr) {
if (strcmp(myttystr + strlen("/dev/"), ttystr)) {
free(ttystr);
return;
}
} else {
ttystr[0] = '?';
ttystr[1] = '\0';
}
proceuid(ps->pid, &peuid);
myeuid = geteuid();
if (myeuid != peuid) {
free(ttystr);
return;
}
}
printf("%5d %-6s %02u:%02u:%02u %s\n", ps->pid, ttystr,
sut / 3600, (sut % 3600) / 60, sut % 60, ps->comm);
free(ttystr);
}
static void
psr(const char *path)
{
struct procstat ps;
pid_t pid;
if (!validps(path))
return;
pid = estrtol(path, 10);
parsestat(pid, &ps);
psout(&ps);
}