mirror of
git://git.suckless.org/sbase
synced 2024-12-27 17:42:29 +00:00
166bc3052e
Some systems do not define NZERO. NZERO seems to be an XSI extension
and PRIO_{MIN,MAX} is not specified by POSIX but most relevant systems
define it.
50 lines
920 B
C
50 lines
920 B
C
/* See LICENSE file for copyright and license details. */
|
|
#include <errno.h>
|
|
#include <limits.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <sys/resource.h>
|
|
#include <sys/time.h>
|
|
#include <unistd.h>
|
|
|
|
#include "util.h"
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
eprintf("usage: nice [-n inc] command [options ...]\n");
|
|
}
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
long val = 10;
|
|
int savederrno;
|
|
|
|
ARGBEGIN {
|
|
case 'n':
|
|
val = estrtol(EARGF(usage()), 10);
|
|
break;
|
|
default:
|
|
usage();
|
|
break;
|
|
} ARGEND;
|
|
|
|
if (argc == 0)
|
|
usage();
|
|
|
|
errno = 0;
|
|
val += getpriority(PRIO_PROCESS, 0);
|
|
if (errno != 0)
|
|
weprintf("getpriority:");
|
|
val = MAX(PRIO_MIN, MIN(val, PRIO_MAX));
|
|
if (setpriority(PRIO_PROCESS, 0, val) != 0)
|
|
weprintf("setpriority:");
|
|
|
|
/* POSIX specifies the nice failure still invokes the command */
|
|
execvp(argv[0], argv);
|
|
savederrno = errno;
|
|
weprintf("execvp %s:", argv[0]);
|
|
return (savederrno == ENOENT)? 127 : 126;
|
|
}
|