51 lines
943 B
C
51 lines
943 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);
|
|
|
|
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(-NZERO, MIN(val, NZERO - 1));
|
|
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;
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
eprintf("usage: nice [-n inc] command [options ...]\n");
|
|
}
|