1 /* renice.c - renice process
2  *
3  * Copyright 2013 CE Strake <strake888 at gmail.com>
4  *
5  * See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/renice.html
6 
7 USE_RENICE(NEWTOY(renice, "<1gpun#|", TOYFLAG_USR|TOYFLAG_BIN))
8 
9 config RENICE
10   bool "renice"
11   default y
12   help
13     usage: renice [-gpu] -n increment ID ...
14 */
15 
16 #define FOR_renice
17 #include "toys.h"
18 
GLOBALS(long n;)19 GLOBALS(
20   long n;
21 )
22 
23 void renice_main(void) {
24   int which = (toys.optflags & FLAG_g) ? PRIO_PGRP :
25               ((toys.optflags & FLAG_u) ? PRIO_USER : PRIO_PROCESS);
26   char **arg;
27 
28   for (arg = toys.optargs; *arg; arg++) {
29     char *s = *arg;
30     int id = -1;
31 
32     if (toys.optflags & FLAG_u) {
33       struct passwd *p = getpwnam(s);
34       if (p) id = p->pw_uid;
35     } else {
36       id = strtol(s, &s, 10);
37       if (*s) id = -1;
38     }
39 
40     if (id < 0) {
41       error_msg("bad '%s'", *arg);
42       continue;
43     }
44 
45     if (setpriority(which, id, getpriority(which, id)+TT.n) < 0)
46       perror_msg("setpriority %d", id);
47   }
48 }
49