LXR toybox/toys/posix/renice.c

   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
   7USE_RENICE(NEWTOY(renice, "<1gpun#|", TOYFLAG_USR|TOYFLAG_BIN))
   8
   9config 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
  19GLOBALS(
  20  long n;
  21)
  22
  23void 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