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annotate toys/pending/renice.c @ 977:9a96527bea94

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Add renice.
author M. Farkas-Dyck <strake888@gmail.com>
date Mon, 29 Jul 2013 21:16:55 -0500
parents
children 6d3c39cb8a9d
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977
9a96527bea94 Add renice.
M. Farkas-Dyck <strake888@gmail.com>
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1 /* renice.c - renice process
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2 *
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3 * Copyright 2013 CE Strake <strake888 at gmail.com>
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4 *
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5 * See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/
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6 * See http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/cmdbehav.html
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7
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8 USE_RENICE(NEWTOY(renice, "gpun#", TOYFLAG_BIN))
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9
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10 config RENICE
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11 bool "renice"
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12 default n
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13 help
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14 usage: renice [-gpu] -n increment ID ...
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15 */
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16
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17 #define FOR_renice
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18 #include "toys.h"
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19
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20 GLOBALS(
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21 long nArgu;
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22 )
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23
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24 void renice_main (void) {
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25 int ii;
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26 int which = toys.optflags & FLAG_g ? PRIO_PGRP :
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27 toys.optflags & FLAG_u ? PRIO_USER :
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28 PRIO_PROCESS;
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29
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30 if (!(toys.optflags & FLAG_n)) error_exit ("no increment given");
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31
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32 for (ii = 0; ii < toys.optc; ii++) {
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33 id_t id;
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34
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35 if (isdigit (toys.optargs[ii][0])) id = strtoul (toys.optargs[ii], 0, 10);
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36 else if (toys.optflags & FLAG_u) id = getpwnam (toys.optargs[ii]) -> pw_uid;
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37 else {
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38 error_msg ("not a number: %s", toys.optargs[ii]);
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39 toys.exitval = 1;
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40 continue;
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41 }
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42
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43 if (setpriority (which, id, getpriority (which, id) + TT.nArgu) < 0) {
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44 error_msg ("failed to setpriority of %d", id);
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45 toys.exitval = 1;
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46 }
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47 }
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48 }