103 lines
2.2 KiB
C
103 lines
2.2 KiB
C
/* $Id$ */
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/* Copyright (c) 2009 Pierre Pronchery <khorben@defora.org> */
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/* This file is part of DeforaOS Unix utils */
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/* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 3 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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/* renice */
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static int _renice_error(char const * message, int ret);
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static int _renice(int nice, int type, int argc, char * argv[])
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{
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int i;
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int ret = 0;
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int id;
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char * p;
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for(i = 0; i < argc; i++)
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{
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id = strtol(argv[i], &p, 10);
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if(argv[i][0] == '\0' || *p != '\0')
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{
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fprintf(stderr, "%s%s%s", "renice: ", argv[i],
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"Invalid ID\n");
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ret |= 1;
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continue;
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}
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if(setpriority(type, id, nice) != 0)
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ret |= _renice_error(argv[i], 1);
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}
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return ret;
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}
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static int _renice_error(char const * message, int ret)
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{
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fputs("renice: ", stderr);
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perror(message);
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return ret;
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}
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/* usage */
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static int _usage(void)
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{
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fputs("Usage: renice -n increment [-g | -p | -u] ID...\n\
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-n Priority to set\n\
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-g Process group IDs\n\
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-p Integer process IDs\n\
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-u User IDs\n", stderr);
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return 1;
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}
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/* main */
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int main(int argc, char * argv[])
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{
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int nice = 0;
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int type = PRIO_PROCESS;
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int o;
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char * p;
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while((o = getopt(argc, argv, "n:gpu")) != -1)
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switch(o)
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{
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case 'n':
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nice = strtol(optarg, &p, 10);
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if(*optarg == '\0' || *p != '\0')
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return _usage();
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break;
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case 'g':
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type = PRIO_PGRP;
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break;
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case 'p':
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type = PRIO_PROCESS;
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break;
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case 'u':
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type = PRIO_USER;
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break;
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default:
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return _usage();
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}
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if(argc - optind < 1)
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return _usage();
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return (_renice(nice, type, argc - optind, &argv[optind]) == 0) ? 0 : 2;
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}
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