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/*
* Copyright (c) 1983, 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <stdio.h>
#include <pwd.h>
#include <stdlib.h>
int donice(int,int,int);
/*
* Change the priority (nice) of processes
* or groups of processes which are already
* running.
*/
int
main(int argc, char **argv)
{
int which = PRIO_PROCESS;
int who = 0, prio, errs = 0;
argc--, argv++;
if (argc < 2) {
fprintf(stderr, "usage: renice priority [ [ -p ] pids ] ");
fprintf(stderr, "[ [ -g ] pgrps ] [ [ -u ] users ]\n");
exit(1);
}
prio = atoi(*argv);
argc--, argv++;
if (prio > PRIO_MAX)
prio = PRIO_MAX;
if (prio < PRIO_MIN)
prio = PRIO_MIN;
for (; argc > 0; argc--, argv++) {
if (strcmp(*argv, "-g") == 0) {
which = PRIO_PGRP;
continue;
}
if (strcmp(*argv, "-u") == 0) {
which = PRIO_USER;
continue;
}
if (strcmp(*argv, "-p") == 0) {
which = PRIO_PROCESS;
continue;
}
if (which == PRIO_USER) {
register struct passwd *pwd = getpwnam(*argv);
if (pwd == NULL) {
fprintf(stderr, "renice: %s: unknown user\n",
*argv);
continue;
}
who = pwd->pw_uid;
} else {
who = atoi(*argv);
if (who < 0) {
fprintf(stderr, "renice: %s: bad value\n",
*argv);
continue;
}
}
errs += donice(which, who, prio);
}
return (errs != 0);
}
int
donice(which, who, prio)
int which, who, prio;
{
int oldprio;
extern int errno;
errno = 0, oldprio = getpriority(which, who);
if (oldprio == -1 && errno) {
fprintf(stderr, "renice: %d: ", who);
perror("getpriority");
return (1);
}
if (setpriority(which, who, prio) < 0) {
fprintf(stderr, "renice: %d: ", who);
perror("setpriority");
return (1);
}
printf("%d: old priority %d, new priority %d\n", who, oldprio, prio);
return (0);
}
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