/* $OpenBSD: renice.c,v 1.11 2003/07/10 00:06:51 david Exp $ */ /* * 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. 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. */ #ifndef lint static char copyright[] = "@(#) Copyright (c) 1983, 1989, 1993\n\ The Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #ifndef lint #if 0 static char sccsid[] = "@(#)renice.c 8.1 (Berkeley) 6/9/93"; #else static char rcsid[] = "$OpenBSD: renice.c,v 1.11 2003/07/10 00:06:51 david Exp $"; #endif #endif /* not lint */ #include #include #include #include #include #include #include #include #include int main(int, char **); int donice(int, uid_t, int); void usage(void); /* * 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 errs = 0; long prio, who = 0; char *ep; argc--, argv++; if (argc < 2) usage(); prio = strtol(*argv, &ep, 10); if (*ep != NULL) usage(); 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) { struct passwd *pwd = getpwnam(*argv); if (pwd == NULL) { warnx("%s: unknown user", *argv); continue; } who = pwd->pw_uid; } else { who = strtol(*argv, &ep, 10); if (*ep != NULL || who < 0) { warnx("%s: bad value", *argv); continue; } } errs += donice(which, (uid_t)who, (int)prio); } exit(errs != 0); } int donice(int which, uid_t who, int prio) { int oldprio; errno = 0, oldprio = getpriority(which, who); if (oldprio == -1 && errno) { warn("getpriority: %d", who); return (1); } if (setpriority(which, who, prio) < 0) { warn("setpriority: %d", who); return (1); } printf("%d: old priority %d, new priority %d\n", who, oldprio, prio); return (0); } void usage(void) { extern char *__progname; fprintf(stderr, "usage: %s priority [[-p] pid ...] [[-g] pgrp ...] " "[[-u] user ...]\n", __progname); exit(1); }