diff options
Diffstat (limited to 'usr.bin/renice/renice.c')
-rw-r--r-- | usr.bin/renice/renice.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/usr.bin/renice/renice.c b/usr.bin/renice/renice.c new file mode 100644 index 0000000..6deba6b --- /dev/null +++ b/usr.bin/renice/renice.c @@ -0,0 +1,128 @@ +/* + * 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. + */ + +#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 +static char sccsid[] = "@(#)renice.c 8.1 (Berkeley) 6/9/93"; +#endif /* not lint */ + +#include <sys/types.h> +#include <sys/time.h> +#include <sys/resource.h> + +#include <stdio.h> +#include <pwd.h> + +/* + * Change the priority (nice) of processes + * or groups of processes which are already + * running. + */ +main(argc, argv) + 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); + } + exit(errs != 0); +} + +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); +} |