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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.
*/
/* 1999-02-22 Arkadiusz Miśkiewicz <misiek@pld.ORG.PL>
* - added Native Language Support
*/
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <stdio.h>
#include <pwd.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "nls.h"
#include "c.h"
#include "closestream.h"
static const char *idtype[] = {
[PRIO_PROCESS] = N_("process ID"),
[PRIO_PGRP] = N_("process group ID"),
[PRIO_USER] = N_("user ID"),
};
static void __attribute__((__noreturn__)) usage(void)
{
FILE *out = stdout;
fputs(USAGE_HEADER, out);
fprintf(out,
_(" %1$s [-n] <priority> [-p|--pid] <pid>...\n"
" %1$s [-n] <priority> -g|--pgrp <pgid>...\n"
" %1$s [-n] <priority> -u|--user <user>...\n"),
program_invocation_short_name);
fputs(USAGE_SEPARATOR, out);
fputs(_("Alter the priority of running processes.\n"), out);
fputs(USAGE_OPTIONS, out);
fputs(_(" -n, --priority <num> specify the nice increment value\n"), out);
fputs(_(" -p, --pid <id> interpret argument as process ID (default)\n"), out);
fputs(_(" -g, --pgrp <id> interpret argument as process group ID\n"), out);
fputs(_(" -u, --user <name>|<id> interpret argument as username or user ID\n"), out);
fputs(USAGE_SEPARATOR, out);
printf(USAGE_HELP_OPTIONS(24));
printf(USAGE_MAN_TAIL("renice(1)"));
exit(EXIT_SUCCESS);
}
static int getprio(const int which, const int who, int *prio)
{
errno = 0;
*prio = getpriority(which, who);
if (*prio == -1 && errno) {
warn(_("failed to get priority for %d (%s)"), who, idtype[which]);
return -errno;
}
return 0;
}
static int donice(const int which, const int who, const int prio)
{
int oldprio, newprio;
if (getprio(which, who, &oldprio) != 0)
return 1;
if (setpriority(which, who, prio) < 0) {
warn(_("failed to set priority for %d (%s)"), who, idtype[which]);
return 1;
}
if (getprio(which, who, &newprio) != 0)
return 1;
printf(_("%d (%s) old priority %d, new priority %d\n"),
who, idtype[which], oldprio, newprio);
return 0;
}
/*
* Change the priority (the nice value) 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;
char *endptr = NULL;
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
atexit(close_stdout);
argc--;
argv++;
if (argc == 1) {
if (strcmp(*argv, "-h") == 0 ||
strcmp(*argv, "--help") == 0)
usage();
if (strcmp(*argv, "-v") == 0 ||
strcmp(*argv, "-V") == 0 ||
strcmp(*argv, "--version") == 0) {
printf(UTIL_LINUX_VERSION);
return EXIT_SUCCESS;
}
}
if (*argv && (strcmp(*argv, "-n") == 0 || strcmp(*argv, "--priority") == 0)) {
argc--;
argv++;
}
if (argc < 2) {
warnx(_("not enough arguments"));
errtryhelp(EXIT_FAILURE);
}
prio = strtol(*argv, &endptr, 10);
if (*endptr) {
warnx(_("invalid priority '%s'"), *argv);
errtryhelp(EXIT_FAILURE);
}
argc--;
argv++;
for (; argc > 0; argc--, argv++) {
if (strcmp(*argv, "-g") == 0 || strcmp(*argv, "--pgrp") == 0) {
which = PRIO_PGRP;
continue;
}
if (strcmp(*argv, "-u") == 0 || strcmp(*argv, "--user") == 0) {
which = PRIO_USER;
continue;
}
if (strcmp(*argv, "-p") == 0 || strcmp(*argv, "--pid") == 0) {
which = PRIO_PROCESS;
continue;
}
if (which == PRIO_USER) {
struct passwd *pwd = getpwnam(*argv);
if (pwd != NULL)
who = pwd->pw_uid;
else
who = strtol(*argv, &endptr, 10);
if (who < 0 || *endptr) {
warnx(_("unknown user %s"), *argv);
errs = 1;
continue;
}
} else {
who = strtol(*argv, &endptr, 10);
if (who < 0 || *endptr) {
/* TRANSLATORS: The first %s is one of the above
* three ID names. Read: "bad value for %s: %s" */
warnx(_("bad %s value: %s"), idtype[which], *argv);
errs = 1;
continue;
}
}
errs |= donice(which, who, prio);
}
return errs != 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
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