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Diffstat (limited to 'sys-utils/renice.c')
| -rw-r--r-- | sys-utils/renice.c | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/sys-utils/renice.c b/sys-utils/renice.c new file mode 100644 index 0000000..3ae71f9 --- /dev/null +++ b/sys-utils/renice.c @@ -0,0 +1,196 @@ +/* + * 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; +} |