diff --git a/schedutils/taskset.c b/schedutils/taskset.c index 154268eb1..66387c827 100644 --- a/schedutils/taskset.c +++ b/schedutils/taskset.c @@ -1,14 +1,6 @@ /* - * taskset.c - taskset - * Command-line utility for setting and retrieving a task's CPU affinity - * - * Robert Love 25 April 2002 - * - * Linux kernels as of 2.5.8 provide the needed syscalls for - * working with a task's cpu affinity. Currently 2.4 does not - * support these syscalls, but patches are available at: - * - * http://www.kernel.org/pub/linux/kernel/people/rml/cpu-affinity/ + * taskset.c - command-line utility for setting and retrieving + * a task's CPU affinity * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License, v2, as @@ -24,6 +16,7 @@ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * Copyright (C) 2004 Robert Love + * Copyright (C) 2010 Karel Zak */ #include @@ -35,43 +28,48 @@ #include #include #include +#include #include "cpuset.h" +#include "nls.h" -static void show_usage(const char *cmd) +static void __attribute__((__noreturn__)) usage(FILE *out) { - fprintf(stderr, "taskset (%s)\n", PACKAGE_STRING); - fprintf(stderr, "usage: %s [options] [mask | cpu-list] [pid |"\ - " cmd [args...]]\n", cmd); - fprintf(stderr, "set or get the affinity of a process\n\n"); - fprintf(stderr, " -p, --pid " - "operate on existing given pid\n"); - fprintf(stderr, " -c, --cpu-list "\ - "display and specify cpus in list format\n"); - fprintf(stderr, " -h, --help display this help\n"); - fprintf(stderr, " -V, --version "\ - "output version information\n\n"); - fprintf(stderr, "The default behavior is to run a new command:\n"); - fprintf(stderr, " %s 03 sshd -b 1024\n", cmd); - fprintf(stderr, "You can retrieve the mask of an existing task:\n"); - fprintf(stderr, " %s -p 700\n", cmd); - fprintf(stderr, "Or set it:\n"); - fprintf(stderr, " %s -p 03 700\n", cmd); - fprintf(stderr, "List format uses a comma-separated list instead"\ - " of a mask:\n"); - fprintf(stderr, " %s -pc 0,3,7-11 700\n", cmd); - fprintf(stderr, "Ranges in list format can take a stride argument:\n"); - fprintf(stderr, " e.g. 0-31:2 is equivalent to mask 0x55555555\n\n"); + fprintf(out, + _("Usage: %s [options] [mask | cpu-list] [pid|cmd [args...]]\n\n"), + program_invocation_short_name); + + fprintf(out, _( + "Options:\n" + " -p, --pid operate on existing given pid\n" + " -c, --cpu-list display and specify cpus in list format\n" + " -h, --help display this help\n" + " -V, --version output version information\n\n")); + + fprintf(out, _( + "The default behavior is to run a new command:\n" + " %1$s 03 sshd -b 1024\n" + "You can retrieve the mask of an existing task:\n" + " %1$s -p 700\n" + "Or set it:\n" + " %1$s -p 03 700\n" + "List format uses a comma-separated list instead of a mask:\n" + " %1$s -pc 0,3,7-11 700\n" + "Ranges in list format can take a stride argument:\n" + " e.g. 0-31:2 is equivalent to mask 0x55555555\n"), + program_invocation_short_name); + + fprintf(out, _("\nFor more information see taskset(1).\n")); + + exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS); } /* * Number of bits in a CPU bitmask on current system */ -static int -max_number_of_cpus(void) +static int max_number_of_cpus(void) { - int n; - int cpus = 2048; + int n, cpus = 2048; size_t setsize; cpu_set_t *set = cpuset_alloc(cpus, &setsize, NULL); @@ -84,7 +82,7 @@ max_number_of_cpus(void) /* the library version does not return size of cpumask_t */ n = syscall(SYS_sched_getaffinity, 0, setsize, set); - if (n < 0 && errno == EINVAL && cpus < 1024*1024) { + if (n < 0 && errno == EINVAL && cpus < 1024 * 1024) { cpuset_free(set); cpus *= 2; set = cpuset_alloc(cpus, &setsize, NULL); @@ -93,12 +91,10 @@ max_number_of_cpus(void) continue; } cpuset_free(set); - return n*8; + return n * 8; } - err: - fprintf (stderr, "cannot determine NR_CPUS; aborting"); - exit(1); + errx(EXIT_FAILURE, _("cannot determine NR_CPUS; aborting")); return 0; } @@ -106,9 +102,8 @@ int main(int argc, char *argv[]) { cpu_set_t *new_set, *cur_set; pid_t pid = 0; - int opt, err; + int opt, c_opt = 0, rc; char *buf; - int c_opt = 0; unsigned int ncpus; size_t new_setsize, cur_setsize, cur_nbits, buflen; @@ -120,9 +115,11 @@ int main(int argc, char *argv[]) { NULL, 0, NULL, 0 } }; - while ((opt = getopt_long(argc, argv, "+pchV", longopts, NULL)) != -1) { - int ret = 1; + setlocale(LC_ALL, ""); + bindtextdomain(PACKAGE, LOCALEDIR); + textdomain(PACKAGE); + while ((opt = getopt_long(argc, argv, "+pchV", longopts, NULL)) != -1) { switch (opt) { case 'p': pid = atoi(argv[argc - 1]); @@ -132,98 +129,80 @@ int main(int argc, char *argv[]) break; case 'V': printf("taskset (%s)\n", PACKAGE_STRING); - return 0; + return EXIT_SUCCESS; case 'h': - ret = 0; + usage(stdout); + break; default: - show_usage(argv[0]); - return ret; + usage(stderr); + break; } } if ((!pid && argc - optind < 2) - || (pid && (argc - optind < 1 || argc - optind > 2))) { - show_usage(argv[0]); - return 1; - } + || (pid && (argc - optind < 1 || argc - optind > 2))) + usage(stderr); ncpus = max_number_of_cpus(); /* - * cur_mask is always used for the sched_getaffinity call + * cur_set is always used for the sched_getaffinity call * On the sched_getaffinity the kernel demands a user mask of * at least the size of its own cpumask_t. */ cur_set = cpuset_alloc(ncpus, &cur_setsize, &cur_nbits); - if (!cur_set) { - fprintf (stderr, "cpuset_alloc failed\n"); - exit(1); - } + if (!cur_set) + err(EXIT_FAILURE, _("cpuset_alloc failed")); + buflen = 7 * cur_nbits; buf = malloc(buflen); + if (!buf) + err(EXIT_FAILURE, _("malloc failed")); /* - * new_mask is always used for the sched_setaffinity call + * new_set is always used for the sched_setaffinity call * On the sched_setaffinity the kernel will zero-fill its * cpumask_t if the user's mask is shorter. */ new_set = cpuset_alloc(ncpus, &new_setsize, NULL); - if (!new_set) { - fprintf (stderr, "cpuset_alloc failed\n"); - exit(1); - } + if (!new_set) + err(EXIT_FAILURE, _("cpuset_alloc failed")); if (pid) { - if (sched_getaffinity(pid, cur_setsize, cur_set) < 0) { - perror("sched_getaffinity"); - fprintf(stderr, "failed to get pid %d's affinity\n", - pid); - return 1; - } + if (sched_getaffinity(pid, cur_setsize, cur_set) < 0) + err(EXIT_FAILURE, _("failed to get pid %d's affinity"), pid); + if (c_opt) - printf("pid %d's current affinity list: %s\n", pid, + printf(_("pid %d's current affinity list: %s\n"), pid, cpulist_create(buf, buflen, cur_set, cur_setsize)); else - printf("pid %d's current affinity mask: %s\n", pid, + printf(_("pid %d's current affinity mask: %s\n"), pid, cpumask_create(buf, buflen, cur_set, cur_setsize)); if (argc - optind == 1) - return 0; + return EXIT_SUCCESS; } - if (c_opt) - err = cpulist_parse(argv[optind], new_set, new_setsize); - else - err = cpumask_parse(argv[optind], new_set, new_setsize); + rc = c_opt ? cpulist_parse(argv[optind], new_set, new_setsize) : + cpumask_parse(argv[optind], new_set, new_setsize); - if (err) { - if (c_opt) - fprintf(stderr, "failed to parse CPU list %s\n", + if (rc) + errx(EXIT_FAILURE, _("failed to parse %s %s"), + c_opt ? _("CPU list") : _("CPU mask"), argv[optind]); - else - fprintf(stderr, "failed to parse CPU mask %s\n", - argv[optind]); - return 1; - } - if (sched_setaffinity(pid, new_setsize, new_set) < 0) { - perror("sched_setaffinity"); - fprintf(stderr, "failed to set pid %d's affinity.\n", pid); - return 1; - } + if (sched_setaffinity(pid, new_setsize, new_set) < 0) + err(EXIT_FAILURE, _("failed to set pid %d's affinity"), pid); - if (sched_getaffinity(pid, cur_setsize, cur_set) < 0) { - perror("sched_getaffinity"); - fprintf(stderr, "failed to get pid %d's affinity.\n", pid); - return 1; - } + if (sched_getaffinity(pid, cur_setsize, cur_set) < 0) + err(EXIT_FAILURE, _("failed to get pid %d's affinity"), pid); if (pid) { if (c_opt) - printf("pid %d's new affinity list: %s\n", pid, + printf(_("pid %d's new affinity list: %s\n"), pid, cpulist_create(buf, buflen, cur_set, cur_setsize)); else - printf("pid %d's new affinity mask: %s\n", pid, + printf(_("pid %d's new affinity mask: %s\n"), pid, cpumask_create(buf, buflen, cur_set, cur_setsize)); } @@ -234,10 +213,8 @@ int main(int argc, char *argv[]) if (!pid) { argv += optind + 1; execvp(argv[0], argv); - perror("execvp"); - fprintf(stderr, "failed to execute %s\n", argv[0]); - return 1; + err(EXIT_FAILURE, _("executing %s failed"), argv[0]); } - return 0; + return EXIT_SUCCESS; }