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2ca1376080
No functional code altered. https://dev.haiku-os.org/ticket/17197 Change-Id: I75cc74f6be0ad968fd77c31fbe5b0f650a6fe9e0 Reviewed-on: https://review.haiku-os.org/c/haiku/+/4364 Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org> Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>
77 lines
1.6 KiB
C
77 lines
1.6 KiB
C
// ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
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//
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// Copyright (c) 2004, Haiku
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//
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// This software is part of the Haiku distribution and is covered
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// by the MIT License.
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//
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//
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// File: release.c
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// Author: Jérôme Duval (korli@chez.com)
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// Description: release a semaphore.
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//
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// ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <OS.h>
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static int usage(char *prog)
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{
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printf("usage: release [-f] [-c count] semaphore_number\n");
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printf("warning: this can be hazardous...\n");
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exit(1);
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}
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int main(int argc, char **argv)
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{
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int count = 1;
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bool force = false;
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sem_id semid = -1;
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status_t err;
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team_id teamid = -1;
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int i;
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if (argc < 2 || argc > 5)
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usage("release");
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for (i = 1; i < argc; i++) {
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if (strncmp(argv[i], "-f", 2) == 0) {
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force = true;
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} else if (strncmp(argv[i], "-c", 2) == 0) {
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i++;
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if (i < argc) {
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count = strtol(argv[i], NULL, 10);
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} else
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usage("release");
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} else {
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semid = strtol(argv[i], NULL, 10);
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}
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}
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if (semid <=0)
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usage("release");
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if (force) {
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sem_info sinfo;
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thread_info tinfo;
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get_sem_info(semid, &sinfo);
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teamid = sinfo.team;
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get_thread_info(find_thread(NULL), &tinfo);
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set_sem_owner(semid, tinfo.team);
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}
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printf("releasing semaphore %d\n", (int)semid);
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err = release_sem_etc(semid, count, 0);
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if (err < B_OK) {
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fprintf(stderr, "release_sem failed: %s\n", strerror(err));
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return 1;
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} else if (force) {
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set_sem_owner(semid, teamid);
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}
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return 0;
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}
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