Added the bin command "release"

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@7028 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/apps/bin/Jamfile

@@ -61,6 +61,7 @@ StdBinCommands
 	mount.c
 	prio.c
 	ps.c
+	release.c
 	renice.c
 	rescan.c
 	rmattr.cpp

src/apps/bin/release.c

@@ -0,0 +1,76 @@
+// ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
+//
+//  Copyright (c) 2004, OpenBeOS
+//
+//  This software is part of the OpenBeOS distribution and is covered
+//  by the OpenBeOS license.
+//
+//
+//  File:        release.c
+//  Author:      Jérôme Duval ([email protected])
+//  Description: release a semaphore.
+//
+// ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <OS.h>
+
+static int usage(char *prog)
+{
+	printf("usage: release [-f] [-c count] semaphore_number\n");
+	printf("warning: this can be hazardous...\n");
+	exit(1);
+}
+
+
+int main(int argc, char **argv)
+{
+	int count = 1;
+	bool force = false;
+	sem_id semid = -1;
+	status_t err;
+	team_id teamid = -1;
+	
+	int i;
+	if (argc < 2 || argc > 5)
+		usage("release");
+	for (i = 1; i < argc; i++) {
+		if (strncmp(argv[i], "-f", 2) == 0) {
+			force = true;
+		} else if (strncmp(argv[i], "-c", 2) == 0) {
+			i++;
+			if (i < argc) {
+				count = strtol(argv[i], NULL, 10);
+			} else
+				usage("release");
+		} else {
+			semid = strtol(argv[i], NULL, 10);
+		}
+	}
+	
+	if (semid <=0)
+		usage("release");
+	
+	if (force) {
+		sem_info sinfo;
+		thread_info tinfo;
+		get_sem_info(semid, &sinfo);
+		teamid = sinfo.team;
+		get_thread_info(find_thread(NULL), &tinfo);
+		set_sem_owner(semid, tinfo.team);
+	}
+	
+	printf("releasing semaphore %d\n", (int)semid);
+	err = release_sem_etc(semid, count, 0);
+		
+	if (err < B_OK) {
+		fprintf(stderr, "release_sem failed: %s\n", strerror(err));
+		return 1;
+	} else if (force) {
+		set_sem_owner(semid, teamid);
+	}
+
+	return 0;	
+}