2 * ipcmk.c - used to create ad-hoc IPC segments
4 * Copyright (C) 2008 Hayden A. James (hayden.james@gmail.com)
5 * Copyright (C) 2008 Karel Zak <kzak@redhat.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
30 #include <sys/types.h>
38 static const char *progname;
42 srandom( time( NULL ) );
46 int createShm(size_t size, int permission)
50 key_t key = createKey();
52 if (-1 != (shmid = shmget(key, size, permission | IPC_CREAT)))
58 int createMsg(int permission)
62 key_t key = createKey();
64 if (-1 != (msgid = msgget(key, permission | IPC_CREAT)))
70 int createSem(int nsems, int permission)
74 key_t key = createKey();
76 if (-1 != (semid = semget(key, nsems, permission | IPC_CREAT)))
84 printf(_("\nUsage: %s [options]\n\n"), progname);
86 " -M <size> create shared memory segment of size <size>\n"
87 " -S <nsems> create semaphore array with <nsems> elements\n"
88 " -Q create message queue\n"
89 " -p <mode> permission for the resource (default is 0644)\n"));
90 printf(_("\nFor more information see ipcmk(1).\n\n"));
95 int main(int argc, char **argv)
97 int permission = 0644;
101 int doShm = 0, doMsg = 0, doSem = 0;
103 progname = program_invocation_short_name;
107 setlocale(LC_ALL, "");
108 bindtextdomain(PACKAGE, LOCALEDIR);
111 while((opt = getopt(argc, argv, "hM:QS:p:")) != -1) {
121 nsems = atoi(optarg);
125 permission = strtoul(optarg, NULL, 8);
131 doShm = doMsg = doSem = 0;
136 if(!doShm && !doMsg && !doSem)
141 if (-1 == (shmid = createShm(size, permission)))
142 err(EXIT_FAILURE, _("create share memory failed"));
144 printf(_("Shared memory id: %d\n"), shmid);
149 if (-1 == (msgid = createMsg(permission)))
150 err(EXIT_FAILURE, _("create message queue failed"));
152 printf(_("Message queue id: %d\n"), msgid);
157 if (-1 == (semid = createSem(nsems, permission)))
158 err(EXIT_FAILURE, _("create semaphore failed"));
160 printf(_("Semaphore id: %d\n"), semid);