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/*
* ipcmk.c - used to create ad-hoc IPC segments
*
* Copyright (C) 2008 Hayden A. James (hayden.james@gmail.com)
* Copyright (C) 2008 Karel Zak <kzak@redhat.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <errno.h>
#include <getopt.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#include <sys/sem.h>
#include <sys/shm.h>
#include <sys/time.h>
#include "c.h"
#include "nls.h"
#include "randutils.h"
#include "strutils.h"
#include "closestream.h"
static int create_shm(size_t size, int permission)
{
key_t key;
random_get_bytes(&key, sizeof(key));
return shmget(key, size, permission | IPC_CREAT);
}
static int create_msg(int permission)
{
key_t key;
random_get_bytes(&key, sizeof(key));
return msgget(key, permission | IPC_CREAT);
}
static int create_sem(int nsems, int permission)
{
key_t key;
random_get_bytes(&key, sizeof(key));
return semget(key, nsems, permission | IPC_CREAT);
}
static void __attribute__((__noreturn__)) usage(void)
{
FILE *out = stdout;
fputs(USAGE_HEADER, out);
fprintf(out, _(" %s [options]\n"), program_invocation_short_name);
fputs(USAGE_SEPARATOR, out);
fputs(_("Create various IPC resources.\n"), out);
fputs(USAGE_OPTIONS, out);
fputs(_(" -M, --shmem <size> create shared memory segment of size <size>\n"), out);
fputs(_(" -S, --semaphore <number> create semaphore array with <number> elements\n"), out);
fputs(_(" -Q, --queue create message queue\n"), out);
fputs(_(" -p, --mode <mode> permission for the resource (default is 0644)\n"), out);
fputs(USAGE_SEPARATOR, out);
printf(USAGE_HELP_OPTIONS(26));
printf(USAGE_MAN_TAIL("ipcmk(1)"));
exit(EXIT_SUCCESS);
}
int main(int argc, char **argv)
{
int permission = 0644;
int opt;
size_t size = 0;
int nsems = 0;
int ask_shm = 0, ask_msg = 0, ask_sem = 0;
static const struct option longopts[] = {
{"shmem", required_argument, NULL, 'M'},
{"semaphore", required_argument, NULL, 'S'},
{"queue", no_argument, NULL, 'Q'},
{"mode", required_argument, NULL, 'p'},
{"version", no_argument, NULL, 'V'},
{"help", no_argument, NULL, 'h'},
{NULL, 0, NULL, 0}
};
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
close_stdout_atexit();
while((opt = getopt_long(argc, argv, "hM:QS:p:Vh", longopts, NULL)) != -1) {
switch(opt) {
case 'M':
size = strtosize_or_err(optarg, _("failed to parse size"));
ask_shm = 1;
break;
case 'Q':
ask_msg = 1;
break;
case 'S':
nsems = strtos32_or_err(optarg, _("failed to parse elements"));
ask_sem = 1;
break;
case 'p':
permission = strtoul(optarg, NULL, 8);
break;
case 'h':
usage();
case 'V':
print_version(EXIT_SUCCESS);
default:
errtryhelp(EXIT_FAILURE);
}
}
if(!ask_shm && !ask_msg && !ask_sem) {
warnx(_("bad usage"));
errtryhelp(EXIT_FAILURE);
}
if (ask_shm) {
int shmid;
if (-1 == (shmid = create_shm(size, permission)))
err(EXIT_FAILURE, _("create share memory failed"));
else
printf(_("Shared memory id: %d\n"), shmid);
}
if (ask_msg) {
int msgid;
if (-1 == (msgid = create_msg(permission)))
err(EXIT_FAILURE, _("create message queue failed"));
else
printf(_("Message queue id: %d\n"), msgid);
}
if (ask_sem) {
int semid;
if (-1 == (semid = create_sem(nsems, permission)))
err(EXIT_FAILURE, _("create semaphore failed"));
else
printf(_("Semaphore id: %d\n"), semid);
}
return EXIT_SUCCESS;
}
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