1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
/*
* 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);
atexit(close_stdout);
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();
break;
case 'V':
printf(UTIL_LINUX_VERSION);
return 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;
}
|
