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1b3f1330 HJ |
1 | /* |
2 | * ipcmk.c - used to create ad-hoc IPC segments | |
3 | * | |
4 | * Copyright (C) 2008 Hayden A. James (hayden.james@gmail.com) | |
cc41c0a3 | 5 | * Copyright (C) 2008 Karel Zak <kzak@redhat.com> |
1b3f1330 HJ |
6 | * |
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. | |
11 | * | |
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. | |
16 | * | |
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. | |
20 | */ | |
21 | ||
22 | #include <stdlib.h> | |
23 | #include <stdio.h> | |
24 | #include <string.h> | |
25 | #include <errno.h> | |
26 | #include <time.h> | |
003f4976 | 27 | #include <getopt.h> |
1b3f1330 HJ |
28 | |
29 | #include <unistd.h> | |
30 | #include <sys/types.h> | |
31 | #include <sys/ipc.h> | |
32 | #include <sys/shm.h> | |
33 | #include <sys/sem.h> | |
34 | #include <sys/msg.h> | |
35 | ||
f635c336 | 36 | #include "nls.h" |
eb76ca98 | 37 | #include "c.h" |
c821a125 | 38 | #include "strutils.h" |
f635c336 | 39 | |
0eeec415 | 40 | key_t create_key(void) |
1b3f1330 | 41 | { |
0eeec415 | 42 | srandom(time(NULL)); |
1b3f1330 HJ |
43 | return random(); |
44 | } | |
45 | ||
0eeec415 | 46 | int create_shm(size_t size, int permission) |
1b3f1330 | 47 | { |
0eeec415 | 48 | key_t key = create_key(); |
f5b0684e | 49 | return shmget(key, size, permission | IPC_CREAT); |
1b3f1330 HJ |
50 | } |
51 | ||
0eeec415 | 52 | int create_msg(int permission) |
1b3f1330 | 53 | { |
0eeec415 | 54 | key_t key = create_key(); |
f5b0684e | 55 | return msgget(key, permission | IPC_CREAT); |
1b3f1330 HJ |
56 | } |
57 | ||
0eeec415 | 58 | int create_sem(int nsems, int permission) |
1b3f1330 | 59 | { |
0eeec415 | 60 | key_t key = create_key(); |
f5b0684e | 61 | return semget(key, nsems, permission | IPC_CREAT); |
1b3f1330 HJ |
62 | } |
63 | ||
003f4976 | 64 | static void __attribute__ ((__noreturn__)) usage(FILE * out) |
1b3f1330 | 65 | { |
003f4976 | 66 | fprintf(out, USAGE_HEADER); |
f5b0684e | 67 | fprintf(out, _(" %s [options]\n"), program_invocation_short_name); |
003f4976 SK |
68 | fprintf(out, USAGE_OPTIONS); |
69 | ||
70 | fputs(_(" -M, --shmem <size> create shared memory segment of size <size>\n"), out); | |
71 | fputs(_(" -S, --semaphore <nsems> create semaphore array with <nsems> elements\n"), out); | |
72 | fputs(_(" -Q, --queue create message queue\n"), out); | |
73 | fputs(_(" -p, --mode <mode> permission for the resource (default is 0644)\n"), out); | |
74 | ||
75 | fprintf(out, USAGE_HELP); | |
76 | fprintf(out, USAGE_VERSION); | |
77 | fprintf(out, USAGE_BEGIN_TAIL); | |
78 | fprintf(out, USAGE_MAN_TAIL, "ipcmk(1)"); | |
79 | exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS); | |
1b3f1330 HJ |
80 | } |
81 | ||
82 | int main(int argc, char **argv) | |
83 | { | |
84 | int permission = 0644; | |
85 | int opt; | |
86 | size_t size = 0; | |
87 | int nsems = 0; | |
0eeec415 | 88 | int ask_shm = 0, ask_msg = 0, ask_sem = 0; |
003f4976 SK |
89 | static const struct option longopts[] = { |
90 | {"shmem", required_argument, NULL, 'M'}, | |
91 | {"semaphore", required_argument, NULL, 'S'}, | |
92 | {"queue", no_argument, NULL, 'Q'}, | |
93 | {"mode", required_argument, NULL, 'p'}, | |
94 | {"version", no_argument, NULL, 'V'}, | |
95 | {"help", no_argument, NULL, 'h'}, | |
96 | {NULL, 0, NULL, 0} | |
97 | }; | |
1b3f1330 | 98 | |
f635c336 KZ |
99 | setlocale(LC_ALL, ""); |
100 | bindtextdomain(PACKAGE, LOCALEDIR); | |
101 | textdomain(PACKAGE); | |
102 | ||
003f4976 | 103 | while((opt = getopt_long(argc, argv, "hM:QS:p:Vh", longopts, NULL)) != -1) { |
1b3f1330 HJ |
104 | switch(opt) { |
105 | case 'M': | |
c821a125 | 106 | size = strtol_or_err(optarg, _("failed to parse size")); |
0eeec415 | 107 | ask_shm = 1; |
1b3f1330 HJ |
108 | break; |
109 | case 'Q': | |
0eeec415 | 110 | ask_msg = 1; |
1b3f1330 HJ |
111 | break; |
112 | case 'S': | |
c821a125 | 113 | nsems = strtol_or_err(optarg, _("failed to parse elements")); |
0eeec415 | 114 | ask_sem = 1; |
1b3f1330 HJ |
115 | break; |
116 | case 'p': | |
117 | permission = strtoul(optarg, NULL, 8); | |
118 | break; | |
cc41c0a3 | 119 | case 'h': |
003f4976 | 120 | usage(stdout); |
cc41c0a3 | 121 | break; |
003f4976 SK |
122 | case 'V': |
123 | printf(UTIL_LINUX_VERSION); | |
124 | return EXIT_SUCCESS; | |
1b3f1330 | 125 | default: |
0eeec415 | 126 | ask_shm = ask_msg = ask_sem = 0; |
1b3f1330 HJ |
127 | break; |
128 | } | |
129 | } | |
130 | ||
0eeec415 | 131 | if(!ask_shm && !ask_msg && !ask_sem) |
003f4976 | 132 | usage(stderr); |
cc41c0a3 | 133 | |
0eeec415 | 134 | if (ask_shm) { |
1b3f1330 | 135 | int shmid; |
0eeec415 | 136 | if (-1 == (shmid = create_shm(size, permission))) |
f635c336 | 137 | err(EXIT_FAILURE, _("create share memory failed")); |
1b3f1330 | 138 | else |
f635c336 | 139 | printf(_("Shared memory id: %d\n"), shmid); |
1b3f1330 HJ |
140 | } |
141 | ||
0eeec415 | 142 | if (ask_msg) { |
1b3f1330 | 143 | int msgid; |
0eeec415 | 144 | if (-1 == (msgid = create_msg(permission))) |
f635c336 | 145 | err(EXIT_FAILURE, _("create message queue failed")); |
1b3f1330 | 146 | else |
f635c336 | 147 | printf(_("Message queue id: %d\n"), msgid); |
1b3f1330 HJ |
148 | } |
149 | ||
0eeec415 | 150 | if (ask_sem) { |
1b3f1330 | 151 | int semid; |
0eeec415 | 152 | if (-1 == (semid = create_sem(nsems, permission))) |
f635c336 | 153 | err(EXIT_FAILURE, _("create semaphore failed")); |
1b3f1330 | 154 | else |
f635c336 | 155 | printf(_("Semaphore id: %d\n"), semid); |
1b3f1330 HJ |
156 | } |
157 | ||
cc41c0a3 | 158 | return EXIT_SUCCESS; |
1b3f1330 | 159 | } |