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authorRob Landley <rob@landley.net>2005-06-20 04:30:36 +0000
committerRob Landley <rob@landley.net>2005-06-20 04:30:36 +0000
commit6eb1e416743c597f8ecd3b595ddb00d3aa42c1f4 (patch)
treeb88e5e3d34a2edea9bd2a9c59fd1cf84a62ddf4d /util-linux/ipcrm.c
parentdf1eda82b90d1c179b34d27f2825264efed10045 (diff)
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Rodney Radford submitted ipcs and ipcrm (system V IPC stuff). They could use
some more work to shrink them down.
Diffstat (limited to 'util-linux/ipcrm.c')
-rw-r--r--util-linux/ipcrm.c273
1 files changed, 273 insertions, 0 deletions
diff --git a/util-linux/ipcrm.c b/util-linux/ipcrm.c
new file mode 100644
index 000000000..9e18752a3
--- /dev/null
+++ b/util-linux/ipcrm.c
@@ -0,0 +1,273 @@
1/*
2 * ipcrm.c -- utility to allow removal of IPC objects and data structures.
3 *
4 * 01 Sept 2004 - Rodney Radford <rradford@mindspring.com>
5 * Adapted for busybox from util-linux-2.12a.
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 GNU
15 * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 *
21 * --- Pre-busybox history from util-linux-2.12a ------------------------
22 *
23 * 1999-04-02 frank zago
24 * - can now remove several id's in the same call
25 *
26 * 1999-02-22 Arkadiusz Mi�kiewicz <misiek@pld.ORG.PL>
27 * - added Native Language Support
28 *
29 * Original author - krishna balasubramanian 1993
30 */
31
32#include <stdio.h>
33#include <stdlib.h>
34#include <string.h>
35#include <errno.h>
36
37#include <sys/types.h>
38#include <sys/ipc.h>
39#include <sys/shm.h>
40#include <sys/msg.h>
41#include <sys/sem.h>
42
43/* X/OPEN tells us to use <sys/{types,ipc,sem}.h> for semctl() */
44/* X/OPEN tells us to use <sys/{types,ipc,msg}.h> for msgctl() */
45/* for getopt */
46#include <unistd.h>
47
48/* for tolower and isupper */
49#include <ctype.h>
50
51#include "busybox.h"
52
53#if defined (__GNU_LIBRARY__) && !defined(_SEM_SEMUN_UNDEFINED)
54/* union semun is defined by including <sys/sem.h> */
55#else
56/* according to X/OPEN we have to define it ourselves */
57union semun {
58 int val;
59 struct semid_ds *buf;
60 unsigned short int *array;
61 struct seminfo *__buf;
62};
63#endif
64
65typedef enum type_id {
66 SHM,
67 SEM,
68 MSG
69} type_id;
70
71static int
72remove_ids(type_id type, int argc, char **argv) {
73 int id;
74 int ret = 0; /* for gcc */
75 char *end;
76 int nb_errors = 0;
77 union semun arg;
78
79 arg.val = 0;
80
81 while(argc) {
82
83 id = strtoul(argv[0], &end, 10);
84
85 if (*end != 0) {
86 bb_printf ("invalid id: %s\n", argv[0]);
87 nb_errors ++;
88 } else {
89 switch(type) {
90 case SEM:
91 ret = semctl (id, 0, IPC_RMID, arg);
92 break;
93
94 case MSG:
95 ret = msgctl (id, IPC_RMID, NULL);
96 break;
97
98 case SHM:
99 ret = shmctl (id, IPC_RMID, NULL);
100 break;
101 }
102
103 if (ret) {
104 bb_printf ("cannot remove id %s (%s)\n",
105 argv[0], strerror(errno));
106 nb_errors ++;
107 }
108 }
109 argc--;
110 argv++;
111 }
112
113 return(nb_errors);
114}
115
116static int deprecated_main(int argc, char **argv)
117{
118 if (argc < 3) {
119 bb_show_usage();
120 bb_fflush_stdout_and_exit(1);
121 }
122
123 if (!strcmp(argv[1], "shm")) {
124 if (remove_ids(SHM, argc-2, &argv[2]))
125 bb_fflush_stdout_and_exit(1);
126 }
127 else if (!strcmp(argv[1], "msg")) {
128 if (remove_ids(MSG, argc-2, &argv[2]))
129 bb_fflush_stdout_and_exit(1);
130 }
131 else if (!strcmp(argv[1], "sem")) {
132 if (remove_ids(SEM, argc-2, &argv[2]))
133 bb_fflush_stdout_and_exit(1);
134 }
135 else {
136 bb_printf ("unknown resource type: %s\n", argv[1]);
137 bb_show_usage();
138 bb_fflush_stdout_and_exit(1);
139 }
140
141 bb_printf ("resource(s) deleted\n");
142 return 0;
143}
144
145
146int ipcrm_main(int argc, char **argv)
147{
148 int c;
149 int error = 0;
150 char *prog = argv[0];
151
152 /* if the command is executed without parameters, do nothing */
153 if (argc == 1)
154 return 0;
155
156 /* check to see if the command is being invoked in the old way if so
157 then run the old code */
158 if (strcmp(argv[1], "shm") == 0 ||
159 strcmp(argv[1], "msg") == 0 ||
160 strcmp(argv[1], "sem") == 0)
161 return deprecated_main(argc, argv);
162
163 /* process new syntax to conform with SYSV ipcrm */
164 while ((c = getopt(argc, argv, "q:m:s:Q:M:S:h?")) != -1) {
165 int result;
166 int id = 0;
167 int iskey = isupper(c);
168
169 /* needed to delete semaphores */
170 union semun arg;
171 arg.val = 0;
172
173 if ((c == '?') || (c == 'h'))
174 {
175 bb_show_usage();
176 return 0;
177 }
178
179 /* we don't need case information any more */
180 c = tolower(c);
181
182 /* make sure the option is in range */
183 if (c != 'q' && c != 'm' && c != 's') {
184 bb_show_usage();
185 error++;
186 return error;
187 }
188
189 if (iskey) {
190 /* keys are in hex or decimal */
191 key_t key = strtoul(optarg, NULL, 0);
192 if (key == IPC_PRIVATE) {
193 error++;
194 bb_fprintf(stderr, "%s: illegal key (%s)\n",
195 prog, optarg);
196 continue;
197 }
198
199 /* convert key to id */
200 id = ((c == 'q') ? msgget(key, 0) :
201 (c == 'm') ? shmget(key, 0, 0) :
202 semget(key, 0, 0));
203
204 if (id < 0) {
205 char *errmsg;
206 error++;
207 switch(errno) {
208 case EACCES:
209 errmsg = "permission denied for key";
210 break;
211 case EIDRM:
212 errmsg = "already removed key";
213 break;
214 case ENOENT:
215 errmsg = "invalid key";
216 break;
217 default:
218 errmsg = "unknown error in key";
219 break;
220 }
221 bb_fprintf(stderr, "%s: %s (%s)\n",
222 prog, errmsg, optarg);
223 continue;
224 }
225 } else {
226 /* ids are in decimal */
227 id = strtoul(optarg, NULL, 10);
228 }
229
230 result = ((c == 'q') ? msgctl(id, IPC_RMID, NULL) :
231 (c == 'm') ? shmctl(id, IPC_RMID, NULL) :
232 semctl(id, 0, IPC_RMID, arg));
233
234 if (result < 0) {
235 char *errmsg;
236 error++;
237 switch(errno) {
238 case EACCES:
239 case EPERM:
240 errmsg = iskey
241 ? "permission denied for key"
242 : "permission denied for id";
243 break;
244 case EINVAL:
245 errmsg = iskey
246 ? "invalid key"
247 : "invalid id";
248 break;
249 case EIDRM:
250 errmsg = iskey
251 ? "already removed key"
252 : "already removed id";
253 break;
254 default:
255 errmsg = iskey
256 ? "unknown error in key"
257 : "unknown error in id";
258 break;
259 }
260 bb_fprintf(stderr, "%s: %s (%s)\n",
261 prog, errmsg, optarg);
262 continue;
263 }
264 }
265
266 /* print usage if we still have some arguments left over */
267 if (optind != argc) {
268 bb_show_usage();
269 }
270
271 /* exit value reflects the number of errors encountered */
272 return error;
273}
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