1 /* vi: set sw=4 ts=4: */
3 * ipcrm.c - utility to allow removal of IPC objects and data structures.
5 * 01 Sept 2004 - Rodney Radford <rradford@mindspring.com>
6 * Adapted for busybox from util-linux-2.12a.
8 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
13 /* X/OPEN tells us to use <sys/{types,ipc,sem}.h> for semctl() */
14 /* X/OPEN tells us to use <sys/{types,ipc,msg}.h> for msgctl() */
20 #if defined (__GNU_LIBRARY__) && !defined(_SEM_SEMUN_UNDEFINED)
21 /* union semun is defined by including <sys/sem.h> */
23 /* according to X/OPEN we have to define it ourselves */
27 unsigned short int *array;
28 struct seminfo *__buf;
32 #ifndef CONFIG_IPCRM_DROP_LEGACY
34 typedef enum type_id {
40 static int remove_ids(type_id type, int argc, char **argv)
43 int ret = 0; /* silence gcc */
50 id = bb_strtoul(argv[0], NULL, 10);
51 if (errno || id > INT_MAX) {
52 bb_error_msg("invalid id: %s", argv[0]);
56 ret = semctl(id, 0, IPC_RMID, arg);
58 ret = msgctl(id, IPC_RMID, NULL);
60 ret = shmctl(id, IPC_RMID, NULL);
63 bb_perror_msg("cannot remove id %s", argv[0]);
73 #endif /* #ifndef CONFIG_IPCRM_DROP_LEGACY */
76 int ipcrm_main(int argc, char **argv)
81 /* if the command is executed without parameters, do nothing */
84 #ifndef CONFIG_IPCRM_DROP_LEGACY
85 /* check to see if the command is being invoked in the old way if so
86 then run the old code. Valid commands are msg, shm, sem. */
88 type_id what = 0; /* silence gcc */
92 if ( ((w == 'm' && argv[1][1] == 's' && argv[1][2] == 'g')
94 && ((w=argv[1][1]) == 'h' || w == 'e')
96 ) && argv[1][3] == '\0'
109 if (remove_ids(what, argc-2, &argv[2]))
110 fflush_stdout_and_exit(1);
111 printf("resource(s) deleted\n");
115 #endif /* #ifndef CONFIG_IPCRM_DROP_LEGACY */
117 /* process new syntax to conform with SYSV ipcrm */
118 while ((c = getopt(argc, argv, "q:m:s:Q:M:S:h?")) != -1) {
121 int iskey = (isupper)(c);
123 /* needed to delete semaphores */
128 if ((c == '?') || (c == 'h')) {
132 /* we don't need case information any more */
135 /* make sure the option is in range: allowed are q, m, s */
136 if (c != 'q' && c != 'm' && c != 's') {
141 /* keys are in hex or decimal */
142 key_t key = xstrtoul(optarg, 0);
144 if (key == IPC_PRIVATE) {
146 bb_error_msg("illegal key (%s)", optarg);
150 /* convert key to id */
151 id = ((c == 'q') ? msgget(key, 0) :
152 (c == 'm') ? shmget(key, 0, 0) : semget(key, 0, 0));
156 const char * const what = "key";
161 errmsg = "permission denied for";
164 errmsg = "already removed";
170 errmsg = "unknown error in";
173 bb_error_msg("%s %s (%s)", errmsg, what, optarg);
177 /* ids are in decimal */
181 result = ((c == 'q') ? msgctl(id, IPC_RMID, NULL) :
182 (c == 'm') ? shmctl(id, IPC_RMID, NULL) :
183 semctl(id, 0, IPC_RMID, arg));
187 const char * const what = iskey ? "key" : "id";
193 errmsg = "permission denied for";
199 errmsg = "already removed";
202 errmsg = "unknown error in";
205 bb_error_msg("%s %s (%s)", errmsg, what, optarg);
210 /* print usage if we still have some arguments left over */
211 if (optind != argc) {
215 /* exit value reflects the number of errors encountered */