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 *array;
28 struct seminfo *__buf;
32 #define IPCRM_LEGACY 1
37 typedef enum type_id {
43 static int remove_ids(type_id type, int argc, char **argv)
46 int ret = 0; /* silence gcc */
53 id = bb_strtoul(argv[0], NULL, 10);
54 if (errno || id > INT_MAX) {
55 bb_error_msg("invalid id: %s", argv[0]);
59 ret = semctl(id, 0, IPC_RMID, arg);
61 ret = msgctl(id, IPC_RMID, NULL);
63 ret = shmctl(id, IPC_RMID, NULL);
66 bb_perror_msg("cannot remove id %s", argv[0]);
76 #endif /* IPCRM_LEGACY */
79 int ipcrm_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
80 int ipcrm_main(int argc, char **argv)
85 /* if the command is executed without parameters, do nothing */
89 /* check to see if the command is being invoked in the old way if so
90 then run the old code. Valid commands are msg, shm, sem. */
92 type_id what = 0; /* silence gcc */
96 if ( ((w == 'm' && argv[1][1] == 's' && argv[1][2] == 'g')
98 && ((w=argv[1][1]) == 'h' || w == 'e')
100 ) && argv[1][3] == '\0'
113 if (remove_ids(what, argc-2, &argv[2]))
114 fflush_stdout_and_exit(EXIT_FAILURE);
115 printf("resource(s) deleted\n");
119 #endif /* IPCRM_LEGACY */
121 /* process new syntax to conform with SYSV ipcrm */
122 while ((c = getopt(argc, argv, "q:m:s:Q:M:S:h?")) != -1) {
125 int iskey = (isupper)(c);
127 /* needed to delete semaphores */
132 if ((c == '?') || (c == 'h')) {
136 /* we don't need case information any more */
139 /* make sure the option is in range: allowed are q, m, s */
140 if (c != 'q' && c != 'm' && c != 's') {
145 /* keys are in hex or decimal */
146 key_t key = xstrtoul(optarg, 0);
148 if (key == IPC_PRIVATE) {
150 bb_error_msg("illegal key (%s)", optarg);
154 /* convert key to id */
155 id = ((c == 'q') ? msgget(key, 0) :
156 (c == 'm') ? shmget(key, 0, 0) : semget(key, 0, 0));
164 errmsg = "permission denied for";
167 errmsg = "already removed";
173 errmsg = "unknown error in";
176 bb_error_msg("%s %s (%s)", errmsg, "key", optarg);
180 /* ids are in decimal */
184 result = ((c == 'q') ? msgctl(id, IPC_RMID, NULL) :
185 (c == 'm') ? shmctl(id, IPC_RMID, NULL) :
186 semctl(id, 0, IPC_RMID, arg));
190 const char *const what = iskey ? "key" : "id";
196 errmsg = "permission denied for";
202 errmsg = "already removed";
205 errmsg = "unknown error in";
208 bb_error_msg("%s %s (%s)", errmsg, what, optarg);
213 /* print usage if we still have some arguments left over */
214 if (optind != argc) {
218 /* exit value reflects the number of errors encountered */