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-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 @@
+/*
+ * ipcrm.c -- utility to allow removal of IPC objects and data structures.
+ *
+ * 01 Sept 2004 - Rodney Radford <rradford@mindspring.com>
+ * Adapted for busybox from util-linux-2.12a.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * --- Pre-busybox history from util-linux-2.12a ------------------------
+ *
+ * 1999-04-02 frank zago
+ * - can now remove several id's in the same call
+ *
+ * 1999-02-22 Arkadiusz Mi˙kiewicz <misiek@pld.ORG.PL>
+ * - added Native Language Support
+ *
+ * Original author - krishna balasubramanian 1993
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+#include <sys/types.h>
+#include <sys/ipc.h>
+#include <sys/shm.h>
+#include <sys/msg.h>
+#include <sys/sem.h>
+
+/* X/OPEN tells us to use <sys/{types,ipc,sem}.h> for semctl() */
+/* X/OPEN tells us to use <sys/{types,ipc,msg}.h> for msgctl() */
+/* for getopt */
+#include <unistd.h>
+
+/* for tolower and isupper */
+#include <ctype.h>
+
+#include "busybox.h"
+
+#if defined (__GNU_LIBRARY__) && !defined(_SEM_SEMUN_UNDEFINED)
+/* union semun is defined by including <sys/sem.h> */
+#else
+/* according to X/OPEN we have to define it ourselves */
+union semun {
+ int val;
+ struct semid_ds *buf;
+ unsigned short int *array;
+ struct seminfo *__buf;
+};
+#endif
+
+typedef enum type_id {
+ SHM,
+ SEM,
+ MSG
+} type_id;
+
+static int
+remove_ids(type_id type, int argc, char **argv) {
+ int id;
+ int ret = 0; /* for gcc */
+ char *end;
+ int nb_errors = 0;
+ union semun arg;
+
+ arg.val = 0;
+
+ while(argc) {
+
+ id = strtoul(argv[0], &end, 10);
+
+ if (*end != 0) {
+ bb_printf ("invalid id: %s\n", argv[0]);
+ nb_errors ++;
+ } else {
+ switch(type) {
+ case SEM:
+ ret = semctl (id, 0, IPC_RMID, arg);
+ break;
+
+ case MSG:
+ ret = msgctl (id, IPC_RMID, NULL);
+ break;
+
+ case SHM:
+ ret = shmctl (id, IPC_RMID, NULL);
+ break;
+ }
+
+ if (ret) {
+ bb_printf ("cannot remove id %s (%s)\n",
+ argv[0], strerror(errno));
+ nb_errors ++;
+ }
+ }
+ argc--;
+ argv++;
+ }
+
+ return(nb_errors);
+}
+
+static int deprecated_main(int argc, char **argv)
+{
+ if (argc < 3) {
+ bb_show_usage();
+ bb_fflush_stdout_and_exit(1);
+ }
+
+ if (!strcmp(argv[1], "shm")) {
+ if (remove_ids(SHM, argc-2, &argv[2]))
+ bb_fflush_stdout_and_exit(1);
+ }
+ else if (!strcmp(argv[1], "msg")) {
+ if (remove_ids(MSG, argc-2, &argv[2]))
+ bb_fflush_stdout_and_exit(1);
+ }
+ else if (!strcmp(argv[1], "sem")) {
+ if (remove_ids(SEM, argc-2, &argv[2]))
+ bb_fflush_stdout_and_exit(1);
+ }
+ else {
+ bb_printf ("unknown resource type: %s\n", argv[1]);
+ bb_show_usage();
+ bb_fflush_stdout_and_exit(1);
+ }
+
+ bb_printf ("resource(s) deleted\n");
+ return 0;
+}
+
+
+int ipcrm_main(int argc, char **argv)
+{
+ int c;
+ int error = 0;
+ char *prog = argv[0];
+
+ /* if the command is executed without parameters, do nothing */
+ if (argc == 1)
+ return 0;
+
+ /* check to see if the command is being invoked in the old way if so
+ then run the old code */
+ if (strcmp(argv[1], "shm") == 0 ||
+ strcmp(argv[1], "msg") == 0 ||
+ strcmp(argv[1], "sem") == 0)
+ return deprecated_main(argc, argv);
+
+ /* process new syntax to conform with SYSV ipcrm */
+ while ((c = getopt(argc, argv, "q:m:s:Q:M:S:h?")) != -1) {
+ int result;
+ int id = 0;
+ int iskey = isupper(c);
+
+ /* needed to delete semaphores */
+ union semun arg;
+ arg.val = 0;
+
+ if ((c == '?') || (c == 'h'))
+ {
+ bb_show_usage();
+ return 0;
+ }
+
+ /* we don't need case information any more */
+ c = tolower(c);
+
+ /* make sure the option is in range */
+ if (c != 'q' && c != 'm' && c != 's') {
+ bb_show_usage();
+ error++;
+ return error;
+ }
+
+ if (iskey) {
+ /* keys are in hex or decimal */
+ key_t key = strtoul(optarg, NULL, 0);
+ if (key == IPC_PRIVATE) {
+ error++;
+ bb_fprintf(stderr, "%s: illegal key (%s)\n",
+ prog, optarg);
+ continue;
+ }
+
+ /* convert key to id */
+ id = ((c == 'q') ? msgget(key, 0) :
+ (c == 'm') ? shmget(key, 0, 0) :
+ semget(key, 0, 0));
+
+ if (id < 0) {
+ char *errmsg;
+ error++;
+ switch(errno) {
+ case EACCES:
+ errmsg = "permission denied for key";
+ break;
+ case EIDRM:
+ errmsg = "already removed key";
+ break;
+ case ENOENT:
+ errmsg = "invalid key";
+ break;
+ default:
+ errmsg = "unknown error in key";
+ break;
+ }
+ bb_fprintf(stderr, "%s: %s (%s)\n",
+ prog, errmsg, optarg);
+ continue;
+ }
+ } else {
+ /* ids are in decimal */
+ id = strtoul(optarg, NULL, 10);
+ }
+
+ result = ((c == 'q') ? msgctl(id, IPC_RMID, NULL) :
+ (c == 'm') ? shmctl(id, IPC_RMID, NULL) :
+ semctl(id, 0, IPC_RMID, arg));
+
+ if (result < 0) {
+ char *errmsg;
+ error++;
+ switch(errno) {
+ case EACCES:
+ case EPERM:
+ errmsg = iskey
+ ? "permission denied for key"
+ : "permission denied for id";
+ break;
+ case EINVAL:
+ errmsg = iskey
+ ? "invalid key"
+ : "invalid id";
+ break;
+ case EIDRM:
+ errmsg = iskey
+ ? "already removed key"
+ : "already removed id";
+ break;
+ default:
+ errmsg = iskey
+ ? "unknown error in key"
+ : "unknown error in id";
+ break;
+ }
+ bb_fprintf(stderr, "%s: %s (%s)\n",
+ prog, errmsg, optarg);
+ continue;
+ }
+ }
+
+ /* print usage if we still have some arguments left over */
+ if (optind != argc) {
+ bb_show_usage();
+ }
+
+ /* exit value reflects the number of errors encountered */
+ return error;
+}
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