mirror of
https://github.com/sheumann/hush.git
synced 2024-08-16 09:29:16 +00:00
274 lines
5.9 KiB
C
274 lines
5.9 KiB
C
/*
|
|
* 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 Miÿkiewicz <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;
|
|
}
|