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System V -style IPC removal utility. Implemented by Daniel Boulet

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<danny@BouletFermat.ab.ca>.  Needs a man page and serious cleanup.
also: sysvshm support is #ifdef'd out, because it's not been tested.
This commit is contained in:
cgd 1993-11-14 16:27:58 +00:00
parent 0444b9fbd1
commit 3683d805ff
2 changed files with 220 additions and 0 deletions
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6
usr.bin/ipcrm/Makefile Normal file
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# $Id: Makefile,v 1.1 1993/11/14 16:27:58 cgd Exp $
PROG= ipcrm
NOMAN=
.include <bsd.prog.mk>

214
usr.bin/ipcrm/ipcrm.c Normal file
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/*
* Implement the SYSV ipcrm command.
*
* $Id: ipcrm.c,v 1.1 1993/11/14 16:28:00 cgd Exp $
*/
#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/sem.h>
#include <sys/msg.h>
#include <sys/shm.h>
#include <errno.h>
#define OMIT_SHM /* don't handle shm stuff; untested */
int
getnumber(char *num, long *lptr)
{
char *end;
if (num == NULL) {
fprintf(stderr, "ipcrm: missing numeric parameter\n");
return (0);
}
*lptr = strtol(num, &end, 0);
if (*num == '\0' || *end != '\0') {
fprintf(stderr, "ipcrm: can't convert \"%s\" to an integer\n",
num);
return (0);
}
if (*lptr == LONG_MAX || *lptr == LONG_MIN) {
fprintf(stderr, "ipcrm: absurd numeric parameter \"%s\"\n",
num);
return (0);
}
return (1);
}
main(int argc, char **argv)
{
char *parm;
char tbuf[10000];
int errcnt = 0;
long id;
long key;
while ((parm = *++argv) != NULL) {
if (strcmp(parm, "-q") == 0) {
if (getnumber(*++argv, &id)) {
if (msgctl(id, IPC_RMID, NULL) == 0) {
printf("msqid %s deleted\n", *argv);
} else if (errno == ENOSYS) {
fprintf(stderr, "ipcrm: SYSV message passing not configured in kernel\n");
errcnt += 1;
} else {
strcpy(tbuf, "can't remove msqid ");
strcat(tbuf, *argv);
perror(tbuf);
errcnt += 1;
}
} else {
errcnt += 1;
}
} else if (strcmp(parm, "-m") == 0) {
if (getnumber(*++argv, &id)) {
#ifndef OMIT_SHM
%%%untested %%%
if (shmctl(id, IPC_RMID, NULL) == 0) {
printf("shmid %s deleted\n", *argv);
} else if (errno == ENOSYS) {
fprintf(stderr, "ipcrm: SYSV shared memory not configured in kernel\n");
errcnt += 1;
} else {
strcpy(tbuf, "can't remove shmid ");
strcat(tbuf, *argv);
perror(tbuf);
errcnt += 1;
}
#else
fprintf(stderr, "ipcrm: sorry, this version of ipcrm doesn't support shared memory\n");
errcnt += 1;
#endif
} else {
errcnt += 1;
}
} else if (strcmp(parm, "-s") == 0) {
if (getnumber(*++argv, &id)) {
union semun junk;
if (semctl(id, 0, IPC_RMID, junk) == 0) {
printf("semid %s deleted\n", *argv);
} else if (errno == ENOSYS) {
fprintf(stderr, "ipcrm: SYSV semaphores not configured in kernel\n");
errcnt += 1;
} else {
strcpy(tbuf, "can't remove semid ");
strcat(tbuf, *argv);
perror(tbuf);
errcnt += 1;
}
} else {
errcnt += 1;
}
} else if (strcmp(parm, "-Q") == 0) {
if (getnumber(*++argv, &key)) {
if (key == IPC_PRIVATE) {
fprintf(stderr, "ipcrm: can't remove private message queues\n");
} else {
strcpy(tbuf, "can't access msq key ");
strcat(tbuf, *argv);
if ((id = msgget(key, 0000)) >= 0) {
strcpy(tbuf,
"can't remove msq key ");
strcat(tbuf, *argv);
if (msgctl(id, IPC_RMID, NULL)
== 0) {
printf("msq key %s deleted\n",
*argv);
} else {
perror(tbuf);
errcnt += 1;
}
} else if (errno == ENOSYS) {
fprintf(stderr, "ipcrm: SYSV message passing not configured in kernel\n");
errcnt += 1;
} else {
perror(tbuf);
errcnt += 1;
}
}
} else {
errcnt += 1;
}
} else if (strcmp(parm, "-M") == 0) {
if (getnumber(*++argv, &key)) {
#ifndef OMIT_SHM
%%%untested %%%
if (key == IPC_PRIVATE) {
fprintf(stderr, "ipcrm: can't remove private shared memory segments\n");
} else {
strcpy(tbuf, "can't access shm key ");
strcat(tbuf, *argv);
if ((id = shmget(key, 0, 0000)) >= 0) {
strcpy(tbuf, "can't remove shm key ");
strcat(tbuf, *argv);
if (shmctl(id, IPC_RMID, NULL) == 0) {
printf("shm key %s deleted\n",
*argv);
} else {
perror(tbuf);
errcnt += 1;
}
} else if (errno == ENOSYS) {
fprintf(stderr, "ipcrm: SYSV shared memory not configured in kernel\n");
errcnt += 1;
} else {
perror(tbuf);
errcnt += 1;
}
}
#else
fprintf(stderr, "ipcrm: sorry, this version of ipcrm doesn't support shared memory\n");
errcnt += 1;
#endif
} else {
errcnt += 1;
}
} else if (strcmp(parm, "-S") == 0) {
if (getnumber(*++argv, &key)) {
if (key == IPC_PRIVATE) {
fprintf(stderr, "ipcrm: can't remove private semaphores\n");
} else {
strcpy(tbuf, "can't access sem key ");
strcat(tbuf, *argv);
if ((id = semget(key, 0, 0000)) >= 0) {
union semun junk;
strcpy(tbuf, "can't remove sem key ");
strcat(tbuf, *argv);
if (semctl(id, 0, IPC_RMID, junk) == 0) {
printf("sem key %s deleted\n", *argv);
} else {
perror(tbuf);
errcnt += 1;
}
} else if (errno == ENOSYS) {
fprintf(stderr, "ipcrm: SYSV semaphores not configured in kernel\n");
errcnt += 1;
} else {
perror(tbuf);
errcnt += 1;
}
}
} else {
errcnt += 1;
}
} else {
fprintf(stderr, "ipcrm: illegal parameter \"%s\" - bye!\n", parm);
exit(1);
}
}
if (errcnt == 0) {
exit(0);
} else {
exit(1);
}
}