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/* Copyright 2002, Red Hat Inc. */
#include <mqueue.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <sys/ipc.h>
#include <sys/sem.h>
#include <string.h>
#include <stdlib.h>
#include <machine/weakalias.h>
#define _LIBC 1
#include <sys/lock.h>
#undef _LIBC
#include "mqlocal.h"
int
mq_unlink (const char *name)
{
int size;
int saved_errno;
char *real_name;
char *ptr;
int i, rc;
int semid, msgqid;
key_t key;
/* ignore opening slash if present */
if (*name == '/')
++name;
size = strlen(name);
if ((real_name = (char *)malloc (size + sizeof(MSGQ_PREFIX))) == NULL)
{
errno = ENOSPC;
return -1;
}
/* use given name to create shared memory file name - we convert any
slashes to underscores so we don't have to create directories */
memcpy (real_name, MSGQ_PREFIX, sizeof(MSGQ_PREFIX) - 1);
memcpy (real_name + sizeof(MSGQ_PREFIX) - 1, name, size + 1);
ptr = real_name + sizeof(MSGQ_PREFIX) - 1;
for (i = 0; i < size; ++i)
{
if (*ptr == '/')
*ptr = '_';
++ptr;
}
/* get key and then unlink shared memory file */
if ((key = ftok(real_name, 255)) == (key_t)-1)
return -1;
rc = unlink (real_name);
if (rc == 0)
{
/* try to remove semaphore and msg queues associated with shared memory file */
saved_errno = errno;
semid = semget (key, 6, 0);
if (semid != -1)
semctl (semid, 0, IPC_RMID);
msgqid = msgget (key, 0);
if (msgqid != -1)
msgctl (msgqid, IPC_RMID, NULL);
errno = saved_errno;
}
return rc;
}
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