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ef467338e4
* libc/sys/linux/Makefile.am: Add support for message queue routines,
ipc routines, and ftok.
* libc/sys/linux/Makefile.in: Regenerated.
* libc/sys/linux/ftok.c: New file.
* libc/sys/linux/ipc.c: Ditto.
* libc/sys/linux/mq_close.c: Ditto.
* libc/sys/linux/mq_getattr.c: Ditto.
* libc/sys/linux/mq_notify.c: Ditto.
* libc/sys/linux/mq_open.c: Ditto.
* libc/sys/linux/mq_receive.c: Ditto.
* libc/sys/linux/mq_send.c: Ditto.
* libc/sys/linux/mq_setattr.c: Ditto.
* libc/sys/linux/mq_unlink.c: Ditto.
* libc/sys/linux/mqlocal.h: Ditto.
* libc/sys/linux/include/mqueue.h: Ditto.
* libc/sys/linux/sys/types.h: Define __gid_t_defined and
__uid_t_defined.
53 lines
808 B
C
53 lines
808 B
C
/* Copyright 2002, Red Hat Inc. */
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#include <mqueue.h>
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#include <errno.h>
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#include <sys/sem.h>
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#include <string.h>
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#define _LIBC
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#include <sys/lock.h>
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#undef _LIBC
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#include "mqlocal.h"
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int
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mq_getattr (mqd_t msgid, struct mq_attr *mqstat)
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{
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struct libc_mq *info;
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struct sembuf sb0 = {0, -1, 0};
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int num_msgs;
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int rc = 0;
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info = __find_mq (msgid);
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if (info == NULL)
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{
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errno = EBADF;
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return -1;
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}
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/* temporarily lock message queue */
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semop (info->semid, &sb0, 1);
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num_msgs = semctl (info->semid, 3, GETVAL);
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if (num_msgs >= 0)
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{
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memcpy (mqstat, info->attr, sizeof(struct mq_attr));
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mqstat->mq_curmsgs = num_msgs;
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}
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else
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rc = -1;
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/* release message queue */
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sb0.sem_op = 1;
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semop (info->semid, &sb0, 1);
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return rc;
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}
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