306fe4968e
Due to the file permission bits (umask(3)) the semaphore wasn't created with correct permissions.
80 lines
2.4 KiB
C
80 lines
2.4 KiB
C
/*-
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* Copyright (c) 2014 Juan Romero Pardines.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include "defs.h"
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struct idxlock *
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index_lock(struct xbps_handle *xhp)
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{
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struct idxlock *il;
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mode_t myumask;
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if ((il = malloc(sizeof(struct idxlock))) == NULL)
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return NULL;
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/*
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* Generate semaphore name for target architecture.
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*/
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il->semname = xbps_xasprintf("/xbps-rindex-%s",
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xhp->target_arch ? xhp->target_arch : xhp->native_arch);
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/*
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* Create/open the POSIX named semaphore.
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*/
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myumask = umask(0);
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il->sem = sem_open(il->semname, O_CREAT, 0660, 1);
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umask(myumask);
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if (il->sem == SEM_FAILED) {
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fprintf(stderr, "%s: failed to create/open named "
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"semaphore: %s\n", _XBPS_RINDEX, strerror(errno));
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return NULL;
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}
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if (sem_wait(il->sem) == -1) {
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fprintf(stderr, "%s: failed to lock named semaphore: %s\n",
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_XBPS_RINDEX, strerror(errno));
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return NULL;
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}
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return il;
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}
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void
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index_unlock(struct idxlock *il)
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{
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/* Unlock semaphore, close and destroy it (if possible) */
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sem_post(il->sem);
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sem_close(il->sem);
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sem_unlink(il->semname);
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free(il->semname);
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free(il);
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}
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