69 lines
2.0 KiB
C
69 lines
2.0 KiB
C
/* Copyright (c) 2016 Phoenix Systems
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All rights reserved.
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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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THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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SUCH DAMAGE.*/
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#include <fcntl.h>
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#include <string.h>
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#include <sys/dirent.h>
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#include <sys/ioctl.h>
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#include <sys/ipc.h>
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#include <unistd.h>
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int shm_open(const char *name, int oflag, mode_t mode)
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{
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char shm_name[PATH_MAX_SIZE + 24] = "/dev/ipc/shm_";
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if (*name == '/')
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++name;
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strncpy(shm_name + 13, name, PATH_MAX_SIZE + 10);
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int fd = open(shm_name, oflag, mode);
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if (fd >= 0) {
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int flags = fcntl(fd, F_GETFD, 0);
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if (flags >= 0) {
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flags |= FD_CLOEXEC;
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flags = fcntl(fd, F_SETFD, flags);
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}
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if (flags == -1) {
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close(fd);
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return -1;
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}
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}
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if (fd != -1 && (oflag | O_CREAT)) {
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if (ioctl(fd, IPC_SHM_INIT, 0) < 0) {
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close(fd);
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return -1;
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}
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}
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return fd;
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}
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int shm_unlink(const char *name)
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{
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return unlink(name);
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}
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