mirror of https://github.com/mpv-player/mpv
106 lines
2.2 KiB
C
106 lines
2.2 KiB
C
/*
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* This file is part of mpv video player.
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* Copyright © 2014 Alexander Preisinger <alexander.preisinger@gmail.com>
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*
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* mpv is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* mpv is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <string.h>
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#include "video/out/wayland/memfile.h"
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/* copied from weston clients */
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static int set_cloexec_or_close(int fd)
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{
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long flags;
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if (fd == -1)
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return -1;
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if ((flags = fcntl(fd, F_GETFD)) == -1)
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goto err;
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if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) == -1)
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goto err;
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return fd;
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err:
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close(fd);
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return -1;
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}
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static int create_tmpfile_cloexec(char *tmpname)
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{
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int fd;
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#ifdef HAVE_MKOSTEMP
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fd = mkostemp(tmpname, O_CLOEXEC);
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if (fd >= 0)
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unlink(tmpname);
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#else
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fd = mkstemp(tmpname);
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if (fd >= 0) {
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fd = set_cloexec_or_close(fd);
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unlink(tmpname);
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}
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#endif
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return fd;
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}
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static int os_create_anonymous_file(off_t size)
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{
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static const char template[] = "/mpv-temp-XXXXXX";
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const char *path;
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char *name;
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int fd;
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path = getenv("XDG_RUNTIME_DIR");
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if (!path) {
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errno = ENOENT;
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return -1;
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}
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name = malloc(strlen(path) + sizeof(template));
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if (!name)
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return -1;
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strcpy(name, path);
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strcat(name, template);
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fd = create_tmpfile_cloexec(name);
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free(name);
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if (fd < 0)
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return -1;
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if (ftruncate(fd, size) < 0) {
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close(fd);
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return -1;
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}
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return fd;
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}
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int memfile_create(off_t size)
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{
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return os_create_anonymous_file(size);
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}
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