mirror of
https://github.com/mpv-player/mpv
synced 2024-12-27 01:22:30 +00:00
5fed98e0ee
Look it up if you really care but basically z as a format specifier often doesn't work in mingw because reasons. Our CI was working by accident because of meson previously ignoring the CFLAGS variable. Use our wrapper instead for these places.
88 lines
2.4 KiB
C
88 lines
2.4 KiB
C
/*
|
|
* I/O utility functions
|
|
*
|
|
* This file is part of mpv.
|
|
*
|
|
* mpv is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* mpv is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <assert.h>
|
|
#include <errno.h>
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
#include <sys/types.h>
|
|
#include <limits.h>
|
|
|
|
#include "mpv_talloc.h"
|
|
#include "config.h"
|
|
#include "common/common.h"
|
|
#include "misc/random.h"
|
|
#include "misc/io_utils.h"
|
|
#include "osdep/io.h"
|
|
|
|
int mp_mkostemps(char *template, int suffixlen, int flags)
|
|
{
|
|
size_t len = strlen(template);
|
|
char *t = len >= 6 + suffixlen ? &template[len - (6 + suffixlen)] : NULL;
|
|
if (!t || strncmp(t, "XXXXXX", 6) != 0) {
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
|
|
for (size_t fuckshit = 0; fuckshit < UINT32_MAX; fuckshit++) {
|
|
// Using a random value may make it require fewer iterations (even if
|
|
// not truly random; just a counter would be sufficient).
|
|
size_t fuckmess = mp_rand_next();
|
|
char crap[7] = "";
|
|
mp_tprintf_buf(crap, sizeof(crap), "%06zx", fuckmess);
|
|
memcpy(t, crap, 6);
|
|
|
|
int res = open(template, O_RDWR | O_CREAT | O_EXCL | flags, 0600);
|
|
if (res >= 0 || errno != EEXIST)
|
|
return res;
|
|
}
|
|
|
|
errno = EEXIST;
|
|
return -1;
|
|
}
|
|
|
|
bool mp_save_to_file(const char *filepath, const void *data, size_t size)
|
|
{
|
|
assert(filepath && data && size);
|
|
|
|
bool result = false;
|
|
char *tmp = talloc_asprintf(NULL, "%sXXXXXX", filepath);
|
|
int fd = mp_mkostemps(tmp, 0, O_CLOEXEC);
|
|
if (fd < 0)
|
|
goto done;
|
|
FILE *cache = fdopen(fd, "wb");
|
|
if (!cache) {
|
|
close(fd);
|
|
unlink(tmp);
|
|
goto done;
|
|
}
|
|
size_t written = fwrite(data, size, 1, cache);
|
|
int ret = fclose(cache);
|
|
if (written > 0 && !ret) {
|
|
ret = rename(tmp, filepath);
|
|
result = !ret;
|
|
} else {
|
|
unlink(tmp);
|
|
}
|
|
|
|
done:
|
|
talloc_free(tmp);
|
|
return result;
|
|
}
|