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Use O_TMPFILE when available

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This commit is contained in:
Kovid Goyal 2021-01-03 07:07:50 +05:30
parent 14d9bcb08a
commit d1496f1eb5
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GPG Key ID: 06BC317B515ACE7C
1 changed files with 8 additions and 1 deletions
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9
kitty/disk-cache.c
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@ -82,17 +82,24 @@ new(PyTypeObject *type, PyObject UNUSED *args, PyObject UNUSED *kwds) {
static int
open_cache_file(const char *cache_path) {
int fd = -1;
#ifdef O_TMPFILE
while (fd < 0) {
fd = open(cache_path, O_TMPFILE | O_CLOEXEC | O_EXCL | O_RDWR, S_IRUSR | S_IWUSR);
if (fd > -1 || errno != EINTR) break;
}
#else
size_t sz = strlen(cache_path) + 16;
char *buf = calloc(1, sz);
if (!buf) { errno = ENOMEM; return -1; }
snprintf(buf, sz - 1, "%s/XXXXXXXXXXXX", cache_path);
int fd = -1;
while (fd < 0) {
fd = mkostemp(buf, O_CLOEXEC);
if (fd > -1 || errno != EINTR) break;
}
if (fd > -1) unlink(buf);
free(buf);
#endif
return fd;
}