int file_try_lock_error(int fd, const char *path, int lock_type,
enum file_lock_method lock_method,
struct file_lock **lock_r, const char **error_r)
{
return file_wait_lock_error(fd, path, lock_type, lock_method, 0,
lock_r, error_r);
}
static int
try_lock_existing(int fd, const char *path,
const struct file_create_settings *set,
struct file_lock **lock_r, const char **error_r)
{
struct stat st1, st2;
int ret;
if (fstat(fd, &st1) < 0) {
*error_r = t_strdup_printf("fstat(%s) failed: %m", path);
return -1;
}
if (file_wait_lock_error(fd, path, F_WRLCK, set->lock_method,
set->lock_timeout_secs, lock_r, error_r) <= 0)
return -1;
if (stat(path, &st2) == 0) {
ret = st1.st_ino == st2.st_ino &&
CMP_DEV_T(st1.st_dev, st2.st_dev) ? 1 : 0;
} else if (errno == ENOENT) {
ret = 0;
} else {
*error_r = t_strdup_printf("stat(%s) failed: %m", path);
ret = -1;
}
if (ret <= 0) {
/* the fd is closed next - no need to unlock */
file_lock_free(lock_r);
}
return ret;
}
int file_wait_lock(int fd, const char *path, int lock_type,
enum file_lock_method lock_method,
unsigned int timeout_secs,
struct file_lock **lock_r)
{
const char *error;
int ret;
ret = file_wait_lock_error(fd, path, lock_type, lock_method,
timeout_secs, lock_r, &error);
if (ret < 0)
i_error("%s", error);
return ret;
}
