static int
try_create_new(const char *path, const struct file_create_settings *set,
int *fd_r, struct file_lock **lock_r, const char **error_r)
{
string_t *temp_path = t_str_new(128);
int fd, orig_errno, ret = -1;
int mode = set->mode != 0 ? set->mode : 0600;
uid_t uid = set->uid != 0 ? set->uid : (uid_t)-1;
uid_t gid = set->gid != 0 ? set->gid : (gid_t)-1;
str_append(temp_path, path);
if (uid != (uid_t)-1)
fd = safe_mkstemp(temp_path, mode, uid, gid);
else
fd = safe_mkstemp_group(temp_path, mode, gid, set->gid_origin);
if (fd == -1) {
*error_r = t_strdup_printf("safe_mkstemp(%s) failed: %m", path);
return -1;
}
if (file_try_lock_error(fd, str_c(temp_path), F_WRLCK,
set->lock_method, lock_r, error_r) <= 0) {
} else if (link(str_c(temp_path), path) < 0) {
if (errno == EEXIST) {
/* just created by somebody else */
ret = 0;
} else if (errno == ENOENT) {
/* our temp file was just deleted by somebody else,
retry creating it. */
ret = 0;
} else {
*error_r = t_strdup_printf("link(%s, %s) failed: %m",
str_c(temp_path), path);
}
file_lock_free(lock_r);
} else {
i_unlink_if_exists(str_c(temp_path));
*fd_r = fd;
return 1;
}
orig_errno = errno;
i_close_fd(&fd);
i_unlink_if_exists(str_c(temp_path));
errno = orig_errno;
return ret;
}
int safe_mkstemp_hostpid_group(string_t *prefix, mode_t mode,
gid_t gid, const char *gid_origin)
{
str_printfa(prefix, "%s.%s.", my_hostname, my_pid);
return safe_mkstemp_group(prefix, mode, gid, gid_origin);
}
