static int __init make_tempfile()

in os-Linux/mem.c [95:143]

• 41 lines of code
• 10 McCabe index (conditional complexity)

static int __init make_tempfile(const char *template)
{
	char *tempname;
	int fd;

	if (tempdir == NULL) {
		tempdir = choose_tempdir();
		if (tempdir == NULL) {
			os_warn("Failed to choose tempdir: %s\n",
				strerror(errno));
			return -1;
		}
	}

#ifdef O_TMPFILE
	fd = open(tempdir, O_CLOEXEC | O_RDWR | O_EXCL | O_TMPFILE, 0700);
	/*
	 * If the running system does not support O_TMPFILE flag then retry
	 * without it.
	 */
	if (fd != -1 || (errno != EINVAL && errno != EISDIR &&
			errno != EOPNOTSUPP))
		return fd;
#endif

	tempname = malloc(strlen(tempdir) + strlen(template) + 1);
	if (tempname == NULL)
		return -1;

	strcpy(tempname, tempdir);
	strcat(tempname, template);
	fd = mkstemp(tempname);
	if (fd < 0) {
		os_warn("open - cannot create %s: %s\n", tempname,
			strerror(errno));
		goto out;
	}
	if (unlink(tempname) < 0) {
		perror("unlink");
		goto close;
	}
	free(tempname);
	return fd;
close:
	close(fd);
out:
	free(tempname);
	return -1;
}