#include <stdio.h>
#include <fcntl.h>
#include "stdio_impl.h"
#include "pthread_impl.h"

#define MAXTRIES 100

char *__randname(char *);

FILE *tmpfile(void)
{
#ifdef O_TMPFILE
	int fd;
	FILE *f = 0;
	fd = sys_open("/tmp", O_RDWR|O_TMPFILE);
	if (fd >= 0) {
		f = __fdopen(fd, "w+");
		if (!f) __syscall(SYS_close, fd);
	}
	return f;
#else
	char s[] = "/tmp/tmpfile_XXXXXX";
	FILE *f = 0;
	int fd;
	int try;
	sigset_t saved_mask;

	pthread_sigmask(SIG_SETMASK, SIGALL_SET, &saved_mask);
	for (try=0; try<MAXTRIES; try++) {
		__randname(s+13);
		fd = sys_open(s, O_RDWR|O_CREAT|O_EXCL, 0600);
		if (fd >= 0) {
#ifdef SYS_unlink
			__syscall(SYS_unlink, s);
#else
			__syscall(SYS_unlinkat, AT_FDCWD, s, 0);
#endif
			pthread_sigmask(SIG_SETMASK, &saved_mask, 0);
			f = __fdopen(fd, "w+");
			if (!f) __syscall(SYS_close, fd);
			return f;
		}
	}
	pthread_sigmask(SIG_SETMASK, &saved_mask, 0);
	return 0;
#endif /*O_TMPFILE*/
}

LFS64(tmpfile);