X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fstdio%2Ftmpnam.c;h=6c7c253a6d6ef94bed9e4a10c08ceb7b39b1901c;hb=54316a52b2119edf73e274c8b4f25d7757f7b4d3;hp=6099b74b4c80f261c14201d6c0f62eea010674c3;hpb=507a9fa6ff9948eb7d858467b7be2cb1dcf15d03;p=musl

diff --git a/src/stdio/tmpnam.c b/src/stdio/tmpnam.c
index 6099b74b..6c7c253a 100644
--- a/src/stdio/tmpnam.c
+++ b/src/stdio/tmpnam.c
@@ -1,30 +1,28 @@
 #include <stdio.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <string.h>
 #include <stdlib.h>
-#include <unistd.h>
-#include <time.h>
-#include "libc.h"
 #include "syscall.h"
-#include "atomic.h"
 
 #define MAXTRIES 100
 
-char *tmpnam(char *s)
+char *tmpnam(char *buf)
 {
-	static int index;
-	static char s2[L_tmpnam];
-	struct timespec ts;
-	int try = 0;
-	unsigned n;
-
-	if (!s) s = s2;
-
-	if (__syscall(SYS_access, P_tmpdir, R_OK|W_OK|X_OK) != 0)
-		return NULL;
-
-	do {
-		__syscall(SYS_clock_gettime, CLOCK_REALTIME, &ts, 0);
-		n = ts.tv_nsec ^ (unsigned)&s ^ (unsigned)s;
-		snprintf(s, L_tmpnam, "/tmp/t%x-%x", a_fetch_add(&index, 1), n);
-	} while (!__syscall(SYS_access, s, F_OK) && try++<MAXTRIES);
-	return try==MAXTRIES ? 0 : s;
+	static char internal[L_tmpnam];
+	char s[] = "/tmp/tmpnam_XXXXXX";
+	int try;
+	int r;
+	for (try=0; try<MAXTRIES; try++) {
+		__randname(s+12);
+#ifdef SYS_lstat
+		r = __syscall(SYS_lstat, s, &(struct stat){0});
+#else
+		r = __syscall(SYS_fstatat, AT_FDCWD, s,
+			&(struct stat){0}, AT_SYMLINK_NOFOLLOW);
+#endif
+		if (r == -ENOENT) return strcpy(buf ? buf : internal, s);
+	}
+	return 0;
 }