1 files changed, 42 insertions, 0 deletions
diff --git a/src/stdio/tempnam.c b/src/stdio/tempnam.c
new file mode 100644
index 00000000..2cbcb864
--- /dev/null
+++ b/src/stdio/tempnam.c
@@ -0,0 +1,42 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <limits.h>
+#include <errno.h>
+#include "libc.h"
+
+char *tempnam(const char *dir, const char *pfx)
+{
+	static int lock;
+	static int index;
+	char *s;
+	int pid = getpid();
+	int l;
+
+	if (!dir) dir = P_tmpdir;
+	if (!pfx) pfx = "temp";
+
+	if (access(dir, R_OK|W_OK|X_OK) != 0)
+		return NULL;
+
+	l = strlen(dir) + 1 + strlen(pfx) + 2 + sizeof(int)*3*2 + 1;
+	s = malloc(l);
+	if (!s) {
+		errno = ENOMEM;
+		return NULL;
+	}
+
+	LOCK(&lock);
+	for (; index < TMP_MAX; index++) {
+		snprintf(s, l, "%s/%s-%d-%d", dir, pfx, pid, index);
+		if (access(s, F_OK) != 0) {
+			UNLOCK(&lock);
+			return s;
+		}
+	}
+	UNLOCK(&lock);
+	free(s);
+	return NULL;	
+}