1 files changed, 43 insertions, 0 deletions
diff --git a/libc/stdlib/mkstemp.c b/libc/stdlib/mkstemp.c
new file mode 100644
index 000000000..d65ada4f7
--- /dev/null
+++ b/libc/stdlib/mkstemp.c
@@ -0,0 +1,43 @@
+
+#include <features.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+int mkstemp(template)
+char * template;
+{
+	int i;
+	int num; /* UNINITIALIZED */
+	int n2;
+	int l = strlen(template);
+	
+	if (l<6) {
+		errno = EINVAL;
+		return -1;
+	}
+	
+	for(i=l-6;i<l;i++)
+		if (template[i] != 'X') {
+			errno = EINVAL;
+			return -1;
+		}
+	
+again:	
+	n2 = num;
+	for(i=l-1;i>=l-6;i--) {
+		template[i] = '0' + n2 % 10;
+		n2 /= 10;
+	}
+	
+	i = open(template, O_RDWR|O_EXCL|O_CREAT, 0666);
+	
+	if (i==-1) {
+		if (errno == EEXIST) {
+			num++;
+			goto again;
+		} else
+			return -1;
+	}
+	
+	return i;
+}