summaryrefslogtreecommitdiff
path: root/libc/stdlib/mkstemp.c
diff options
context:
space:
mode:
Diffstat (limited to 'libc/stdlib/mkstemp.c')
-rw-r--r--libc/stdlib/mkstemp.c43
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;
+}