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-rw-r--r--src/stdio/tempnam.c42
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;
+}