1 files changed, 28 insertions, 0 deletions
diff --git a/mdk-stage1/dietlibc/libcruft/mkdtemp.c b/mdk-stage1/dietlibc/libcruft/mkdtemp.c
new file mode 100644
index 000000000..1c388938c
--- /dev/null
+++ b/mdk-stage1/dietlibc/libcruft/mkdtemp.c
@@ -0,0 +1,28 @@
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include "dietfeatures.h"
+
+char* mkdtemp(char* template) {
+  char *tmp=template+strlen(template)-6;
+  int randfd,i;
+  unsigned int random;
+  if (tmp<template) goto error;
+  for (i=0; i<6; ++i) if (tmp[i]!='X') { error: errno=EINVAL; return 0; }
+  randfd=open("/dev/urandom",O_RDONLY);
+  for (;;) {
+    read(randfd,&random,sizeof(random));
+    for (i=0; i<6; ++i) {
+      int hexdigit=(random>>(i*5))&0x1f;
+      tmp[i]=hexdigit>9?hexdigit+'a'-10:hexdigit+'0';
+    }
+    if (mkdir(template,0700)==0) break;
+    if (errno==EEXIST) continue;
+    close(randfd);
+    return 0;
+  }
+  close(randfd);
+  return template;
+}