Initial revision

1 files changed, 23 insertions, 0 deletions

diff --git a/mdk-stage1/dietlibc/libcruft/mkstemp.c b/mdk-stage1/dietlibc/libcruft/mkstemp.c
new file mode 100644
index 000000000..3b24ecb54
--- /dev/null
+++ b/mdk-stage1/dietlibc/libcruft/mkstemp.c
@@ -0,0 +1,23 @@
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include <errno.h>
+
+int mkstemp(char* template) {
+  char *tmp=template+strlen(template)-6;
+  int randfd;
+  int i,res;
+  unsigned int random;
+  for (i=0; i<6; ++i) if (tmp[i]!='X') { __set_errno(EINVAL); return -1; }
+  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';
+    }
+    res=open(template,O_CREAT|O_RDWR|O_EXCL,0600);
+    if (res>=0) return res;
+  }
+  close(randfd);
+}