* cygwin.din (fpurge, mkstemps): New exports.

	* include/cygwin/version.h (CYGWIN_VERSION_API_MINOR): Bump.
	* mktemp.cc (_gettemp): Add parameter.
	(mkstemps): New function.
	(mkstemp, mkdtemp, mktemp): Adjust clients.

1 files changed, 23 insertions, 8 deletions

diff --git a/winsup/cygwin/mktemp.cc b/winsup/cygwin/mktemp.cc
index c39fe49be..b8a1381c4 100644
--- a/winsup/cygwin/mktemp.cc
+++ b/winsup/cygwin/mktemp.cc
@@ -1,15 +1,16 @@
 /* mktemp.cc: mktemp functions
 
-This file is adapted for Cygwin from FreeBSD.
+This file is adapted for Cygwin from FreeBSD and newlib.
 
 See the copyright at the bottom of this file. */
 
 #include "winsup.h"
 #include "cygerrno.h"
 #include <fcntl.h>
+#include <sys/stat.h>
 #include <unistd.h>
 
-static int _gettemp(char *, int *, int);
+static int _gettemp(char *, int *, int, size_t);
 static uint32_t arc4random ();
 
 static const char padchar[] =
@@ -19,23 +20,30 @@ extern "C" int
 mkstemp(char *path)
 {
   int fd;
-  return _gettemp(path, &fd, 0) ? fd : -1;
+  return _gettemp(path, &fd, 0, 0) ? fd : -1;
 }
 
 extern "C" char *
 mkdtemp(char *path)
 {
-  return _gettemp(path, NULL, 1) ? path : NULL;
+  return _gettemp(path, NULL, 1, 0) ? path : NULL;
+}
+
+extern "C" int
+mkstemps(char *path, int len)
+{
+  int fd;
+  return _gettemp(path, &fd, 0, len) ? fd : -1;
 }
 
 extern "C" char *
 mktemp(char *path)
 {
-  return _gettemp(path, NULL, 0) ? path : (char *) NULL;
+  return _gettemp(path, NULL, 0, 0) ? path : (char *) NULL;
 }
 
 static int
-_gettemp(char *path, int *doopen, int domkdir)
+_gettemp(char *path, int *doopen, int domkdir, size_t suffixlen)
 {
   char *start, *trv, *suffp;
   char *pad;
@@ -46,12 +54,14 @@ _gettemp(char *path, int *doopen, int domkdir)
       return 0;
     }
 
-  suffp = trv = strchr (path, '\0');
-  if (--trv < path)
+  trv = strchr (path, '\0');
+  if ((size_t) (trv - path) < suffixlen)
     {
       set_errno (EINVAL);
       return 0;
     }
+  trv -= suffixlen;
+  suffp = trv--;
 
   /* Fill space with random characters */
   while (trv >= path && *trv == 'X')
@@ -59,6 +69,11 @@ _gettemp(char *path, int *doopen, int domkdir)
       uint32_t rand = arc4random () % (sizeof (padchar) - 1);
       *trv-- = padchar[rand];
     }
+  if (suffp - trv < 6)
+    {
+      set_errno (EINVAL);
+      return 0;
+    }
   start = trv + 1;
 
   /*