Import of code from heimdal

This commit updates the code imported from heimdal to
5b91f58f350c92fb9eacd1ebac558381b0b8deac (switch-from-svn-to-git-1705-g5b91f58)

New files are:
	roken/mkstemp.c

Change-Id: I42cf73fd2943e2d5cfa629d3ce05f20a065428a1
Reviewed-on: http://gerrit.openafs.org/3397
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>

diff --git a/src/external/heimdal/roken/mkstemp.c b/src/external/heimdal/roken/mkstemp.c
new file mode 100644 (file)
index 0000000..a3ca6c7
--- /dev/null
+++ b/src/external/heimdal/roken/mkstemp.c
@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <config.h>
+
+#include <string.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#ifdef HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
+#include <errno.h>
+
+#include <roken.h>
+
+#ifndef HAVE_MKSTEMP
+
+ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
+mkstemp(char *template)
+{
+    int start, i;
+    pid_t val;
+    val = getpid();
+    start = strlen(template) - 1;
+    while(template[start] == 'X') {
+       template[start] = '0' + val % 10;
+       val /= 10;
+       start--;
+    }
+
+    do{
+       int fd;
+       fd = open(template, O_RDWR | O_CREAT | O_EXCL, 0600);
+       if(fd >= 0 || errno != EEXIST)
+           return fd;
+       i = start + 1;
+       do{
+           if(template[i] == 0)
+               return -1;
+           template[i]++;
+           if(template[i] == '9' + 1)
+               template[i] = 'a';
+           if(template[i] <= 'z')
+               break;
+           template[i] = 'a';
+           i++;
+       }while(1);
+    }while(1);
+}
+
+#endif