--- /dev/null
+/*
+ * Copyright (c) 1987, 1993
+ * The Regents of the University of California. 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. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)mktemp.c 8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+static int _gettemp(char*,int*);
+
+mkstemp(path)
+ char *path;
+{
+ int fd;
+
+ return (_gettemp(path, &fd) ? fd : -1);
+}
+
+char *
+mktemp(path)
+ char *path;
+{
+ return(_gettemp(path, (int *)NULL) ? path : (char *)NULL);
+}
+
+static
+_gettemp(path, doopen)
+ char *path;
+ register int *doopen;
+{
+ extern int errno;
+ register char *start, *trv;
+ struct stat sbuf;
+ u_int pid;
+
+ pid = getpid();
+ for (trv = path; *trv; ++trv); /* extra X's get set to 0's */
+ while (*--trv == 'X') {
+ *trv = (pid % 10) + '0';
+ pid /= 10;
+ }
+
+ /*
+ * check the target directory; if you have six X's and it
+ * doesn't exist this runs for a *very* long time.
+ */
+ for (start = trv + 1;; --trv) {
+ if (trv <= path)
+ break;
+ if (*trv == '/') {
+ *trv = '\0';
+ if (stat(path, &sbuf))
+ return(0);
+ if (!S_ISDIR(sbuf.st_mode)) {
+ errno = ENOTDIR;
+ return(0);
+ }
+ *trv = '/';
+ break;
+ }
+ }
+
+ for (;;) {
+ if (doopen) {
+ if ((*doopen =
+ open(path, O_CREAT|O_EXCL|O_RDWR, 0600)) >= 0)
+ return(1);
+ if (errno != EEXIST)
+ return(0);
+ }
+ else if (stat(path, &sbuf))
+ return(errno == ENOENT ? 1 : 0);
+
+ /* tricky little algorithm for backward compatibility */
+ for (trv = start;;) {
+ if (!*trv)
+ return(0);
+ if (*trv == 'z')
+ *trv++ = 'a';
+ else {
+ if (isdigit(*trv))
+ *trv = 'a';
+ else
+ ++*trv;
+ break;
+ }
+ }
+ }
+ /*NOTREACHED*/
+}
+
+/*
+ * $PchId: mktemp.c,v 1.3 1995/11/20 19:10:39 philip Exp $
+ */