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-rw-r--r--openbsd-compat/mktemp.c141
1 files changed, 141 insertions, 0 deletions
diff --git a/openbsd-compat/mktemp.c b/openbsd-compat/mktemp.c
new file mode 100644
index 0000000..4eb52f4
--- /dev/null
+++ b/openbsd-compat/mktemp.c
@@ -0,0 +1,141 @@
+/* THIS FILE HAS BEEN MODIFIED FROM THE ORIGINAL OPENBSD SOURCE */
+/* Changes: Removed mktemp */
+
+/* $OpenBSD: mktemp.c,v 1.30 2010/03/21 23:09:30 schwarze Exp $ */
+/*
+ * Copyright (c) 1996-1998, 2008 Theo de Raadt
+ * Copyright (c) 1997, 2008-2009 Todd C. Miller
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/* OPENBSD ORIGINAL: lib/libc/stdio/mktemp.c */
+
+#include "includes.h"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <unistd.h>
+
+#if !defined(HAVE_MKDTEMP) || defined(HAVE_STRICT_MKSTEMP)
+
+#define MKTEMP_NAME 0
+#define MKTEMP_FILE 1
+#define MKTEMP_DIR 2
+
+#define TEMPCHARS "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
+#define NUM_CHARS (sizeof(TEMPCHARS) - 1)
+
+static int
+mktemp_internal(char *path, int slen, int mode)
+{
+ char *start, *cp, *ep;
+ const char *tempchars = TEMPCHARS;
+ unsigned int r, tries;
+ struct stat sb;
+ size_t len;
+ int fd;
+
+ len = strlen(path);
+ if (len == 0 || slen < 0 || (size_t)slen >= len) {
+ errno = EINVAL;
+ return(-1);
+ }
+ ep = path + len - slen;
+
+ tries = 1;
+ for (start = ep; start > path && start[-1] == 'X'; start--) {
+ if (tries < INT_MAX / NUM_CHARS)
+ tries *= NUM_CHARS;
+ }
+ tries *= 2;
+
+ do {
+ for (cp = start; cp != ep; cp++) {
+ r = arc4random_uniform(NUM_CHARS);
+ *cp = tempchars[r];
+ }
+
+ switch (mode) {
+ case MKTEMP_NAME:
+ if (lstat(path, &sb) != 0)
+ return(errno == ENOENT ? 0 : -1);
+ break;
+ case MKTEMP_FILE:
+ fd = open(path, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR);
+ if (fd != -1 || errno != EEXIST)
+ return(fd);
+ break;
+ case MKTEMP_DIR:
+ if (mkdir(path, S_IRUSR|S_IWUSR|S_IXUSR) == 0)
+ return(0);
+ if (errno != EEXIST)
+ return(-1);
+ break;
+ }
+ } while (--tries);
+
+ errno = EEXIST;
+ return(-1);
+}
+
+#if 0
+char *_mktemp(char *);
+
+char *
+_mktemp(char *path)
+{
+ if (mktemp_internal(path, 0, MKTEMP_NAME) == -1)
+ return(NULL);
+ return(path);
+}
+
+__warn_references(mktemp,
+ "warning: mktemp() possibly used unsafely; consider using mkstemp()");
+
+char *
+mktemp(char *path)
+{
+ return(_mktemp(path));
+}
+#endif
+
+int
+mkstemp(char *path)
+{
+ return(mktemp_internal(path, 0, MKTEMP_FILE));
+}
+
+int
+mkstemps(char *path, int slen)
+{
+ return(mktemp_internal(path, slen, MKTEMP_FILE));
+}
+
+char *
+mkdtemp(char *path)
+{
+ int error;
+
+ error = mktemp_internal(path, 0, MKTEMP_DIR);
+ return(error ? NULL : path);
+}
+
+#endif /* !defined(HAVE_MKDTEMP) || defined(HAVE_STRICT_MKSTEMP) */