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authorMounir IDRASSI <mounir.idrassi@idrix.fr>2016-09-15 10:04:05 +0200
committerMounir IDRASSI <mounir.idrassi@idrix.fr>2016-10-17 18:40:06 +0200
commit4dacedd9ccdbdc6a6e62d9fb86e9b2ea903a3629 (patch)
tree567350f56dd4ee4dd291d13199610d38dac51879 /src/Common/libzip/mkstemp.c
parent66891638d51351fae5cd82a88c1a64661a025de0 (diff)
downloadVeraCrypt-4dacedd9ccdbdc6a6e62d9fb86e9b2ea903a3629.tar.gz
VeraCrypt-4dacedd9ccdbdc6a6e62d9fb86e9b2ea903a3629.zip
Windows: Replace XZip/XUnzip library with zlib and libzip and include the sources of these library into VeraCrypt source tree.
Diffstat (limited to 'src/Common/libzip/mkstemp.c')
-rw-r--r--src/Common/libzip/mkstemp.c150
1 files changed, 150 insertions, 0 deletions
diff --git a/src/Common/libzip/mkstemp.c b/src/Common/libzip/mkstemp.c
new file mode 100644
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+++ b/src/Common/libzip/mkstemp.c
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+/* Adapted from NetBSB libc by Dieter Baron */
+
+/* NetBSD: gettemp.c,v 1.13 2003/12/05 00:57:36 uebayasi Exp */
+
+/*
+ * 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. 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.
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <assert.h>
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#ifdef _WIN32
+#include <io.h>
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+
+
+int
+_zip_mkstemp(char *path)
+{
+#ifdef _WIN32
+ int ret;
+ ret = _creat(_mktemp(path), _S_IREAD|_S_IWRITE);
+ if (ret == -1) {
+ return 0;
+ } else {
+ return ret;
+ }
+#else
+ int fd;
+ char *start, *trv;
+ struct stat sbuf;
+ pid_t pid;
+
+ /* To guarantee multiple calls generate unique names even if
+ the file is not created. 676 different possibilities with 7
+ or more X's, 26 with 6 or less. */
+ static char xtra[2] = "aa";
+ int xcnt = 0;
+
+ pid = getpid();
+
+ /* Move to end of path and count trailing X's. */
+ for (trv = path; *trv; ++trv)
+ if (*trv == 'X')
+ xcnt++;
+ else
+ xcnt = 0;
+
+ /* Use at least one from xtra. Use 2 if more than 6 X's. */
+ if (*(trv - 1) == 'X')
+ *--trv = xtra[0];
+ if (xcnt > 6 && *(trv - 1) == 'X')
+ *--trv = xtra[1];
+
+ /* Set remaining X's to pid digits with 0's to the left. */
+ while (*--trv == 'X') {
+ *trv = (pid % 10) + '0';
+ pid /= 10;
+ }
+
+ /* update xtra for next call. */
+ if (xtra[0] != 'z')
+ xtra[0]++;
+ else {
+ xtra[0] = 'a';
+ if (xtra[1] != 'z')
+ xtra[1]++;
+ else
+ xtra[1] = 'a';
+ }
+
+ /*
+ * 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 ((fd=open(path, O_CREAT|O_EXCL|O_RDWR|O_BINARY, 0600)) >= 0)
+ return (fd);
+ if (errno != EEXIST)
+ return (0);
+
+ /* tricky little algorithm for backward compatibility */
+ for (trv = start;;) {
+ if (!*trv)
+ return (0);
+ if (*trv == 'z')
+ *trv++ = 'a';
+ else {
+ if (isdigit((unsigned char)*trv))
+ *trv = 'a';
+ else
+ ++*trv;
+ break;
+ }
+ }
+ }
+ /*NOTREACHED*/
+#endif
+}