Adding upstream version 1.9.13p3.upstream/1.9.13p3upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 172 insertions, 0 deletions

diff --git a/lib/util/mktemp.c b/lib/util/mktemp.c
new file mode 100644
index 0000000..1540e51
--- /dev/null
+++ b/lib/util/mktemp.c
@@ -0,0 +1,172 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 2001, 2003, 2004, 2008-2011, 2013, 2015, 2017, 2018, 2022
+ *	Todd C. Miller <Todd.Miller@sudo.ws>
+ *
+ * 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.
+ */
+
+/*
+ * This is an open source non-commercial project. Dear PVS-Studio, please check it.
+ * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+ */
+
+#include <config.h>
+
+#if (!defined(HAVE_MKDTEMPAT) && !defined(HAVE_MKDTEMPAT_NP)) || \
+    (!defined(HAVE_MKOSTEMPSAT) && !defined(HAVE_MKOSTEMPSAT_NP))
+
+#include <sys/stat.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#if defined(HAVE_STDINT_H)
+# include <stdint.h>
+#elif defined(HAVE_INTTYPES_H)
+# include <inttypes.h>
+#endif
+#include <string.h>
+#include <ctype.h>
+#include <unistd.h>
+
+#include "sudo_compat.h"
+#include "sudo_rand.h"
+#include "pathnames.h"
+
+#define MKTEMP_FILE	1
+#define MKTEMP_DIR	2
+
+#define TEMPCHARS	"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
+#define NUM_CHARS	(sizeof(TEMPCHARS) - 1)
+#define MIN_X		6
+
+#define MKOTEMP_FLAGS	(O_APPEND | O_CLOEXEC | O_SYNC)
+
+static int
+mktemp_internal(int dfd, char *path, int slen, int mode, int flags)
+{
+	char *start, *cp, *ep;
+	const char tempchars[] = TEMPCHARS;
+	unsigned int tries;
+	size_t len;
+	int fd;
+
+	len = strlen(path);
+	if (len < MIN_X || slen < 0 || (size_t)slen > len - MIN_X) {
+		errno = EINVAL;
+		return -1;
+	}
+	ep = path + len - slen;
+
+	for (start = ep; start > path && start[-1] == 'X'; start--)
+		;
+	if (ep - start < MIN_X) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	if (flags & ~MKOTEMP_FLAGS) {
+		errno = EINVAL;
+		return -1;
+	}
+	flags |= O_CREAT | O_EXCL | O_RDWR;
+
+	tries = INT_MAX;
+	do {
+		cp = start;
+		do {
+			unsigned short rbuf[16];
+			unsigned int i;
+
+			/*
+			 * Avoid lots of arc4random() calls by using
+			 * a buffer sized for up to 16 Xs at a time.
+			 */
+			arc4random_buf(rbuf, sizeof(rbuf));
+			for (i = 0; i < nitems(rbuf) && cp != ep; i++)
+				*cp++ = tempchars[rbuf[i] % NUM_CHARS];
+		} while (cp != ep);
+
+		switch (mode) {
+		case MKTEMP_FILE:
+			fd = openat(dfd, path, flags, S_IRUSR|S_IWUSR);
+			if (fd != -1 || errno != EEXIST)
+				return fd;
+			break;
+		case MKTEMP_DIR:
+			if (mkdirat(dfd, path, S_IRWXU) == 0)
+				return 0;
+			if (errno != EEXIST)
+				return -1;
+			break;
+		}
+	} while (--tries);
+
+	errno = EEXIST;
+	return -1;
+}
+
+char *
+sudo_mkdtemp(char *path)
+{
+	if (mktemp_internal(AT_FDCWD, path, 0, MKTEMP_DIR, 0) == -1)
+		return NULL;
+	return path;
+}
+
+char *
+sudo_mkdtempat(int dfd, char *path)
+{
+	if (mktemp_internal(dfd, path, 0, MKTEMP_DIR, 0) == -1)
+		return NULL;
+	return path;
+}
+
+int
+sudo_mkostempsat(int dfd, char *path, int slen, int flags)
+{
+	return mktemp_internal(dfd, path, slen, MKTEMP_FILE, flags);
+}
+
+#ifdef notyet
+int
+sudo_mkostemps(char *path, int slen, int flags)
+{
+	return mktemp_internal(AT_FDCWD, path, slen, MKTEMP_FILE, flags);
+}
+#endif
+
+int
+sudo_mkstemp(char *path)
+{
+	return mktemp_internal(AT_FDCWD, path, 0, MKTEMP_FILE, 0);
+}
+
+#ifdef notyet
+int
+sudo_mkostemp(char *path, int flags)
+{
+	return mktemp_internal(AT_FDCWD, path, 0, MKTEMP_FILE, flags);
+}
+#endif
+
+int
+sudo_mkstemps(char *path, int slen)
+{
+	return mktemp_internal(AT_FDCWD, path, slen, MKTEMP_FILE, 0);
+}
+#endif /* !HAVE_MKDTEMPAT || !HAVE_MKOSTEMPSAT */