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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 14:37:38 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 14:37:38 +0000
commitae581a19fbe896a797450b9d9573fb66f2735227 (patch)
tree56c40be8518a29c9351364d13a9676aa83932dc0 /lib/iolog/iolog_mkdtemp.c
parentInitial commit. (diff)
downloadsudo-ae581a19fbe896a797450b9d9573fb66f2735227.tar.xz
sudo-ae581a19fbe896a797450b9d9573fb66f2735227.zip
Adding upstream version 1.9.13p3.upstream/1.9.13p3upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'lib/iolog/iolog_mkdtemp.c')
-rw-r--r--lib/iolog/iolog_mkdtemp.c99
1 files changed, 99 insertions, 0 deletions
diff --git a/lib/iolog/iolog_mkdtemp.c b/lib/iolog/iolog_mkdtemp.c
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+++ b/lib/iolog/iolog_mkdtemp.c
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+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 2009-2021 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>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <stdlib.h>
+#ifdef HAVE_STDBOOL_H
+# include <stdbool.h>
+#else
+# include "compat/stdbool.h"
+#endif
+#include <time.h>
+#include <errno.h>
+
+#include "sudo_compat.h"
+#include "sudo_debug.h"
+#include "sudo_fatal.h"
+#include "sudo_gettext.h"
+#include "sudo_util.h"
+#include "sudo_iolog.h"
+
+/*
+ * Create temporary directory and any parent directories as needed.
+ */
+bool
+iolog_mkdtemp(char *path)
+{
+ const mode_t iolog_filemode = iolog_get_file_mode();
+ const mode_t iolog_dirmode = iolog_get_dir_mode();
+ const uid_t iolog_uid = iolog_get_uid();
+ const gid_t iolog_gid = iolog_get_gid();
+ bool ok = false, uid_changed = false;
+ char *dir = sudo_basename(path);
+ mode_t omask;
+ int dfd;
+ debug_decl(iolog_mkdtemp, SUDO_DEBUG_UTIL);
+
+ /* umask must not be more restrictive than the file modes. */
+ omask = umask(ACCESSPERMS & ~(iolog_filemode|iolog_dirmode));
+
+ dfd = sudo_open_parent_dir(path, iolog_uid, iolog_gid, iolog_dirmode, true);
+ if (dfd == -1 && errno == EACCES) {
+ /* Try again as the I/O log owner (for NFS). */
+ uid_changed = iolog_swapids(false);
+ if (uid_changed)
+ dfd = sudo_open_parent_dir(path, -1, -1, iolog_dirmode, false);
+ }
+ if (dfd != -1) {
+ /* Create final path component. */
+ sudo_debug_printf(SUDO_DEBUG_DEBUG|SUDO_DEBUG_LINENO,
+ "mkdtemp %s", path);
+ /* We cannot retry mkdtemp() so always open as iolog user */
+ if (!uid_changed)
+ uid_changed = iolog_swapids(false);
+ if (mkdtempat(dfd, dir) == NULL) {
+ sudo_warn(U_("unable to mkdir %s"), path);
+ ok = false;
+ } else {
+ if (fchmodat(dfd, dir, iolog_dirmode, 0) != 0) {
+ /* Not a fatal error, pre-existing mode is 0700. */
+ sudo_warn(U_("unable to change mode of %s to 0%o"),
+ path, (unsigned int)iolog_dirmode);
+ }
+ ok = true;
+ }
+ close(dfd);
+ }
+
+ umask(omask);
+
+ if (uid_changed) {
+ if (!iolog_swapids(true))
+ ok = false;
+ }
+ debug_return_bool(ok);
+}