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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 12:52:13 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 12:52:13 +0000
commitf8e5c55a036f0e2e2a958e30456270f3f9eba933 (patch)
tree4a06ff510774a7a3373e492df4e2984d7b0664b1 /plugins/sudoers/file.c
parentInitial commit. (diff)
downloadsudo-f8e5c55a036f0e2e2a958e30456270f3f9eba933.tar.xz
sudo-f8e5c55a036f0e2e2a958e30456270f3f9eba933.zip
Adding upstream version 1.9.5p2.upstream/1.9.5p2upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'plugins/sudoers/file.c')
-rw-r--r--plugins/sudoers/file.c152
1 files changed, 152 insertions, 0 deletions
diff --git a/plugins/sudoers/file.c b/plugins/sudoers/file.c
new file mode 100644
index 0000000..5b12b8f
--- /dev/null
+++ b/plugins/sudoers/file.c
@@ -0,0 +1,152 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 2004-2005, 2007-2018 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 <stdio.h>
+#include <stdlib.h>
+
+#include "sudoers.h"
+#include "parse.h"
+#include "sudo_lbuf.h"
+#include <gram.h>
+
+struct sudo_file_handle {
+ FILE *fp;
+ struct sudoers_parse_tree parse_tree;
+};
+
+static int
+sudo_file_close(struct sudo_nss *nss)
+{
+ debug_decl(sudo_file_close, SUDOERS_DEBUG_NSS);
+ struct sudo_file_handle *handle = nss->handle;
+
+ if (handle != NULL) {
+ fclose(handle->fp);
+ sudoersin = NULL;
+
+ free_parse_tree(&handle->parse_tree);
+ free(handle);
+ nss->handle = NULL;
+ }
+
+ debug_return_int(0);
+}
+
+static int
+sudo_file_open(struct sudo_nss *nss)
+{
+ debug_decl(sudo_file_open, SUDOERS_DEBUG_NSS);
+ struct sudo_file_handle *handle;
+
+ if (def_ignore_local_sudoers)
+ debug_return_int(-1);
+
+ if (nss->handle != NULL) {
+ sudo_debug_printf(SUDO_DEBUG_ERROR,
+ "%s: called with non-NULL handle %p", __func__, nss->handle);
+ sudo_file_close(nss);
+ }
+
+ handle = malloc(sizeof(*handle));
+ if (handle != NULL) {
+ handle->fp = open_sudoers(sudoers_file, false, NULL);
+ if (handle->fp != NULL) {
+ init_parse_tree(&handle->parse_tree, NULL, NULL);
+ } else {
+ free(handle);
+ handle = NULL;
+ }
+ }
+ nss->handle = handle;
+ debug_return_int(nss->handle ? 0 : -1);
+}
+
+/*
+ * Parse and return the specified sudoers file.
+ */
+static struct sudoers_parse_tree *
+sudo_file_parse(struct sudo_nss *nss)
+{
+ debug_decl(sudo_file_close, SUDOERS_DEBUG_NSS);
+ struct sudo_file_handle *handle = nss->handle;
+ int error;
+
+ if (handle == NULL || handle->fp == NULL) {
+ sudo_debug_printf(SUDO_DEBUG_ERROR, "%s: called with NULL %s",
+ __func__, handle ? "file pointer" : "handle");
+ debug_return_ptr(NULL);
+ }
+
+ sudoersin = handle->fp;
+ error = sudoersparse();
+ if (error || parse_error) {
+ if (errorlineno != -1) {
+ log_warningx(SLOG_SEND_MAIL|SLOG_NO_STDERR,
+ N_("parse error in %s near line %d"), errorfile, errorlineno);
+ } else {
+ log_warningx(SLOG_SEND_MAIL|SLOG_NO_STDERR,
+ N_("parse error in %s"), errorfile);
+ }
+ if (error || !sudoers_recovery) {
+ /* unrecoverable error */
+ debug_return_ptr(NULL);
+ }
+ }
+
+ /* Move parsed sudoers policy to nss handle. */
+ reparent_parse_tree(&handle->parse_tree);
+
+ debug_return_ptr(&handle->parse_tree);
+}
+
+/*
+ * No need for explicit sudoers queries, the parse function handled it.
+ */
+static int
+sudo_file_query(struct sudo_nss *nss, struct passwd *pw)
+{
+ debug_decl(sudo_file_query, SUDOERS_DEBUG_NSS);
+ debug_return_int(0);
+}
+
+/*
+ * No need to get defaults for sudoers file, the parse function handled it.
+ */
+static int
+sudo_file_getdefs(struct sudo_nss *nss)
+{
+ debug_decl(sudo_file_getdefs, SUDOERS_DEBUG_NSS);
+ debug_return_int(0);
+}
+
+/* sudo_nss implementation */
+struct sudo_nss sudo_nss_file = {
+ { NULL, NULL },
+ sudo_file_open,
+ sudo_file_close,
+ sudo_file_parse,
+ sudo_file_query,
+ sudo_file_getdefs
+};