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-rw-r--r--plugins/sudoers/sudoers_debug.c162
1 files changed, 162 insertions, 0 deletions
diff --git a/plugins/sudoers/sudoers_debug.c b/plugins/sudoers/sudoers_debug.c
new file mode 100644
index 0000000..d09ec12
--- /dev/null
+++ b/plugins/sudoers/sudoers_debug.c
@@ -0,0 +1,162 @@
+/*
+ * Copyright (c) 2014-2015 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 <stdio.h>
+#include <stdlib.h>
+#ifdef HAVE_STDBOOL_H
+# include <stdbool.h>
+#else
+# include "compat/stdbool.h"
+#endif
+#ifdef HAVE_STRING_H
+# include <string.h>
+#endif /* HAVE_STRING_H */
+#ifdef HAVE_STRINGS_H
+# include <strings.h>
+#endif /* HAVE_STRINGS_H */
+#include <unistd.h>
+#include <ctype.h>
+
+#include "sudoers.h"
+
+static int sudoers_debug_instance = SUDO_DEBUG_INSTANCE_INITIALIZER;
+
+static const char *const sudoers_subsystem_names[] = {
+ "alias",
+ "audit",
+ "auth",
+ "defaults",
+ "env",
+ "event",
+ "ldap",
+ "logging",
+ "main",
+ "match",
+ "netif",
+ "nss",
+ "parser",
+ "perms",
+ "plugin",
+ "rbtree",
+ "sssd",
+ "util",
+ NULL
+};
+
+#define NUM_SUBSYSTEMS (nitems(sudoers_subsystem_names) - 1)
+
+/* Subsystem IDs assigned at registration time. */
+unsigned int sudoers_subsystem_ids[NUM_SUBSYSTEMS];
+
+/*
+ * Parse the "filename flags,..." debug_flags entry and insert a new
+ * sudo_debug_file struct into debug_files.
+ */
+bool
+sudoers_debug_parse_flags(struct sudo_conf_debug_file_list *debug_files,
+ const char *entry)
+{
+ struct sudo_debug_file *debug_file;
+ const char *filename, *flags;
+ size_t namelen;
+
+ /* Already initialized? */
+ if (sudoers_debug_instance != SUDO_DEBUG_INSTANCE_INITIALIZER)
+ return true;
+
+ /* Only process new-style debug flags: filename flags,... */
+ filename = entry;
+ if (*filename != '/' || (flags = strpbrk(filename, " \t")) == NULL)
+ return true;
+ namelen = (size_t)(flags - filename);
+ while (isblank((unsigned char)*flags))
+ flags++;
+ if (*flags != '\0') {
+ if ((debug_file = calloc(1, sizeof(*debug_file))) == NULL)
+ goto oom;
+ if ((debug_file->debug_file = strndup(filename, namelen)) == NULL)
+ goto oom;
+ if ((debug_file->debug_flags = strdup(flags)) == NULL)
+ goto oom;
+ TAILQ_INSERT_TAIL(debug_files, debug_file, entries);
+ }
+ return true;
+oom:
+ if (debug_file != NULL) {
+ free(debug_file->debug_file);
+ free(debug_file->debug_flags);
+ free(debug_file);
+ }
+ sudo_warnx_nodebug(U_("%s: %s"), "sudoers_debug_parse_flags",
+ U_("unable to allocate memory"));
+ return false;
+}
+
+/*
+ * Register the specified debug files and program with the
+ * debug subsystem, freeing the debug list when done.
+ * Sets the active debug instance as a side effect.
+ */
+bool
+sudoers_debug_register(const char *program,
+ struct sudo_conf_debug_file_list *debug_files)
+{
+ struct sudo_debug_file *debug_file, *debug_next;
+
+ /* Already initialized? */
+ if (sudoers_debug_instance != SUDO_DEBUG_INSTANCE_INITIALIZER) {
+ sudo_debug_set_active_instance(sudoers_debug_instance);
+ }
+
+ /* Setup debugging if indicated. */
+ if (debug_files != NULL && !TAILQ_EMPTY(debug_files)) {
+ if (program != NULL) {
+ sudoers_debug_instance = sudo_debug_register(program,
+ sudoers_subsystem_names, sudoers_subsystem_ids, debug_files);
+ if (sudoers_debug_instance == SUDO_DEBUG_INSTANCE_ERROR)
+ return false;
+ }
+ TAILQ_FOREACH_SAFE(debug_file, debug_files, entries, debug_next) {
+ TAILQ_REMOVE(debug_files, debug_file, entries);
+ free(debug_file->debug_file);
+ free(debug_file->debug_flags);
+ free(debug_file);
+ }
+ }
+ return true;
+}
+
+/*
+ * Deregister sudoers_debug_instance if it is registered.
+ */
+void
+sudoers_debug_deregister(void)
+{
+ debug_decl(sudoers_debug_deregister, SUDOERS_DEBUG_PLUGIN)
+ if (sudoers_debug_instance != SUDO_DEBUG_INSTANCE_INITIALIZER) {
+ sudo_debug_exit(__func__, __FILE__, __LINE__, sudo_debug_subsys);
+ sudo_debug_deregister(sudoers_debug_instance);
+ sudoers_debug_instance = SUDO_DEBUG_INSTANCE_INITIALIZER;
+ }
+}