1 files changed, 135 insertions, 0 deletions
diff --git a/plugins/sudoers/sudoers_debug.c b/plugins/sudoers/sudoers_debug.c
new file mode 100644
index 0000000..471ea8c
--- /dev/null
+++ b/plugins/sudoers/sudoers_debug.c
@@ -0,0 +1,135 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * 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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "sudoers.h"
+
+static int sudoers_debug_instance = SUDO_DEBUG_INSTANCE_INITIALIZER;
+static unsigned int sudoers_debug_refcnt;
+
+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)
+{
+    /* Already initialized? */
+    if (sudoers_debug_instance != SUDO_DEBUG_INSTANCE_INITIALIZER)
+	return true;
+
+    return sudo_debug_parse_flags(debug_files, entry) != -1;
+}
+
+/*
+ * 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)
+{
+    int instance = sudoers_debug_instance;
+    struct sudo_debug_file *debug_file, *debug_next;
+
+    /* Setup debugging if indicated. */
+    if (debug_files != NULL && !TAILQ_EMPTY(debug_files)) {
+	if (program != NULL) {
+	    instance = sudo_debug_register(program, sudoers_subsystem_names,
+		sudoers_subsystem_ids, debug_files, -1);
+	}
+	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);
+	}
+    }
+
+    switch (instance) {
+    case SUDO_DEBUG_INSTANCE_ERROR:
+	return false;
+    case SUDO_DEBUG_INSTANCE_INITIALIZER:
+	/* Nothing to do */
+	break;
+    default:
+	/* New debug instance or additional reference on existing one. */
+	sudoers_debug_instance = instance;
+	sudo_debug_set_active_instance(sudoers_debug_instance);
+	sudoers_debug_refcnt++;
+	break;
+    }
+
+    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_refcnt != 0) {
+	sudo_debug_exit(__func__, __FILE__, __LINE__, sudo_debug_subsys);
+	if (--sudoers_debug_refcnt == 0) {
+	    if (sudo_debug_deregister(sudoers_debug_instance) < 1)
+		sudoers_debug_instance = SUDO_DEBUG_INSTANCE_INITIALIZER;
+	}
+    }
+}