diff options
Diffstat (limited to 'plugins/sudoers/sudoers_debug.c')
| -rw-r--r-- | plugins/sudoers/sudoers_debug.c | 162 |
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; + } +} |