mirror of
https://github.com/sudo-project/sudo.git
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f9be3a48a2
in a per-nss list of userspecs and defaults instead of using separate lookup and list functions. This makes it possible to have a single implementation of the code for sudoers lookup and listing.
146 lines
3.8 KiB
C
146 lines
3.8 KiB
C
/*
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* Copyright (c) 2004-2005, 2007-2018 Todd C. Miller <Todd.Miller@sudo.ws>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <config.h>
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#include <sys/types.h>
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#include <stdio.h>
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#include <stdlib.h>
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#ifdef HAVE_STRING_H
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# include <string.h>
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#endif /* HAVE_STRING_H */
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#ifdef HAVE_STRINGS_H
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# include <strings.h>
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#endif /* HAVE_STRINGS_H */
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#include <unistd.h>
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#include <ctype.h>
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#include <grp.h>
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#include <pwd.h>
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#include <time.h>
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#include "sudoers.h"
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#include "parse.h"
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#include "sudo_lbuf.h"
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#include <gram.h>
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/*
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* Local prototypes.
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*/
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static int sudo_file_close(struct sudo_nss *);
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static int sudo_file_open(struct sudo_nss *);
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static int sudo_file_parse(struct sudo_nss *);
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static int sudo_file_query(struct sudo_nss *, struct passwd *pw);
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static int sudo_file_getdefs(struct sudo_nss *);
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/* sudo_nss implementation */
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struct sudo_nss sudo_nss_file = {
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{ NULL, NULL },
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sudo_file_open,
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sudo_file_close,
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sudo_file_parse,
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sudo_file_query,
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sudo_file_getdefs
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};
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static int
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sudo_file_open(struct sudo_nss *nss)
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{
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debug_decl(sudo_file_open, SUDOERS_DEBUG_NSS)
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if (def_ignore_local_sudoers)
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debug_return_int(-1);
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nss->handle = open_sudoers(sudoers_file, false, NULL);
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debug_return_int(nss->handle ? 0 : -1);
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}
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static int
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sudo_file_close(struct sudo_nss *nss)
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{
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struct member_list *prev_binding = NULL;
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struct defaults *def;
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struct userspec *us;
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debug_decl(sudo_file_close, SUDOERS_DEBUG_NSS)
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if (nss->handle != NULL) {
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fclose(nss->handle);
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nss->handle = NULL;
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sudoersin = NULL;
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/* XXX - do in main module? */
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while ((us = TAILQ_FIRST(&nss->userspecs)) != NULL) {
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TAILQ_REMOVE(&nss->userspecs, us, entries);
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free_userspec(us);
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}
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while ((def = TAILQ_FIRST(&nss->defaults)) != NULL) {
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TAILQ_REMOVE(&nss->defaults, def, entries);
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free_default(def, &prev_binding);
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}
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}
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debug_return_int(0);
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}
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/*
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* Parse the specified sudoers file.
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*/
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static int
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sudo_file_parse(struct sudo_nss *nss)
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{
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debug_decl(sudo_file_close, SUDOERS_DEBUG_NSS)
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if (nss->handle == NULL)
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debug_return_int(-1);
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sudoersin = nss->handle;
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if (sudoersparse() != 0 || parse_error) {
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if (errorlineno != -1) {
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log_warningx(SLOG_SEND_MAIL, N_("parse error in %s near line %d"),
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errorfile, errorlineno);
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} else {
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log_warningx(SLOG_SEND_MAIL, N_("parse error in %s"), errorfile);
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}
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debug_return_int(-1);
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}
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/* Move parsed userspecs and defaults to nss structure. */
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TAILQ_CONCAT(&nss->userspecs, &userspecs, entries);
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TAILQ_CONCAT(&nss->defaults, &defaults, entries);
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debug_return_int(0);
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}
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/*
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* No need for explicit queries for sudoers file, we have it all in memory.
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*/
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static int
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sudo_file_query(struct sudo_nss *nss, struct passwd *pw)
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{
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debug_decl(sudo_file_query, SUDOERS_DEBUG_NSS)
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debug_return_int(0);
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}
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/*
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* No need to get defaults for sudoers file, the parse function handled it.
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*/
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static int
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sudo_file_getdefs(struct sudo_nss *nss)
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{
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debug_decl(sudo_file_getdefs, SUDOERS_DEBUG_NSS)
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debug_return_int(0);
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}
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