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Diffstat (limited to 'nss/nss_files/files-alias.c')
-rw-r--r--nss/nss_files/files-alias.c404
1 files changed, 0 insertions, 404 deletions
diff --git a/nss/nss_files/files-alias.c b/nss/nss_files/files-alias.c
deleted file mode 100644
index cf872bb603..0000000000
--- a/nss/nss_files/files-alias.c
+++ /dev/null
@@ -1,404 +0,0 @@
-/* Mail alias file parser in nss_files module.
- Copyright (C) 1996-2017 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
-
-#include <aliases.h>
-#include <ctype.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <libc-lock.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-
-#include <kernel-features.h>
-
-#include "nsswitch.h"
-
-/* Locks the static variables in this file. */
-__libc_lock_define_initialized (static, lock)
-
-/* Maintenance of the stream open on the database file. For getXXent
- operations the stream needs to be held open across calls, the other
- getXXbyYY operations all use their own stream. */
-
-static FILE *stream;
-
-
-static enum nss_status
-internal_setent (FILE **stream)
-{
- enum nss_status status = NSS_STATUS_SUCCESS;
-
- if (*stream == NULL)
- {
- *stream = fopen ("/etc/aliases", "rce");
-
- if (*stream == NULL)
- status = errno == EAGAIN ? NSS_STATUS_TRYAGAIN : NSS_STATUS_UNAVAIL;
- }
- else
- rewind (*stream);
-
- return status;
-}
-
-
-/* Thread-safe, exported version of that. */
-enum nss_status
-_nss_files_setaliasent (void)
-{
- enum nss_status status;
-
- __libc_lock_lock (lock);
-
- status = internal_setent (&stream);
-
- __libc_lock_unlock (lock);
-
- return status;
-}
-
-
-/* Close the database file. */
-static void
-internal_endent (FILE **stream)
-{
- if (*stream != NULL)
- {
- fclose (*stream);
- *stream = NULL;
- }
-}
-
-
-/* Thread-safe, exported version of that. */
-enum nss_status
-_nss_files_endaliasent (void)
-{
- __libc_lock_lock (lock);
-
- internal_endent (&stream);
-
- __libc_lock_unlock (lock);
-
- return NSS_STATUS_SUCCESS;
-}
-
-/* Parsing the database file into `struct aliasent' data structures. */
-static enum nss_status
-get_next_alias (FILE *stream, const char *match, struct aliasent *result,
- char *buffer, size_t buflen, int *errnop)
-{
- enum nss_status status = NSS_STATUS_NOTFOUND;
- int ignore = 0;
-
- result->alias_members_len = 0;
-
- while (1)
- {
- /* Now we are ready to process the input. We have to read a
- line and all its continuations and construct the array of
- string pointers. This pointers and the names itself have to
- be placed in BUFFER. */
- char *first_unused = buffer;
- size_t room_left = buflen - (buflen % __alignof__ (char *));
- char *line;
-
- /* Check whether the buffer is large enough for even trying to
- read something. */
- if (room_left < 2)
- goto no_more_room;
-
- /* Read the first line. It must contain the alias name and
- possibly some alias names. */
- first_unused[room_left - 1] = '\xff';
- line = fgets_unlocked (first_unused, room_left, stream);
- if (line == NULL)
- /* Nothing to read. */
- break;
- else if (first_unused[room_left - 1] != '\xff')
- {
- /* The line is too long for our buffer. */
- no_more_room:
- *errnop = ERANGE;
- status = NSS_STATUS_TRYAGAIN;
- break;
- }
- else
- {
- char *cp;
-
- /* If we are in IGNORE mode and the first character in the
- line is a white space we ignore the line and start
- reading the next. */
- if (ignore && isspace (*first_unused))
- continue;
-
- /* Terminate the line for any case. */
- cp = strpbrk (first_unused, "#\n");
- if (cp != NULL)
- *cp = '\0';
-
- /* Skip leading blanks. */
- while (isspace (*line))
- ++line;
-
- result->alias_name = first_unused;
- while (*line != '\0' && *line != ':')
- *first_unused++ = *line++;
- if (*line == '\0' || result->alias_name == first_unused)
- /* No valid name. Ignore the line. */
- continue;
-
- *first_unused++ = '\0';
- if (room_left < (size_t) (first_unused - result->alias_name))
- goto no_more_room;
- room_left -= first_unused - result->alias_name;
- ++line;
-
- /* When we search for a specific alias we can avoid all the
- difficult parts and compare now with the name we are
- looking for. If it does not match we simply ignore all
- lines until the next line containing the start of a new
- alias is found. */
- ignore = (match != NULL
- && __strcasecmp (result->alias_name, match) != 0);
-
- while (! ignore)
- {
- while (isspace (*line))
- ++line;
-
- cp = first_unused;
- while (*line != '\0' && *line != ',')
- *first_unused++ = *line++;
-
- if (first_unused != cp)
- {
- /* OK, we can have a regular entry or an include
- request. */
- if (*line != '\0')
- ++line;
- *first_unused++ = '\0';
-
- if (strncmp (cp, ":include:", 9) != 0)
- {
- if (room_left < (first_unused - cp) + sizeof (char *))
- goto no_more_room;
- room_left -= (first_unused - cp) + sizeof (char *);
-
- ++result->alias_members_len;
- }
- else
- {
- /* Oh well, we have to read the addressed file. */
- FILE *listfile;
- char *old_line = NULL;
-
- first_unused = cp;
-
- listfile = fopen (&cp[9], "rce");
- /* If the file does not exist we simply ignore
- the statement. */
- if (listfile != NULL
- && (old_line = strdup (line)) != NULL)
- {
- while (! feof_unlocked (listfile))
- {
- first_unused[room_left - 1] = '\xff';
- line = fgets_unlocked (first_unused, room_left,
- listfile);
- if (line == NULL)
- break;
- if (first_unused[room_left - 1] != '\xff')
- {
- free (old_line);
- goto no_more_room;
- }
-
- /* Parse the line. */
- cp = strpbrk (line, "#\n");
- if (cp != NULL)
- *cp = '\0';
-
- do
- {
- while (isspace (*line))
- ++line;
-
- cp = first_unused;
- while (*line != '\0' && *line != ',')
- *first_unused++ = *line++;
-
- if (*line != '\0')
- ++line;
-
- if (first_unused != cp)
- {
- *first_unused++ = '\0';
- if (room_left < ((first_unused - cp)
- + __alignof__ (char *)))
- {
- free (old_line);
- goto no_more_room;
- }
- room_left -= ((first_unused - cp)
- + __alignof__ (char *));
- ++result->alias_members_len;
- }
- }
- while (*line != '\0');
- }
- fclose (listfile);
-
- first_unused[room_left - 1] = '\0';
- strncpy (first_unused, old_line, room_left);
-
- free (old_line);
- line = first_unused;
-
- if (first_unused[room_left - 1] != '\0')
- goto no_more_room;
- }
- }
- }
-
- if (*line == '\0')
- {
- /* Get the next line. But we must be careful. We
- must not read the whole line at once since it
- might belong to the current alias. Simply read
- the first character. If it is a white space we
- have a continuation line. Otherwise it is the
- beginning of a new alias and we can push back the
- just read character. */
- int ch;
-
- ch = fgetc_unlocked (stream);
- if (ch == EOF || ch == '\n' || !isspace (ch))
- {
- size_t cnt;
-
- /* Now prepare the return. Provide string
- pointers for the currently selected aliases. */
- if (ch != EOF)
- ungetc (ch, stream);
-
- /* Adjust the pointer so it is aligned for
- storing pointers. */
- first_unused += __alignof__ (char *) - 1;
- first_unused -= ((first_unused - (char *) 0)
- % __alignof__ (char *));
- result->alias_members = (char **) first_unused;
-
- /* Compute addresses of alias entry strings. */
- cp = result->alias_name;
- for (cnt = 0; cnt < result->alias_members_len; ++cnt)
- {
- cp = strchr (cp, '\0') + 1;
- result->alias_members[cnt] = cp;
- }
-
- status = (result->alias_members_len == 0
- ? NSS_STATUS_RETURN : NSS_STATUS_SUCCESS);
- break;
- }
-
- /* The just read character is a white space and so
- can be ignored. */
- first_unused[room_left - 1] = '\xff';
- line = fgets_unlocked (first_unused, room_left, stream);
- if (first_unused[room_left - 1] != '\xff')
- goto no_more_room;
- cp = strpbrk (line, "#\n");
- if (cp != NULL)
- *cp = '\0';
- }
- }
- }
-
- if (status != NSS_STATUS_NOTFOUND)
- /* We read something. In any case break here. */
- break;
- }
-
- return status;
-}
-
-
-enum nss_status
-_nss_files_getaliasent_r (struct aliasent *result, char *buffer, size_t buflen,
- int *errnop)
-{
- /* Return next entry in host file. */
- enum nss_status status = NSS_STATUS_SUCCESS;
-
- __libc_lock_lock (lock);
-
- /* Be prepared that the set*ent function was not called before. */
- if (stream == NULL)
- status = internal_setent (&stream);
-
- if (status == NSS_STATUS_SUCCESS)
- {
- result->alias_local = 1;
-
- /* Read lines until we get a definite result. */
- do
- status = get_next_alias (stream, NULL, result, buffer, buflen, errnop);
- while (status == NSS_STATUS_RETURN);
- }
-
- __libc_lock_unlock (lock);
-
- return status;
-}
-
-
-enum nss_status
-_nss_files_getaliasbyname_r (const char *name, struct aliasent *result,
- char *buffer, size_t buflen, int *errnop)
-{
- /* Return next entry in host file. */
- enum nss_status status = NSS_STATUS_SUCCESS;
- FILE *stream = NULL;
-
- if (name == NULL)
- {
- __set_errno (EINVAL);
- return NSS_STATUS_UNAVAIL;
- }
-
- /* Open the stream. */
- status = internal_setent (&stream);
-
- if (status == NSS_STATUS_SUCCESS)
- {
- result->alias_local = 1;
-
- /* Read lines until we get a definite result. */
- do
- status = get_next_alias (stream, name, result, buffer, buflen, errnop);
- while (status == NSS_STATUS_RETURN);
- }
-
- internal_endent (&stream);
-
- return status;
-}
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