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Diffstat (limited to 'nis/nss_nis/nis-alias.c')
-rw-r--r--nis/nss_nis/nis-alias.c269
1 files changed, 269 insertions, 0 deletions
diff --git a/nis/nss_nis/nis-alias.c b/nis/nss_nis/nis-alias.c
new file mode 100644
index 0000000000..af83d9cd7c
--- /dev/null
+++ b/nis/nss_nis/nis-alias.c
@@ -0,0 +1,269 @@
+/* Copyright (C) 1996 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1996.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <nss.h>
+#include <ctype.h>
+#include <errno.h>
+#include <string.h>
+#include <aliases.h>
+#include <libc-lock.h>
+#include <rpcsvc/yp.h>
+#include <rpcsvc/ypclnt.h>
+
+#include "nss-nis.h"
+
+__libc_lock_define_initialized (static, lock)
+
+static bool_t new_start = 1;
+static char *oldkey = NULL;
+static int oldkeylen = 0;
+
+static int
+_nss_nis_parse_aliasent (char *key, char *alias, struct aliasent *result,
+ char *buffer, size_t buflen)
+{
+ char *first_unused = buffer + strlen (alias) + 1;
+ size_t room_left =
+ buflen - (buflen % __alignof__ (char *)) - strlen (alias) - 2;
+ char *line;
+ char *cp;
+
+ result->alias_members_len = 0;
+ *first_unused = '\0';
+ first_unused++;
+ strcpy (first_unused, key);
+
+ if (first_unused[room_left - 1] != '\0')
+ {
+ /* The line is too long for our buffer. */
+ no_more_room:
+ __set_errno (ERANGE);
+ return -1;
+ }
+
+ result->alias_name = first_unused;
+
+ /* Terminate the line for any case. */
+ cp = strpbrk (alias, "#\n");
+ if (cp != NULL)
+ *cp = '\0';
+
+ first_unused += strlen (result->alias_name) + 1;
+ /* 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;
+
+ line = alias;
+
+ while (*line != '\0')
+ {
+ /* Skip leading blanks. */
+ while (isspace (*line))
+ line++;
+
+ if (*line == '\0')
+ break;
+
+ if (room_left < sizeof (char *))
+ goto no_more_room;
+ room_left -= sizeof (char *);
+ result->alias_members[result->alias_members_len] = line;
+
+ while (*line != '\0' && *line != ',')
+ line++;
+
+ if (line != result->alias_members[result->alias_members_len])
+ {
+ *line = '\0';
+ line++;
+ result->alias_members_len++;
+ }
+ }
+ return result->alias_members_len == 0 ? 0 : 1;
+}
+
+enum nss_status
+_nss_nis_setaliasent (void)
+{
+ __libc_lock_lock (lock);
+
+ new_start = 1;
+ if (oldkey != NULL)
+ {
+ free (oldkey);
+ oldkey = NULL;
+ oldkeylen = 0;
+ }
+
+ __libc_lock_unlock (lock);
+
+ return NSS_STATUS_SUCCESS;
+}
+
+enum nss_status
+_nss_nis_endaliasent (void)
+{
+ __libc_lock_lock (lock);
+
+ new_start = 1;
+ if (oldkey != NULL)
+ {
+ free (oldkey);
+ oldkey = NULL;
+ oldkeylen = 0;
+ }
+
+ __libc_lock_unlock (lock);
+
+ return NSS_STATUS_SUCCESS;
+}
+
+static enum nss_status
+internal_nis_getaliasent_r (struct aliasent *alias, char *buffer,
+ size_t buflen)
+{
+ char *domain;
+ char *result;
+ int len;
+ char *outkey;
+ int keylen;
+ char *p;
+ int parse_res;
+
+ if (yp_get_default_domain (&domain))
+ return NSS_STATUS_UNAVAIL;
+
+ alias->alias_local = 0;
+
+ /* Get the next entry until we found a correct one. */
+ do
+ {
+ enum nss_status retval;
+
+ if (new_start)
+ retval = yperr2nss (yp_first (domain, "mail.aliases",
+ &outkey, &keylen, &result, &len));
+ else
+ retval = yperr2nss ( yp_next (domain, "mail.aliases", oldkey,
+ oldkeylen, &outkey, &keylen,
+ &result, &len));
+ if (retval != NSS_STATUS_SUCCESS)
+ {
+ if (retval == NSS_STATUS_TRYAGAIN)
+ __set_errno (EAGAIN);
+ return retval;
+ }
+
+ if (len + 1 > buflen)
+ {
+ free (result);
+ __set_errno (ERANGE);
+ return NSS_STATUS_TRYAGAIN;
+ }
+ p = strncpy (buffer, result, len);
+ buffer[len] = '\0';
+ while (isspace (*p))
+ ++p;
+ free (result);
+
+ parse_res = _nss_nis_parse_aliasent (outkey, p, alias, buffer, buflen);
+ if (parse_res == -1)
+ {
+ __set_errno (ERANGE);
+ return NSS_STATUS_TRYAGAIN;
+ }
+
+ free (oldkey);
+ oldkey = outkey;
+ oldkeylen = keylen;
+ new_start = 0;
+ }
+ while (!parse_res);
+
+ return NSS_STATUS_SUCCESS;
+}
+
+enum nss_status
+_nss_nis_getaliasent_r (struct aliasent *alias, char *buffer, size_t buflen)
+{
+ enum nss_status status;
+
+ __libc_lock_lock (lock);
+
+ status = internal_nis_getaliasent_r (alias, buffer, buflen);
+
+ __libc_lock_unlock (lock);
+
+ return status;
+}
+
+enum nss_status
+_nss_nis_getaliasbyname_r (const char *name, struct aliasent *alias,
+ char *buffer, size_t buflen)
+{
+ enum nss_status retval;
+ int parse_res;
+ char *domain;
+ char *result;
+ int len;
+ char *p;
+
+ if (name == NULL)
+ {
+ __set_errno (EINVAL);
+ return NSS_STATUS_UNAVAIL;
+ }
+
+ if (yp_get_default_domain (&domain))
+ return NSS_STATUS_UNAVAIL;
+
+ retval = yperr2nss (yp_match (domain, "mail.aliases", name, strlen (name),
+ &result, &len));
+ if (retval != NSS_STATUS_SUCCESS)
+ {
+ if (retval == NSS_STATUS_TRYAGAIN)
+ __set_errno (EAGAIN);
+ return retval;
+ }
+
+ if (len + 1 > buflen)
+ {
+ free (result);
+ __set_errno (ERANGE);
+ return NSS_STATUS_TRYAGAIN;
+ }
+
+ p = strncpy (buffer, result, len);
+ buffer[len] = '\0';
+ while (isspace (*p))
+ ++p;
+ free (result);
+
+ alias->alias_local = 0;
+ parse_res = _nss_nis_parse_aliasent (name, p, alias, buffer, buflen);
+ if (parse_res == -1)
+ return NSS_STATUS_TRYAGAIN;
+ else
+ if (parse_res == 0)
+ return NSS_STATUS_NOTFOUND;
+ else
+ return NSS_STATUS_SUCCESS;
+}