Changes and additions migrated from cvs.devel.redhat.com:/cvs/devel/glibc to fedora-branch

6 files changed, 569 insertions, 0 deletions

diff --git a/glibc-compat/nss_db/db-XXX.c b/glibc-compat/nss_db/db-XXX.c
new file mode 100644
index 0000000000..8c05829656
--- /dev/null
+++ b/glibc-compat/nss_db/db-XXX.c
@@ -0,0 +1,257 @@
+/* Common code for DB-based databases in nss_db module.
+   Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   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 <dlfcn.h>
+#include <fcntl.h>
+#include <bits/libc-lock.h>
+#include "nsswitch.h"
+#include "nss_db.h"
+
+/* These symbols are defined by the including source file:
+
+   ENTNAME -- database name of the structure and functions (hostent, pwent).
+   STRUCTURE -- struct name, define only if not ENTNAME (passwd, group).
+   DATABASE -- database file name, ("hosts", "passwd")
+
+   NEED_H_ERRNO - defined iff an arg `int *herrnop' is used.
+*/
+
+#define ENTNAME_r	CONCAT(ENTNAME,_r)
+
+#include <paths.h>
+#define	DBFILE		_PATH_VARDB DATABASE ".db"
+
+#ifdef NEED_H_ERRNO
+#define H_ERRNO_PROTO	, int *herrnop
+#define H_ERRNO_ARG	, herrnop
+#define H_ERRNO_SET(val) (*herrnop = (val))
+#else
+#define H_ERRNO_PROTO
+#define H_ERRNO_ARG
+#define H_ERRNO_SET(val) ((void) 0)
+#endif
+
+/* Locks the static variables in this file.  */
+__libc_lock_define_initialized (static, lock)
+
+/* Maintenance of the shared handle open on the database.  */
+
+static NSS_DB *db;
+static int keep_db;
+static int entidx;
+
+
+/* Open the database.  */
+enum nss_status
+CONCAT(_nss_db_set,ENTNAME) (int stayopen)
+{
+  enum nss_status status;
+
+  __libc_lock_lock (lock);
+
+  status = internal_setent (DBFILE, &db);
+
+  /* Remember STAYOPEN flag.  */
+  if (db != NULL)
+    keep_db |= stayopen;
+  /* Reset the sequential index.  */
+  entidx = 0;
+
+  __libc_lock_unlock (lock);
+
+  return status;
+}
+
+
+/* Close it again.  */
+enum nss_status
+CONCAT(_nss_db_end,ENTNAME) (void)
+{
+  __libc_lock_lock (lock);
+
+  internal_endent (&db);
+
+  /* Reset STAYOPEN flag.  */
+  keep_db = 0;
+
+  __libc_lock_unlock (lock);
+
+  return NSS_STATUS_SUCCESS;
+}
+
+/* Do a database lookup for KEY.  */
+static enum nss_status
+lookup (DBT *key, struct STRUCTURE *result,
+	void *buffer, int buflen H_ERRNO_PROTO)
+{
+  char *p;
+  enum nss_status status;
+  int err;
+  DBT value;
+
+  /* Open the database.  */
+  if (db == NULL)
+    {
+      status = internal_setent (DBFILE, &db);
+      if (status != NSS_STATUS_SUCCESS)
+	{
+	  H_ERRNO_SET (NETDB_INTERNAL);
+	  return status;
+	}
+    }
+
+  /* Succeed iff it matches a value that parses correctly.  */
+  value.flags = 0;
+  err = DL_CALL_FCT (db->get, (db->db, NULL, key, &value, 0));
+  if (err != 0)
+    {
+      if (err == db_notfound)
+	{
+	  H_ERRNO_SET (HOST_NOT_FOUND);
+	  status = NSS_STATUS_NOTFOUND;
+	}
+      else
+	{
+	  H_ERRNO_SET (NETDB_INTERNAL);
+	  status = NSS_STATUS_UNAVAIL;
+	}
+    }
+  else if (buflen < value.size)
+    {
+      /* No room to copy the data to.  */
+      __set_errno (ERANGE);
+      H_ERRNO_SET (NETDB_INTERNAL);
+      status = NSS_STATUS_TRYAGAIN;
+    }
+  else
+    {
+      /* Copy the result to a safe place.  */
+      p = (char *) memcpy (buffer, value.data, value.size);
+
+      /* Skip leading blanks.  */
+      while (isspace (*p))
+	++p;
+
+      err = parse_line (p, result, buffer, buflen);
+
+      if (err == 0)
+	{
+	  /* If the key begins with '0' we are trying to get the next
+	     entry.  We want to ignore unparsable lines in this case.  */
+	  if (((char *) key->data)[0] == '0')
+	    {
+	      /* Super magical return value.  We need to tell our caller
+		 that it should continue looping.  This value cannot
+		 happen in other cases.  */
+	      status = NSS_STATUS_RETURN;
+	    }
+	  else
+	    {
+	      H_ERRNO_SET (HOST_NOT_FOUND);
+	      status = NSS_STATUS_NOTFOUND;
+	    }
+	}
+      else if (err < 0)
+	{
+	  H_ERRNO_SET (NETDB_INTERNAL);
+	  status = NSS_STATUS_TRYAGAIN;
+	}
+      else
+	status = NSS_STATUS_SUCCESS;
+    }
+
+  if (! keep_db)
+    internal_endent (&db);
+
+  return status;
+}
+
+
+/* Macro for defining lookup functions for this DB-based database.
+
+   NAME is the name of the lookup; e.g. `pwnam'.
+
+   KEYPATTERN gives `printf' args to construct a key string;
+   e.g. `(".%s", name)'.
+
+   KEYSIZE gives the allocation size of a buffer to construct it in;
+   e.g. `1 + strlen (name)'.
+
+   PROTO describes the arguments for the lookup key;
+   e.g. `const char *name'.
+
+   BREAK_IF_MATCH is ignored, but used by ../nss_files/files-XXX.c.  */
+
+#define DB_LOOKUP(name, keysize, keypattern, break_if_match, proto...)	      \
+enum nss_status								      \
+_nss_db_get##name##_r (proto,						      \
+		       struct STRUCTURE *result,			      \
+		       char *buffer, size_t buflen H_ERRNO_PROTO)\
+{									      \
+  DBT key;								      \
+  enum nss_status status;						      \
+  const size_t size = (keysize) + 1;					      \
+  key.data = __alloca (size);						      \
+  key.size = KEYPRINTF keypattern;					      \
+  key.flags = 0;							      \
+  __libc_lock_lock (lock);						      \
+  status = lookup (&key, result, buffer, buflen H_ERRNO_ARG);	      	      \
+  __libc_lock_unlock (lock);						      \
+  return status;							      \
+}
+
+#define KEYPRINTF(pattern, args...) snprintf (key.data, size, pattern ,##args)
+
+
+
+
+/* Return the next entry from the database file, doing locking.  */
+enum nss_status
+CONCAT(_nss_db_get,ENTNAME_r) (struct STRUCTURE *result, char *buffer,
+			       size_t buflen H_ERRNO_PROTO)
+{
+  /* Return next entry in host file.  */
+  enum nss_status status;
+  char buf[20];
+  DBT key;
+
+  __libc_lock_lock (lock);
+
+  /* Loop until we find a valid entry or hit EOF.  See above for the
+     special meaning of the status value.  */
+  do
+    {
+      key.size = snprintf (key.data = buf, sizeof buf, "0%u", entidx++);
+      key.flags = 0;
+      status = lookup (&key, result, buffer, buflen H_ERRNO_ARG);
+      if (status == NSS_STATUS_TRYAGAIN
+#ifdef NEED_H_ERRNO
+	  && *herrnop == NETDB_INTERNAL
+#endif
+	  && errno == ERANGE)
+	/* Give the user a chance to get the same entry with a larger
+	   buffer.  */
+	--entidx;
+    }
+  while (status == NSS_STATUS_RETURN);
+
+  __libc_lock_unlock (lock);
+
+  return status;
+}
diff --git a/glibc-compat/nss_db/db-alias.c b/glibc-compat/nss_db/db-alias.c
new file mode 100644
index 0000000000..b9b9489989
--- /dev/null
+++ b/glibc-compat/nss_db/db-alias.c
@@ -0,0 +1,208 @@
+/* Mail alias file parser in nss_db module.
+   Copyright (C) 1996, 1997, 1998, 1999, 2000 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 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 <glibc-compat/include/aliases.h>
+#include <alloca.h>
+#include <ctype.h>
+#include <dlfcn.h>
+#include <errno.h>
+#include <bits/libc-lock.h>
+#include <paths.h>
+#include <string.h>
+
+#include "nsswitch.h"
+#include "nss_db.h"
+
+/* Locks the static variables in this file.  */
+__libc_lock_define_initialized (static, lock)
+
+/* Maintenance of the shared handle open on the database.  */
+
+static NSS_DB *db;
+static int keep_db;
+static unsigned int entidx;	/* Index for `getaliasent_r'. */
+
+
+/* Open database.  */
+enum nss_status
+_nss_db_setaliasent (int stayopen)
+{
+  enum nss_status status;
+
+  __libc_lock_lock (lock);
+
+  status = internal_setent (_PATH_VARDB "aliases.db", &db);
+
+  /* Remember STAYOPEN flag.  */
+  if (db != NULL)
+    keep_db |= stayopen;
+
+  /* Reset the sequential index.  */
+  entidx = 0;
+
+  __libc_lock_unlock (lock);
+
+  return status;
+}
+
+
+/* Close it again.  */
+enum nss_status
+_nss_db_endaliasent (void)
+{
+  __libc_lock_lock (lock);
+
+  internal_endent (&db);
+
+  /* Reset STAYOPEN flag.  */
+  keep_db = 0;
+
+  __libc_lock_unlock (lock);
+
+  return NSS_STATUS_SUCCESS;
+}
+
+/* We provide the parse function here.  The parser in libnss_files
+   cannot be used.  The generation of the db file already resolved all
+   :include: statements so we simply have to parse the list and store
+   the result.  */
+static enum nss_status
+lookup (DBT *key, struct aliasent *result, char *buffer,
+	size_t buflen)
+{
+  enum nss_status status;
+  DBT value;
+
+  /* Open the database.  */
+  if (db == NULL)
+    {
+      status = internal_setent (_PATH_VARDB "aliases.db", &db);
+      if (status != NSS_STATUS_SUCCESS)
+	return status;
+    }
+
+  value.flags = 0;
+  if (DL_CALL_FCT (db->get, (db->db, NULL, key, &value, 0)) == 0)
+    {
+      const char *src = value.data;
+      char *cp;
+      size_t cnt;
+
+      result->alias_members_len = 0;
+
+      /* We now have to fill the BUFFER with all the information. */
+      if (buflen < key->size + 1)
+	{
+	no_more_room:
+	  __set_errno (ERANGE);
+	  return NSS_STATUS_TRYAGAIN;
+	}
+
+      buffer = stpncpy (buffer, key->data, key->size) + 1;
+      buflen -= key->size + 1;
+
+      while (*src != '\0')
+	{
+	  const char *end, *upto;
+	  while (isspace (*src))
+	    ++src;
+
+	  end = strchr (src, ',');
+	  if (end == NULL)
+	    end = strchr (src, '\0');
+	  for (upto = end; upto > src && isspace (upto[-1]); --upto);
+
+	  if (upto != src)
+	    {
+	      if ((upto - src) + __alignof__ (char *) > buflen)
+		goto no_more_room;
+	      buffer = stpncpy (buffer, src, upto - src) + 1;
+	      buflen -= (upto - src) + __alignof (char *);
+	      ++result->alias_members_len;
+	    }
+	  src = end + (*end != '\0');
+	}
+
+      /* Now prepare the return.  Provide string pointers for the
+	 currently selected aliases.  */
+
+      /* Adjust the pointer so it is aligned for storing pointers.  */
+      buffer += __alignof__ (char *) - 1;
+      buffer -= ((buffer - (char *) 0) % __alignof__ (char *));
+      result->alias_members = (char **) buffer;
+
+      /* 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);
+    }
+  else
+    status = NSS_STATUS_NOTFOUND;
+
+  if (! keep_db)
+    internal_endent (&db);
+
+  return status;
+}
+
+enum nss_status
+_nss_db_getaliasent_r (struct aliasent *result, char *buffer, size_t buflen)
+{
+  /* Return next entry in alias file.  */
+  enum nss_status status;
+  char buf[20];
+  DBT key;
+
+  __libc_lock_lock (lock);
+  key.size = snprintf (key.data = buf, sizeof buf, "0%u", entidx++);
+  key.flags = 0;
+  status = lookup (&key, result, buffer, buflen);
+  __libc_lock_unlock (lock);
+
+  return status;
+}
+
+
+enum nss_status
+_nss_db_getaliasbyname_r (const char *name, struct aliasent *result,
+			  char *buffer, size_t buflen)
+{
+  DBT key;
+  enum nss_status status;
+
+  key.size = 1 + strlen (name);
+
+  key.data = __alloca (key.size);
+  ((char *) key.data)[0] = '.';
+  memcpy (&((char *) key.data)[1], name, key.size - 1);
+  key.flags = 0;
+
+  __libc_lock_lock (lock);
+  status = lookup (&key, result, buffer, buflen);
+  __libc_lock_unlock (lock);
+
+  return status;
+}
diff --git a/glibc-compat/nss_db/db-netgrp.c b/glibc-compat/nss_db/db-netgrp.c
new file mode 100644
index 0000000000..73309077e1
--- /dev/null
+++ b/glibc-compat/nss_db/db-netgrp.c
@@ -0,0 +1,101 @@
+/* Netgroup file parser in nss_db modules.
+   Copyright (C) 1996, 1997, 1999, 2000 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 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 <dlfcn.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <netgroup.h>
+#include <string.h>
+#include <bits/libc-lock.h>
+#include <paths.h>
+
+#include "nsswitch.h"
+#include "nss_db.h"
+
+
+#define DBFILE		_PATH_VARDB "netgroup.db"
+
+
+/* Locks the static variables in this file.  */
+__libc_lock_define_initialized (static, lock)
+
+/* Maintenance of the shared handle open on the database.  */
+static NSS_DB *db;
+static char *entry;
+static char *cursor;
+
+enum nss_status
+_nss_db_setnetgrent (const char *group)
+{
+  enum nss_status status;
+
+  __libc_lock_lock (lock);
+
+  status = internal_setent (DBFILE, &db);
+
+  if (status == NSS_STATUS_SUCCESS)
+    {
+      DBT key = { data: (void *) group, size: strlen (group), flags: 0 };
+      DBT value;
+
+      value.flags = 0;
+      if (DL_CALL_FCT (db->get, (db->db, NULL, &key, &value, 0)) != 0)
+	status = NSS_STATUS_NOTFOUND;
+      else
+	cursor = entry = value.data;
+    }
+
+  __libc_lock_unlock (lock);
+
+  return status;
+
+}
+
+
+enum nss_status
+_nss_db_endnetgrent (void)
+{
+  __libc_lock_lock (lock);
+
+  internal_endent (&db);
+
+  __libc_lock_unlock (lock);
+
+  return NSS_STATUS_SUCCESS;
+}
+
+
+extern enum nss_status _nss_netgroup_parseline (char **cursor,
+						struct __netgrent *result,
+						char *buffer, int buflen);
+
+enum nss_status
+_nss_db_getnetgrent_r (struct __netgrent *result, char *buffer, size_t buflen)
+{
+  int status;
+
+  __libc_lock_lock (lock);
+
+  status = _nss_netgroup_parseline (&cursor, result, buffer, buflen);
+
+  __libc_lock_unlock (lock);
+  
+  return status;
+}
diff --git a/glibc-compat/nss_db/db-open.c b/glibc-compat/nss_db/db-open.c
new file mode 100644
index 0000000000..99ff3030f0
--- /dev/null
+++ b/glibc-compat/nss_db/db-open.c
@@ -0,0 +1 @@
+#include <nss/nss_db/db-open.c>
diff --git a/glibc-compat/nss_db/dummy-db.h b/glibc-compat/nss_db/dummy-db.h
new file mode 100644
index 0000000000..aed84621c1
--- /dev/null
+++ b/glibc-compat/nss_db/dummy-db.h
@@ -0,0 +1 @@
+#include <nss/nss_db/dummy-db.h>
diff --git a/glibc-compat/nss_db/nss_db.h b/glibc-compat/nss_db/nss_db.h
new file mode 100644
index 0000000000..0bd98b5866
--- /dev/null
+++ b/glibc-compat/nss_db/nss_db.h
@@ -0,0 +1 @@
+#include <nss/nss_db/nss_db.h>