glibc/nss/nss_files/files-alias.c
Ulrich Drepper 740152054e Update.
1998-01-22 00:55  Ulrich Drepper  <drepper@happy.cygnus.com>

	* libc.map: Add __libc_uid, __libc_pid, __syscall_rt_sigqueueinfo,
	__pread64, __pwrite64, and __getpid.

	* libc/rt/aio_misc.c: Use pread and pwrite instead of __ protected
	versions.

1998-01-06  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/unix/sysv/linux/alpha/syscalls.list: Define the
	cancelable socket functions as __libc_xxx with __xxx as weak
	alias.
	* sysdeps/unix/sysv/linux/mips/syscalls.list: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/syscalls.list: Likewise.

	* sysdeps/unix/sysv/linux/m68k/socket.S: Allow __socket to be
	redefined.
	* sysdeps/unix/sysv/linux/i386/socket.S: Likewise.
	* sysdeps/unix/sysv/linux/arm/socket.S: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/socket.S: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/socket.S: Likewise.

	* sysdeps/unix/sysv/linux/accept.S: Make __libc_xxx the main name
	and __xxx a weak alias.
	* sysdeps/unix/sysv/linux/connect.S: Likewise.
	* sysdeps/unix/sysv/linux/recv.S: Likewise.
	* sysdeps/unix/sysv/linux/recvfrom.S: Likewise.
	* sysdeps/unix/sysv/linux/recvmsg.S: Likewise.
	* sysdeps/unix/sysv/linux/send.S: Likewise.
	* sysdeps/unix/sysv/linux/sendmsg.S: Likewise.
	* sysdeps/unix/sysv/linux/sendto.S: Likewise.

1998-01-21  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* locale/langinfo.h: Add defines.

	* dirent/dirent.h: Add defines for DT_*, check also for
	_DIRENT_HAVE_D_TYPE.
	Suggested by Roland McGrath.

1998-01-16  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* sysdeps/unix/sysv/linux/netinet/ip_fw.h:
	Update from Linux 2.1.73+79.

	* README.template: Update information about possible
	configurations.

	* manual/mbyte.texi (Wide String Conversion): Fix declaration of
	wcstombs. Pointed out by Jochen Voss <voss@mathematik.uni-kl.de>.
	[PR libc/417].

	* manual/time.texi (Priority): Correct description of
	PRIO_MAX. Pointed out by Jochen Voss <voss@mathematik.uni-kl.de>.
	[PR libc/416].

11998-01-21 21:34  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/alpha/fpu/bits/mathdef.h: Add definition of FP_ILOGB0 and
	FP_ILOGNAN.   Patch by a sun <asun@zoology.washington.edu>.

1998-01-21 17:53  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/generic/_strerror.c: Handle BUFLEN == 0.  Reported by
	Andreas Jaeger.

1998-01-20 18:13  Ulrich Drepper  <drepper@cygnus.com>

	* locale/programs/ld-collate.c: Little optimizations.

	* stdio-common/xbug.c: Unset LD_LIBRRARY_PATH variable.

	* string/Makefile (tests): Add tst-inlcall.
	* string/tst-inlcall.c: New file.

	* string/strsignal.c: Add support for real-time signals.

	* sysdeps/generic/_strerror.c: Fix Handling of unknown error in
	presense of small buffer.

	* sysdeps/i386/bits/string.h: Define _HAVE_STRING_ARCH_* macros.

	* sysdeps/i386/i486/bits/string.h: Correct strrchr implementation
	for i686.

	* sysdeps/unix/sysv/linux/siglist.c: Change length of arrays to
	_NSIG + 1.
	
1998-01-02 15:10  Matthias Urlichs   <urlichs@noris.de>

	* Rules: Add explicit rule for dummy.o; at least one library needs
	  it and it isn't autogenerated by the default rules.
	
1997-12-31  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* math/libm-test.c: Tweak epsilons.

1997-12-31  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* math/test-fenv.c (feenv_nomask_test): Avoid dumping core in the
	child.
	(feenv_mask_test): Likewise.

1998-01-01  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* Makeconfig: Don't export CPPFLAGS.

1998-01-01  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sunrpc/rpc_main.c (parseargs): Use perror to print error
	message.

1998-01-15  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>
 
	* nss/nss_db/db-alias.c (_nss_db_getaliasent_r): Don't include
	terminating null in key size.

1998-01-13  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* nss/nss_files/files-service.c: Fix allocation size to include
	length of PROTO.

	* nss/nss_db/db-XXX.c (lookup): Always set errno and h_errno if
	applicable.  Fix return value and error checking.
	(CONCAT(_nss_db_get,ENTNAME_r)): Loop around to skip over
	unparsable lines.
	(DB_LOOKUP): Allocate space for terminating null byte.

	* nss/db-Makefile ($(VAR_DB)/passwd.db): Don't handle duplicate
	uids specially.

	* db2/makedb.c (process_input): Continue processing if a duplicate
	key is encountered.

1998-01-19 15:20  Ulrich Drepper  <drepper@cygnus.com>

	* time/tzfile.h: Updated from tzcode1998b.
	* time/zdump.c: Likewise.
	* time/zic.c: Likewise.
	* time/africa: Update from tzdata1998b.
	* time/antarctica: Likewise.
	* time/asia: Likewise.
	* time/australasia: Likewise.
	* time/etcetera: Likewise.
	* time/europe: Likewise.
	* time/leapseconds: Likewise.
	* time/northamerica: Likewise.
	* time/southamerica: Likewise.
	
1998-01-12  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* nss/nss_files/files-alias.c (get_next_alias): Do mail alias
	lookups ignoring case.
	* nss/nss_files/files-network.c: Do network lookups ignoring
	case.
	* nss/nss_files/files-hosts.c: Do hostname lookups ignoring
	case.
	* nss/nss_files/files-parse.c (LOOKUP_NAME_CASE): New macro for
	case insensitive comparing.
	Patches by Cristian Gafton <gafton@redhat.com>.

1998-01-09  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* sysdeps/unix/sysv/linux/net/if.h: Add IFF_*defines.  Suggested
	by Roland McGrath. [PR libc/395]

1998-01-08  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

 	* manual/arith.texi (Parsing of Integers): Correct description of
 	strtoul. Pointed out by Scott Snyder <snyder@fnald0.fnal.gov>.
 	[PR libc/396]

1997-12-30 14:14  Matthias Urlichs  <urlichs@noris.de>

        * misc/lsearch.c (lsearch): Return a pointer to the new element
        if one was "allocated".

1997-12-26  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

        * string/strsignal.c: NSIG is not a valid index into
        _sys_siglist.  Don't zap the last character of the "Unknown
        signal" message.

1998-01-19 15:08  Ulrich Drepper  <drepper@cygnus.com>
	
	* locale/programs/charmap.c (parse_charmap): Correct parsing of
	ellipsis expressions.

	* locale/programs/charset.c (insert_char): Correctly insert value
	of eliipsis expression.
1998-01-21 17:04:36 +00:00

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/* Mail alias file parser in nss_files module.
Copyright (C) 1996, 1997, 1998 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 <aliases.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <bits/libc-lock.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "nsswitch.h"
/* Locks the static variables in this file. */
__libc_lock_define_initialized (static, lock)
/* Maintenance of the shared stream open on the database file. */
static FILE *stream;
static fpos_t position;
static enum { none, getent, getby } last_use;
static enum nss_status
internal_setent (void)
{
enum nss_status status = NSS_STATUS_SUCCESS;
if (stream == NULL)
{
stream = fopen ("/etc/aliases", "r");
if (stream == NULL)
status = errno == EAGAIN ? NSS_STATUS_TRYAGAIN : NSS_STATUS_UNAVAIL;
else
{
/* We have to make sure the file is `closed on exec'. */
int result, flags;
result = flags = fcntl (fileno (stream), F_GETFD, 0);
if (result >= 0)
{
flags |= FD_CLOEXEC;
result = fcntl (fileno (stream), F_SETFD, flags);
}
if (result < 0)
{
/* Something went wrong. Close the stream and return a
failure. */
fclose (stream);
stream = NULL;
status = 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 ();
if (status == NSS_STATUS_SUCCESS && fgetpos (stream, &position) < 0)
{
fclose (stream);
stream = NULL;
status = NSS_STATUS_UNAVAIL;
}
last_use = getent;
__libc_lock_unlock (lock);
return status;
}
/* Close the database file. */
static void
internal_endent (void)
{
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 ();
__libc_lock_unlock (lock);
return NSS_STATUS_SUCCESS;
}
/* Parsing the database file into `struct aliasent' data structures. */
static enum nss_status
get_next_alias (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;
/* Read the first line. It must contain the alias name and
possibly some alias names. */
first_unused[room_left - 1] = '\0';
line = fgets (first_unused, room_left, stream);
if (line == NULL)
/* Nothing to read. */
break;
else if (first_unused[room_left - 1] != '\0')
{
/* 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], "r");
/* If the file does not exist we simply ignore
the statement. */
if (listfile != NULL
&& (old_line = strdup (line)) != NULL)
{
while (! feof (listfile))
{
first_unused[room_left - 1] = '\0';
line = fgets (first_unused, room_left, listfile);
if (line == NULL)
break;
if (first_unused[room_left - 1] != '\0')
{
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);
if (old_line != NULL)
free (old_line);
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 (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] = '\0';
line = fgets (first_unused, room_left, stream);
if (first_unused[room_left - 1] != '\0')
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 ();
if (status == NSS_STATUS_SUCCESS)
{
/* If the last use was not by the getent function we need the
position the stream. */
if (last_use != getent)
if (fsetpos (stream, &position) < 0)
status = NSS_STATUS_UNAVAIL;
else
last_use = getent;
if (status == NSS_STATUS_SUCCESS)
{
result->alias_local = 1;
/* Read lines until we get a definite result. */
do
status = get_next_alias (NULL, result, buffer, buflen, errnop);
while (status == NSS_STATUS_RETURN);
/* If we successfully read an entry remember this position. */
if (status == NSS_STATUS_SUCCESS)
fgetpos (stream, &position);
else
last_use = none;
}
}
__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;
if (name == NULL)
{
__set_errno (EINVAL);
return NSS_STATUS_UNAVAIL;
}
__libc_lock_lock (lock);
/* Open the stream or rest it. */
status = internal_setent ();
last_use = getby;
if (status == NSS_STATUS_SUCCESS)
{
result->alias_local = 1;
/* Read lines until we get a definite result. */
do
status = get_next_alias (name, result, buffer, buflen, errnop);
while (status == NSS_STATUS_RETURN);
}
internal_endent ();
__libc_lock_unlock (lock);
return status;
}