glibc/sysdeps/posix/getcwd.c
Ulrich Drepper 04be94a87d Update.
1997-12-01 17:27  Ulrich Drepper  <drepper@cygnus.com>

	* Makefile (subdirs): Add iconvdata and localedata.

	* iconv/gconv.h: Define UNKNOWN_10646_CHAR as error value.

	* iconv/gconv_conf.c (read_conf_file): Little optimization.

	* iconvdata/8bit-gap.c: New file.
	* iconvdata/8bit-generic.c: Renamed from ...
	* iconvdata/iso8859-generic.c: ...this.
	* iconvdata/configure: Removed.
	* iconvdata/Makefile: Add new modules and better rules.
	* iconvdata/iso6937.c: Minor bug fixes.
	* iconvdata/iso8859-1.c: Likewise.
	* iconvdata/t61.c: Likewise.
	* iconvdata/iso8859-2.c: Change to use 8bit-generic.c.
	Minor bug fixes.
	* iconvdata/iso8859-3.c: Likewise.
	* iconvdata/iso8859-4.c: Likewise.
	* iconvdata/iso8859-5.c: Likewise.
	* iconvdata/iso8859-6.c: Likewise.
	* iconvdata/iso8859-7.c: Likewise.
	* iconvdata/iso8859-8.c: Likewise.
	* iconvdata/iso8859-9.c: Likewise.
	* iconvdata/iso8859-10.c: Likewise.
	* iconvdata/ebcdic-at-de-a.c: New file.
	* iconvdata/ebcdic-at-de.c: New file.
	* iconvdata/ebcdic-ca-fr.c: New file.
	* iconvdata/hp-roman8.c: New file.
	* iconvdata/koi-8.c: New file.
	* iconvdata/koi8-r.c: New file.
	* iconvdata/koi8-h.c: New file.
	* iconvdata/latin-greek-1.c: New file.
	* iconvdata/latin-greek-1.h: New file.
	* iconvdata/latin-greek.c: New file.
	* iconvdata/latin-greek.h: New file.
	* iconvdata/jis0201.c: New file.
	* iconvdata/jis0201.h: New file.
	* iconvdata/jis0208.c: New file.
	* iconvdata/jis0208.h: New file.
	* iconvdata/jis0212.c: New file.
	* iconvdata/jis0212.h: New file.
	* iconvdata/sjis.c: New file.
	* iconvdata/gap.pl: New file.  Script to generate table header.
	* iconvdata/gaptab.pl: New file.
	* iconvdata/gconv-modules: Add info about new modules.

	* locale/programs/charmap.c: Also examine alias names given in charmap
	files.

	* localedata/*: Add to here from add-on.  We need the information
	to generate tables for iconv.

	Update from db-2.3.14.
	* db2/Makefile: Updated.
	* db2/config.h: Likewise.
	* db2/db.h: Likewise.
	* db2/db_int.h: Likewise.
	* db2/btree/bt_cursor.c: Likewise.
	* db2/btree/bt_delete.c: Likewise.
	* db2/btree/bt_put.c: Likewise.
	* db2/btree/bt_search.c: Likewise.
	* db2/btree/bt_split.c: Likewise.
	* db2/btree/btree_auto.c: Likewise.
	* db2/common/db_appinit.c: Likewise.
	* db2/common/db_apprec.c: Likewise.
	* db2/common/db_err.c: Likewise.
	* db2/common/db_region.c: Likewise.
	* db2/db/db_auto.c: Likewise.
	* db2/db/db_dispatch.c: Likewise.
	* db2/db/db_ret.c: Likewise.
	* db2/dbm/dbm.c: Likewise.
	* db2/hash/hash_auto.c: Likewise.
	* db2/include/btree_ext.h: Likewise.
	* db2/include/common_ext.h: Likewise.
	* db2/include/db.h.src: Likewise.
	* db2/include/db_cxx.h: Likewise.
	* db2/include/db_ext.h: Likewise.
	* db2/include/db_int.h.src: Likewise.
	* db2/include/lock.h: Likewise.
	* db2/include/log.h: Likewise.
	* db2/include/mp.h: Likewise.
	* db2/include/mp_ext.h: Likewise.
	* db2/include/os_ext.h: Likewise.
	* db2/include/os_func.h: Likewise.
	* db2/lock/lock.c: Likewise.
	* db2/lock/lock_deadlock.c: Likewise.
	* db2/log/log.c: Likewise.
	* db2/log/log_archive.c: Likewise.
	* db2/log/log_auto.c: Likewise.
	* db2/log/log_get.c: Likewise.
	* db2/log/log_put.c: Likewise.
	* db2/mp/mp_bh.c: Likewise.
	* db2/mp/mp_fget.c: Likewise.
	* db2/mp/mp_fopen.c: Likewise.
	* db2/mp/mp_fput.c: Likewise.
	* db2/mp/mp_fset.c: Likewise.
	* db2/mp/mp_open.c: Likewise.
	* db2/mp/mp_pr.c: Likewise.
	* db2/mp/mp_region.c: Likewise.
	* db2/mp/mp_sync.c: Likewise.
	* db2/mutex/README: Likewise.
	* db2/mutex/mutex.c: Likewise.
	* db2/os/os_open.c: Likewise.
	* db2/os/os_func.c: Removed.
	* db2/os/os_config.c: New file.
	* db2/os/os_spin.c: New file.
	* db2/txn/txn.c: Likewise.
	* db2/txn/txn_auto.c: Likewise.

1997-11-30 06:01  Ulrich Drepper  <drepper@cygnus.com>

	* posix/sys/wait.h (__WAIT_INT): Don't use complex version with
	__typeof for C++ since this fails for class members.
	Reported by Neal Becker <neal@ctd.comsat.com>.

1997-11-28 11:21  Zack Weinberg  <zack@rabi.phys.columbia.edu>

	* configure.in: Check for a working makeinfo (3.11 or better).
	* config.make.in: Add MAKEINFO to be substituted.
	* manual/Makefile: Don't update info if makeinfo is too old.

1997-11-30 05:21  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/alpha/setjmp.S: Define _ASM and _SETJMP_H to get definitions.
	* sysdeps/alpha/__longjmp.S: Likewise.
	* sysdeps/unix/sysv/linux/alpha/kernel_termios.h: Include <termios.h>
	not <bits/termios.h>.

	* sysdeps/unix/sysv/linux/alpha/syscalls.list: Define syscall as
	__llseek and make llseek and lseek64 weak aliases.
	* sysdeps/unix/sysv/linux/sparc/sparc64/syscalls.list: Likewise.
	Patches by a sun <asun@zoology.washington.edu>.

1997-11-29 19:19  Zack Weinberg  <zack@rabi.phys.columbia.edu>

	* misc/sys/syslog.h: Delete KERNEL preprocessor conditional.
	* sysdeps/unix/sysv/linux/powerpc/bits/termios.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/bits/termios.h: Likewise.
	* misc/sys/syslog.h: Clean up BSD header.

1997-11-29  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* sysdeps/unix/sysv/linux/bits/in.h: Add changes from Linux 2.1.67.

	* sysdeps/libm-ieee754/s_ctan.c (__ctan): Raise invalid exception
	for ctan(+-inf,x).
	* sysdeps/libm-ieee754/s_ctanl.c (__ctanl): Likewise.
	* sysdeps/libm-ieee754/s_ctanf.c (__ctanf): Likewise.

	* math/libm-test.c (csqrt_test): Add tests for cabs, carg, ctan,
	csqrt (-1), ctanh(i*pi/4).

1997-11-26  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/generic/bits/confname.h: Fix comma in enumerator.

1997-11-28 13:28  Philip Blundell  <Philip.Blundell@pobox.com>

	* sysdeps/unix/sysv/linux/net/if_arp.h: Add more ARPHRD_ constants.

1997-11-26  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* wcsmbs/wcrtomb.c (__wcrtomb): Remove unused variable fake.

1997-11-26 21:28  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/posix/getcwd.c (GETCWD_STORYGE_CLASS): Remove definition
	and use.  Define GETCWD_RETURN_TYPE instead and use it.
	* sysdeps/unix/sysv/linux/getcwd.c: Define GETCWD_RETURN_TYPE instead
	of GETCWD_STORYGE_CLASS and put the return type and the
	`internal_function' in the right order for gcc 2.7.2.

1997-11-26  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* sysdeps/unix/sysv/linux/sys/module.h: Remove file.  It's
	incompatible with Linux 2.1.x.  Packages using modules
	(e.g. modutils) should/do provide their own version.  Suggested by
	Richard Henderson.

	* sysdeps/unix/sysv/linux/Dist: Remove sys/module.h.

	* sysdeps/unix/sysv/linux/Makefile (sysdep_headers)
	[$(subdir)=socket]: Remove sys/module.h.

	* libio/stdio.h: Correct comment of sys_nerr/sys_errlist.
1997-12-01 17:16:22 +00:00

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/* Copyright (C) 1991, 92, 93, 94, 95, 96, 97 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. */
/* Wants:
AC_STDC_HEADERS
AC_DIR_HEADER
AC_UNISTD_H
AC_MEMORY_H
AC_CONST
AC_ALLOCA
*/
/* AIX requires this to be the first thing in the file. */
#if defined _AIX && !defined __GNUC__
#pragma alloca
#endif
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#ifdef STDC_HEADERS
# include <stddef.h>
#endif
#if !defined __GNU_LIBRARY__ && !defined STDC_HEADERS
extern int errno;
#endif
#ifndef __set_errno
# define __set_errno(val) errno = (val)
#endif
#ifndef NULL
# define NULL 0
#endif
#if defined USGr3 && !defined DIRENT
# define DIRENT
#endif /* USGr3 */
#if defined Xenix && !defined SYSNDIR
# define SYSNDIR
#endif /* Xenix */
#if defined POSIX || defined DIRENT || defined __GNU_LIBRARY__
# include <dirent.h>
# ifndef __GNU_LIBRARY__
# define D_NAMLEN(d) strlen((d)->d_name)
# else
# define HAVE_D_NAMLEN
# define D_NAMLEN(d) ((d)->d_namlen)
# endif
#else /* not POSIX or DIRENT */
# define dirent direct
# define D_NAMLEN(d) ((d)->d_namlen)
# define HAVE_D_NAMLEN
# if defined USG && !defined sgi
# if defined SYSNDIR
# include <sys/ndir.h>
# else /* Not SYSNDIR */
# include "ndir.h"
# endif /* SYSNDIR */
# else /* not USG */
# include <sys/dir.h>
# endif /* USG */
#endif /* POSIX or DIRENT or __GNU_LIBRARY__ */
#if defined HAVE_UNISTD_H || defined __GNU_LIBRARY__
# include <unistd.h>
#endif
#if defined STDC_HEADERS || defined __GNU_LIBRARY__ || defined POSIX
# include <stdlib.h>
# include <string.h>
# define ANSI_STRING
#else /* No standard headers. */
# ifdef USG
# include <string.h>
# ifdef NEED_MEMORY_H
# include <memory.h>
# endif
# define ANSI_STRING
# else /* Not USG. */
# ifdef NeXT
# include <string.h>
# else /* Not NeXT. */
# include <strings.h>
# ifndef bcmp
extern int bcmp ();
# endif
# ifndef bzero
extern void bzero ();
# endif
# ifndef bcopy
extern void bcopy ();
# endif
# endif /* NeXT. */
# endif /* USG. */
extern char *malloc (), *realloc ();
extern void free ();
#endif /* Standard headers. */
#ifndef ANSI_STRING
# define memcpy(d, s, n) bcopy((s), (d), (n))
# define memmove memcpy
#endif /* Not ANSI_STRING. */
#ifdef _LIBC
# define mempcpy __mempcpy
# define HAVE_MEMPCPY 1
#endif
#if !defined __alloca && !defined __GNU_LIBRARY__
# ifdef __GNUC__
# undef alloca
# define alloca(n) __builtin_alloca (n)
# else /* Not GCC. */
# if defined sparc || defined HAVE_ALLOCA_H
# include <alloca.h>
# else /* Not sparc or HAVE_ALLOCA_H. */
# ifndef _AIX
extern char *alloca ();
# endif /* Not _AIX. */
# endif /* sparc or HAVE_ALLOCA_H. */
# endif /* GCC. */
# define __alloca alloca
#endif
#if defined HAVE_LIMITS_H || defined STDC_HEADERS || defined __GNU_LIBRARY__
# include <limits.h>
#else
# include <sys/param.h>
#endif
#ifndef PATH_MAX
# ifdef MAXPATHLEN
# define PATH_MAX MAXPATHLEN
# else
# define PATH_MAX 1024
# endif
#endif
#if !defined STDC_HEADERS && !defined __GNU_LIBRARY__
# undef size_t
# define size_t unsigned int
#endif
#if !__STDC__ && !defined const
# define const
#endif
#ifndef __GNU_LIBRARY__
# define __lstat stat
#endif
#ifndef _LIBC
# define __getcwd getcwd
#endif
#ifndef GETCWD_RETURN_TYPE
# define GETCWD_RETURN_TYPE char *
#endif
/* Get the pathname of the current working directory, and put it in SIZE
bytes of BUF. Returns NULL if the directory couldn't be determined or
SIZE was too small. If successful, returns BUF. In GNU, if BUF is
NULL, an array is allocated with `malloc'; the array is SIZE bytes long,
unless SIZE <= 0, in which case it is as big as necessary. */
GETCWD_RETURN_TYPE
__getcwd (buf, size)
char *buf;
size_t size;
{
static const char dots[]
= "../../../../../../../../../../../../../../../../../../../../../../../\
../../../../../../../../../../../../../../../../../../../../../../../../../../\
../../../../../../../../../../../../../../../../../../../../../../../../../..";
const char *dotp, *dotlist;
size_t dotsize;
dev_t rootdev, thisdev;
ino_t rootino, thisino;
char *path;
register char *pathp;
struct stat st;
int prev_errno = errno;
if (size == 0)
{
if (buf != NULL)
{
__set_errno (EINVAL);
return NULL;
}
size = PATH_MAX + 1;
}
if (buf != NULL)
path = buf;
else
{
path = malloc (size);
if (path == NULL)
return NULL;
}
pathp = path + size;
*--pathp = '\0';
if (__lstat (".", &st) < 0)
return NULL;
thisdev = st.st_dev;
thisino = st.st_ino;
if (__lstat ("/", &st) < 0)
return NULL;
rootdev = st.st_dev;
rootino = st.st_ino;
dotsize = sizeof (dots) - 1;
dotp = &dots[sizeof (dots)];
dotlist = dots;
while (!(thisdev == rootdev && thisino == rootino))
{
register DIR *dirstream;
struct dirent *d;
dev_t dotdev;
ino_t dotino;
char mount_point;
/* Look at the parent directory. */
if (dotp == dotlist)
{
/* My, what a deep directory tree you have, Grandma. */
char *new;
if (dotlist == dots)
{
new = malloc (dotsize * 2 + 1);
if (new == NULL)
return NULL;
#ifdef HAVE_MEMPCPY
dotp = mempcpy (new, dots, dotsize);
#else
memcpy (new, dots, dotsize);
dotp = &new[dotsize];
#endif
}
else
{
new = realloc ((__ptr_t) dotlist, dotsize * 2 + 1);
if (new == NULL)
goto lose;
dotp = &new[dotsize];
}
#ifdef HAVE_MEMPCPY
*((char *) mempcpy ((char *) dotp, new, dotsize)) = '\0';
dotsize *= 2;
#else
memcpy ((char *) dotp, new, dotsize);
dotsize *= 2;
new[dotsize] = '\0';
#endif
dotlist = new;
}
dotp -= 3;
/* Figure out if this directory is a mount point. */
if (__lstat (dotp, &st) < 0)
goto lose;
dotdev = st.st_dev;
dotino = st.st_ino;
mount_point = dotdev != thisdev;
/* Search for the last directory. */
dirstream = __opendir (dotp);
if (dirstream == NULL)
goto lose;
/* Clear errno to distinguish EOF from error if readdir returns
NULL. */
__set_errno (0);
while ((d = __readdir (dirstream)) != NULL)
{
if (d->d_name[0] == '.' &&
(d->d_name[1] == '\0' ||
(d->d_name[1] == '.' && d->d_name[2] == '\0')))
continue;
if (mount_point || (ino_t) d->d_ino == thisino)
{
char name[dotlist + dotsize - dotp + 1 + _D_ALLOC_NAMLEN (d)];
#ifdef HAVE_MEMPCPY
char *tmp = mempcpy (name, dotp, dotlist + dotsize - dotp);
*tmp++ = '/';
strcpy (tmp, d->d_name);
#else
memcpy (name, dotp, dotlist + dotsize - dotp);
name[dotlist + dotsize - dotp] = '/';
strcpy (&name[dotlist + dotsize - dotp + 1], d->d_name);
#endif
if (__lstat (name, &st) < 0)
{
int save = errno;
(void) __closedir (dirstream);
__set_errno (save);
goto lose;
}
if (st.st_dev == thisdev && st.st_ino == thisino)
break;
}
}
if (d == NULL)
{
int save = errno;
(void) __closedir (dirstream);
if (save == 0)
/* EOF on dirstream, which means that the current directory
has been removed. */
save = ENOENT;
__set_errno (save);
goto lose;
}
else
{
size_t namlen = _D_EXACT_NAMLEN (d);
if ((size_t) (pathp - path) <= namlen)
{
if (buf != NULL)
{
(void) __closedir (dirstream);
__set_errno (ERANGE);
goto lose;
}
else
{
size *= 2;
buf = realloc (path, size);
if (buf == NULL)
{
(void) __closedir (dirstream);
free (path);
__set_errno (ENOMEM);/* closedir might have changed it.*/
goto lose;
}
pathp = &buf[pathp - path + size / 2];
path = buf;
/* Move current contents up to the end of the buffer.
This is guaranteed to be non-overlapping. */
memcpy (pathp, pathp - size / 2, path + size - pathp);
}
}
pathp -= namlen;
(void) memcpy (pathp, d->d_name, namlen);
*--pathp = '/';
(void) __closedir (dirstream);
}
thisdev = dotdev;
thisino = dotino;
}
if (pathp == &path[size - 1])
*--pathp = '/';
if (dotlist != dots)
free ((__ptr_t) dotlist);
memmove (path, pathp, path + size - pathp);
/* Restore errno on successful return. */
__set_errno (prev_errno);
return path;
lose:
if (dotlist != dots)
free ((__ptr_t) dotlist);
return NULL;
}
#if defined _LIBC && !defined __getcwd
weak_alias (__getcwd, getcwd)
#endif