gnulib: lib/getcwd.c annotate

annotate lib/getcwd.c @ 17335:840c32a600aa

getcwd: support coreutils better Like strtod, getcwd incorrectly referred to HAVE_RAW_DECL_GETCWD, but this might not be correct in coreutils, which disables the raw decl checks. Problem reported by Nagendra in <http://bugs.gnu.org/10305#192>. * lib/getcwd.c (__getcwd): Do not depend on HAVE_RAW_DECL_GETCWD. * m4/getcwd-path-max.m4 (gl_FUNC_GETCWD_PATH_MAX): Test the getcwd function, not any macro, since getcwd.c wants the function. * m4/getcwd.m4 (gl_FUNC_GETCWD): Don't define HAVE_MINIMALLY_WORKING_GETCWD if the code doesn't compile, as might happen if there's a macro but no function.

author	Paul Eggert <eggert@cs.ucla.edu>
date	Wed, 20 Feb 2013 00:04:35 -0800
parents	ab5135d5ff83
children	344018b6e5d7

rev	line source
17249 e542fd46ad6f maint: update all copyright year number ranges Eric Blake <eblake@redhat.com> parents: 16235 diff changeset	1 /* Copyright (C) 1991-1999, 2004-2013 Free Software Foundation, Inc.
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	2 This file is part of the GNU C Library.
5136 3d7c80bdf362 New getcwd module, imported from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	3
9309 bbbbbf4cd1c5 Change copyright notice from GPLv2+ to GPLv3+. Bruno Haible <bruno@clisp.org> parents: 8474 diff changeset	4 This program is free software: you can redistribute it and/or modify
5136 3d7c80bdf362 New getcwd module, imported from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	5 it under the terms of the GNU General Public License as published by
9309 bbbbbf4cd1c5 Change copyright notice from GPLv2+ to GPLv3+. Bruno Haible <bruno@clisp.org> parents: 8474 diff changeset	6 the Free Software Foundation; either version 3 of the License, or
bbbbbf4cd1c5 Change copyright notice from GPLv2+ to GPLv3+. Bruno Haible <bruno@clisp.org> parents: 8474 diff changeset	7 (at your option) any later version.
5136 3d7c80bdf362 New getcwd module, imported from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	8
3d7c80bdf362 New getcwd module, imported from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	9 This program is distributed in the hope that it will be useful,
3d7c80bdf362 New getcwd module, imported from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	10 but WITHOUT ANY WARRANTY; without even the implied warranty of
3d7c80bdf362 New getcwd module, imported from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3d7c80bdf362 New getcwd module, imported from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	12 GNU General Public License for more details.
3d7c80bdf362 New getcwd module, imported from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	13
9309 bbbbbf4cd1c5 Change copyright notice from GPLv2+ to GPLv3+. Bruno Haible <bruno@clisp.org> parents: 8474 diff changeset	14 You should have received a copy of the GNU General Public License
bbbbbf4cd1c5 Change copyright notice from GPLv2+ to GPLv3+. Bruno Haible <bruno@clisp.org> parents: 8474 diff changeset	15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
5136 3d7c80bdf362 New getcwd module, imported from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	16
7302 8a1a9361108c * _fpending.c: Include <config.h> unconditionally, since we no Paul Eggert <eggert@cs.ucla.edu> parents: 6949 diff changeset	17 #if !_LIBC
6259 96c32553b4c6 Use a consistent style for including <config.h>. Paul Eggert <eggert@cs.ucla.edu> parents: 5955 diff changeset	18 # include <config.h>
8199 51d32a83a7df Move more declarations into <unistd.h>. Bruno Haible <bruno@clisp.org> parents: 8075 diff changeset	19 # include <unistd.h>
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	20 #endif
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	21
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	22 #include <errno.h>
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	23 #include <sys/types.h>
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	24 #include <sys/stat.h>
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	25 #include <stdbool.h>
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	26 #include <stddef.h>
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	27
5955 ace6ea191424 Assume HAVE_FCNTL_H (i.e., include <fcntl.h> unconditionally, Jim Meyering <jim@meyering.net> parents: 5907 diff changeset	28 #include <fcntl.h> /* For AT_FDCWD on Solaris 9. */
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	29
15661 0aac3aa8d8fd getcwd: don't fail in a deep directory on a system without openat Jim Meyering <meyering@redhat.com> parents: 15522 diff changeset	30 /* If this host provides the openat function or if we're using the
17311 ab5135d5ff83 getcwd: break fdopendir + save_cwd recursive loop (Bug#13516) Paul Eggert <eggert@cs.ucla.edu> parents: 17249 diff changeset	31 gnulib replacement function with a native fdopendir, then enable
ab5135d5ff83 getcwd: break fdopendir + save_cwd recursive loop (Bug#13516) Paul Eggert <eggert@cs.ucla.edu> parents: 17249 diff changeset	32 code below to make getcwd more efficient and robust. */
ab5135d5ff83 getcwd: break fdopendir + save_cwd recursive loop (Bug#13516) Paul Eggert <eggert@cs.ucla.edu> parents: 17249 diff changeset	33 #if defined HAVE_OPENAT \|\| (defined GNULIB_OPENAT && defined HAVE_FDOPENDIR)
9535 fdfe023323f5 getcwd.c: Use a more readable witness: HAVE_OPENAT_SUPPORT Petr Salinger <Petr.Salinger@seznam.cz> parents: 9534 diff changeset	34 # define HAVE_OPENAT_SUPPORT 1
fdfe023323f5 getcwd.c: Use a more readable witness: HAVE_OPENAT_SUPPORT Petr Salinger <Petr.Salinger@seznam.cz> parents: 9534 diff changeset	35 #else
fdfe023323f5 getcwd.c: Use a more readable witness: HAVE_OPENAT_SUPPORT Petr Salinger <Petr.Salinger@seznam.cz> parents: 9534 diff changeset	36 # define HAVE_OPENAT_SUPPORT 0
9534 36c5c8024476 Port to GNU/kFreeBSD - FreeBSD kernel + GNU libc, Jim Meyering <meyering@redhat.com> parents: 9353 diff changeset	37 #endif
36c5c8024476 Port to GNU/kFreeBSD - FreeBSD kernel + GNU libc, Jim Meyering <meyering@redhat.com> parents: 9353 diff changeset	38
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	39 #ifndef __set_errno
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	40 # define __set_errno(val) (errno = (val))
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	41 #endif
5136 3d7c80bdf362 New getcwd module, imported from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	42
6949 96af1224c6fa * backupfile.c, dirfd.h, fts.c, getcwd.c, glob.c, glob_.h: Paul Eggert <eggert@cs.ucla.edu> parents: 6934 diff changeset	43 #include <dirent.h>
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	44 #ifndef _D_EXACT_NAMLEN
6934 d68ff786c180 * lib/getloadavg.c: Use __VMS, not VMS. Paul Eggert <eggert@cs.ucla.edu> parents: 6912 diff changeset	45 # define _D_EXACT_NAMLEN(d) strlen ((d)->d_name)
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	46 #endif
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	47 #ifndef _D_ALLOC_NAMLEN
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	48 # define _D_ALLOC_NAMLEN(d) (_D_EXACT_NAMLEN (d) + 1)
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	49 #endif
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	50
6275 fd0ccce602e4 Sync from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: 6259 diff changeset	51 #include <unistd.h>
5136 3d7c80bdf362 New getcwd module, imported from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	52 #include <stdlib.h>
3d7c80bdf362 New getcwd module, imported from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	53 #include <string.h>
3d7c80bdf362 New getcwd module, imported from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	54
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	55 #if _LIBC
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	56 # ifndef mempcpy
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	57 # define mempcpy __mempcpy
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	58 # endif
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	59 #endif
5136 3d7c80bdf362 New getcwd module, imported from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	60
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	61 #ifndef MAX
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	62 # define MAX(a, b) ((a) < (b) ? (b) : (a))
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	63 #endif
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	64 #ifndef MIN
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	65 # define MIN(a, b) ((a) < (b) ? (a) : (b))
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	66 #endif
5136 3d7c80bdf362 New getcwd module, imported from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	67
15496 451ec8bd8a1c pathmax: Leave PATH_MAX undefined on the Hurd, and a constant otherwise. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	68 #include "pathmax.h"
451ec8bd8a1c pathmax: Leave PATH_MAX undefined on the Hurd, and a constant otherwise. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	69
451ec8bd8a1c pathmax: Leave PATH_MAX undefined on the Hurd, and a constant otherwise. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	70 /* In this file, PATH_MAX only serves as a threshold for choosing among two
451ec8bd8a1c pathmax: Leave PATH_MAX undefined on the Hurd, and a constant otherwise. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	71 algorithms. */
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	72 #ifndef PATH_MAX
15496 451ec8bd8a1c pathmax: Leave PATH_MAX undefined on the Hurd, and a constant otherwise. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	73 # define PATH_MAX 8192
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	74 #endif
5136 3d7c80bdf362 New getcwd module, imported from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	75
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	76 #if D_INO_IN_DIRENT
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	77 # define MATCHING_INO(dp, ino) ((dp)->d_ino == (ino))
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	78 #else
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	79 # define MATCHING_INO(dp, ino) true
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	80 #endif
5136 3d7c80bdf362 New getcwd module, imported from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	81
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	82 #if !_LIBC
9353 20db465217b4 Use rpl_ prefix for functions, so as to avoid endless recursions in weird cases. Bruno Haible <bruno@clisp.org> parents: 9309 diff changeset	83 # define __getcwd rpl_getcwd
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	84 # define __lstat lstat
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	85 # define __closedir closedir
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	86 # define __opendir opendir
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	87 # define __readdir readdir
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	88 #endif
7863 cb2590895141 New module 'fchdir'. Bruno Haible <bruno@clisp.org> parents: 7302 diff changeset	89
cb2590895141 New module 'fchdir'. Bruno Haible <bruno@clisp.org> parents: 7302 diff changeset	90 /* The results of opendir() in this file are not used with dirfd and fchdir,
11938 7cbcde229d97 backupfile, chdir-long, fts, savedir: make safer Eric Blake <ebb9@byu.net> parents: 10663 diff changeset	91 and we do not leak fds to any single-threaded code that could use stdio,
7cbcde229d97 backupfile, chdir-long, fts, savedir: make safer Eric Blake <ebb9@byu.net> parents: 10663 diff changeset	92 therefore save some unnecessary recursion in fchdir.c.
7cbcde229d97 backupfile, chdir-long, fts, savedir: make safer Eric Blake <ebb9@byu.net> parents: 10663 diff changeset	93 FIXME - if the kernel ever adds support for multi-thread safety for
7cbcde229d97 backupfile, chdir-long, fts, savedir: make safer Eric Blake <ebb9@byu.net> parents: 10663 diff changeset	94 avoiding standard fds, then we should use opendir_safer and
7cbcde229d97 backupfile, chdir-long, fts, savedir: make safer Eric Blake <ebb9@byu.net> parents: 10663 diff changeset	95 openat_safer. */
7863 cb2590895141 New module 'fchdir'. Bruno Haible <bruno@clisp.org> parents: 7302 diff changeset	96 #undef opendir
cb2590895141 New module 'fchdir'. Bruno Haible <bruno@clisp.org> parents: 7302 diff changeset	97 #undef closedir
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	98
5907 c47674a83a78 Sync from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: 5848 diff changeset	99 /* Get the name of the current working directory, and put it in SIZE
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	100 bytes of BUF. Returns NULL if the directory couldn't be determined or
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	101 SIZE was too small. If successful, returns BUF. In GNU, if BUF is
16235 18a38c9615f0 In commentary, do not use ` to quote. Paul Eggert <eggert@cs.ucla.edu> parents: 16201 diff changeset	102 NULL, an array is allocated with 'malloc'; the array is SIZE bytes long,
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	103 unless SIZE == 0, in which case it is as big as necessary. */
5136 3d7c80bdf362 New getcwd module, imported from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	104
3d7c80bdf362 New getcwd module, imported from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	105 char *
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	106 __getcwd (char *buf, size_t size)
5136 3d7c80bdf362 New getcwd module, imported from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	107 {
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	108 /* Lengths of big file name components and entire file names, and a
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	109 deep level of file name nesting. These numbers are not upper
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	110 bounds; they are merely large values suitable for initial
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	111 allocations, designed to be large enough for most real-world
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	112 uses. */
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	113 enum
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	114 {
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	115 BIG_FILE_NAME_COMPONENT_LENGTH = 255,
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	116 BIG_FILE_NAME_LENGTH = MIN (4095, PATH_MAX - 1),
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	117 DEEP_NESTING = 100
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	118 };
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	119
9535 fdfe023323f5 getcwd.c: Use a more readable witness: HAVE_OPENAT_SUPPORT Petr Salinger <Petr.Salinger@seznam.cz> parents: 9534 diff changeset	120 #if HAVE_OPENAT_SUPPORT
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	121 int fd = AT_FDCWD;
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	122 bool fd_needs_closing = false;
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	123 #else
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	124 char dots[DEEP_NESTING * sizeof ".." + BIG_FILE_NAME_COMPONENT_LENGTH + 1];
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	125 char *dotlist = dots;
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	126 size_t dotsize = sizeof dots;
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	127 size_t dotlen = 0;
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	128 #endif
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	129 DIR *dirstream = NULL;
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	130 dev_t rootdev, thisdev;
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	131 ino_t rootino, thisino;
5907 c47674a83a78 Sync from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: 5848 diff changeset	132 char *dir;
c47674a83a78 Sync from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: 5848 diff changeset	133 register char *dirp;
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	134 struct stat st;
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	135 size_t allocated = size;
5499 41fd04e6a198 (is_ENAMETOOLONG): New macro. Paul Eggert <eggert@cs.ucla.edu> parents: 5491 diff changeset	136 size_t used;
41fd04e6a198 (is_ENAMETOOLONG): New macro. Paul Eggert <eggert@cs.ucla.edu> parents: 5491 diff changeset	137
17335 840c32a600aa getcwd: support coreutils better Paul Eggert <eggert@cs.ucla.edu> parents: 17311 diff changeset	138 #if HAVE_MINIMALLY_WORKING_GETCWD
13468 df8d11635b39 getcwd: on Solaris, work better if ancestors are inaccessible Paul R. Eggert <eggert@cs.ucla.edu> parents: 12559 diff changeset	139 /* If AT_FDCWD is not defined, the algorithm below is O(N**2) and
df8d11635b39 getcwd: on Solaris, work better if ancestors are inaccessible Paul R. Eggert <eggert@cs.ucla.edu> parents: 12559 diff changeset	140 this is much slower than the system getcwd (at least on
df8d11635b39 getcwd: on Solaris, work better if ancestors are inaccessible Paul R. Eggert <eggert@cs.ucla.edu> parents: 12559 diff changeset	141 GNU/Linux). So trust the system getcwd's results unless they
df8d11635b39 getcwd: on Solaris, work better if ancestors are inaccessible Paul R. Eggert <eggert@cs.ucla.edu> parents: 12559 diff changeset	142 look suspicious.
8217 f43bac5db7d2 * lib/getcwd.c (__getcwd): Undo previous change; it mishandled Paul Eggert <eggert@cs.ucla.edu> parents: 8216 diff changeset	143
f43bac5db7d2 * lib/getcwd.c (__getcwd): Undo previous change; it mishandled Paul Eggert <eggert@cs.ucla.edu> parents: 8216 diff changeset	144 Use the system getcwd even if we have openat support, since the
f43bac5db7d2 * lib/getcwd.c (__getcwd): Undo previous change; it mishandled Paul Eggert <eggert@cs.ucla.edu> parents: 8216 diff changeset	145 system getcwd works even when a parent is unreadable, while the
16113 80ff47677300 getcwd: Work around getcwd bug on AIX 5..7. Bruno Haible <bruno@clisp.org> parents: 15661 diff changeset	146 openat-based approach does not.
80ff47677300 getcwd: Work around getcwd bug on AIX 5..7. Bruno Haible <bruno@clisp.org> parents: 15661 diff changeset	147
80ff47677300 getcwd: Work around getcwd bug on AIX 5..7. Bruno Haible <bruno@clisp.org> parents: 15661 diff changeset	148 But on AIX 5.1..7.1, the system getcwd is not even minimally
80ff47677300 getcwd: Work around getcwd bug on AIX 5..7. Bruno Haible <bruno@clisp.org> parents: 15661 diff changeset	149 working: If the current directory name is slightly longer than
80ff47677300 getcwd: Work around getcwd bug on AIX 5..7. Bruno Haible <bruno@clisp.org> parents: 15661 diff changeset	150 PATH_MAX, it omits the first directory component and returns
80ff47677300 getcwd: Work around getcwd bug on AIX 5..7. Bruno Haible <bruno@clisp.org> parents: 15661 diff changeset	151 this wrong result with errno = 0. */
8217 f43bac5db7d2 * lib/getcwd.c (__getcwd): Undo previous change; it mishandled Paul Eggert <eggert@cs.ucla.edu> parents: 8216 diff changeset	152
f43bac5db7d2 * lib/getcwd.c (__getcwd): Undo previous change; it mishandled Paul Eggert <eggert@cs.ucla.edu> parents: 8216 diff changeset	153 # undef getcwd
f43bac5db7d2 * lib/getcwd.c (__getcwd): Undo previous change; it mishandled Paul Eggert <eggert@cs.ucla.edu> parents: 8216 diff changeset	154 dir = getcwd (buf, size);
15522 0c9c512b8944 getcwd: fix test failures on mingw Eric Blake <eblake@redhat.com> parents: 15496 diff changeset	155 if (dir \|\| (size && errno == ERANGE))
8217 f43bac5db7d2 * lib/getcwd.c (__getcwd): Undo previous change; it mishandled Paul Eggert <eggert@cs.ucla.edu> parents: 8216 diff changeset	156 return dir;
13468 df8d11635b39 getcwd: on Solaris, work better if ancestors are inaccessible Paul R. Eggert <eggert@cs.ucla.edu> parents: 12559 diff changeset	157
df8d11635b39 getcwd: on Solaris, work better if ancestors are inaccessible Paul R. Eggert <eggert@cs.ucla.edu> parents: 12559 diff changeset	158 /* Solaris getcwd (NULL, 0) fails with errno == EINVAL, but it has
df8d11635b39 getcwd: on Solaris, work better if ancestors are inaccessible Paul R. Eggert <eggert@cs.ucla.edu> parents: 12559 diff changeset	159 internal magic that lets it work even if an ancestor directory is
df8d11635b39 getcwd: on Solaris, work better if ancestors are inaccessible Paul R. Eggert <eggert@cs.ucla.edu> parents: 12559 diff changeset	160 inaccessible, which is better in many cases. So in this case try
df8d11635b39 getcwd: on Solaris, work better if ancestors are inaccessible Paul R. Eggert <eggert@cs.ucla.edu> parents: 12559 diff changeset	161 again with a buffer that's almost always big enough. */
df8d11635b39 getcwd: on Solaris, work better if ancestors are inaccessible Paul R. Eggert <eggert@cs.ucla.edu> parents: 12559 diff changeset	162 if (errno == EINVAL && buf == NULL && size == 0)
df8d11635b39 getcwd: on Solaris, work better if ancestors are inaccessible Paul R. Eggert <eggert@cs.ucla.edu> parents: 12559 diff changeset	163 {
df8d11635b39 getcwd: on Solaris, work better if ancestors are inaccessible Paul R. Eggert <eggert@cs.ucla.edu> parents: 12559 diff changeset	164 char big_buffer[BIG_FILE_NAME_LENGTH + 1];
df8d11635b39 getcwd: on Solaris, work better if ancestors are inaccessible Paul R. Eggert <eggert@cs.ucla.edu> parents: 12559 diff changeset	165 dir = getcwd (big_buffer, sizeof big_buffer);
df8d11635b39 getcwd: on Solaris, work better if ancestors are inaccessible Paul R. Eggert <eggert@cs.ucla.edu> parents: 12559 diff changeset	166 if (dir)
df8d11635b39 getcwd: on Solaris, work better if ancestors are inaccessible Paul R. Eggert <eggert@cs.ucla.edu> parents: 12559 diff changeset	167 return strdup (dir);
df8d11635b39 getcwd: on Solaris, work better if ancestors are inaccessible Paul R. Eggert <eggert@cs.ucla.edu> parents: 12559 diff changeset	168 }
df8d11635b39 getcwd: on Solaris, work better if ancestors are inaccessible Paul R. Eggert <eggert@cs.ucla.edu> parents: 12559 diff changeset	169
df8d11635b39 getcwd: on Solaris, work better if ancestors are inaccessible Paul R. Eggert <eggert@cs.ucla.edu> parents: 12559 diff changeset	170 # if HAVE_PARTLY_WORKING_GETCWD
df8d11635b39 getcwd: on Solaris, work better if ancestors are inaccessible Paul R. Eggert <eggert@cs.ucla.edu> parents: 12559 diff changeset	171 /* The system getcwd works, except it sometimes fails when it
df8d11635b39 getcwd: on Solaris, work better if ancestors are inaccessible Paul R. Eggert <eggert@cs.ucla.edu> parents: 12559 diff changeset	172 shouldn't, setting errno to ERANGE, ENAMETOOLONG, or ENOENT. */
df8d11635b39 getcwd: on Solaris, work better if ancestors are inaccessible Paul R. Eggert <eggert@cs.ucla.edu> parents: 12559 diff changeset	173 if (errno != ERANGE && errno != ENAMETOOLONG && errno != ENOENT)
df8d11635b39 getcwd: on Solaris, work better if ancestors are inaccessible Paul R. Eggert <eggert@cs.ucla.edu> parents: 12559 diff changeset	174 return NULL;
df8d11635b39 getcwd: on Solaris, work better if ancestors are inaccessible Paul R. Eggert <eggert@cs.ucla.edu> parents: 12559 diff changeset	175 # endif
8217 f43bac5db7d2 * lib/getcwd.c (__getcwd): Undo previous change; it mishandled Paul Eggert <eggert@cs.ucla.edu> parents: 8216 diff changeset	176 #endif
f43bac5db7d2 * lib/getcwd.c (__getcwd): Undo previous change; it mishandled Paul Eggert <eggert@cs.ucla.edu> parents: 8216 diff changeset	177
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	178 if (size == 0)
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	179 {
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	180 if (buf != NULL)
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	181 {
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	182 __set_errno (EINVAL);
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	183 return NULL;
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	184 }
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	185
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	186 allocated = BIG_FILE_NAME_LENGTH + 1;
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	187 }
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	188
5499 41fd04e6a198 (is_ENAMETOOLONG): New macro. Paul Eggert <eggert@cs.ucla.edu> parents: 5491 diff changeset	189 if (buf == NULL)
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	190 {
5907 c47674a83a78 Sync from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: 5848 diff changeset	191 dir = malloc (allocated);
c47674a83a78 Sync from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: 5848 diff changeset	192 if (dir == NULL)
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	193 return NULL;
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	194 }
5499 41fd04e6a198 (is_ENAMETOOLONG): New macro. Paul Eggert <eggert@cs.ucla.edu> parents: 5491 diff changeset	195 else
5907 c47674a83a78 Sync from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: 5848 diff changeset	196 dir = buf;
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	197
5907 c47674a83a78 Sync from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: 5848 diff changeset	198 dirp = dir + allocated;
c47674a83a78 Sync from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: 5848 diff changeset	199 *--dirp = '\0';
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	200
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	201 if (__lstat (".", &st) < 0)
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	202 goto lose;
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	203 thisdev = st.st_dev;
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	204 thisino = st.st_ino;
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	205
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	206 if (__lstat ("/", &st) < 0)
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	207 goto lose;
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	208 rootdev = st.st_dev;
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	209 rootino = st.st_ino;
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	210
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	211 while (!(thisdev == rootdev && thisino == rootino))
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	212 {
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	213 struct dirent *d;
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	214 dev_t dotdev;
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	215 ino_t dotino;
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	216 bool mount_point;
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	217 int parent_status;
6439 3fd547210013 * getcwd.c (__getcwd): Don't assume that system calls after readdir Paul Eggert <eggert@cs.ucla.edu> parents: 6305 diff changeset	218 size_t dirroom;
3fd547210013 * getcwd.c (__getcwd): Don't assume that system calls after readdir Paul Eggert <eggert@cs.ucla.edu> parents: 6305 diff changeset	219 size_t namlen;
6912 314715e0260d Merge from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: 6647 diff changeset	220 bool use_d_ino = true;
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	221
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	222 /* Look at the parent directory. */
9535 fdfe023323f5 getcwd.c: Use a more readable witness: HAVE_OPENAT_SUPPORT Petr Salinger <Petr.Salinger@seznam.cz> parents: 9534 diff changeset	223 #if HAVE_OPENAT_SUPPORT
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	224 fd = openat (fd, "..", O_RDONLY);
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	225 if (fd < 0)
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	226 goto lose;
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	227 fd_needs_closing = true;
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	228 parent_status = fstat (fd, &st);
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	229 #else
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	230 dotlist[dotlen++] = '.';
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	231 dotlist[dotlen++] = '.';
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	232 dotlist[dotlen] = '\0';
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	233 parent_status = __lstat (dotlist, &st);
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	234 #endif
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	235 if (parent_status != 0)
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	236 goto lose;
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	237
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	238 if (dirstream && __closedir (dirstream) != 0)
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	239 {
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	240 dirstream = NULL;
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	241 goto lose;
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	242 }
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	243
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	244 /* Figure out if this directory is a mount point. */
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	245 dotdev = st.st_dev;
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	246 dotino = st.st_ino;
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	247 mount_point = dotdev != thisdev;
5136 3d7c80bdf362 New getcwd module, imported from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	248
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	249 /* Search for the last directory. */
9535 fdfe023323f5 getcwd.c: Use a more readable witness: HAVE_OPENAT_SUPPORT Petr Salinger <Petr.Salinger@seznam.cz> parents: 9534 diff changeset	250 #if HAVE_OPENAT_SUPPORT
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	251 dirstream = fdopendir (fd);
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	252 if (dirstream == NULL)
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	253 goto lose;
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	254 fd_needs_closing = false;
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	255 #else
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	256 dirstream = __opendir (dotlist);
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	257 if (dirstream == NULL)
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	258 goto lose;
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	259 dotlist[dotlen++] = '/';
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	260 #endif
6439 3fd547210013 * getcwd.c (__getcwd): Don't assume that system calls after readdir Paul Eggert <eggert@cs.ucla.edu> parents: 6305 diff changeset	261 for (;;)
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	262 {
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	263 /* Clear errno to distinguish EOF from error if readdir returns
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	264 NULL. */
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	265 __set_errno (0);
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	266 d = __readdir (dirstream);
6912 314715e0260d Merge from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: 6647 diff changeset	267
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	268 /* When we've iterated through all directory entries without finding
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	269 one with a matching d_ino, rewind the stream and consider each
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	270 name again, but this time, using lstat. This is necessary in a
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	271 chroot on at least one system (glibc-2.3.6 + linux 2.6.12), where
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	272 .., ../.., ../../.., etc. all had the same device number, yet the
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	273 d_ino values for entries in / did not match those obtained
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	274 via lstat. */
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	275 if (d == NULL && errno == 0 && use_d_ino)
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	276 {
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	277 use_d_ino = false;
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	278 rewinddir (dirstream);
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	279 d = __readdir (dirstream);
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	280 }
6912 314715e0260d Merge from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: 6647 diff changeset	281
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	282 if (d == NULL)
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	283 {
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	284 if (errno == 0)
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	285 /* EOF on dirstream, which can mean e.g., that the current
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	286 directory has been removed. */
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	287 __set_errno (ENOENT);
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	288 goto lose;
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	289 }
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	290 if (d->d_name[0] == '.' &&
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	291 (d->d_name[1] == '\0' \|\|
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	292 (d->d_name[1] == '.' && d->d_name[2] == '\0')))
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	293 continue;
6912 314715e0260d Merge from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: 6647 diff changeset	294
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	295 if (use_d_ino)
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	296 {
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	297 bool match = (MATCHING_INO (d, thisino) \|\| mount_point);
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	298 if (! match)
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	299 continue;
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	300 }
6912 314715e0260d Merge from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: 6647 diff changeset	301
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	302 {
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	303 int entry_status;
9535 fdfe023323f5 getcwd.c: Use a more readable witness: HAVE_OPENAT_SUPPORT Petr Salinger <Petr.Salinger@seznam.cz> parents: 9534 diff changeset	304 #if HAVE_OPENAT_SUPPORT
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	305 entry_status = fstatat (fd, d->d_name, &st, AT_SYMLINK_NOFOLLOW);
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	306 #else
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	307 /* Compute size needed for this file name, or for the file
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	308 name ".." in the same directory, whichever is larger.
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	309 Room for ".." might be needed the next time through
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	310 the outer loop. */
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	311 size_t name_alloc = _D_ALLOC_NAMLEN (d);
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	312 size_t filesize = dotlen + MAX (sizeof "..", name_alloc);
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	313
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	314 if (filesize < dotlen)
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	315 goto memory_exhausted;
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	316
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	317 if (dotsize < filesize)
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	318 {
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	319 /* My, what a deep directory tree you have, Grandma. */
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	320 size_t newsize = MAX (filesize, dotsize * 2);
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	321 size_t i;
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	322 if (newsize < dotsize)
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	323 goto memory_exhausted;
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	324 if (dotlist != dots)
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	325 free (dotlist);
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	326 dotlist = malloc (newsize);
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	327 if (dotlist == NULL)
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	328 goto lose;
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	329 dotsize = newsize;
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	330
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	331 i = 0;
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	332 do
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	333 {
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	334 dotlist[i++] = '.';
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	335 dotlist[i++] = '.';
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	336 dotlist[i++] = '/';
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	337 }
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	338 while (i < dotlen);
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	339 }
5136 3d7c80bdf362 New getcwd module, imported from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	340
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	341 memcpy (dotlist + dotlen, d->d_name, _D_ALLOC_NAMLEN (d));
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	342 entry_status = __lstat (dotlist, &st);
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	343 #endif
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	344 /* We don't fail here if we cannot stat() a directory entry.
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	345 This can happen when (network) file systems fail. If this
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	346 entry is in fact the one we are looking for we will find
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	347 out soon as we reach the end of the directory without
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	348 having found anything. */
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	349 if (entry_status == 0 && S_ISDIR (st.st_mode)
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	350 && st.st_dev == thisdev && st.st_ino == thisino)
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	351 break;
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	352 }
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	353 }
6439 3fd547210013 * getcwd.c (__getcwd): Don't assume that system calls after readdir Paul Eggert <eggert@cs.ucla.edu> parents: 6305 diff changeset	354
3fd547210013 * getcwd.c (__getcwd): Don't assume that system calls after readdir Paul Eggert <eggert@cs.ucla.edu> parents: 6305 diff changeset	355 dirroom = dirp - dir;
3fd547210013 * getcwd.c (__getcwd): Don't assume that system calls after readdir Paul Eggert <eggert@cs.ucla.edu> parents: 6305 diff changeset	356 namlen = _D_EXACT_NAMLEN (d);
3fd547210013 * getcwd.c (__getcwd): Don't assume that system calls after readdir Paul Eggert <eggert@cs.ucla.edu> parents: 6305 diff changeset	357
3fd547210013 * getcwd.c (__getcwd): Don't assume that system calls after readdir Paul Eggert <eggert@cs.ucla.edu> parents: 6305 diff changeset	358 if (dirroom <= namlen)
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	359 {
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	360 if (size != 0)
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	361 {
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	362 __set_errno (ERANGE);
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	363 goto lose;
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	364 }
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	365 else
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	366 {
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	367 char *tmp;
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	368 size_t oldsize = allocated;
6439 3fd547210013 * getcwd.c (__getcwd): Don't assume that system calls after readdir Paul Eggert <eggert@cs.ucla.edu> parents: 6305 diff changeset	369
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	370 allocated += MAX (allocated, namlen);
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	371 if (allocated < oldsize
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	372 \|\| ! (tmp = realloc (dir, allocated)))
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	373 goto memory_exhausted;
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	374
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	375 /* Move current contents up to the end of the buffer.
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	376 This is guaranteed to be non-overlapping. */
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	377 dirp = memcpy (tmp + allocated - (oldsize - dirroom),
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	378 tmp + dirroom,
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	379 oldsize - dirroom);
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	380 dir = tmp;
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	381 }
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11970 diff changeset	382 }
6439 3fd547210013 * getcwd.c (__getcwd): Don't assume that system calls after readdir Paul Eggert <eggert@cs.ucla.edu> parents: 6305 diff changeset	383 dirp -= namlen;
3fd547210013 * getcwd.c (__getcwd): Don't assume that system calls after readdir Paul Eggert <eggert@cs.ucla.edu> parents: 6305 diff changeset	384 memcpy (dirp, d->d_name, namlen);
3fd547210013 * getcwd.c (__getcwd): Don't assume that system calls after readdir Paul Eggert <eggert@cs.ucla.edu> parents: 6305 diff changeset	385 *--dirp = '/';
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	386
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	387 thisdev = dotdev;
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	388 thisino = dotino;
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	389 }
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	390
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	391 if (dirstream && __closedir (dirstream) != 0)
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	392 {
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	393 dirstream = NULL;
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	394 goto lose;
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	395 }
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	396
5907 c47674a83a78 Sync from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: 5848 diff changeset	397 if (dirp == &dir[allocated - 1])
c47674a83a78 Sync from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: 5848 diff changeset	398 *--dirp = '/';
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	399
9535 fdfe023323f5 getcwd.c: Use a more readable witness: HAVE_OPENAT_SUPPORT Petr Salinger <Petr.Salinger@seznam.cz> parents: 9534 diff changeset	400 #if ! HAVE_OPENAT_SUPPORT
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	401 if (dotlist != dots)
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	402 free (dotlist);
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	403 #endif
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	404
5907 c47674a83a78 Sync from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: 5848 diff changeset	405 used = dir + allocated - dirp;
c47674a83a78 Sync from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: 5848 diff changeset	406 memmove (dir, dirp, used);
5499 41fd04e6a198 (is_ENAMETOOLONG): New macro. Paul Eggert <eggert@cs.ucla.edu> parents: 5491 diff changeset	407
8474 11ae25a37675 * lib/getcwd.c (__getcwd): Remove redundant comparison of buf to NULL. Paul Eggert <eggert@cs.ucla.edu> parents: 8217 diff changeset	408 if (size == 0)
5499 41fd04e6a198 (is_ENAMETOOLONG): New macro. Paul Eggert <eggert@cs.ucla.edu> parents: 5491 diff changeset	409 /* Ensure that the buffer is only as large as necessary. */
5907 c47674a83a78 Sync from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: 5848 diff changeset	410 buf = realloc (dir, used);
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	411
5499 41fd04e6a198 (is_ENAMETOOLONG): New macro. Paul Eggert <eggert@cs.ucla.edu> parents: 5491 diff changeset	412 if (buf == NULL)
16235 18a38c9615f0 In commentary, do not use ` to quote. Paul Eggert <eggert@cs.ucla.edu> parents: 16201 diff changeset	413 /* Either buf was NULL all along, or 'realloc' failed but
5499 41fd04e6a198 (is_ENAMETOOLONG): New macro. Paul Eggert <eggert@cs.ucla.edu> parents: 5491 diff changeset	414 we still have the original string. */
5907 c47674a83a78 Sync from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: 5848 diff changeset	415 buf = dir;
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	416
5499 41fd04e6a198 (is_ENAMETOOLONG): New macro. Paul Eggert <eggert@cs.ucla.edu> parents: 5491 diff changeset	417 return buf;
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	418
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	419 memory_exhausted:
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	420 __set_errno (ENOMEM);
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	421 lose:
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	422 {
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	423 int save = errno;
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	424 if (dirstream)
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	425 __closedir (dirstream);
9535 fdfe023323f5 getcwd.c: Use a more readable witness: HAVE_OPENAT_SUPPORT Petr Salinger <Petr.Salinger@seznam.cz> parents: 9534 diff changeset	426 #if HAVE_OPENAT_SUPPORT
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	427 if (fd_needs_closing)
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	428 close (fd);
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	429 #else
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	430 if (dotlist != dots)
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	431 free (dotlist);
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	432 #endif
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	433 if (buf == NULL)
5907 c47674a83a78 Sync from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: 5848 diff changeset	434 free (dir);
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	435 __set_errno (save);
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	436 }
5136 3d7c80bdf362 New getcwd module, imported from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	437 return NULL;
3d7c80bdf362 New getcwd module, imported from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	438 }
5491 b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	439
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	440 #ifdef weak_alias
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	441 weak_alias (__getcwd, getcwd)
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11. Paul Eggert <eggert@cs.ucla.edu> parents: 5136 diff changeset	442 #endif

Mercurial > gnulib

annotate lib/getcwd.c @ 17335:840c32a600aa