annotate src/realpath.c @ 2367:ecf1ebac70d8

[xemacs-hg @ 2004-11-04 23:05:23 by ben] commit mega-patch configure.in: Turn off -Winline and -Wchar-subscripts. Use the right set of cflags when compiling modules. Rewrite ldap configuration to separate the inclusion of lber (needed in recent Cygwin) from the basic checks for the needed libraries. add a function for MAKE_JUNK_C; initially code was added to generate xemacs.def using this, but it will need to be rewritten. add an rm -f for junk.c to avoid weird Cygwin bug with cp -f onto an existing file. Sort list of auto-detected functions and eliminate unused checks for stpcpy, setlocale and getwd. Add autodetection of Cygwin scanf problems BETA: Rewrite section on configure to indicate what flags are important and what not. digest-doc.c, make-dump-id.c, profile.c, sorted-doc.c: Add proper decls for main(). make-msgfile.c: Document that this is old junk. Move proposal to text.c. make-msgfile.lex: Move proposal to text.c. make-mswin-unicode.pl: Convert error-generating code so that the entire message will be seen as a single unrecognized token. mule/mule-ccl.el: Update docs. lispref/mule.texi: Update CCL docs. ldap/eldap.c: Mule-ize. Use EXTERNAL_LIST_LOOP_2 instead of deleted EXTERNAL_LIST_LOOP. * XEmacs 21.5.18 "chestnut" is released. --------------------------------------------------------------- MULE-RELATED WORK: --------------------------------------------------------------- --------------------------- byte-char conversion --------------------------- buffer.c, buffer.h, insdel.c, text.c: Port FSF algorithm for byte-char conversion, replacing broken previous version. Track the char position of the gap. Add functions to do char-byte conversion downwards as well as upwards. Move comments about algorithm workings to internals manual. --------------------------- work on types --------------------------- alloc.c, console-x-impl.h, dump-data.c, dump-data.h, dumper.c, dialog-msw.c, dired-msw.c, doc.c, editfns.c, esd.c, event-gtk.h, event-msw.c, events.c, file-coding.c, file-coding.h, fns.c, glyphs-eimage.c, glyphs-gtk.c, glyphs-msw.c, glyphs-shared.c, glyphs-x.c, glyphs.c, glyphs.h, gui.c, hpplay.c, imgproc.c, intl-win32.c, lrecord.h, lstream.c, keymap.c, lisp.h, libsst.c, linuxplay.c, miscplay.c, miscplay.h, mule-coding.c, nas.c, nt.c, ntheap.c, ntplay.c, objects-msw.c, objects-tty.c, objects-x.c, print.c, process-nt.c, process.c, redisplay.h, select-common.h, select-gtk.c, select-x.c, sgiplay.c, sound.c, sound.h, sunplay.c, sysfile.h, sysdep.c, syswindows.h, text.c, unexnt.c, win32.c, xgccache.c: Further work on types. This creates a full set of types for all the basic semantics of `char' that I have so far identified, so that its semantics can always be identified for the purposes of proper Mule-safe code, and the raw use of `char' always avoided. (1) More type renaming, for consistency of naming. Char_ASCII -> Ascbyte UChar_ASCII -> UAscbyte Char_Binary -> CBinbyte UChar_Binary -> Binbyte SChar_Binary -> SBinbyte (2) Introduce Rawbyte, CRawbyte, Boolbyte, Chbyte, UChbyte, and Bitbyte and use them. (3) New types Itext, Wexttext and Textcount for separating out the concepts of bytes and textual units (different under UTF-16 and UTF-32, which are potential internal encodings). (4) qxestr*_c -> qxestr*_ascii. lisp.h: New; goes with other qxe() functions. #### Maybe goes in a different section. lisp.h: Group generic int-type defs together with EMACS_INT defs. lisp.h: * lisp.h (WEXTTEXT_IS_WIDE) New defns. lisp.h: New type to replace places where int occurs as a boolean. It's signed because occasionally people may want to use -1 as an error value, and because unsigned ints are viral -- see comments in the internals manual against using them. dynarr.c: int -> Bytecount. --------------------------- Mule-izing --------------------------- device-x.c: Partially Mule-ize. dumper.c, dumper.h: Mule-ize. Use Rawbyte. Use stderr_out not printf. Use wext_*(). sysdep.c, syswindows.h, text.c: New Wexttext API for manipulation of external text that may be Unicode (e.g. startup code under Windows). emacs.c: Mule-ize. Properly deal with argv in external encoding. Use wext_*() and Wexttext. Use Rawbyte. #if 0 some old junk on SCO that is unlikely to be correct. Rewrite allocation code in run-temacs. emacs.c, symsinit.h, win32.c: Rename win32 init function and call it even earlier, to initialize mswindows_9x_p even earlier, for use in startup code (XEUNICODE_P). process.c: Use _wenviron not environ under Windows, to get Unicode environment variables. event-Xt.c: Mule-ize drag-n-drop related stuff. dragdrop.c, dragdrop.h, frame-x.c: Mule-ize. text.h: Add some more stand-in defines for particular kinds of conversion; use in Mule-ization work in frame-x.c etc. --------------------------- Freshening --------------------------- intl-auto-encap-win32.c, intl-auto-encap-win32.h: Regenerate. --------------------------- Unicode-work --------------------------- intl-win32.c, syswindows.h: Factor out common options to MultiByteToWideChar and WideCharToMultiByte. Add convert_unicode_to_multibyte_malloc() and convert_unicode_to_multibyte_dynarr() and use. Add stuff for alloca() conversion of multibyte/unicode. alloc.c: Use dfc_external_data_len() in case of unicode coding system. alloc.c, mule-charset.c: Don't zero out and reinit charset Unicode tables. This fucks up dump-time loading. Anyway, either we load them at dump time or run time, never both. unicode.c: Dump the blank tables as well. --------------------------------------------------------------- DOCUMENTATION, MOSTLY MULE-RELATED: --------------------------------------------------------------- EmacsFrame.c, emodules.c, event-Xt.c, fileio.c, input-method-xlib.c, mule-wnnfns.c, redisplay-gtk.c, redisplay-tty.c, redisplay-x.c, regex.c, sysdep.c: Add comment about Mule work needed. text.h: Add more documentation describing why DFC routines were not written to return their value. Add some other DFC documentation. console-msw.c, console-msw.h: Add pointer to docs in win32.c. emacs.c: Add comments on sources of doc info. text.c, charset.h, unicode.c, intl-win32.c, intl-encap-win32.c, text.h, file-coding.c, mule-coding.c: Collect background comments and related to text matters and internationalization, and proposals for work to be done, in text.c or Internals manual, stuff related to specific textual API's in text.h, and stuff related to internal implementation of Unicode conversion in unicode.c. Put lots of pointers to the comments to make them easier to find. s/mingw32.h, s/win32-common.h, s/win32-native.h, s/windowsnt.h, win32.c: Add bunches of new documentation on the different kinds of builds and environments under Windows and how they work. Collect this info in win32.c. Add pointers to these docs in the relevant s/* files. emacs.c: Document places with long comments. Remove comment about exiting, move to internals manual, put in pointer. event-stream.c: Move docs about event queues and focus to internals manual, put in pointer. events.h: Move docs about event stream callbacks to internals manual, put in pointer. profile.c, redisplay.c, signal.c: Move documentation to the Internals manual. process-nt.c: Add pointer to comment in win32-native.el. lisp.h: Add comments about some comment conventions. lisp.h: Add comment about the second argument. device-msw.c, redisplay-msw.c: @@#### comments are out-of-date. --------------------------------------------------------------- PDUMP WORK (MOTIVATED BY UNICODE CHANGES) --------------------------------------------------------------- alloc.c, buffer.c, bytecode.c, console-impl.h, console.c, device.c, dumper.c, lrecord.h, elhash.c, emodules.h, events.c, extents.c, frame.c, glyphs.c, glyphs.h, mule-charset.c, mule-coding.c, objects.c, profile.c, rangetab.c, redisplay.c, specifier.c, specifier.h, window.c, lstream.c, file-coding.h, file-coding.c: PDUMP: Properly implement dump_add_root_block(), which never worked before, and is necessary for dumping Unicode tables. Pdump name changes for accuracy: XD_STRUCT_PTR -> XD_BLOCK_PTR. XD_STRUCT_ARRAY -> XD_BLOCK_ARRAY. XD_C_STRING -> XD_ASCII_STRING. *_structure_* -> *_block_*. lrecord.h: some comments added about dump_add_root_block() vs dump_add_root_block_ptr(). extents.c: remove incorrect comment about pdump problems with gap array. --------------------------------------------------------------- ALLOCATION --------------------------------------------------------------- abbrev.c, alloc.c, bytecode.c, casefiddle.c, device-msw.c, device-x.c, dired-msw.c, doc.c, doprnt.c, dragdrop.c, editfns.c, emodules.c, file-coding.c, fileio.c, filelock.c, fns.c, glyphs-eimage.c, glyphs-gtk.c, glyphs-msw.c, glyphs-x.c, gui-msw.c, gui-x.c, imgproc.c, intl-win32.c, lread.c, menubar-gtk.c, menubar.c, nt.c, objects-msw.c, objects-x.c, print.c, process-nt.c, process-unix.c, process.c, realpath.c, redisplay.c, search.c, select-common.c, symbols.c, sysdep.c, syswindows.h, text.c, text.h, ui-byhand.c: New macros {alloca,xnew}_{itext,{i,ext,raw,bin,asc}bytes} for more convenient allocation of these commonly requested items. Modify functions to use alloca_ibytes, alloca_array, alloca_extbytes, xnew_ibytes, etc. also XREALLOC_ARRAY, xnew. alloc.c: Rewrite the allocation functions to factor out repeated code. Add assertions for freeing dumped data. lisp.h: Moved down and consolidated with other allocation stuff. lisp.h, dynarr.c: New functions for allocation that's very efficient when mostly in LIFO order. lisp.h, text.c, text.h: Factor out some stuff for general use by alloca()-conversion funs. text.h, lisp.h: Fill out convenience routines for allocating various kinds of bytes and put them in lisp.h. Use them in place of xmalloc(), ALLOCA(). text.h: Fill out the convenience functions so the _MALLOC() kinds match the alloca() kinds. --------------------------------------------------------------- ERROR-CHECKING --------------------------------------------------------------- text.h: Create ASSERT_ASCTEXT_ASCII() and ASSERT_ASCTEXT_ASCII_LEN() from similar Eistring checkers and change the Eistring checkers to use them instead. --------------------------------------------------------------- MACROS IN LISP.H --------------------------------------------------------------- lisp.h: Redo GCPRO declarations. Create a "base" set of functions that can be used to generate any kind of gcpro sets -- regular, ngcpro, nngcpro, private ones used in GC_EXTERNAL_LIST_LOOP_2. buffer.c, callint.c, chartab.c, console-msw.c, device-x.c, dialog-msw.c, dired.c, extents.c, ui-gtk.c, rangetab.c, nt.c, mule-coding.c, minibuf.c, menubar-msw.c, menubar.c, menubar-gtk.c, lread.c, lisp.h, gutter.c, glyphs.c, glyphs-widget.c, fns.c, fileio.c, file-coding.c, specifier.c: Eliminate EXTERNAL_LIST_LOOP, which does not check for circularities. Use EXTERNAL_LIST_LOOP_2 instead or EXTERNAL_LIST_LOOP_3 or EXTERNAL_PROPERTY_LIST_LOOP_3 or GC_EXTERNAL_LIST_LOOP_2 (new macro). Removed/redid comments on EXTERNAL_LIST_LOOP. --------------------------------------------------------------- SPACING FIXES --------------------------------------------------------------- callint.c, hftctl.c, number-gmp.c, process-unix.c: Spacing fixes. --------------------------------------------------------------- FIX FOR GEOMETRY PROBLEM IN FIRST FRAME --------------------------------------------------------------- unicode.c: Add workaround for newlib bug in sscanf() [should be fixed by release 1.5.12 of Cygwin]. toolbar.c: bug fix for problem of initial frame being 77 chars wide on Windows. will be overridden by my other ws. --------------------------------------------------------------- FIX FOR LEAKING PROCESS HANDLES: --------------------------------------------------------------- process-nt.c: Fixes for leaking handles. Inspired by work done by Adrian Aichner <adrian@xemacs.org>. --------------------------------------------------------------- FIX FOR CYGWIN BUG (Unicode-related): --------------------------------------------------------------- unicode.c: Add workaround for newlib bug in sscanf() [should be fixed by release 1.5.12 of Cygwin]. --------------------------------------------------------------- WARNING FIXES: --------------------------------------------------------------- console-stream.c: `reinit' is unused. compiler.h, event-msw.c, frame-msw.c, intl-encap-win32.c, text.h: Add stuff to deal with ANSI-aliasing warnings I got. regex.c: Gather includes together to avoid warning. --------------------------------------------------------------- CHANGES TO INITIALIZATION ROUTINES: --------------------------------------------------------------- buffer.c, emacs.c, console.c, debug.c, device-x.c, device.c, dragdrop.c, emodules.c, eval.c, event-Xt.c, event-gtk.c, event-msw.c, event-stream.c, event-tty.c, events.c, extents.c, faces.c, file-coding.c, fileio.c, font-lock.c, frame-msw.c, glyphs-widget.c, glyphs.c, gui-x.c, insdel.c, lread.c, lstream.c, menubar-gtk.c, menubar-x.c, minibuf.c, mule-wnnfns.c, objects-msw.c, objects.c, print.c, scrollbar-x.c, search.c, select-x.c, text.c, undo.c, unicode.c, window.c, symsinit.h: Call reinit_*() functions directly from emacs.c, for clarity. Factor out some redundant init code. Move disallowed stuff that had crept into vars_of_glyphs() into complex_vars_of_glyphs(). Call init_eval_semi_early() from eval.c not in the middle of vars_of_() in emacs.c since there should be no order dependency in the latter calls. --------------------------------------------------------------- ARMAGEDDON: --------------------------------------------------------------- alloc.c, emacs.c, lisp.h, print.c: Rename inhibit_non_essential_printing_operations to inhibit_non_essential_conversion_operations. text.c: Assert on !inhibit_non_essential_conversion_operations. console-msw.c, print.c: Don't do conversion in SetConsoleTitle or FindWindow to avoid problems during armageddon. Put #errors for NON_ASCII_INTERNAL_FORMAT in places where problems would arise. --------------------------------------------------------------- CHANGES TO THE BUILD PROCEDURE: --------------------------------------------------------------- config.h.in, s/cxux.h, s/usg5-4-2.h, m/powerpc.h: Add comment about correct ordering of this file. Rearrange everything to follow this -- put all #undefs together and before the s&m files. Add undefs for HAVE_ALLOCA, C_ALLOCA, BROKEN_ALLOCA_IN_FUNCTION_CALLS, STACK_DIRECTION. Remove unused HAVE_STPCPY, HAVE_GETWD, HAVE_SETLOCALE. m/gec63.h: Deleted; totally broken, not used at all, not in FSF. m/7300.h, m/acorn.h, m/alliant-2800.h, m/alliant.h, m/altos.h, m/amdahl.h, m/apollo.h, m/att3b.h, m/aviion.h, m/celerity.h, m/clipper.h, m/cnvrgnt.h, m/convex.h, m/cydra5.h, m/delta.h, m/delta88k.h, m/dpx2.h, m/elxsi.h, m/ews4800r.h, m/gould.h, m/hp300bsd.h, m/hp800.h, m/hp9000s300.h, m/i860.h, m/ibmps2-aix.h, m/ibmrs6000.h, m/ibmrt-aix.h, m/ibmrt.h, m/intel386.h, m/iris4d.h, m/iris5d.h, m/iris6d.h, m/irist.h, m/isi-ov.h, m/luna88k.h, m/m68k.h, m/masscomp.h, m/mg1.h, m/mips-nec.h, m/mips-siemens.h, m/mips.h, m/news.h, m/nh3000.h, m/nh4000.h, m/ns32000.h, m/orion105.h, m/pfa50.h, m/plexus.h, m/pmax.h, m/powerpc.h, m/pyrmips.h, m/sequent-ptx.h, m/sequent.h, m/sgi-challenge.h, m/symmetry.h, m/tad68k.h, m/tahoe.h, m/targon31.h, m/tekxd88.h, m/template.h, m/tower32.h, m/tower32v3.h, m/ustation.h, m/vax.h, m/wicat.h, m/xps100.h: Delete C_ALLOCA, HAVE_ALLOCA, STACK_DIRECTION, BROKEN_ALLOCA_IN_FUNCTION_CALLS. All of this is auto-detected. When in doubt, I followed recent FSF sources, which also have these things deleted.
author ben
date Thu, 04 Nov 2004 23:08:28 +0000
parents 0240ff815597
children ab71ad6ff3dd
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1 /*
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2 * realpath.c -- canonicalize pathname by removing symlinks
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3 * Copyright (C) 1993 Rick Sladkey <jrs@world.std.com>
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4 * Copyright (C) 2001, 2002 Ben Wing.
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5 *
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6
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7 This file is part of XEmacs.
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8
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9 XEmacs is free software; you can redistribute it and/or modify it
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10 under the terms of the GNU General Public License as published by the
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11 Free Software Foundation; either version 2, or (at your option) any
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12 later version.
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14 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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17 for more details.
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18
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19 You should have received a copy of the GNU General Public License
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20 along with XEmacs; see the file COPYING. If not, write to
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21 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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22 Boston, MA 02111-1307, USA. */
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23
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24 /* Synched up with: Not in FSF. */
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25
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26 /* This file has been Mule-ized, June 2001 by Ben Wing.
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27
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28 Everything in this file now works in terms of internal, not external,
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29 data. This is the only way to be safe, and it makes the code cleaner. */
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31 #include <config.h>
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32 #include "lisp.h"
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34 #include "sysfile.h"
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35 #include "sysdir.h"
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37 #define MAX_READLINKS 32
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38
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39 #ifdef WIN32_ANY
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40 #include "syswindows.h"
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41 #ifndef ELOOP
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42 #define ELOOP 10062 /* = WSAELOOP in winsock.h */
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43 #endif
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44 #endif
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45
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46 /* Length of start of absolute filename. */
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47 static int
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48 abs_start (const Ibyte *name)
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49 {
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50 #ifdef WIN32_ANY
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51 if (isalpha (*name) && IS_DEVICE_SEP (name[1])
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52 && IS_DIRECTORY_SEP (name[2]))
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53 return 3;
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54 else if (IS_DIRECTORY_SEP (*name))
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55 return IS_DIRECTORY_SEP (name[1]) ? 2 : 1;
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56 else
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57 return 0;
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58 #else /* not WIN32_ANY */
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59 return IS_DIRECTORY_SEP (*name) ? 1 : 0;
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60 #endif
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61 }
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63 /* Find real name of a file by resolving symbolic links and (under Windows)
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64 looking up the correct case of the file as it appears on the file
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65 system.
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66
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67 Under Windows, UNC servers and shares are lower-cased. Directories must
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
68 be given without trailing '/'. One day, this could read Win2K's reparse
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
69 points. */
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
70
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
71 static int
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
72 readlink_and_correct_case (const Ibyte *name, Ibyte *buf,
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
73 int size)
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
74 {
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
75 #ifndef WIN32_ANY
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
76 return qxe_readlink (name, buf, size);
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
77 #else
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
78 # ifdef CYGWIN
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
79 Ibyte *tmp;
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
80 int n = qxe_readlink (name, buf, size);
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
81 if (n >= 0 || errno != EINVAL)
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
82 return n;
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
83
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
84 /* The file may exist, but isn't a symlink. Try to find the
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
85 right name. */
2367
ecf1ebac70d8 [xemacs-hg @ 2004-11-04 23:05:23 by ben]
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parents: 1760
diff changeset
86 tmp =
ecf1ebac70d8 [xemacs-hg @ 2004-11-04 23:05:23 by ben]
ben
parents: 1760
diff changeset
87 alloca_ibytes (cygwin_posix_to_win32_path_list_buf_size ((char *) name));
1116
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ben
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diff changeset
88 cygwin_posix_to_win32_path_list ((char *) name, (char *) tmp);
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
89 name = tmp;
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
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parents: 988
diff changeset
90 # endif
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
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diff changeset
91
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
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parents: 988
diff changeset
92 {
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
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diff changeset
93 int len = 0;
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
94 int err = 0;
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
95 const Ibyte *lastname;
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
96 int count = 0;
1204
e22b0213b713 [xemacs-hg @ 2003-01-12 11:07:58 by michaels]
michaels
parents: 1116
diff changeset
97 const Ibyte *nn;
1116
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parents: 988
diff changeset
98 DECLARE_EISTRING (result);
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
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parents: 988
diff changeset
99
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
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parents: 988
diff changeset
100 assert (*name);
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
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parents: 988
diff changeset
101
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
102 /* Sort of check we have a valid filename. */
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
103 if (qxestrpbrk (name, "*?|<>\""))
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
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parents: 988
diff changeset
104 {
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
105 errno = ENOENT;
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
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parents: 988
diff changeset
106 return -1;
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
107 }
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
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parents: 988
diff changeset
108 else if (qxestrlen (name) >= PATH_MAX)
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
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parents: 988
diff changeset
109 {
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
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parents: 988
diff changeset
110 errno = ENAMETOOLONG;
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
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parents: 988
diff changeset
111 return -1;
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
112 }
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
113
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
114 /* Find start of filename */
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
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parents: 988
diff changeset
115 lastname = name + qxestrlen (name);
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
116 while (lastname > name && !IS_DIRECTORY_SEP (lastname[-1]))
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
117 --lastname;
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
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parents: 988
diff changeset
118
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
119 /* Count slashes in unc path */
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
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diff changeset
120 if (abs_start (name) == 2)
1204
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michaels
parents: 1116
diff changeset
121 for (nn = name; *nn; nn++)
e22b0213b713 [xemacs-hg @ 2003-01-12 11:07:58 by michaels]
michaels
parents: 1116
diff changeset
122 if (IS_DIRECTORY_SEP (*nn))
1116
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
123 count++;
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
124
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
125 if (count >= 2 && count < 4)
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
126 {
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
127 eicpy_rawz (result, lastname);
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
128 eilwr (result);
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
129 }
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
130 else
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
131 {
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
132 WIN32_FIND_DATAW find_data;
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
133 Extbyte *nameext;
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
134 HANDLE dir_handle;
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
135
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
136 C_STRING_TO_TSTR (name, nameext);
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
137 dir_handle = qxeFindFirstFile (nameext, &find_data);
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
138 if (dir_handle == INVALID_HANDLE_VALUE)
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
139 {
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
140 errno = ENOENT;
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
141 return -1;
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
142 }
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
143 eicpy_ext (result, (Extbyte *) find_data.cFileName, Qmswindows_tstr);
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
144 FindClose (dir_handle);
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
145 }
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
146
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
147 if ((len = eilen (result)) < size)
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
148 {
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
149 DECLARE_EISTRING (eilastname);
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
150
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
151 eicpy_rawz (eilastname, lastname);
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
152 if (eicmp_ei (eilastname, result) == 0)
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
153 /* Signal that the name is already OK. */
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
154 err = EINVAL;
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
155 else
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
156 memcpy (buf, eidata (result), len + 1);
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
157 }
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
158 else
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
159 err = ENAMETOOLONG;
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
160
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
161 errno = err;
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
162 return err ? -1 : len;
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
163 }
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
164 #endif /* WIN32_ANY */
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
165 }
446
1ccc32a20af4 Import from CVS: tag r21-2-38
cvs
parents: 442
diff changeset
166
771
943eaba38521 [xemacs-hg @ 2002-03-13 08:51:24 by ben]
ben
parents: 593
diff changeset
167 /* Mule Note: This function works with and returns
943eaba38521 [xemacs-hg @ 2002-03-13 08:51:24 by ben]
ben
parents: 593
diff changeset
168 internally-formatted strings. */
440
8de8e3f6228a Import from CVS: tag r21-2-28
cvs
parents: 428
diff changeset
169
867
804517e16990 [xemacs-hg @ 2002-06-05 09:54:39 by ben]
ben
parents: 851
diff changeset
170 Ibyte *
804517e16990 [xemacs-hg @ 2002-06-05 09:54:39 by ben]
ben
parents: 851
diff changeset
171 qxe_realpath (const Ibyte *path, Ibyte *resolved_path)
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
172 {
867
804517e16990 [xemacs-hg @ 2002-06-05 09:54:39 by ben]
ben
parents: 851
diff changeset
173 Ibyte copy_path[PATH_MAX];
804517e16990 [xemacs-hg @ 2002-06-05 09:54:39 by ben]
ben
parents: 851
diff changeset
174 Ibyte *new_path = resolved_path;
804517e16990 [xemacs-hg @ 2002-06-05 09:54:39 by ben]
ben
parents: 851
diff changeset
175 Ibyte *max_path;
1116
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
176 #if defined (HAVE_READLINK) || defined (WIN32_ANY)
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
177 int readlinks = 0;
867
804517e16990 [xemacs-hg @ 2002-06-05 09:54:39 by ben]
ben
parents: 851
diff changeset
178 Ibyte link_path[PATH_MAX];
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
179 int n;
1116
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
180 int abslen = abs_start (path);
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
181 #endif
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
182
1760
0240ff815597 [xemacs-hg @ 2003-10-22 14:16:58 by james]
james
parents: 1204
diff changeset
183 restart:
0240ff815597 [xemacs-hg @ 2003-10-22 14:16:58 by james]
james
parents: 1204
diff changeset
184
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
185 /* Make a copy of the source path since we may need to modify it. */
771
943eaba38521 [xemacs-hg @ 2002-03-13 08:51:24 by ben]
ben
parents: 593
diff changeset
186 qxestrcpy (copy_path, path);
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
187 path = copy_path;
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
188 max_path = copy_path + PATH_MAX - 2;
446
1ccc32a20af4 Import from CVS: tag r21-2-38
cvs
parents: 442
diff changeset
189
819
6504113e7c2d [xemacs-hg @ 2002-04-25 18:03:23 by andyp]
andyp
parents: 771
diff changeset
190 if (0)
6504113e7c2d [xemacs-hg @ 2002-04-25 18:03:23 by andyp]
andyp
parents: 771
diff changeset
191 ;
1116
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
192 #ifdef WIN32_ANY
446
1ccc32a20af4 Import from CVS: tag r21-2-38
cvs
parents: 442
diff changeset
193 /* Check for c:/... or //server/... */
988
5df795348f45 [xemacs-hg @ 2002-09-01 22:13:52 by andyp]
andyp
parents: 867
diff changeset
194 else if (abslen == 3 || abslen == 2)
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
195 {
462
0784d089fdc9 Import from CVS: tag r21-2-46
cvs
parents: 446
diff changeset
196 /* Make sure drive letter is lowercased. */
1116
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
197 if (abslen == 3)
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
198 {
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
199 *new_path = tolower (*path);
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
200 new_path++;
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
201 path++;
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
202 abslen--;
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
203 }
988
5df795348f45 [xemacs-hg @ 2002-09-01 22:13:52 by andyp]
andyp
parents: 867
diff changeset
204 /* Coerce directory chars. */
1116
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
205 while (abslen-- > 0)
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
206 {
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
207 if (IS_DIRECTORY_SEP (*path))
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
208 *new_path++ = DIRECTORY_SEP;
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
209 else
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
210 *new_path++ = *path;
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
211 path++;
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
212 }
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
213 }
819
6504113e7c2d [xemacs-hg @ 2002-04-25 18:03:23 by andyp]
andyp
parents: 771
diff changeset
214 #endif
6504113e7c2d [xemacs-hg @ 2002-04-25 18:03:23 by andyp]
andyp
parents: 771
diff changeset
215 #ifdef WIN32_NATIVE
446
1ccc32a20af4 Import from CVS: tag r21-2-38
cvs
parents: 442
diff changeset
216 /* No drive letter, but a beginning slash? Prepend drive letter. */
1ccc32a20af4 Import from CVS: tag r21-2-38
cvs
parents: 442
diff changeset
217 else if (abslen == 1)
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
218 {
771
943eaba38521 [xemacs-hg @ 2002-03-13 08:51:24 by ben]
ben
parents: 593
diff changeset
219 get_initial_directory (new_path, PATH_MAX - 1);
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
220 new_path += 3;
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
221 path++;
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
222 }
446
1ccc32a20af4 Import from CVS: tag r21-2-38
cvs
parents: 442
diff changeset
223 /* Just a path name, prepend the current directory */
1116
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
224 else
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
225 {
771
943eaba38521 [xemacs-hg @ 2002-03-13 08:51:24 by ben]
ben
parents: 593
diff changeset
226 get_initial_directory (new_path, PATH_MAX - 1);
943eaba38521 [xemacs-hg @ 2002-03-13 08:51:24 by ben]
ben
parents: 593
diff changeset
227 new_path += qxestrlen (new_path);
446
1ccc32a20af4 Import from CVS: tag r21-2-38
cvs
parents: 442
diff changeset
228 if (!IS_DIRECTORY_SEP (new_path[-1]))
1ccc32a20af4 Import from CVS: tag r21-2-38
cvs
parents: 442
diff changeset
229 *new_path++ = DIRECTORY_SEP;
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
230 }
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
231 #else
771
943eaba38521 [xemacs-hg @ 2002-03-13 08:51:24 by ben]
ben
parents: 593
diff changeset
232 /* If it's a relative pathname use get_initial_directory for starters. */
819
6504113e7c2d [xemacs-hg @ 2002-04-25 18:03:23 by andyp]
andyp
parents: 771
diff changeset
233 else if (abslen == 0)
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
234 {
771
943eaba38521 [xemacs-hg @ 2002-03-13 08:51:24 by ben]
ben
parents: 593
diff changeset
235 get_initial_directory (new_path, PATH_MAX - 1);
943eaba38521 [xemacs-hg @ 2002-03-13 08:51:24 by ben]
ben
parents: 593
diff changeset
236 new_path += qxestrlen (new_path);
446
1ccc32a20af4 Import from CVS: tag r21-2-38
cvs
parents: 442
diff changeset
237 if (!IS_DIRECTORY_SEP (new_path[-1]))
1ccc32a20af4 Import from CVS: tag r21-2-38
cvs
parents: 442
diff changeset
238 *new_path++ = DIRECTORY_SEP;
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
239 }
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
240 else
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
241 {
446
1ccc32a20af4 Import from CVS: tag r21-2-38
cvs
parents: 442
diff changeset
242 /* Copy first directory sep. May have two on cygwin. */
771
943eaba38521 [xemacs-hg @ 2002-03-13 08:51:24 by ben]
ben
parents: 593
diff changeset
243 qxestrncpy (new_path, path, abslen);
446
1ccc32a20af4 Import from CVS: tag r21-2-38
cvs
parents: 442
diff changeset
244 new_path += abslen;
1ccc32a20af4 Import from CVS: tag r21-2-38
cvs
parents: 442
diff changeset
245 path += abslen;
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
246 }
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
247 #endif
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
248 /* Expand each slash-separated pathname component. */
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
249 while (*path != '\0')
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
250 {
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
251 /* Ignore stray "/". */
446
1ccc32a20af4 Import from CVS: tag r21-2-38
cvs
parents: 442
diff changeset
252 if (IS_DIRECTORY_SEP (*path))
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
253 {
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
254 path++;
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
255 continue;
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
256 }
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
257
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
258 if (*path == '.')
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
259 {
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
260 /* Ignore ".". */
446
1ccc32a20af4 Import from CVS: tag r21-2-38
cvs
parents: 442
diff changeset
261 if (path[1] == '\0' || IS_DIRECTORY_SEP (path[1]))
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
262 {
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
263 path++;
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
264 continue;
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
265 }
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
266
442
abe6d1db359e Import from CVS: tag r21-2-36
cvs
parents: 440
diff changeset
267 /* Handle ".." */
abe6d1db359e Import from CVS: tag r21-2-36
cvs
parents: 440
diff changeset
268 if (path[1] == '.' &&
446
1ccc32a20af4 Import from CVS: tag r21-2-38
cvs
parents: 442
diff changeset
269 (path[2] == '\0' || IS_DIRECTORY_SEP (path[2])))
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
270 {
442
abe6d1db359e Import from CVS: tag r21-2-36
cvs
parents: 440
diff changeset
271 path += 2;
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
272
442
abe6d1db359e Import from CVS: tag r21-2-36
cvs
parents: 440
diff changeset
273 /* Ignore ".." at root. */
1116
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
274 if (new_path == resolved_path + abs_start (resolved_path))
442
abe6d1db359e Import from CVS: tag r21-2-36
cvs
parents: 440
diff changeset
275 continue;
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
276
442
abe6d1db359e Import from CVS: tag r21-2-36
cvs
parents: 440
diff changeset
277 /* Handle ".." by backing up. */
446
1ccc32a20af4 Import from CVS: tag r21-2-38
cvs
parents: 442
diff changeset
278 --new_path;
1ccc32a20af4 Import from CVS: tag r21-2-38
cvs
parents: 442
diff changeset
279 while (!IS_DIRECTORY_SEP (new_path[-1]))
1ccc32a20af4 Import from CVS: tag r21-2-38
cvs
parents: 442
diff changeset
280 --new_path;
442
abe6d1db359e Import from CVS: tag r21-2-36
cvs
parents: 440
diff changeset
281 continue;
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
282 }
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
283 }
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
284
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
285 /* Safely copy the next pathname component. */
446
1ccc32a20af4 Import from CVS: tag r21-2-38
cvs
parents: 442
diff changeset
286 while (*path != '\0' && !IS_DIRECTORY_SEP (*path))
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
287 {
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
288 if (path > max_path)
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
289 {
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
290 errno = ENAMETOOLONG;
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
291 return NULL;
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
292 }
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
293 *new_path++ = *path++;
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
294 }
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
295
1116
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
296 #if defined (HAVE_READLINK) || defined (WIN32_ANY)
771
943eaba38521 [xemacs-hg @ 2002-03-13 08:51:24 by ben]
ben
parents: 593
diff changeset
297 /* See if latest pathname component is a symlink or needs case
943eaba38521 [xemacs-hg @ 2002-03-13 08:51:24 by ben]
ben
parents: 593
diff changeset
298 correction. */
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
299 *new_path = '\0';
771
943eaba38521 [xemacs-hg @ 2002-03-13 08:51:24 by ben]
ben
parents: 593
diff changeset
300 n = readlink_and_correct_case (resolved_path, link_path, PATH_MAX - 1);
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
301
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
302 if (n < 0)
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
303 {
771
943eaba38521 [xemacs-hg @ 2002-03-13 08:51:24 by ben]
ben
parents: 593
diff changeset
304 /* EINVAL means the file exists but isn't a symlink or doesn't
943eaba38521 [xemacs-hg @ 2002-03-13 08:51:24 by ben]
ben
parents: 593
diff changeset
305 need case correction. */
1116
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
306 #ifdef WIN32_ANY
462
0784d089fdc9 Import from CVS: tag r21-2-46
cvs
parents: 446
diff changeset
307 if (errno != EINVAL && errno != ENOENT)
0784d089fdc9 Import from CVS: tag r21-2-46
cvs
parents: 446
diff changeset
308 #else
0784d089fdc9 Import from CVS: tag r21-2-46
cvs
parents: 446
diff changeset
309 if (errno != EINVAL)
0784d089fdc9 Import from CVS: tag r21-2-46
cvs
parents: 446
diff changeset
310 #endif
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
311 return NULL;
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
312 }
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
313 else
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
314 {
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
315 /* Protect against infinite loops. */
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
316 if (readlinks++ > MAX_READLINKS)
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
317 {
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
318 errno = ELOOP;
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
319 return NULL;
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
320 }
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
321
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
322 /* Note: readlink doesn't add the null byte. */
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
323 link_path[n] = '\0';
446
1ccc32a20af4 Import from CVS: tag r21-2-38
cvs
parents: 442
diff changeset
324
1760
0240ff815597 [xemacs-hg @ 2003-10-22 14:16:58 by james]
james
parents: 1204
diff changeset
325 abslen = abs_start (link_path);
0240ff815597 [xemacs-hg @ 2003-10-22 14:16:58 by james]
james
parents: 1204
diff changeset
326 if (abslen > 0)
0240ff815597 [xemacs-hg @ 2003-10-22 14:16:58 by james]
james
parents: 1204
diff changeset
327 {
0240ff815597 [xemacs-hg @ 2003-10-22 14:16:58 by james]
james
parents: 1204
diff changeset
328 /* Start over for an absolute symlink. */
0240ff815597 [xemacs-hg @ 2003-10-22 14:16:58 by james]
james
parents: 1204
diff changeset
329 new_path = resolved_path;
0240ff815597 [xemacs-hg @ 2003-10-22 14:16:58 by james]
james
parents: 1204
diff changeset
330 qxestrcat (link_path, path);
0240ff815597 [xemacs-hg @ 2003-10-22 14:16:58 by james]
james
parents: 1204
diff changeset
331 path = link_path;
0240ff815597 [xemacs-hg @ 2003-10-22 14:16:58 by james]
james
parents: 1204
diff changeset
332 goto restart;
0240ff815597 [xemacs-hg @ 2003-10-22 14:16:58 by james]
james
parents: 1204
diff changeset
333 }
0240ff815597 [xemacs-hg @ 2003-10-22 14:16:58 by james]
james
parents: 1204
diff changeset
334
0240ff815597 [xemacs-hg @ 2003-10-22 14:16:58 by james]
james
parents: 1204
diff changeset
335 /* Otherwise back up over this component. */
0240ff815597 [xemacs-hg @ 2003-10-22 14:16:58 by james]
james
parents: 1204
diff changeset
336 for (--new_path; !IS_DIRECTORY_SEP (*new_path); --new_path)
0240ff815597 [xemacs-hg @ 2003-10-22 14:16:58 by james]
james
parents: 1204
diff changeset
337 assert (new_path > resolved_path);
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
338
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
339 /* Safe sex check. */
771
943eaba38521 [xemacs-hg @ 2002-03-13 08:51:24 by ben]
ben
parents: 593
diff changeset
340 if (qxestrlen (path) + n >= PATH_MAX)
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
341 {
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
342 errno = ENAMETOOLONG;
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
343 return NULL;
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
344 }
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
345
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
346 /* Insert symlink contents into path. */
771
943eaba38521 [xemacs-hg @ 2002-03-13 08:51:24 by ben]
ben
parents: 593
diff changeset
347 qxestrcat (link_path, path);
943eaba38521 [xemacs-hg @ 2002-03-13 08:51:24 by ben]
ben
parents: 593
diff changeset
348 qxestrcpy (copy_path, link_path);
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
349 path = copy_path;
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
350 }
1116
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
351 #endif /* HAVE_READLINK || WIN32_ANY */
446
1ccc32a20af4 Import from CVS: tag r21-2-38
cvs
parents: 442
diff changeset
352 *new_path++ = DIRECTORY_SEP;
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
353 }
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
354
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
355 /* Delete trailing slash but don't whomp a lone slash. */
1116
3bcd77d0bf93 [xemacs-hg @ 2002-11-22 12:57:09 by ben]
ben
parents: 988
diff changeset
356 if (new_path != resolved_path + abs_start (resolved_path) &&
771
943eaba38521 [xemacs-hg @ 2002-03-13 08:51:24 by ben]
ben
parents: 593
diff changeset
357 IS_DIRECTORY_SEP (new_path[-1]))
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
358 new_path--;
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
359
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
360 /* Make sure it's null terminated. */
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
361 *new_path = '\0';
446
1ccc32a20af4 Import from CVS: tag r21-2-38
cvs
parents: 442
diff changeset
362
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
363 return resolved_path;
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
364 }