Mercurial > hg > xemacs-beta
view src/realpath.c @ 4952:19a72041c5ed
Mule-izing, various fixes related to char * arguments
-------------------- ChangeLog entries follow: --------------------
modules/ChangeLog addition:
2010-01-26 Ben Wing <ben@xemacs.org>
* postgresql/postgresql.c:
* postgresql/postgresql.c (CHECK_LIVE_CONNECTION):
* postgresql/postgresql.c (print_pgresult):
* postgresql/postgresql.c (Fpq_conn_defaults):
* postgresql/postgresql.c (Fpq_connectdb):
* postgresql/postgresql.c (Fpq_connect_start):
* postgresql/postgresql.c (Fpq_result_status):
* postgresql/postgresql.c (Fpq_res_status):
Mule-ize large parts of it.
2010-01-26 Ben Wing <ben@xemacs.org>
* ldap/eldap.c (print_ldap):
* ldap/eldap.c (allocate_ldap):
Use write_ascstring().
src/ChangeLog addition:
2010-01-26 Ben Wing <ben@xemacs.org>
* alloc.c:
* alloc.c (build_ascstring):
* alloc.c (build_msg_cistring):
* alloc.c (staticpro_1):
* alloc.c (staticpro_name):
* alloc.c (staticpro_nodump_1):
* alloc.c (staticpro_nodump_name):
* alloc.c (unstaticpro_nodump_1):
* alloc.c (mcpro_1):
* alloc.c (mcpro_name):
* alloc.c (object_memory_usage_stats):
* alloc.c (common_init_alloc_early):
* alloc.c (init_alloc_once_early):
* buffer.c (print_buffer):
* buffer.c (vars_of_buffer):
* buffer.c (common_init_complex_vars_of_buffer):
* buffer.c (init_initial_directory):
* bytecode.c (invalid_byte_code):
* bytecode.c (print_compiled_function):
* bytecode.c (mark_compiled_function):
* chartab.c (print_table_entry):
* chartab.c (print_char_table):
* config.h.in:
* console-gtk.c:
* console-gtk.c (gtk_device_to_console_connection):
* console-gtk.c (gtk_semi_canonicalize_console_connection):
* console-gtk.c (gtk_canonicalize_console_connection):
* console-gtk.c (gtk_semi_canonicalize_device_connection):
* console-gtk.c (gtk_canonicalize_device_connection):
* console-stream.c (stream_init_frame_1):
* console-stream.c (vars_of_console_stream):
* console-stream.c (init_console_stream):
* console-x.c (x_semi_canonicalize_console_connection):
* console-x.c (x_semi_canonicalize_device_connection):
* console-x.c (x_canonicalize_device_connection):
* console-x.h:
* data.c (eq_with_ebola_notice):
* data.c (Fsubr_interactive):
* data.c (Fnumber_to_string):
* data.c (digit_to_number):
* device-gtk.c (gtk_init_device):
* device-msw.c (print_devmode):
* device-x.c (x_event_name):
* dialog-msw.c (handle_directory_dialog_box):
* dialog-msw.c (handle_file_dialog_box):
* dialog-msw.c (vars_of_dialog_mswindows):
* doc.c (weird_doc):
* doc.c (Fsnarf_documentation):
* doc.c (vars_of_doc):
* dumper.c (pdump):
* dynarr.c:
* dynarr.c (Dynarr_realloc):
* editfns.c (Fuser_real_login_name):
* editfns.c (get_home_directory):
* elhash.c (print_hash_table_data):
* elhash.c (print_hash_table):
* emacs.c (main_1):
* emacs.c (vars_of_emacs):
* emodules.c:
* emodules.c (_emodules_list):
* emodules.c (Fload_module):
* emodules.c (Funload_module):
* emodules.c (Flist_modules):
* emodules.c (find_make_module):
* emodules.c (attempt_module_delete):
* emodules.c (emodules_load):
* emodules.c (emodules_doc_subr):
* emodules.c (emodules_doc_sym):
* emodules.c (syms_of_module):
* emodules.c (vars_of_module):
* emodules.h:
* eval.c (print_subr):
* eval.c (signal_call_debugger):
* eval.c (build_error_data):
* eval.c (signal_error):
* eval.c (maybe_signal_error):
* eval.c (signal_continuable_error):
* eval.c (maybe_signal_continuable_error):
* eval.c (signal_error_2):
* eval.c (maybe_signal_error_2):
* eval.c (signal_continuable_error_2):
* eval.c (maybe_signal_continuable_error_2):
* eval.c (signal_ferror):
* eval.c (maybe_signal_ferror):
* eval.c (signal_continuable_ferror):
* eval.c (maybe_signal_continuable_ferror):
* eval.c (signal_ferror_with_frob):
* eval.c (maybe_signal_ferror_with_frob):
* eval.c (signal_continuable_ferror_with_frob):
* eval.c (maybe_signal_continuable_ferror_with_frob):
* eval.c (syntax_error):
* eval.c (syntax_error_2):
* eval.c (maybe_syntax_error):
* eval.c (sferror):
* eval.c (sferror_2):
* eval.c (maybe_sferror):
* eval.c (invalid_argument):
* eval.c (invalid_argument_2):
* eval.c (maybe_invalid_argument):
* eval.c (invalid_constant):
* eval.c (invalid_constant_2):
* eval.c (maybe_invalid_constant):
* eval.c (invalid_operation):
* eval.c (invalid_operation_2):
* eval.c (maybe_invalid_operation):
* eval.c (invalid_change):
* eval.c (invalid_change_2):
* eval.c (maybe_invalid_change):
* eval.c (invalid_state):
* eval.c (invalid_state_2):
* eval.c (maybe_invalid_state):
* eval.c (wtaerror):
* eval.c (stack_overflow):
* eval.c (out_of_memory):
* eval.c (print_multiple_value):
* eval.c (issue_call_trapping_problems_warning):
* eval.c (backtrace_specials):
* eval.c (backtrace_unevalled_args):
* eval.c (Fbacktrace):
* eval.c (warn_when_safe):
* event-Xt.c (modwarn):
* event-Xt.c (modbarf):
* event-Xt.c (check_modifier):
* event-Xt.c (store_modifier):
* event-Xt.c (emacs_Xt_format_magic_event):
* event-Xt.c (describe_event):
* event-gtk.c (dragndrop_data_received):
* event-gtk.c (store_modifier):
* event-gtk.c (gtk_reset_modifier_mapping):
* event-msw.c (dde_eval_string):
* event-msw.c (Fdde_alloc_advise_item):
* event-msw.c (mswindows_dde_callback):
* event-msw.c (FROB):
* event-msw.c (emacs_mswindows_format_magic_event):
* event-stream.c (external_debugging_print_event):
* event-stream.c (execute_help_form):
* event-stream.c (vars_of_event_stream):
* events.c (print_event_1):
* events.c (print_event):
* events.c (event_equal):
* extents.c (print_extent_1):
* extents.c (print_extent):
* extents.c (vars_of_extents):
* faces.c (print_face):
* faces.c (complex_vars_of_faces):
* file-coding.c:
* file-coding.c (print_coding_system):
* file-coding.c (print_coding_system_in_print_method):
* file-coding.c (default_query_method):
* file-coding.c (find_coding_system):
* file-coding.c (make_coding_system_1):
* file-coding.c (chain_print):
* file-coding.c (undecided_print):
* file-coding.c (gzip_print):
* file-coding.c (vars_of_file_coding):
* file-coding.c (complex_vars_of_file_coding):
* fileio.c:
* fileio.c (report_file_type_error):
* fileio.c (report_error_with_errno):
* fileio.c (report_file_error):
* fileio.c (barf_or_query_if_file_exists):
* fileio.c (vars_of_fileio):
* floatfns.c (matherr):
* fns.c (print_bit_vector):
* fns.c (Fmapconcat):
* fns.c (add_suffix_to_symbol):
* fns.c (add_prefix_to_symbol):
* frame-gtk.c:
* frame-gtk.c (Fgtk_window_id):
* frame-x.c (def):
* frame-x.c (x_cde_transfer_callback):
* frame.c:
* frame.c (Fmake_frame):
* gc.c (show_gc_cursor_and_message):
* gc.c (vars_of_gc):
* glyphs-eimage.c (png_instantiate):
* glyphs-eimage.c (tiff_instantiate):
* glyphs-gtk.c (gtk_print_image_instance):
* glyphs-msw.c (mswindows_print_image_instance):
* glyphs-x.c (x_print_image_instance):
* glyphs-x.c (update_widget_face):
* glyphs.c (make_string_from_file):
* glyphs.c (print_image_instance):
* glyphs.c (signal_image_error):
* glyphs.c (signal_image_error_2):
* glyphs.c (signal_double_image_error):
* glyphs.c (signal_double_image_error_2):
* glyphs.c (xbm_mask_file_munging):
* glyphs.c (pixmap_to_lisp_data):
* glyphs.h:
* gui.c (gui_item_display_flush_left):
* hpplay.c (player_error_internal):
* hpplay.c (myHandler):
* intl-win32.c:
* intl-win32.c (langcode_to_lang):
* intl-win32.c (sublangcode_to_lang):
* intl-win32.c (Fmswindows_get_locale_info):
* intl-win32.c (lcid_to_locale_mule_or_no):
* intl-win32.c (mswindows_multibyte_to_unicode_print):
* intl-win32.c (complex_vars_of_intl_win32):
* keymap.c:
* keymap.c (print_keymap):
* keymap.c (ensure_meta_prefix_char_keymapp):
* keymap.c (Fkey_description):
* keymap.c (Ftext_char_description):
* lisp.h:
* lisp.h (struct):
* lisp.h (DECLARE_INLINE_HEADER):
* lread.c (Fload_internal):
* lread.c (locate_file):
* lread.c (read_escape):
* lread.c (read_raw_string):
* lread.c (read1):
* lread.c (read_list):
* lread.c (read_compiled_function):
* lread.c (init_lread):
* lrecord.h:
* marker.c (print_marker):
* marker.c (marker_equal):
* menubar-msw.c (displayable_menu_item):
* menubar-x.c (command_builder_operate_menu_accelerator):
* menubar.c (vars_of_menubar):
* minibuf.c (reinit_complex_vars_of_minibuf):
* minibuf.c (complex_vars_of_minibuf):
* mule-charset.c (Fmake_charset):
* mule-charset.c (complex_vars_of_mule_charset):
* mule-coding.c (iso2022_print):
* mule-coding.c (fixed_width_query):
* number.c (bignum_print):
* number.c (ratio_print):
* number.c (bigfloat_print):
* number.c (bigfloat_finalize):
* objects-msw.c:
* objects-msw.c (mswindows_color_to_string):
* objects-msw.c (mswindows_color_list):
* objects-tty.c:
* objects-tty.c (tty_font_list):
* objects-tty.c (tty_find_charset_font):
* objects-xlike-inc.c (xft_find_charset_font):
* objects-xlike-inc.c (endif):
* print.c:
* print.c (write_istring):
* print.c (write_ascstring):
* print.c (Fterpri):
* print.c (Fprint):
* print.c (print_error_message):
* print.c (print_vector_internal):
* print.c (print_cons):
* print.c (print_string):
* print.c (printing_unreadable_object):
* print.c (print_internal):
* print.c (print_float):
* print.c (print_symbol):
* process-nt.c (mswindows_report_winsock_error):
* process-nt.c (nt_canonicalize_host_name):
* process-unix.c (unix_canonicalize_host_name):
* process.c (print_process):
* process.c (report_process_error):
* process.c (report_network_error):
* process.c (make_process_internal):
* process.c (Fstart_process_internal):
* process.c (status_message):
* process.c (putenv_internal):
* process.c (vars_of_process):
* process.h:
* profile.c (vars_of_profile):
* rangetab.c (print_range_table):
* realpath.c (vars_of_realpath):
* redisplay.c (vars_of_redisplay):
* search.c (wordify):
* search.c (Freplace_match):
* sheap.c (sheap_adjust_h):
* sound.c (report_sound_error):
* sound.c (Fplay_sound_file):
* specifier.c (print_specifier):
* symbols.c (Fsubr_name):
* symbols.c (do_symval_forwarding):
* symbols.c (set_default_buffer_slot_variable):
* symbols.c (set_default_console_slot_variable):
* symbols.c (store_symval_forwarding):
* symbols.c (default_value):
* symbols.c (defsymbol_massage_name_1):
* symbols.c (defsymbol_massage_name_nodump):
* symbols.c (defsymbol_massage_name):
* symbols.c (defsymbol_massage_multiword_predicate_nodump):
* symbols.c (defsymbol_massage_multiword_predicate):
* symbols.c (defsymbol_nodump):
* symbols.c (defsymbol):
* symbols.c (defkeyword):
* symbols.c (defkeyword_massage_name):
* symbols.c (check_module_subr):
* symbols.c (deferror_1):
* symbols.c (deferror):
* symbols.c (deferror_massage_name):
* symbols.c (deferror_massage_name_and_message):
* symbols.c (defvar_magic):
* symeval.h:
* symeval.h (DEFVAR_SYMVAL_FWD):
* sysdep.c:
* sysdep.c (init_system_name):
* sysdll.c:
* sysdll.c (MAYBE_PREPEND_UNDERSCORE):
* sysdll.c (dll_function):
* sysdll.c (dll_variable):
* sysdll.c (dll_error):
* sysdll.c (dll_open):
* sysdll.c (dll_close):
* sysdll.c (image_for_address):
* sysdll.c (my_find_image):
* sysdll.c (search_linked_libs):
* sysdll.h:
* sysfile.h:
* sysfile.h (DEFAULT_DIRECTORY_FALLBACK):
* syswindows.h:
* tests.c (DFC_CHECK_LENGTH):
* tests.c (DFC_CHECK_CONTENT):
* tests.c (Ftest_hash_tables):
* text.c (vars_of_text):
* text.h:
* tooltalk.c (tt_opnum_string):
* tooltalk.c (tt_message_arg_ival_string):
* tooltalk.c (Ftooltalk_default_procid):
* tooltalk.c (Ftooltalk_default_session):
* tooltalk.c (init_tooltalk):
* tooltalk.c (vars_of_tooltalk):
* ui-gtk.c (Fdll_load):
* ui-gtk.c (type_to_marshaller_type):
* ui-gtk.c (Fgtk_import_function_internal):
* ui-gtk.c (emacs_gtk_object_printer):
* ui-gtk.c (emacs_gtk_boxed_printer):
* unicode.c (unicode_to_ichar):
* unicode.c (unicode_print):
* unicode.c (unicode_query):
* unicode.c (vars_of_unicode):
* unicode.c (complex_vars_of_unicode):
* win32.c:
* win32.c (mswindows_report_process_error):
* window.c (print_window):
* xemacs.def.in.in:
BASIC IDEA: Further fixing up uses of char * and CIbyte *
to reflect their actual semantics; Mule-izing some code;
redoing of the not-yet-working code to handle message translation.
Clean up code to handle message-translation (not yet working).
Create separate versions of build_msg_string() for working with
Ibyte *, CIbyte *, and Ascbyte * arguments. Assert that Ascbyte *
arguments are pure-ASCII. Make build_msg_string() be the same
as build_msg_ascstring(). Create same three versions of GETTEXT()
and DEFER_GETTEXT(). Also create build_defer_string() and
variants for the equivalent of DEFER_GETTEXT() when building a
string. Remove old CGETTEXT(). Clean up code where GETTEXT(),
DEFER_GETTEXT(), build_msg_string(), etc. was being called and
introduce some new calls to build_msg_string(), etc. Remove
GETTEXT() from calls to weird_doc() -- we assume that the
message snarfer knows about weird_doc(). Remove uses of
DEFER_GETTEXT() from error messages in sysdep.c and instead use
special comments /* @@@begin-snarf@@@ */ and /* @@@end-snarf@@@ */
that the message snarfer presumably knows about.
Create build_ascstring() and use it in many instances in place
of build_string(). The purpose of having Ascbyte * variants is
to make the code more self-documenting in terms of what sort of
semantics is expected for char * strings. In fact in the process
of looking for uses of build_string(), much improperly Mule-ized
was discovered.
Mule-ize a lot of code as described in previous paragraph,
e.g. in sysdep.c.
Make the error functions take Ascbyte * strings and fix up a
couple of places where non-pure-ASCII strings were being passed in
(file-coding.c, mule-coding.c, unicode.c). (It's debatable whether
we really need to make the error functions work this way. It
helps catch places where code is written in a way that message
translation won't work, but we may well never implement message
translation.)
Make staticpro() and friends take Ascbyte * strings instead of
raw char * strings. Create a const_Ascbyte_ptr dynarr type
to describe what's held by staticpro_names[] and friends,
create pdump descriptions for const_Ascbyte_ptr dynarrs, and
use them in place of specially-crafted staticpro descriptions.
Mule-ize certain other functions (e.g. x_event_name) by correcting
raw use of char * to Ascbyte *, Rawbyte * or another such type,
and raw use of char[] buffers to another type (usually Ascbyte[]).
Change many uses of write_c_string() to write_msg_string(),
write_ascstring(), etc.
Mule-ize emodules.c, emodules.h, sysdll.h.
Fix some un-Mule-ized code in intl-win32.c.
A comment in event-Xt.c and the limitations of the message
snarfer (make-msgfile or whatever) is presumably incorrect --
it should be smart enough to handle function calls spread over
more than one line. Clean up code in event-Xt.c that was
written awkwardly for this reason.
In config.h.in, instead of NEED_ERROR_CHECK_TYPES_INLINES,
create a more general XEMACS_DEFS_NEEDS_INLINE_DECLS to
indicate when inlined functions need to be declared in
xemacs.defs.in.in, and make use of it in xemacs.defs.in.in.
We need to do this because postgresql.c now calls qxestrdup(),
which is an inline function.
Make nconc2() and other such functions MODULE_API and put
them in xemacs.defs.in.in since postgresql.c now uses them.
Clean up indentation in lread.c and a few other places.
In text.h, document ASSERT_ASCTEXT_ASCII() and
ASSERT_ASCTEXT_ASCII_LEN(), group together the stand-in
encodings and add some more for DLL symbols, function and
variable names, etc.
| author | Ben Wing <ben@xemacs.org> |
|---|---|
| date | Tue, 26 Jan 2010 23:22:30 -0600 |
| parents | b3ea9c582280 |
| children | 16112448d484 4aebb0131297 |
line wrap: on
line source
/* * realpath.c -- canonicalize pathname by removing symlinks * Copyright (C) 1993 Rick Sladkey <jrs@world.std.com> * Copyright (C) 2001, 2002, 2004 Ben Wing. * This file is part of XEmacs. XEmacs is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. XEmacs is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with XEmacs; see the file COPYING. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* Synched up with: Not in FSF. */ /* This file has been Mule-ized, June 2001 by Ben Wing. Everything in this file now works in terms of internal, not external, data. This is the only way to be safe, and it makes the code cleaner. */ #include <config.h> #include "lisp.h" #include "profile.h" #include "sysfile.h" #include "sysdir.h" #define MAX_READLINKS 32 #ifdef WIN32_ANY #include "syswindows.h" #ifndef ELOOP #define ELOOP 10062 /* = WSAELOOP in winsock.h */ #endif #endif Lisp_Object QSin_qxe_realpath; /* Length of start of absolute filename. */ static int abs_start (const Ibyte *name) { #ifdef WIN32_ANY if (isalpha (*name) && IS_DEVICE_SEP (name[1]) && IS_DIRECTORY_SEP (name[2])) return 3; else if (IS_DIRECTORY_SEP (*name)) return IS_DIRECTORY_SEP (name[1]) ? 2 : 1; else return 0; #else /* not WIN32_ANY */ return IS_DIRECTORY_SEP (*name) ? 1 : 0; #endif } /* Find real name of a file by resolving symbolic links and/or shortcuts under Windows (.LNK links), if such support is enabled. If no link found, and LINKS_ONLY is false, look up the correct case in the file system of the last component. Under Windows, UNC servers and shares are lower-cased. Directories must be given without trailing '/'. One day, this could read Win2K's reparse points. Returns length of characters copied info BUF. DOES NOT ZERO TERMINATE!!!!! */ #ifdef REALPATH_CORRECTS_CASE /* Darwin */ #include <sys/param.h> #include <stdlib.h> #endif static int readlink_or_correct_case (const Ibyte *name, Ibyte *buf, Bytecount size, #ifndef WIN32_ANY Boolint UNUSED (links_only) #else Boolint links_only #endif ) { #ifndef WIN32_ANY #ifdef REALPATH_CORRECTS_CASE /* Darwin's realpath corrects file name case, so we want to use that here, as well as our own, non-case-correcting, implementation further down in this file. It might be reasonable to incorporate case correction in our own realpath implementation, which would help things with case-insensitive file systems on Linux; one way to do this would be to make sure that init_initial_directory and get_initial_directory always give the correct case. */ int n = qxe_readlink (name, buf, (size_t) size); Extbyte realpath_buf[PATH_MAX], *tmp; DECLARE_EISTRING (realpathing); if (n >= 0 || errno != EINVAL) return n; eicpy_rawz (realpathing, name); eito_external (realpathing, Qfile_name); tmp = realpath (eiextdata (realpathing), realpath_buf); if (!tmp) return -1; if (0 == memcmp (eiextdata (realpathing), realpath_buf, eiextlen (realpathing))) { /* No case change needed; tell the caller that. */ errno = EINVAL; return -1; } eireset (realpathing); eicpy_ext (realpathing, realpath_buf, Qfile_name); if (eilen (realpathing) > size) { errno = ERANGE; return -1; } memcpy (buf, eidata (realpathing), eilen (realpathing)); return eilen (realpathing); #else /* !REALPATH_CORRECTS_CASE */ return qxe_readlink (name, buf, (size_t) size); #endif /* REALPATH_CORRECTS_CASE */ #else /* defined (WIN32_ANY) */ # ifdef CYGWIN int n = qxe_readlink (name, buf, (size_t) size); if (n >= 0 || errno != EINVAL) return n; /* The file may exist, but isn't a symlink. Try to find the right name. */ LOCAL_FILE_FORMAT_TO_INTERNAL_MSWIN (name, name); # else if (mswindows_shortcuts_are_symlinks) { Ibyte *tmp = mswindows_read_link (name); if (tmp != NULL) { /* Fucking fixed buffers. */ Bytecount len = qxestrlen (tmp); if (len > size) { errno = ENAMETOOLONG; return -1; } memcpy (buf, tmp, len); xfree (tmp, Ibyte *); return len; } } # endif if (links_only) { errno = EINVAL; return -1; } { int len = 0; int err = 0; const Ibyte *lastname; int count = 0; const Ibyte *nn; DECLARE_EISTRING (result); assert (*name); /* Sort of check we have a valid filename. */ if (qxestrpbrk (name, "*?|<>\"")) { errno = ENOENT; return -1; } else if (qxestrlen (name) >= PATH_MAX_INTERNAL) { errno = ENAMETOOLONG; return -1; } /* Find start of filename */ lastname = name + qxestrlen (name); while (lastname > name && !IS_DIRECTORY_SEP (lastname[-1])) --lastname; /* Count slashes in unc path */ if (abs_start (name) == 2) for (nn = name; *nn; nn++) if (IS_DIRECTORY_SEP (*nn)) count++; if (count >= 2 && count < 4) { eicpy_rawz (result, lastname); eilwr (result); } else { WIN32_FIND_DATAW find_data; Extbyte *nameext; HANDLE dir_handle; C_STRING_TO_TSTR (name, nameext); dir_handle = qxeFindFirstFile (nameext, &find_data); if (dir_handle == INVALID_HANDLE_VALUE) { errno = ENOENT; return -1; } eicpy_ext (result, (Extbyte *) find_data.cFileName, Qmswindows_tstr); FindClose (dir_handle); } if ((len = eilen (result)) <= size) { DECLARE_EISTRING (eilastname); eicpy_rawz (eilastname, lastname); if (eicmp_ei (eilastname, result) == 0) /* Signal that the name is already OK. */ err = EINVAL; else memcpy (buf, eidata (result), len); } else err = ENAMETOOLONG; errno = err; return err ? -1 : len; } #endif /* WIN32_ANY */ } /* Mule Note: This function works with and returns internally-formatted strings. if LINKS_ONLY is true, don't do case canonicalization under Windows. */ Ibyte * qxe_realpath (const Ibyte *path, Ibyte *resolved_path, Boolint links_only) { Ibyte copy_path[PATH_MAX_INTERNAL]; Ibyte *new_path = resolved_path; Ibyte *max_path; Ibyte *retval = NULL; #if defined (HAVE_READLINK) || defined (WIN32_ANY) int readlinks = 0; Ibyte link_path[PATH_MAX_INTERNAL]; int n; int abslen = abs_start (path); #endif PROFILE_DECLARE (); PROFILE_RECORD_ENTERING_SECTION (QSin_qxe_realpath); restart: /* Make a copy of the source path since we may need to modify it. */ qxestrcpy (copy_path, path); path = copy_path; max_path = copy_path + PATH_MAX_INTERNAL - 2; if (0) ; #ifdef WIN32_ANY /* Check for c:/... or //server/... */ else if (abslen == 3 || abslen == 2) { /* Make sure drive letter is lowercased. */ if (abslen == 3) { *new_path = tolower (*path); new_path++; path++; abslen--; } /* Coerce directory chars. */ while (abslen-- > 0) { if (IS_DIRECTORY_SEP (*path)) *new_path++ = DIRECTORY_SEP; else *new_path++ = *path; path++; } } #endif #ifdef WIN32_NATIVE /* No drive letter, but a beginning slash? Prepend drive letter. */ else if (abslen == 1) { get_initial_directory (new_path, PATH_MAX_INTERNAL - 1); new_path += 3; path++; } /* Just a path name, prepend the current directory */ else { get_initial_directory (new_path, PATH_MAX_INTERNAL - 1); new_path += qxestrlen (new_path); if (!IS_DIRECTORY_SEP (new_path[-1])) *new_path++ = DIRECTORY_SEP; } #else /* If it's a relative pathname use get_initial_directory for starters. */ else if (abslen == 0) { get_initial_directory (new_path, PATH_MAX_INTERNAL - 1); new_path += qxestrlen (new_path); if (!IS_DIRECTORY_SEP (new_path[-1])) *new_path++ = DIRECTORY_SEP; } else { /* Copy first directory sep. May have two on cygwin. */ qxestrncpy (new_path, path, abslen); new_path += abslen; path += abslen; } #endif /* Expand each slash-separated pathname component. */ while (*path != '\0') { /* Ignore stray "/". */ if (IS_DIRECTORY_SEP (*path)) { path++; continue; } if (*path == '.') { /* Ignore ".". */ if (path[1] == '\0' || IS_DIRECTORY_SEP (path[1])) { path++; continue; } /* Handle ".." */ if (path[1] == '.' && (path[2] == '\0' || IS_DIRECTORY_SEP (path[2]))) { path += 2; /* Ignore ".." at root. */ if (new_path == resolved_path + abs_start (resolved_path)) continue; /* Handle ".." by backing up. */ --new_path; while (!IS_DIRECTORY_SEP (new_path[-1])) --new_path; continue; } } /* Safely copy the next pathname component. */ while (*path != '\0' && !IS_DIRECTORY_SEP (*path)) { if (path > max_path) { errno = ENAMETOOLONG; goto done; } *new_path++ = *path++; } #if defined (HAVE_READLINK) || defined (WIN32_ANY) /* See if latest pathname component is a symlink or needs case correction. */ *new_path = '\0'; n = readlink_or_correct_case (resolved_path, link_path, PATH_MAX_INTERNAL - 1, links_only); if (n < 0) { /* EINVAL means the file exists but isn't a symlink or doesn't need case correction. */ #ifdef WIN32_ANY if (errno != EINVAL && errno != ENOENT) #else if (errno != EINVAL) #endif goto done; } else { /* Protect against infinite loops. */ if (readlinks++ > MAX_READLINKS) { errno = ELOOP; goto done; } /* Note: readlink doesn't add the null byte. */ link_path[n] = '\0'; abslen = abs_start (link_path); if (abslen > 0) { /* Start over for an absolute symlink. */ new_path = resolved_path; qxestrcat (link_path, path); path = link_path; goto restart; } /* Otherwise back up over this component. */ for (--new_path; !IS_DIRECTORY_SEP (*new_path); --new_path) assert (new_path > resolved_path); /* Safe sex check. */ if (qxestrlen (path) + n >= PATH_MAX_INTERNAL) { errno = ENAMETOOLONG; goto done; } /* Insert symlink contents into path. */ qxestrcat (link_path, path); qxestrcpy (copy_path, link_path); path = copy_path; } #endif /* HAVE_READLINK || WIN32_ANY */ *new_path++ = DIRECTORY_SEP; } /* Delete trailing slash but don't whomp a lone slash. */ if (new_path != resolved_path + abs_start (resolved_path) && IS_DIRECTORY_SEP (new_path[-1])) new_path--; /* Make sure it's null terminated. */ *new_path = '\0'; retval = resolved_path; done: PROFILE_RECORD_EXITING_SECTION (QSin_qxe_realpath); return retval; } void vars_of_realpath (void) { QSin_qxe_realpath = build_defer_string ("(in qxe_realpath)"); staticpro (&QSin_qxe_realpath); }