diff options
Diffstat (limited to 'lib/relocatable.c')
| -rw-r--r-- | lib/relocatable.c | 160 |
1 files changed, 116 insertions, 44 deletions
diff --git a/lib/relocatable.c b/lib/relocatable.c index 172e91c..66532b4 100644 --- a/lib/relocatable.c +++ b/lib/relocatable.c @@ -1,21 +1,19 @@ /* Provide relocatable packages. - Copyright (C) 2003-2006, 2008-2010 Free Software Foundation, Inc. + Copyright (C) 2003-2006, 2008-2015 Free Software Foundation, Inc. Written by Bruno Haible <bruno@clisp.org>, 2003. - This program is free software; you can redistribute it and/or modify it - under the terms of the GNU Library General Public License as published - by the Free Software Foundation; either version 2, or (at your option) - any later version. + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU Lesser General Public License for more details. - You should have received a copy of the GNU Library General Public - License along with this program; if not, write to the Free Software - Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, - USA. */ + You should have received a copy of the GNU Lesser General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. */ /* Tell glibc's <stdio.h> to provide a prototype for getline(). @@ -25,6 +23,7 @@ # define _GNU_SOURCE 1 #endif +#define _GL_USE_STDLIB_ALLOC 1 #include <config.h> /* Specification. */ @@ -43,11 +42,19 @@ # include "xalloc.h" #endif -#if defined _WIN32 || defined __WIN32__ || defined __CYGWIN__ +#if (defined _WIN32 || defined __WIN32__) && !defined __CYGWIN__ # define WIN32_LEAN_AND_MEAN # include <windows.h> #endif +#ifdef __EMX__ +# define INCL_DOS +# include <os2.h> + +# define strcmp stricmp +# define strncmp strnicmp +#endif + #if DEPENDS_ON_LIBCHARSET # include <libcharset.h> #endif @@ -70,8 +77,8 @@ ISSLASH(C) tests whether C is a directory separator character. IS_PATH_WITH_DIR(P) tests whether P contains a directory specification. */ -#if defined _WIN32 || defined __WIN32__ || defined __CYGWIN__ || defined __EMX__ || defined __DJGPP__ - /* Win32, Cygwin, OS/2, DOS */ +#if ((defined _WIN32 || defined __WIN32__) && !defined __CYGWIN__) || defined __EMX__ || defined __DJGPP__ + /* Native Windows, OS/2, DOS */ # define ISSLASH(C) ((C) == '/' || (C) == '\\') # define HAS_DEVICE(P) \ ((((P)[0] >= 'A' && (P)[0] <= 'Z') || ((P)[0] >= 'a' && (P)[0] <= 'z')) \ @@ -86,6 +93,19 @@ # define FILE_SYSTEM_PREFIX_LEN(P) 0 #endif +/* Whether to enable the more costly support for relocatable libraries. + It allows libraries to be have been installed with a different original + prefix than the program. But it is quite costly, especially on Cygwin + platforms, see below. Therefore we enable it by default only on native + Windows platforms. */ +#ifndef ENABLE_COSTLY_RELOCATABLE +# if (defined _WIN32 || defined __WIN32__) && !defined __CYGWIN__ +# define ENABLE_COSTLY_RELOCATABLE 1 +# else +# define ENABLE_COSTLY_RELOCATABLE 0 +# endif +#endif + /* Original installation prefix. */ static char *orig_prefix; static size_t orig_prefix_len; @@ -155,7 +175,7 @@ set_relocation_prefix (const char *orig_prefix_arg, const char *curr_prefix_arg) #endif } -#if !defined IN_LIBRARY || (defined PIC && defined INSTALLDIR) +#if !defined IN_LIBRARY || (defined PIC && defined INSTALLDIR && ENABLE_COSTLY_RELOCATABLE) /* Convenience function: Computes the current installation prefix, based on the original @@ -237,7 +257,7 @@ compute_curr_prefix (const char *orig_installprefix, often case-insensitive. It's better to accept the comparison if the difference is only in case, rather than to fail. */ #if defined _WIN32 || defined __WIN32__ || defined __CYGWIN__ || defined __EMX__ || defined __DJGPP__ - /* Win32, Cygwin, OS/2, DOS - case insignificant file system */ + /* Native Windows, Cygwin, OS/2, DOS - case insignificant file system */ if ((*rpi >= 'a' && *rpi <= 'z' ? *rpi - 'a' + 'A' : *rpi) != (*cpi >= 'a' && *cpi <= 'z' ? *cpi - 'a' + 'A' : *cpi)) break; @@ -285,12 +305,17 @@ compute_curr_prefix (const char *orig_installprefix, #endif /* !IN_LIBRARY || PIC */ -#if defined PIC && defined INSTALLDIR +#if defined PIC && defined INSTALLDIR && ENABLE_COSTLY_RELOCATABLE /* Full pathname of shared library, or NULL. */ static char *shared_library_fullname; -#if defined _WIN32 || defined __WIN32__ || defined __CYGWIN__ +#if (defined _WIN32 || defined __WIN32__) && !defined __CYGWIN__ +/* Native Windows only. + On Cygwin, it is better to use the Cygwin provided /proc interface, than + to use native Windows API and cygwin_conv_to_posix_path, because it + supports longer file names + (see <http://cygwin.com/ml/cygwin/2011-01/msg00410.html>). */ /* Determine the full pathname of the shared library when it is loaded. */ @@ -312,37 +337,62 @@ DllMain (HINSTANCE module_handle, DWORD event, LPVOID reserved) /* Shouldn't happen. */ return FALSE; - { -#if defined __CYGWIN__ - /* On Cygwin, we need to convert paths coming from Win32 system calls - to the Unix-like slashified notation. */ - static char location_as_posix_path[2 * MAX_PATH]; - /* There's no error return defined for cygwin_conv_to_posix_path. - See cygwin-api/func-cygwin-conv-to-posix-path.html. - Does it overflow the buffer of expected size MAX_PATH or does it - truncate the path? I don't know. Let's catch both. */ - cygwin_conv_to_posix_path (location, location_as_posix_path); - location_as_posix_path[MAX_PATH - 1] = '\0'; - if (strlen (location_as_posix_path) >= MAX_PATH - 1) - /* A sign of buffer overflow or path truncation. */ - return FALSE; - shared_library_fullname = strdup (location_as_posix_path); -#else - shared_library_fullname = strdup (location); -#endif - } + shared_library_fullname = strdup (location); } return TRUE; } -#else /* Unix except Cygwin */ +#elif defined __EMX__ + +extern int _CRT_init (void); +extern void _CRT_term (void); +extern void __ctordtorInit (void); +extern void __ctordtorTerm (void); + +unsigned long _System +_DLL_InitTerm (unsigned long hModule, unsigned long ulFlag) +{ + static char location[CCHMAXPATH]; + + switch (ulFlag) + { + case 0: + if (_CRT_init () == -1) + return 0; + + __ctordtorInit(); + + /* See http://cyberkinetica.homeunix.net/os2tk45/cp1/1247_L2H_DosQueryModuleNameSy.html + for specification of DosQueryModuleName(). */ + if (DosQueryModuleName (hModule, sizeof (location), location)) + return 0; + + _fnslashify (location); + shared_library_fullname = strdup (location); + break; + + case 1: + __ctordtorTerm(); + + _CRT_term (); + break; + } + + return 1; +} + +#else /* Unix */ static void find_shared_library_fullname () { -#if defined __linux__ && __GLIBC__ >= 2 - /* Linux has /proc/self/maps. glibc 2 has the getline() function. */ +#if (defined __linux__ && (__GLIBC__ >= 2 || defined __UCLIBC__)) || defined __CYGWIN__ + /* Linux has /proc/self/maps. glibc 2 and uClibc have the getline() + function. + Cygwin >= 1.5 has /proc/self/maps and the getline() function too. + But it is costly: ca. 0.3 ms on Linux, 3 ms on Cygwin 1.5, and 5 ms on + Cygwin 1.7. */ FILE *fp; /* Open the current process' maps file. It describes one VMA per line. */ @@ -387,15 +437,16 @@ find_shared_library_fullname () #endif } -#endif /* (WIN32 or Cygwin) / (Unix except Cygwin) */ +#endif /* Native Windows / EMX / Unix */ /* Return the full pathname of the current shared library. Return NULL if unknown. - Guaranteed to work only on Linux, Cygwin and Woe32. */ + Guaranteed to work only on Linux, EMX, Cygwin, and native Windows. */ static char * get_shared_library_fullname () { -#if !(defined _WIN32 || defined __WIN32__ || defined __CYGWIN__) +#if (!((defined _WIN32 || defined __WIN32__) && !defined __CYGWIN__) \ + && !defined __EMX__) static bool tried_find_shared_library_fullname; if (!tried_find_shared_library_fullname) { @@ -415,7 +466,7 @@ get_shared_library_fullname () const char * relocate (const char *pathname) { -#if defined PIC && defined INSTALLDIR +#if defined PIC && defined INSTALLDIR && ENABLE_COSTLY_RELOCATABLE static int initialized; /* Initialization code for a shared library. */ @@ -486,6 +537,27 @@ relocate (const char *pathname) } } } + +#ifdef __EMX__ + if (pathname && ISSLASH (pathname[0])) + { + const char *unixroot = getenv ("UNIXROOT"); + + if (unixroot && HAS_DEVICE (unixroot) && !unixroot[2]) + { + char *result = (char *) xmalloc (2 + strlen (pathname) + 1); +#ifdef NO_XMALLOC + if (result != NULL) +#endif + { + strcpy (result, unixroot); + strcpy (result + 2, pathname); + return result; + } + } + } +#endif + /* Nothing to relocate. */ return pathname; } |