summaryrefslogtreecommitdiff
path: root/lib/relocatable.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/relocatable.c')
-rw-r--r--lib/relocatable.c160
1 files changed, 44 insertions, 116 deletions
diff --git a/lib/relocatable.c b/lib/relocatable.c
index 66532b40..172e91c9 100644
--- a/lib/relocatable.c
+++ b/lib/relocatable.c
@@ -1,19 +1,21 @@
/* Provide relocatable packages.
- Copyright (C) 2003-2006, 2008-2015 Free Software Foundation, Inc.
+ Copyright (C) 2003-2006, 2008-2010 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 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 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 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 Lesser General Public License for more details.
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
- You should have received a copy of the GNU Lesser General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>. */
+ 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. */
/* Tell glibc's <stdio.h> to provide a prototype for getline().
@@ -23,7 +25,6 @@
# define _GNU_SOURCE 1
#endif
-#define _GL_USE_STDLIB_ALLOC 1
#include <config.h>
/* Specification. */
@@ -42,19 +43,11 @@
# 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
@@ -77,8 +70,8 @@
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__
- /* Native Windows, OS/2, DOS */
+#if defined _WIN32 || defined __WIN32__ || defined __CYGWIN__ || defined __EMX__ || defined __DJGPP__
+ /* Win32, Cygwin, OS/2, DOS */
# define ISSLASH(C) ((C) == '/' || (C) == '\\')
# define HAS_DEVICE(P) \
((((P)[0] >= 'A' && (P)[0] <= 'Z') || ((P)[0] >= 'a' && (P)[0] <= 'z')) \
@@ -93,19 +86,6 @@
# 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;
@@ -175,7 +155,7 @@ set_relocation_prefix (const char *orig_prefix_arg, const char *curr_prefix_arg)
#endif
}
-#if !defined IN_LIBRARY || (defined PIC && defined INSTALLDIR && ENABLE_COSTLY_RELOCATABLE)
+#if !defined IN_LIBRARY || (defined PIC && defined INSTALLDIR)
/* Convenience function:
Computes the current installation prefix, based on the original
@@ -257,7 +237,7 @@ 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__
- /* Native Windows, Cygwin, OS/2, DOS - case insignificant file system */
+ /* Win32, 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;
@@ -305,17 +285,12 @@ compute_curr_prefix (const char *orig_installprefix,
#endif /* !IN_LIBRARY || PIC */
-#if defined PIC && defined INSTALLDIR && ENABLE_COSTLY_RELOCATABLE
+#if defined PIC && defined INSTALLDIR
/* Full pathname of shared library, or NULL. */
static char *shared_library_fullname;
-#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>). */
+#if defined _WIN32 || defined __WIN32__ || defined __CYGWIN__
/* Determine the full pathname of the shared library when it is loaded. */
@@ -337,62 +312,37 @@ DllMain (HINSTANCE module_handle, DWORD event, LPVOID reserved)
/* Shouldn't happen. */
return FALSE;
- shared_library_fullname = strdup (location);
- }
-
- return TRUE;
-}
-
-#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);
+ {
+#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);
- break;
-
- case 1:
- __ctordtorTerm();
-
- _CRT_term ();
- break;
+#endif
+ }
}
- return 1;
+ return TRUE;
}
-#else /* Unix */
+#else /* Unix except Cygwin */
static void
find_shared_library_fullname ()
{
-#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. */
+#if defined __linux__ && __GLIBC__ >= 2
+ /* Linux has /proc/self/maps. glibc 2 has the getline() function. */
FILE *fp;
/* Open the current process' maps file. It describes one VMA per line. */
@@ -437,16 +387,15 @@ find_shared_library_fullname ()
#endif
}
-#endif /* Native Windows / EMX / Unix */
+#endif /* (WIN32 or Cygwin) / (Unix except Cygwin) */
/* Return the full pathname of the current shared library.
Return NULL if unknown.
- Guaranteed to work only on Linux, EMX, Cygwin, and native Windows. */
+ Guaranteed to work only on Linux, Cygwin and Woe32. */
static char *
get_shared_library_fullname ()
{
-#if (!((defined _WIN32 || defined __WIN32__) && !defined __CYGWIN__) \
- && !defined __EMX__)
+#if !(defined _WIN32 || defined __WIN32__ || defined __CYGWIN__)
static bool tried_find_shared_library_fullname;
if (!tried_find_shared_library_fullname)
{
@@ -466,7 +415,7 @@ get_shared_library_fullname ()
const char *
relocate (const char *pathname)
{
-#if defined PIC && defined INSTALLDIR && ENABLE_COSTLY_RELOCATABLE
+#if defined PIC && defined INSTALLDIR
static int initialized;
/* Initialization code for a shared library. */
@@ -537,27 +486,6 @@ 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;
}