/* Provide relocatable packages.
- Copyright (C) 2003-2004 Free Software Foundation, Inc.
+ Copyright (C) 2003-2006, 2008-2009 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
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
USA. */
This must come before <config.h> because <config.h> may include
<features.h>, and once <features.h> has been included, it's too late. */
#ifndef _GNU_SOURCE
-# define _GNU_SOURCE 1
+# define _GNU_SOURCE 1
#endif
-#ifdef HAVE_CONFIG_H
-# include "config.h"
-#endif
+#include <config.h>
/* Specification. */
#include "relocatable.h"
# include "xalloc.h"
#endif
-#if defined _WIN32 || defined __WIN32__
+#if defined _WIN32 || defined __WIN32__ || defined __CYGWIN__
# define WIN32_LEAN_AND_MEAN
# include <windows.h>
#endif
instead of "/"). */
static void
set_this_relocation_prefix (const char *orig_prefix_arg,
- const char *curr_prefix_arg)
+ const char *curr_prefix_arg)
{
if (orig_prefix_arg != NULL && curr_prefix_arg != NULL
/* Optimization: if orig_prefix and curr_prefix are equal, the
- relocation is a nop. */
+ relocation is a nop. */
&& strcmp (orig_prefix_arg, curr_prefix_arg) != 0)
{
/* Duplicate the argument strings. */
#ifdef NO_XMALLOC
if (memory != NULL)
#endif
- {
- memcpy (memory, orig_prefix_arg, orig_prefix_len + 1);
- orig_prefix = memory;
- memory += orig_prefix_len + 1;
- memcpy (memory, curr_prefix_arg, curr_prefix_len + 1);
- curr_prefix = memory;
- return;
- }
+ {
+ memcpy (memory, orig_prefix_arg, orig_prefix_len + 1);
+ orig_prefix = memory;
+ memory += orig_prefix_len + 1;
+ memcpy (memory, curr_prefix_arg, curr_prefix_len + 1);
+ curr_prefix = memory;
+ return;
+ }
}
orig_prefix = NULL;
curr_prefix = NULL;
/* Convenience function:
Computes the current installation prefix, based on the original
installation prefix, the original installation directory of a particular
- file, and the current pathname of this file. Returns NULL upon failure. */
+ file, and the current pathname of this file.
+ Returns it, freshly allocated. Returns NULL upon failure. */
#ifdef IN_LIBRARY
#define compute_curr_prefix local_compute_curr_prefix
static
#endif
-const char *
+char *
compute_curr_prefix (const char *orig_installprefix,
- const char *orig_installdir,
- const char *curr_pathname)
+ const char *orig_installdir,
+ const char *curr_pathname)
{
- const char *curr_installdir;
+ char *curr_installdir;
const char *rel_installdir;
if (curr_pathname == NULL)
while (p > p_base)
{
- p--;
- if (ISSLASH (*p))
- break;
+ p--;
+ if (ISSLASH (*p))
+ break;
}
q = (char *) xmalloc (p - curr_pathname + 1);
while (rp > rel_installdir && cp > cp_base)
{
- bool same = false;
- const char *rpi = rp;
- const char *cpi = cp;
-
- while (rpi > rel_installdir && cpi > cp_base)
- {
- rpi--;
- cpi--;
- if (ISSLASH (*rpi) || ISSLASH (*cpi))
- {
- if (ISSLASH (*rpi) && ISSLASH (*cpi))
- same = true;
- break;
- }
+ bool same = false;
+ const char *rpi = rp;
+ const char *cpi = cp;
+
+ while (rpi > rel_installdir && cpi > cp_base)
+ {
+ rpi--;
+ cpi--;
+ if (ISSLASH (*rpi) || ISSLASH (*cpi))
+ {
+ if (ISSLASH (*rpi) && ISSLASH (*cpi))
+ same = true;
+ break;
+ }
+ /* Do case-insensitive comparison if the file system is always or
+ 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 filesystem */
- if ((*rpi >= 'a' && *rpi <= 'z' ? *rpi - 'a' + 'A' : *rpi)
- != (*cpi >= 'a' && *cpi <= 'z' ? *cpi - 'a' + 'A' : *cpi))
- break;
+ /* 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;
#else
- if (*rpi != *cpi)
- break;
+ if (*rpi != *cpi)
+ break;
#endif
- }
- if (!same)
- break;
- /* The last pathname component was the same. opi and cpi now point
- to the slash before it. */
- rp = rpi;
- cp = cpi;
+ }
+ if (!same)
+ break;
+ /* The last pathname component was the same. opi and cpi now point
+ to the slash before it. */
+ rp = rpi;
+ cp = cpi;
}
if (rp > rel_installdir)
- /* Unexpected: The curr_installdir does not end with rel_installdir. */
- return NULL;
+ {
+ /* Unexpected: The curr_installdir does not end with rel_installdir. */
+ free (curr_installdir);
+ return NULL;
+ }
{
size_t curr_prefix_len = cp - curr_installdir;
curr_prefix = (char *) xmalloc (curr_prefix_len + 1);
#ifdef NO_XMALLOC
if (curr_prefix == NULL)
- return NULL;
+ {
+ free (curr_installdir);
+ return NULL;
+ }
#endif
memcpy (curr_prefix, curr_installdir, curr_prefix_len);
curr_prefix[curr_prefix_len] = '\0';
+ free (curr_installdir);
+
return curr_prefix;
}
}
/* Full pathname of shared library, or NULL. */
static char *shared_library_fullname;
-#if defined _WIN32 || defined __WIN32__
+#if defined _WIN32 || defined __WIN32__ || defined __CYGWIN__
/* Determine the full pathname of the shared library when it is loaded. */
static char location[MAX_PATH];
if (!GetModuleFileName (module_handle, location, sizeof (location)))
- /* Shouldn't happen. */
- return FALSE;
+ /* Shouldn't happen. */
+ return FALSE;
if (!IS_PATH_WITH_DIR (location))
- /* Shouldn't happen. */
- return FALSE;
+ /* Shouldn't happen. */
+ return FALSE;
- shared_library_fullname = strdup (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);
+#endif
+ }
}
return TRUE;
}
-#else /* Unix */
+#else /* Unix except Cygwin */
static void
find_shared_library_fullname ()
{
unsigned long address = (unsigned long) &find_shared_library_fullname;
for (;;)
- {
- unsigned long start, end;
- int c;
-
- if (fscanf (fp, "%lx-%lx", &start, &end) != 2)
- break;
- if (address >= start && address <= end - 1)
- {
- /* Found it. Now see if this line contains a filename. */
- while (c = getc (fp), c != EOF && c != '\n' && c != '/')
- continue;
- if (c == '/')
- {
- size_t size;
- int len;
-
- ungetc (c, fp);
- shared_library_fullname = NULL; size = 0;
- len = getline (&shared_library_fullname, &size, fp);
- if (len >= 0)
- {
- /* Success: filled shared_library_fullname. */
- if (len > 0 && shared_library_fullname[len - 1] == '\n')
- shared_library_fullname[len - 1] = '\0';
- }
- }
- break;
- }
- while (c = getc (fp), c != EOF && c != '\n')
- continue;
- }
+ {
+ unsigned long start, end;
+ int c;
+
+ if (fscanf (fp, "%lx-%lx", &start, &end) != 2)
+ break;
+ if (address >= start && address <= end - 1)
+ {
+ /* Found it. Now see if this line contains a filename. */
+ while (c = getc (fp), c != EOF && c != '\n' && c != '/')
+ continue;
+ if (c == '/')
+ {
+ size_t size;
+ int len;
+
+ ungetc (c, fp);
+ shared_library_fullname = NULL; size = 0;
+ len = getline (&shared_library_fullname, &size, fp);
+ if (len >= 0)
+ {
+ /* Success: filled shared_library_fullname. */
+ if (len > 0 && shared_library_fullname[len - 1] == '\n')
+ shared_library_fullname[len - 1] = '\0';
+ }
+ }
+ break;
+ }
+ while (c = getc (fp), c != EOF && c != '\n')
+ continue;
+ }
fclose (fp);
}
#endif
}
-#endif /* WIN32 / 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 and Woe32. */
+ Guaranteed to work only on Linux, Cygwin and Woe32. */
static char *
get_shared_library_fullname ()
{
-#if !(defined _WIN32 || defined __WIN32__)
+#if !(defined _WIN32 || defined __WIN32__ || defined __CYGWIN__)
static bool tried_find_shared_library_fullname;
if (!tried_find_shared_library_fullname)
{
#endif /* PIC */
/* Returns the pathname, relocated according to the current installation
- directory. */
+ directory.
+ The returned string is either PATHNAME unmodified or a freshly allocated
+ string that you can free with free() after casting it to 'char *'. */
const char *
relocate (const char *pathname)
{
if (!initialized)
{
/* At this point, orig_prefix and curr_prefix likely have already been
- set through the main program's set_program_name_and_installdir
- function. This is sufficient in the case that the library has
- initially been installed in the same orig_prefix. But we can do
- better, to also cover the cases that 1. it has been installed
- in a different prefix before being moved to orig_prefix and (later)
- to curr_prefix, 2. unlike the program, it has not moved away from
- orig_prefix. */
+ set through the main program's set_program_name_and_installdir
+ function. This is sufficient in the case that the library has
+ initially been installed in the same orig_prefix. But we can do
+ better, to also cover the cases that 1. it has been installed
+ in a different prefix before being moved to orig_prefix and (later)
+ to curr_prefix, 2. unlike the program, it has not moved away from
+ orig_prefix. */
const char *orig_installprefix = INSTALLPREFIX;
const char *orig_installdir = INSTALLDIR;
- const char *curr_prefix_better;
+ char *curr_prefix_better;
curr_prefix_better =
- compute_curr_prefix (orig_installprefix, orig_installdir,
- get_shared_library_fullname ());
- if (curr_prefix_better == NULL)
- curr_prefix_better = curr_prefix;
+ compute_curr_prefix (orig_installprefix, orig_installdir,
+ get_shared_library_fullname ());
+
+ set_relocation_prefix (orig_installprefix,
+ curr_prefix_better != NULL
+ ? curr_prefix_better
+ : curr_prefix);
- set_relocation_prefix (orig_installprefix, curr_prefix_better);
+ if (curr_prefix_better != NULL)
+ free (curr_prefix_better);
initialized = 1;
}
#endif
/* Note: It is not necessary to perform case insensitive comparison here,
- even for DOS-like filesystems, because the pathname argument was
+ even for DOS-like file systems, because the pathname argument was
typically created from the same Makefile variable as orig_prefix came
from. */
if (orig_prefix != NULL && curr_prefix != NULL
&& strncmp (pathname, orig_prefix, orig_prefix_len) == 0)
{
if (pathname[orig_prefix_len] == '\0')
- /* pathname equals orig_prefix. */
- return curr_prefix;
- if (ISSLASH (pathname[orig_prefix_len]))
- {
- /* pathname starts with orig_prefix. */
- const char *pathname_tail = &pathname[orig_prefix_len];
- char *result =
- (char *) xmalloc (curr_prefix_len + strlen (pathname_tail) + 1);
+ {
+ /* pathname equals orig_prefix. */
+ char *result = (char *) xmalloc (strlen (curr_prefix) + 1);
+
+#ifdef NO_XMALLOC
+ if (result != NULL)
+#endif
+ {
+ strcpy (result, curr_prefix);
+ return result;
+ }
+ }
+ else if (ISSLASH (pathname[orig_prefix_len]))
+ {
+ /* pathname starts with orig_prefix. */
+ const char *pathname_tail = &pathname[orig_prefix_len];
+ char *result =
+ (char *) xmalloc (curr_prefix_len + strlen (pathname_tail) + 1);
#ifdef NO_XMALLOC
- if (result != NULL)
+ if (result != NULL)
#endif
- {
- memcpy (result, curr_prefix, curr_prefix_len);
- strcpy (result + curr_prefix_len, pathname_tail);
- return result;
- }
- }
+ {
+ memcpy (result, curr_prefix, curr_prefix_len);
+ strcpy (result + curr_prefix_len, pathname_tail);
+ return result;
+ }
+ }
}
/* Nothing to relocate. */
return pathname;
projects / pkg / abook.git / blobdiff