/* Provide relocatable programs.
- Copyright (C) 2003 Free Software Foundation, Inc.
+ Copyright (C) 2003-2009 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
- 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 General Public License as published by
+ the Free Software Foundation; either version 3 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
-#ifdef HAVE_CONFIG_H
-# include "config.h"
-#endif
+#include <config.h>
/* Specification. */
#include "progname.h"
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
-#if HAVE_UNISTD_H
-# include <unistd.h>
-#endif
+#include <unistd.h>
#include <sys/stat.h>
+/* Get declaration of _NSGetExecutablePath on MacOS X 10.2 or newer. */
+#if HAVE_MACH_O_DYLD_H
+# include <mach-o/dyld.h>
+#endif
+
#if defined _WIN32 || defined __WIN32__
-# undef WIN32 /* avoid warning on mingw32 */
-# define WIN32
+# define WIN32_NATIVE
#endif
-#ifdef WIN32
+#if defined WIN32_NATIVE || defined __CYGWIN__
# define WIN32_LEAN_AND_MEAN
# include <windows.h>
#endif
-#include "xreadlink.h"
#include "canonicalize.h"
#include "relocatable.h"
#ifdef NO_XMALLOC
+# include "areadlink.h"
+# define xreadlink areadlink
+#else
+# include "xreadlink.h"
+#endif
+
+#ifdef NO_XMALLOC
# define xmalloc malloc
+# define xstrdup strdup
#else
-# include "xmalloc.h"
+# include "xalloc.h"
#endif
/* Pathname support.
&& (P)[1] == ':')
# define IS_PATH_WITH_DIR(P) \
(strchr (P, '/') != NULL || strchr (P, '\\') != NULL || HAS_DEVICE (P))
-# define FILESYSTEM_PREFIX_LEN(P) (HAS_DEVICE (P) ? 2 : 0)
+# define FILE_SYSTEM_PREFIX_LEN(P) (HAS_DEVICE (P) ? 2 : 0)
#else
/* Unix */
# define ISSLASH(C) ((C) == '/')
# define IS_PATH_WITH_DIR(P) (strchr (P, '/') != NULL)
-# define FILESYSTEM_PREFIX_LEN(P) 0
+# define FILE_SYSTEM_PREFIX_LEN(P) 0
#endif
+/* The results of open() in this file are not used with fchdir,
+ therefore save some unnecessary work in fchdir.c. */
+#undef open
+#undef close
+
#undef set_program_name
static bool
maybe_executable (const char *filename)
{
-#if !defined WIN32
+ /* Woe32 lacks the access() function, but Cygwin doesn't. */
+#if !(defined WIN32_NATIVE && !defined __CYGWIN__)
if (access (filename, X_OK) < 0)
return false;
static char *
find_executable (const char *argv0)
{
-#ifdef WIN32
- char buf[1024];
- int length = GetModuleFileName (NULL, buf, sizeof (buf));
+#if defined WIN32_NATIVE || defined __CYGWIN__
+ char location[MAX_PATH];
+ int length = GetModuleFileName (NULL, location, sizeof (location));
if (length < 0)
return NULL;
- if (!IS_PATH_WITH_DIR (buf))
+ if (!IS_PATH_WITH_DIR (location))
/* Shouldn't happen. */
return NULL;
- return xstrdup (buf);
-#else /* Unix */
+ {
+#if defined __CYGWIN__
+ /* cygwin-1.5.13 (2005-03-01) or newer would also allow a Linux-like
+ implementation: readlink of "/proc/self/exe". But using the
+ result of the Win32 system call is simpler and is consistent with the
+ code in relocatable.c. */
+ /* 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 NULL;
+ /* Call canonicalize_file_name, because Cygwin supports symbolic links. */
+ return canonicalize_file_name (location_as_posix_path);
+#else
+ return xstrdup (location);
+#endif
+ }
+#else /* Unix && !Cygwin */
#ifdef __linux__
/* The executable is accessible as /proc/<pid>/exe. In newer Linux
versions, also as /proc/self/exe. Linux >= 2.1 provides a symlink
}
}
#endif
+#if HAVE_MACH_O_DYLD_H && HAVE__NSGETEXECUTABLEPATH
+ /* On MacOS X 10.2 or newer, the function
+ int _NSGetExecutablePath (char *buf, uint32_t *bufsize);
+ can be used to retrieve the executable's full path. */
+ char location[4096];
+ unsigned int length = sizeof (location);
+ if (_NSGetExecutablePath (location, &length) == 0
+ && location[0] == '/')
+ return canonicalize_file_name (location);
+#endif
/* Guess the executable's full path. We assume the executable has been
called via execlp() or execvp() with properly set up argv[0]. The
login(1) convention to add a '-' prefix to argv[0] is not supported. */
prepare_relocate (const char *orig_installprefix, const char *orig_installdir,
const char *argv0)
{
- const char *curr_prefix;
+ char *curr_prefix;
/* Determine the full pathname of the current executable. */
executable_fullname = find_executable (argv0);
curr_prefix = compute_curr_prefix (orig_installprefix, orig_installdir,
executable_fullname);
if (curr_prefix != NULL)
- /* Now pass this prefix to all copies of the relocate.c source file. */
- set_relocation_prefix (orig_installprefix, curr_prefix);
+ {
+ /* Now pass this prefix to all copies of the relocate.c source file. */
+ set_relocation_prefix (orig_installprefix, curr_prefix);
+
+ free (curr_prefix);
+ }
}
/* Set program_name, based on argv[0], and original installation prefix and
{
const char *argv0_stripped = argv0;
- /* Relocatable programs are renamed to .bin by install-reloc. Remove
- this suffix here. */
+ /* Relocatable programs are renamed to .bin by install-reloc. Or, more
+ generally, their suffix is changed from $exeext to .bin$exeext.
+ Remove the ".bin" here. */
{
size_t argv0_len = strlen (argv0);
- if (argv0_len > 4 && memcmp (argv0 + argv0_len - 4, ".bin", 4) == 0)
- {
- char *shorter = (char *) xmalloc (argv0_len - 4 + 1);
+ const size_t exeext_len = sizeof (EXEEXT) - sizeof ("");
+ if (argv0_len > 4 + exeext_len)
+ if (memcmp (argv0 + argv0_len - exeext_len - 4, ".bin", 4) == 0)
+ {
+ if (sizeof (EXEEXT) > sizeof (""))
+ {
+ /* Compare using an inlined copy of c_strncasecmp(), because
+ the filenames may have undergone a case conversion since
+ they were packaged. In other words, EXEEXT may be ".exe"
+ on one system and ".EXE" on another. */
+ static const char exeext[] = EXEEXT;
+ const char *s1 = argv0 + argv0_len - exeext_len;
+ const char *s2 = exeext;
+ for (; *s1 != '\0'; s1++, s2++)
+ {
+ unsigned char c1 = *s1;
+ unsigned char c2 = *s2;
+ if ((c1 >= 'A' && c1 <= 'Z' ? c1 - 'A' + 'a' : c1)
+ != (c2 >= 'A' && c2 <= 'Z' ? c2 - 'A' + 'a' : c2))
+ goto done_stripping;
+ }
+ }
+ /* Remove ".bin" before EXEEXT or its equivalent. */
+ {
+ char *shorter = (char *) xmalloc (argv0_len - 4 + 1);
#ifdef NO_XMALLOC
- if (shorter != NULL)
+ if (shorter != NULL)
#endif
- {
- memcpy (shorter, argv0, argv0_len - 4);
- shorter[argv0_len - 4] = '\0';
- argv0_stripped = shorter;
+ {
+ memcpy (shorter, argv0, argv0_len - exeext_len - 4);
+ if (sizeof (EXEEXT) > sizeof (""))
+ memcpy (shorter + argv0_len - exeext_len - 4,
+ argv0 + argv0_len - exeext_len - 4,
+ exeext_len);
+ shorter[argv0_len - 4] = '\0';
+ argv0_stripped = shorter;
+ }
}
+ done_stripping: ;
}
}
projects / gnulib.git / blobdiff