/* Provide relocatable programs.
- Copyright (C) 2003-2011 Free Software Foundation, Inc.
+ Copyright (C) 2003-2014 Free Software Foundation, Inc.
Written by Bruno Haible <bruno@clisp.org>, 2003.
This program is free software: you can redistribute it and/or modify
along with this program. If not, see <http://www.gnu.org/licenses/>. */
+#define _GL_USE_STDLIB_ALLOC 1
#include <config.h>
/* Specification. */
#include <unistd.h>
#include <sys/stat.h>
-/* Get declaration of _NSGetExecutablePath on MacOS X 10.2 or newer. */
+/* Get declaration of _NSGetExecutablePath on Mac OS X 10.2 or newer. */
#if HAVE_MACH_O_DYLD_H
# include <mach-o/dyld.h>
#endif
-#if defined _WIN32 || defined __WIN32__
-# define WIN32_NATIVE
+#if (defined _WIN32 || defined __WIN32__) && !defined __CYGWIN__
+# define WINDOWS_NATIVE
#endif
-#if defined WIN32_NATIVE || defined __CYGWIN__
+#ifdef WINDOWS_NATIVE
# define WIN32_LEAN_AND_MEAN
# include <windows.h>
#endif
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')) \
#undef close
/* Use the system functions, not the gnulib overrides in this file. */
-#undef malloc
#undef sprintf
#undef set_program_name
#if ENABLE_RELOCATABLE
-#ifdef __linux__
+#if defined __linux__ || defined __CYGWIN__
/* File descriptor of the executable.
(Only used to verify that we find the correct executable.) */
static int executable_fd = -1;
static bool
maybe_executable (const char *filename)
{
- /* Woe32 lacks the access() function, but Cygwin doesn't. */
-#if !(defined WIN32_NATIVE && !defined __CYGWIN__)
+ /* The native Windows API lacks the access() function. */
+#if !defined WINDOWS_NATIVE
if (access (filename, X_OK) < 0)
return false;
+#endif
-# ifdef __linux__
+#if defined __linux__ || defined __CYGWIN__
if (executable_fd >= 0)
{
/* If we already have an executable_fd, check that filename points to
return false;
}
}
-# endif
#endif
return true;
/* Determine the full pathname of the current executable, freshly allocated.
Return NULL if unknown.
- Guaranteed to work on Linux and Woe32. Likely to work on the other
- Unixes (maybe except BeOS), under most conditions. */
+ Guaranteed to work on Linux and native Windows. Likely to work on the
+ other Unixes (maybe except BeOS), under most conditions. */
static char *
find_executable (const char *argv0)
{
-#if defined WIN32_NATIVE || defined __CYGWIN__
+#if defined WINDOWS_NATIVE
+ /* 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>). */
char location[MAX_PATH];
int length = GetModuleFileName (NULL, location, sizeof (location));
if (length < 0)
if (!IS_PATH_WITH_DIR (location))
/* Shouldn't happen. */
return NULL;
- {
-# 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 */
+ return xstrdup (location);
+#else /* Unix */
# 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
+# ifdef __CYGWIN__
+ /* The executable is accessible as /proc/<pid>/exe, at least in
+ Cygwin >= 1.5. */
+ {
+ char *link;
+
+ link = xreadlink ("/proc/self/exe");
+ if (link != NULL)
+ return link;
+ if (executable_fd < 0)
+ executable_fd = open ("/proc/self/exe", O_EXEC, 0);
+ }
+# endif
# if HAVE_MACH_O_DYLD_H && HAVE__NSGETEXECUTABLEPATH
- /* On MacOS X 10.2 or newer, the function
+ /* On Mac OS 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];
projects / gnulib.git / blobdiff