/* Provide relocatable programs.
- Copyright (C) 2003-2009 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
# include "xalloc.h"
#endif
+#ifndef O_EXEC
+# define O_EXEC O_RDONLY /* This is often close enough in older systems. */
+#endif
+
+/* Declare canonicalize_file_name.
+ The <stdlib.h> included above may be the system's one, not the gnulib
+ one. */
+extern char * canonicalize_file_name (const char *name);
+
/* Pathname support.
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 open
#undef close
+/* Use the system functions, not the gnulib overrides in this file. */
+#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
- the same inode. */
+ the same inode. */
struct stat statexe;
struct stat statfile;
if (fstat (executable_fd, &statexe) >= 0)
- {
- if (stat (filename, &statfile) < 0)
- return false;
- if (!(statfile.st_dev
- && statfile.st_dev == statexe.st_dev
- && statfile.st_ino == statexe.st_ino))
- return false;
- }
+ {
+ if (stat (filename, &statfile) < 0)
+ return false;
+ if (!(statfile.st_dev
+ && statfile.st_dev == statexe.st_dev
+ && statfile.st_ino == statexe.st_ino))
+ 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 */
-#ifdef __linux__
+ 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
to the true pathname; older Linux versions give only device and ino,
if (link != NULL && link[0] != '[')
return link;
if (executable_fd < 0)
- executable_fd = open ("/proc/self/exe", O_RDONLY, 0);
+ executable_fd = open ("/proc/self/exe", O_EXEC, 0);
{
char buf[6+10+5];
sprintf (buf, "/proc/%d/exe", getpid ());
link = xreadlink (buf);
if (link != NULL && link[0] != '[')
- return link;
+ return link;
if (executable_fd < 0)
- executable_fd = open (buf, O_RDONLY, 0);
+ executable_fd = open (buf, O_EXEC, 0);
}
}
-#endif
-#if HAVE_MACH_O_DYLD_H && HAVE__NSGETEXECUTABLEPATH
- /* On MacOS X 10.2 or newer, the function
+# 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 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];
if (_NSGetExecutablePath (location, &length) == 0
&& location[0] == '/')
return canonicalize_file_name (location);
-#endif
+# 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. */
{
const char *p;
for (p = argv0; *p; p++)
- if (*p == '/')
- {
- has_slash = true;
- break;
- }
+ if (*p == '/')
+ {
+ has_slash = true;
+ break;
+ }
}
if (!has_slash)
{
- /* exec searches paths without slashes in the directory list given
- by $PATH. */
- const char *path = getenv ("PATH");
-
- if (path != NULL)
- {
- const char *p;
- const char *p_next;
-
- for (p = path; *p; p = p_next)
- {
- const char *q;
- size_t p_len;
- char *concat_name;
-
- for (q = p; *q; q++)
- if (*q == ':')
- break;
- p_len = q - p;
- p_next = (*q == '\0' ? q : q + 1);
-
- /* We have a path item at p, of length p_len.
- Now concatenate the path item and argv0. */
- concat_name = (char *) xmalloc (p_len + strlen (argv0) + 2);
-#ifdef NO_XMALLOC
- if (concat_name == NULL)
- return NULL;
-#endif
- if (p_len == 0)
- /* An empty PATH element designates the current directory. */
- strcpy (concat_name, argv0);
- else
- {
- memcpy (concat_name, p, p_len);
- concat_name[p_len] = '/';
- strcpy (concat_name + p_len + 1, argv0);
- }
- if (maybe_executable (concat_name))
- return canonicalize_file_name (concat_name);
- free (concat_name);
- }
- }
- /* Not found in the PATH, assume the current directory. */
+ /* exec searches paths without slashes in the directory list given
+ by $PATH. */
+ const char *path = getenv ("PATH");
+
+ if (path != NULL)
+ {
+ const char *p;
+ const char *p_next;
+
+ for (p = path; *p; p = p_next)
+ {
+ const char *q;
+ size_t p_len;
+ char *concat_name;
+
+ for (q = p; *q; q++)
+ if (*q == ':')
+ break;
+ p_len = q - p;
+ p_next = (*q == '\0' ? q : q + 1);
+
+ /* We have a path item at p, of length p_len.
+ Now concatenate the path item and argv0. */
+ concat_name = (char *) xmalloc (p_len + strlen (argv0) + 2);
+# ifdef NO_XMALLOC
+ if (concat_name == NULL)
+ return NULL;
+# endif
+ if (p_len == 0)
+ /* An empty PATH element designates the current directory. */
+ strcpy (concat_name, argv0);
+ else
+ {
+ memcpy (concat_name, p, p_len);
+ concat_name[p_len] = '/';
+ strcpy (concat_name + p_len + 1, argv0);
+ }
+ if (maybe_executable (concat_name))
+ return canonicalize_file_name (concat_name);
+ free (concat_name);
+ }
+ }
+ /* Not found in the PATH, assume the current directory. */
}
/* exec treats paths containing slashes as relative to the current
directory. */
static void
prepare_relocate (const char *orig_installprefix, const char *orig_installdir,
- const char *argv0)
+ const char *argv0)
{
char *curr_prefix;
/* Determine the current installation prefix from it. */
curr_prefix = compute_curr_prefix (orig_installprefix, orig_installdir,
- executable_fullname);
+ executable_fullname);
if (curr_prefix != NULL)
{
/* Now pass this prefix to all copies of the relocate.c source file. */
directory, for relocatability. */
void
set_program_name_and_installdir (const char *argv0,
- const char *orig_installprefix,
- const char *orig_installdir)
+ const char *orig_installprefix,
+ const char *orig_installdir)
{
const char *argv0_stripped = argv0;
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);
+ {
+ 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 - 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: ;
+ {
+ 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