mainBundle patch fix

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@6482 72102866-910b-0410-8b05-ffd578937521

ChangeLog

@@ -1,3 +1,14 @@
+2000-04-18  Adam Fedor  <fedor@gnu.org>
+
+	* base/configure.in: add a test to see whether a symlink
+	'/proc/self/exe' exists
+        * base/Headers/gnustep/base/config.h.in: Add a definition for the
+	test result
+        * base/Source/NSBundle.m: Move the discovery of the process'
+	executable file to +initialize; add code to discover it from
+	/proc, if possible (patches from Jonathan Gapen 
+	<jagapen@whitewater.chem.wisc.edu>)
+
 2000-04-18  Richard Frith-Macdonald <rfm@gnu.org>
 
 	* Documentation/gsdoc/NSCountedSet.gsdoc: Method descriptions fleshed

Headers/gnustep/base/config.h.in

@@ -36,6 +36,9 @@
 /* Define if your Lib C defines program_invocation_name */
 #undef HAVE_PROGRAM_INVOCATION_NAME
 
+/* Define if your system has a /proc/self/exe symlink to the executable */
+#undef HAVE_PROC_FS_EXE_LINK
+
 /* The number of bytes in a double.  */
 #undef SIZEOF_DOUBLE
 

Source/NSBundle.m

@@ -73,6 +73,9 @@ typedef enum {
 static NSBundle*   _mainBundle = nil;
 static NSMapTable* _bundles = NULL;
 
+/* Keep the path to the executable file for finding the main bundle. */
+static NSString *_executable_path;
+
 /*
  * An empty strings file table for use when localization files can't be found.
  */
@@ -252,6 +255,7 @@ _bundle_load_callback(Class theClass, Category *theCategory)
 	{
 	  NSMutableString	*system;
 	  NSString		*str;
+	  char			*output;
 
 	  if ((str = [env objectForKey: @"GNUSTEP_TARGET_DIR"]) != nil)
 	    gnustep_target_dir = RETAIN(str);
@@ -275,6 +279,18 @@ _bundle_load_callback(Class theClass, Category *theCategory)
 		    mutableCopy]);
 	  [system appendString: @"/Libraries"];
 
+#ifdef HAVE_PROC_FS_EXE_LINK
+	  _executable_path = [[NSFileManager defaultManager]
+	    pathContentOfSymbolicLinkAtPath: @"/proc/self/exe"];
+#else
+	  _executable_path =
+		[[[NSProcessInfo processInfo] arguments] objectAtIndex: 0];
+	  output = objc_find_executable([_executable_path cString]);
+	  NSAssert(output, NSInternalInconsistencyException);
+	  _executable_path = [NSString stringWithCString: output];
+	  OBJC_FREE(output);
+#endif
+
 	  _gnustep_bundle = RETAIN([NSBundle bundleWithPath: system]);
 	}
     }
@@ -309,17 +325,10 @@ _bundle_load_callback(Class theClass, Category *theCategory)
   [load_lock lock];
   if ( !_mainBundle ) 
     {
-      char *output;
       NSString *path, *s;
       
-      path = [[[NSProcessInfo processInfo] arguments] objectAtIndex: 0];
-      output = objc_find_executable([path cString]);
-      NSAssert(output, NSInternalInconsistencyException);
-      path = [NSString stringWithCString: output];
-      OBJC_FREE(output);
-
       /* Strip off the name of the program */
-      path = [path stringByDeletingLastPathComponent];
+      path = [_executable_path stringByDeletingLastPathComponent];
 
       /* The executable may not lie in the main bundle directory
 	 so we need to chop off the extra subdirectories, the library

acconfig.h

@@ -126,3 +126,6 @@
 
 /* Define if your Lib C defines program_invocation_name */
 #undef HAVE_PROGRAM_INVOCATION_NAME
+
+/* Define if your system has a /proc/self/exe symlink to the executable */
+#undef HAVE_PROC_FS_EXE_LINK

configure

@@ -4163,6 +4163,23 @@ else
   sys_proc_fs=no;
   echo "$ac_t""no" 1>&6
 fi
+# Linux (and others?) /proc contains a symlink to the executable
+# file from which the process loaded its code.  This can be used
+# by NSBundle.m to locate the main bundle.
+if test $sys_proc_fs = yes; then
+  echo $ac_n "checking link to executable in /proc""... $ac_c" 1>&6
+echo "configure:4172: checking link to executable in /proc" >&5
+  if test -L /proc/self/exe; then
+    cat >> confdefs.h <<\EOF
+#define HAVE_PROC_FS_EXE_LINK 1
+EOF
+
+    echo "$ac_t""yes" 1>&6
+  else
+    echo "$ac_t""no" 1>&6
+  fi
+fi
+
 
 #--------------------------------------------------------------------
 # Tools for making a DLL.

configure.in

@@ -652,6 +652,19 @@ else
   sys_proc_fs=no;
   AC_MSG_RESULT(no)
 fi
+# Linux (and others?) /proc contains a symlink to the executable
+# file from which the process loaded its code.  This can be used
+# by NSBundle.m to locate the main bundle.
+if test $sys_proc_fs = yes; then
+  AC_MSG_CHECKING(link to executable in /proc)
+  if test -L /proc/self/exe; then
+    AC_DEFINE(HAVE_PROC_FS_EXE_LINK)
+    AC_MSG_RESULT(yes)
+  else
+    AC_MSG_RESULT(no)
+  fi
+fi
+
 
 #--------------------------------------------------------------------
 # Tools for making a DLL.