Much new build world.

[authbind.git] / authbind.c

diff --git a/authbind.c b/authbind.c
index 6d957aeba5df4cb9d4d8dc1532eb6d544d9ca1db..7f80e3e8789536787868f3dad7e6a7043e29d2df 100644 (file)
--- a/authbind.c
+++ b/authbind.c
@@ -1,28 +1,51 @@
-/**/
+/*
+ *  authbind.c - main invoker program
+ *
+ *  authbind is Copyright (C) 1998 Ian Jackson
+ * 
+ *  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 2, 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 General Public License for more details.
+ * 
+ *  You should have received a copy of the GNU 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. 
+ * 
+ */
 
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
 #include <unistd.h>
 
-#define LD_PRELOAD "LD_PRELOAD"
-#define AUTHBINDLIB "AUTHBIND_LIB"
-#define LIBAUTHBIND "/usr/lib/authbind/libauthbind.so.0"
+static const char *rcsid="$Id$";
+
+#ifndef LIBAUTHBIND
+# define "/usr/local/lib/authbind/libauthbind.so." MAJOR_VER
+#endif
+
+#define PRELOAD_VAR "LD_PRELOAD"
+#define AUTHBINDLIB_VAR "AUTHBIND_LIB"
 
 int main(int argc, char *const *argv) {
   const char *expreload, *authbindlib, *preload;
   char *newpreload;
 
-  authbindlib= getenv(AUTHBINDLIB);
-  if (!authbindlib) {
-    if (setenv(AUTHBINDLIB,LIBAUTHBIND,0)) {
-      perror("authbind: setenv " AUTHBINDLIB);
-      exit(-1);
-    }
-    authbindlib= LIBAUTHBIND;
+  if (argc<2 || argv[1][0]=='-') {
+    fprintf(stderr,"authbind: usage: authbind program arg arg ...\n %s\n",rcsid);
+    exit(-1);
   }
+
+  authbindlib= getenv(AUTHBINDLIB_VAR);
+  if (!authbindlib) authbindlib= LIBAUTHBIND;
     
-  if ((expreload= getenv(LD_PRELOAD))) {
+  if ((expreload= getenv(PRELOAD_VAR))) {
     newpreload= malloc(strlen(expreload)+strlen(authbindlib)+2);
     strcpy(newpreload,expreload);
     strcat(newpreload,":");
@@ -31,7 +54,7 @@ int main(int argc, char *const *argv) {
   } else {
     preload= authbindlib;
   }
-  if (setenv(LD_PRELOAD,preload,1)) { perror("authbind: setenv"); exit(-1); }
+  if (setenv(PRELOAD_VAR,preload,1)) { perror("authbind: setenv"); exit(-1); }
 
   execvp(argv[1],argv+1);
   perror(argv[1]); exit(-1);