bzr commit into mysql-5.1 branch (nirbhay.choubey:3645) Bug#11757855

[Nirbhay Choubey]

#At file:///home/nirbhay/Project/mysql/repo/bugs/mysql-5.1.49967/ based on revid:magne.mahre@stripped

 3645 Nirbhay Choubey	2011-04-09
      Bug#11757855 - 49967: built-in libedit doesn't read
                            .editrc on linux.
      
      MySQL client when build with libedit support ignores
      .editrc at startup.
      
      The reason for this regression was the incluison of a
      safety check, issetugid(), which is not available on
      some linux platforms.
      
      Fixed by adding an equivalent check for platforms which
      have get[e][u|g]id() set of functions.
     @ cmd-line-utils/libedit/el.c
        Bug#11757855 - 49967: built-in libedit doesn't read
                              .editrc on linux.
        
        Added function calls to check user/group IDs on linux
        systems which does not have issetugid() function.
     @ configure.in
        Bug#11757855 - 49967: built-in libedit doesn't read
                              .editrc on linux.
        
        Added check for getuid, geteuid, getgid, getegid
        functions.

    modified:
      cmd-line-utils/libedit/el.c
      configure.in
=== modified file 'cmd-line-utils/libedit/el.c'
--- a/cmd-line-utils/libedit/el.c	2009-06-11 16:21:32 +0000
+++ b/cmd-line-utils/libedit/el.c	2011-04-08 19:42:58 +0000
@@ -478,7 +478,10 @@ el_source(EditLine *el, const char *fnam
 
 	fp = NULL;
 	if (fname == NULL) {
-#ifdef HAVE_ISSETUGID
+#if (defined(HAVE_ISSETUGID) || (defined(HAVE_GETUID) && \
+                                 defined(HAVE_GETEUID) && \
+                                 defined(HAVE_GETGID) && \
+                                 defined(HAVE_GETEGID)))
 		static const char elpath[] = "/.editrc";
 /* XXXMYSQL: Portability fix (for which platforms?) */
 #ifdef MAXPATHLEN
@@ -486,9 +489,13 @@ el_source(EditLine *el, const char *fnam
 #else
 		char path[4096];
 #endif
-
+#ifdef HAVE_ISSETUGID
 		if (issetugid())
 			return (-1);
+#else
+                if (getuid() != geteuid() || getgid() != getegid())
+                  return (-1);
+#endif
 		if ((ptr = getenv("HOME")) == NULL)
 			return (-1);
 		if (strlcpy(path, ptr, sizeof(path)) >= sizeof(path))
@@ -498,9 +505,10 @@ el_source(EditLine *el, const char *fnam
 		fname = path;
 #else
 		/*
-		 * If issetugid() is missing, always return an error, in order
-		 * to keep from inadvertently opening up the user to a security
-		 * hole.
+		 * If issetugid() or the above mentioned get[e][u|g]id()
+		 * functions are missing, always return an error, in order
+		 * to keep from inadvertently opening up the user to a
+		 * security hole.
 		 */
 		return (-1);
 #endif

=== modified file 'configure.in'
--- a/configure.in	2011-03-03 20:11:47 +0000
+++ b/configure.in	2011-04-08 19:42:58 +0000
@@ -1963,7 +1963,7 @@ AC_CHECK_HEADER(vis.h,
     [AC_DEFINE([HAVE_VIS_H], [1],[Found vis.h and the strvis() function])])])
 
 AC_CHECK_FUNCS(strlcat strlcpy)
-AC_CHECK_FUNCS(issetugid)
+AC_CHECK_FUNCS(issetugid getuid geteuid getgid getegid)
 AC_CHECK_FUNCS(fgetln)
 AC_CHECK_FUNCS(getline flockfile)
 


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