			     BASH PATCH REPORT
			     =================

Bash-Release:	4.2
Patch-ID:	bash42-048

Bug-Reported-by:	Stephane Chazelas <stephane.chazelas@gmail.com>
Bug-Reference-ID:
Bug-Reference-URL:

Bug-Description:

Under certain circumstances, bash will execute user code while processing the
environment for exported function definitions.

Patch (apply with `patch -p0'):

*** ../bash-4.2.47/builtins/common.h	2010-05-30 18:31:51.000000000 -0400
--- ./builtins/common.h	2014-09-16 19:35:45.000000000 -0400
***************
*** 36,39 ****
--- 36,41 ----
  
  /* Flags for describe_command, shared between type.def and command.def */
+ #define SEVAL_FUNCDEF	0x080		/* only allow function definitions */
+ #define SEVAL_ONECMD	0x100		/* only allow a single command */
  #define CDESC_ALL		0x001	/* type -a */
  #define CDESC_SHORTDESC		0x002	/* command -V */
*** ../bash-4.2.47/builtins/evalstring.c	2010-11-23 08:22:15.000000000 -0500
--- ./builtins/evalstring.c	2014-09-16 19:35:45.000000000 -0400
***************
*** 262,265 ****
--- 262,273 ----
  	      struct fd_bitmap *bitmap;
  
+ 	      if ((flags & SEVAL_FUNCDEF) && command->type != cm_function_def)
+ 		{
+ 		  internal_warning ("%s: ignoring function definition attempt", from_file);
+ 		  should_jump_to_top_level = 0;
+ 		  last_result = last_command_exit_value = EX_BADUSAGE;
+ 		  break;
+ 		}
+ 
  	      bitmap = new_fd_bitmap (FD_BITMAP_SIZE);
  	      begin_unwind_frame ("pe_dispose");
***************
*** 322,325 ****
--- 330,336 ----
  	      dispose_fd_bitmap (bitmap);
  	      discard_unwind_frame ("pe_dispose");
+ 
+ 	      if (flags & SEVAL_ONECMD)
+ 		break;
  	    }
  	}
*** ../bash-4.2.47/variables.c	2011-03-01 16:15:20.000000000 -0500
--- ./variables.c	2014-09-16 19:35:45.000000000 -0400
***************
*** 348,357 ****
  	  strcpy (temp_string + char_index + 1, string);
  
! 	  parse_and_execute (temp_string, name, SEVAL_NONINT|SEVAL_NOHIST);
! 
! 	  /* Ancient backwards compatibility.  Old versions of bash exported
! 	     functions like name()=() {...} */
! 	  if (name[char_index - 1] == ')' && name[char_index - 2] == '(')
! 	    name[char_index - 2] = '\0';
  
  	  if (temp_var = find_function (name))
--- 348,355 ----
  	  strcpy (temp_string + char_index + 1, string);
  
! 	  /* Don't import function names that are invalid identifiers from the
! 	     environment. */
! 	  if (legal_identifier (name))
! 	    parse_and_execute (temp_string, name, SEVAL_NONINT|SEVAL_NOHIST|SEVAL_FUNCDEF|SEVAL_ONECMD);
  
  	  if (temp_var = find_function (name))
***************
*** 362,369 ****
  	  else
  	    report_error (_("error importing function definition for `%s'"), name);
- 
- 	  /* ( */
- 	  if (name[char_index - 1] == ')' && name[char_index - 2] == '\0')
- 	    name[char_index - 2] = '(';		/* ) */
  	}
  #if defined (ARRAY_VARS)
--- 360,363 ----
*** ../bash-4.2-patched/patchlevel.h	Sat Jun 12 20:14:48 2010
--- ./patchlevel.h	Thu Feb 24 21:41:34 2011
***************
*** 26,30 ****
     looks for to find the patch level (for the sccs version string). */
  
! #define PATCHLEVEL 47
  
  #endif /* _PATCHLEVEL_H_ */
--- 26,30 ----
     looks for to find the patch level (for the sccs version string). */
  
! #define PATCHLEVEL 48
  
  #endif /* _PATCHLEVEL_H_ */
