BASH PATCH REPORT ================= Bash-Release: 2.05b Patch-ID: bash205b-008 Bug-Reported-by: Stephane Chazelas 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: *** ../bash-2.05b.07/builtins/common.h 2002-05-10 12:25:08.000000000 -0400 --- builtins/common.h 2014-09-25 10:18:20.000000000 -0400 *************** *** 33,36 **** --- 33,38 ---- /* 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-2.05b.07/builtins/evalstring.c 2002-04-04 13:38:50.000000000 -0500 --- builtins/evalstring.c 2014-09-25 10:18:20.000000000 -0400 *************** *** 205,208 **** --- 205,216 ---- 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"); *************** *** 256,259 **** --- 264,270 ---- dispose_fd_bitmap (bitmap); discard_unwind_frame ("pe_dispose"); + + if (flags & SEVAL_ONECMD) + break; } } *** ../bash-2.05b.07/variables.c 2002-06-25 09:43:33.000000000 -0400 --- variables.c 2014-09-25 10:18:20.000000000 -0400 *************** *** 270,279 **** 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)) --- 270,277 ---- 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)) *************** *** 284,291 **** 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) --- 282,285 ----