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110 lines
3.4 KiB
110 lines
3.4 KiB
BASH PATCH REPORT
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=================
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Bash-Release: 4.3
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Patch-ID: bash43-025
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Bug-Reported-by: Stephane Chazelas <stephane.chazelas@gmail.com>
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Bug-Reference-ID:
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Bug-Reference-URL:
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Bug-Description:
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Under certain circumstances, bash will execute user code while processing the
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environment for exported function definitions.
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Patch (apply with `patch -p0'):
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--- a/builtins/common.h
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+++ b/builtins/common.h
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@@ -33,6 +33,8 @@
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#define SEVAL_RESETLINE 0x010
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#define SEVAL_PARSEONLY 0x020
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#define SEVAL_NOLONGJMP 0x040
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+#define SEVAL_FUNCDEF 0x080 /* only allow function definitions */
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+#define SEVAL_ONECMD 0x100 /* only allow a single command */
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/* Flags for describe_command, shared between type.def and command.def */
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#define CDESC_ALL 0x001 /* type -a */
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--- a/builtins/evalstring.c
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+++ b/builtins/evalstring.c
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@@ -308,6 +308,14 @@ parse_and_execute (string, from_file, fl
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{
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struct fd_bitmap *bitmap;
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+ if ((flags & SEVAL_FUNCDEF) && command->type != cm_function_def)
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+ {
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+ internal_warning ("%s: ignoring function definition attempt", from_file);
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+ should_jump_to_top_level = 0;
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+ last_result = last_command_exit_value = EX_BADUSAGE;
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+ break;
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+ }
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+
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bitmap = new_fd_bitmap (FD_BITMAP_SIZE);
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begin_unwind_frame ("pe_dispose");
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add_unwind_protect (dispose_fd_bitmap, bitmap);
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@@ -368,6 +376,9 @@ parse_and_execute (string, from_file, fl
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dispose_command (command);
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dispose_fd_bitmap (bitmap);
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discard_unwind_frame ("pe_dispose");
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+
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+ if (flags & SEVAL_ONECMD)
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+ break;
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}
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}
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else
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--- a/variables.c
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+++ b/variables.c
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@@ -358,13 +358,11 @@ initialize_shell_variables (env, privmod
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temp_string[char_index] = ' ';
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strcpy (temp_string + char_index + 1, string);
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- if (posixly_correct == 0 || legal_identifier (name))
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- parse_and_execute (temp_string, name, SEVAL_NONINT|SEVAL_NOHIST);
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-
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- /* Ancient backwards compatibility. Old versions of bash exported
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- functions like name()=() {...} */
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- if (name[char_index - 1] == ')' && name[char_index - 2] == '(')
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- name[char_index - 2] = '\0';
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+ /* Don't import function names that are invalid identifiers from the
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+ environment, though we still allow them to be defined as shell
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+ variables. */
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+ if (legal_identifier (name))
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+ parse_and_execute (temp_string, name, SEVAL_NONINT|SEVAL_NOHIST|SEVAL_FUNCDEF|SEVAL_ONECMD);
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if (temp_var = find_function (name))
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{
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@@ -381,10 +379,6 @@ initialize_shell_variables (env, privmod
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last_command_exit_value = 1;
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report_error (_("error importing function definition for `%s'"), name);
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}
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-
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- /* ( */
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- if (name[char_index - 1] == ')' && name[char_index - 2] == '\0')
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- name[char_index - 2] = '('; /* ) */
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}
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#if defined (ARRAY_VARS)
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# if ARRAY_EXPORT
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--- a/subst.c
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+++ b/subst.c
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@@ -8047,7 +8047,9 @@ comsub:
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goto return0;
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}
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- else if (var = find_variable_last_nameref (temp1))
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+ else if (var && (invisible_p (var) || var_isset (var) == 0))
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+ temp = (char *)NULL;
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+ else if ((var = find_variable_last_nameref (temp1)) && var_isset (var) && invisible_p (var) == 0)
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{
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temp = nameref_cell (var);
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#if defined (ARRAY_VARS)
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--- a/patchlevel.h
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+++ b/patchlevel.h
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@@ -25,6 +25,6 @@
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regexp `^#define[ ]*PATCHLEVEL', since that's what support/mkversion.sh
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looks for to find the patch level (for the sccs version string). */
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-#define PATCHLEVEL 24
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+#define PATCHLEVEL 25
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#endif /* _PATCHLEVEL_H_ */
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