BASH PATCH REPORT
=================
Bash-Release: 4.0
Patch-ID: bash40-028
Bug-Reported-by: martin f krafft <
[email protected]>
Bug-Reference-ID: <
[email protected]>
Bug-Reference-URL:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=519165
http://lists.gnu.org/archive/html/bug-bash/2009-07/msg00011.html
Bug-Description:
bash-4.0 reverted to the historical shell behavior of raising an error
when $@ or $* was expanded after `set -u' had been executed and there
were no positional parameters. The Posix working group has since
clarified the standard's position on the issue, and $@ and $* are now the
only variables, parameters, or special parameters that do not raise an
error when unset if set -u is enabled.
Patch:
*** ../bash-4.0-patched/subst.c Mon Mar 23 11:34:55 2009
--- subst.c Wed Jun 17 18:12:18 2009
***************
*** 6768,6778 ****
case RBRACE:
! if (var_is_set == 0 && unbound_vars_is_error)
{
err_unboundvar (name);
FREE (value);
FREE (temp);
free (name);
- last_command_exit_value = EXECUTION_FAILURE;
return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal);
}
--- 6794,6804 ----
case RBRACE:
! if (var_is_set == 0 && unbound_vars_is_error && ((name[0] != '@' && name[0] != '*') || name[1]))
{
+ last_command_exit_value = EXECUTION_FAILURE;
err_unboundvar (name);
FREE (value);
FREE (temp);
free (name);
return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal);
}
***************
*** 6991,6994 ****
--- 7017,7029 ----
list = list_rest_of_args ();
+ #if 0
+ /* According to austin-group posix proposal by Geoff Clare in
+ <
[email protected]> of 5 May 2009:
+
+ "The shell shall write a message to standard error and
+ immediately exit when it tries to expand an unset parameter
+ other than the '@' and '*' special parameters."
+ */
+
if (list == 0 && unbound_vars_is_error && (pflags & PF_IGNUNBOUND) == 0)
{
***************
*** 6996,7003 ****
uerror[1] = '*';
uerror[2] = '\0';
- err_unboundvar (uerror);
last_command_exit_value = EXECUTION_FAILURE;
return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal);
}
/* If there are no command-line arguments, this should just
--- 7031,7039 ----
uerror[1] = '*';
uerror[2] = '\0';
last_command_exit_value = EXECUTION_FAILURE;
+ err_unboundvar (uerror);
return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal);
}
+ #endif
/* If there are no command-line arguments, this should just
***************
*** 7053,7056 ****
--- 7089,7101 ----
list = list_rest_of_args ();
+ #if 0
+ /* According to austin-group posix proposal by Geoff Clare in
+ <
[email protected]> of 5 May 2009:
+
+ "The shell shall write a message to standard error and
+ immediately exit when it tries to expand an unset parameter
+ other than the '@' and '*' special parameters."
+ */
+
if (list == 0 && unbound_vars_is_error && (pflags & PF_IGNUNBOUND) == 0)
{
***************
*** 7058,7065 ****
uerror[1] = '@';
uerror[2] = '\0';
- err_unboundvar (uerror);
last_command_exit_value = EXECUTION_FAILURE;
return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal);
}
/* We want to flag the fact that we saw this. We can't turn
--- 7103,7111 ----
uerror[1] = '@';
uerror[2] = '\0';
last_command_exit_value = EXECUTION_FAILURE;
+ err_unboundvar (uerror);
return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal);
}
+ #endif
/* We want to flag the fact that we saw this. We can't turn
*** ../bash-4.0-patched/doc/bash.1 Wed Feb 18 15:13:56 2009
--- doc/bash.1 Wed Jun 17 08:51:19 2009
***************
*** 8258,8264 ****
.TP 8
.B \-u
! Treat unset variables as an error when performing
parameter expansion. If expansion is attempted on an
! unset variable, the shell prints an error message, and,
if not interactive, exits with a non-zero status.
.TP 8
--- 8274,8281 ----
.TP 8
.B \-u
! Treat unset variables and parameters other than the special
! parameters "@" and "*" as an error when performing
parameter expansion. If expansion is attempted on an
! unset variable or parameter, the shell prints an error message, and,
if not interactive, exits with a non-zero status.
.TP 8
*** ../bash-4.0-patched/doc/bashref.texi Wed Feb 18 15:14:43 2009
--- doc/bashref.texi Wed Jun 17 08:50:46 2009
***************
*** 4139,4143 ****
@item -u
! Treat unset variables as an error when performing parameter expansion.
An error message will be written to the standard error, and a non-interactive
shell will exit.
--- 4151,4156 ----
@item -u
! Treat unset variables and parameters other than the special parameters
! @samp{@@} or @samp{*} as an error when performing parameter expansion.
An error message will be written to the standard error, and a non-interactive
shell will exit.
*** ../bash-4.0/patchlevel.h 2009-01-04 14:32:40.000000000 -0500
--- patchlevel.h 2009-02-22 16:11:31.000000000 -0500
***************
*** 26,30 ****
looks for to find the patch level (for the sccs version string). */
! #define PATCHLEVEL 27
#endif /* _PATCHLEVEL_H_ */
--- 26,30 ----
looks for to find the patch level (for the sccs version string). */
! #define PATCHLEVEL 28
#endif /* _PATCHLEVEL_H_ */
