src/bin/sh/eval.c, branch release/7.0.0_cvs

This commit was manufactured by cvs2svn to create tag

2008-02-24T05:45:17+00:00

'RELENG_7_0_0_RELEASE'.

This commit was manufactured to restore the state of the 7.0-RELEASE image.

The exit status of a case statement where none of the patterns is matched

2007-10-04T16:14:48+00:00

is supposed to be 0, not the status of the previous command.

Reported by:	Eygene Ryabinkin
PR:		116559
Approved by:	re (gnn)

Merge NetBSD's revision 1.86: Don't crash on " | { }".

2006-06-15T07:57:05+00:00

Implement the PS4 variable which is defined by the POSIX User Portability

2006-06-15T07:00:49+00:00

Utilities option.  Its value is printed at the beginning of the line if tracing
(-x) is active.  PS4 defaults to the string "+ " which is compatible with the
old behaviour to always print "+ ".

We still need to expand variables in PS1, PS2 and PS4.

PR:		46441 (part of)
Submitted by:	schweikh
Obtained from:	NetBSD

Implement some of the differences between special built-ins and other builtins

2006-04-09T12:21:20+00:00

demanded by POSIX.
- A redirection error is only fatal (meaning the execution of a shell script is
  terminated) for special built-ins.  Previously it was fatal for all shell
  builtins, causing problems like the one reported in PR 88845.
- Variable assignments remain in effect for special built-ins.
- Option or operand errors are only fatal for special built-ins.
This change also makes errors from 'fc' non-fatal (I could not find any reasons
for this behaviour).

Somewhat independently from the above down-grade the error handling in the
shift built-in if the operand is bigger than $# from an error() call (which is
now fatal) to a return 1.  I'm not sure if this should be considered a POSIX
"operand error", however this change is needed for now as we trigger that error
while building libncurses.  Comparing with other shells, zsh does the same as
our sh before this change (write a diagnostic, return 1), bash behaves as our
sh after this commit (no diagnostic, return 1) and ksh93 and NetBSD's sh treat
it as a fatal error.

Remove some white space at EOL.

2006-02-04T14:37:50+00:00

Add the times builtin. It reports the user and system time for the shell

2005-12-04T18:44:21+00:00

itself and its children.  Instead of calling times() (as implied by POSIX) this
implementation directly calls getrusage() to get the times because this is more
convenient.

Add the POSIX options -v and -V to the 'command' builtin. Both describe the

2005-10-28T18:37:09+00:00

type of their argument, if it is a shell function, an alias, a builtin, etc.
-V is more verbose than -v.

PR:	77259, 84539

Pass the EV_TESTED flag to evalloop() and evalfor(). This fixes unwanted

2005-09-10T08:25:28+00:00

termination with set -e if a command fails in a loop body inside a function
with an explicitely tested exit status, eg

	f() {
		for i in 1 2 3; do
			false
		done
	}
	f || true

Briefly reviewed by:	cracauer

Pass the EV_TESTED flag to the left operand of NSEMI nodes. This fixes

2005-09-10T08:19:58+00:00

two cases of unwanted termination with set -e:

* if-commands containing several commands separated by semicolons, eg

	if false; false; then [...]

* functions with an explicitely tested exit status that contain a failing
  command which is not the last one, eg

	f() {
		false
		false
	}
	f || true

PR:	77067, 85267
Briefly reviewed by:	cracauer