On Thu, 2009-12-10 at 22:20 -0500, Chet Ramey wrote:
>
> Nothing good.
Pity.
> The next version of bash will allow you specify an arbitrary
> file descriptor where the xtrace output will be written.
Cool. I wonder how long it will take the distros to pick that up
though. Sure, I could build
I'm wondering if anyone has any tricks to preserve stderr on
filedescriptor 2 and get xtrace output on a different file descriptor.
I've pulled hair trying to get the redirection right for this but just
come up with the right combination. I'd imagine it involves stashing
away fd 2, duplicating fd
On Wed, 2009-09-30 at 23:13 +0200, Andreas Schwab wrote:
>
> Just make sure the write side of the pipe is not closed prematurely.
Hrm. Yes, of course. John's solution of having a null writer keeping
it open is one way -- which I might just use.
> $ (n=0; while [ $n -lt 10 ]; do cat /dev/zero;
Let's say I have the following (contrived, simplified example):
$ mknod /tmp/fifo
$ cat /dev/zero > /tmp/fifo &
$ cat < /tmp/fifo
When the first cat exits (i.e. is terminated) the second cat stops. The
problem is that I want to be able to restart the first cat and have the
second cat just keep r
I'm trying to write a "stack trace" function and BASH_LINENO doesn't
make sense sometimes and doesn't appear too accurate at others.
Here's my test script:
shopt -s extdebug
trap 'backtrace' ERR
set -E
backtrace() {
echo "FUNCNAME: ${funcna...@]}"
echo "BASH_SOURCE: ${bash_sour...@]}"
On Thu, 2009-03-05 at 13:47 -0500, Greg Wooledge wrote:
>
> That might be a little more heavy-handed than you were looking for,
> but since you're already hitting /tmp it shouldn't be terrible to add
> a FIFO there.
Yeah. I really didn't want to use a named pipe for this.
Thanx for the help tho
Hi,
I want to effect this pipeline:
tar cf - /etc | tar xf - | tee /tmp/outfile
manually. It seems that some form of file descriptor manipulation (i.e.
moving, duplication, etc.) should be able to achieve this, but I can't
seem to figure it out.
Why would I want to do this? Because I want (sp
On Mon, 2008-09-22 at 20:44 +0100, Richard Neill wrote:
>
How about...
> ---
> #!/bin/bash
>
> #initialisation stuff goes here.
>
if false; then
>
> #lots of stuff here that I want to skip.
> #Bash doesn't have a multi-line comment feature.
> #Even if it did, one can't do a mu
On Wed, 2008-02-13 at 16:00 -0500, Brian J. Murrell wrote:
>
> find / -type f -print 2>&1 | head -20 || true
Doh!
This of course won't work. The first solution should though.
b.
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On Wed, 2008-02-13 at 14:56 -0600, Michael Potter wrote:
> Bash Bunch,
>
> I googled a bit and it see this problem asked several times, but I
> never really saw a slick solution:
>
> given this:
>
> set -o pipefail
> find / -type f -print 2>&1 |head -20
> echo ${PIPESTATUS[*]}
>
> prints this:
I am trying to write a function to (wall-clock) timelimit a command's
execution time but damned if I cannot eliminate all of the races.
Here is my current iteration of the function:
1 timed_run() {
2local SLEEP_TIME=$1
3shift
4
5set +o monitor
6
7# start command running
8
to illustrate that the cat should exit
here
exec 3>&-
while [ -f foo ]; do
sleep 1
done
exit
But it's just so ugly.
For what it's worth, the process in the substitution is expect and what
I am feeding it from the script is an expect script
k I was purely considering the cost of fork/exec.
In any case, dead horses and all.
b.
--
My other computer is your Microsoft Windows server.
Brian J. Murrell
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On Sat, 2007-02-03 at 23:30 -0500, Paul Jarc wrote:
> "Brian J. Murrell" <[EMAIL PROTECTED]> wrote:
> > < <(cat $file)
>
> http://partmaps.org/era/unix/award.html
LOL. Too right. I am just so used to using process redirection to
solve the old "but my
1 rest; do
echo $column1
done
Or if you need the data in the calling shell's context:
while read column1 rest; do
# the goodies are in $column1
done < <(cat $file)
Probably a dozen other ways to do it too.
b.
--
My other computer is your Microsoft Windows server.
Brian J. Murre
ND' ERR
$ false
false
given the explanation in the manpage.
I must be misunderstanding something.
b.
--
My other computer is your Microsoft Windows server.
Brian J. Murrell
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rintf (xtrace_stream, "%s", (arg2 && *arg2) ? arg2 : "''");
}
- fprintf (stderr, " ]]\n");
+ fprintf (xtrace_stream, " ]]\n");
+ fflush (xtrace_stream);
}
#endif /* COND_COMMAND */
@@ -785,11 +825,12 @@
{
WORD_LIST *
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