Hi,
am trying to pipe output from time command and output from a shell script to the mail program. So far it's not working as expected...
# time echo "test" 2>&1 | mail -s "timetest" my@mail.com
real 0m0.126s user 0m0.000s sys 0m0.000s
The time command writes to stderror, but here the redirection seems to apply to the echo command?
Thx Rainer
Rainer Traut wrote:
Hi,
am trying to pipe output from time command and output from a shell script to the mail program. So far it's not working as expected...
# time echo "test" 2>&1 | mail -s "timetest" my@mail.com
real 0m0.126s user 0m0.000s sys 0m0.000s
The time command writes to stderror, but here the redirection seems to apply to the echo command?
Try `time echo "test"` etc. That way, it executes in a subshell, and has one STDOUT and STDERR.
mark
Am 23.11.2010 15:30, schrieb m.roth@5-cent.us:
Rainer Traut wrote:
Hi,
am trying to pipe output from time command and output from a shell script to the mail program. So far it's not working as expected...
# time echo "test" 2>&1 | mail -s "timetest" my@mail.com
real 0m0.126s user 0m0.000s sys 0m0.000s
The time command writes to stderror, but here the redirection seems to apply to the echo command?
Try `time echo "test"` etc. That way, it executes in a subshell, and has one STDOUT and STDERR.
Ok, yes this works.
Thx Rainer
On Tue, Nov 23, 2010 at 05:04:09PM +0100, Rainer Traut wrote:
Am 23.11.2010 15:30, schrieb m.roth@5-cent.us:
Rainer Traut wrote:
am trying to pipe output from time command and output from a shell script to the mail program. So far it's not working as expected...
# time echo "test" 2>&1 | mail -s "timetest" my@mail.com
The time command writes to stderror, but here the redirection seems to apply to the echo command?
Try `time echo "test"` etc. That way, it executes in a subshell, and has one STDOUT and STDERR.
Ok, yes this works.
The problem you're coming across is that "time" is a shell built-in and not an external, so the shell is parsing "time foo 2>&1" as if it was something similar to "time (foo 2>&1)".
The two common solutions are: 1) explicitly use /usr/bin/time - eg /usr/bin/time -p foo 2>&1
2) force a subshell - eg (time foo) 2>&1
-
m.roth＠5-cent.us -
Rainer Traut -
Stephen Harris