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Top Forums UNIX for Dummies Questions & Answers redirected output not going to file for all cases Post 302138102 by reborg on Friday 28th of September 2007 06:05:17 PM
Old 09-28-2007
I disagree:

Code:
#!/bin/ksh
#
# test.sh : demonstrate redirection
#
#
echo "I am stdout"
echo "I am stderr" >&2

Code:
# ./test.sh > log1
I am stderr
# cat log1
I am stdout

Code:
# ./test.sh 2>&1 > log2
I am stderr
# cat log2
I am stdout

Code:
# ./test.sh > log3 2>&1
# cat log3
I am stdout
I am stderr

The order of redirection is important because if the duplication happens from 2 to 1 before redirection of 1, error output is redirected to fd1 ( stdout ) and standard output is redirected elsewhere. On the other hand if it happens afterwards the duplication is to "the same place as standard output"
 

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GRC(1)							      General Commands Manual							    GRC(1)

NAME
grc - frontend for generic colouriser grcat(1) SYNOPSIS
grc [options] command [args] DESCRIPTION
grc will execute command command with optional parameters [args] piping its stdout or stderr into grcat, with apropriate configuration file. Configuration file for grc is determined by /etc/grc.conf file. Format of /etc/grc.conf: each entry consists of 2 lines, between entries there can be any number of empty lines or lines beginning with # (comments) First line is regular expression, second line the name of configuration file for grcat. Configuration file after the first regular expression matching command [args] will be passed to grcat as its configuration file OPTIONS
--help Show summary of options. --version Display version. -e --stderr Redirect error output. Unless -s is selected as well, this cancels redirection of standard output via grcat -s --stdout Redirect standard output. Used to redirect standard output together with --stderr option. --colour=x x is one of on off auto --colour=on will colourise (default) --colour=off will just execute command without colourising. --colour=auto will test if standard output is a tty, and colourise only when it is. SEE ALSO
grcat(1) AUTHOR
Written by Radovan Garabik <garabik @ kassiopeia.juls.savba.sk> GRC(1)
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