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Shell Programming and Scripting
Redirecting STDERR to file and screen, STDOUT only to file
Post 302698023 by Lem on Friday 7th of September 2012 06:43:11 PM
09-07-2012
Quote:
Just for the sake of curiosity, I was wondering whether we could try an ugly workaround (I know it's at least ugly): if GNU ls splits too much its error messages, what about a little pause between ls and tee?
It seems to work. Here below the count of "nonefile"s gives us the number of
broken logs:
Code:
$ for i in {1..1000}; do { exec 3>&1; ls file none 2>&1 1>&3 | tee -a /dev/null; } |grep nonefile; done |wc -l
56Code:
for i in {1..100}; do { exec 3>&1; ls file none 2>&1 1>&3 | { sleep 1; tee -a /dev/null; }; } |grep nonefile; done |wc -l
0BTW: of course, if one doesn't care at all about having all the errors at the beginning or at the end of the log, a solution is obvious:
Code:
command 2>&1 >logfile | tee -a error; cat error >>logfile
Code:
command 2>&1 >output | tee -a logfile; cat output >>logfile
--
Bye
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LEARN ABOUT LINUX
tee
TEE(1) User Commands TEE(1) NAME
tee - read from standard input and write to standard output and files SYNOPSIS
tee [OPTION]... [FILE]... DESCRIPTION
Copy standard input to each FILE, and also to standard output. -a, --append append to the given FILEs, do not overwrite -i, --ignore-interrupts ignore interrupt signals --help display this help and exit --version output version information and exit If a FILE is -, copy again to standard output. AUTHOR
Written by Mike Parker, Richard M. Stallman, and David MacKenzie. REPORTING BUGS
Report tee bugs to bug-coreutils@gnu.org GNU coreutils home page: <http://www.gnu.org/software/coreutils/> General help using GNU software: <http://www.gnu.org/gethelp/> Report tee translation bugs to <http://translationproject.org/team/> COPYRIGHT
Copyright (C) 2010 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO
The full documentation for tee is maintained as a Texinfo manual. If the info and tee programs are properly installed at your site, the command info coreutils 'tee invocation' should give you access to the complete manual. GNU coreutils 8.5 February 2011 TEE(1)