The 'exec' command can be used to reopen file descriptors, letting you point them wherever you please. Here I feed stdout into a fifo, so tee can read it.
Code:
#!/bin/bash
# Create a fifo
mkfifo /tmp/$$
# Create a background process to read it
tee out.log < /tmp/$$ &
# Redirect stdout into it
exec 1>/tmp/$$
# Uncomment this line to capture stderr as well.
# exec 1>&2
# Delete the fifo now, before we forget
rm /tmp/$$
for ((N=0; N<100; N++))
do
echo "$N"
done
# close stdout
exec 1>&-
# close stderr too if you redirected it
# exec 2>&-
# wait for tee to quit
wait
I'm working on a script that will perform a backup, save a log of said backup and send the output to me in an email. Everything is working fine so far except that I can't figure out how to specify a maximum file size for the log file. I don't want a runaway log file jamming up the server.... (7 Replies)
Hi,
I am running my script using nohup, but I am not able to capture the log file for that process could naybody please help...
Here is what I am doing....
nohup ./script & 1>/home/user1/log.txt
but I am not able to capture the log.....Is there anyother way I can capture the log... (2 Replies)
Hi ,
I have seen some log files where they have captured the command that is being executed, comments present in the scripts and the out put of the command as well, through scripts. could any one of you please let me know how do i do that?
Thanks in advance.
Cheers,
Waseem (4 Replies)
Hi All :
I wanted a unix command by which I could be able to print the output to a file and at the same time to a printer. Any help will be greatly appreciated.
Regards,
Ramamurthy Dasari (1 Reply)
Hello,
If I run a program from within shell, the output is displayed in the command line terminal. Is there a way I can capture that output and choose only the very last string in it to send it to a new file?
Thank you (6 Replies)
Hi,
I am running a shell script called dbProcess.sh which performs shutdown and startup of various Oracle instances we have.At the time of execution the script produces the following output to the command line window
$./dbProcess.sh stop
#### Run Details ######
Hostname : server-hop-1... (4 Replies)
Hi
I have a requirement to write a script to capture all errors in a Logfile and send the file in email.
If there is any error occurred the subject of email will be ERROR , If there are no error occurred the subject of email will be SUCCESS.
So I created a Log file and put the Appropriate... (2 Replies)
I want to capture the debug for the below command in output file .
i tried like this but its not working:
sh -xv <scriptname> >> output.log
i want the output in a log file.
Anyone plz help in this (2 Replies)
Hi,
I am trying to capture the output of the an open pipe in perl. but I am not sure how to do this. can some one please help me do that?
Below is the script I am using (2 Replies)
Dear all,
I have a log file to be analysed. this log file contains vaiours lines of code starting with date timestamp.
if my search string is exception then that resepective log statement starting from the date is required.
example:
2014/10/01 16:14:44.459|>=|E|X|19202496|2832|... (5 Replies)
Discussion started by: shravee
5 Replies
LEARN ABOUT X11R4
script
SCRIPT(1) User Commands SCRIPT(1)NAME
script - make typescript of terminal session
SYNOPSIS
script [options] [file]
DESCRIPTION
script makes a typescript of everything displayed on your terminal. It is useful for students who need a hardcopy record of an interactive
session as proof of an assignment, as the typescript file can be printed out later with lpr(1).
If the argument file is given, script saves the dialogue in this file. If no filename is given, the dialogue is saved in the file type-
script.
OPTIONS -a, --append
Append the output to file or to typescript, retaining the prior contents.
-c, --command command
Run the command rather than an interactive shell. This makes it easy for a script to capture the output of a program that behaves
differently when its stdout is not a tty.
-e, --return
Return the exit code of the child process. Uses the same format as bash termination on signal termination exit code is 128+n.
-f, --flush
Flush output after each write. This is nice for telecooperation: one person does `mkfifo foo; script -f foo', and another can
supervise real-time what is being done using `cat foo'.
--force
Allow the default output destination, i.e. the typescript file, to be a hard or symbolic link. The command will follow a symbolic
link.
-q, --quiet
Be quiet (do not write start and done messages to standard output).
-t[file], --timing[=file]
Output timing data to standard error, or to file when given. This data contains two fields, separated by a space. The first field
indicates how much time elapsed since the previous output. The second field indicates how many characters were output this time.
This information can be used to replay typescripts with realistic typing and output delays.
-V, --version
Display version information and exit.
-h, --help
Display help text and exit.
NOTES
The script ends when the forked shell exits (a control-D for the Bourne shell (sh(1)), and exit, logout or control-d (if ignoreeof is not
set) for the C-shell, csh(1)).
Certain interactive commands, such as vi(1), create garbage in the typescript file. script works best with commands that do not manipulate
the screen, the results are meant to emulate a hardcopy terminal.
It is not recommended to run script in non-interactive shells. The inner shell of script is always interactive, and this could lead to
unexpected results. If you use script in the shell initialization file, you have to avoid entering an infinite loop. You can use for
example the .profile file, which is read by login shells only:
if test -t 0 ; then
script
exit
fi
You should also avoid use of script in command pipes, as script can read more input than you would expect.
ENVIRONMENT
The following environment variable is utilized by script:
SHELL If the variable SHELL exists, the shell forked by script will be that shell. If SHELL is not set, the Bourne shell is assumed.
(Most shells set this variable automatically).
SEE ALSO csh(1) (for the history mechanism), scriptreplay(1)HISTORY
The script command appeared in 3.0BSD.
BUGS
script places everything in the log file, including linefeeds and backspaces. This is not what the naive user expects.
script is primarily designed for interactive terminal sessions. When stdin is not a terminal (for example: echo foo | script), then the
session can hang, because the interactive shell within the script session misses EOF and script has no clue when to close the session. See
the NOTES section for more information.
AVAILABILITY
The script command is part of the util-linux package and is available from Linux Kernel Archive <https://www.kernel.org/pub/linux/utils
/util-linux/>.
util-linux June 2014 SCRIPT(1)