I am using the time command in a script however the output of the time command will display on my screen but not my output file. Any Ideas on how to fix this?
> cat test.sh
#############################
#!/usr/bin/sh
for COMMAND in pwd
do
time ${COMMAND}
done | sed "s/^/ ... (4 Replies)
I am using ksh on an AIX box.
I would like to redirect the stdout and stderr to a file but also show them on the terminal. Is this possible? I have tried tee within my file without success.
This is the code I have so far
exec > imp.log 2>&1 | tee exec 1>&1
I am new to shell scripting, so... (3 Replies)
exam is a ksh script. In command line I enter: exam 3 param_2 param_3 param_4.
In exam how can I get the value of the parameter which position is specified by the first argument.
Simply doing this DOES NOT work:
offset=$1
value=$$offset
can you figure out any possible way to interpret a... (5 Replies)
Hello all,
I have a script that I am trying to execute and redirect the output to a file, but I have trouble in redirection. The cron job is running properly as I see it in the mail.
This is what I am doing
In crontab file,
0 4 * * * somescript.sh > /some_location/`date '+%m%d%y_%H%M'`.log... (9 Replies)
Hi,
I need to create one KSH which will send mail to set of recipients using "mailx" command like below.
mailx -s "Test mail" "test@yahoo.com, test@gmail.com" <$output.txt
The recipients are in different domains (like yahoo, gmail, etc.).
My requirement is, if any mail is undelivered,... (1 Reply)
Hi,
I have perl script which is calling an external command using "system()" with argument.
But i am not able to capture the output.Even tried with backtick also with no luck.
.
.
$number=<>;
system ("cmd $number >output.txt"); (2 Replies)
Hello,
i'm trying to implement the times() function and i'm programming in C.
I'm using the "struct tms" structure which consists of the fields:
The tms_utime structure member is the CPU time charged for the execution of user instructions of the calling process.
The tms_stime structure... (1 Reply)
I have a script to send an email like below. Problem is, the if ..fi block is not getting executed, and is coming as a part of the email body. Can anyone take a look at this? :confused:
Log file shows this:
SEND_MAIL.prog: line 64:
: command not found
echo "Input Parameters"
echo... (11 Replies)
Hello all,
I would like to create a for loop or whatever is quick that will print the one’s place of a number for 1-N times
say for example a printed page formatting is 132 characters wide,
I would like a single line
123456789012345678901234567890... ...012
That is 132 characters long. I... (11 Replies)
Hi
Please can you help how do I count the number of specific characters or words that appear in a file? (8 Replies)
Discussion started by: fretagi
8 Replies
LEARN ABOUT DEBIAN
unbuffer
UNBUFFER(1) General Commands Manual UNBUFFER(1)NAME
unbuffer - unbuffer output
SYNOPSIS
unbuffer program [ args ]
INTRODUCTION
unbuffer disables the output buffering that occurs when program output is redirected from non-interactive programs. For example, suppose
you are watching the output from a fifo by running it through od and then more.
od -c /tmp/fifo | more
You will not see anything until a full page of output has been produced.
You can disable this automatic buffering as follows:
unbuffer od -c /tmp/fifo | more
Normally, unbuffer does not read from stdin. This simplifies use of unbuffer in some situations. To use unbuffer in a pipeline, use the
-p flag. Example:
process1 | unbuffer -p process2 | process3
CAVEATS
unbuffer -p may appear to work incorrectly if a process feeding input to unbuffer exits. Consider:
process1 | unbuffer -p process2 | process3
If process1 exits, process2 may not yet have finished. It is impossible for unbuffer to know long to wait for process2 and process2 may
not ever finish, for example, if it is a filter. For expediency, unbuffer simply exits when it encounters an EOF from either its input or
process2.
In order to have a version of unbuffer that worked in all situations, an oracle would be necessary. If you want an application-specific
solution, workarounds or hand-coded Expect may be more suitable. For example, the following example shows how to allow grep to finish pro-
cessing when the cat before it finishes first. Using cat to feed grep would never require unbuffer in real life. It is merely a place-
holder for some imaginary process that may or may not finish. Similarly, the final cat at the end of the pipeline is also a placeholder
for another process.
$ cat /tmp/abcdef.log | grep abc | cat
abcdef
xxxabc defxxx
$ cat /tmp/abcdef.log | unbuffer grep abc | cat
$ (cat /tmp/abcdef.log ; sleep 1) | unbuffer grep abc | cat
abcdef
xxxabc defxxx
$
BUGS
The man page is longer than the program.
SEE ALSO
"Exploring Expect: A Tcl-Based Toolkit for Automating Interactive Programs" by Don Libes, O'Reilly and Associates, January 1995.
AUTHOR
Don Libes, National Institute of Standards and Technology
1 June 1994 UNBUFFER(1)