Sponsored Content
Full Discussion: Redirecting stdout problem
Top Forums Shell Programming and Scripting Redirecting stdout problem Post 302659307 by igurov on Wednesday 20th of June 2012 04:52:57 PM
Old 06-20-2012
Redirecting stdout problem

I have a simple bash script that prints sth every 5 seconds. What I do is the following. I redirect the output of the script to a file, tail the file and see that it works and then from another console I delete the file where the output is redirected to. Even though I have deleted the file, the tail still works. Stoping the tail and starting it again of course fails because the file is not found.
My question is whether this is normal and does the output go "somewhere" after deleting the file where it is supposed to be redirected.

Best,
Iliya
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

redirecting STDOUT & STDERR

In bash, I need to send the STDOUT and STDERR from a command to one file, and then just STDERR to another file. Doing one or the other using redirects is easy, but trying to do both at once is a bit tricky. Anyone have any ideas? (9 Replies)
Discussion started by: jshinaman
9 Replies

2. Shell Programming and Scripting

implicitly redirecting stdout to a file

Is there a way to redirect all stdout to a file implicitly - like defining stdout=/home/me/process.log - so that all "echo" commands in several scripts/subscripts are written to that file; instead of having to edit all scripts to redirect the "echo" (e.g. echo 'This is a test ' >>... (1 Reply)
Discussion started by: ALTRUNVRSOFLN
1 Replies

3. Shell Programming and Scripting

Redirecting part of output to stdout

Hi, I am trying to execute a command like this: find ./ -name "*.gz" -exec sh -c 'zcat {} | awk -f parse.awk' \; >> output If I want to print the filename, i generally use the -print argument to the find command but when I am redirecting the output to a file, how can I print just the... (2 Replies)
Discussion started by: Legend986
2 Replies

4. UNIX for Dummies Questions & Answers

Redirecting several outputs to /dev/stdout

I have an executable that, depending on its input, outputs to either one file or several. It usually prints nothing on screen. The usual way to call this program is to specify an input and output filenames, like this: ./executable.exe -i inputfile -o outputfileIt will then try to use the output... (1 Reply)
Discussion started by: aplaydoc
1 Replies

5. Shell Programming and Scripting

redirecting to stdout in betwen command

can anyone help me in making singleline command for Capital Letters are folders ,small letter are files X,Y,Z are subfolders of A as shown below A - X,Y,Z Folder X has three files a.txt,b.txt,c.txt similarly Y,Z. as shown below X- a.txt,b.txt,c.txt Y- a.txt,b.txt,c.txt Z-... (4 Replies)
Discussion started by: phoenix_nebula
4 Replies

6. Shell Programming and Scripting

Redirecting stdout to variable while printing it

Hi everybody, I am trying to do the thing you see in the title, and I can't simply do a=$(svn up) echo $a because the program (svn) gives output on lots of lines and in the variable the output is stored on only one line (resulting in a horribly formatted text). Any tips? Thanks,... (2 Replies)
Discussion started by: ocirne94
2 Replies

7. Shell Programming and Scripting

Redirecting stdout on background task

Hello, I have a script (videostream.sh) which invokes the GStreamer command-line tool gst-launch with all the correct command line parameters. When I invoke this program, I add the '&' character at the end to make it a background task, so that my script can complete and exit, i.e. gst-launch... (1 Reply)
Discussion started by: salukibob
1 Replies

8. Shell Programming and Scripting

Redirecting stdout continously to a file

I have a C program that continously outputs info to stdout. The problem is that I am redirecting the stdout and stderr to a file and stdout is written at the end of the problem rather than continously to the file. This could be a problem if for example the program is killed and the stdout output is... (3 Replies)
Discussion started by: igurov
3 Replies

9. Shell Programming and Scripting

Redirecting stdion, stdout within an AT command

Hello, I'm strugling with some redirecting and all help is apreciated. The following program is working as expected, but the result of the AT command doesn't go to any file. Thanks in advance for the help. #!/bin/bash modem=/dev/ttyUSB1 file=/root/imsi.txt # print error to stderr and exit... (4 Replies)
Discussion started by: cleitao
4 Replies

10. UNIX for Dummies Questions & Answers

Redirecting stdout inside a loop

hi, OK. I am writing a bash script, and it is almost working for me. Problem 1: I currently have stout sent to a file (stout.miRNA.bash.$date_formatted) which I would like to have work inside my loop, but when I move it, it just prints to the screen. Problem 2: I have a second file... (18 Replies)
Discussion started by: hmortens
18 Replies
TAIL(1) 								FSF								   TAIL(1)

NAME
tail - output the last part of files SYNOPSIS
tail [OPTION]... [FILE]... DESCRIPTION
Print the last 10 lines of each FILE to standard output. With more than one FILE, precede each with a header giving the file name. With no FILE, or when FILE is -, read standard input. Mandatory arguments to long options are mandatory for short options too. --retry keep trying to open a file even if it is inaccessible when tail starts or if it becomes inaccessible later -- useful only with -f -c, --bytes=N output the last N bytes -f, --follow[={name|descriptor}] output appended data as the file grows; -f, --follow, and --follow=descriptor are equivalent -F same as --follow=name --retry -n, --lines=N output the last N lines, instead of the last 10 --max-unchanged-stats=N with --follow=name, reopen a FILE which has not changed size after N (default 5) iterations to see if it has been unlinked or renamed (this is the usual case of rotated log files) --pid=PID with -f, terminate after process ID, PID dies -q, --quiet, --silent never output headers giving file names -s, --sleep-interval=S with -f, sleep for approximately S seconds (default 1.0) between iterations. -v, --verbose always output headers giving file names --help display this help and exit --version output version information and exit If the first character of N (the number of bytes or lines) is a `+', print beginning with the Nth item from the start of each file, other- wise, print the last N items in the file. N may have a multiplier suffix: b for 512, k for 1024, m for 1048576 (1 Meg). With --follow (-f), tail defaults to following the file descriptor, which means that even if a tail'ed file is renamed, tail will continue to track its end. This default behavior is not desirable when you really want to track the actual name of the file, not the file descrip- tor (e.g., log rotation). Use --follow=name in that case. That causes tail to track the named file by reopening it periodically to see if it has been removed and recreated by some other program. AUTHOR
Written by Paul Rubin, David MacKenzie, Ian Lance Taylor, and Jim Meyering. REPORTING BUGS
Report bugs to <bug-coreutils@gnu.org>. COPYRIGHT
Copyright (C) 2002 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU- LAR PURPOSE. SEE ALSO
The full documentation for tail is maintained as a Texinfo manual. If the info and tail programs are properly installed at your site, the command info tail should give you access to the complete manual. tail (coreutils) 4.5.3 February 2003 TAIL(1)
All times are GMT -4. The time now is 06:36 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy