08-30-2012
Thanks for all the help guys
The pipe was the most suitable for what I wanted
Cheers
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi,
Currently I'm working on a lenghty script so I figured it would be useful to create a logfile so that output that is displayed on the users screen is also stored in the log file for later reference...... kinda like the whole point of a log file! Anyway, I was just wondering if there was an... (3 Replies)
Discussion started by: _Spare_Ribs_
3 Replies
2. UNIX for Dummies Questions & Answers
I am trying to write a script that will remove any line in 2 given text files
starting with '-'.
the output should be to the second file.
this is what I tried:
#!/bin/csh -f
cat $1 $2 | grep -v '^-' > $2
the problem is the after executing the script, file2 contains only the
lines from... (7 Replies)
Discussion started by: stewie griffin
7 Replies
3. Shell Programming and Scripting
hi :)
if condition >&- 2>&-
Can anybody explain the redirection in above command
Thanks in advance (1 Reply)
Discussion started by: jpriyank
1 Replies
4. Shell Programming and Scripting
I'm redirecting the output of a command to a logfile, however, if the user is on a terminal I would also like the output to be displayed on the screen.
tar tvf some_tarfile >Logfile
if the user is on a term then have the output to the Logfile and also be displayed on the screen at the same... (2 Replies)
Discussion started by: nck
2 Replies
5. Shell Programming and Scripting
Hi there
I have a script that runs but it outputs everything onto the screen instead of a file.
I've tried using the > outputfile.txt however all it does is dump the output to the screen and creates an outputfile.txt but doesn't put anything in that file.
Any help would be appreciated
... (6 Replies)
Discussion started by: kma07
6 Replies
6. Shell Programming and Scripting
We have an application here that does some table queries and then prints the result on screen. I do not have the code of this application (which i will just call "queryCommand"), but what it does is that you call it with some parameters and it prints some info about the query and then the... (5 Replies)
Discussion started by: jolateh
5 Replies
7. UNIX for Dummies Questions & Answers
Hello i am trying to write a script that will redirect the output to a certain file. Here is the code so far:
#!/bin/bash
ps -e | sort | more > psfile
When I execute the script nothing happens since i assume the output was redirected to the file called psfile. When I try to look at the... (1 Reply)
Discussion started by: mfruiz34
1 Replies
8. Shell Programming and Scripting
Hi,
I am using AIX server. I have a korn shell script where in I am redirecting a line to a file in a while loop:
while read line
do
outputline=$line;
echo $outputline >> "./temp/exec_list_"$ETL_JOB_RUN"_temp"
done < ./temp/exec_list_$ETL_JOB_RUN
Sometimes, when the CPU... (2 Replies)
Discussion started by: pmonika
2 Replies
9. Shell Programming and Scripting
Hi
I am making a script where i want to redirect the output of ls -l to a file
Example
#ls -l fil1.txt > /opt/temp/a.txt
ac: No such file or directory
I want to capture output of this command
like here output is
ac: No such file or directory
can anyone help (4 Replies)
Discussion started by: anish19
4 Replies
10. Shell Programming and Scripting
Hi All,
i have below for loop of which i am trying to redirect output in a file:
for i in `/usr/sbin/ifconfig -a | awk '/flags/ {print $1}' | grep -v lo | sed 's/://g'`
do
ifconfig $i dhcp status
done >> /tmp/logfile
but instead the output is appearing as stdout on screen rather than... (12 Replies)
Discussion started by: omkar.jadhav
12 Replies
PIPE(2) System Calls Manual PIPE(2)
NAME
pipe - create an interprocess channel
SYNOPSIS
#include <u.h>
#include <libc.h>
int pipe(int fd[2])
DESCRIPTION
Pipe creates a buffered channel for interprocess I/O communication. Two file descriptors are returned in fd. Data written to fd[1] is
available for reading from fd[0] and data written to fd[0] is available for reading from fd[1].
After the pipe has been established, cooperating processes created by subsequent fork(2) calls may pass data through the pipe with read and
write calls. The bytes placed on a pipe by one write are contiguous even if many processes are writing. Write boundaries are preserved:
each read terminates when the read buffer is full or after reading the last byte of a write, whichever comes first.
The number of bytes available to a read(2) is reported in the Length field returned by fstat or dirfstat on a pipe (see stat(2)).
When all the data has been read from a pipe and the writer has closed the pipe or exited,
read(2) will return 0 bytes. Writes to a pipe with no reader will generate a note sys: write on closed pipe.
SOURCE
/sys/src/libc/9syscall
SEE ALSO
intro(2), read(2), pipe(3)
DIAGNOSTICS
Sets errstr.
BUGS
If a read or a write of a pipe is interrupted, some unknown number of bytes may have been transferred.
When a read from a pipe returns 0 bytes, it usually means end of file but is indistinguishable from reading the result of an explicit write
of zero bytes.
PIPE(2)