10-29-2011
10 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
I have to execute some commands after executing one command ( cleartool setview Tagname)
Problem is that I write commands in script like this.
echo "test1"
cleartool setview tagname
echo "test2"
copy file1 file2
echo "test3"
but when I execute script.
Output
---------
test1
If I... (1 Reply)
Discussion started by: udaykishore
1 Replies
2. Shell Programming and Scripting
Hey there,
I am trying to pass a command as argument to a function.
The command shows up in $1.
Now I want to execute this command, but if I do a $1
./sample
"bla/blaprintf: warning: ignoring excess arguments, starting with `bla/bla'
The code is :
#!/bin/ksh
fn()
{
$1
}
fn... (3 Replies)
Discussion started by: shriyer
3 Replies
3. Shell Programming and Scripting
Hi,
I want to run these two commands one after the other.
awk 'BEGIN {OFS="\t"} {print $2}'
sort -u
rather than typing awk 'BEGIN {OFS="\t"} {print $2}' file1 > file2, then sort -u file2 > file3. Is it possible to run both commands on file1 then get output file3?
Its kinda hard for... (5 Replies)
Discussion started by: kylle345
5 Replies
4. UNIX for Dummies Questions & Answers
We have two processes, one which copies a control file into a folder and another which is polling this folder and reading the control files.
Sometimes they clash and the reader fails because the copy is still happening.
We have been told that we should change the copy to a move because the... (1 Reply)
Discussion started by: sbarnes
1 Replies
5. Shell Programming and Scripting
I need to execute a command to run my script several times with varying parameters
perl ex.pl -b 130198 -e 130884 -c plot plot.txt 1_plot.txt
perl ex.pl -b 1345 -e 1308 -c plot plot.txt 2_plot.txt
perl ex.pl -b 1345567 -e 130898 -c plot plot.txt 3_plot.txt
.
.
.
100's of excutions
... (2 Replies)
Discussion started by: Lucky Ali
2 Replies
6. UNIX for Dummies Questions & Answers
the ssh calling convention:
ssh <server>
If I put commands in the section, ssh will execute them immediately after logging in and return to local shell. I want to stay in the remote shell after executing these commands. How can I achieve this?
Thanks for all. (1 Reply)
Discussion started by: hplonlien
1 Replies
7. Shell Programming and Scripting
Hi All,
I am trying to execute a shell script containg awk commands. But unable to do so. Below is my script. Please help.
The name of the script is scan.sh and I have tried executing it using the command sh scan.sh
It is giving an error which reads like:
awk:syntax error near line 7... (3 Replies)
Discussion started by: misb
3 Replies
8. Shell Programming and Scripting
Hello
In the shell script we have a FTP command like below
ftp -n -v -q winftp.principal.com >/infa/datafiles/GRP/Scripts/ftp_from_infa_dvcn.log<<END_SCRIPT
quote USER $FTP_USER
quote PASS $FTP_PASS
ascii
lcd $FTP_LOCALDIR
cd $FTP_FLDR
put $FTP_FILE
bye
exit
If i... (1 Reply)
Discussion started by: Pratik4891
1 Replies
9. Shell Programming and Scripting
I am trying to execute a piped combination of shell commands inside a perl program.
However, it is not working as desired.
This is my program, i am trying to print only filenames from the output of ls -l
$ cat list_test
#!/usr/bin/perl -w
use strict;
my $count=0;
my @list=`ls -l|awk... (4 Replies)
Discussion started by: sam05121988
4 Replies
10. Shell Programming and Scripting
I would like to execute a commands in four different servers through ssh at a single instance(simultaneously).
Below are the details with examples,
ssh user1@server1 "grep xxxx logs"
ssh user1@server2 "grep xxxx logs"
ssh user1@server3 "grep xxxx logs"
Each statement will take some... (4 Replies)
Discussion started by: Amutha
4 Replies
exec(1) User Commands exec(1)
NAME
exec, eval, source - shell built-in functions to execute other commands
SYNOPSIS
sh
exec [argument...]
eval [argument...]
csh
exec command
eval argument...
source [-h] name
ksh
*exec [arg...]
*eval [arg...]
DESCRIPTION
sh
The exec command specified by the arguments is executed in place of this shell without creating a new process. Input/output arguments may
appear and, if no other arguments are given, cause the shell input/output to be modified.
The arguments to the eval built-in are read as input to the shell and the resulting command(s) executed.
csh
exec executes command in place of the current shell, which terminates.
eval reads its arguments as input to the shell and executes the resulting command(s). This is usually used to execute commands generated as
the result of command or variable substitution.
source reads commands from name. source commands may be nested, but if they are nested too deeply the shell may run out of file descrip-
tors. An error in a sourced file at any level terminates all nested source commands.
-h Place commands from the file name on the history list without executing them.
ksh
With the exec built-in, if arg is given, the command specified by the arguments is executed in place of this shell without creating a new
process. Input/output arguments may appear and affect the current process. If no arguments are given the effect of this command is to mod-
ify file descriptors as prescribed by the input/output redirection list. In this case, any file descriptor numbers greater than 2 that are
opened with this mechanism are closed when invoking another program.
The arguments to eval are read as input to the shell and the resulting command(s) executed.
On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways:
1. Variable assignment lists preceding the command remain in effect when the command completes.
2. I/O redirections are processed after variable assignments.
3. Errors cause a script that contains them to abort.
4. Words, following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a vari-
able assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation are not
performed.
EXIT STATUS
For ksh:
If command is not found, the exit status is 127. If command is found, but is not an executable utility, the exit status is 126. If a redi-
rection error occurs, the shell exits with a value in the range 1-125. Otherwise, exec returns a zero exit status.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO
csh(1), ksh(1), sh(1), attributes(5)
SunOS 5.10 17 Jul 2002 exec(1)