because grep will return true if there was a match, and false otherwise.
The redirection to /dev/null is because grep prints the matching line, which you don't want in this case. Many grep implementations also have a -q option which does the same thing.
Hello all,
How do I start a background process and save the process id to a file on my system. For example %wait 5 & will execute and print the process id. I can't figure out how to get it to a file. I've tried: > filename 0>filename 1>filename.
Any assistance is most appreciated.
Thanks,
Jim... (10 Replies)
Hello All,
I am a newbie in Shell script programming, and maybe you can help me with my query.
I need to write a shell script (mntServer.ksh) that will start a background process and also to be able to run another script.
The mntServer.ksh script contains:
#!/bin/ksh... (1 Reply)
I have a following program:
echofunc()
{
filename=$1
echo "reading $filename"
while read line
do
echo $line;
sleep 6;
done < $filename
}
split -5 new.dat
ls x* > input.dat
while read file
do
echofun $file &
done < input.dat (3 Replies)
Hi Gurus,
I have a server that has to users.
1) root
2)net1
there are several processes running on my server
one of the process is CMIS_STACK process which is a compiled C code
when this process goes missing then i restart this process manually in the following manner
... (2 Replies)
I actually posted this problem on a different forum, but figured this would be a more appropriate place to post it.
OK so I've created my own shell, but I can't get the background process function to run properly! What I want to do is to run a process in the background, and also print when the... (2 Replies)
What I need to learn is how to use a script that launches background processes, and then kills those processes as needed.
The script successfully launches the script. But how do I check to see if the job exists before I kill it?
I know my problem is mostly failure to understand parameter... (4 Replies)
Dear Brothers!
Need your help for the case where I am running one command on prompt and its giving us the correct output, but when i use the same command from shell its directs no output.:wall:
the command on command prompt is
ls -ltrh * | nawk '{if ($5~ '/$'M'/') print $9}' | grep -v... (1 Reply)
Hi, i was looking for an answer for some trouble im having runing a script in the cron, thing is, that when i run it manually it works just fine. But when cron runs it, it just doenst work. I saw a reply on a similar subject, suggesting that the . .profile worked for you, but im kind of... (9 Replies)
Guys i am facing two problems :
(1) when i create the sql loader file the date format i m getting is this
28-DEC-11 12.03.14.107137 AM;
for this i m using this script but unable to load the files
trailing nullcols
(
SERIALNO,
AMOUNT,
CLASS,
MDN,
VDATE "to_date(:TIMESTAMP, 'DD-MON-YY... (6 Replies)
Hi Guru's,
I am creating alias for db instance running on a server through script, am able to create them based on /etc/oratab entries and can use successfully with the below script.
#!/bin/bash
SCRIPT_PATH=${HOME}/scripts/db/script... (3 Replies)
Discussion started by: venky.b5
3 Replies
LEARN ABOUT FREEBSD
atf-sh
ATF-SH(1) BSD General Commands Manual ATF-SH(1)NAME
atf-sh [-s shell] -- interpreter for shell-based test programs
SYNOPSIS
atf-sh script
DESCRIPTION
atf-sh is an interpreter that runs the test program given in script after loading the atf-sh(3) library.
atf-sh is not a real interpreter though: it is just a wrapper around the system-wide shell defined by ATF_SHELL. atf-sh executes the inter-
preter, loads the atf-sh(3) library and then runs the script. You must consider atf-sh to be a POSIX shell by default and thus should not
use any non-standard extensions.
The following options are available:
-s shell Specifies the shell to use instead of the value provided by ATF_SHELL.
ENVIRONMENT
ATF_LIBEXECDIR Overrides the builtin directory where atf-sh is located. Should not be overridden other than for testing purposes.
ATF_PKGDATADIR Overrides the builtin directory where libatf-sh.subr is located. Should not be overridden other than for testing purposes.
ATF_SHELL Path to the system shell to be used in the generated scripts. Scripts must not rely on this variable being set to select a
specific interpreter.
EXAMPLES
Scripts using atf-sh(3) should start with:
#! /usr/bin/env atf-sh
Alternatively, if you want to explicitly choose a shell interpreter, you cannot rely on env(1) to find atf-sh. Instead, you have to hardcode
the path to atf-sh in the script and then use the -s option afterwards as a single parameter:
#! /path/to/bin/atf-sh -s/bin/bash
ENVIRONMENT
ATF_SHELL Path to the system shell to be used in the generated scripts.
SEE ALSO atf-sh(3)BSD September 27, 2014 BSD