I am having a problem here. We are having several problems in regards to hung process's on unix (HPUX box), caused by my RF equipment (Mobile data capture units). these contact the host via a simply telnet session and locks the system?
Is it a timeout problem as the timeout is disabled on the host. (5 Replies)
Unix Gurus,
I have been breaking my head to get this done..seems simple..
I need to read a flat file and based on a key word in a line, i need to skip the previous 3 lines.
eg :
Line1
Line2
Line3
Line4
Line5
Line6
Error
Line7
Line8
Line9
Error
Line10 (4 Replies)
I wish to substituite a string on each line but ONLY if it appears within double-quotes:
this_string="abc#def#geh" # Comment here
I wish to change the "#" characters within the double quoted string to "_":
this_string="abc_def_geh" # Comment here
... but as you see, the "comment" hash... (2 Replies)
Hey guys im trying to get this if statement to work and i dont know whats wrong. can anybody help?
if($author=~/\A+\Z/i)&&(length($author!=0))
{
print " $author validation correct"
}
elsif($author!=~/\A+\Z/i)&&(length($author=0))
{
$author='BLANK';
}
else
{
... (1 Reply)
I have created a dummy file -demo.txt
On my machine-A (oslevel-5300-08) I can display the file content in HEX format through VI editor using :%!xxd but on other machine-B (oslevel - 5300-06) , I get error as "sh: xxd: not found."
machine-A:
$ cat demo.txt
Hello World !
I can display... (7 Replies)
Hi,
I have a file monitor.txt as below...
# Times are converted to local time from GMT.
# Local Timezone: EST (GMT -05:00)
PARAM1
{
TIME 30;
CC1 "xxxxx";
CC2 "xxxxx";
CC3 "xxxxx";
CC4 "xxxxx";
}
PARAM2
{
4061 :... (3 Replies)
Hi all, I just signed up to the forums, although, I have lurked on here for awhile. Anyways, my issue is I am trying to get awk to spit out something I can use without having to spend hours in excel hell haha. So, I used sed to replace the spaces with semicolons and redirected that to a file. ... (6 Replies)
Hi Folks.
I need change something into file and after all manipulation I need delete only last COMMA into this piece of code ->
GROUP 1 (
'/oralog1/ORAPRD/log01a.dbf',
'/oralog2/ORAPRD/log01b.dbf'
) SIZE 512M,
GROUP 2 (
'/oralog1/ORAPRD/log02a.dbf',
... (12 Replies)
Hi.,
I need to ask question for expect script.
I have prompt like #
and very long script (orachk).
I added to expect script line
set prompt "(%|#|\\\$) $"
and insert into it also piece of code
----
expect {
timeout {
puts "Running..."
exp_continue
}
... (0 Replies)
Discussion started by: beckss
0 Replies
LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$SHELL -c". This doesn't work as intended:
ssh host touch 'hi there' # fails
It creates 2 files, hi and there. Instead, do this:
cmd=`shell-quote touch 'hi there'`
ssh host "$cmd"
This gives you just 1 file, hi there.
process find output
It's not ordinarily possible to process an arbitrary list of files output by find with a shell script. Anything you put in $IFS to
split up the output could legitimately be in a file's name. Here's how you can do it using shell-quote:
eval set -- `find -type f -print0 | xargs -0 shell-quote --`
debug shell scripts
shell-quote is better than echo for debugging shell scripts.
debug() {
[ -z "$debug" ] || shell-quote "debug:" "$@"
}
With echo you can't tell the difference between "debug 'foo bar'" and "debug foo bar", but with shell-quote you can.
save a command for later
shell-quote can be used to build up a shell command to run later. Say you want the user to be able to give you switches for a command
you're going to run. If you don't want the switches to be re-evaluated by the shell (which is usually a good idea, else there are
things the user can't pass through), you can do something like this:
user_switches=
while [ $# != 0 ]
do
case x$1 in
x--pass-through)
[ $# -gt 1 ] || die "need an argument for $1"
user_switches="$user_switches "`shell-quote -- "$2"`
shift;;
# process other switches
esac
shift
done
# later
eval "shell-quote some-command $user_switches my args"
OPTIONS --debug
Turn debugging on.
--help
Show the usage message and die.
--version
Show the version number and exit.
AVAILABILITY
The code is licensed under the GNU GPL. Check http://www.argon.org/~roderick/ or CPAN for updated versions.
AUTHOR
Roderick Schertler <roderick@argon.org>
perl v5.16.3 2010-06-11 SHELL-QUOTE(1)