Perl doesn't auto-complain if something non-critical doesn't work. If you want to call a shell script, but it can't find it (say, because you forgot to type the '.sh' that's part of the filename), system will fail with an error code, which you as the programmer have to catch and act upon (example in perldoc -f system).
And the ouput of the file can be written simpler as
or even
Hello,
I have a problem with trying to run a shell script that reads in user input, validates, and sets to a 'default' value if the input is not valid. I cannot get the portion of resetting to a default value to work. These lines are skipped, and the
value of x is still whatever the user... (1 Reply)
Hi
I am trying to write a login script for network based clients (OSX) that looks up local accounts eg admin, root, etc and exits the script so that it doesn't apply to them. Then for everyone else I make folders eg movies, music, etc that are placed in local harddrive rather than the default... (11 Replies)
Hi guys,
I need to run and test some shell script. At work, i work on ksh. I don't have any such software/client installed at home and i cannot always connect to work from home. At home i have Windows Vista.
Is there a free and reliable software where i can run my ksh script?
Please let me... (4 Replies)
Hi Experts!!
I have written a very simple script in perl.The script is :
$ cat 1.pl
#!/usr/bin/perl
print "Hi there!\n";
When i ran the above perl script it is showing the following error:
$ perl 1.pl
-ksh: cd: bad substitution
Can anybody,help on this ....as why this script is... (1 Reply)
Hi Folks,
I have 2 perl scripts and I need to execute 2nd perl script from the 1st perl script in WINDOWS.
In the 1st perl script that I had, I am calling the 2nd script
main.pl
===========
print "This is my main script\n";
`perl C:\\Users\\sripathg\\Desktop\\scripts\\hi.pl`;
... (3 Replies)
Shell Scipt: temp.sh
su - <$username>
expect pass.exp
Expect script: pass.exp
#!/usr/bin/expect -f
# Login
#######################
expect "Password: " send "<$password>\r"
it comes up with Password: but doesnt take password passed throguh file. (2 Replies)
Hi friends,
i need to prepare a script ( in perl)
i have a file called "demo.exe" in my local unix host.
i have a list of remote hosts in a file "hosts.txt"
now i need to push "demo.exe" file to all the hosts in "hosts.txt" file.
for this i need to prepare a script(in perl, but shell... (5 Replies)
I need to run a local shell script on a remote machine. I am able to achieve that by executing the command
> ssh -qtt user@host < test.sh
However, when I try to pass arguments to test.sh it fails.
Any pointers would be appreciated. (7 Replies)
Hello All,
I need immediate help in creating shell script to call archivebkup.ksh script when archive file system capacity reaches threshold value or 60%
Need to identify the unique file system that reaches threshold value.
ex:
capacity
... (4 Replies)
local script:
cat > first.sh
cd /tmp
echo $PWD
echo `whoami`
cd /tmp/123
tar -cvf 789.tar 456
sleep 10
except script:
cat > first
#!/usr/bin/expect
set ip 10.5.15.20
set user "xyz123"
set password "123456"
set script first.sh
spawn sh -c "ssh $user@$ip bash < $script" (1 Reply)
Discussion started by: Aditya Avanth
1 Replies
LEARN ABOUT MOJAVE
cgi::fast5.18
CGI::Fast(3pm) Perl Programmers Reference Guide CGI::Fast(3pm)NAME
CGI::Fast - CGI Interface for Fast CGI
SYNOPSIS
use CGI::Fast qw(:standard);
$COUNTER = 0;
while (new CGI::Fast) {
print header;
print start_html("Fast CGI Rocks");
print
h1("Fast CGI Rocks"),
"Invocation number ",b($COUNTER++),
" PID ",b($$),".",
hr;
print end_html;
}
DESCRIPTION
CGI::Fast is a subclass of the CGI object created by CGI.pm. It is specialized to work well FCGI module, which greatly speeds up CGI
scripts by turning them into persistently running server processes. Scripts that perform time-consuming initialization processes, such as
loading large modules or opening persistent database connections, will see large performance improvements.
OTHER PIECES OF THE PUZZLE
In order to use CGI::Fast you'll need the FCGI module. See http://www.cpan.org/ for details.
WRITING FASTCGI PERL SCRIPTS
FastCGI scripts are persistent: one or more copies of the script are started up when the server initializes, and stay around until the
server exits or they die a natural death. After performing whatever one-time initialization it needs, the script enters a loop waiting for
incoming connections, processing the request, and waiting some more.
A typical FastCGI script will look like this:
#!/usr/bin/perl
use CGI::Fast;
&do_some_initialization();
while ($q = new CGI::Fast) {
&process_request($q);
}
Each time there's a new request, CGI::Fast returns a CGI object to your loop. The rest of the time your script waits in the call to new().
When the server requests that your script be terminated, new() will return undef. You can of course exit earlier if you choose. A new
version of the script will be respawned to take its place (this may be necessary in order to avoid Perl memory leaks in long-running
scripts).
CGI.pm's default CGI object mode also works. Just modify the loop this way:
while (new CGI::Fast) {
&process_request;
}
Calls to header(), start_form(), etc. will all operate on the current request.
INSTALLING FASTCGI SCRIPTS
See the FastCGI developer's kit documentation for full details. On the Apache server, the following line must be added to srm.conf:
AddType application/x-httpd-fcgi .fcgi
FastCGI scripts must end in the extension .fcgi. For each script you install, you must add something like the following to srm.conf:
FastCgiServer /usr/etc/httpd/fcgi-bin/file_upload.fcgi -processes 2
This instructs Apache to launch two copies of file_upload.fcgi at startup time.
USING FASTCGI SCRIPTS AS CGI SCRIPTS
Any script that works correctly as a FastCGI script will also work correctly when installed as a vanilla CGI script. However it will not
see any performance benefit.
EXTERNAL FASTCGI SERVER INVOCATION
FastCGI supports a TCP/IP transport mechanism which allows FastCGI scripts to run external to the webserver, perhaps on a remote machine.
To configure the webserver to connect to an external FastCGI server, you would add the following to your srm.conf:
FastCgiExternalServer /usr/etc/httpd/fcgi-bin/file_upload.fcgi -host sputnik:8888
Two environment variables affect how the "CGI::Fast" object is created, allowing "CGI::Fast" to be used as an external FastCGI server.
(See "FCGI" documentation for "FCGI::OpenSocket" for more information.)
FCGI_SOCKET_PATH
The address (TCP/IP) or path (UNIX Domain) of the socket the external FastCGI script to which bind an listen for incoming connections
from the web server.
FCGI_LISTEN_QUEUE
Maximum length of the queue of pending connections.
For example:
#!/usr/local/bin/perl # must be a FastCGI version of perl!
use CGI::Fast;
&do_some_initialization();
$ENV{FCGI_SOCKET_PATH} = "sputnik:8888";
$ENV{FCGI_LISTEN_QUEUE} = 100;
while ($q = new CGI::Fast) {
&process_request($q);
}
CAVEATS
I haven't tested this very much.
AUTHOR INFORMATION
Copyright 1996-1998, Lincoln D. Stein. All rights reserved.
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
Address bug reports and comments to: lstein@cshl.org
BUGS
This section intentionally left blank.
SEE ALSO
CGI::Carp, CGI
perl v5.18.2 2014-01-06 CGI::Fast(3pm)