Hi,
I have a script that's being called via a crontab which is a wrapper script that creates a log for the script that gets executed. Within the script that gets executed, it also run's subscripts. I've been able to get everything to work .. but the issue is one of the subscript that goes out... (4 Replies)
hi,
i wat to get the output of a grep command in a file. but when i am trying out the same grep command in the unix prompt its working fine.. i am getting the output properly.. but when i am writing the same command inside my shell script , its just creating a new output file with no contents... (11 Replies)
Hi,
I have a process running in the background, which throws up some output to the terminal when I run my script. How can I read this output from my script?
Thank you. (5 Replies)
Dear All:
I am trying to do something that (I thought) was relatively straightforward, but my code snippet does not seem to work.
Any suggestions?
Thank you
Sincerely yours
Misha Koshelev
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include... (0 Replies)
I've been using tftp in one of my file
#!/bin/bash
filename1="config1h.txt"
filename2="config15.txt"
hostname="test.com"
tftp $hostname <</dev/null
get $filename1
get $filename2
quit
EOF
My output looks like this
# ./test3.sh
tftp> Received 1262 bytes in 0.0 seconds
tftp> Received... (2 Replies)
Hi, I put a for loop in a script to eject backup tapes from the robot. The command echo' output goes to the log file without problem, but command vmchange's output does not go to the log file although it's working fine. It still displays on the screen. I've tried '2>&1 1>$log', but nothing changed.... (5 Replies)
Below script perfectly works, giving below mail output. BUT, I want to make the script mail only if there are any D-Defined/T-Transition/B-Broken State WPARs and also to copy the output generated during monitoring to a temporary log file, which gets cleaned up every week. Need suggestions.
... (4 Replies)
hi,
i have a html form which call a perl program, this perl program calls a shell script.
<html>
<head>
<title>demo</title>
</head>
<body>
<form name="frm1" action="/cgi-bin/perl_script.pl" method="post">
<input type="text" name="fname">
... (1 Reply)
hi,
i am using ftp to get files from remote server. inside the ftp i want to us ls -ltr command and send the output of it to a file.
ftp -n remote_server <<_FTP
quote USER username
quote PASS password
prompt noprompt
pwd
ls -ltr
get s1.txt
bye
_FTP
i... (4 Replies)
Hi Guys,
I want to redirect the output of 3 scripts to a file and then mail the output of those three scripts.
I used below but it is not working:
OFILE=/home/home1/report1
echo "report1 details" > $OFILE
=/home/home1/1.sh > $OFILE
echo... (7 Replies)
Discussion started by: Vivekit82
7 Replies
LEARN ABOUT REDHAT
apache::subprocess
SUBPROCESS(1) User Contributed Perl Documentation SUBPROCESS(1)NAME
Apache::SubProcess -- Executing SubProcesses from mod_perl
SYNOPSIS
use Apache::SubProcess ();
use Config;
use constant PERLIO_IS_ENABLED => $Config{useperlio};
# pass @ARGV / read from the process
$command = "/tmp/argv.pl";
@argv = qw(foo bar);
$out_fh = Apache::SubProcess::spawn_proc_prog($r, $command, @argv);
$output = read_data($out_fh);
# pass environment / read from the process
$command = "/tmp/env.pl";
$r->subprocess_env->set(foo => "bar");
$out_fh = Apache::SubProcess::spawn_proc_prog($r, $command);
$output = read_data($out_fh);
# write to/read from the process
$command = "/tmp/in_out_err.pl";
($in_fh, $out_fh, $err_fh) =
Apache::SubProcess::spawn_proc_prog($r, $command);
print $in_fh "hello
";
$output = read_data($out_fh);
$error = read_data($err_fh);
# helper function to work w/ and w/o perlio-enabled Perl
sub read_data {
my($fh) = @_;
my $data;
if (PERLIO_IS_ENABLED || IO::Select->new($fh)->can_read(10)) {
$data = <$fh>;
}
return defined $data ? $data : '';
}
DESCRIPTION
"Apache::SubProcess" provides the Perl API for running and communicating with processes spawned from mod_perl handlers.
API
spawn_proc_prog()
$out_fh =
Apache::SubProcess::spawn_proc_prog($r, $command, [@argv]);
($in_fh, $out_fh, $err_fh) =
Apache::SubProcess::spawn_proc_prog($r, $command, [@argv]);
spawn_proc_prog() spawns a sub-process which exec()'s $command and returns the output pipe filehandle in the scalar context, or input, out-
put and error pipe filehandles in the list context. Using these three pipes it's possible to communicate with the spawned process.
The third optional argument is a reference to an array which if passed becomes ARGV to the spawned program.
It's possible to pass environment variables as well, by calling:
$r->subprocess_env->set($key => $value);
before spawning the subprocess.
There is an issue with reading from the read filehandle ($in_fh)):
A pipe filehandle returned under perlio-disabled Perl needs to call select() if the other end is not fast enough to send the data, since
the read is non-blocking.
A pipe filehandle returned under perlio-enabled Perl on the other hand does the select() internally, because it's really a filehandle
opened via ":APR" layer, which internally uses APR to communicate with the pipe. The way APR is implemented Perl's select() cannot be used
with it (mainly because select() wants fileno() and APR is a crossplatform implementation which hides the internal datastructure).
Therefore to write a portable code, you want to use select for perlio-disabled Perl and do nothing for perlio-enabled Perl, hence you can
use something similar to the read_data() wrapper shown in the SYNOPSIS section.
perl v5.8.0 2002-09-02 SUBPROCESS(1)