Hi,
I justs started learning Unix on my own.
I have a question:
What command can I use when I need to read in part of the file into another file?
I remember I saw it somewhere but I don't know what it is.
Thanks (3 Replies)
Hi there,
I am lil confused with the following issue.
I have a File, which has the following header: IMSHRATE_043008_101016
a sample detailed record is :9820101 A982005000CAVG030108000000000000010169000MAR 2008
9820102 MAR 2008 D030108
... (1 Reply)
Ok, I am brand new to UNIX and I am trying to learn a cross between basic script and database use. I had got some ideas off the net on simple ideas for learning UNIX. I am working on creating a simple phone book program that allows myself to enter our employees from work into a phone book text... (0 Replies)
For a field format such as AAL1001_MD82, how do I select(and use in if statement) only the last four elements( in this case MD82) or the first three elements (in this case AAL)?
For instance, how do I do the following - if first three elements of $x == yyy, then ... (5 Replies)
Hi Guys
I need to have a shell script which reads a log file and insert a part of each line into the database. Some sample lines in the file are as below.
20091112091359 MED_RQACK : user_data=60173054304,100232120,20091112091359,;ask_status=0;ask_reason=OK;msg_id=20091112091319... (5 Replies)
Hi,
I have 80 large files, from which I want to get a specific value to run a Bash script. Firstly, I want to get the part of a file which contains this:
Name =A
xxxxxx
yyyyyy
zzzzzz
aaaaaa
bbbbbb
Value = 57
This is necessary because in a file there are written more lines which... (6 Replies)
I have files named with different prefixes. From each I want to extract the first line containing a specific string, and then print that line along with the prefix.
I've tried to do this with a while loop, but instead of printing the prefix I print the first line of the file twice.
Files:... (3 Replies)
Hello
let me explain senario.
there is a file which name is config and it store main software variable:
file main.conf contents:
update="1"
log_login="0"
allow_ports=""
deny_ports="21,22,23"
and there is a file which name is ports.txt
file ports.txt contents:
25,26,27
i... (3 Replies)
I'm working on Aix 6.1 and using ksh shell.
The below works fine on Linux bash or ksh shell .
while IFS= read -r dirpath ; do
echo "Hi"
done <<<"$var"
However, any such while loop that reads the input from file or variable using <<< fails on Aix system with the below error:
Below... (2 Replies)
Discussion started by: mohtashims
2 Replies
LEARN ABOUT MOJAVE
net::server::daemonize
Net::Server::Daemonize(3) User Contributed Perl Documentation Net::Server::Daemonize(3)NAME
Net::Server::Daemonize - Safe fork and daemonization utilities
SYNOPSIS
use Net::Server::Daemonize qw(daemonize);
daemonize(
'nobody', # User
'nobody', # Group
'/var/state/mydaemon.pid' # Path to PID file - optional
);
DESCRIPTION
This module is intended to let you simply and safely daemonize your server on systems supporting the POSIX module. This means that your
Perl script runs in the background, and it's process ID is stored in a file so you can easily stop it later.
EXPORTED FUNCTIONS
daemonize
Main routine. Arguments are user (or userid), group (or group id or space delimited list of groups), and pid_file (path to file).
This routine will check on the pid file, safely fork, create the pid file (storing the pid in the file), become another user and group,
close STDIN, STDOUT and STDERR, separate from the process group (become session leader), and install $SIG{INT} to remove the pid file.
In otherwords - daemonize. All errors result in a die. As of version 0.89 the pid_file is optional.
safe_fork
Block SIGINT during fork. No arguments. Returns pid of forked child. All errors result in a die.
set_user
Become another user and group. Arguments are user (or userid) and group (or group id or space delimited list of groups).
set_uid
Become another user. Argument is user (or userid). All errors die.
set_gid
Become another group. Arguments are groups (or group ids or space delimited list of groups or group ids). All errors die.
get_uid
Find the uid. Argument is user (userid returns userid). Returns userid. All errors die.
get_gid
Find the gids. Arguments are groups or space delimited list of groups. All errors die.
is_root_user
Determine if the process is running as root. Returns 1 or undef.
check_pid_file
Arguments are pid_file (full path to pid_file). Checks for existance of pid_file. If file exists, open it and determine if the
process that created it is still running. This is done first by checking for a /proc file system and second using a "ps" command (BSD
syntax). (If neither of these options exist it assumed that the process has ended) If the process is still running, it aborts.
Otherwise, returns true. All errors die.
create_pid_file.
Arguments are pid_file (full path to pid_file). Calls check_pid_file. If it is successful (no pid_file exists), creates a pid file
and stores $$ in the file.
unlink_pid_file
Does just that.
SEE ALSO
Net::Server. Net::Daemon, The Perl Cookbook Recipe 17.15.
AUTHORS
Jeremy Howard <j+daemonize@howard.fm>
Program flow, concepts and initial work.
Paul Seamons <paul@seamons.com>
Code rework and componentization. Ongoing maintainer.
LICENSE
This package may be distributed under the terms of either the
GNU General Public License
or the
Perl Artistic License
All rights reserved.
perl v5.18.2 2012-05-29 Net::Server::Daemonize(3)