I'm implementing a shell in C that supports piping, output redirection, and background processing, and a few other commands. I was wondering how I'd go about implementing the output redirection. So, I'd open a file and I'd fork and execute the command. But how would I get stdout into the file? Any... (10 Replies)
Hi,
I am implementing a shell in C, with the following problem...
Suppose the shell is invoked from the command line as
>> myshell < test.in > test.out 2>&1
I have to execute the commands in test.in and redirect them to test.out
How does one detect in the main function that the shell... (1 Reply)
Hi all
I am facing a problem with redirection. Its somewhat related to parsing.
I am following the following steps.
1. take the command and tokenize it.
2. if redirection is there then give it to redirection unit
3. if pipe is there give it to piping unit.
4. do until the command ends
... (0 Replies)
i have a client server connection steady and running... but the problem here is that the file transfer is very crude and succeptible to risks... so i want to implement ftp.. can anybody suggest a way to implement it or any book to read? (4 Replies)
Hello,
I am trying to implement TCP protocol in C.
I have read the RFC for TCP and have knowledge about it.
But I am stuck in coding.
Are ther any reference links, code snippets available for reference? (1 Reply)
I am trying to implement a login screen to the following code how would i go about doing so. I have try to place the password in a variable using if statements which would usually work but as i have the system in a while loop i think i need to find another method.
#!/bin/bash
#Filename:... (4 Replies)
Discussion started by: warlock129
4 Replies
7. Post Here to Contact Site Administrators and Moderators
Hi Everyone. First, I want to thank all of you for letting me participate in this great group.
I am having a bit of a problem.
After I get an email from a responder, I login to make my reply.
In the mean time I get another response by email from another member, I go to reply to them and I... (6 Replies)
i have following input file...
00290002STDR000000000000000000000000000EOD END TRANSACTION ^@^@^@^@^@^@^@^@^@^@^@^@^
00299998STDR070000000007000000000000000STANDING DEBITS ^@^@^@^@^@^@^@^@^@^@^@^@^... (1 Reply)
Hello All,
I am trying a shell script for automatically login to test servers and pulling the output of top command from all using expect.
----snippet of code ---
#!/usr/bin/expect -f
#!/bin/bash
server1=10.251.222.51
server=("$server1")
i=1
for exp_server in ${server}; do
expect -c... (3 Replies)
When unlocking a Linux server's console there's no event indicating successful logging
Is there a way I can fix this ?
I have the following in my rsyslog.conf
auth.info /var/log/secure
authpriv.info /var/log/secure (1 Reply)
Discussion started by: walterthered
1 Replies
LEARN ABOUT DEBIAN
dh-exec-subst
DH-EXEC-SUBST(1) dh-exec DH-EXEC-SUBST(1)NAME
dh-exec-subst - Debhelper executable file substition scripts
SYNOPSIS
#! /usr/bin/dh-exec
src/libfoo-*.so.* debian/foo-plugins/usr/lib/foo/${DEB_HOST_MULTIARCH}/
DESCRIPTION
Being a sub-command of dh-exec(1), this program must not be ran directly, but through dh-exec, which automatically runs all available
sub-commands if run bare; or explicitly with dh-exec --with=subst.
It is a wrapper around the various other substitution helpers, and will pipe the input file through all the available substitution helpers.
It is up to these scripts to do the actual work.
When a helper fails to expand a variable within its input, it will leave it as-is, so that later in the pipeline it can perhaps be expanded
by another program.
SCRIPTS
dh-exec-subst-env
Substitutes any of the available, exported environment variables into its input. It does not do any kind of filtering: whatever is
available in the environment, will be available for substitution, however unsafe that may be.
dh-exec-subst-multiarch
Attempts to expand any of the variables known to dpkg-architecture(1), mostly useful for multi-arch support.
The command will query dpkg-architecture(1) directly, and does not rely on environment variables set (as the called program will
prefer already set environment variables anyway).
ENVIRONMENT
DH_EXEC_SCRIPTDIR
Indicates which directory the command-specific scripts should be sought for. If not specified, scripts will be searched for in
/usr/share/dh-exec/.
FILES
$DH_EXEC_SCRIPTDIR/dh-exec-subst-*
The various scripts for the higher-level program.
SEE ALSO debhelper(1), dh-exec(1)AUTHOR
dh-exec-subst is copyright (C) 2011-2012 by Gergely Nagy <algernon@madhouse-project.org>.
2012-05-03 DH-EXEC-SUBST(1)