Hi
I want both standard output and standard error of my command cmd to go to the same file log.txt. please let me know the best commandline to do this.
Thanks (2 Replies)
Hello,
I am very new in writing low level programming in C. I am trying to get an output in Linux 2.6.17.6 gentoo platform, but I don't get any output.
I am trying to do the following:
I am trying to scan a word and print its content at the standard output by using sscanf and printf.
I... (6 Replies)
Hello all
Im using CC: Sun C++ 5.6 2004/07/15 and using the -library=stlport4 when linkning im getting
The fallowing error :
Undefined first referenced
symbol in file
std::ostream &std::ostream::operator<<(std::ios_base&(*)(std::ios_base&))... (0 Replies)
hey guys, I have two files both with two columns, I have already created an
awk code to ignore certain lines (e.g lines that start with 963) as they wou
ld begin with a certain string, however, the rest I have added together and
calculated the average.
At the moment the code also displays... (3 Replies)
Hi all,
I implemented a C++ program and successfully compiled and ran on my laptop. However when I copy my code to another machine (school's sun machine), it didn't run properly. I can compile and run, but cout does not print everything. I used cout in a loop where it iterates no more than 20... (5 Replies)
Hello Friends,
Can some one help me how to redirect output of a file to both a file and std output? All the help would be greatly appreciated.
Regards
Sridhar (1 Reply)
Hi all,
I have a script that bulk loads thousands of lines of data. I need to log the output during the execution of the script.
I know I can redirect (">") the output to a file; however, I want the output going to both the screen and the log file.
I thought I could use pipe to pipe the... (10 Replies)
Hi guys, i have a new problem, even in scripting on KSH.
Given a string by standard INPUT (keyboard), i need to replace each character i print with this one '#' .
It's to camouflage password while digiting on command line.
For example:
----------------------------------
prompt$ ... (3 Replies)
Hi !
I have this input:
12{11}{11110}{80}3456
{123}15{60}9876{8083}34
I try to work on individual numbers between braces.
3 possible cases (here I used colours to be clearer only):
- there is no "0" among the characters between braces: so we don't touch anything.
- there is a "0" among... (4 Replies)
Discussion started by: beca123456
4 Replies
LEARN ABOUT DEBIAN
shell-quote
SHELL-QUOTE(1p) User Contributed Perl Documentation SHELL-QUOTE(1p)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 v5.8.4 2005-05-03 SHELL-QUOTE(1p)