You cannot put the redirect into the variable like that and in general you are in for a quoting exercise.
Why not use RudiC's suggestion or
And use the latter variable for your substitutions.. There is always a security concern with eval. In this case c is a numerical value, controlled by you..
Last edited by Scrutinizer; 05-09-2014 at 07:31 AM..
i have two lines in my rc.local file that are
wget -O/<path>/<file>.zip url://domain.com
unzip -o /<path>/<file>.zip
the wget works fine, but the unzip won't work. when i copy/pase the unzip line to the prompt it works fine. i thought that maybe the unzip was running before the wget... (0 Replies)
Hi All,
I need to pass a variable to perl script from bash script, where in perl i am using if condition. Here is the cmd what i am using in perl
FROM_DATE="06/05/2008"
TO_DATE="07/05/2008"
"perl -ne ' print if ( $_ >="$FROM_DATE" && $_ <= "$TO_DATE" ) ' filename"
filename has... (10 Replies)
Is it possible with a bash variable to perform multiple substitution strings to one variable?
I have this variable:
echo $clock
TIMEZONE="US/Central"
What I would like to do with bash only it pull out just the "US" part of the variable.. which could be any number of countries.
this is... (6 Replies)
When script is running you only see when some of the commands are not successfull.
Is there a way to see which command are executed and to show the substitution of variables as every line is executed ? (3 Replies)
Hello,
can someone please help me to fix this script,
I have a 2 files, one file has hostname information and second file has console information of the hosts in each line, I have written a script which actually reads each line in hostname file and should grep in the console file and paste the... (8 Replies)
Hi
I need help with my coding , first time I'm working with bash .
What i must do is check if there is 3 .txt files if there is not 3 of them i must give an error code , if al three is there i must first arrange them in alphabetical order and then take the last word in al 3 of the .txt files... (1 Reply)
Hi I am trying to do the following in a script find a string and add in a block of text two lines above on the command line this works fine
#/usr/bin/cat /usr/local/etc/dhcpd.conf_subnet | /usr/xpg4/bin/sed -n -e '1h;1\!H;${;g;s/}.*#END of 10.42.33.0/#START of RANGE $dstart\:option... (3 Replies)
I have a script.
filecreatenew () {
touch /usr/src/$1_newfile.txt
var=$1
echo $var
touch /usr/src/$var_newfile_with_var.txt
}
filecreatenew myfile
Its creating file /usr/src/myfile_newfile.txt as the variable $1 is correctly used. When $ is... (2 Replies)
Hi, I am trying to do a bash script that convert a decimal number to a binary value, but it doesn't work...
To begin, I am just trying to convert a positive number to 8 bits binary.
read -p"Entrez un nombre entre -128 et 127 pour l'encoder en binaire: " number
binaryValues=(128 64 32 16 8 4 2... (8 Replies)
Discussion started by: Zedki
8 Replies
LEARN ABOUT DEBIAN
explain_setenv_or_die
explain_setenv_or_die(3) Library Functions Manual explain_setenv_or_die(3)NAME
explain_setenv_or_die - change or add an environment variable and report errors
SYNOPSIS
#include <libexplain/setenv.h>
void explain_setenv_or_die(const char *name, const char *value, int overwrite);
int explain_setenv_on_error(const char *name, const char *value, int overwrite);
DESCRIPTION
The explain_setenv_or_die function is used to call the setenv(3) system call. On failure an explanation will be printed to stderr, obtained
from the explain_setenv(3) function, and then the process terminates by calling exit(EXIT_FAILURE).
The explain_setenv_on_error function is used to call the setenv(3) system call. On failure an explanation will be printed to stderr,
obtained from the explain_setenv(3) function, but still returns to the caller.
name The name, exactly as to be passed to the setenv(3) system call.
value The value, exactly as to be passed to the setenv(3) system call.
overwrite
The overwrite, exactly as to be passed to the setenv(3) system call.
RETURN VALUE
The explain_setenv_or_die function only returns on success, see setenv(3) for more information. On failure, prints an explanation and
exits, it does not return.
The explain_setenv_on_error function always returns the value return by the wrapped setenv(3) system call.
EXAMPLE
The explain_setenv_or_die function is intended to be used in a fashion similar to the following example:
explain_setenv_or_die(name, value, overwrite);
SEE ALSO setenv(3)
change or add an environment variable
explain_setenv(3)
explain setenv(3) errors
exit(2) terminate the calling process
COPYRIGHT
libexplain version 0.52
Copyright (C) 2010 Peter Miller
explain_setenv_or_die(3)