I am trying to run the following code from a script file but it complains that syntax of (both instances of) grep is wrong.
When I copy and paste it to the terminal, it is OK. Any idea what the problem might be?
set i = `grep -c #define flags.h`
while ($i>20)
@ i--
my func (`cat... (4 Replies)
without using ls, just using echo so purely pattern matching
I can say echo */ <-- lists directories
but how would I match files? surely something like *!/ or * but neither work ?
it seems like there isn't much that I can put in but surely i should be able to put any ascii... (1 Reply)
completion-ignore-case option doesn't work in my version:
/home/user $ echo $BASH_VERSION
3.2.48(1)-release
/home/user $ ls -l *
-rw-r--r-- 1 user user 0 2009-10-18 00:09 somefile
-rw-r--r-- 1 user user 0 2009-10-18 00:09 Somefile
/home/user $ set completion-ignore-case on
But when I... (2 Replies)
I am writing perl script to configure Cisco device but Variables inside Net::Telnet::Cisco Module doesn't work and passed to device without resolving.
Please advise.
here is a sample of script:
use Net::Telnet::Cisco;
$device = "10.14.199.1";
($o1, $o2, $o3, $o4) = split(/\./,$device);... (5 Replies)
Hi,
I'm trying to write a script that checks gvfs to see if a mount exists so I can run it from network-manager's status hooks. I thought I'd pipe the output of gvfs-mount -l to grep for the particular mounts I care about. When I do this in a bash script:
cmnd="gvfs-mount -l | grep -i... (4 Replies)
Hello Friends,
My bash script is like this
#!/bin/bash
# request Bourne shell as shell for job
#$ -S /bin/bash
# assume current working directory as paths
#$ -cwd
#$ -N rsync-copy
#
# print date and time
date
rsync -rltD --progress "ssh -i /home/myname/.ssh/id_rsa"... (4 Replies)
Hi everyone,
I've an issue trying to soustracte two dates, e.g:
d1=$(date -d "Nov 18, 2017" +%s)
d2=$(date +%s) # Today we are 2017-11-16
echo "$(( (d1 - d2) / 86400 ))"
Output:
1
I don't understand why it doesn't work. for me, it should give "18 - 16 = 2".
Much appreciated... (1 Reply)
Bash version 4.4.20 / Ubuntu 16.0.4
Hello,
I tried to write a script that gathers some data and passes them to an executable.
The executed application answers with an error. The echo output in the script returns correct values.
If I copy/paste the last echo command, it get's executed... (2 Replies)
I have the following code:
#!/bin/csh
clear
set cloud_file="/home/labs/koren/davidsr/general_scripts/MFP_10_PP_Parmas.txt" # to fill
set mie_tables_dir='/home/labs/koren/davidsr/SHDOM_MAIN/MIE_TABLES/non_polo_wave_0.7_water_50R_s0.5_e25_max_70.mie' # to fill
set prp_dir='${pp_dir}/pp_prp/'... (2 Replies)
Discussion started by: student_wiz
2 Replies
LEARN ABOUT MOJAVE
env5.18
Env(3pm) Perl Programmers Reference Guide Env(3pm)NAME
Env - perl module that imports environment variables as scalars or arrays
SYNOPSIS
use Env;
use Env qw(PATH HOME TERM);
use Env qw($SHELL @LD_LIBRARY_PATH);
DESCRIPTION
Perl maintains environment variables in a special hash named %ENV. For when this access method is inconvenient, the Perl module "Env"
allows environment variables to be treated as scalar or array variables.
The "Env::import()" function ties environment variables with suitable names to global Perl variables with the same names. By default it
ties all existing environment variables ("keys %ENV") to scalars. If the "import" function receives arguments, it takes them to be a list
of variables to tie; it's okay if they don't yet exist. The scalar type prefix '$' is inferred for any element of this list not prefixed by
'$' or '@'. Arrays are implemented in terms of "split" and "join", using $Config::Config{path_sep} as the delimiter.
After an environment variable is tied, merely use it like a normal variable. You may access its value
@path = split(/:/, $PATH);
print join("
", @LD_LIBRARY_PATH), "
";
or modify it
$PATH .= ":.";
push @LD_LIBRARY_PATH, $dir;
however you'd like. Bear in mind, however, that each access to a tied array variable requires splitting the environment variable's string
anew.
The code:
use Env qw(@PATH);
push @PATH, '.';
is equivalent to:
use Env qw(PATH);
$PATH .= ":.";
except that if $ENV{PATH} started out empty, the second approach leaves it with the (odd) value "":."", but the first approach leaves it
with ""."".
To remove a tied environment variable from the environment, assign it the undefined value
undef $PATH;
undef @LD_LIBRARY_PATH;
LIMITATIONS
On VMS systems, arrays tied to environment variables are read-only. Attempting to change anything will cause a warning.
AUTHOR
Chip Salzenberg <chip@fin.uucp> and Gregor N. Purdy <gregor@focusresearch.com>
perl v5.18.2 2013-11-04 Env(3pm)