I want to get the eval $* 's return value and pass it to a new variable $val, and get "eval $*" 's the output to variable $results, but I just don't want to run eval $* more than once in function "cmd" to realize this ,
Last edited by yanglei_fage; 08-06-2014 at 09:23 AM..
Hi,
I am new to UNIX and I am more used to simple commands like those in VMS.
One of them is the ability to get the output from a job using the /out=<file> command in VMS.
I want to submit a job (a set of unix commands) using the AT command but to get the output in a file like that used in... (4 Replies)
I can call a C program from the shell and results are outputted as normal. The C program processes some files and spits out a .csv file.
If I scheduled it in cron, there is no output.
If their a special way to schedule C programs in cron?
thanks & regards (1 Reply)
Hello,
I am working on a script to measure the read performance of a busybox environment. The logical choice is to use a command line like:
(time cp * /dev/null) 2> /tmp/howlong.txt
Ah, the rub is cp or /dev/null will only accept a single file at a time.
The result in the txt file is and... (1 Reply)
Hello
I have a script which emails identifies the user ID of a user and sends them an email. A user can enter part of the name of the person he/wants to send the email to. Then I use the ypcat command to identify the UID of that person.
The problem I'm having, is building in an error trap... (1 Reply)
Hi
I want to output the results of multiple commands to a single file.
I use simple Ping, telnet commands to check the connectivity to many servers.
Can i execute all the commands and write the output to a file instead of executing them one by one?
Thanks
Ashok (2 Replies)
This is a three step process:
a) Upload date ->scrub\prep data,
b) insert into db,
c) return php results page.
I have a question about the best practices for unix to process this.
I have data from a flat file that I've scrubbed and cleaned with sed and awk. When it is complete I have an... (0 Replies)
Hi,
I am using the korn shell on Solaris box.
Why does the following 2 commands return different results?
This command returns no results (I already used this command to create a list of files which I moved to an archive directory)
find ????10??_*.dat -type f -mtime +91
However this... (15 Replies)
In the following line The AWK statement parses through a listing for files and outputs the results using the {print} command to the screen. Is there a way to (a) send the output to a file and (b) actually perform a cp cmd to copy the listed files to another directory?
ls | awk -va=$a -vb=$b... (1 Reply)
If I am searching for AA then then BB in a loop, how do I make the output always contain 6 columns of comma separated data even when there may only be 4 search matches?
AA11
AA12
AA13
AA14
BB11
BB12
BB13
BB14
BB15
BB16
Final output:
AA11,AA12,AA13,AA14,,,... (14 Replies)
Hi All,
I am trying a shell script and need your help on taking the results to different output files.
I have tried the below code:
nawk '
{CNF = (length()-10)/7
printf "%9s", substr ($0, 1, 9)
for (i=0; i<=CNF; i++) T = substr ($0, 10+i*7, 7)
TMP = 100 - (T + T + T + T + T + T + T + T... (24 Replies)
Perl::Critic::Policy::BuiltinFunctions::ProhibitStringyEUser3Contributed Perl DocuPerl::Critic::Policy::BuiltinFunctions::ProhibitStringyEval(3pm)NAME
Perl::Critic::Policy::BuiltinFunctions::ProhibitStringyEval - Write "eval { my $foo; bar($foo) }" instead of "eval "my $foo; bar($foo);"".
AFFILIATION
This Policy is part of the core Perl::Critic distribution.
DESCRIPTION
The string form of "eval" is recompiled every time it is executed, whereas the block form is only compiled once. Also, the string form
doesn't give compile-time warnings.
eval "print $foo"; # not ok
eval {print $foo}; # ok
CONFIGURATION
There is an "allow_includes" boolean option for this Policy. If set, then strings that look like they only include a single "use" or
"require" statement (with the possible following statement that consists of a single number) are allowed. With this option set, the
following are flagged as indicated:
eval 'use Foo'; # ok
eval 'require Foo'; # ok
eval "use $thingy;"; # ok
eval "require $thingy;"; # ok
eval "use $thingy; 1;"; # ok
eval "require $thingy; 1;"; # ok
eval 'use Foo; blah;'; # still not ok
eval 'require Foo; 2; 1;'; # still not ok
eval 'use $thingy;'; # still not ok
eval 'no Foo'; # still not ok
If you don't understand why the number is allowed, see Perl::Critic::Policy::ErrorHandling::RequireCheckingReturnValueOfEval.
This option inspired by Ricardo SIGNES' Perl::Critic::Policy::Lax::ProhibitStringyEval::ExceptForRequire.
SEE ALSO
Perl::Critic::Policy::ControlStrucutres::RequireBlockGrep
Perl::Critic::Policy::ControlStrucutres::RequireBlockMap
AUTHOR
Jeffrey Ryan Thalhammer <jeff@imaginative-software.com>
COPYRIGHT
Copyright (c) 2005-2011 Imaginative Software Systems. All rights reserved.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. The full text of this license
can be found in the LICENSE file included with this module.
perl v5.14.2 2012-06-07 Perl::Critic::Policy::BuiltinFunctions::ProhibitStringyEval(3pm)