Hi All,
I just want to know how to get the executable name of the perl script as i know "$0" will give me the script name but i want to know the executable name which i got it from the script using pp command.
Regards
Raj
Hi.
One solution is to have the original file name set as a variable in the source. One way to do that is to use version control. Here's an example that uses the checkin function of rcs:
#!/usr/bin/env bash
# @(#) s1 Demonstrate retaining original perl source file with pp.
# Utility functions: print-as-echo, print-line-with-visual-space, debug.
# export PATH="/usr/local/bin:/usr/bin:/bin"
pe() { for _i;do printf "%s" "$_i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }
db() { ( printf " db, ";for _i;do printf "%s" "$_i";done;printf "\n" ) >&2 ; }
db() { : ; }
C=$HOME/bin/context && [ -f $C ] && $C perl rcs ci pp
rm -rf RCS p1,v
FILE=p1
cp sacred p1
pl " Input data file $FILE:"
head $FILE
pl " Results, execute perl file without compile:"
./p1
pl " Save file with version control, display new version:"
ci -l -t-"" $FILE
head $FILE
pl " Execute version controlled perl file without compile:"
./p1
pl " Results, save version, compile and execute a.out from pp:"
rm -f a.out
pp $FILE
./a.out
pe
file a.out
pl " Modify, save, run source again:"
sed -i "s/world/people/" $FILE
ci -l $FILE <<<" "
./p1
exit 0
prodiucing:
% ./s1
Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 2.6.26-2-amd64, x86_64
Distribution : Debian GNU/Linux 5.0.8 (lenny)
bash GNU bash 3.2.39
perl 5.10.0
RCS version 5.7
ci RCS version 5.7
pp PAR Packager, version 0.978 (PAR version 0.980)
-----
Input data file p1:
#!/usr/bin/env perl
# @(#) p1 Demonstrate retain source name with version control (rcs, etc.).
$t1 = '$RCSfile$';
$t1 =~ / (\w+),v /;
$program = $1;
print " Hello, world from $0 or $program.\n";
-----
Results, execute perl file without compile:
Hello, world from ./p1 or .
-----
Save file with version control, display new version:
p1,v <-- p1
initial revision: 1.1
done
#!/usr/bin/env perl
# @(#) p1 Demonstrate retain source name with version control (rcs, etc.).
$t1 = '$RCSfile: p1,v $';
$t1 =~ / (\w+),v /;
$program = $1;
print " Hello, world from $0 or $program.\n";
-----
Execute version controlled perl file without compile:
Hello, world from ./p1 or p1.
-----
Results, save version, compile and execute a.out from pp:
Hello, world from ./a.out or p1.
a.out: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.8, stripped
-----
Modify, save, run source again:
p1,v <-- p1
new revision: 1.2; previous revision: 1.1
done
Hello, people from ./p1 or p1.
Several utilities can do this, cvs, subversion, etc. Although git is becoming poepular, I have not tried it.
See man pages for details.
Best wishes ... cheers, drl