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Top Forums Shell Programming and Scripting Conversion of Perl Script to Shell Script.. Post 302929363 by ongoto on Friday 19th of December 2014 07:24:27 PM
Old 12-19-2014
Good. We all agree. Smilie

The shell is the coders swiss army knife. But to use it exclusively out of prejudice is cheating yourself. OO languages do have a lot to offer if you need to pass around groups of data all in one go and that sort of thing. The shell now has associative arrays, but they don't stay ordered. Try looping through them. Try passing an array to a function. There goes your indexes. But that doesn't make the shell bad. You're gonna hit a wall in the others too.

In Perl you always end up making calls to the shell because it saves work. Why write a block of Perl code to do 'uname -r'? On the other hand, Perl lets you do things like "do something unless condition", or "if condition, etc" all in one statement. If Perl can save you some work, then why not use it.? Same with Python and the others mentioned. What would we shell coders do without Awk and Sed and Grep?

Ya got tools that are metric, some are std SAE, and then there are the 'star' bits and the universal sockets. But you can't cut down a tree with a phillips!

Cheers mates Smilie

Quote:
Originally Posted by wisecracker
Hi ongoto...
Let me know when PERL, Python or nearly any other language for that matter, can do this:-

Is there anything the shell can't do?
...
Awesome.
AE6UB said that. Smilie
 

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SCRIPT(1)						    BSD General Commands Manual 						 SCRIPT(1)

NAME
script -- make typescript of terminal session SYNOPSIS
script [-a] [-f] [-q] [-t] [file] DESCRIPTION
Script makes a typescript of everything printed on your terminal. It is useful for students who need a hardcopy record of an interactive session as proof of an assignment, as the typescript file can be printed out later with lpr(1). If the argument file is given, script saves all dialogue in file. If no file name is given, the typescript is saved in the file typescript. Options: -a Append the output to file or typescript, retaining the prior contents. -f Flush output after each write. This is nice for telecooperation: One person does `mkfifo foo; script -f foo' and another can super- vise real-time what is being done using `cat foo'. -q Be quiet. -t Output timeing data to standard error. This data contains two fields, separated by a space. The first field indicates how much time elapsed since the previous output. The second field indicates how many characters were output this time. This information can be used to replay typescripts with realistic typing and output delays. The script ends when the forked shell exits (a control-D to exit the Bourne shell (sh(1)), and exit, logout or control-d (if ignoreeof is not set) for the C-shell, csh(1)). Certain interactive commands, such as vi(1), create garbage in the typescript file. Script works best with commands that do not manipulate the screen, the results are meant to emulate a hardcopy terminal. ENVIRONMENT
The following environment variable is utilized by script: SHELL If the variable SHELL exists, the shell forked by script will be that shell. If SHELL is not set, the Bourne shell is assumed. (Most shells set this variable automatically). SEE ALSO
csh(1) (for the history mechanism), replay(1). HISTORY
The script command appeared in 3.0BSD. BUGS
Script places everything in the log file, including linefeeds and backspaces. This is not what the naive user expects. Linux July 30, 2000 Linux
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