2
votes
2answers
35 views

Optional arguments after or before the mandatory arguments?

I'm creating a shell script and I need it to take two mandatory arguments and one optional. How do I check that? In most scripts I've seen, the optional arguments are passed before the mandatory ones, ...
3
votes
4answers
185 views

Test if command accepts a specific option

What is the preferred way to test if a command takes an option? What are the caveats? As a motivating example, at login my shell aliases grep to add several --exclude-dir options but this option is ...
8
votes
1answer
204 views

How to append multiple lines to a file with bash, with “--” in front of string

Question very similar to How to append multiple lines to a file with bash but I want to start the file with --, and also append to the file, if possible. printf ...
2
votes
4answers
1k views

Parsing process command-line arguments from pargs in a shell script

I get list of PIDs in my bash scripts (Java processes) and have to analyze their command-line arguments to determine which instance of server each PID corresponds to. At the moment I do it that way ...
2
votes
2answers
442 views

Passing options to subcommands in bash

I'm scripting a sequence of commands I used to enter by hand. The rough outline goes something like this $ echo ${FILENAME_ARGS} | some | big | pipeline | sort -options | etc >temp $ gs ...
12
votes
1answer
11k views

How can I execute local script on remote machine and include arguments?

I have written a script that runs fine when executed locally: ./sysMole -time Aug 18 18 The arguments "-time", "Aug", "18", and "18" are successfully passed on to the script. Now, this script is ...
8
votes
3answers
6k views

getopt, getopts or manual parsing - what to use when I want to support both short and long options?

Currently I'm writing a Bash script which has the following requirements: it should run on a wide variety of Unix/Linux platforms it should support both short and (GNU) long options I know that ...
5
votes
1answer
760 views

In the usage string of my custom shell script, shall I also display --help and --version?

I'm currently developing a shell script, called up, which shows a usage string on the commandline when called with --help. The output looks like this: $ up --help usage: up [-n ...
1
vote
1answer
318 views

What is the canonical way to implement order independent options in bash scripts? [duplicate]

Possible Duplicate: How do I handle switches in a shell script? Most common shell commands allow the user to specify options in any random order. Positional Parameters like $1 as commonly ...
0
votes
1answer
384 views

How does “options” in shell scripting work?

I found some code in one of the answers here and accommodated it to my needs but now I have two questions: Q1: how can I display the options text after the code in case statement finishes? So the ...
9
votes
4answers
5k views

How do I handle switches in a shell script?

Are there some built-in tools that will recognize -x and --xxxx as switches, and not arguments, or do you have to go through all the input variables, test for dashes, and then parse the arguments ...
3
votes
2answers
4k views

How to catch optioned and non optioned arguments correctly?

I want to write a shell script which will take some arguments with some options and print that arguments. Suppose the name of that script is abc.ksh. Usage of that script is - ./abc.ksh -[a ...