Sponsored Content
Top Forums Shell Programming and Scripting Arguments in variable vs direct string Post 302985487 by Scrutinizer on Thursday 10th of November 2016 07:01:01 AM
Old 11-10-2016
That is double parsing/interpretation. It is equivalent to
Code:
eval /.arguments_count.sh "$my_args"

Which has the same security concerns unless you are in control of the input..




----
Quote:
Originally Posted by bakunin
Code:
$ my_args="a b c \'d e\' f g"
$ arguments_count.sh $my_args

Hi Bakunin, this would offer no different result, since the since the unquoted variable expansion of my_args would still be subjected to field splitting into 7 arguments:

Code:
$ printf "%s\n" $my_args
a
b
c
\'d
e\'
f
g

within the same parsing run, there is no way to recover the intended quoted fields from the string contained in the variable, if it is subjected to field splitting with the standard IFS.

Last edited by Scrutinizer; 11-10-2016 at 08:08 AM..
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Joining string arguments

Hi, how can I join given arguments (not starting from the first one) to form one string, each argument separated by a space. For example, out of 5 given arguments, I'll like to start joining from the 3rd to the last. In python there exists something like ' '.join(sys.argv) and it starts joining... (5 Replies)
Discussion started by: plhelpme
5 Replies

2. Shell Programming and Scripting

How to call arguments with variable in a script??

Hello, I was wondering if it were possible to call arguments passed to a script using a variable. For example: sh script.sh yes no good bad x=$# while do echo (last argument, then second last etc until first argument) let x=($x-1) done should print out bad good no (4 Replies)
Discussion started by: VanK
4 Replies

3. Shell Programming and Scripting

How to make bash wrapper for java/groovy program with variable length arguments lists?

The following bash script does not work because the java/groovy code always thinks there are four arguments even if there are only 1 or 2. As you can see from my hideous backslashes, I am using cygwin bash on windows. export... (1 Reply)
Discussion started by: siegfried
1 Replies

4. Shell Programming and Scripting

Print arguments with the help of variable

Let's say I want to print the arguments $4 till $#, how can I do this? $# contains the number of arguments $@ contain all the arguments as string What i need is something like for i in $4_till_$#; do #do something with $i convert $i ~/$output done The first 3 arguments are used as options... (6 Replies)
Discussion started by: hakermania
6 Replies

5. Shell Programming and Scripting

string manipulation in arguments

Hi all, I have a requirement where I am taking the first argument as argument name and storing the second argument in argument name as value. Thanks to ppl here, i learnt to do it.:p while ( $1 != "" ) set arg = $1 shift set val = "$1" echo "set... (2 Replies)
Discussion started by: animesharma
2 Replies

6. Shell Programming and Scripting

Removing command line arguments from string list

I am passing a list of strings $list and want to remove all entries with --shift=number, --sort=number/number/..., --group=number/number/... Also are removed whether upper or lower case letters are used For example the following will all be deleted from the list --shift=12 --shift=2324... (7 Replies)
Discussion started by: kristinu
7 Replies

7. Shell Programming and Scripting

Manipulating sed Direct Input to Direct Output

Hi guys, been scratching round the forums and my mountain of resources. Maybe I havn't read deep enough My question is not how sed edits a stream and outputs it to a file, rather something like this below: I have a .txt with some text in it :rolleyes: abc:123:xyz 123:abc:987... (7 Replies)
Discussion started by: the0nion
7 Replies

8. Shell Programming and Scripting

Processing arguments in a string

Hi The following code works when reading the arguments from the command line but fails when I try to read from a string. So this works while ; do case $1 in -dbversion) if '`" ]; then { echo "ERROR: missing value for '$1' (seen '$2')"; usage; exit 1; } else { shift;... (6 Replies)
Discussion started by: user052009
6 Replies

9. Shell Programming and Scripting

ksh parsing arguments in a string rather than from the cmdln

Hi. I have a piece of code that reads and parses command line options. I'd like to alter it slightly to read from a string (that's set elsewhere in the script) rather than directly from the command line (arg). Can somebody show me how to do this? Many thanks. My code is as follows: typeset... (6 Replies)
Discussion started by: user052009
6 Replies

10. UNIX for Beginners Questions & Answers

Check if string variable is a subset of another string variable

Below is my ksh shell script where I need to check if variable fileprops is a subset of $1 argument. echo "FILE PROPERTY: $fileprops" echo "PARAMETER3: $1" if ; then echo "We are Good. $line FILE is found to be INTACT !! " else echo... (2 Replies)
Discussion started by: mohtashims
2 Replies
NPM-RUN-SCRIPT(1)                                                                                                                NPM-RUN-SCRIPT(1)

NAME
npm-run-script - Run arbitrary package scripts SYNOPSIS
npm run-script <command> [--silent] [-- <args>...] alias: npm run DESCRIPTION
This runs an arbitrary command from a package's "scripts" object. If no "command" is provided, it will list the available scripts. run[-script] is used by the test, start, restart, and stop commands, but can be called directly, as well. When the scripts in the package are printed out, they're separated into lifecycle (test, start, restart) and directly-run scripts. As of ` https://blog.npmjs.org/post/98131109725/npm-2-0-0, you can use custom arguments when executing scripts. The special option -- is used by getopt https://goo.gl/KxMmtG to delimit the end of the options. npm will pass all the arguments after the -- directly to your script: npm run test -- --grep="pattern" The arguments will only be passed to the script specified after npm run and not to any pre or post script. The env script is a special built-in command that can be used to list environment variables that will be available to the script at run- time. If an "env" command is defined in your package, it will take precedence over the built-in. In addition to the shell's pre-existing PATH, npm run adds node_modules/.bin to the PATH provided to scripts. Any binaries provided by locally-installed dependencies can be used without the node_modules/.bin prefix. For example, if there is a devDependency on tap in your package, you should write: "scripts": {"test": "tap test/*.js"} instead of "scripts": {"test": "node_modules/.bin/tap test/*.js"} to run your tests. The actual shell your script is run within is platform dependent. By default, on Unix-like systems it is the /bin/sh command, on Windows it is the cmd.exe. The actual shell referred to by /bin/sh also depends on the system. As of ` https://github.com/npm/npm/releases/tag/v5.1.0 you can customize the shell with the script-shell configuration. Scripts are run from the root of the module, regardless of what your current working directory is when you call npm run. If you want your script to use different behavior based on what subdirectory you're in, you can use the INIT_CWD environment variable, which holds the full path you were in when you ran npm run. npm run sets the NODE environment variable to the node executable with which npm is executed. Also, if the --scripts-prepend-node-path is passed, the directory within which node resides is added to the PATH. If --scripts-prepend-node-path=auto is passed (which has been the default in npm v3), this is only performed when that node executable is not found in the PATH. If you try to run a script without having a node_modules directory and it fails, you will be given a warning to run npm install, just in case you've forgotten. You can use the --silent flag to prevent showing npm ERR! output on error. You can use the --if-present flag to avoid exiting with a non-zero exit code when the script is undefined. This lets you run potentially undefined scripts without breaking the execution chain. SEE ALSO
o npm help 7 scripts o npm help test o npm help start o npm help restart o npm help stop o npm help 7 config January 2019 NPM-RUN-SCRIPT(1)
All times are GMT -4. The time now is 08:11 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy