Bash: Reading 2 arguments from a command line


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Bash: Reading 2 arguments from a command line
# 1  
Old 12-08-2005
Bash: Reading 2 arguments from a command line

If no arguments are entered I wanna be able to read 2 arguments, i have done like this but it doesnt work:

x=0

until [ $x -eq 1 ] #loop starts

do

if [ $# -eq 0 ]; then
echo No arguments were entered, please enter 2 arguments.
read $1 $2

elif [ $# -gt 2 ] || [ $# -lt 2 ]; then
echo $# arguments were entered, please enter 2 arguments.
read $1 $2
else
x=1
fi
done


How can i fix it?
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Wanted: Help with escaping bash command line arguments

Please forgive me if this is the wrong forum. I want to execute some one liners with the groovy programming language and I'm having trouble escaping the special characters to accommodate bash. Here is one of the lines that is giving me trouble: groovy -e "(new... (1 Reply)
Discussion started by: siegfried
1 Replies

2. Programming

Reading command line arguments and setting up values if option not provided

I have a C++ program. I read command line arguments, but if the value is not supplied, I default or make a calculation. Let's say I set it to a default value. I can code this in several ways. Here I show three ways. What would be the best way for maintaining this code? The program will get very... (2 Replies)
Discussion started by: kristinu
2 Replies

3. Shell Programming and Scripting

Reading command line options from bash script

I have the following code and I am calling it using ./raytrac.bash -u and getting problems. For some reason opt_usage is still 0. opt_usage=0 iarg=0 narg=$# while (($iarg < $narg)) do (( iarg = $iarg + 1 )) arg=$argv usrInputFlag=`echo $arg | awk '/=/ {print 1}; ! /=/... (22 Replies)
Discussion started by: kristinu
22 Replies

4. UNIX for Dummies Questions & Answers

Accepting command line arguments in bash

I have this tcsh code that I want to convert to a bash script. Basically it accepts command line arguments supplied by the user and stores them, so they can be used to run a C++ program. set arg_browseDir_inFileLst = "" set allArgsUpCase = `echo "$*" | tr '' ''` set opt_browseDir_flag =... (17 Replies)
Discussion started by: kristinu
17 Replies

5. Shell Programming and Scripting

Passing arguments from a bash shell script to a command

I'm pretty new to bash scripting and I've found myself writing things like this (and the same with even more nesting): if $CATEGORIES; then if $LABEL_SLOTS; then $pyth "$wd/texify_grammar.py" "$input" "$texfile" "--label-slots" "--categories" "$CATEGORY_LIST" ... (9 Replies)
Discussion started by: burbly
9 Replies

6. UNIX for Dummies Questions & Answers

command line arguments

hi, can someone how to accept command line arguments as a variable using in script? like: ./scriptname arguments by accept arguments, I can use it in my script? thx! (1 Reply)
Discussion started by: ikeQ
1 Replies

7. Shell Programming and Scripting

Help parsing command line arguments in bash

Looking for a little help parsing some command line arguments in a bash script I am working on, this is probably fairly basic to most, but I do not have much experience with it. At the command line, when the script is run, I need to make sure the argument passed is a file, it exists in the... (3 Replies)
Discussion started by: Breakology
3 Replies

8. UNIX for Dummies Questions & Answers

Command line arguments.

I am working on a script wherein i need the user to enter the Build ID for eg:the command line will show enter the build ID Now on entering the build ID it should be assigned to @ARGV. How can this be done.? (1 Reply)
Discussion started by: Varghese
1 Replies

9. Shell Programming and Scripting

command line arguments

-------------------------------------------------------------------------------- I have this while loop and at the end I am trying to get it to tell me the last argument I entered. And with it like this all I get is the sentence with no value for $1. Now I tried moving done after the sentence... (1 Reply)
Discussion started by: skooly5
1 Replies

10. Programming

command line arguments

Hi How to pass multi line text as a command line argument to a program. (i.e) ./a.out hi this is sample 0 file1 where hi this is sample should be stored in argv 0 in argv and so on... (3 Replies)
Discussion started by: bankpro
3 Replies
Login or Register to Ask a Question
APPLY(1)						    BSD General Commands Manual 						  APPLY(1)

NAME
apply -- apply a command to a set of arguments SYNOPSIS
apply [-a c] [-d] [-#] command argument ... DESCRIPTION
The apply utility runs the named command on each argument argument in turn. Character sequences of the form ``%d'' in command, where 'd' is a digit from 1 to 9, are replaced by the d'th following unused argument. In this case, the largest digit number of arguments are discarded for each execution of command. The options are as follows: -# Normally arguments are taken singly; the optional number -# specifies the number of arguments to be passed to command. If the number is zero, command is run, without arguments, once for each argument. If any sequences of ``%d'' occur in command, the -# option is ignored. -a c The use of the character '%' as a magic character may be changed with the -a option. -d Display the commands that would have been executed, but do not actually execute them. ENVIRONMENT
The following environment variable affects the execution of apply: SHELL Pathname of shell to use. If this variable is not defined, the Bourne shell is used. FILES
/bin/sh default shell EXAMPLES
apply echo * is similar to ls(1); apply -2 cmp a1 b1 a2 b2 a3 b3 compares the `a' files to the `b' files; apply -0 who 1 2 3 4 5 runs who(1) 5 times; and apply 'ln %1 /usr/joe' * links all files in the current directory to the directory /usr/joe. HISTORY
The apply command appeared in 4.2BSD. AUTHORS
Rob Pike BUGS
Shell metacharacters in command may have bizarre effects; it is best to enclose complicated commands in single quotes (''). The apply utility does not recognize multibyte characters. BSD
December 13, 2006 BSD