Indirect variables in Bash Post: 302769112

9 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

Compound indirect variable references

Using bash, I'm trying to read a .properties file (name=value pairs), assigning an indirect variable reference for each line in the file. The trick is that a property's value string may contain the name of a property that occurred earlier in the file, and I want the name of the 1st property to...

2. Shell Programming and Scripting

Length of an indirect variable

The construct ${#parameter} returns the number of characters in the parameter and ${!parameter} specifies an indirect variable. My question is: How do I combine these two. What I want is ${#!parameter} but this gives an error. Of course I can use: dummy=${!parameter} ${#dummy} but that's a...

3. Shell Programming and Scripting

Bash variables

Ummm can anybody help me with this one? Its prob quite simple. I bascially have a file name say J1x2x3x7.dat Im using the file name as a variable in a bash script. Want I want to do is extract most of the file name and make it a new variable expect with say one of the number now a...

4. Linux

How to get an Indirect Variable Value..?

Hi, I've got a small problem. If varible A stores "B" and Variable B stores C, How to get the value of variable B by using only Variable A..? I tried the following but didnt work pease help.. $ var1=vikram $ echo $var1 vikram $ vikram=sampath $ echo $vikram sampath $ echo...

5. Shell Programming and Scripting

Indirect variable assignment

Hi I have variable A_B=alpha also var1="A" var2="B" I want to retrieve the value alpha using var1 and var2 , somthing like echo ${${var1}_${var2}} that works. Obviously this is receiving syntax error

6. Shell Programming and Scripting

Does SH support indirect expansion like BASH?

Hello, is there a kind soul who can answer me, does the SH support double substitution known as indirect expansion similar to BASH? The syntax for bash is ${!var}. For instance in bash I can write something like this: VAR="value" REF_VAR="VAR" echo ${!REF_VAR} and get the "value"...

7. Shell Programming and Scripting

Indirect Referral Script

I have a file with two columns of numbers (member IDs): 1 1 2 1 3 1 4 2 5 4 6 1 7 5 8 3 9 2 Think of column 1 as the referee and column 2 as the referrer. Is there a good way to backtrack who referred who? I would like an output, for this example here to be: 1 1 2 1 3 1 4 2 1

8. Shell Programming and Scripting

BASH arrays and variables of variables in C++

Sometimes it is handy to protect long scripts in C++. The following syntax works fine for simple commands: #define SHELLSCRIPT1 "\ #/bin/bash \n\ echo \"hello\" \n\ " int main () { cout <<system(SHELLSCRIPT1); return 0; } Unfortunately for there are problems for: 1d arrays:...

9. Shell Programming and Scripting

Passing awk variables to bash variables

Trying to do so echo "111:222:333" |awk -F: '{system("export TESTO=" $2)}'But it doesn't work

LEARN ABOUT DEBIAN

gmt2bin

GMT2BIN(1gmt)						       Generic Mapping Tools						     GMT2BIN(1gmt)

NAME

       gmt2bin - Create bin-index files from gmt files

SYNOPSIS

       gmt2bin listfile [ -Ppath ] [ -V ]

DESCRIPTION

       gmt2bin	reads a file with a list of leg ids, opens each gmt file, and creates a bin-index file for each leg called <legid>.bix.  These are
       used by binlegs to update the system files read by gmtlegs.  Normally, only the data archivist will need to be concerned with these  opera-
       tions.

       listfile
	      This is a one column ASCII file with one leg id pr line.

OPTIONS

       -P     Sets full path to directory with gmtfiles.  [Default is current directory].

       -V     Selects verbose mode, which will send progress reports to stderr [Default runs "silently"].

SEE ALSO

       binlegs(1), dat2gmt(1), GMT(1)

REFERENCES

       Wessel, P., and W. H. F. Smith, 2011, The Generic Mapping Tools (GMT) version 4.5.7 Technical Reference & Cookbook, SOEST/NOAA.
       Wessel, P., and W. H. F. Smith, 1998, New, Improved Version of Generic Mapping Tools Released, EOS Trans., AGU, 79(47), p. 579.
       Wessel, P., and W. H. F. Smith, 1995, New Version of the Generic Mapping Tools Released, EOS Trans., AGU, 76(33), p. 329.
       Wessel, P., and W. H. F. Smith, 1995, New Version of the Generic Mapping Tools Released, http://www.agu.org/eos_elec/95154e.html, Copyright
       1995 by the American Geophysical Union.
       Wessel, P., and W. H. F. Smith, 1991, Free Software Helps Map and Display Data, EOS Trans., AGU, 72(41), p. 441.

GMT 4.5.7							    15 Jul 2011 						     GMT2BIN(1gmt)