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how to get index/postion of a string?


 
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# 1  
how to get index/postion of a string?

Hi,

I have a string like the following:

/db1/data/GLIDER/SYSTEM.dbf

need to find the postion where "SYSTEM.dbf" starts, so I tried:

LOCATION=/db1/data/GLIDER/SYSTEM.dbf

$ expr index $LOCATION SYSTEM
expr: syntax error

$ expr index "$LOCATION" SYSTEM
expr: syntax error

What am I doing wrong there?

Thanks in Advance.

Last edited by seafan; 03-11-2011 at 05:27 PM..
# 2  
What is your system? What is your shell?
# 3  
Quote:
Originally Posted by Corona688
What is your system? What is your shell?

$ uname -a
SunOS demccuatux02 5.10 Generic_127127-11 sun4us sparc FJSV,GPUZC-M

$ ps -ef | grep $$
oracle 28321 28393 0 16:23:20 pts/1 0:00 -ksh
oracle 6138 28321 0 16:58:25 pts/1 0:00 grep 28321

I just found out that "index" is not in the path -


$ which index
no index in /local/app/oracle/product/10.2.0/db_1/bin /local/app/oracle/product/10.2.0/db_1/OPatch /usr/bin .


now the question becomes, are there certain version of unix that doesn't include commands like index? how to figure out the path to it if they are there?
# 4  
index isn't a literal command, it's part of the expr utility or builtin. Since many shells have it as a shell builtin, what features you get may depend on what shell you use.

You could try forcing it to use an external expr by giving expr's absolute path, i.e. /bin/expr
# 5  
Question

Quote:
Originally Posted by Corona688
index isn't a literal command, it's part of the expr utility or builtin. Since many shells have it as a shell builtin, what features you get may depend on what shell you use.

You could try forcing it to use an external expr by giving expr's absolute path, i.e. /bin/expr

thanks for clarifying that. so the question is back to, why am I getting a syntax error?
# 6  
As you are using Solaris it is likely that index is not part of the expr functionality.In fact the expr man page on Solaris says that it is for interactive use only. You will have to use another method such as deleting that portion from the string and counting the length, or using a perl one-liner.

Andrew
 

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