RE: Unix question

[Brian MacLean]

The UNIX command "sed", "awk", and "tr" offer a world of solutions for altering text.   Using Ksh93 you can do substringing.  You can find it on Aix, and Sun system in the form of "dtksh".  The syntax is:       #!/usr/dt/bin/dtksh     ...cut...     myvar=${myvarin:startpos:length}     ...rest...   To edit a file on the fly use the old "edit" command.  An example follows:       3925:oratst@marge> cat /tmp/abc     aaaaaaaaaaaabbbbbbbbbbbbbbbbbccccccccccccccc     $HOSTNAME$.$SCHEMA$     11111111111112222222222222222223333333333333     3925:oratst@marge>     3925:oratst@marge> edit /tmp/abc <<\EOF     > 1,$s/\$HOSTNAME\$/MYBOX/g     > 1,$s/\$SCHEMA\$/MYSCHEMA/g     > w     > q     > EOF     "/tmp/abc" 3 lines, 110 characters     MYBOX.$SCHEMA$     MYBOX.MYSCHEMA     "/tmp/abc" 3 lines, 105 characters     3925:oratst@marge>     3925:oratst@marge>     3925:oratst@marge> cat /tmp/abc     aaaaaaaaaaaabbbbbbbbbbbbbbbbbccccccccccccccc     MYBOX.MYSCHEMA     11111111111112222222222222222223333333333333     3925:oratst@marge>     3925:oratst@marge> -----Original Message----- From: Big Planet [mailto:[EMAIL PROTECTED]] Sent: Friday, March 23, 2001 6:56 PM To: Multiple recipients of list ORACLE-L Subject: Unix question Hi geeks , How can I do substr and instr kind of operaion in unix shell script . is it possible ? like i have one paramter as "hostname" .. I want to trim quotes surrounding the hostname . One more question , is possible to read another text file line by line using a shel script and then edit that file . Actually I have this configuration file for my system which have keywords like $HOSTNAME$ , $SCHEMA$ which I want to replace with actual values at the time of installation by asking questions to the user.   TIA --Big planet