hi
another data parsing question. I work on a mac and try to analyse my group IDs

$ sudo dscl . list groups gid
...
_amavisd 83
_appowner 87
_appserveradm 81
_appserverusr 79
_ard 67
_atsserver 97
_calendar 93
_clamav 82
...

the integer values are actually are positioned strictly vertical, the space between the groupname and the ID is filled with spaces. (the forum software removes these spaces)

I guess the solution would be to pipe the output of the command into a file and then loop through every line

$ sudo dscl . list groups gid >> output.txt

and then something like that:

  1 #!/usr/bin/perl
  2 
  3 open(FH, "<output.txt");
  4 while(<FH>)
  5   {
  6     chomp($_);
  7     #parse $_ somehow ...
  8     print("current line: $_ \n");
  9   }
 10 close(FH);

[download]


The question now is. What do I have to do on line 7 in order to find the line with a specific ID, say 87? That would be the following line
...
_appowner 87
...

- how can I find that line?
- how can I extract the group name (_appowner)?

any ideas?

thanks in advance
Ben

In reply to finding a value in a list by baurel

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