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Full Discussion: Nested for loops
Top Forums Shell Programming and Scripting Nested for loops Post 302546237 by jacksolm on Wednesday 10th of August 2011 07:18:35 PM
Old 08-10-2011
Nested for loops
Greetings All,

The following script attempts to enumerate all users in all groups in the group file(GROUP) and echo the following information:

GROUP ---> USER

The script is as follows:

Code:
IFS=","
for GROUP in `ypcat -k group | cut -d" " -f1`
    do
        for USER in `ypcat -k group | grep $GROUP | cut -d":" -f4`
             do
                   echo "$GROUP -------> $USER"
             done
    done

The unexpected result is that the group name is only printed. It appears that the outer loop variable loses scope inside of the inner loop.

Any ideas on why this occurs is greatly appreciated.
Last edited by vbe; 08-11-2011 at 10:17 AM.. Reason: code tags
 

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LEARN ABOUT HPUX

ftpgroups

ftpgroups(4)						     Kernel Interfaces Manual						      ftpgroups(4)

NAME

       ftpgroups - group password file for use with the SITE GROUP and SITE GPASS commands.

SYNOPSIS

DESCRIPTION

       The file is the group password file for use with the SITE GROUP and SITE GPASS commands.

       To enable the use of this file, the entry must be made in the configuration file

       This file contains an alphanumeric string, encrypted password, and the actual group name from the file.	Each entry is separated by After a
       user logs in, the SITE GROUP and SITE GPASS commands may be used to specify an enhanced access group and associated password.  If the group
       name and password are valid, the user becomes (via a member of the group specified in the group access file,

       The format of the group access file is:

       where  access_group_name  is  an  arbitrary  (alphanumeric  and/or  punctuation)  string.  encrypted_password is the password encrypted via
       crypt(3), exactly like in real_group_name is the name of a valid group listed in

       NOTE: For this option to work for anonymous FTP users, the ftp server must keep permanently open and the group access file is  loaded  into
       memory.	This means that:

	      (1)  the ftp server now has an additional file descriptor open, and

	      (2)  the	necessary  passwords  and access privileges granted to users via SITE GROUP will be static for the duration of an FTP ses-
		   sion.

       If you have an urgent need to change the access groups and/or passwords *NOW*, then kill all of the running FTP servers.

FILES

AUTHOR

       was developed by the Washington University, St. Louis, Missouri.

SEE ALSO

       ftpaccess(4).

																      ftpgroups(4)
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