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Full Discussion: How to get list of user into an array..
Top Forums Shell Programming and Scripting How to get list of user into an array.. Post 302452069 by pludi on Thursday 9th of September 2010 04:46:10 AM
Old 09-09-2010
To emulate cut:
Code:
open my $group, '<', '/etc/group';
my @groups = map { my @a = split /:/; $a[0] . ':' . $a[2] } <$group>;
close $group;

To create a hash mapped on the group name:
Code:
open my $group, '<', '/etc/group';
my %groups = map { my @a = split /:/; $a[0], $a[2] } <$group>;
close $group;

 

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LEARN ABOUT FREEBSD

getgrouplist

GETGROUPLIST(3) 					   BSD Library Functions Manual 					   GETGROUPLIST(3)

NAME

     getgrouplist -- calculate group access list

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <unistd.h>

     int
     getgrouplist(const char *name, gid_t basegid, gid_t *groups, int *ngroups);

DESCRIPTION

     The getgrouplist() function reads through the group file and calculates the group access list for the user specified in name.  The basegid is
     automatically included in the groups list.  Typically this value is given as the group number from the password file.

     The resulting group list is returned in the array pointed to by groups.  The caller specifies the size of the groups array in the integer
     pointed to by ngroups; the actual number of groups found is returned in ngroups.

RETURN VALUES

     The getgrouplist() function returns 0 on success and -1 if the size of the group list is too small to hold all the user's groups.	Here, the
     group array will be filled with as many groups as will fit.

FILES

     /etc/group  group membership list

SEE ALSO

     setgroups(2), initgroups(3)

HISTORY

     The getgrouplist() function first appeared in 4.4BSD.

BSD
								 October 26, 2014							       BSD
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