July 2011
Intermediate to advanced
104 pages
2h 14m
English
Content preview from Perl Pocket Reference, 5th Edition
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Information from System Databases
Information About Users
In list context, each of these routines returns a list of values. Use the standard module User::pwent for by-name access to the elements of the list:
Index | Name | Description |
|---|---|---|
0 | name | Username |
1 | passwd | Password info |
2 | uid | ID of this user |
3 | gid | Group ID of this user |
4 | quota | Quota information |
5 | comment | Comments |
6 | gecos | Full name |
7 | dir | Home directory |
8 | shell | Login shell |
9 | expire | Password expiration info |
- endpwent
Ends lookup processing.
- getpwent
Gets next user information.
In scalar context, returns the username.
- getpwnam name
Gets information by name.
In scalar context, returns the user ID.
- getpwuid uid
Gets information by user ID.
In scalar context, returns the username.
- setpwent
Resets lookup processing.
Information About Groups
In list context, each of these routines returns a list of values. Use the standard module User::grent for by-name access to the elements of the list:
Index | Name | Description |
|---|---|---|
0 | name | Group name |
1 | passwd | Password info |
2 | gid | ID of this group |
3 | members | Space-separated list of the login names of the group members |
- endgrent
Ends lookup processing.
- getgrent
Gets next group information.
In scalar context, returns the group name.
- getgrgid gid
Gets information by group ID.
In scalar context, returns the group name.
- getgrnam name
Gets information by name.
In scalar context, returns the group ID.
- setgrent
Resets lookup processing.
Information About Networks
In list context, each of these routines returns a list of values. Use the standard module Net::netent for by-name access:
Index | Name | Description ... |
|---|
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.