Information from System Files

passwd

Returns ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell).

• endpwent
• Ends lookup processing.
• getpwent
• Gets next user information.
• getpwnam name
• Gets information by name.
• getpwuid uid
• Gets information by user ID.
• setpwent
• Resets lookup processing.

group

Returns ($name, $passwd, $gid, $members).

• endgrent
• Ends lookup processing.
• getgrgid gid
• Gets information by group ID.
• getgrnam name
• Gets information by name.
• getgrent
• Gets next information.
• setgrent
• Resets lookup processing.

hosts

Returns ($name, $aliases, $addrtype, $length, @addrs).

• endhostent
• Ends lookup processing.
• gethostbyaddr addr, addrtype
• Gets information by IP address.
• gethostbyname name
• Gets information by hostname.
• gethostent
• Gets next host information.
• sethostent stayopen
• Resets lookup processing.

networks

Returns ($name, $aliases, $addrtype, $net).

• endnetent
• Ends lookup processing.
• getnetbyaddr addr, type
• Gets information by address and type.
• getnetbyname name
• Gets information by network name.
• getnetent
• Gets next network information.
• setnetent stayopen
• Resets lookup processing.

services

Returns ($name, $aliases, $port, $proto).

• endservent
• Ends lookup processing.
• getservbyname name, proto
• Gets information by service name.
• getservbyport port, proto
• Gets information by service port.
• getservent
• Gets next service information.
• setservent stayopen
• Resets lookup processing.

protocols

Returns ($name, $aliases, $proto).

• endprotoent
• Ends lookup processing.
• getprotobyname name
• Gets information by protocol name.
• getprotobynumber number
• Gets information by protocol number.
• getprotoent
• Gets next protocol information.
• setprotoent stayopen
• Resets lookup processing.