Serial Port/Com Port

Operating Systems Linux Red Hat Serial Port/Com Port

04-14-2009

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Serial Port/Com Port

System: Red Hat Enterprise Linux WS release 4 (Nahant Update 6)

Any idea how to Determine if a Serial Port in Linux System is defective?
Issued "cat /proc/tty/driver/serial". see below.

Code:

[root@arsenic] ~# cat /proc/tty/driver/serial
serinfo:1.0 driver revision:
0: uart:16550A port:000003F8 irq:4 tx:11 rx:0 RTS|CTS|DTR|DSR|RI
1: uart:unknown port:000002F8 irq:3
2: uart:unknown port:000003E8 irq:4
3: uart:unknown port:000002E8 irq:3
4: uart:16550A port:0000EC98 irq:185 tx:11 rx:0 CTS|DSR|CD
5: uart:unknown port:00000000 irq:0
6: uart:unknown port:00000000 irq:0
7: uart:unknown port:00000000 irq:0
8: uart:unknown port:00000000 irq:0
9: uart:unknown port:00000000 irq:0
.....

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mod_security

mod_security(3erl)					     Erlang Module Definition						mod_security(3erl)

NAME

       mod_security - Security Audit and Trailing Functionality

DESCRIPTION

       Security Audit and Trailing Functionality

EXPORTS

       list_auth_users(Port) -> Users | []
       list_auth_users(Address, Port) -> Users | []
       list_auth_users(Port, Dir) -> Users | []
       list_auth_users(Address, Port, Dir) -> Users | []

	      Types  Port = integer()
		     Address = {A,B,C,D} | string() | undefined
		     Dir = string()
		     Users = list() = [string()]

	      list_auth_users/1  ,  list_auth_users/2  and list_auth_users/3 returns a list of users that are currently authenticated. Authentica-
	      tions are stored for SecurityAuthTimeout seconds, and are then discarded.

       list_blocked_users(Port) -> Users | []
       list_blocked_users(Address, Port) -> Users | []
       list_blocked_users(Port, Dir) -> Users | []
       list_blocked_users(Address, Port, Dir) -> Users | []

	      Types  Port = integer()
		     Address = {A,B,C,D} | string() | undefined
		     Dir = string()
		     Users = list() = [string()]

	      list_blocked_users/1 , list_blocked_users/2 and list_blocked_users/3 returns a list of users that are currently blocked from access.

       block_user(User, Port, Dir, Seconds) -> true | {error, Reason}
       block_user(User, Address, Port, Dir, Seconds) -> true | {error, Reason}

	      Types  User = string()
		     Port = integer()
		     Address = {A,B,C,D} | string() | undefined
		     Dir = string()
		     Seconds = integer() | infinity
		     Reason = no_such_directory

	      block_user/4 and block_user/5 blocks the user User from the directory Dir for a specified amount of time.

       unblock_user(User, Port) -> true | {error, Reason}
       unblock_user(User, Address, Port) -> true | {error, Reason}
       unblock_user(User, Port, Dir) -> true | {error, Reason}
       unblock_user(User, Address, Port, Dir) -> true | {error, Reason}

	      Types  User = string()
		     Port = integer()
		     Address = {A,B,C,D} | string() | undefined
		     Dir = string()
		     Reason = term()

	      unblock_user/2 , unblock_user/3 and unblock_user/4 removes the user User from the list of blocked users for the Port (and Dir) spec-
	      ified.

THE SECURITYCALLBACKMODULE

       The  SecurityCallbackModule is a user written module that can receive events from the mod_security Erlang Webserver API module. This module
       only exports the function(s), event/4,5 , which are described below.

EXPORTS

       event(What, Port, Dir, Data) -> ignored
       event(What, Address, Port, Dir, Data) -> ignored

	      Types  What = atom()
		     Port = integer()
		     Address = {A,B,C,D} | string() <v>Dir = string()
		     Data = [Info]
		     Info = {Name, Value}

	      event/4 or event/4 is called whenever an event occurs in the mod_security Erlang Webserver API module ( event/4 is called if Address
	      is  undefined and event/5 otherwise). The What argument specifies the type of event that has occurred, and should be one of the fol-
	      lowing reasons; auth_fail (a failed user authentication), user_block (a user is being blocked from access) or user_unblock  (a  user
	      is being removed from the block list).

   Note:
       Note that the user_unblock event is not triggered when a user is removed from the block list explicitly using the unblock_user function.

Ericsson AB							    inets 5.5.2 						mod_security(3erl)

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