Need direction to make code for cellphone in C,C++ or Perl

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chfn

CHFN(1) 						      Linux Reference Manual							   CHFN(1)

NAME

       chfn - change your finger information

SYNOPSIS

       chfn [ -f full-name ] [ -o office ] [ -p office-phone ] [ -h home-phone ] [ -u ] [ -v ] [ username ]

DESCRIPTION

       chfn  is  used  to change your finger information.  This information is stored in the /etc/passwd file, and is displayed by the finger pro-
       gram.  The Linux finger command will display four pieces of information that can be changed by chfn : your real name, your  work  room  and
       phone, and your home phone.

   COMMAND LINE
       Any  of	the  four pieces of information can be specified on the command line.  If no information is given on the command line, chfn enters
       interactive mode.

   INTERACTIVE MODE
       In interactive mode, chfn will prompt for each field.  At a prompt, you can enter the new information, or just press return  to	leave  the
       field unchanged.  Enter the keyword "none" to make the field blank.

OPTIONS

       -f, --full-name
	      Specify your real name.

       -o, --office
	      Specify your office room number.

       -p, --office-phone
	      Specify your office phone number.

       -h, --home-phone
	      Specify your home phone number.

       -u, --help
	      Print a usage message and exit.

       -v, --version
	      Print version information and exit.

SEE ALSO

       finger(1), passwd(5)

AUTHOR

       Salvatore Valente <svalente@mit.edu>

chfn								  October 13 1994							   CHFN(1)

Linux