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TTYNAME(3)                 Library Functions Manual                 TTYNAME(3)



NAME
       ttyname, isatty, ttyslot - find name of a terminal

SYNOPSIS
       char *ttyname(filedes)

       isatty(filedes)

       ttyslot()

DESCRIPTION
       Ttyname  returns a pointer to the null-terminated path name of the ter-
       minal device associated with file descriptor filedes (this is a  system
       file  descriptor and has nothing to do with the standard I/O FILE type-
       def).

       Isatty returns 1 if filedes is associated with  a  terminal  device,  0
       otherwise.

       Ttyslot  returns  the  number  of the entry in the ttys(5) file for the
       control terminal of the current process.

FILES
       /dev/*
       /etc/ttys

SEE ALSO
       ioctl(2), ttys(5)

DIAGNOSTICS
       Ttyname returns a null pointer (0) if filedes does not describe a  ter-
       minal device in directory `/dev'.

       Ttyslot returns 0 if `/etc/ttys' is inaccessible or if it cannot deter-
       mine the control terminal.

BUGS
       The return value points to static data whose content is overwritten  by
       each call.



                                19 January 1983                     TTYNAME(3)