ttyname(3C) — Interactive 2.2



          TTYNAME(3C)          INTERACTIVE UNIX System          TTYNAME(3C)



          NAME
               ttyname, isatty - find name of a terminal

          SYNOPSIS
               char *ttyname (fildes)
               int fildes;

               int isatty (fildes)
               int fildes;

          DESCRIPTION
               The ttyname function returns a pointer to a string contain-
               ing the null-terminated path name of the terminal device
               associated with file descriptor fildes.

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

          FILES
               /dev/*

          DIAGNOSTICS
               The ttyname function returns a NULL pointer if fildes does
               not describe a terminal device in directory /dev.

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



























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