isatty(3C) — sys5 — Apollo Domain/OS SR10.4.1

TTYNAME(3C)                          SysV                          TTYNAME(3C)



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

SYNOPSIS
     char *ttyname (fildes)
     int fildes;

     int ttyname_r (fildes, buffer, len)
     int fildes;
     char *buffer;
     int len;

     int isatty (fildes)
     int fildes;

DESCRIPTION
     ttyname returns a pointer to a string containing the null terminated
     pathname of the terminal device associated with file descriptor fildes.

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

     ttyname_r function is the reentrant version of the ttyname function.

FILES
     /dev/*

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

     The ttyname_r function returns 0 (zero) if successful.  Otherwise, -1 is
     returned.

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