NAME

ttyname, isatty − find name of a terminal

SYNOPSIS

char ∗ttyname (fildes)
int fildes;

int isatty (fildes)
int fildes;

DESCRIPTION

Ttyname returns a pointer to a string containing 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. 

ERRORS

Isatty or ttyname will fail if any of the following is true:

[EBADF] The fildes argument is invalid. 

[ENOTTY] An inappropriate I/O control operation has been attempted. 

FILES

/dev/∗ /dev/pty/∗

DIAGNOSTICS

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

WARNINGS

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

STANDARDS CONFORMANCE

ttyname: SVID2, XPG2, XPG3, POSIX.1, FIPS 151-1

isatty: SVID2, XPG2, XPG3, POSIX.1, FIPS 151-1

Hewlett-Packard Company  —  HP-UX Release 7.0: Sept 1989