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CTERMID (3) | C library functions | Unix Manual Pages | :man

NAME

ctermid - generate terminal pathname

CONTENTS

Library
Synopsis
Description
Return Values
Errors
See Also
Standards
Bugs

LIBRARY


.Lb libc

SYNOPSIS


.In stdio.h char * ctermid "char *buf" char * ctermid_r "char *buf"

DESCRIPTION

The ctermid function generates a string, that, when used as a pathname, refers to the current controlling terminal of the calling process.

If buf is the NULL pointer, a pointer to a static area is returned. Otherwise, the pathname is copied into the memory referenced by buf. The argument buf is assumed to be at least L_ctermid (as defined in the include file
.In stdio.h ) bytes long.

The ctermid_r function provides the same functionality as ctermid except that if buf is a NULL pointer, NULL is returned.

The current implementation simply returns ‘/dev/tty’.

RETURN VALUES

Upon successful completion, a non- NULL pointer is returned. Otherwise, a NULL pointer is returned and the global variable errno is set to indicate the error.

ERRORS

The current implementation detects no error conditions.

SEE ALSO

ttyname(3)

STANDARDS

BUGS


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