ctermid man page on NetBSD

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CTERMID(3)		 BSD Library Functions Manual		    CTERMID(3)

NAME
     ctermid — generate terminal pathname

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <stdio.h>

     char *
     ctermid(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.  Oth‐
     erwise, the pathname is copied into the memory referenced by buf.	The
     argument buf is assumed to point to an array at least L_ctermid bytes
     long (as defined in the include file <stdio.h>).

     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
     The ctermid() function conforms to ISO/IEC 9945-1:1990 (“POSIX.1”).

BUGS
     By default the ctermid() function writes all information to an internal
     static object.  Subsequent calls to ctermid() will modify the same
     object.

BSD				 June 4, 1993				   BSD
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