GETPTSection: Linux Programmer's Manual (3)
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NAMEgetpt - open the pseudo-terminal master (PTM)
#define _GNU_SOURCE #include <stdlib.h> int getpt(void);
DESCRIPTIONgetpt() opens a pseudo-terminal master and returns its file descriptor. It is equivalent to
open(/dev/ptmx, O_RDWR | O_NOCTTY);on Linux systems, though the pseudo-terminal master is located elsewhere on some systems that use GNU Libc.
RETURN VALUEgetpt() returns an open file descriptor upon successful completion. Otherwise, it returns -1 and sets errno to indicate the error.
ERRORSgetpt() can fail with various errors described in open(2).
VERSIONSgetpt() is provided in glibc since version 2.1.
CONFORMING TOgetpt() is glibc-specific; use posix_openpt(3) instead.
SEE ALSOgrantpt(3), posix_openpt(3), ptsname(3), unlockpt(3), ptmx(4), pty(7)
COLOPHONThis page is part of release 3.21 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.