Home Man
Search
Today's Posts
Register

Linux & Unix Commands - Search Man Pages

CentOS 7.0 - man page for grantpt (centos section 3)

GRANTPT(3)				      Linux Programmer's Manual 				   GRANTPT(3)

NAME
grantpt - grant access to the slave pseudoterminal
SYNOPSIS
#define _XOPEN_SOURCE /* See feature_test_macros(7) */ #include <stdlib.h> int grantpt(int fd);
DESCRIPTION
The grantpt() function changes the mode and owner of the slave pseudoterminal device corresponding to the mas- ter pseudoterminal referred to by fd. The user ID of the slave is set to the real UID of the calling process. The group ID is set to an unspecified value (e.g., tty). The mode of the slave is set to 0620 (crw--w----). The behavior of grantpt() is unspecified if a signal handler is installed to catch SIGCHLD signals.
RETURN VALUE
When successful, grantpt() returns 0. Otherwise, it returns -1 and sets errno appropriately.
ERRORS
EACCES The corresponding slave pseudoterminal could not be accessed. EBADF The fd argument is not a valid open file descriptor. EINVAL The fd argument is valid but not associated with a master pseudoterminal.
VERSIONS
grantpt() is provided in glibc since version 2.1.
CONFORMING TO
POSIX.1-2001.
NOTES
This is part of the UNIX 98 pseudoterminal support, see pts(4). Many systems implement this function via a set-user-ID helper binary called "pt_chown". With Linux devpts no such helper binary is required.
SEE ALSO
open(2), posix_openpt(3), ptsname(3), unlockpt(3), pts(4), pty(7)
COLOPHON
This page is part of release 3.53 of the Linux man-pages project. A description of the project, and informa- tion about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.
GNU
2008-06-14 GRANTPT(3)


All times are GMT -4. The time now is 02:04 AM.

Unix & Linux Forums Content Copyrightę1993-2018. All Rights Reserved.
UNIX.COM Login
Username:
Password:  
Show Password