grantpt(3C)

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | USAGE | ATTRIBUTES | SUMMARY OF TRUSTED SOLARIS CHANGES | SEE ALSO

NAME

grantpt- grant access to the slave pseudo-terminal device

SYNOPSIS

#include <stdlib.h>

int grantpt(int fildes);

DESCRIPTION

The grantpt() function changes the mode and ownership of the slave pseudo-terminal device associated with its master pseudo-terminal counter part. fildes is the file descriptor returned from a successful open of the master pseudo-terminal device. A setuid root program (see setuid(2)) is invoked to change the permissions. The user ID of the slave is set to the real UID of the calling process and the group ID is set to a reserved group. The permission mode of the slave pseudo-terminal is set to readable and writable by the owner and writable by the group.

In the Trusted Solaris environment, the grantpt() function has been modified to do nothing and always return successfully. Automatic device allocation obsoletes this function since device ownership and permissions are automatically assigned to the open() process.

RETURN VALUES

Upon successful completion, grantpt() returns 0. Otherwise, it returns -1 and sets errno to indicate the error.

ERRORS

The grantpt() function may fail if:

EBADF

The fildes argument is not a valid open file descriptor.

EINVAL

The fildes argument is not associated with a master pseudo-terminal device.

EACCES

The corresponding slave pseudo-terminal device could not be accessed.

USAGE

The grantpt() function will fail if it is unable to successfully invoke the setuid root program. It may also fail if the application has installed a signal handler to catch SIGCHLD signals.

ATTRIBUTES

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE	ATTRIBUTE VALUE
MT-Level	Safe

SUMMARY OF TRUSTED SOLARIS CHANGES

Automatic device allocation obsoletes the grantpt() function.

SEE ALSO

Trusted Solaris 8 4/01 Reference Manual

open(2), setuid(2)

SunOS 5.8 Reference Manual

ptsname(3C), unlockpt(3C), attributes(5)

STREAMS Programming Guide

SunOS 5.8  Last Revised 22 Sep 2000

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | USAGE | ATTRIBUTES | SUMMARY OF TRUSTED SOLARIS CHANGES | SEE ALSO