ptsname(3p) [posix man page]

PTSNAME(3P)						     POSIX Programmer's Manual						       PTSNAME(3P)

PROLOG

       This  manual page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may differ (consult the correspond-
       ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

NAME

       ptsname -- get name of the slave pseudo-terminal device

SYNOPSIS

       #include <stdlib.h>

       char *ptsname(int fildes);

DESCRIPTION

       The ptsname() function shall return the name of the slave pseudo-terminal device associated  with  a  master  pseudo-terminal  device.  The
       fildes argument is a file descriptor that refers to the master device. The ptsname() function shall return a pointer to a string containing
       the pathname of the corresponding slave device.

       The ptsname() function need not be thread-safe.

RETURN VALUE

       Upon successful completion, ptsname() shall return a pointer to a string which is the name of the pseudo-terminal slave device. Upon  fail-
       ure,  ptsname()	shall return a null pointer. This could occur if fildes is an invalid file descriptor or if the slave device name does not
       exist in the file system.

       The application shall not modify the string returned. The returned pointer might be invalidated or the string content might be  overwritten
       by a subsequent call to ptsname().

ERRORS

       No errors are defined.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       None.

RATIONALE

       See the RATIONALE section for posix_openpt().

FUTURE DIRECTIONS

       None.

SEE ALSO

       grantpt(), open(), posix_openpt(), ttyname(), unlockpt()

       The Base Definitions volume of POSIX.1-2008, <stdlib.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2013 Edition, Standard for Information Technol-
       ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, Copyright (C)  2013  by	the  Institute	of
       Electrical and Electronics Engineers, Inc and The Open Group.  (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the
       event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Stan-
       dard is the referee document. The original Standard can be obtained online at http://www.unix.org/online.html .

       Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source
       files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE
/The Open Group						       2013							       PTSNAME(3P)

GRANTPT(3P)						     POSIX Programmer's Manual						       GRANTPT(3P)

PROLOG

       This  manual page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may differ (consult the correspond-
       ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

NAME

       grantpt -- grant access to the slave pseudo-terminal device

SYNOPSIS

       #include <stdlib.h>

       int grantpt(int fildes);

DESCRIPTION

       The grantpt() function shall change the mode and ownership of the slave pseudo-terminal device associated with its  master  pseudo-terminal
       counterpart. The fildes argument is a file descriptor that refers to a master pseudo-terminal device. The user ID of the slave shall be set
       to the real UID of the calling process and the group ID shall be set to an unspecified group ID. The permission mode of the  slave  pseudo-
       terminal shall be set to readable and writable by the owner, and writable by the group.

       The behavior of the grantpt() function is unspecified if the application has installed a signal handler to catch SIGCHLD signals.

RETURN VALUE

       Upon successful completion, grantpt() shall return 0; otherwise, it shall return -1 and set 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.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       None.

RATIONALE

       See the RATIONALE section for posix_openpt().

FUTURE DIRECTIONS

       None.

SEE ALSO

       open(), posix_openpt(), ptsname(), unlockpt()

       The Base Definitions volume of POSIX.1-2008, <stdlib.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2013 Edition, Standard for Information Technol-
       ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, Copyright (C)  2013  by	the  Institute	of
       Electrical and Electronics Engineers, Inc and The Open Group.  (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the
       event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Stan-
       dard is the referee document. The original Standard can be obtained online at http://www.unix.org/online.html .

       Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source
       files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE
/The Open Group						       2013							       GRANTPT(3P)