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    The following form allows you to view linux man pages.

    Command:

    grantpt

    
    
    

    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 pseu-
           doterminal device corresponding to the master  pseudoterminal  referred
           to by fd.  The user ID of the slave is set to the real UID of the call-
           ing 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 pseu-
                  doterminal.
    
    
    

    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)
    
    
    

    GNU 2008-06-14 GRANTPT(3)

    
    
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