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unlockpt(3c)

Standard C Library Functions                                      unlockpt(3C)



NAME
       unlockpt - unlock a pseudo-terminal master/slave pair

SYNOPSIS
       #include <stdlib.h>

       int unlockpt(int fildes);

DESCRIPTION
       The  unlockpt() function unlocks the slave pseudo-terminal device asso‐
       ciated with the master to which fildes refers.


       Portable applications must call unlockpt()  before  opening  the  slave
       side of a pseudo-terminal device.

RETURN VALUES
       Upon successful completion, unlockpt() returns 0. Otherwise, it returns
       −1 and sets errno to indicate the error.

ERRORS
       The unlockpt() function may fail if:

       EBADF     The fildes argument is not a file descriptor open  for  writ‐
                 ing.


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


ATTRIBUTES
       See attributes(7) for descriptions of the following attributes:


       tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE  TYPEAT‐
       TRIBUTE VALUE _ Interface StabilityCommitted _ MT-LevelSafe _ Standard‐
       See standards(7).


SEE ALSO
       open(2), grantpt(3C), ptsname(3C), attributes(7), standards(7)


       STREAMS Programming Guide



Oracle Solaris 11.4               14 Aug 2002                     unlockpt(3C)
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