ucontext man page on DigitalUNIX

ucontext man page on DigitalUNIX

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ucontext(5)							   ucontext(5)

NAME
       ucontext - user context

SYNOPSIS
       #include <ucontext.h>

DESCRIPTION
       The  thread  of control within an executing process is specified by the
       ucontext structure.  This structure contains  at	 least	the  following
       members:

       ucontext_t  uc_link
	      sigset_t	  uc_sigmask
	      stack_t	  uc_stack
	      mcontext_t  uc_mcontext

       The values for each member is as follows: Points to the context that is
       to continue when this context returns. If uc_link is equal to zero (0),
       this  is	 the  main  context,  and  the process exits when this context
       returns.	 Specifies the set of signals that are blocked when this  con‐
       text  is	 active.   See sigprocmask(2) for more information.  Specifies
       the stack used by this context.	See sigaltstack(2) for	more  informa‐
       tion.  Contains the saved machine registers and any implementation-spe‐
       cific context data.

RESTRICTIONS
       Portable applications should not access or modify the uc_mcontext value
       in the ucontext structure.

SEE ALSO
       Functions: getcontext(2), sigaction(2), sigprocmask(2), sigaltstack(2).

								   ucontext(5)

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