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    SubjectRe: parent process behaviour to signal after vfork()
    Oops -- forgot the patch.  Here it is:

    --- a/man2/vfork.2
    +++ b/man2/vfork.2
    @@ -80,13 +80,15 @@ where a child will be created which then
    immediately issues an
    .BR vfork ()
    differs from
    .BR fork (2)
    -in that the parent is suspended until the child makes a call to
    -.BR execve (2)
    -.BR _exit (2).
    -The child shares all memory with its parent, including the stack, until
    -.BR execve (2)
    -is issued by the child.
    +in that the parent is suspended until the child terminates
    +(either normally,
    +by calling
    +.BR exit (2),
    +or abnormally, after delivery of a fatal signal),
    +or it makes a call to
    +.BR execve (2).
    +Until that point, the child shares all memory with its parent,
    +including the stack.
    The child must not return from the current function or call
    .BR exit (3),
    but may call
    @@ -95,9 +97,8 @@ but may call
    Signal handlers are inherited, but not shared.
    Signals to the parent
    arrive after the child releases the parent's memory
    -(i.e., after the child calls
    -.BR _exit (2)
    +(i.e., after the child terminates
    +or calls
    .BR execve (2)).
    .SS "Historic Description"
    Under Linux,
    @@ -135,11 +136,9 @@ The requirements put on
    by the standards are weaker than those put on
    .BR fork (2),
    so an implementation where the two are synonymous is compliant.
    -In particular, the programmer cannot
    -rely on the parent remaining blocked until a call of
    -.BR execve (2)
    -.BR _exit (2)
    +In particular, the programmer cannot rely on the parent
    +remaining blocked until the child either terminates or calls
    +.BR execve (2),
    and cannot rely on any specific behavior with respect to shared memory.
    .\" In AIXv3.1 vfork is equivalent to fork.

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