mirror of https://github.com/mkerrisk/man-pages
sigaction.2: Add a little info about ucontext_t
Reported-by: Tolga Dalman <tolga.dalman@googlemail.com> Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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.\" 2010-06-11 Andi Kleen, add hwpoison signal extensions
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.\" 2010-06-11 mtk, improvements to discussion of various siginfo_t fields.
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.\"
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.TH SIGACTION 2 2010-06-16 "Linux" "Linux Programmer's Manual"
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.TH SIGACTION 2 2011-09-08 "Linux" "Linux Programmer's Manual"
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.SH NAME
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sigaction \- examine and change a signal action
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.SH SYNOPSIS
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@ -142,6 +142,11 @@ pointer to a
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as its second argument and a pointer to a
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.I ucontext_t
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(cast to \fIvoid\ *\fP) as its third argument.
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(Commonly, the handler function doesn't make any use of the third argument.
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See
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.BR getcontext (2)
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for further information about
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.IR ucontext_t .)
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.PP
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.I sa_mask
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specifies a mask of signals which should be blocked
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