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annotate doc/posix-functions/sigaction.texi @ 9960:9f9682a4b630

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Replace the isw* functions on Linux libc5.
author Bruno Haible <bruno@clisp.org>
date Tue, 22 Apr 2008 01:56:52 +0200
parents 070329237839
children 29502a2dd08a
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070329237839 Rename two directories: headers -> posix-headers, functions -> posix-functions.
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1 @node sigaction
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2 @section @code{sigaction}
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3 @findex sigaction
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4
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5 POSIX specification: @url{http://www.opengroup.org/susv3xsh/sigaction.html}
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6
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7 Gnulib module: ---
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8
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9 Portability problems fixed by Gnulib:
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10 @itemize
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11 @end itemize
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12
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13 Portability problems not fixed by Gnulib:
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14 @itemize
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15 @item
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16 This function is missing on some platforms:
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17 mingw.
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18 @item
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19 The symbolic value @code{SIG_IGN} for the @code{SIGCHLD} signal is equivalent
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20 to a signal handler
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21 @smallexample
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22 void handle_child (int sigchld)
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23 @{
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24 while (waitpid (-1, NULL, WNOHANG) > 0)
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25 ;
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26 @}
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27 @end smallexample
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28 except that @code{SIG_IGN} for @code{SIGCHLD} has the effect that the children
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29 execution times are not accounted in the @code{times} function.
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30 On some platforms (BSD? SystemV? Linux?), you need to use the @code{sigaction}
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31 flag @code{SA_NOCLDWAIT} in order to obtain this behavior.
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32 @end itemize