Hash :
9e78024b
Author :
Date :
2019-09-22T23:23:20
Update some URLs This is a clerical change that mostly changes http: to https: in URLs where either will work. It also updates some URLs that have moved, removes some URLs that no longer work, and fixes related text.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57
@node sigaction
@section @code{sigaction}
@findex sigaction
POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/sigaction.html}
Gnulib module: sigaction
Portability problems fixed by Gnulib:
@itemize
@item
This function is missing on some platforms:
mingw, MSVC 14.
@end itemize
Portability problems not fixed by Gnulib:
@itemize
@item
POSIX recommends that when specifying SA_RESETHAND, SA_NODEFER must
also be specified.
@item
Support for SA_ONSTACK is missing on some platforms:
mingw, MSVC 14, cygwin.
@item
Support for SA_SIGINFO is missing on some platforms:
mingw, MSVC 14.
@item
Support for SIGCHLD, and thus for SA_NOCLDSTOP and SA_NOCLDWAIT, is
missing on some platforms:
mingw, MSVC 14.
@item
Support for SA_RESETHAND is missing on some platforms:
NonStop.
@item
Support for SA_RESTART is missing on some platforms:
mingw, MSVC 14, NonStop.
@item
The symbolic value @code{SIG_IGN} for the @code{SIGCHLD} signal is equivalent
to a signal handler
@smallexample
void handle_child (int sigchld)
@{
while (waitpid (-1, NULL, WNOHANG) > 0)
;
@}
@end smallexample
except that @code{SIG_IGN} for @code{SIGCHLD} has the effect that the children
execution times are not accounted in the @code{times} function.
On some platforms (BSD? SystemV? Linux?), you need to use the @code{sigaction}
flag @code{SA_NOCLDWAIT} in order to obtain this behavior.
@end itemize