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compat/mingw: allow sigaction(SIGCHLD) 

A future change will start using sigaction to setup a SIGCHLD signal
handler.

The current code uses signal(), which returns SIG_ERR (but doesn't
seem to set errno) so instruct sigaction() to do the same.

A new SA flag will be needed, so copy the one from Cygwin; note that
the sigaction() implementation that is provided won't use it, so
its value is otherwise irrelevant.

Signed-off-by: Carlo Marcelo Arenas Belón <carenas@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
maint
Carlo Marcelo Arenas Belón 2025-07-10 19:45:42 +00:00 committed by Junio C Hamano
parent cb3b40381e
commit ef03aa432a
2 changed files with 4 additions and 1 deletions
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1
compat/mingw-posix.h
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@ -96,6 +96,7 @@ struct sigaction {
unsigned sa_flags; unsigned sa_flags;
}; };
#define SA_RESTART 0 #define SA_RESTART 0
#define SA_NOCLDSTOP 1


struct itimerval { struct itimerval {
struct timeval it_value, it_interval; struct timeval it_value, it_interval;

4
compat/mingw.c
View File

@ -2561,7 +2561,9 @@ int setitimer(int type UNUSED, struct itimerval *in, struct itimerval *out)


int sigaction(int sig, struct sigaction *in, struct sigaction *out) int sigaction(int sig, struct sigaction *in, struct sigaction *out)
{ {
if (sig != SIGALRM) if (sig == SIGCHLD)
return -1;
else if (sig != SIGALRM)
return errno = EINVAL, return errno = EINVAL,
error("sigaction only implemented for SIGALRM"); error("sigaction only implemented for SIGALRM");
if (out) if (out)