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block: Keep RTMIN through RTMAX signals blocked in child #454

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block: Keep RTMIN through RTMAX signals blocked in child #454

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4 changes: 4 additions & 0 deletions block.c
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Expand Up @@ -234,12 +234,16 @@ static int block_child_sig(struct block *block)
{
sigset_t set;
int err;
unsigned int i;

/* It'd be safe to assume that all signals are unblocked by default */
err = sys_sigfillset(&set);
if (err)
return err;

for (i = 0; i <= SIGRTMAX - SIGRTMIN; i++)
sys_sigdelset(&set, SIGRTMIN + i);

return sys_sigunblock(&set);
}

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14 changes: 14 additions & 0 deletions sys.c
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Expand Up @@ -203,6 +203,20 @@ int sys_sigaddset(sigset_t *set, int sig)
return 0;
}

int sys_sigdelset(sigset_t *set, int sig)
{
int rc;

rc = sigdelset(set, sig);
if (rc == -1) {
sys_errno("sigdelset(%d (%s))", sig, strsignal(sig));
rc = -errno;
return rc;
}

return 0;
}

static int sys_sigprocmask(const sigset_t *set, int how)
{
int rc;
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1 change: 1 addition & 0 deletions sys.h
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Expand Up @@ -38,6 +38,7 @@ const char *sys_getenv(const char *name);
int sys_sigemptyset(sigset_t *set);
int sys_sigfillset(sigset_t *set);
int sys_sigaddset(sigset_t *set, int sig);
int sys_sigdelset(sigset_t *set, int sig);
int sys_sigunblock(const sigset_t *set);
int sys_sigsetmask(const sigset_t *set);
int sys_sigwaitinfo(sigset_t *set, int *sig, int *fd);
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