D58386.1794814197.diff
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	diff --git a/bin/pwait/pwait.c b/bin/pwait/pwait.c
	--- a/bin/pwait/pwait.c
	+++ b/bin/pwait/pwait.c
	@@ -66,6 +66,15 @@
	static struct pidtree pids = RB_INITIALIZER(&pids);
	RB_GENERATE_STATIC(pidtree, pid, entry, pidcmp);

	+static volatile sig_atomic_t siginfo;
	+
	+static void
	+handler(int signo)
	+{
	+ if (signo == SIGINFO)
	+ siginfo = 1;
	+}
	+
	static void
	usage(void)
	{
	@@ -221,9 +230,21 @@
	}
	}
	ret = EX_OK;
	+ signal(SIGINFO, handler);
	+ setvbuf(stderr, NULL, _IOLBF, 0);
	while ((ndone == 0 \|\| !oflag) && ret == EX_OK && nleft > 0) {
	n = kevent(kq, NULL, 0, e, nleft + tflag, NULL);
	+ if (siginfo) {
	+ p = RB_MIN(pidtree, &pids);
	+ fprintf(stderr, "%d", p->pid);
	+ while ((p = RB_NEXT(pidtree, &pids, p)) != NULL)
	+ fprintf(stderr, " %d", p->pid);
	+ fprintf(stderr, "\n");
	+ siginfo = 0;
	+ }
	if (n == -1) {
	+ if (errno == EINTR)
	+ continue;
	err(EX_OSERR, "kevent");
	}
	for (i = 0; i < n; i++) {