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[patch][doc] Fix EXAMPLE in kqueue(2)

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The error control was not properly implemented. "changelist" is const, hence
event.flags is never changed by the syscall.

PR:	196844
Reported by:	eugen@
Reviewed by:	PauAmma <pauamma@gundo.com>
Approved by:	eugen@
Fixes:	8c231786f0
This commit is contained in:
Fernando Apesteguía 2022-04-11 20:40:28 +02:00
parent f8058d3333
commit e07b0c12ba
1 changed files with 7 additions and 5 deletions
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12
lib/libc/sys/kqueue.2
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@ -24,7 +24,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd January 20, 2022
.Dd April 13, 2022
.Dt KQUEUE 2
.Os
.Sh NAME
@ -742,8 +742,6 @@ main(int argc, char **argv)
ret = kevent(kq, &event, 1, NULL, 0, NULL);
if (ret == -1)
err(EXIT_FAILURE, "kevent register");
if (event.flags & EV_ERROR)
errx(EXIT_FAILURE, "Event error: %s", strerror(event.data));
for (;;) {
/* Sleep until something happens. */
@ -751,8 +749,12 @@ main(int argc, char **argv)
if (ret == -1) {
err(EXIT_FAILURE, "kevent wait");
} else if (ret > 0) {
printf("Something was written in '%s'\en", argv[1]);
}
if (tevent.flags & EV_ERROR)
errx(EXIT_FAILURE, "Event error: %s", strerror(event.data));
else
printf("Something was written in '%s'\en", argv[1]);
}
}
}
.Ed