/* $NetBSD: file.c,v 1.5 2008/04/28 20:23:06 martin Exp $ */ /*- * Copyright (c) 2002 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Luke Mewburn. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include <sys/param.h> #include <sys/event.h> #include <sys/mount.h> #include <err.h> #include <errno.h> #include <fcntl.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <inttypes.h> int main(int argc, char **argv) { int fd, kq, n; struct kevent event[1]; char buffer[128]; int num = 999; if (argc != 2 && argc != 4) { usg: errx(1, "Usage: %s file", argv[0]); } if (argc == 4) { if (strcmp(argv[1], "-n") == 0) num = atoi(argv[2]); else goto usg; argv += 2; } fd = open(argv[1], O_RDONLY|O_CREAT, 0644); if (fd < 0) err(1, "open: %s", argv[1]); #if 1 /* XXX: why was this disabled? */ lseek(fd, 0, SEEK_END); #endif kq = kqueue(); if (kq < 0) err(1, "kqueue"); event[0].ident = fd; event[0].filter = EVFILT_READ; event[0].flags = EV_ADD | EV_ENABLE; n = kevent(kq, event, 1, NULL, 0, NULL); if (n < 0) err(1, "kevent(1)"); for (;num > 0;) { n = kevent(kq, NULL, 0, event, 1, NULL); if (n < 0) err(1, "kevent(2)"); num -= n; printf("kevent num %d flags: %#x, fflags: %#x, data: %" PRId64 "\n", n, event[0].flags, event[0].fflags, event[0].data); if (event[0].data < 0) #if 1 /* XXXLUKEM */ lseek(fd, 0, SEEK_END); #else lseek(fd, event[0].data, SEEK_END); #endif n = read(fd, buffer, 128); if (n < 0) err(1, "read"); buffer[n] = '\0'; printf("file(%d): %s", num, buffer); } printf("read: successful end\n"); exit(0); }