procctl.c revision 302408
1290931Srodrigc/* 2290931Srodrigc * Copyright 1997 Sean Eric Fagan 3290931Srodrigc * 4290931Srodrigc * Redistribution and use in source and binary forms, with or without 5290931Srodrigc * modification, are permitted provided that the following conditions 6290931Srodrigc * are met: 7290931Srodrigc * 1. Redistributions of source code must retain the above copyright 8290931Srodrigc * notice, this list of conditions and the following disclaimer. 9290931Srodrigc * 2. Redistributions in binary form must reproduce the above copyright 10290931Srodrigc * notice, this list of conditions and the following disclaimer in the 11290931Srodrigc * documentation and/or other materials provided with the distribution. 12290931Srodrigc * 3. All advertising materials mentioning features or use of this software 13290931Srodrigc * must display the following acknowledgement: 14290931Srodrigc * This product includes software developed by Sean Eric Fagan 15290931Srodrigc * 4. Neither the name of the author may be used to endorse or promote 16290931Srodrigc * products derived from this software without specific prior written 17290931Srodrigc * permission. 18290931Srodrigc * 19290931Srodrigc * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20290931Srodrigc * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21290931Srodrigc * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22290931Srodrigc * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23290931Srodrigc * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24290931Srodrigc * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25290931Srodrigc * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26290931Srodrigc * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27290931Srodrigc * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28290931Srodrigc * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29290931Srodrigc * SUCH DAMAGE. 30290931Srodrigc * 31290931Srodrigc */ 32290931Srodrigc 33290931Srodrigc#include <sys/cdefs.h> 34290931Srodrigc__FBSDID("$FreeBSD: stable/11/usr.sbin/procctl/procctl.c 114601 2003-05-03 21:06:42Z obrien $"); 35290931Srodrigc 36290931Srodrigc/* 37290931Srodrigc * procctl -- clear the event mask, and continue, any specified processes. 38290931Srodrigc * This is largely an example of how to use the procfs interface; however, 39290931Srodrigc * for now, it is also sometimes necessary, as a stopped process will not 40290931Srodrigc * otherwise continue. (This will be fixed in a later version of the 41290931Srodrigc * procfs code, almost certainly; however, this program will still be useful 42290931Srodrigc * for some annoying circumstances.) 43290931Srodrigc */ 44290931Srodrigc 45290931Srodrigc#include <err.h> 46290931Srodrigc#include <errno.h> 47290931Srodrigc#include <fcntl.h> 48290931Srodrigc#include <signal.h> 49290931Srodrigc#include <stdio.h> 50290931Srodrigc#include <stdlib.h> 51290931Srodrigc#include <string.h> 52290931Srodrigc#include <unistd.h> 53290931Srodrigc#include <sys/ioctl.h> 54290931Srodrigc#include <sys/pioctl.h> 55290931Srodrigc 56290931Srodrigcint 57290931Srodrigcmain(int ac, char **av) { 58290931Srodrigc int fd; 59290931Srodrigc int i; 60290931Srodrigc 61290931Srodrigc for (i = 1; i < ac; i++) { 62290931Srodrigc char buf[32]; 63290931Srodrigc 64290931Srodrigc snprintf(buf, sizeof(buf), "/proc/%s/mem", av[i]); 65290931Srodrigc fd = open(buf, O_RDWR); 66290931Srodrigc if (fd == -1) { 67290931Srodrigc if (errno == ENOENT) 68290931Srodrigc continue; 69290931Srodrigc warn("cannot open pid %s", av[i]); 70290931Srodrigc continue; 71290931Srodrigc } 72290931Srodrigc if (ioctl(fd, PIOCBIC, ~0) == -1) 73290931Srodrigc warn("cannot clear process %s's event mask", av[i]); 74290940Srodrigc if (ioctl(fd, PIOCCONT, 0) == -1 && errno != EINVAL) 75290931Srodrigc warn("cannot continue process %s", av[i]); 76290931Srodrigc close(fd); 77290931Srodrigc } 78290931Srodrigc return 0; 79290931Srodrigc} 80290931Srodrigc