2 * Copyright 1997 Sean Eric Fagan
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * 3. All advertising materials mentioning features or use of this software
13 * must display the following acknowledgement:
14 * This product includes software developed by Sean Eric Fagan
15 * 4. Neither the name of the author may be used to endorse or promote
16 * products derived from this software without specific prior written
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
37 * procctl -- clear the event mask, and continue, any specified processes.
38 * This is largely an example of how to use the procfs interface; however,
39 * for now, it is also sometimes necessary, as a stopped process will not
40 * otherwise continue. (This will be fixed in a later version of the
41 * procfs code, almost certainly; however, this program will still be useful
42 * for some annoying circumstances.)
53 #include <sys/ioctl.h>
54 #include <sys/pioctl.h>
57 main(int ac, char **av) {
61 for (i = 1; i < ac; i++) {
64 snprintf(buf, sizeof(buf), "/proc/%s/mem", av[i]);
65 fd = open(buf, O_RDWR);
69 warn("cannot open pid %s", av[i]);
72 if (ioctl(fd, PIOCBIC, ~0) == -1)
73 warn("cannot clear process %s's event mask", av[i]);
74 if (ioctl(fd, PIOCCONT, 0) == -1 && errno != EINVAL)
75 warn("cannot continue process %s", av[i]);