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82 lines
2.8 KiB
C
82 lines
2.8 KiB
C
/*
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* Copyright 1997 Sean Eric Fagan
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Sean Eric Fagan
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* 4. Neither the name of the author may be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#ifndef lint
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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/*
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* procctl -- clear the event mask, and continue, any specified processes.
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* This is largely an example of how to use the procfs interface; however,
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* for now, it is also sometimes necessary, as a stopped process will not
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* otherwise continue. (This will be fixed in a later version of the
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* procfs code, almost certainly; however, this program will still be useful
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* for some annoying circumstances.)
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*/
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/ioctl.h>
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#include <sys/pioctl.h>
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int
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main(int ac, char **av) {
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int fd;
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int i;
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for (i = 1; i < ac; i++) {
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char buf[32];
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snprintf(buf, sizeof(buf), "/proc/%s/mem", av[i]);
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fd = open(buf, O_RDWR);
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if (fd == -1) {
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if (errno == ENOENT)
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continue;
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warn("cannot open pid %s", av[i]);
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continue;
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}
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if (ioctl(fd, PIOCBIC, ~0) == -1)
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warn("cannot clear process %s's event mask", av[i]);
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if (ioctl(fd, PIOCCONT, 0) == -1 && errno != EINVAL)
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warn("cannot continue process %s", av[i]);
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close(fd);
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}
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return 0;
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}
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