diff options
Diffstat (limited to 'usr.sbin/procctl/procctl.c')
-rw-r--r-- | usr.sbin/procctl/procctl.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/usr.sbin/procctl/procctl.c b/usr.sbin/procctl/procctl.c new file mode 100644 index 0000000..5bd1f21 --- /dev/null +++ b/usr.sbin/procctl/procctl.c @@ -0,0 +1,79 @@ +/* + * Copyright 1997 Sean Eric Fagan + * + * 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. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Sean Eric Fagan + * 4. Neither the name of the author may be used to endorse or promote + * products derived from this software without specific prior written + * permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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/cdefs.h> +__FBSDID("$FreeBSD$"); + +/* + * procctl -- clear the event mask, and continue, any specified processes. + * This is largely an example of how to use the procfs interface; however, + * for now, it is also sometimes necessary, as a stopped process will not + * otherwise continue. (This will be fixed in a later version of the + * procfs code, almost certainly; however, this program will still be useful + * for some annoying circumstances.) + */ + +#include <err.h> +#include <errno.h> +#include <fcntl.h> +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <sys/ioctl.h> +#include <sys/pioctl.h> + +int +main(int ac, char **av) { + int fd; + int i; + + for (i = 1; i < ac; i++) { + char buf[32]; + + snprintf(buf, sizeof(buf), "/proc/%s/mem", av[i]); + fd = open(buf, O_RDWR); + if (fd == -1) { + if (errno == ENOENT) + continue; + warn("cannot open pid %s", av[i]); + continue; + } + if (ioctl(fd, PIOCBIC, ~0) == -1) + warn("cannot clear process %s's event mask", av[i]); + if (ioctl(fd, PIOCCONT, 0) == -1 && errno != EINVAL) + warn("cannot continue process %s", av[i]); + close(fd); + } + return 0; +} |