First checkin of the procctl program.
This commit is contained in:
Sean Eric Fagan
parent
2a024a2b05
commit
c430992a81
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=31565
5
bin/procctl/Makefile
Normal file
5
bin/procctl/Makefile
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PROG= procctl
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LDFLAGS += -static
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.include <bsd.prog.mk>
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29
bin/procctl/procctl.1
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29
bin/procctl/procctl.1
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.Dd Nov 23, 1997
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.Dt PROCCTL 1
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.Os FreeBSD
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.Sh NAME
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.Nm \&procctl
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.Nd clear procfs event flags
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.Sh Synopsis
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.Nm \&procctl
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.Ar command
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.Ar [...]
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.Sh DESCRIPTION
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.Nm \&procctl
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clears the
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.Xr procfs 5
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event mask used by
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.Xr truss 1 .
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This can be used in the event that a process is left stranded, since
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the
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.Xr procfs 5
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events result in a non-killable process.
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The options are a list of process ID's;
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.Nm \&procctl
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goes through the list and clears the event masks for each specified process.
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.Xr truss 1 ,
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.Xr procfs 5
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.Sh HISTORY
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The
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.Nm procctl
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command was written by Sean Eric Fagan for FreeBSD.
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55
bin/procctl/procctl.c
Normal file
55
bin/procctl/procctl.c
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@ -0,0 +1,55 @@
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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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/*
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* $Id$
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*/
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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 <errno.h>
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#include <err.h>
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#include <signal.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <sys/pioctl.h>
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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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unsigned int mask;
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char **command;
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struct procfs_status pfs;
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for (i = 1; i < ac; i++) {
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char buf[32];
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sprintf(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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fprintf(stderr, "%s: cannot open pid %s: %s\n",
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av[0], av[i], strerror(errno));
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continue;
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}
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mask = ~0;
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if (ioctl(fd, PIOCBIC, &mask) == -1) {
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fprintf(stderr, "%s: cannot clear process %s's event mask: %s\n",
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av[0], av[i], strerror(errno));
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}
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mask = 0;
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if (ioctl(fd, PIOCCONT, &mask) == -1 && errno != EINVAL) {
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fprintf(stderr, "%s: cannot continue process %s: %s\n",
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av[0], av[i], strerror(errno));
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}
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close(fd);
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}
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return 0;
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}
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5
usr.sbin/procctl/Makefile
Normal file
5
usr.sbin/procctl/Makefile
Normal file
@ -0,0 +1,5 @@
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PROG= procctl
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LDFLAGS += -static
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.include <bsd.prog.mk>
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29
usr.sbin/procctl/procctl.8
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29
usr.sbin/procctl/procctl.8
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@ -0,0 +1,29 @@
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.Dd Nov 23, 1997
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.Dt PROCCTL 1
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.Os FreeBSD
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.Sh NAME
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.Nm \&procctl
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.Nd clear procfs event flags
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.Sh Synopsis
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.Nm \&procctl
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.Ar command
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.Ar [...]
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.Sh DESCRIPTION
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.Nm \&procctl
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clears the
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.Xr procfs 5
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event mask used by
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.Xr truss 1 .
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This can be used in the event that a process is left stranded, since
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the
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.Xr procfs 5
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events result in a non-killable process.
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The options are a list of process ID's;
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.Nm \&procctl
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goes through the list and clears the event masks for each specified process.
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.Xr truss 1 ,
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.Xr procfs 5
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.Sh HISTORY
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The
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.Nm procctl
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command was written by Sean Eric Fagan for FreeBSD.
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55
usr.sbin/procctl/procctl.c
Normal file
55
usr.sbin/procctl/procctl.c
Normal file
@ -0,0 +1,55 @@
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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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/*
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* $Id$
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*/
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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 <errno.h>
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#include <err.h>
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#include <signal.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <sys/pioctl.h>
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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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unsigned int mask;
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char **command;
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struct procfs_status pfs;
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for (i = 1; i < ac; i++) {
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char buf[32];
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sprintf(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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fprintf(stderr, "%s: cannot open pid %s: %s\n",
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av[0], av[i], strerror(errno));
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continue;
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}
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mask = ~0;
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if (ioctl(fd, PIOCBIC, &mask) == -1) {
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fprintf(stderr, "%s: cannot clear process %s's event mask: %s\n",
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av[0], av[i], strerror(errno));
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}
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mask = 0;
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if (ioctl(fd, PIOCCONT, &mask) == -1 && errno != EINVAL) {
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fprintf(stderr, "%s: cannot continue process %s: %s\n",
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av[0], av[i], strerror(errno));
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}
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close(fd);
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}
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return 0;
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}
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