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;
+}