1 files changed, 133 insertions, 0 deletions
diff --git a/lib/libproc/proc_util.c b/lib/libproc/proc_util.c
new file mode 100644
index 0000000..0e7020e
--- /dev/null
+++ b/lib/libproc/proc_util.c
@@ -0,0 +1,133 @@
+/*-
+ * Copyright (c) 2008 John Birrell (jb@freebsd.org)
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+#include "_libproc.h"
+#include <errno.h>
+#include <unistd.h>
+#include <sys/ptrace.h>
+#include <sys/wait.h>
+#include <stdio.h>
+
+int
+proc_clearflags(struct proc_handle *phdl, int mask)
+{
+	if (phdl == NULL)
+		return (EINVAL);
+
+	phdl->flags &= ~mask;
+
+	return (0);
+}
+
+int
+proc_continue(struct proc_handle *phdl)
+{
+	if (phdl == NULL)
+		return (EINVAL);
+
+	if (ptrace(PT_CONTINUE, phdl->pid, (caddr_t)(uintptr_t) 1, 0) != 0)
+		return (errno);
+
+	phdl->status = PS_RUN;
+
+	return (0);
+}
+
+int
+proc_detach(struct proc_handle *phdl)
+{
+	if (phdl == NULL)
+		return (EINVAL);
+
+	if (ptrace(PT_DETACH, phdl->pid, 0, 0) != 0)
+		return (errno);
+
+	return (0);
+}
+
+int
+proc_getflags(struct proc_handle *phdl)
+{
+	if (phdl == NULL)
+		return (-1);
+
+	return(phdl->flags);
+}
+
+int
+proc_setflags(struct proc_handle *phdl, int mask)
+{
+	if (phdl == NULL)
+		return (EINVAL);
+
+	phdl->flags |= mask;
+
+	return (0);
+}
+
+int
+proc_state(struct proc_handle *phdl)
+{
+	if (phdl == NULL)
+		return (-1);
+
+	return (phdl->status);
+}
+
+int
+proc_wait(struct proc_handle *phdl)
+{
+	int status = 0;
+	struct kevent kev;
+
+	if (phdl == NULL)
+		return (EINVAL);
+
+	if (kevent(phdl->kq, NULL, 0, &kev, 1, NULL) <= 0)
+		return (0);
+
+	switch (kev.filter) {
+	/* Child has exited */
+	case EVFILT_PROC:  /* target has exited */
+		phdl->status = PS_UNDEAD;
+		break;
+	default:
+		break;
+	}
+
+	return (status);
+}
+
+pid_t
+proc_getpid(struct proc_handle *phdl)
+{
+	if (phdl == NULL)
+		return (-1);
+
+	return (phdl->pid);
+}