Pseudofsize procfs(5).

1 files changed, 132 insertions, 0 deletions

diff --git a/sys/fs/procfs/procfs_ioctl.c b/sys/fs/procfs/procfs_ioctl.c
new file mode 100644
index 0000000..b5cec14
--- /dev/null
+++ b/sys/fs/procfs/procfs_ioctl.c
@@ -0,0 +1,132 @@
+/*-
+ * Copyright (c) 2001 Dag-Erling Coïdan Smørgrav
+ * 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
+ *    in this position and unchanged.
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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 <sys/param.h>
+#include <sys/lock.h>
+#include <sys/mutex.h>
+#include <sys/pioctl.h>
+#include <sys/proc.h>
+#include <sys/signalvar.h>
+#include <sys/systm.h>
+
+#include <fs/pseudofs/pseudofs.h>
+#include <fs/procfs/procfs.h>
+
+#ifdef PROCFS_DEBUG
+/*
+ * Process ioctls
+ */
+int
+procfs_ioctl(PFS_IOCTL_ARGS)
+{
+	struct procfs_status *ps;
+	int error, sig;
+
+	PROC_LOCK(p);
+	error = 0;
+	switch (cmd) {
+	case PIOCBIS:
+		p->p_stops |= *(unsigned int *)data;
+		break;
+	case PIOCBIC:
+		p->p_stops &= ~*(unsigned int *)data;
+		break;
+	case PIOCSFL:
+		/* ignore */
+		break;
+	case PIOCGFL:
+		*(unsigned int *)data = 0; /* nope */
+		break;
+	case PIOCWAIT:
+		while (p->p_step == 0) {
+			/* sleep until p stops */
+			error = msleep(&p->p_stype, &p->p_mtx,
+			    PWAIT|PCATCH, "pioctl", 0);
+			if (error != 0)
+				break;
+		}
+		/* fall through to PIOCSTATUS */
+	case PIOCSTATUS:
+		ps = (struct procfs_status *)data;
+		ps->state = (p->p_step == 0);
+		ps->flags = 0; /* nope */
+		ps->events = p->p_stops;
+		ps->why = p->p_step ? p->p_stype : 0;
+		ps->val = p->p_step ? p->p_xstat : 0;
+		break;
+	case PIOCCONT:
+		if (p->p_step)
+			break;
+		sig = *(int *)data;
+		if (!_SIG_VALID(sig)) {
+			error = EINVAL;
+			break;
+		}
+#if 0
+		mtx_lock_spin(&sched_lock);
+		p->p_step = 0;
+		if (p->p_stat == SSTOP) {
+			p->p_xstat = sig;
+			setrunnable(&p->p_thread);
+			mtx_unlock_spin(&sched_lock);
+		} else {
+			mtx_unlock_spin(&sched_lock);
+			if (sig)
+				psignal(p, sig);
+		}
+#else
+		if (sig)
+			psignal(p, sig);
+		wakeup(&p->p_step);
+#endif
+		break;
+	default:
+		error = (ENOTTY);
+	}
+	PROC_UNLOCK(p);
+	
+	return (error);
+}
+
+/*
+ * Clean up on last close
+ */
+int
+procfs_close(PFS_CLOSE_ARGS)
+{
+	if (p != NULL && (p->p_pfsflags & PF_LINGER) == 0) {
+		p->p_pfsflags = 0;
+		p->p_stops = 0;
+		p->p_step = 0;
+		wakeup(&p->p_step);
+	}
+	return (0);
+}
+#endif