PERFORCE change 85425 for review

[Robert Watson]

http://perforce.freebsd.org/chv.cgi?CH=85425

Change 85425 by rwatson at rwatson_zoo on 2005/10/17 11:35:46

	Return EBUSY instead of EOPNOTSUPP if a second reader tries to
	open /dev/audit at the same time as an existing one.  This is
	more  consistent with other device nodes.
	
	Minor style tweaks.

Affected files ...

.. //depot/projects/trustedbsd/audit3/sys/security/audit/audit_trigger.c#5 edit

Differences ...

==== //depot/projects/trustedbsd/audit3/sys/security/audit/audit_trigger.c#5 (text+ko) ====

@@ -61,12 +61,8 @@
 	if (!audit_isopen) {
 		error = 0;
 		audit_isopen = 1;
-	} else {
-		/*
-		 * XXXRW: Why not EBUSY?
-		 */
-		error = EOPNOTSUPP;
-	}
+	} else
+		error = EBUSY;
 	mtx_unlock(&audit_trigger_mtx);
 
 	return (error);
@@ -77,7 +73,7 @@
 {
 	struct trigger_info *ti;
 
-	/* Drain the queue of pending trigger events */
+	/* Flush the queue of pending trigger events. */
 	mtx_lock(&audit_trigger_mtx);
 	audit_isopen = 0;
 	while (!TAILQ_EMPTY(&trigger_list)) {
@@ -86,6 +82,7 @@
 		free(ti, M_AUDIT);
 	}
 	mtx_unlock(&audit_trigger_mtx);
+
 	return (0);
 }
 
@@ -97,8 +94,8 @@
 
 	mtx_lock(&audit_trigger_mtx);
 	while (TAILQ_EMPTY(&trigger_list)) {
-		error = msleep(&trigger_list, &audit_trigger_mtx, PSOCK | PCATCH,
-			"auditd", 0);
+		error = msleep(&trigger_list, &audit_trigger_mtx,
+		    PSOCK | PCATCH, "auditd", 0);
 		if (error)
 			break;
 	}
@@ -111,15 +108,15 @@
 		error = uiomove(ti, sizeof *ti, uio);
 		free(ti, M_AUDIT);
 	}
-	return error;
+	return (error);
 }
 
 static int
 audit_write(struct cdev *dev, struct uio *uio, int ioflag)
 {
 
-	/* Communication is kernel->userspace only */
-	return EOPNOTSUPP;
+	/* Communication is kernel->userspace only. */
+	return (EOPNOTSUPP);
 }
 
 void
@@ -127,7 +124,7 @@
 {
 	struct trigger_info *ti;
 
-	/* If nobody's listening, we ain't talking */
+	/* If nobody's listening, we ain't talking. */
 	if (!audit_isopen)
 		return;
 
@@ -140,7 +137,6 @@
 	TAILQ_INSERT_TAIL(&trigger_list, ti, list);
 	wakeup(&trigger_list);
 	mtx_unlock(&audit_trigger_mtx);
-	return;
 }
 
 static struct cdevsw audit_cdevsw = {
@@ -164,7 +160,7 @@
 audit_trigger_cdev_init(void *unused)
 {
 
-	/* Create the special device file */
+	/* Create the special device file. */
 	audit_dev = make_dev(&audit_cdevsw, 0, UID_ROOT, GID_KMEM, 0600,
 	    AUDITDEV_FILENAME);
 }
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