OpenSolaris Launch

1 files changed, 62 insertions, 0 deletions

diff --git a/usr/src/lib/libproc/common/Pisprocdir.c b/usr/src/lib/libproc/common/Pisprocdir.c
new file mode 100644
index 0000000000..b617b2edda
--- /dev/null
+++ b/usr/src/lib/libproc/common/Pisprocdir.c
@@ -0,0 +1,62 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 1997-2003 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include <string.h>
+#include <limits.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include "Pcontrol.h"
+
+/*
+ * Return TRUE iff dir is the /proc directory.
+ */
+int
+Pisprocdir(struct ps_prochandle *Pr, const char *dir)
+{
+	char path[PATH_MAX];
+	struct stat statb;
+	struct statvfs statvfsb;
+
+	if (*dir == '/')
+		(void) snprintf(path, sizeof (path), "/proc/%d/root%s",
+		    (int)Pr->pid, dir);
+	else
+		(void) snprintf(path, sizeof (path), "/proc/%d/cwd/%s",
+		    (int)Pr->pid, dir);
+
+	/*
+	 * We can't compare the statb.st_fstype string to "proc" because
+	 * a loop-back mount of /proc would show "lofs" instead of "proc".
+	 * Instead we use the statvfs() f_basetype string.
+	 */
+	return (stat(path, &statb) == 0 &&
+	    statvfs(path, &statvfsb) == 0 &&
+	    (statb.st_mode & S_IFMT) == S_IFDIR &&
+	    statb.st_ino == 2 &&
+	    strcmp(statvfsb.f_basetype, "proc") == 0);
+}