From cc8ed39b240180b58810784f844e253263594ac3 Mon Sep 17 00:00:00 2001
From: Eric Andersen <andersen@codepoet.org>
Date: Tue, 5 Oct 1999 16:24:54 +0000
Subject: Initial revision

---
 findmount.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 findmount.c

(limited to 'findmount.c')

diff --git a/findmount.c b/findmount.c
new file mode 100644
index 000000000..26e28fcd3
--- /dev/null
+++ b/findmount.c
@@ -0,0 +1,46 @@
+#include "internal.h"
+#include <stdio.h>
+#include <mntent.h>
+#include <sys/stat.h>
+
+/*
+ * Given a block device, find the mount table entry if that block device
+ * is mounted.
+ *
+ * Given any other file (or directory), find the mount table entry for its
+ * filesystem.
+ */
+extern struct mntent *
+findMountPoint(const char * name, const char * table)
+{
+	struct stat	s;
+	dev_t			mountDevice;
+	FILE *			mountTable;
+	struct mntent *	mountEntry;
+
+	if ( stat(name, &s) != 0 )
+		return 0;
+
+	if ( (s.st_mode & S_IFMT) == S_IFBLK )
+		mountDevice = s.st_rdev;
+	else
+		mountDevice = s.st_dev;
+
+	
+	if ( (mountTable = setmntent(table, "r")) == 0 )
+		return 0;
+
+	while ( (mountEntry = getmntent(mountTable)) != 0 ) {
+		if ( strcmp(name, mountEntry->mnt_dir) == 0
+		 || strcmp(name, mountEntry->mnt_fsname) == 0 )	/* String match. */
+			break;
+		if ( stat(mountEntry->mnt_fsname, &s) == 0
+		 && s.st_rdev == mountDevice )	/* Match the device. */
+				break;
+		if ( stat(mountEntry->mnt_dir, &s) == 0
+		 && s.st_dev == mountDevice )	/* Match the directory's mount point. */
+			break;
+	}
+	endmntent(mountTable);
+	return mountEntry;
+}
-- 
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