block: try multiple NTFS filesystem implementations

NTFS filesystem is supported by multiple implementations. Try mounting
it using all known drivers. Trying just "ntfs" string was limiting
fstools to compatibility with the read-only upstream Linux driver.

This fixes:
daemon.err block: No "mount.ntfs" utility available
daemon.err block: mounting /dev/sda1 (ntfs) as /mnt/sda1 failed (25) - Not a tty

Above errors were appearing even with ntfs3 upstrea kernel driver or
ntfs-3g (user-space) installed.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

1 files changed, 29 insertions, 4 deletions

diff --git a/block.c b/block.c
index 40c52a0..4b45200 100644
--- a/block.c
+++ b/block.c
@@ -934,15 +934,34 @@ static int exec_mount(const char *source, const char *target,
 	return err;
 }
 
+static const char * const ntfs_fs[] = { "ntfs3", "ntfs-3g", "antfs", "ntfs" };
+
 static int handle_mount(const char *source, const char *target,
                         const char *fstype, struct mount *m)
 {
-	int i, err;
 	size_t mount_opts_len;
 	char *mount_opts = NULL, *ptr;
+	const char * const *filesystems;
+	int err = -EINVAL;
+	size_t count;
+	int i;
+
+	if (!strcmp(fstype, "ntfs")) {
+		filesystems = ntfs_fs;
+		count = ARRAY_SIZE(ntfs_fs);
+	} else {
+		filesystems = &fstype;
+		count = 1;
+	}
 
-	err = mount(source, target, fstype, m ? m->flags : 0,
-	            (m && m->options) ? m->options : "");
+	for (i = 0; i < count; i++) {
+		const char *fs = filesystems[i];
+
+		err = mount(source, target, fs, m ? m->flags : 0,
+			    (m && m->options) ? m->options : "");
+		if (!err || errno != ENODEV)
+			break;
+	}
 
 	/* Requested file system type is not available in kernel,
 	   attempt to call mount helper. */
@@ -979,7 +998,13 @@ static int handle_mount(const char *source, const char *target,
 		}
 
 		/* ... and now finally invoke the external mount program */
-		err = exec_mount(source, target, fstype, mount_opts);
+		for (i = 0; i < count; i++) {
+			const char *fs = filesystems[i];
+
+			err = exec_mount(source, target, fs, mount_opts);
+			if (!err)
+				break;
+		}
 	}
 
 	free(mount_opts);