zfs boot: add lszfs command to i386 loader

... to list child datasets of a specified dataset.
Dataset name should be provided in poolname/dsname format.

MFC after:	17 days

1 files changed, 23 insertions, 0 deletions

diff --git a/sys/boot/i386/loader/main.c b/sys/boot/i386/loader/main.c
index 91f4e32..73474cf 100644
--- a/sys/boot/i386/loader/main.c
+++ b/sys/boot/i386/loader/main.c
@@ -322,6 +322,29 @@ command_heap(int argc, char *argv[])
     return(CMD_OK);
 }
 
+#ifdef LOADER_ZFS_SUPPORT
+COMMAND_SET(lszfs, "lszfs", "list child datasets of a zfs dataset",
+    command_lszfs);
+
+static int
+command_lszfs(int argc, char *argv[])
+{
+    int err;
+
+    if (argc != 2) {
+	command_errmsg = "wrong number of arguments";
+	return (CMD_ERROR);
+    }
+
+    err = zfs_list(argv[1]);
+    if (err != 0) {
+	command_errmsg = strerror(err);
+	return (CMD_ERROR);
+    }
+    return (CMD_OK);
+}
+#endif
+
 /* ISA bus access functions for PnP. */
 static int
 isa_inb(int port)