df,find_mount_point: optionally don't ignore rootfs

Signed-off-by: Lauri Kasanen <curaga@operamail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/libbb/Config.src b/libbb/Config.src
index 85892d3fe..dfb897d5f 100644
--- a/libbb/Config.src
+++ b/libbb/Config.src
@@ -161,6 +161,25 @@ config FEATURE_COPYBUF_KB
           Bigger buffers will be allocated with mmap, with fallback to 4 kb
           stack buffer if mmap fails.
 
+config FEATURE_SKIP_ROOTFS
+        bool "Skip rootfs in mount table"
+        default y
+        help
+          Ignore rootfs entry in mount table.
+
+          In Linux, kernel has a special filesystem, rootfs, which is initially
+          mounted on /. It contains initramfs data, if kernel is configured
+          to have one. Usually, another file system is mounted over / early
+          in boot process, and therefore most tools which manipulate
+          mount table, such as df, will skip rootfs entry.
+
+          However, some systems do not mount anything on /.
+          If you need to configure busybox for one of these systems,
+          you may find useful to turn this option off to make df show
+          initramfs statistic.
+
+          Otherwise, choose Y.
+
 config MONOTONIC_SYSCALL
         bool "Use clock_gettime(CLOCK_MONOTONIC) syscall"
         default n