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authorOndrej Oprala <ooprala@redhat.com>2012-12-07 21:10:40 +0100
committerBernhard Voelker <mail@bernhard-voelker.de>2012-12-07 21:13:38 +0100
commit10d35b438e731f6f0c1528d4855cdb9cf8b88349 (patch)
tree0ee0bb6047370f1a7e3c70df04a2581048cbb731 /doc
parentec48beadfa0ae1216788eaf6bf558ee2013eac18 (diff)
downloadcoreutils-10d35b438e731f6f0c1528d4855cdb9cf8b88349.tar.xz
df: do not print duplicate entries and rootfs by default
* src/df.c (struct devlist): Add new struct for storing already- examined device numbers. (devlist_head): Add new store of the above type. (show_rootfs): Add new global boolean to not skip rootfs. (dev_examined): Add new function to check if the device has already been traversed. (get_dev): Filter out rootfs unless "-t rootfs" or the -a option is specified. Filter out duplicate entries by calling the above new dev_examined unless the -a option is specified. (main): Set the show_rootfs variable appropriately when the -t option is specified for rootfs. Free device list (guarded by IF_LINT). * tests/df/skip-duplicates.sh: Add test to exercise the skipping of duplicate entries. * tests/df/skip-rootfs.sh: Add test to exercise the skipping of the rootfs pseudo file system. * tests/local.mk: Add the above new tests. * NEWS (Changes in behavior): Mention the changes. * doc/coreutils.texi (df invocation): Document df's behavior about skipping rootfs and duplicate entries. Co-authored-by: Bernhard Voelker.
Diffstat (limited to 'doc')
-rw-r--r--doc/coreutils.texi8
1 files changed, 8 insertions, 0 deletions
diff --git a/doc/coreutils.texi b/doc/coreutils.texi
index 46d36801e..21400adb6 100644
--- a/doc/coreutils.texi
+++ b/doc/coreutils.texi
@@ -10600,6 +10600,14 @@ Normally the disk space is printed in units of
1024 bytes, but this can be overridden (@pxref{Block size}).
Non-integer quantities are rounded up to the next higher unit.
+For bind mounts and without arguments, @command{df} only outputs the statistics
+for the first occurence of that device in the list of file systems (@var{mtab}),
+i.e., it hides duplicate entries, unless the @option{-a} option is specified.
+
+By default, @command{df} omits the early-boot pseudo file system type
+@samp{rootfs}, unless the @option{-a} option is specified or that file system
+type is explicitly to be included by using the @option{-t} option.
+
@cindex disk device file
@cindex device file, disk
If an argument @var{file} is a disk device file containing a mounted