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coreutils/coreutils-df-direct.patch

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diff --git a/doc/coreutils.texi b/doc/coreutils.texi
index fa21f03..7b8b622 100644
--- a/doc/coreutils.texi
+++ b/doc/coreutils.texi
@@ -10104,6 +10104,13 @@ pseudo-file-systems, such as automounter entries.
Scale sizes by @var{size} before printing them (@pxref{Block size}).
For example, @option{-BG} prints sizes in units of 1,073,741,824 bytes.
+@itemx --direct
+@opindex --direct
+@cindex direct statfs for a file
+Do not resolve mount point and show statistics directly for a file. It can be
+especially useful for NFS mount points if there is a boundary between two
+storage policies behind the mount point.
+
@itemx --total
@opindex --total
@cindex grand total of disk size, usage and available space
diff --git a/src/df.c b/src/df.c
index b862879..a74c353 100644
--- a/src/df.c
+++ b/src/df.c
@@ -110,6 +110,9 @@ static bool print_type;
/* If true, print a grand total at the end. */
static bool print_grand_total;
+/* If true, show statistics for a file instead of mount point. */
+static bool direct_statfs;
+
/* Grand total data. */
static struct fs_usage grand_fsu;
@@ -118,13 +121,15 @@ static struct fs_usage grand_fsu;
enum
{
NO_SYNC_OPTION = CHAR_MAX + 1,
- SYNC_OPTION
+ SYNC_OPTION,
+ DIRECT_OPTION
};
static struct option const long_options[] =
{
{"all", no_argument, NULL, 'a'},
{"block-size", required_argument, NULL, 'B'},
+ {"direct", no_argument, NULL, DIRECT_OPTION},
{"inodes", no_argument, NULL, 'i'},
{"human-readable", no_argument, NULL, 'h'},
{"si", no_argument, NULL, 'H'},
@@ -205,7 +210,10 @@ print_header (void)
human_readable (output_block_size, buf, opts, 1, 1));
}
- fputs (_(" Mounted on\n"), stdout);
+ if (direct_statfs)
+ fputs (_(" File\n"), stdout);
+ else
+ fputs (_(" Mounted on\n"), stdout);
}
/* Is FSTYPE a type of file system that should be listed? */
@@ -754,6 +762,17 @@ show_point (const char *point, const struct stat *statp)
static void
show_entry (char const *name, struct stat const *statp)
{
+ if (direct_statfs)
+ {
+ char *resolved = canonicalize_file_name (name);
+ if (resolved)
+ {
+ show_dev (NULL, resolved, NULL, NULL, false, false, NULL);
+ free (resolved);
+ return;
+ }
+ }
+
if ((S_ISBLK (statp->st_mode) || S_ISCHR (statp->st_mode))
&& show_disk (name))
return;
@@ -820,6 +839,7 @@ Mandatory arguments to long options are mandatory for short options too.\n\
-B, --block-size=SIZE scale sizes by SIZE before printing them. E.g.,\n\
`-BM' prints sizes in units of 1,048,576 bytes.\n\
See SIZE format below.\n\
+ --direct show statistics for a file instead of mount point\n\
--total produce a grand total\n\
-h, --human-readable print sizes in human readable format (e.g., 1K 234M 2G)\n\
-H, --si likewise, but use powers of 1000 not 1024\n\
@@ -894,6 +914,9 @@ main (int argc, char **argv)
xstrtol_fatal (e, oi, c, long_options, optarg);
}
break;
+ case DIRECT_OPTION:
+ direct_statfs = true;
+ break;
case 'i':
inode_format = true;
break;
@@ -954,6 +977,13 @@ main (int argc, char **argv)
}
}
+ if (direct_statfs && show_local_fs)
+ {
+ error (0, 0, _("options --direct and --local (-l) are mutually "
+ "exclusive"));
+ usage (EXIT_FAILURE);
+ }
+
if (human_output_opts == -1)
{
if (posix_format)
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 1cb5a76..ab7abb4 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -328,6 +328,7 @@ TESTS = \
dd/stderr \
dd/unblock \
dd/unblock-sync \
+ df/direct \
df/total-verify \
du/2g \
du/8gb \
diff --git a/tests/df/direct b/tests/df/direct
new file mode 100644
index 0000000..9088f27
--- /dev/null
+++ b/tests/df/direct
@@ -0,0 +1,55 @@
+#!/bin/sh
+# Ensure "df --direct" works as documented
+
+# Copyright (C) 2010 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+print_ver_ df
+
+df || skip_test_ "df fails"
+
+DIR=`pwd` || framework_failure
+FILE="$DIR/file"
+touch "$FILE" || framework_failure
+echo "$FILE" > file_exp || framework_failure
+echo "Mounted on" > header_mounted_exp || framework_failure
+echo "File" > header_file_exp || framework_failure
+
+fail=0
+
+df --portability "$FILE" > df_out || fail=1
+df --portability --direct "$FILE" > df_direct_out || fail=1
+df --portability --direct --local "$FILE" > /dev/null 2>&1 && fail=1
+
+# check df header
+$AWK '{ if (NR==1) print $6 " " $7; }' df_out > header_mounted_out \
+ || framework_failure
+$AWK '{ if (NR==1) print $6; }' df_direct_out > header_file_out \
+ || framework_failure
+compare header_mounted_out header_mounted_exp || fail=1
+compare header_file_out header_file_exp || fail=1
+
+# check df output (without --direct)
+$AWK '{ if (NR==2) print $6; }' df_out > file_out \
+ || framework_failure
+compare file_out file_exp && fail=1
+
+# check df output (with --direct)
+$AWK '{ if (NR==2) print $6; }' df_direct_out > file_out \
+ || framework_failure
+compare file_out file_exp || fail=1
+
+Exit $fail
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