1 files changed, 67 insertions, 0 deletions
diff --git a/tests/df/total-verify.sh b/tests/df/total-verify.sh
new file mode 100755
index 0000000..87589d2
--- /dev/null
+++ b/tests/df/total-verify.sh
@@ -0,0 +1,67 @@
+#!/bin/sh
+# Ensure "df --total" computes accurate totals
+
+# Copyright (C) 2008-2022 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 <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
+print_ver_ df
+require_perl_
+
+# Protect against inaccessible remote mounts etc.
+timeout 10 df || skip_ "df fails"
+
+cat <<\EOF > check-df || framework_failure_
+my ($total, $used, $avail) = (0, 0, 0);
+while (<>)
+  {
+    $. == 1
+      and next;  # skip first (header) line
+    # Recognize df output lines like these:
+    # /dev/sdc1                  0       0       0    -  /c
+    # tmpfs                1536000   12965 1523035    1% /tmp
+    # total                5285932  787409 4498523   15% -
+    /^(.*?) +(-?\d+|-) +(-?\d+|-) +(-?\d+|-) +(?:-|[0-9]+%) (.*)$/
+      or die "$0: invalid input line\n: $_";
+    if ($1 eq 'total' && $5 eq '-')
+      {
+        $total == $2 or die "$total != $2";
+        $used  == $3 or die "$used  != $3";
+        $avail == $4 or die "$avail != $4";
+        my $line = <>;
+        defined $line
+          and die "$0: extra line(s) after totals\n";
+        exit 0;
+      }
+    $total += $2 unless $2 eq '-';
+    $used  += $3 unless $3 eq '-';
+    $avail += $4 unless $4 eq '-';
+  }
+die "$0: missing line of totals\n";
+EOF
+
+# Use --block-size=512 to keep df from printing rounded-to-kilobyte
+# numbers which wouldn't necessarily add up to the displayed total.
+df --total -P --block-size=512 > space || framework_failure_
+cat space  # this helps when debugging any test failure
+df --total -i -P               > inode || framework_failure_
+cat inode
+
+$PERL check-df space || fail=1
+$PERL check-df inode || fail=1
+
+test "$fail" = 1 && dump_mount_list_
+
+Exit $fail