Implement _is_char_dev similar to _is_block_dev to test for
character devices.
Add a _require_local_device test. This test is similar to
_require_block_device but checks if the path refers to a
block or a character device.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@xxxxxxxxxxxxx>
---
common/rc | 37 +++++++++++++++++++++++++++++++++++++
1 file changed, 37 insertions(+)
diff --git a/common/rc b/common/rc
index ba215961..ae8ea550 100644
--- a/common/rc
+++ b/common/rc
@@ -1363,6 +1363,26 @@ _is_block_dev()
fi
}
+# returns device number if a file is a character device
+#
+_is_char_dev()
+{
+ if [ $# -ne 1 ]
+ then
+ echo "Usage: _is_char_dev dev" 1>&2
+ exit 1
+ fi
+
+ _dev=$1
+ if [ -L "${_dev}" ]; then
+ _dev=`readlink -f "${_dev}"`
+ fi
+
+ if [ -c "${_dev}" ]; then
+ src/lstat64 "${_dev}" | $AWK_PROG '/Device type:/ { print $9 }'
+ fi
+}
+
# Do a command, log it to $seqres.full, optionally test return status
# and die if command fails. If called with one argument _do executes the
# command, logs it, and returns its exit status. With two arguments _do
@@ -1791,6 +1811,23 @@ _require_block_device()
fi
}
+# this test requires a path to refere to a local block or character device
+# $1 - device
+_require_local_device()
+{
+ if [ -z "$1" ]; then
+ echo "Usage: _require_local_device <dev>" 1>&2
+ exit 1
+ fi
+ if [ "`_is_block_dev "$1"`" != "" ]; then
+ return 0
+ fi
+ if [ "`_is_char_dev "$1"`" != "" ]; then
+ return 0
+ fi
+ _notrun "require $1 to be local device"
+}
+
# brd based ram disks erase the device when they receive a flush command when no
# active references are present. This causes problems for DM devices sitting on
# top of brd devices as DM doesn't hold active references to the brd device.
--
2.12.0
--
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