diff options
Diffstat (limited to 'test')
| -rw-r--r-- | test/lib/aux.sh | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/test/lib/aux.sh b/test/lib/aux.sh index 3ab599f60..33710a007 100644 --- a/test/lib/aux.sh +++ b/test/lib/aux.sh @@ -952,6 +952,25 @@ clear_devs() { done } +# +# corrupt device content +# $1 file_path +# $2 string/pattern search for curruption +# $3 string/pattern replacing/corruptiong +corrupt_dev() { + local a + + # search for string on a file + # Note: returned string may possibly start with other ASCII chars + # a[0] is position in file, a[1] is the actual string + a=( $(strings -t d -n 64 "$1" | grep -m 1 "$2") ) || true + + test -n "${a[0]-}" || return 0 + + # Seek for the sequence and replace it with corruption pattern + echo -n "${a[1]/$2/$3}" | dd of="$1" bs=1 oseek="${a[0]}" conv=fdatasync +} + prepare_backing_dev() { local size=${1=32} shift |