diff options
Diffstat (limited to 'package/base-files/files/lib/functions/caldata.sh')
| -rw-r--r-- | package/base-files/files/lib/functions/caldata.sh | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/package/base-files/files/lib/functions/caldata.sh b/package/base-files/files/lib/functions/caldata.sh index 6862da7164..e22c7d27e6 100644 --- a/package/base-files/files/lib/functions/caldata.sh +++ b/package/base-files/files/lib/functions/caldata.sh @@ -64,7 +64,8 @@ caldata_from_file() { [ -n "$target" ] || target=/lib/firmware/$FIRMWARE - dd if=$source of=$target iflag=skip_bytes bs=$count skip=$offset count=1 2>/dev/null || \ + # dd doesn't handle partial reads from special files: use cat + cat $source | dd of=$target iflag=skip_bytes bs=$count skip=$offset count=1 2>/dev/null || \ caldata_die "failed to extract calibration data from $source" } @@ -73,13 +74,14 @@ caldata_sysfsload_from_file() { local offset=$(($2)) local count=$(($3)) + # dd doesn't handle partial reads from special files: use cat # test extract to /dev/null first - dd if=$source of=/dev/null iflag=skip_bytes bs=$count skip=$offset count=1 2>/dev/null || \ + cat $source | dd of=/dev/null iflag=skip_bytes bs=$count skip=$offset count=1 2>/dev/null || \ caldata_die "failed to extract calibration data from $source" # can't fail now echo 1 > /sys/$DEVPATH/loading - dd if=$source of=/sys/$DEVPATH/data iflag=skip_bytes bs=$count skip=$offset count=1 2>/dev/null + cat $source | dd of=/sys/$DEVPATH/data iflag=skip_bytes bs=$count skip=$offset count=1 2>/dev/null echo 0 > /sys/$DEVPATH/loading } |