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Fixed error check when truncating files to larger size

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This commit is contained in:
Christopher Haster
2018-02-04 13:48:44 -06:00
parent 809ffde60f
commit 6716b5580a
2 changed files with 28 additions and 3 deletions
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2
lfs.c
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@@ -1694,7 +1694,7 @@ int lfs_file_truncate(lfs_t *lfs, lfs_file_t *file, lfs_off_t size) {
// flush+seek if not already at end
if (file->pos != oldsize) {
int err = lfs_file_seek(lfs, file, 0, SEEK_END);
if (err) {
if (err < 0) {
return err;
}
}

29
tests/test_truncate.sh
View File

@@ -13,10 +13,12 @@ TEST
truncate_test() {
STARTSIZES="$1"
HOTSIZES="$2"
COLDSIZES="$3"
STARTSEEKS="$2"
HOTSIZES="$3"
COLDSIZES="$4"
tests/test.py << TEST
static const lfs_off_t startsizes[] = {$STARTSIZES};
static const lfs_off_t startseeks[] = {$STARTSEEKS};
static const lfs_off_t hotsizes[] = {$HOTSIZES};
lfs_mount(&lfs, &cfg) => 0;
@@ -33,6 +35,11 @@ tests/test.py << TEST
}
lfs_file_size(&lfs, &file[0]) => startsizes[i];
if (startseeks[i] != startsizes[i]) {
lfs_file_seek(&lfs, &file[0],
startseeks[i], LFS_SEEK_SET) => startseeks[i];
}
lfs_file_truncate(&lfs, &file[0], hotsizes[i]) => 0;
lfs_file_size(&lfs, &file[0]) => hotsizes[i];
@@ -107,18 +114,21 @@ TEST
echo "--- Cold shrinking truncate ---"
truncate_test \
"2*$LARGESIZE, 2*$LARGESIZE, 2*$LARGESIZE, 2*$LARGESIZE, 2*$LARGESIZE" \
"2*$LARGESIZE, 2*$LARGESIZE, 2*$LARGESIZE, 2*$LARGESIZE, 2*$LARGESIZE" \
"2*$LARGESIZE, 2*$LARGESIZE, 2*$LARGESIZE, 2*$LARGESIZE, 2*$LARGESIZE" \
" 0, $SMALLSIZE, $MEDIUMSIZE, $LARGESIZE, 2*$LARGESIZE"
echo "--- Cold expanding truncate ---"
truncate_test \
" 0, $SMALLSIZE, $MEDIUMSIZE, $LARGESIZE, 2*$LARGESIZE" \
" 0, $SMALLSIZE, $MEDIUMSIZE, $LARGESIZE, 2*$LARGESIZE" \
" 0, $SMALLSIZE, $MEDIUMSIZE, $LARGESIZE, 2*$LARGESIZE" \
"2*$LARGESIZE, 2*$LARGESIZE, 2*$LARGESIZE, 2*$LARGESIZE, 2*$LARGESIZE"
echo "--- Warm shrinking truncate ---"
truncate_test \
"2*$LARGESIZE, 2*$LARGESIZE, 2*$LARGESIZE, 2*$LARGESIZE, 2*$LARGESIZE" \
"2*$LARGESIZE, 2*$LARGESIZE, 2*$LARGESIZE, 2*$LARGESIZE, 2*$LARGESIZE" \
" 0, $SMALLSIZE, $MEDIUMSIZE, $LARGESIZE, 2*$LARGESIZE" \
" 0, 0, 0, 0, 0"
@@ -126,6 +136,21 @@ truncate_test \
echo "--- Warm expanding truncate ---"
truncate_test \
" 0, $SMALLSIZE, $MEDIUMSIZE, $LARGESIZE, 2*$LARGESIZE" \
" 0, $SMALLSIZE, $MEDIUMSIZE, $LARGESIZE, 2*$LARGESIZE" \
"2*$LARGESIZE, 2*$LARGESIZE, 2*$LARGESIZE, 2*$LARGESIZE, 2*$LARGESIZE" \
"2*$LARGESIZE, 2*$LARGESIZE, 2*$LARGESIZE, 2*$LARGESIZE, 2*$LARGESIZE"
echo "--- Mid-file shrinking truncate ---"
truncate_test \
"2*$LARGESIZE, 2*$LARGESIZE, 2*$LARGESIZE, 2*$LARGESIZE, 2*$LARGESIZE" \
" $LARGESIZE, $LARGESIZE, $LARGESIZE, $LARGESIZE, $LARGESIZE" \
" 0, $SMALLSIZE, $MEDIUMSIZE, $LARGESIZE, 2*$LARGESIZE" \
" 0, 0, 0, 0, 0"
echo "--- Mid-file expanding truncate ---"
truncate_test \
" 0, $SMALLSIZE, $MEDIUMSIZE, $LARGESIZE, 2*$LARGESIZE" \
" 0, 0, $SMALLSIZE, $MEDIUMSIZE, $LARGESIZE" \
"2*$LARGESIZE, 2*$LARGESIZE, 2*$LARGESIZE, 2*$LARGESIZE, 2*$LARGESIZE" \
"2*$LARGESIZE, 2*$LARGESIZE, 2*$LARGESIZE, 2*$LARGESIZE, 2*$LARGESIZE"