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Check for fread failure

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On failure fread may return either a short read or 0. Need to use
ferror to detect error versus eof.
This commit is contained in:
Peter Lesslie 2019-11-26 19:36:33 -06:00
parent a3a3c62b81
commit 8eb499d354
1 changed files with 7 additions and 2 deletions
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9
programs/fileio.c
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@ -1769,7 +1769,7 @@ static int FIO_passThrough(const FIO_prefs_t* const prefs,
size_t alreadyLoaded) size_t alreadyLoaded)
{ {
size_t const blockSize = MIN(64 KB, bufferSize); size_t const blockSize = MIN(64 KB, bufferSize);
size_t readFromInput = 1; size_t readFromInput;
unsigned storedSkips = 0; unsigned storedSkips = 0;
/* assumption : ress->srcBufferLoaded bytes already loaded and stored within buffer */ /* assumption : ress->srcBufferLoaded bytes already loaded and stored within buffer */
@ -1779,10 +1779,15 @@ static int FIO_passThrough(const FIO_prefs_t* const prefs,
return 1; return 1;
} } } }
while (readFromInput) { do {
readFromInput = fread(buffer, 1, blockSize, finput); readFromInput = fread(buffer, 1, blockSize, finput);
storedSkips = FIO_fwriteSparse(prefs, foutput, buffer, readFromInput, storedSkips); storedSkips = FIO_fwriteSparse(prefs, foutput, buffer, readFromInput, storedSkips);
} while (readFromInput == blockSize);
if (ferror(finput)) {
DISPLAYLEVEL(1, "Pass-through read error : %s\n", strerror(errno));
return 1;
} }
assert(feof(finput));
FIO_fwriteSparseEnd(prefs, foutput, storedSkips); FIO_fwriteSparseEnd(prefs, foutput, storedSkips);
return 0; return 0;