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correct mmap error check

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Update mmap error validation to check for MAP_FAILED instead of NULL.
POSIX specifies that mmap returns MAP_FAILED (-1) on failure.
This commit is contained in:
richardsonnick 2025-12-23 16:40:02 -05:00 • committed by Nick Terrell
parent 2107c8f189
commit bb1eedcf86
1 changed files with 3 additions and 1 deletions
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4
programs/fileio.c
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@ -1050,7 +1050,9 @@ static size_t FIO_setDictBufferMMap(FIO_Dict_t* dict, const char* fileName, FIO_
}
*bufferPtr = mmap(NULL, (size_t)fileSize, PROT_READ, MAP_PRIVATE, fileHandle, 0);
if (*bufferPtr==NULL) EXM_THROW(34, "%s", strerror(errno));
if (*bufferPtr == MAP_FAILED) {
EXM_THROW(34, "%s", strerror(errno))
}
close(fileHandle);
return (size_t)fileSize;