[osx] Properly handle 0 length on Windows implementation of flocking().

2022-12-12 19:46:30 +01:00 · 2022-12-12 19:46:30 +01:00 · 89751336d2
parent 0e3125e59c
commit 89751336d2
1 changed files with 4 additions and 0 deletions
--- a/osx.c
+++ b/osx.c
@ -93,6 +93,10 @@ static int flocking(FILE *fh, int mode, __int64 ofs, __int64 len)
        len = _filelengthi64(_fileno(fh));
        if (len < 0)
            goto fail;
+
+        len -= ofs;
+        if (len < 0)
+            len = 0;
        if (len > LONG_MAX) {
            errno = ERANGE;
            goto fail;