20 lines
636 B
Diff
20 lines
636 B
Diff
--- a/lib/openat.c
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+++ b/lib/openat.c
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@@ -57,9 +57,13 @@ rpl_openat (int fd, char const *file, in
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va_list arg;
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va_start (arg, flags);
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- /* Assume that mode_t is passed compatibly with mode_t's type
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- after argument promotion. */
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- mode = va_arg (arg, mode_t);
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+ /* If mode_t is narrower than int, use the promoted type (int),
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+ not mode_t. Use sizeof to guess whether mode_t is nerrower;
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+ we don't know of any practical counterexamples. */
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+ if (sizeof (mode_t) < sizeof (int))
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+ mode = va_arg (arg, int);
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+ else
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+ mode = va_arg (arg, mode_t);
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va_end (arg);
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}
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