Date: Wed, 12 Sep 2018 15:46:35 -0400 From: Rich Felker <dalias@...c.org> To: musl@...ts.openwall.com Subject: Re: string-backed FILEs mess On Wed, Sep 12, 2018 at 09:30:22PM +0200, Markus Wichmann wrote: > On Wed, Sep 12, 2018 at 01:48:37PM -0500, A. Wilcox wrote: > > Happy early Hallowe'en: > > > > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87096 > > > > You know, if I were programming on Linux professionally rather than as a > hobby, stuff like this would drive me to drink. I mean, in this case it > is a return value on a pathological case, but actually, it's sort of my > point: C says, snprintf() is undefined with a buffer size of more than > INT_MAX, POSIX defines it, and GCC just goes with the ISO-C version -- > because they can? Great! In this case, it's not undefined. ISO C defines it as success (there's nothing erroneous about the buffer being large; it's only an error if the output would exceed INT_MAX in length). POSIX then erroneously (because it nominally extends C and defers to it in case of accidental conflict) redefines it as an error. Rich
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