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Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail From: Janis Papanagnou <janis_papanagnou+ng@hotmail.com> Newsgroups: comp.lang.c Subject: Re: Buffer contents well-defined after fgets() reaches EOF ? Date: Mon, 10 Feb 2025 02:44:27 +0100 Organization: A noiseless patient Spider Lines: 19 Message-ID: <voblls$tfcn$1@dont-email.me> References: <vo9g74$fu8u$1@dont-email.me> <vo9hlo$g0to$1@dont-email.me> <vo9khf$ggd4$1@dont-email.me> <vobf3h$sefh$2@dont-email.me> <vobjdt$t5ka$1@dont-email.me> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Injection-Date: Mon, 10 Feb 2025 02:44:28 +0100 (CET) Injection-Info: dont-email.me; posting-host="9a53b9bbf9924f168baa28a2e377f8a7"; logging-data="966039"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX18/4QubcsYpL17uHoAhC1Lw" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 Cancel-Lock: sha1:UESNgd4H3nM4IWooyYGzJTTMhJ0= In-Reply-To: <vobjdt$t5ka$1@dont-email.me> Bytes: 1770 On 10.02.2025 02:06, Andrey Tarasevich wrote: > On Sun 2/9/2025 3:52 PM, Lawrence D'Oliveiro wrote: >> On Sat, 8 Feb 2025 23:12:44 -0800, Andrey Tarasevich wrote: >> >>> If `fgets` reads nothing (instant end-of-file), the entire buffer >>> remains untouched. >> >> You mean, only a single null byte gets written. This was actually what I feared some implementation might do (unless it's specified by the "C" standard, which luckily is, as has been shown and got quoted in this thread). > No. The buffer is not changed at all in such case. Which had been the good news. Janis