From: "Dmitry V. Levin" <ldv@altlinux.org> To: ALT Linux Sisyphus discussion list <sisyphus@lists.altlinux.org> Subject: Re: [sisyphus] malloc behaviour Date: Mon, 27 Nov 2006 01:44:30 +0300 Message-ID: <20061126224430.GB23346@basalt.office.altlinux.org> (raw) In-Reply-To: <20061126222307.GA12395@rock.home> [-- Attachment #1: Type: text/plain, Size: 1204 bytes --] On Mon, Nov 27, 2006 at 04:23:07AM +0600, Slava Semushin wrote: > --- Michael Shigorin 2006-11-26 21:43:56 +0200 > +++ Slava Semushin 2006-11-27 04:17:57 +0600 > > MS> Спамит cron (точнее, sysstat): > MS> Date: Sun, 26 Nov 2006 20:20:01 +0200 (EET) > MS> From: root@home (Cron Daemon) > MS> To: root@home > MS> Subject: Cron <root@home> /usr/lib/sa/sa1 1 1 > MS> realloc: Success > > Ну так это ошибка. Мне об этой ситуации Юра Каширин рассказывал: > malloc()/realloc() в случае ошибки не устанавливают errno, поэтому > если её использовать, то могут получить вот такие результаты. malloc(3) придерживается другого мнения: "The Unix98 standard requires malloc(), calloc(), and realloc() to set errno to ENOMEM upon failure. Glibc assumes that this is done (and the glibc versions of these routines do this); if you use a private malloc implementation that does not set errno, then certain library routines may fail without having a reason in errno." > Там код типа такого, наверное: > > ptr = realloc(...); > if (ptr == NULL) { > perror("realloc"); > exit(1); > } Для таких случаев давно придумали xrealloc. -- ldv [-- Attachment #2: Type: application/pgp-signature, Size: 189 bytes --]
next prev parent reply other threads:[~2006-11-26 22:44 UTC|newest] Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top 2006-11-26 19:43 [sisyphus] dist-upgrade from 3.0 log [attn: ldv] Michael Shigorin 2006-11-26 19:52 ` Valery V. Inozemtsev 2006-11-26 20:05 ` Damir Shayhutdinov 2006-11-26 21:35 ` Michael Shigorin 2006-11-26 22:00 ` Sergey 2006-11-27 9:53 ` Sergey Vlasov 2006-11-27 10:05 ` Michael Shigorin 2006-11-26 22:23 ` Slava Semushin 2006-11-26 22:22 ` Michael Shigorin 2006-11-26 22:37 ` Slava Semushin 2006-11-26 22:45 ` Slava Semushin 2006-11-26 22:51 ` [sisyphus] malloc behaviour Dmitry V. Levin 2006-11-27 9:20 ` [sisyphus] [JT] " Michael Shigorin 2006-11-26 22:44 ` Dmitry V. Levin [this message] 2006-11-27 15:30 ` [sisyphus] dist-upgrade from 3.0 log [attn: ldv] Igor Zubkov
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