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From: Alexey Tourbin <at@altlinux.ru>
To: devel@lists.altlinux.org
Subject: Re: [devel] Владение директориями в rpm
Date: Mon, 1 Dec 2008 15:09:09 +0300
Message-ID: <20081201120908.GD25270@altlinux.org> (raw)
In-Reply-To: <20081201115720.GA17953@imap.altlinux.org>

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On Mon, Dec 01, 2008 at 02:57:20PM +0300, Grigory Batalov wrote:
> Что случится, если два разных пакета содержат (владеют) одну и ту же
> директорию?

Если директории "одинаковые", то ничего не случится -- rpm "поделит"
этот каталог между двумя пакетами, и будет пробовать удалять его только
при удалении последнего пакета, который владеет этим каталогом.

Если же директории "разные", то будет файловый конфликт.
Это касается и файлов.

lib/transaction.c:
   878	static int filecmp(const TFI_t fi1, const int ix1, const TFI_t fi2, const int ix2)
   879		/*@*/
   880	{
   881	    uint_16 m1 = fi1->fmodes[ix1], m2 = fi2->fmodes[ix2];
   882	    uint_32 f1 = fi1->fflags[ix1], f2 = fi2->fflags[ix2];
   883	    const char *u1 = fi1->fuser[ix1], *u2 = fi2->fuser[ix2];
   884	    const char *g1 = fi1->fgroup[ix1], *g2 = fi2->fgroup[ix2];
   885	
   886	    /* both file type and permissions must match */
   887	    if (m1 != m2)
   888		return 1;
   889	
   890	    /* ownership must also match */
   891	    if (strcmp(u1, u2) || strcmp(g1, g2))
   892		return 1;
   893	
   894	    if ((f1 | f2) & RPMFILE_GHOST)
   895		/* one or both %ghost files, no extra check */
   896		;
   897	    else if (S_ISLNK(m1)) {
   898		/* symlinks must have the same target */
   899		const char *l1 = fi1->flinks[ix1], *l2 = fi2->flinks[ix2];
   900		if (strcmp(l1, l2))
   901		    return 1;
   902	    }
   903	    else if (S_ISREG(m1)) {
   904		/* regular files must have the same md5 sum */
   905		const char *md51 = fi1->fmd5s[ix1], *md52 = fi2->fmd5s[ix2];
   906		if (strcmp(md51, md52))
   907		    return 1;
   908	    }
   909	
   910	    /* e.g. mtime difference is immaterial */
   911	    return 0;
   912	}

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  parent reply	other threads:[~2008-12-01 12:09 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-12-01 11:57 Grigory Batalov
2008-12-01 12:06 ` Led
2008-12-01 12:09 ` Alexey Tourbin [this message]
2008-12-01 12:43 ` Vitaly Ostanin
2008-12-01 12:57   ` Grigory Batalov

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