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Commit	Line	Data
	1	// -- mode: cpp; mode: fold --
	2	// Description /{{{/
	3	// $Id: file.cc,v 1.9.2.1 2004/01/16 18:58:50 mdz Exp $
	4	/* ######################################################################
	5
	6	File URI method for APT
	7
	8	This simply checks that the file specified exists, if so the relevant
	9	information is returned. If a .gz filename is specified then the file
	10	name with .gz removed will also be checked and information about it
	11	will be returned in Alt-*
	12
	13	##################################################################### */
	14	/}}}/
	15	// Include Files /{{{/
	16	#include <config.h>
	17
	18	#include <apt-pkg/aptconfiguration.h>
	19	#include <apt-pkg/error.h>
	20	#include <apt-pkg/hashes.h>
	21	#include <apt-pkg/fileutl.h>
	22	#include <apt-pkg/strutl.h>
	23	#include "aptmethod.h"
	24
	25	#include <string>
	26	#include <sys/stat.h>
	27
	28	#include <apti18n.h>
	29	/}}}/
	30
	31	class FileMethod : public aptMethod
	32	{
	33	virtual bool Fetch(FetchItem *Itm) APT_OVERRIDE;
	34
	35	public:
	36	FileMethod() : aptMethod("file", "1.0", SingleInstance \| SendConfig \| LocalOnly) {};
	37	};
	38
	39	// FileMethod::Fetch - Fetch a file /{{{/
	40	// ---------------------------------------------------------------------
	41	/* */
	42	bool FileMethod::Fetch(FetchItem *Itm)
	43	{
	44	URI Get = Itm->Uri;
	45	std::string File = Get.Path;
	46	FetchResult Res;
	47	if (Get.Host.empty() == false)
	48	return _error->Error(_("Invalid URI, local URIS must not start with //"));
	49
	50	struct stat Buf;
	51	// deal with destination files which might linger around
	52	if (lstat(Itm->DestFile.c_str(), &Buf) == 0)
	53	{
	54	if ((Buf.st_mode & S_IFREG) != 0)
	55	{
	56	if (Itm->LastModified == Buf.st_mtime && Itm->LastModified != 0)
	57	{
	58	HashStringList const hsl = Itm->ExpectedHashes;
	59	if (Itm->ExpectedHashes.VerifyFile(File))
	60	{
	61	Res.Filename = Itm->DestFile;
	62	Res.IMSHit = true;
	63	}
	64	}
	65	}
	66	}
	67	if (Res.IMSHit != true)
	68	RemoveFile("file", Itm->DestFile);
	69
	70	int olderrno = 0;
	71	// See if the file exists
	72	if (stat(File.c_str(),&Buf) == 0)
	73	{
	74	Res.Size = Buf.st_size;
	75	Res.Filename = File;
	76	Res.LastModified = Buf.st_mtime;
	77	Res.IMSHit = false;
	78	if (Itm->LastModified == Buf.st_mtime && Itm->LastModified != 0)
	79	{
	80	unsigned long long const filesize = Itm->ExpectedHashes.FileSize();
	81	if (filesize != 0 && filesize == Res.Size)
	82	Res.IMSHit = true;
	83	}
	84
	85	CalculateHashes(Itm, Res);
	86	}
	87	else
	88	olderrno = errno;
	89	if (Res.IMSHit == false)
	90	URIStart(Res);
	91
	92	// See if the uncompressed file exists and reuse it
	93	FetchResult AltRes;
	94	AltRes.Filename.clear();
	95	std::vector<std::string> extensions = APT::Configuration::getCompressorExtensions();
	96	for (std::vector<std::string>::const_iterator ext = extensions.begin(); ext != extensions.end(); ++ext)
	97	{
	98	if (APT::String::Endswith(File, *ext) == true)
	99	{
	100	std::string const unfile = File.substr(0, File.length() - ext->length());
	101	if (stat(unfile.c_str(),&Buf) == 0)
	102	{
	103	AltRes.Size = Buf.st_size;
	104	AltRes.Filename = unfile;
	105	AltRes.LastModified = Buf.st_mtime;
	106	AltRes.IMSHit = false;
	107	if (Itm->LastModified == Buf.st_mtime && Itm->LastModified != 0)
	108	AltRes.IMSHit = true;
	109	break;
	110	}
	111	// no break here as we could have situations similar to '.gz' vs '.tar.gz' here
	112	}
	113	}
	114
	115	if (AltRes.Filename.empty() == false)
	116	URIDone(Res,&AltRes);
	117	else if (Res.Filename.empty() == false)
	118	URIDone(Res);
	119	else
	120	{
	121	errno = olderrno;
	122	return _error->Errno(File.c_str(), _("File not found"));
	123	}
	124
	125	return true;
	126	}
	127	/}}}/
	128
	129	int main()
	130	{
	131	return FileMethod().Run();
	132	}