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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/acquire-method.h>
	19	#include <apt-pkg/aptconfiguration.h>
	20	#include <apt-pkg/error.h>
	21	#include <apt-pkg/hashes.h>
	22	#include <apt-pkg/fileutl.h>
	23	#include <apt-pkg/strutl.h>
	24	#include "aptmethod.h"
	25
	26	#include <string>
	27	#include <sys/stat.h>
	28
	29	#include <apti18n.h>
	30	/}}}/
	31
	32	class FileMethod : public aptMethod
	33	{
	34	virtual bool Fetch(FetchItem *Itm) APT_OVERRIDE;
	35
	36	public:
	37	FileMethod() : aptMethod("file", "1.0", SingleInstance \| SendConfig \| LocalOnly) {};
	38	};
	39
	40	// FileMethod::Fetch - Fetch a file /{{{/
	41	// ---------------------------------------------------------------------
	42	/* */
	43	bool FileMethod::Fetch(FetchItem *Itm)
	44	{
	45	URI Get = Itm->Uri;
	46	std::string File = Get.Path;
	47	FetchResult Res;
	48	if (Get.Host.empty() == false)
	49	return _error->Error(_("Invalid URI, local URIS must not start with //"));
	50
	51	struct stat Buf;
	52	// deal with destination files which might linger around
	53	if (lstat(Itm->DestFile.c_str(), &Buf) == 0)
	54	{
	55	if ((Buf.st_mode & S_IFREG) != 0)
	56	{
	57	if (Itm->LastModified == Buf.st_mtime && Itm->LastModified != 0)
	58	{
	59	HashStringList const hsl = Itm->ExpectedHashes;
	60	if (Itm->ExpectedHashes.VerifyFile(File))
	61	{
	62	Res.Filename = Itm->DestFile;
	63	Res.IMSHit = true;
	64	}
	65	}
	66	}
	67	}
	68	if (Res.IMSHit != true)
	69	RemoveFile("file", Itm->DestFile);
	70
	71	int olderrno = 0;
	72	// See if the file exists
	73	if (stat(File.c_str(),&Buf) == 0)
	74	{
	75	Res.Size = Buf.st_size;
	76	Res.Filename = File;
	77	Res.LastModified = Buf.st_mtime;
	78	Res.IMSHit = false;
	79	if (Itm->LastModified == Buf.st_mtime && Itm->LastModified != 0)
	80	{
	81	unsigned long long const filesize = Itm->ExpectedHashes.FileSize();
	82	if (filesize != 0 && filesize == Res.Size)
	83	Res.IMSHit = true;
	84	}
	85
	86	CalculateHashes(Itm, Res);
	87	}
	88	else
	89	olderrno = errno;
	90	if (Res.IMSHit == false)
	91	URIStart(Res);
	92
	93	// See if the uncompressed file exists and reuse it
	94	FetchResult AltRes;
	95	AltRes.Filename.clear();
	96	std::vector<std::string> extensions = APT::Configuration::getCompressorExtensions();
	97	for (std::vector<std::string>::const_iterator ext = extensions.begin(); ext != extensions.end(); ++ext)
	98	{
	99	if (APT::String::Endswith(File, *ext) == true)
	100	{
	101	std::string const unfile = File.substr(0, File.length() - ext->length());
	102	if (stat(unfile.c_str(),&Buf) == 0)
	103	{
	104	AltRes.Size = Buf.st_size;
	105	AltRes.Filename = unfile;
	106	AltRes.LastModified = Buf.st_mtime;
	107	AltRes.IMSHit = false;
	108	if (Itm->LastModified == Buf.st_mtime && Itm->LastModified != 0)
	109	AltRes.IMSHit = true;
	110	break;
	111	}
	112	// no break here as we could have situations similar to '.gz' vs '.tar.gz' here
	113	}
	114	}
	115
	116	if (AltRes.Filename.empty() == false)
	117	URIDone(Res,&AltRes);
	118	else if (Res.Filename.empty() == false)
	119	URIDone(Res);
	120	else
	121	{
	122	errno = olderrno;
	123	return _error->Errno(File.c_str(), _("File not found"));
	124	}
	125
	126	return true;
	127	}
	128	/}}}/
	129
	130	int main()
	131	{
	132	setlocale(LC_ALL, "");
	133
	134	FileMethod Mth;
	135	return Mth.Run();
	136	}