369 lines
9.1 KiB
C++
369 lines
9.1 KiB
C++
#ifndef lint
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static char rcsid[] = "@(#$Id: fstreewalk.cpp,v 1.15 2007-12-13 06:58:22 dockes Exp $ (C) 2004 J.F.Dockes";
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#endif
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef TEST_FSTREEWALK
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#include <dirent.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <fnmatch.h>
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#include <cstring>
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#include <algorithm>
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#include <sstream>
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#include <list>
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#include "debuglog.h"
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#include "pathut.h"
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#include "fstreewalk.h"
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#ifndef NO_NAMESPACES
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using namespace std;
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#endif /* NO_NAMESPACES */
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class FsTreeWalker::Internal {
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int options;
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stringstream reason;
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list<string> skippedNames;
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list<string> skippedPaths;
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int errors;
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void logsyserr(const char *call, const string ¶m)
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{
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errors++;
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reason << call << "(" << param << ") : " << errno << " : " <<
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strerror(errno) << endl;
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}
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friend class FsTreeWalker;
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};
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FsTreeWalker::FsTreeWalker(int opts)
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{
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data = new Internal;
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if (data) {
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data->options = opts;
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data->errors = 0;
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}
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}
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FsTreeWalker::~FsTreeWalker()
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{
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delete data;
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}
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void FsTreeWalker::setOpts(Options opts)
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{
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if (data) {
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data->options = opts;
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}
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}
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string FsTreeWalker::getReason()
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{
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return data->reason.str();
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}
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int FsTreeWalker::getErrCnt()
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{
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return data->errors;
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}
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bool FsTreeWalker::addSkippedName(const string& pattern)
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{
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if (find(data->skippedNames.begin(),
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data->skippedNames.end(), pattern) == data->skippedNames.end())
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data->skippedNames.push_back(pattern);
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return true;
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}
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bool FsTreeWalker::setSkippedNames(const list<string> &patterns)
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{
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data->skippedNames = patterns;
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return true;
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}
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bool FsTreeWalker::inSkippedNames(const string& name)
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{
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list<string>::const_iterator it;
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for (it = data->skippedNames.begin();
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it != data->skippedNames.end(); it++) {
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if (fnmatch(it->c_str(), name.c_str(), 0) == 0) {
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return true;
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}
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}
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return false;
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}
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bool FsTreeWalker::addSkippedPath(const string& ipath)
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{
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string path = (data->options & FtwNoCanon) ? ipath : path_canon(ipath);
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if (find(data->skippedPaths.begin(),
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data->skippedPaths.end(), path) == data->skippedPaths.end())
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data->skippedPaths.push_back(path);
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return true;
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}
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bool FsTreeWalker::setSkippedPaths(const list<string> &paths)
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{
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data->skippedPaths = paths;
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for (list<string>::iterator it = data->skippedPaths.begin();
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it != data->skippedPaths.end(); it++)
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if (!(data->options & FtwNoCanon))
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*it = path_canon(*it);
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return true;
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}
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bool FsTreeWalker::inSkippedPaths(const string& path, bool ckparents)
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{
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int fnmflags = FNM_PATHNAME;
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#ifdef FNM_LEADING_DIR
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if (ckparents)
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fnmflags |= FNM_LEADING_DIR;
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#endif
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list<string>::const_iterator it;
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for (it = data->skippedPaths.begin();
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it != data->skippedPaths.end(); it++) {
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#ifndef FNM_LEADING_DIR
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if (ckparents) {
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string mpath = path;
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while (mpath.length() > 2) {
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if (fnmatch(it->c_str(), mpath.c_str(), fnmflags) == 0)
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return true;
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mpath = path_getfather(mpath);
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}
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} else
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#endif /* FNM_LEADING_DIR */
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if (fnmatch(it->c_str(), path.c_str(), fnmflags) == 0) {
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return true;
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}
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}
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return false;
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}
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FsTreeWalker::Status FsTreeWalker::walk(const string& _top,
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FsTreeWalkerCB& cb)
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{
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string top = (data->options & FtwNoCanon) ? _top : path_canon(_top);
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struct stat st;
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int statret;
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// We always follow symlinks at this point. Makes more sense.
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statret = stat(top.c_str(), &st);
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if (statret == -1) {
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data->logsyserr("stat", top);
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return FtwError;
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}
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return iwalk(top, &st, cb);
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}
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// Note that the 'norecurse' flag is handled as part of the directory read.
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// This means that we always go into the top 'walk()' parameter if it is a
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// directory, even if norecurse is set. Bug or Feature ?
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FsTreeWalker::Status FsTreeWalker::iwalk(const string &top,
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struct stat *stp,
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FsTreeWalkerCB& cb)
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{
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Status status = FtwOk;
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// Handle the parameter
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if (S_ISDIR(stp->st_mode)) {
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if ((status = cb.processone(top, stp, FtwDirEnter)) &
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(FtwStop|FtwError)) {
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return status;
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}
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} else if (S_ISREG(stp->st_mode)) {
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return cb.processone(top, stp, FtwRegular);
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} else {
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return status;
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}
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// This is a directory, read it and process entries:
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DIR *d = opendir(top.c_str());
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if (d == 0) {
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data->logsyserr("opendir", top);
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switch (errno) {
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case EPERM:
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case EACCES:
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goto out;
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default:
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status = FtwError;
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goto out;
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}
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}
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struct dirent *ent;
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while ((ent = readdir(d)) != 0) {
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// Skip . and ..
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if (!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, ".."))
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continue;
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// Skipped file names match ?
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if (!data->skippedNames.empty()) {
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if (inSkippedNames(ent->d_name))
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goto skip;
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}
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{
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string fn = path_cat(top, ent->d_name);
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struct stat st;
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int statret = (data->options & FtwFollow) ? stat(fn.c_str(), &st) :
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lstat(fn.c_str(), &st);
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if (statret == -1) {
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data->logsyserr("stat", fn);
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continue;
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}
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if (!data->skippedPaths.empty()) {
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// We do not check the ancestors. This means that you can have
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// a topdirs member under a skippedPath, to index a portion of
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// an ignored area. This is the way it had always worked, but
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// this was broken by 1.13.00 and the systematic use of
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// FNM_LEADING_DIR
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if (inSkippedPaths(fn, false))
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goto skip;
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}
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if (S_ISDIR(st.st_mode)) {
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if (data->options & FtwNoRecurse) {
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status = cb.processone(fn, &st, FtwDirEnter);
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} else {
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status = iwalk(fn, &st, cb);
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}
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if (status & (FtwStop|FtwError))
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goto out;
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// No DirReturn call when not recursing
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if (!(data->options & FtwNoRecurse))
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if ((status = cb.processone(top, &st, FtwDirReturn))
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& (FtwStop|FtwError))
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goto out;
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} else if (S_ISREG(st.st_mode)) {
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if ((status = cb.processone(fn, &st, FtwRegular)) &
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(FtwStop|FtwError)) {
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goto out;
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}
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}
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}
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skip: ;
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// We skip other file types (devices etc...)
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}
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out:
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if (d)
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closedir(d);
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return status;
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}
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#else // TEST_FSTREEWALK
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#include <sys/stat.h>
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#include <iostream>
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#include "fstreewalk.h"
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using namespace std;
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static int op_flags;
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#define OPT_MOINS 0x1
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#define OPT_p 0x2
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#define OPT_P 0x4
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#define OPT_r 0x8
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#define OPT_c 0x10
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class myCB : public FsTreeWalkerCB {
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public:
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FsTreeWalker::Status processone(const string &path,
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const struct stat *st,
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FsTreeWalker::CbFlag flg)
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{
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if (flg == FsTreeWalker::FtwDirEnter) {
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if (op_flags & OPT_r)
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cout << path << endl;
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else
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cout << "[Entering " << path << "]" << endl;
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} else if (flg == FsTreeWalker::FtwDirReturn) {
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cout << "[Returning to " << path << "]" << endl;
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} else if (flg == FsTreeWalker::FtwRegular) {
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cout << path << endl;
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}
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return FsTreeWalker::FtwOk;
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}
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};
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static const char *thisprog;
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static char usage [] =
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"trfstreewalk [-p pattern] [-P ignpath] [-r] [-c] topdir\n"
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" -r : norecurse\n"
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" -c : no path canonification\n"
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;
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static void
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Usage(void)
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{
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fprintf(stderr, "%s: usage:\n%s", thisprog, usage);
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exit(1);
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}
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int main(int argc, const char **argv)
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{
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list<string> patterns;
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list<string> paths;
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thisprog = argv[0];
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argc--; argv++;
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while (argc > 0 && **argv == '-') {
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(*argv)++;
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if (!(**argv))
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/* Cas du "adb - core" */
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Usage();
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while (**argv)
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switch (*(*argv)++) {
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case 'r': op_flags |= OPT_r; break;
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case 'c': op_flags |= OPT_c; break;
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case 'p': op_flags |= OPT_p; if (argc < 2) Usage();
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patterns.push_back(*(++argv));
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argc--;
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goto b1;
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case 'P': op_flags |= OPT_P; if (argc < 2) Usage();
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paths.push_back(*(++argv));
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argc--;
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goto b1;
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default: Usage(); break;
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}
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b1: argc--; argv++;
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}
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if (argc != 1)
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Usage();
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string topdir = *argv++;argc--;
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int opt = 0;
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if (op_flags & OPT_r)
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opt |= FsTreeWalker::FtwNoRecurse;
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if (op_flags & OPT_c)
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opt |= FsTreeWalker::FtwNoCanon;
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FsTreeWalker walker(opt);
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walker.setSkippedNames(patterns);
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walker.setSkippedPaths(paths);
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myCB cb;
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walker.walk(topdir, cb);
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if (walker.getErrCnt() > 0)
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cout << walker.getReason();
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}
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#endif // TEST_FSTREEWALK
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