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fstreewalk.cpp    210 lines (179 with data), 4.4 kB

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#ifndef lint
static char rcsid[] = "@(#$Id: fstreewalk.cpp,v 1.6 2005-12-13 12:42:59 dockes Exp $ (C) 2004 J.F.Dockes";
#endif
#ifndef TEST_FSTREEWALK
#include <dirent.h>
#include <sys/stat.h>
#include <errno.h>
#include <fnmatch.h>
#include <sstream>
#include <list>
#include "debuglog.h"
#include "pathut.h"
#include "fstreewalk.h"
#ifndef NO_NAMESPACES
using namespace std;
#endif /* NO_NAMESPACES */
class FsTreeWalker::Internal {
Options options;
stringstream reason;
list<string> skippedNames;
int errors;
void logsyserr(const char *call, const string &param)
{
errors++;
reason << call << "(" << param << ") : " << errno << " : " <<
strerror(errno) << endl;
}
friend class FsTreeWalker;
};
FsTreeWalker::FsTreeWalker(Options opts)
{
data = new Internal;
if (data) {
data->options = opts;
data->errors = 0;
}
}
FsTreeWalker::~FsTreeWalker()
{
delete data;
}
string FsTreeWalker::getReason()
{
return data->reason.str();
}
int FsTreeWalker::getErrCnt()
{
return data->errors;
}
bool FsTreeWalker::addSkippedName(const string& pattern)
{
data->skippedNames.push_back(pattern);
return true;
}
void FsTreeWalker::clearSkippedNames()
{
data->skippedNames.clear();
}
FsTreeWalker::Status FsTreeWalker::walk(const string &top,
FsTreeWalkerCB& cb)
{
Status status = FtwOk;
struct stat st;
int statret;
// Handle the top entry
statret = (data->options & FtwFollow) ? stat(top.c_str(), &st) :
lstat(top.c_str(), &st);
if (statret == -1) {
data->logsyserr("stat", top);
return FtwError;
}
if (S_ISDIR(st.st_mode)) {
if ((status = cb.processone(top, &st, FtwDirEnter)) &
(FtwStop|FtwError)) {
return status;
}
} else if (S_ISREG(st.st_mode)) {
return cb.processone(top, &st, FtwRegular);
} else {
return status;
}
// Handle directory entries
DIR *d = opendir(top.c_str());
if (d == 0) {
data->logsyserr("opendir", top);
switch (errno) {
case EPERM:
case EACCES:
goto out;
default:
status = FtwError;
goto out;
}
}
struct dirent *ent;
while ((ent = readdir(d)) != 0) {
// We do process hidden files for now, only skip . and ..
if (!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, ".."))
continue;
if (!data->skippedNames.empty()) {
list<string>::const_iterator it;
for (it = data->skippedNames.begin();
it != data->skippedNames.end(); it++) {
if (fnmatch(it->c_str(), ent->d_name, 0) == 0) {
//fprintf(stderr,
//"Skipping [%s] because of pattern match\n", ent->d_name);
goto skip;
}
}
}
{
string fn = path_cat(top, ent->d_name);
struct stat st;
int statret = (data->options & FtwFollow) ? stat(fn.c_str(), &st) :
lstat(fn.c_str(), &st);
if (statret == -1) {
data->logsyserr("stat", fn);
continue;
}
if (S_ISDIR(st.st_mode)) {
if (data->options & FtwNoRecurse) {
status = cb.processone(fn, &st, FtwDirEnter);
} else {
status=walk(fn, cb);
}
if (status & (FtwStop|FtwError))
goto out;
if ((status = cb.processone(top, &st, FtwDirReturn))
& (FtwStop|FtwError))
goto out;
} else if (S_ISREG(st.st_mode)) {
if ((status = cb.processone(fn, &st, FtwRegular)) &
(FtwStop|FtwError)) {
goto out;
}
}
}
skip: ;
// We skip other file types (devices etc...)
}
out:
if (d)
closedir(d);
return status;
}
#else // TEST_FSTREEWALK
#include <sys/stat.h>
#include <iostream>
#include "fstreewalk.h"
using namespace std;
class myCB : public FsTreeWalkerCB {
public:
FsTreeWalker::Status processone(const string &path,
const struct stat *st,
FsTreeWalker::CbFlag flg)
{
if (flg == FsTreeWalker::FtwDirEnter) {
cout << "[Entering " << path << "]" << endl;
} else if (flg == FsTreeWalker::FtwDirReturn) {
cout << "[Returning to " << path << "]" << endl;
} else if (flg == FsTreeWalker::FtwRegular) {
cout << path << endl;
}
return FsTreeWalker::FtwOk;
}
};
int main(int argc, const char **argv)
{
if (argc != 2) {
cerr << "Usage: fstreewalk <topdir>" << endl;
exit(1);
}
FsTreeWalker walker;
myCB cb;
walker.walk(argv[1], cb);
if (walker.getErrCnt() > 0)
cout << walker.getReason();
}
#endif // TEST_FSTREEWALK