/* Copyright (C) 2004 J.F.Dockes 
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the
 *   Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
#include "autoconfig.h"

#include <stdio.h>
#include <signal.h>
#include <errno.h>
#include <fnmatch.h>
#ifndef _WIN32
#include <sys/time.h>
#include <sys/resource.h>
#else
#include <direct.h>
#endif
#include "safefcntl.h"
#include "safeunistd.h"

#include <iostream>
#include <list>
#include <string>
#include <cstdlib>

using namespace std;

#include "log.h"
#include "rclinit.h"
#include "indexer.h"
#include "smallut.h"
#include "chrono.h"
#include "pathut.h"
#include "rclutil.h"
#include "rclmon.h"
#include "x11mon.h"
#include "cancelcheck.h"
#include "rcldb.h"
#include "readfile.h"
#ifndef DISABLE_WEB_INDEXER
#include "webqueue.h"
#endif
#include "recollindex.h"
#include "fsindexer.h"
#ifndef _WIN32
#include "rclionice.h"
#endif
#include "execmd.h"
#include "checkretryfailed.h"
#include "idxstatus.h"

// Command line options
static int     op_flags;
#define OPT_MOINS 0x1
#define OPT_C 0x1     
#define OPT_D 0x2     
#define OPT_E 0x4     
#define OPT_K 0x8     
#define OPT_P 0x10    
#define OPT_R 0x20    
#define OPT_S 0x40    
#define OPT_Z 0x80    
#define OPT_b 0x100   
#define OPT_c 0x200   
#define OPT_e 0x400   
#define OPT_f 0x800   
#define OPT_h 0x1000  
#define OPT_i 0x2000  
#define OPT_k 0x4000  
#define OPT_l 0x8000  
#define OPT_m 0x10000 
#define OPT_n 0x20000
#define OPT_p 0x40000
#define OPT_r 0x80000 
#define OPT_s 0x100000
#define OPT_w 0x200000
#define OPT_x 0x400000
#define OPT_z 0x800000

ReExec *o_reexec;

// Globals for atexit cleanup
static ConfIndexer *confindexer;

// This is set as an atexit routine, 
static void cleanup()
{
    deleteZ(confindexer);
    recoll_exitready();
}

// Receive status updates from the ongoing indexing operation
// Also check for an interrupt request and return the info to caller which
// should subsequently orderly terminate what it is doing.
class MyUpdater : public DbIxStatusUpdater {
public:
    MyUpdater(const RclConfig *config) 
        : m_file(config->getIdxStatusFile().c_str()),
          m_stopfilename(config->getIdxStopFile()),
          m_prevphase(DbIxStatus::DBIXS_NONE) {
        // The total number of files included in the index is actually
        // difficult to compute from the index itself. For display
        // purposes, we save it in the status file from indexing to
        // indexing (mostly...)
        string stf;
        if (m_file.get("totfiles", stf)) {
            status.totfiles = atoi(stf.c_str());
        }
    }

    virtual bool update() 
    {
        // Update the status file. Avoid doing it too often. Always do
        // it at the end (status DONE)
        if (status.phase == DbIxStatus::DBIXS_DONE || 
            status.phase != m_prevphase || m_chron.millis() > 300) {
            if (status.totfiles < status.filesdone ||
                status.phase == DbIxStatus::DBIXS_DONE) {
                status.totfiles = status.filesdone;
            }
            m_prevphase = status.phase;
            m_chron.restart();
            m_file.holdWrites(true);
            m_file.set("phase", int(status.phase));
            m_file.set("docsdone", status.docsdone);
            m_file.set("filesdone", status.filesdone);
            m_file.set("fileerrors", status.fileerrors);
            m_file.set("dbtotdocs", status.dbtotdocs);
            m_file.set("totfiles", status.totfiles);
            m_file.set("fn", status.fn);
            m_file.set("hasmonitor", status.hasmonitor);
            m_file.holdWrites(false);
        }
        if (path_exists(m_stopfilename)) {
            LOGINF("recollindex: asking indexer to stop because " <<
                   m_stopfilename << " exists\n");
            unlink(m_stopfilename.c_str());
            stopindexing = true;
        }
        if (stopindexing) {
            return false;
        }

#ifndef DISABLE_X11MON
        // If we are in the monitor, we also need to check X11 status
        // during the initial indexing pass (else the user could log
        // out and the indexing would go on, not good (ie: if the user
        // logs in again, the new recollindex will fail).
        if ((op_flags & OPT_m) && !(op_flags & OPT_x) && !x11IsAlive()) {
            LOGDEB("X11 session went away during initial indexing pass\n");
            stopindexing = true;
            return false;
        }
#endif
        return true;
    }

private:
    ConfSimple m_file;
    string m_stopfilename;
    Chrono m_chron;
    DbIxStatus::Phase m_prevphase;
};
static MyUpdater *updater;

// This holds the state of topdirs (exist+nonempty) on indexing
// startup. If it changes after a resume from sleep we interrupt the
// indexing (the assumption being that a volume has been mounted or
// unmounted while we slept). This is not foolproof as the user can
// always pull out a removable volume while we work. It just avoids a
// harmful purge in a common case.
static vector<string> o_topdirs;
static vector<bool> o_topdirs_emptiness;

bool topdirs_state(vector<bool> tdlstate)
{
    tdlstate.clear();
    for (const auto& dir : o_topdirs) {
        tdlstate.push_back(path_empty(dir));
    }
    return true;
}
    
static void sigcleanup(int sig)
{
    if (sig == RCLSIG_RESUME) {
        vector<bool> emptiness;
        topdirs_state(emptiness);
        if (emptiness != o_topdirs_emptiness) {
            string msg = "Recollindex: resume: topdirs state changed while "
                "we were sleeping\n";
            cerr << msg;
            LOGDEB(msg);
            CancelCheck::instance().setCancel();
            stopindexing = 1;
        }
    } else {
        cerr << "Recollindex: got signal " << sig <<
            ", registering stop request\n";
        LOGDEB("Got signal " << sig << ", registering stop request\n");
        CancelCheck::instance().setCancel();
        stopindexing = 1;
    }
}

static void makeIndexerOrExit(RclConfig *config, bool inPlaceReset)
{
    if (!confindexer) {
        confindexer = new ConfIndexer(config, updater);
        if (inPlaceReset)
            confindexer->setInPlaceReset();
    }
    if (!confindexer) {
        cerr << "Cannot create indexer" << endl;
        exit(1);
    }
}

void rclIxIonice(const RclConfig *config)
{
    PRETEND_USE(config);
#ifndef _WIN32
    string clss, classdata;
    if (!config->getConfParam("monioniceclass", clss) || clss.empty())
        clss = "3";
    // Classdata may be empty (must be for idle class)
    config->getConfParam("monioniceclassdata", classdata);
    rclionice(clss, classdata);
#endif
}

static void setMyPriority(const RclConfig *config)
{
    PRETEND_USE(config);
#ifndef _WIN32
    int prio{19};
    std::string sprio;
    config->getConfParam("idxniceprio", sprio);
    if (!sprio.empty()) {
        prio = atoi(sprio.c_str());
    }
    if (setpriority(PRIO_PROCESS, 0, prio) != 0) {
        LOGINFO("recollindex: can't setpriority(), errno " << errno << "\n");
    }
    // Try to ionice. This does not work on all platforms
    rclIxIonice(config);
#endif
}


class MakeListWalkerCB : public FsTreeWalkerCB {
public:
    MakeListWalkerCB(list<string>& files, const vector<string>& selpats)
        : m_files(files), m_pats(selpats)
    {
    }
    virtual FsTreeWalker::Status 
    processone(const string& fn, const struct PathStat *,
               FsTreeWalker::CbFlag flg) {
        if (flg== FsTreeWalker::FtwDirEnter || flg == FsTreeWalker::FtwRegular){
            if (m_pats.empty()) {
                cerr << "Selecting " << fn << endl;
                m_files.push_back(fn);
            } else {
                for (vector<string>::const_iterator it = m_pats.begin();
                     it != m_pats.end(); it++) {
                    if (fnmatch(it->c_str(), fn.c_str(), 0) == 0) {
                        m_files.push_back(fn);
                        break;
                    }
                }
            }
        }
        return FsTreeWalker::FtwOk;
    }
    list<string>& m_files;
    const vector<string>& m_pats;
};

// Build a list of things to index, then call purgefiles and/or
// indexfiles.  This is basically the same as find xxx | recollindex
// -i [-e] without the find (so, simpler but less powerfull)
bool recursive_index(RclConfig *config, const string& top, 
                     const vector<string>& selpats)
{
    list<string> files;
    MakeListWalkerCB cb(files, selpats);
    FsTreeWalker walker;
    walker.walk(top, cb);
    bool ret = false;
    if (op_flags & OPT_e) {
        if (!(ret = purgefiles(config, files))) {
            return ret;
        }
    }
    if (!(op_flags & OPT_e) || ((op_flags & OPT_e) &&(op_flags & OPT_i))) {
        ret = indexfiles(config, files);
    }
    return ret;
}

// Index a list of files. We just call the top indexer method, which
// will sort out what belongs to the indexed trees and call the
// appropriate indexers.
//
// This is called either from the command line or from the monitor. In
// this case we're called repeatedly in the same process, and the
// confindexer is only created once by makeIndexerOrExit (but the db closed and
// flushed every time)
bool indexfiles(RclConfig *config, list<string> &filenames)
{
    if (filenames.empty())
        return true;
    makeIndexerOrExit(config, (op_flags & OPT_Z) != 0);
    // The default is to retry failed files
    int indexerFlags = ConfIndexer::IxFNone; 
    if (op_flags & OPT_K) 
        indexerFlags |= ConfIndexer::IxFNoRetryFailed; 
    if (op_flags & OPT_f)
        indexerFlags |= ConfIndexer::IxFIgnoreSkip;
    if (op_flags & OPT_P) {
        indexerFlags |= ConfIndexer::IxFDoPurge;
    }
    return confindexer->indexFiles(filenames, indexerFlags);
}

// Delete a list of files. Same comments about call contexts as indexfiles.
bool purgefiles(RclConfig *config, list<string> &filenames)
{
    if (filenames.empty())
        return true;
    makeIndexerOrExit(config, (op_flags & OPT_Z) != 0);
    return confindexer->purgeFiles(filenames, ConfIndexer::IxFNone);
}

// Create stemming and spelling databases
bool createAuxDbs(RclConfig *config)
{
    makeIndexerOrExit(config, false);

    if (!confindexer->createStemmingDatabases())
        return false;

    if (!confindexer->createAspellDict())
        return false;

    return true;
}

// Create additional stem database 
static bool createstemdb(RclConfig *config, const string &lang)
{
    makeIndexerOrExit(config, false);
    return confindexer->createStemDb(lang);
}

// Check that topdir entries are valid (successfull tilde exp + abs
// path) or fail.
// In addition, topdirs, skippedPaths, daemSkippedPaths entries should
// match existing files or directories. Warn if they don't
static bool checktopdirs(RclConfig *config, vector<string>& nonexist)
{
    if (!config->getConfParam("topdirs", &o_topdirs)) {
        cerr << "No 'topdirs' parameter in configuration\n";
        LOGERR("recollindex:No 'topdirs' parameter in configuration\n");
        return false;
    }

    // If a restricted list for real-time monitoring exists check that
    // all entries are descendants from a topdir
    vector<string> mondirs;
    if (config->getConfParam("monitordirs", &mondirs)) {
        for (const auto& sub : mondirs) {
            bool found{false};
            for (const auto& top : o_topdirs) {
                if (path_isdesc(top, sub)) {
                    found = true;
                    break;
                }
            }
            if (!found) {
                string s("Real time monitoring directory entry " + sub +
                         " is not part of the topdirs tree\n");
                cerr << s;
                LOGERR(s);
                return false;
            }
        }
    }
    
    for (auto& dir : o_topdirs) {
        dir = path_tildexpand(dir);
        if (!dir.size() || !path_isabsolute(dir)) {
            if (dir[0] == '~') {
                cerr << "Tilde expansion failed: " << dir << endl;
                LOGERR("recollindex: tilde expansion failed: " << dir << "\n");
            } else {
                cerr << "Not an absolute path: " << dir << endl;
                LOGERR("recollindex: not an absolute path: " << dir << "\n");
            }
            return false;
        }
        if (!path_exists(dir)) {
            nonexist.push_back(dir);
        }
    }
    topdirs_state(o_topdirs_emptiness);

    // We'd like to check skippedPaths too, but these are wildcard
    // exprs, so reasonably can't

    return true;
}


string thisprog;

static const char usage [] =
"\n"
"recollindex [-h] \n"
"    Print help\n"
"recollindex [-z|-Z] [-k]\n"
"    Index everything according to configuration file\n"
"    -z : reset database before starting indexing\n"
"    -Z : in place reset: consider all documents as changed. Can also\n"
"         be combined with -i or -r but not -m\n"
"    -k : retry files on which we previously failed\n"
#ifdef RCL_MONITOR
"recollindex -m [-w <secs>] -x [-D] [-C]\n"
"    Perform real time indexing. Don't become a daemon if -D is set.\n"
"    -w sets number of seconds to wait before starting.\n"
"    -C disables monitoring config for changes/reexecuting.\n"
"    -n disables initial incremental indexing (!and purge!).\n"
#ifndef DISABLE_X11MON
"    -x disables exit on end of x11 session\n"
#endif /* DISABLE_X11MON */
#endif /* RCL_MONITOR */
"recollindex -e [<filepath [path ...]>]\n"
"    Purge data for individual files. No stem database updates.\n"
"    Reads paths on stdin if none is given as argument.\n"
"recollindex -i [-f] [-Z] [<filepath [path ...]>]\n"
"    Index individual files. No database purge or stem database updates\n"
"    Will read paths on stdin if none is given as argument\n"
"    -f : ignore skippedPaths and skippedNames while doing this\n"
"recollindex -r [-K] [-f] [-Z] [-p pattern] <top> \n"
"   Recursive partial reindex. \n"
"     -p : filter file names, multiple instances are allowed, e.g.: \n"
"        -p *.odt -p *.pdf\n"
"     -K : skip previously failed files (they are retried by default)\n"
"recollindex -l\n"
"    List available stemming languages\n"
"recollindex -s <lang>\n"
"    Build stem database for additional language <lang>\n"
"recollindex -E\n"
"    Check configuration file for topdirs and other paths existence\n"
#ifdef FUTURE_IMPROVEMENT
"recollindex -W\n"
"    Process the Web queue\n"
#endif
#ifdef RCL_USE_ASPELL
"recollindex -S\n"
"    Build aspell spelling dictionary.>\n"
#endif
"Common options:\n"
"    -c <configdir> : specify config directory, overriding $RECOLL_CONFDIR\n"
;

static void Usage()
{
    FILE *fp = (op_flags & OPT_h) ? stdout : stderr;
    fprintf(fp, "%s: Usage: %s", path_getsimple(thisprog).c_str(), usage);
    fprintf(fp, "Recoll version: %s\n", Rcl::version_string().c_str());
    exit((op_flags & OPT_h)==0);
}

static RclConfig *config;

static void lockorexit(Pidfile *pidfile, RclConfig *config)
{
    PRETEND_USE(config);
    pid_t pid;
    if ((pid = pidfile->open()) != 0) {
        if (pid > 0) {
            cerr << "Can't become exclusive indexer: " << pidfile->getreason()
                 << ". Return (other pid?): " << pid << endl;
#ifndef _WIN32
            // Have a look at the status file. If the other process is
            // a monitor we can tell it to start an incremental pass
            // by touching the configuration file
            DbIxStatus status;
            readIdxStatus(config, status);
            if (status.hasmonitor) {
                string cmd("touch ");
                string path = path_cat(config->getConfDir(), "recoll.conf");
                cmd += path;
                int status;
                if ((status = system(cmd.c_str()))) {
                    cerr << cmd << " failed with status " << status << endl;
                } else {
                    cerr << "Monitoring indexer process was notified of "
                        "indexing request\n";
                }
            }
#endif
        } else {
            cerr << "Can't become exclusive indexer: " << pidfile->getreason()
                 << endl;
        }            
        exit(1);
    }
    if (pidfile->write_pid() != 0) {
        cerr << "Can't become exclusive indexer: " << pidfile->getreason() <<
            endl;
        exit(1);
    }
}

static string reasonsfile;
extern ConfSimple idxreasons;
static void flushIdxReasons()
{
    if (reasonsfile.empty())
        return;
    if (reasonsfile == "stdout") {
        idxreasons.write(cout);
    } else if (reasonsfile == "stderr") {
        idxreasons.write(std::cerr);
    } else {
        ofstream out;
        try {
            out.open(reasonsfile, ofstream::out|ofstream::trunc);
            idxreasons.write(out);
        } catch (...) {
            cerr << "Could not write reasons file " << reasonsfile << endl;
            idxreasons.write(cerr);
        }
    }
}

static vector<string> argstovector(int argc, char **argv)
{
	vector<string> args;
	for (int i = 0; i < argc; i++) {
		args.push_back(argv[i]);
	}
	return args;
}
static vector<string> fileToArgs(const string& fn)
{
	string reason, data;
	if (!file_to_string(fn, data, &reason)) {
		cerr << "Failed reading args file " << fn << " errno " << errno << "\n";
		exit(1);
	}
	vector<string> args;
	stringToStrings(data, args);
	return args;
}

int main(int argc, char **argv)
{
    string a_config;
    int sleepsecs = 60;
    vector<string> selpatterns;
    
    // The reexec struct is used by the daemon to shed memory after
    // the initial indexing pass and to restart when the configuration
    // changes
#ifndef _WIN32
    o_reexec = new ReExec;
    o_reexec->init(argc, argv);
#endif

    thisprog = path_absolute(argv[0]);
    argc--; argv++;

	vector<string> args = argstovector(argc, argv);

	// Passing args through a temp file: this is used on Windows to
	// avoid issues with charsets in args (avoid using wmain)
	if (args.size() == 1 && args[0][0] != '-') {
		args = fileToArgs(args[0]);
	}

	unsigned int aremain = args.size();
	unsigned int argidx = 0;
	for (; argidx < args.size(); argidx++) {
		const string& arg{args[argidx]};
		aremain = args.size() - argidx;
		if (arg[0] != '-') {
			break;
		}
		for (unsigned int cidx = 1; cidx < arg.size(); cidx++) {
            switch (arg[cidx]) {
            case 'b': op_flags |= OPT_b; break;
            case 'c':   op_flags |= OPT_c; if (aremain < 2)  Usage();
                a_config = args[argidx+1]; argidx++; goto b1;
#ifdef RCL_MONITOR
            case 'C': op_flags |= OPT_C; break;
            case 'D': op_flags |= OPT_D; break;
#endif
            case 'E': op_flags |= OPT_E; break;
            case 'e': op_flags |= OPT_e; break;
            case 'f': op_flags |= OPT_f; break;
            case 'h': op_flags |= OPT_h; break;
            case 'i': op_flags |= OPT_i; break;
            case 'k': op_flags |= OPT_k; break;
            case 'K': op_flags |= OPT_K; break;
            case 'l': op_flags |= OPT_l; break;
            case 'm': op_flags |= OPT_m; break;
            case 'n': op_flags |= OPT_n; break;
            case 'P': op_flags |= OPT_P; break;
            case 'p': op_flags |= OPT_p; if (aremain < 2)  Usage();
                selpatterns.push_back(args[argidx+1]); argidx++; goto b1;
            case 'r': op_flags |= OPT_r; break;
            case 'R':   op_flags |= OPT_R; if (aremain < 2)  Usage();
                reasonsfile = args[argidx+1]; argidx++; goto b1;
            case 's': op_flags |= OPT_s; break;
#ifdef RCL_USE_ASPELL
            case 'S': op_flags |= OPT_S; break;
#endif
            case 'w':   op_flags |= OPT_w; if (aremain < 2)  Usage();
                if ((sscanf(args[argidx+1].c_str(), "%d", &sleepsecs)) != 1) 
                    Usage(); 
                argidx++; goto b1;
            case 'x': op_flags |= OPT_x; break;
            case 'Z': op_flags |= OPT_Z; break;
            case 'z': op_flags |= OPT_z; break;
            default: Usage(); break;
            }
		}
	b1:
		;
	}
    aremain = args.size() - argidx;

    if (op_flags & OPT_h)
        Usage();
#ifndef RCL_MONITOR
    if (op_flags & (OPT_m | OPT_w|OPT_x)) {
        cerr << "Sorry, -m not available: real-time monitoring was not "
            "configured in this build\n";
        exit(1);
    }
#endif

    if ((op_flags & OPT_z) && (op_flags & (OPT_i|OPT_e|OPT_r)))
        Usage();
    if ((op_flags & OPT_Z) && (op_flags & (OPT_m)))
        Usage();
    if ((op_flags & OPT_E) && (op_flags & ~(OPT_E|OPT_c))) {
        Usage();
    }

    string reason;
    int flags = RCLINIT_IDX;
    if ((op_flags & OPT_m) && !(op_flags&OPT_D)) {
        flags |= RCLINIT_DAEMON;
    }
    config = recollinit(flags, cleanup, sigcleanup, reason, &a_config);
    if (config == 0 || !config->ok()) {
        addIdxReason("init", reason);
        flushIdxReasons();
        cerr << "Configuration problem: " << reason << endl;
        exit(1);
    }
#ifndef _WIN32
    o_reexec->atexit(cleanup);
#endif

    vector<string> nonexist;
    if (!checktopdirs(config, nonexist)) {
        addIdxReason("init", "topdirs not set");
        flushIdxReasons();
        exit(1);
    }

    if (nonexist.size()) {
        ostream& out = (op_flags & OPT_E) ? cout : cerr;
        if (!(op_flags & OPT_E)) {
            cerr << "Warning: invalid paths in topdirs, skippedPaths or "
                "daemSkippedPaths:\n";
        }
        for (vector<string>::const_iterator it = nonexist.begin(); 
             it != nonexist.end(); it++) {
            out << *it << endl;
        }
    }
    if ((op_flags & OPT_E)) {
        exit(0);
    }

    string rundir;
    config->getConfParam("idxrundir", rundir);
    if (!rundir.compare("tmp")) {
        LOGINFO("recollindex: changing current directory to [" <<
                tmplocation() << "]\n");
        if (chdir(tmplocation().c_str()) < 0) {
            LOGERR("chdir(" << tmplocation() << ") failed, errno " << errno <<
                   "\n");
        }
    } else if (!rundir.empty()) {
        LOGINFO("recollindex: changing current directory to [" << rundir <<
                "]\n");
        if (chdir(rundir.c_str()) < 0) {
            LOGERR("chdir(" << rundir << ") failed, errno " << errno << "\n");
        }
    }

    bool rezero((op_flags & OPT_z) != 0);
    bool inPlaceReset((op_flags & OPT_Z) != 0);

    // The default is not to retry previously failed files by default.
    // If -k is set, we do.
    // If the checker script says so, we do too, except if -K is set.
    int indexerFlags = ConfIndexer::IxFNoRetryFailed;
    if (op_flags & OPT_k) {
        indexerFlags &= ~ConfIndexer::IxFNoRetryFailed; 
    } else {
        if (op_flags & OPT_K) {
            indexerFlags |= ConfIndexer::IxFNoRetryFailed;
        } else {
            if (checkRetryFailed(config, false)) {
                indexerFlags &= ~ConfIndexer::IxFNoRetryFailed; 
            } else {
                indexerFlags |= ConfIndexer::IxFNoRetryFailed;
            }
        }
    }
    if (indexerFlags & ConfIndexer::IxFNoRetryFailed) {
        LOGDEB("recollindex: files in error will not be retried\n");
    } else {
        LOGDEB("recollindex: files in error will be retried\n");
    }

    Pidfile pidfile(config->getPidfile());
    updater = new MyUpdater(config);

    // Log something at LOGINFO to reset the trace file. Else at level
    // 3 it's not even truncated if all docs are up to date.
    LOGINFO("recollindex: starting up\n");
    setMyPriority(config);
    
    if (op_flags & OPT_r) {
        if (aremain != 1) 
            Usage();
        string top = args[argidx++]; aremain--;
        bool status = recursive_index(config, top, selpatterns);
        if (confindexer && !confindexer->getReason().empty()) {
            addIdxReason("indexer", confindexer->getReason());
            cerr << confindexer->getReason() << endl;
        }
        flushIdxReasons();
        exit(status ? 0 : 1);
    } else if (op_flags & (OPT_i|OPT_e)) {
        lockorexit(&pidfile, config);

        list<string> filenames;
        if (aremain == 0) {
            // Read from stdin
            char line[1024];
            while (fgets(line, 1023, stdin)) {
                string sl(line);
                trimstring(sl, "\n\r");
                filenames.push_back(sl);
            }
        } else {
            while (aremain--) {
                filenames.push_back(args[argidx++]);
            }
        }

        // Note that -e and -i may be both set. In this case we first erase,
        // then index. This is a slightly different from -Z -i because we 
        // warranty that all subdocs are purged.
        bool status = true;
        if (op_flags & OPT_e) {
            status = purgefiles(config, filenames);
        }
        if (status && (op_flags & OPT_i)) {
            status = indexfiles(config, filenames);
        }
        if (confindexer && !confindexer->getReason().empty()) {
            addIdxReason("indexer", confindexer->getReason());
            cerr << confindexer->getReason() << endl;
        }
        flushIdxReasons();
        exit(status ? 0 : 1);
    } else if (op_flags & OPT_l) {
        if (aremain != 0) 
            Usage();
        vector<string> stemmers = ConfIndexer::getStemmerNames();
        for (vector<string>::const_iterator it = stemmers.begin(); 
             it != stemmers.end(); it++) {
            cout << *it << endl;
        }
        exit(0);
    } else if (op_flags & OPT_s) {
        if (aremain != 1) 
            Usage();
        string lang = args[argidx++]; aremain--;
        exit(!createstemdb(config, lang));
#ifdef RCL_USE_ASPELL
    } else if (op_flags & OPT_S) {
        makeIndexerOrExit(config, false);
        exit(!confindexer->createAspellDict());
#endif // ASPELL

#ifdef RCL_MONITOR
    } else if (op_flags & OPT_m) {
        if (aremain != 0) 
            Usage();
        lockorexit(&pidfile, config);
        if (updater) {
            updater->status.hasmonitor = true;
        }
        if (!(op_flags&OPT_D)) {
            LOGDEB("recollindex: daemonizing\n");
#ifndef _WIN32
            if (daemon(0,0) != 0) {
                addIdxReason("monitor", "daemon() failed");
                cerr << "daemon() failed, errno " << errno << endl;
                LOGERR("daemon() failed, errno " << errno << "\n");
                flushIdxReasons();
                exit(1);
            }
#endif
        }
        // Need to rewrite pid, it changed
        pidfile.write_pid();
        // Not too sure if I have to redo the nice thing after daemon(),
        // can't hurt anyway (easier than testing on all platforms...)
        setMyPriority(config);

        if (sleepsecs > 0) {
            LOGDEB("recollindex: sleeping " << sleepsecs << "\n");
            for (int i = 0; i < sleepsecs; i++) {
                sleep(1);
                // Check that x11 did not go away while we were sleeping.
                if (!(op_flags & OPT_x) && !x11IsAlive()) {
                    LOGDEB("X11 session went away during initial sleep period\n");
                    exit(0);
                }
            }
        }

        if (!(op_flags & OPT_n)) {
            makeIndexerOrExit(config, inPlaceReset);
            LOGDEB("Recollindex: initial indexing pass before monitoring\n");
            if (!confindexer->index(rezero, ConfIndexer::IxTAll, indexerFlags)
                || stopindexing) {
                LOGERR("recollindex, initial indexing pass failed, "
                       "not going into monitor mode\n");
                flushIdxReasons();
                exit(1);
            } else {
                // Record success of indexing pass with failed files retries.
                if (!(indexerFlags & ConfIndexer::IxFNoRetryFailed)) {
                    checkRetryFailed(config, true);
                }
            }
            deleteZ(confindexer);
#ifndef _WIN32
            o_reexec->insertArgs(vector<string>(1, "-n"));
            LOGINFO("recollindex: reexecuting with -n after initial full "
                    "pass\n");
            // Note that -n will be inside the reexec when we come
            // back, but the monitor will explicitly strip it before
            // starting a config change exec to ensure that we do a
            // purging pass in this latter case (full restart).
            o_reexec->reexec();
#endif
        }

        if (updater) {
            updater->status.phase = DbIxStatus::DBIXS_MONITOR;
            updater->status.fn.clear();
            updater->update();
        }
        int opts = RCLMON_NONE;
        if (op_flags & OPT_D)
            opts |= RCLMON_NOFORK;
        if (op_flags & OPT_C)
            opts |= RCLMON_NOCONFCHECK;
        if (op_flags & OPT_x)
            opts |= RCLMON_NOX11;
        bool monret = startMonitor(config, opts);
        MONDEB(("Monitor returned %d, exiting\n", monret));
        exit(monret == false);
#endif // MONITOR

    } else if (op_flags & OPT_b) {
        cerr << "Not yet" << endl;
        return 1;
    } else {
        lockorexit(&pidfile, config);
        makeIndexerOrExit(config, inPlaceReset);
        bool status = confindexer->index(rezero, ConfIndexer::IxTAll, 
                                         indexerFlags);
        // Record success of indexing pass with failed files retries.
        if (status && !(indexerFlags & ConfIndexer::IxFNoRetryFailed)) {
            checkRetryFailed(config, true);
        }
        if (!status) 
            cerr << "Indexing failed" << endl;
        if (!confindexer->getReason().empty()) {
            addIdxReason("indexer", confindexer->getReason());
            cerr << confindexer->getReason() << endl;
        }
        if (updater) {
            updater->status.phase = DbIxStatus::DBIXS_DONE;
            updater->status.fn.clear();
            updater->update();
        }
        flushIdxReasons();
        return !status;
    }
}