151 lines
4.1 KiB
C++
151 lines
4.1 KiB
C++
/* Copyright (C) 2004-2021 J.F.Dockes
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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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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "autoconfig.h"
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#include <stdio.h>
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#include "ecrontab.h"
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#include "execmd.h"
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#include "smallut.h"
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#include "log.h"
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// Read crontab file and split it into lines.
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static bool eCrontabGetLines(vector<string>& lines)
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{
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string crontab;
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ExecCmd croncmd;
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vector<string> args;
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int status;
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// Retrieve current crontab contents. An error here means that no
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// crontab exists, and is not fatal, but we return a different
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// status than for an empty one
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args.push_back("-l");
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if ((status = croncmd.doexec("crontab", args, 0, &crontab))) {
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lines.clear();
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return false;
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}
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// Split crontab into lines
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stringToTokens(crontab, lines, "\n");
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return true;
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}
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// Concatenate lines and write crontab
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static bool eCrontabWriteFile(const vector<string>& lines, string& reason)
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{
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string crontab;
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ExecCmd croncmd;
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vector<string> args;
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int status;
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for (const auto& line : lines) {
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crontab += line + "\n";
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}
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args.push_back("-");
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if ((status = croncmd.doexec("crontab", args, &crontab, 0))) {
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char nbuf[30];
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sprintf(nbuf, "0x%x", status);
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reason = string("Exec crontab -l failed: status: ") + nbuf;
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return false;
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}
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return true;
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}
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// Add / change / delete entry identified by marker and id
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bool editCrontab(const string& marker, const string& id,
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const string& sched, const string& cmd, string& reason)
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{
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vector<string> lines;
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if (!eCrontabGetLines(lines)) {
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// Special case: cmd is empty, no crontab, don't create one
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if (cmd.empty())
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return true;
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}
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// Remove old copy if any
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for (auto it = lines.begin(); it != lines.end(); it++) {
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// Skip comment
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if (it->find_first_of("#") == it->find_first_not_of(" \t"))
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continue;
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if (it->find(marker) != string::npos && it->find(id) != string::npos) {
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lines.erase(it);
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break;
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}
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}
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if (!cmd.empty()) {
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string nline = sched + " " + marker + " " + id + " " + cmd;
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lines.push_back(nline);
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}
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if (!eCrontabWriteFile(lines, reason))
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return false;
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return true;
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}
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bool checkCrontabUnmanaged(const string& marker, const string& data)
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{
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vector<string> lines;
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if (!eCrontabGetLines(lines)) {
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// No crontab, answer is no
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return false;
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}
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// Scan crontab
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for (const auto& line : lines) {
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if (line.find(marker) == string::npos &&
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line.find(data) != string::npos) {
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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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/** Retrieve the scheduling for a crontab entry */
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bool getCrontabSched(const string& marker, const string& id,
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vector<string>& sched)
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{
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LOGDEB0("getCrontabSched: marker[" << marker << "], id[" << id << "]\n");
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vector<string> lines;
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if (!eCrontabGetLines(lines)) {
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// No crontab, answer is no
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sched.clear();
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return false;
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}
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string theline;
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for (const auto& line : lines) {
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// Skip comment
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if (line.find_first_of("#") == line.find_first_not_of(" \t"))
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continue;
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if (line.find(marker) != string::npos &&
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line.find(id) != string::npos) {
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theline = line;
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break;
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}
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}
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stringToTokens(theline, sched);
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sched.resize(5);
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return true;
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}
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