1 files changed, 333 insertions, 0 deletions
diff --git a/kcron/ctcron.cpp b/kcron/ctcron.cpp
new file mode 100644
index 0000000..853f6de
--- /dev/null
+++ b/kcron/ctcron.cpp
@@ -0,0 +1,333 @@
+/***************************************************************************
+ *   CT Cron Implementation                                                *
+ *   --------------------------------------------------------------------  *
+ *   Copyright (C) 1999, Gary Meyer <gary@meyer.net>                       *
+ *   --------------------------------------------------------------------  *
+ *   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.                                   *
+ ***************************************************************************/
+
+// Do not introduce any Qt or KDE dependencies into the "CT"-prefixed classes.
+// I want to be able to reuse these classes with another GUI toolkit. -GM 11/99
+
+#include "ctcron.h"
+
+#include "cti18n.h"
+#include "cttask.h"
+#include "ctvariable.h"
+#include <unistd.h>      // getuid(), unlink()
+#include <pwd.h>         // pwd, getpwnam(), getpwuid()
+#include <stdio.h>
+#include <assert.h>
+
+#include <qfile.h>
+
+#include <kprocess.h>
+#include <klocale.h>
+#include <ktempfile.h>
+
+#include <iostream>
+
+using namespace std;
+
+CTCron::CTCron(bool _syscron, string _login) :
+  syscron(_syscron)
+{
+  int uid(getuid());
+
+  KTempFile tmp;
+  tmp.setAutoDelete(true);
+  tmp.close();
+  tmpFileName = tmp.name();  
+
+  QString readCommand;
+
+  if (uid == 0)
+  // root, so provide requested crontab
+  {
+    if (syscron)
+    {
+      readCommand  = "cat /etc/crontab > " + KProcess::quote(tmpFileName);
+      writeCommand = "cat " + KProcess::quote(tmpFileName) + " > /etc/crontab";
+      login = (const char *)i18n("(System Crontab)").local8Bit();
+      name = "";
+    }
+    else
+    {
+      readCommand  = QString("crontab -u ") + _login.c_str() + " -l > " + KProcess::quote(tmpFileName);
+      writeCommand = QString("crontab -u ") + _login.c_str() + " " + KProcess::quote(tmpFileName);
+      if (!initFromPasswd(getpwnam(_login.c_str())))
+      {
+         error = i18n("No password entry found for user '%1'").arg(_login.c_str());
+      }
+    }
+  }
+  else
+  // regular user, so provide user's own crontab
+  {
+    readCommand  = "crontab -l > " + KProcess::quote(tmpFileName);
+    writeCommand = "crontab "      + KProcess::quote(tmpFileName);
+    if (!initFromPasswd(getpwuid(uid)))
+    {
+      error = i18n("No password entry found for uid '%1'").arg(uid);
+    }
+  }
+
+  if (name.empty())
+    name = login;
+
+  initialTaskCount      = 0;
+  initialVariableCount  = 0;
+  
+  if (isError())
+     return;
+
+  // Don't set error if it can't be read, it means the user
+  // doesn't have a crontab.
+  if (system(QFile::encodeName(readCommand)) == 0)
+  {
+    ifstream cronfile(QFile::encodeName(tmpFileName));
+    cronfile >> *this;
+  }
+
+  initialTaskCount      = task.size();
+  initialVariableCount  = variable.size();
+}
+
+CTCron::CTCron(const struct passwd *pwd) :
+  syscron(false)
+{
+  Q_ASSERT(pwd != 0L);
+
+  KTempFile tmp;
+  tmp.setAutoDelete(true);
+  tmp.close();
+  tmpFileName = tmp.name();  
+
+  QString readCommand  = QString("crontab -u ") + QString(pwd->pw_name) + " -l > " + KProcess::quote(tmpFileName);
+  writeCommand = QString("crontab -u ") + QString(pwd->pw_name) + " " + KProcess::quote(tmpFileName);
+
+  initFromPasswd(pwd);
+
+  initialTaskCount      = 0;
+  initialVariableCount  = 0;
+  
+  if (isError())
+     return;
+
+  // Don't set error if it can't be read, it means the user
+  // doesn't have a crontab.
+  if (system(QFile::encodeName(readCommand)) == 0)
+  {
+    ifstream cronfile(QFile::encodeName(tmpFileName));
+    cronfile >> *this;
+  }
+
+  initialTaskCount      = task.size();
+  initialVariableCount  = variable.size();
+}
+
+bool CTCron::initFromPasswd(const struct passwd *pwd)
+{
+   if (pwd == 0)
+   {
+      return false;
+   }
+   else
+   {
+      login = pwd->pw_name;
+      name = pwd->pw_gecos;
+      return true;
+   }
+}
+
+void CTCron::operator = (const CTCron& source)
+{
+  assert(!source.syscron);
+
+  for (CTVariableIterator i = const_cast<CTCron&>(source).variable.begin();
+    i != source.variable.end(); ++i)
+  {
+    CTVariable* tmp = new CTVariable(**i);
+    variable.push_back(tmp);
+  }
+
+  for (CTTaskIterator i = const_cast<CTCron&>(source).task.begin();
+    i != source.task.end(); ++i)
+  {
+    CTTask* tmp = new CTTask(**i);
+    task.push_back(tmp);
+  }
+}
+
+istream& operator >> (istream& inputStream, CTCron& cron)
+{
+  const int MAX = 1024;
+  char buffer[MAX];
+  string line("");
+  string comment("");
+
+  while (inputStream)
+  {
+    inputStream.getline(buffer, MAX);
+    line = buffer;
+
+    // search for comments "#" but not disabled tasks "#\"
+    if ((line.find("#") == 0) && (line.find("\\") != 1))
+    {
+      // If the first 10 characters don't contain a character, it's probably a disabled entry.
+      int first_text = line.find_first_of("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ");
+      if (first_text < 0)
+         continue;
+
+      if (first_text < 10) 
+      {
+         // remove leading pound sign
+         line = line.substr(1,line.length()-1);
+         // remove leading whitespace
+         while (line.find_first_of(" \t") == 0)
+            line = line.substr(1,line.length()-1);
+         comment = line;
+         continue;
+      }
+    }
+
+    // else
+    {
+      // either a task or a variable
+      int firstWhiteSpace(line.find_first_of(" \t"));
+      int firstEquals(line.find("="));
+
+      // if there is an equals sign and either there is no
+      // whitespace or the first whitespace is after the equals
+      // sign, it must be a variable
+      if ((firstEquals > 0) && ((firstWhiteSpace == -1) ||
+        firstWhiteSpace > firstEquals))
+      {
+        // create variable
+        CTVariable *tmp = new CTVariable(line, comment);
+        cron.variable.push_back(tmp);
+        comment = "";
+      }
+      else
+      // must be a task, either enabled or disabled
+      {
+        if (firstWhiteSpace > 0)
+        {
+          CTTask *tmp = new CTTask(line, comment, cron.syscron);
+          cron.task.push_back(tmp);
+          comment = "";
+        }
+      }
+    }
+  }
+  return inputStream;
+}
+
+ostream& operator << (ostream& outputStream, const CTCron& cron)
+{
+  int itemCount(0);
+
+  for (CTVariableIterator i = const_cast<CTCron&>(cron).variable.begin();
+    i != cron.variable.end(); ++i)
+  {
+    outputStream << **i;
+    itemCount++;
+  }
+
+  for (CTTaskIterator i = const_cast<CTCron&>(cron).task.begin();
+    i != cron.task.end(); ++i)
+  {
+    outputStream << **i;
+    itemCount++;
+  }
+
+  if (itemCount > 0)
+  {
+    outputStream << "# This file was written by KCron. Copyright (c) 1999, Gary Meyer\n";
+    outputStream << "# Although KCron supports most crontab formats, use care when editing.\n";
+    outputStream << "# Note: Lines beginning with \"#\\\" indicates a disabled task.\n";
+  }
+
+  return outputStream;
+}
+
+CTCron::~CTCron()
+{
+  for (CTTaskIterator i = task.begin(); i != task.end(); ++i)
+    delete *i;
+  for (CTVariableIterator i = variable.begin(); i != variable.end(); ++i)
+    delete *i;
+}
+
+void CTCron::apply()
+{
+  // write to temp file
+  ofstream cronfile(QFile::encodeName(tmpFileName));
+  cronfile << *this << flush;
+
+  // install temp file into crontab
+  if (system(QFile::encodeName(writeCommand)) != 0)
+  {
+    error = i18n("An error occurred while updating crontab.");
+  }
+
+  // remove the temp file
+  (void) unlink(QFile::encodeName(tmpFileName));
+
+  if (isError())
+    return;
+
+  // mark as applied
+  for (CTTaskIterator i = task.begin(); i != task.end(); ++i)
+    (*i)->apply();
+
+  for (CTVariableIterator i = variable.begin(); i != variable.end(); ++i)
+    (*i)->apply();
+
+  initialTaskCount = task.size();
+  initialVariableCount = variable.size();
+}
+
+void CTCron::cancel()
+{
+  for (CTTaskIterator i = task.begin(); i != task.end(); ++i)
+    (*i)->cancel();
+
+  for (CTVariableIterator i = variable.begin(); i != variable.end(); ++i)
+    (*i)->cancel();
+}
+
+bool CTCron::dirty()
+{
+  bool isDirty(false);
+
+  if (initialTaskCount != task.size()) isDirty = true;
+
+  if (initialVariableCount != variable.size()) isDirty = true;
+
+  for (CTTaskIterator i = task.begin(); i != task.end(); ++i)
+    if ((*i)->dirty()) isDirty = true;
+
+  for (CTVariableIterator i = variable.begin(); i != variable.end(); ++i)
+    if ((*i)->dirty()) isDirty = true;
+
+  return isDirty;
+}
+
+string CTCron::path() const
+{
+  string path;
+
+  for (CTVariableIterator var = const_cast<CTCron*>(this)->variable.begin();
+    var != variable.end(); var++)
+  {
+    if ((*var)->variable == "PATH")
+    {
+      path = (*var)->value;
+    }
+  }
+  return path;
+}