1 files changed, 188 insertions, 0 deletions
diff --git a/tdesu/process.h b/tdesu/process.h
new file mode 100644
index 000000000..ec3af9a62
--- /dev/null
+++ b/tdesu/process.h
@@ -0,0 +1,188 @@
+/* vi: ts=8 sts=4 sw=4
+ *
+ * $Id$
+ *
+ * This file is part of the KDE project, module tdesu.
+ * Copyright (C) 1999,2000 Geert Jansen <jansen@kde.org>
+ * 
+ * This is free software; you can use this library under the GNU Library 
+ * General Public License, version 2. See the file "COPYING.LIB" for the 
+ * exact licensing terms.
+ */
+
+#ifndef __Process_h_Included__
+#define __Process_h_Included__
+
+#include <sys/types.h>
+
+#include <tqcstring.h>
+#include <tqstring.h>
+#include <tqstringlist.h>
+#include <tqvaluelist.h>
+
+#include <kdelibs_export.h>
+
+class PTY;
+typedef TQValueList<TQCString> QCStringList;
+
+/**
+ * Synchronous communication with tty programs.
+ *
+ * PtyProcess provides synchronous communication with tty based programs. 
+ * The communications channel used is a pseudo tty (as opposed to a pipe) 
+ * This means that programs which require a terminal will work.
+ */
+
+class KDESU_EXPORT PtyProcess
+{
+public:
+    PtyProcess();
+    virtual ~PtyProcess();
+
+    /**
+     * Forks off and execute a command. The command's standard in and output 
+     * are connected to the pseudo tty. They are accessible with readLine 
+     * and writeLine.
+     * @param command The command to execute.
+     * @param args The arguments to the command.
+     */
+    int exec(const TQCString &command, const QCStringList &args);
+
+    /**
+     * Reads a line from the program's standard out. Depending on the @em block 
+     * parameter, this call blocks until a single, full line is read. 
+     * @param block Block until a full line is read?
+     * @return The output string.
+     */
+    TQCString readLine(bool block=true);
+    /**
+     * Read all available output from the program's standard out.
+     * @param block If no output is in the buffer, should the function block
+     * @return The output.
+     */
+    TQCString readAll(bool block=true);
+
+    /**
+     * Writes a line of text to the program's standard in.
+     * @param line The text to write.
+     * @param addNewline Adds a '\n' to the line.
+     */
+    void writeLine(const TQCString &line, bool addNewline=true);
+
+    /**
+     * Puts back a line of input.
+     * @param line The line to put back.
+     * @param addNewline Adds a '\n' to the line.
+     */
+    void unreadLine(const TQCString &line, bool addNewline=true);
+
+    /**
+     * Sets the exit string. If a line of program output matches this,
+     * waitForChild() will terminate the program and return.
+     */
+    void setExitString(const TQCString &exit) { m_Exit = exit; }
+
+    /**
+     * Waits for the child to exit. See also setExitString.
+     */
+    int waitForChild();
+
+    /**
+     * Waits until the pty has cleared the ECHO flag. This is useful 
+     * when programs write a password prompt before they disable ECHO.
+     * Disabling it might flush any input that was written.
+     */
+    int WaitSlave();
+
+    /**
+     * Enables/disables local echo on the pseudo tty.
+     */
+    int enableLocalEcho(bool enable=true);
+
+    /**
+     * Enables/disables terminal output. Relevant only to some subclasses.
+     */
+    void setTerminal(bool terminal) { m_bTerminal = terminal; }
+
+    /**
+     * Overwrites the password as soon as it is used. Relevant only to
+     * some subclasses.
+     */
+    void setErase(bool erase) { m_bErase = erase; }
+
+    /**
+     * Set additinal environment variables.
+     */
+    void setEnvironment( const QCStringList &env );
+
+    /**
+     * Returns the filedescriptor of the process.
+     */
+    int fd() {return m_Fd;}
+
+    /**
+     * Returns the pid of the process.
+     */
+    int pid() {return m_Pid;}
+
+public: /* static */
+    /*
+    ** This is a collection of static functions that can be
+    ** used for process control inside tdesu. I'd suggest 
+    ** against using this publicly. There are probably 
+    ** nicer Qt based ways to do what you want.
+    */
+
+    /**
+    ** Wait @p ms miliseconds (ie. 1/10th of a second is 100ms),
+    ** using @p fd as a filedescriptor to wait on. Returns
+    ** select(2)'s result, which is -1 on error, 0 on timeout,
+    ** or positive if there is data on one of the selected fd's.
+    **
+    ** @p ms must be in the range 0..999 (ie. the maximum wait
+    ** duration is 999ms, almost one second).
+    */
+    static int waitMS(int fd,int ms);
+
+
+    /**
+    ** Basic check for the existence of @p pid.
+    ** Returns true iff @p pid is an extant process,
+    ** (one you could kill - see man kill(2) for signal 0).
+    */
+    static bool checkPid(pid_t pid);
+
+    /**
+    ** Check process exit status for process @p pid.
+    ** On error (no child, no exit), return -1.
+    ** If child @p pid has exited, return its exit status,
+    ** (which may be zero).
+    ** If child @p has not exited, return -2.
+    */
+    enum checkPidStatus { Error=-1, NotExited=-2, Killed=-3 } ;
+    static int checkPidExited(pid_t pid);
+
+
+protected:
+    const QCStringList& environment() const;
+
+    bool m_bErase, m_bTerminal;
+    int m_Pid, m_Fd;
+    TQCString m_Command, m_Exit;
+
+private:
+    int init();
+    int SetupTTY(int fd);
+
+    PTY *m_pPTY;
+    TQCString m_Inbuf, m_TTY;
+
+protected:
+    virtual void virtual_hook( int id, void* data );
+private:
+    class PtyProcessPrivate;
+    PtyProcessPrivate *d;
+};
+
+
+#endif