author | mickeyl <mickeyl> | 2004-11-16 19:14:18 (UTC) |
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committer | mickeyl <mickeyl> | 2004-11-16 19:14:18 (UTC) |
commit | ea3945a9bd8f9830f70b1efa133f9df13b19362f (patch) (unidiff) | |
tree | f2ea22cc50e9aa8aa73ee7dea148f41c563c9666 /libopie/oprocess.h | |
parent | 1c6f490e8541626f68422e0a3a7c7281d7f5b7d3 (diff) | |
download | opie-ea3945a9bd8f9830f70b1efa133f9df13b19362f.zip opie-ea3945a9bd8f9830f70b1efa133f9df13b19362f.tar.gz opie-ea3945a9bd8f9830f70b1efa133f9df13b19362f.tar.bz2 |
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diff --git a/libopie/oprocess.h b/libopie/oprocess.h deleted file mode 100644 index af7cddb..0000000 --- a/libopie/oprocess.h +++ b/dev/null | |||
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1 | /* This file is part of the KDE libraries | ||
2 | Copyright (C) 1997 Christian Czezakte (e9025461@student.tuwien.ac.at) | ||
3 | |||
4 | This library is free software; you can redistribute it and/or | ||
5 | modify it under the terms of the GNU Library General Public | ||
6 | License as published by the Free Software Foundation; either | ||
7 | version 2 of the License, or (at your option) any later version. | ||
8 | |||
9 | This library is distributed in the hope that it will be useful, | ||
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
12 | Library General Public License for more details. | ||
13 | |||
14 | You should have received a copy of the GNU Library General Public License | ||
15 | along with this library; see the file COPYING.LIB. If not, write to | ||
16 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | ||
17 | Boston, MA 02111-1307, USA. | ||
18 | */ | ||
19 | // | ||
20 | // KPROCESS -- A class for handling child processes in KDE without | ||
21 | // having to take care of Un*x specific implementation details | ||
22 | // | ||
23 | // version 0.3.1, Jan 8th 1998 | ||
24 | // | ||
25 | // (C) Christian Czezatke | ||
26 | // e9025461@student.tuwien.ac.at | ||
27 | // Ported by Holger Freyther to the Open Palmtop Integrated Environment | ||
28 | // | ||
29 | |||
30 | #ifndef __kprocess_h__ | ||
31 | #define __kprocess_h__ | ||
32 | |||
33 | #include <sys/types.h> // for pid_t | ||
34 | #include <sys/wait.h> | ||
35 | #include <signal.h> | ||
36 | #include <unistd.h> | ||
37 | #include <qvaluelist.h> | ||
38 | #include <qcstring.h> | ||
39 | #include <qobject.h> | ||
40 | |||
41 | class QSocketNotifier; | ||
42 | class OProcessPrivate; | ||
43 | |||
44 | /** | ||
45 | * Child process invocation, monitoring and control. | ||
46 | * | ||
47 | * @sect General usage and features | ||
48 | * | ||
49 | *This class allows a KDE and OPIE application to start child processes without having | ||
50 | *to worry about UN*X signal handling issues and zombie process reaping. | ||
51 | * | ||
52 | *@see KProcIO | ||
53 | * | ||
54 | *Basically, this class distinguishes three different ways of running | ||
55 | *child processes: | ||
56 | * | ||
57 | *@li OProcess::DontCare -- The child process is invoked and both the child | ||
58 | *process and the parent process continue concurrently. | ||
59 | * | ||
60 | *Starting a DontCare child process means that the application is | ||
61 | *not interested in any notification to determine whether the | ||
62 | *child process has already exited or not. | ||
63 | * | ||
64 | *@li OProcess::NotifyOnExit -- The child process is invoked and both the | ||
65 | *child and the parent process run concurrently. | ||
66 | * | ||
67 | *When the child process exits, the OProcess instance | ||
68 | *corresponding to it emits the Qt signal @ref processExited(). | ||
69 | * | ||
70 | *Since this signal is @em not emitted from within a UN*X | ||
71 | *signal handler, arbitrary function calls can be made. | ||
72 | * | ||
73 | *Be aware: When the OProcess objects gets destructed, the child | ||
74 | *process will be killed if it is still running! | ||
75 | *This means in particular, that you cannot use a OProcess on the stack | ||
76 | *with OProcess::NotifyOnExit. | ||
77 | * | ||
78 | *@li OProcess::Block -- The child process starts and the parent process | ||
79 | *is suspended until the child process exits. (@em Really not recommended | ||
80 | *for programs with a GUI.) | ||
81 | * | ||
82 | *OProcess also provides several functions for determining the exit status | ||
83 | *and the pid of the child process it represents. | ||
84 | * | ||
85 | *Furthermore it is possible to supply command-line arguments to the process | ||
86 | *in a clean fashion (no null -- terminated stringlists and such...) | ||
87 | * | ||
88 | *A small usage example: | ||
89 | *<pre> | ||
90 | *OProcess *proc = new OProcess; | ||
91 | * | ||
92 | **proc << "my_executable"; | ||
93 | **proc << "These" << "are" << "the" << "command" << "line" << "args"; | ||
94 | *QApplication::connect(proc, SIGNAL(processExited(OProcess *)), | ||
95 | * pointer_to_my_object, SLOT(my_objects_slot(OProcess *))); | ||
96 | *proc->start(); | ||
97 | *</pre> | ||
98 | * | ||
99 | *This will start "my_executable" with the commandline arguments "These"... | ||
100 | * | ||
101 | *When the child process exits, the respective Qt signal will be emitted. | ||
102 | * | ||
103 | *@sect Communication with the child process | ||
104 | * | ||
105 | *OProcess supports communication with the child process through | ||
106 | *stdin/stdout/stderr. | ||
107 | * | ||
108 | *The following functions are provided for getting data from the child | ||
109 | *process or sending data to the child's stdin (For more information, | ||
110 | *have a look at the documentation of each function): | ||
111 | * | ||
112 | *@li bool @ref writeStdin(char *buffer, int buflen); | ||
113 | *@li -- Transmit data to the child process's stdin. | ||
114 | * | ||
115 | *@li bool @ref closeStdin(); | ||
116 | *@li -- Closes the child process's stdin (which causes it to see an feof(stdin)). | ||
117 | *Returns false if you try to close stdin for a process that has been started | ||
118 | *without a communication channel to stdin. | ||
119 | * | ||
120 | *@li bool @ref closeStdout(); | ||
121 | *@li -- Closes the child process's stdout. | ||
122 | *Returns false if you try to close stdout for a process that has been started | ||
123 | *without a communication channel to stdout. | ||
124 | * | ||
125 | *@li bool @ref closeStderr(); | ||
126 | *@li -- Closes the child process's stderr. | ||
127 | *Returns false if you try to close stderr for a process that has been started | ||
128 | *without a communication channel to stderr. | ||
129 | * | ||
130 | * | ||
131 | *@sect QT signals: | ||
132 | * | ||
133 | *@li void @ref receivedStdout(OProcess *proc, char *buffer, int buflen); | ||
134 | *@li void @ref receivedStderr(OProcess *proc, char *buffer, int buflen); | ||
135 | *@li -- Indicates that new data has arrived from either the | ||
136 | *child process's stdout or stderr. | ||
137 | * | ||
138 | *@li void @ref wroteStdin(OProcess *proc); | ||
139 | *@li -- Indicates that all data that has been sent to the child process | ||
140 | *by a prior call to @ref writeStdin() has actually been transmitted to the | ||
141 | *client . | ||
142 | * | ||
143 | *@author Christian Czezakte e9025461@student.tuwien.ac.at | ||
144 | * | ||
145 | * | ||
146 | **/ | ||
147 | class OProcess : public QObject | ||
148 | { | ||
149 | Q_OBJECT | ||
150 | |||
151 | public: | ||
152 | |||
153 | /** | ||
154 | * Modes in which the communication channel can be opened. | ||
155 | * | ||
156 | * If communication for more than one channel is required, | ||
157 | * the values have to be or'ed together, for example to get | ||
158 | * communication with stdout as well as with stdin, you would | ||
159 | * specify @p Stdin @p | @p Stdout | ||
160 | * | ||
161 | * If @p NoRead is specified in conjunction with @p Stdout, | ||
162 | * no data is actually read from @p Stdout but only | ||
163 | * the signal @ref childOutput(int fd) is emitted. | ||
164 | */ | ||
165 | enum Communication { NoCommunication = 0, Stdin = 1, Stdout = 2, Stderr = 4, | ||
166 | AllOutput = 6, All = 7, | ||
167 | NoRead }; | ||
168 | |||
169 | /** | ||
170 | * Run-modes for a child process. | ||
171 | */ | ||
172 | enum RunMode { | ||
173 | /** | ||
174 | * The application does not receive notifications from the subprocess when | ||
175 | * it is finished or aborted. | ||
176 | */ | ||
177 | DontCare, | ||
178 | /** | ||
179 | * The application is notified when the subprocess dies. | ||
180 | */ | ||
181 | NotifyOnExit, | ||
182 | /** | ||
183 | * The application is suspended until the started process is finished. | ||
184 | */ | ||
185 | Block }; | ||
186 | |||
187 | /** | ||
188 | * Constructor | ||
189 | */ | ||
190 | OProcess(QObject *parent = 0, const char *name = 0); | ||
191 | /** | ||
192 | * Constructor | ||
193 | */ | ||
194 | OProcess(const QString &arg0, QObject *parent = 0, const char *name = 0); | ||
195 | /** | ||
196 | * Constructor | ||
197 | */ | ||
198 | OProcess(const QStringList &args, QObject *parent = 0, const char *name = 0); | ||
199 | |||
200 | /** | ||
201 | *Destructor: | ||
202 | * | ||
203 | * If the process is running when the destructor for this class | ||
204 | * is called, the child process is killed with a SIGKILL, but | ||
205 | * only if the run mode is not of type @p DontCare. | ||
206 | * Processes started as @p DontCare keep running anyway. | ||
207 | */ | ||
208 | virtual ~OProcess(); | ||
209 | |||
210 | /** | ||
211 | @deprecated | ||
212 | |||
213 | The use of this function is now deprecated. -- Please use the | ||
214 | "operator<<" instead of "setExecutable". | ||
215 | |||
216 | Sets the executable to be started with this OProcess object. | ||
217 | Returns false if the process is currently running (in that | ||
218 | case the executable remains unchanged.) | ||
219 | |||
220 | @see operator<< | ||
221 | |||
222 | */ | ||
223 | bool setExecutable(const QString& proc); | ||
224 | |||
225 | |||
226 | /** | ||
227 | * Sets the executable and the command line argument list for this process. | ||
228 | * | ||
229 | * For example, doing an "ls -l /usr/local/bin" can be achieved by: | ||
230 | * <pre> | ||
231 | * OProcess p; | ||
232 | * ... | ||
233 | * p << "ls" << "-l" << "/usr/local/bin" | ||
234 | * </pre> | ||
235 | * | ||
236 | **/ | ||
237 | OProcess &operator<<(const QString& arg); | ||
238 | /** | ||
239 | * Similar to previous method, takes a char *, supposed to be in locale 8 bit already. | ||
240 | */ | ||
241 | OProcess &operator<<(const char * arg); | ||
242 | /** | ||
243 | * Similar to previous method, takes a QCString, supposed to be in locale 8 bit already. | ||
244 | */ | ||
245 | OProcess &operator<<(const QCString & arg); | ||
246 | |||
247 | /** | ||
248 | * Sets the executable and the command line argument list for this process, | ||
249 | * in a single method call, or add a list of arguments. | ||
250 | **/ | ||
251 | OProcess &operator<<(const QStringList& args); | ||
252 | |||
253 | /** | ||
254 | * Clear a command line argument list that has been set by using | ||
255 | * the "operator<<". | ||
256 | */ | ||
257 | void clearArguments(); | ||
258 | |||
259 | /** | ||
260 | * Starts the process. | ||
261 | * For a detailed description of the | ||
262 | * various run modes and communication semantics, have a look at the | ||
263 | * general description of the OProcess class. | ||
264 | * | ||
265 | * The following problems could cause this function to | ||
266 | * return false: | ||
267 | * | ||
268 | * @li The process is already running. | ||
269 | * @li The command line argument list is empty. | ||
270 | * @li The starting of the process failed (could not fork). | ||
271 | * @li The executable was not found. | ||
272 | * | ||
273 | * @param comm Specifies which communication links should be | ||
274 | * established to the child process (stdin/stdout/stderr). By default, | ||
275 | * no communication takes place and the respective communication | ||
276 | * signals will never get emitted. | ||
277 | * | ||
278 | * @return true on success, false on error | ||
279 | * (see above for error conditions) | ||
280 | **/ | ||
281 | virtual bool start(RunMode runmode = NotifyOnExit, | ||
282 | Communication comm = NoCommunication); | ||
283 | |||
284 | /** | ||
285 | * Stop the process (by sending it a signal). | ||
286 | * | ||
287 | * @param signoThe signal to send. The default is SIGTERM. | ||
288 | * @return @p true if the signal was delivered successfully. | ||
289 | */ | ||
290 | virtual bool kill(int signo = SIGTERM); | ||
291 | |||
292 | /** | ||
293 | @return @p true if the process is (still) considered to be running | ||
294 | */ | ||
295 | bool isRunning() const; | ||
296 | |||
297 | /** Returns the process id of the process. | ||
298 | * | ||
299 | * If it is called after | ||
300 | * the process has exited, it returns the process id of the last | ||
301 | * child process that was created by this instance of OProcess. | ||
302 | * | ||
303 | * Calling it before any child process has been started by this | ||
304 | * OProcess instance causes pid() to return 0. | ||
305 | **/ | ||
306 | pid_t pid() const; | ||
307 | |||
308 | /** | ||
309 | * Suspend processing of data from stdout of the child process. | ||
310 | */ | ||
311 | void suspend(); | ||
312 | |||
313 | /** | ||
314 | * Resume processing of data from stdout of the child process. | ||
315 | */ | ||
316 | void resume(); | ||
317 | |||
318 | /** | ||
319 | * @return @p true if the process has already finished and has exited | ||
320 | * "voluntarily", ie: it has not been killed by a signal. | ||
321 | * | ||
322 | * Note that you should check @ref OProcess::exitStatus() to determine | ||
323 | * whether the process completed its task successful or not. | ||
324 | */ | ||
325 | bool normalExit() const; | ||
326 | |||
327 | /** | ||
328 | * Returns the exit status of the process. | ||
329 | * | ||
330 | * Please use | ||
331 | * @ref OProcess::normalExit() to check whether the process has exited | ||
332 | * cleanly (i.e., @ref OProcess::normalExit() returns @p true) before calling | ||
333 | * this function because if the process did not exit normally, | ||
334 | * it does not have a valid exit status. | ||
335 | */ | ||
336 | int exitStatus() const; | ||
337 | |||
338 | |||
339 | /** | ||
340 | * Transmit data to the child process's stdin. | ||
341 | * | ||
342 | * OProcess::writeStdin may return false in the following cases: | ||
343 | * | ||
344 | * @li The process is not currently running. | ||
345 | * | ||
346 | * @li Communication to stdin has not been requested in the @ref start() call. | ||
347 | * | ||
348 | * @li Transmission of data to the child process by a previous call to | ||
349 | * @ref writeStdin() is still in progress. | ||
350 | * | ||
351 | * Please note that the data is sent to the client asynchronously, | ||
352 | * so when this function returns, the data might not have been | ||
353 | * processed by the child process. | ||
354 | * | ||
355 | * If all the data has been sent to the client, the signal | ||
356 | * @ref wroteStdin() will be emitted. | ||
357 | * | ||
358 | * Please note that you must not free "buffer" or call @ref writeStdin() | ||
359 | * again until either a @ref wroteStdin() signal indicates that the | ||
360 | * data has been sent or a @ref processHasExited() signal shows that | ||
361 | * the child process is no longer alive... | ||
362 | **/ | ||
363 | bool writeStdin(const char *buffer, int buflen); | ||
364 | |||
365 | void flushStdin(); | ||
366 | |||
367 | /** | ||
368 | * This causes the stdin file descriptor of the child process to be | ||
369 | * closed indicating an "EOF" to the child. | ||
370 | * | ||
371 | * @return @p false if no communication to the process's stdin | ||
372 | * had been specified in the call to @ref start(). | ||
373 | */ | ||
374 | bool closeStdin(); | ||
375 | |||
376 | /** | ||
377 | * This causes the stdout file descriptor of the child process to be | ||
378 | * closed. | ||
379 | * | ||
380 | * @return @p false if no communication to the process's stdout | ||
381 | * had been specified in the call to @ref start(). | ||
382 | */ | ||
383 | bool closeStdout(); | ||
384 | |||
385 | /** | ||
386 | * This causes the stderr file descriptor of the child process to be | ||
387 | * closed. | ||
388 | * | ||
389 | * @return @p false if no communication to the process's stderr | ||
390 | * had been specified in the call to @ref start(). | ||
391 | */ | ||
392 | bool closeStderr(); | ||
393 | |||
394 | /** | ||
395 | * Lets you see what your arguments are for debugging. | ||
396 | */ | ||
397 | |||
398 | const QValueList<QCString> &args() { return arguments; } | ||
399 | |||
400 | /** | ||
401 | * Controls whether the started process should drop any | ||
402 | * setuid/segid privileges or whether it should keep them | ||
403 | * | ||
404 | * The default is @p false : drop privileges | ||
405 | */ | ||
406 | void setRunPrivileged(bool keepPrivileges); | ||
407 | |||
408 | /** | ||
409 | * Returns whether the started process will drop any | ||
410 | * setuid/segid privileges or whether it will keep them | ||
411 | */ | ||
412 | bool runPrivileged() const; | ||
413 | |||
414 | /** | ||
415 | * Modifies the environment of the process to be started. | ||
416 | * This function must be called before starting the process. | ||
417 | */ | ||
418 | void setEnvironment(const QString &name, const QString &value); | ||
419 | |||
420 | /** | ||
421 | * Changes the current working directory (CWD) of the process | ||
422 | * to be started. | ||
423 | * This function must be called before starting the process. | ||
424 | */ | ||
425 | void setWorkingDirectory(const QString &dir); | ||
426 | |||
427 | /** | ||
428 | * Specify whether to start the command via a shell or directly. | ||
429 | * The default is to start the command directly. | ||
430 | * If @p useShell is true @p shell will be used as shell, or | ||
431 | * if shell is empty, the standard shell is used. | ||
432 | * @p quote A flag indicating whether to quote the arguments. | ||
433 | * | ||
434 | * When using a shell, the caller should make sure that all filenames etc. | ||
435 | * are properly quoted when passed as argument. | ||
436 | * @see quote() | ||
437 | */ | ||
438 | void setUseShell(bool useShell, const char *shell = 0); | ||
439 | |||
440 | /** | ||
441 | * This function can be used to quote an argument string such that | ||
442 | * the shell processes it properly. This is e. g. necessary for | ||
443 | * user-provided file names which may contain spaces or quotes. | ||
444 | * It also prevents expansion of wild cards and environment variables. | ||
445 | */ | ||
446 | static QString quote(const QString &arg); | ||
447 | |||
448 | /** | ||
449 | * Detaches OProcess from child process. All communication is closed. | ||
450 | * No exit notification is emitted any more for the child process. | ||
451 | * Deleting the OProcess will no longer kill the child process. | ||
452 | * Note that the current process remains the parent process of the | ||
453 | * child process. | ||
454 | */ | ||
455 | void detach(); | ||
456 | |||
457 | |||
458 | |||
459 | signals: | ||
460 | |||
461 | /** | ||
462 | * Emitted after the process has terminated when | ||
463 | * the process was run in the @p NotifyOnExit (==default option to | ||
464 | * @ref start()) or the @ref Block mode. | ||
465 | **/ | ||
466 | void processExited(OProcess *proc); | ||
467 | |||
468 | |||
469 | /** | ||
470 | * Emitted, when output from the child process has | ||
471 | * been received on stdout. | ||
472 | * | ||
473 | * To actually get | ||
474 | * these signals, the respective communication link (stdout/stderr) | ||
475 | * has to be turned on in @ref start(). | ||
476 | * | ||
477 | * @param buffer The data received. | ||
478 | * @param buflen The number of bytes that are available. | ||
479 | * | ||
480 | * You should copy the information contained in @p buffer to your private | ||
481 | * data structures before returning from this slot. | ||
482 | **/ | ||
483 | void receivedStdout(OProcess *proc, char *buffer, int buflen); | ||
484 | |||
485 | /** | ||
486 | * Emitted when output from the child process has | ||
487 | * been received on stdout. | ||
488 | * | ||
489 | * To actually get these signals, the respective communications link | ||
490 | * (stdout/stderr) has to be turned on in @ref start() and the | ||
491 | * @p NoRead flag should have been passed. | ||
492 | * | ||
493 | * You will need to explicitly call resume() after your call to start() | ||
494 | * to begin processing data from the child process's stdout. This is | ||
495 | * to ensure that this signal is not emitted when no one is connected | ||
496 | * to it, otherwise this signal will not be emitted. | ||
497 | * | ||
498 | * The data still has to be read from file descriptor @p fd. | ||
499 | **/ | ||
500 | void receivedStdout(int fd, int &len); | ||
501 | |||
502 | |||
503 | /** | ||
504 | * Emitted, when output from the child process has | ||
505 | * been received on stderr. | ||
506 | * To actually get | ||
507 | * these signals, the respective communication link (stdout/stderr) | ||
508 | * has to be turned on in @ref start(). | ||
509 | * | ||
510 | * @param buffer The data received. | ||
511 | * @param buflen The number of bytes that are available. | ||
512 | * | ||
513 | * You should copy the information contained in @p buffer to your private | ||
514 | * data structures before returning from this slot. | ||
515 | */ | ||
516 | void receivedStderr(OProcess *proc, char *buffer, int buflen); | ||
517 | |||
518 | /** | ||
519 | * Emitted after all the data that has been | ||
520 | * specified by a prior call to @ref writeStdin() has actually been | ||
521 | * written to the child process. | ||
522 | **/ | ||
523 | void wroteStdin(OProcess *proc); | ||
524 | |||
525 | |||
526 | protected slots: | ||
527 | |||
528 | /** | ||
529 | * This slot gets activated when data from the child's stdout arrives. | ||
530 | * It usually calls "childOutput" | ||
531 | */ | ||
532 | void slotChildOutput(int fdno); | ||
533 | |||
534 | /** | ||
535 | * This slot gets activated when data from the child's stderr arrives. | ||
536 | * It usually calls "childError" | ||
537 | */ | ||
538 | void slotChildError(int fdno); | ||
539 | /* | ||
540 | Slot functions for capturing stdout and stderr of the child | ||
541 | */ | ||
542 | |||
543 | /** | ||
544 | * Called when another bulk of data can be sent to the child's | ||
545 | * stdin. If there is no more data to be sent to stdin currently | ||
546 | * available, this function must disable the QSocketNotifier "innot". | ||
547 | */ | ||
548 | void slotSendData(int dummy); | ||
549 | |||
550 | protected: | ||
551 | |||
552 | /** | ||
553 | * Sets up the environment according to the data passed via | ||
554 | * setEnvironment(...) | ||
555 | */ | ||
556 | void setupEnvironment(); | ||
557 | |||
558 | /** | ||
559 | * The list of the process' command line arguments. The first entry | ||
560 | * in this list is the executable itself. | ||
561 | */ | ||
562 | QValueList<QCString> arguments; | ||
563 | /** | ||
564 | * How to run the process (Block, NotifyOnExit, DontCare). You should | ||
565 | * not modify this data member directly from derived classes. | ||
566 | */ | ||
567 | RunMode run_mode; | ||
568 | /** | ||
569 | * true if the process is currently running. You should not | ||
570 | * modify this data member directly from derived classes. For | ||
571 | * reading the value of this data member, please use "isRunning()" | ||
572 | * since "runs" will probably be made private in later versions | ||
573 | * of OProcess. | ||
574 | */ | ||
575 | bool runs; | ||
576 | |||
577 | /** | ||
578 | * The PID of the currently running process (see "getPid()"). | ||
579 | * You should not modify this data member in derived classes. | ||
580 | * Please use "getPid()" instead of directly accessing this | ||
581 | * member function since it will probably be made private in | ||
582 | * later versions of OProcess. | ||
583 | */ | ||
584 | pid_t pid_; | ||
585 | |||
586 | /** | ||
587 | * The process' exit status as returned by "waitpid". You should not | ||
588 | * modify the value of this data member from derived classes. You should | ||
589 | * rather use @ref exitStatus than accessing this data member directly | ||
590 | * since it will probably be made private in further versions of | ||
591 | * OProcess. | ||
592 | */ | ||
593 | int status; | ||
594 | |||
595 | |||
596 | /** | ||
597 | * See setRunPrivileged() | ||
598 | */ | ||
599 | bool keepPrivs; | ||
600 | |||
601 | /* | ||
602 | Functions for setting up the sockets for communication. | ||
603 | setupCommunication | ||
604 | -- is called from "start" before "fork"ing. | ||
605 | commSetupDoneP | ||
606 | -- completes communication socket setup in the parent | ||
607 | commSetupDoneC | ||
608 | -- completes communication setup in the child process | ||
609 | commClose | ||
610 | -- frees all allocated communication resources in the parent | ||
611 | after the process has exited | ||
612 | */ | ||
613 | |||
614 | /** | ||
615 | * This function is called from "OProcess::start" right before a "fork" takes | ||
616 | * place. According to | ||
617 | * the "comm" parameter this function has to initialize the "in", "out" and | ||
618 | * "err" data member of OProcess. | ||
619 | * | ||
620 | * This function should return 0 if setting the needed communication channels | ||
621 | * was successful. | ||
622 | * | ||
623 | * The default implementation is to create UNIX STREAM sockets for the communication, | ||
624 | * but you could overload this function and establish a TCP/IP communication for | ||
625 | * network communication, for example. | ||
626 | */ | ||
627 | virtual int setupCommunication(Communication comm); | ||
628 | |||
629 | /** | ||
630 | * Called right after a (successful) fork on the parent side. This function | ||
631 | * will usually do some communications cleanup, like closing the reading end | ||
632 | * of the "stdin" communication channel. | ||
633 | * | ||
634 | * Furthermore, it must also create the QSocketNotifiers "innot", "outnot" and | ||
635 | * "errnot" and connect their Qt slots to the respective OProcess member functions. | ||
636 | * | ||
637 | * For a more detailed explanation, it is best to have a look at the default | ||
638 | * implementation of "setupCommunication" in kprocess.cpp. | ||
639 | */ | ||
640 | virtual int commSetupDoneP(); | ||
641 | |||
642 | /** | ||
643 | * Called right after a (successful) fork, but before an "exec" on the child | ||
644 | * process' side. It usually just closes the unused communication ends of | ||
645 | * "in", "out" and "err" (like the writing end of the "in" communication | ||
646 | * channel. | ||
647 | */ | ||
648 | virtual int commSetupDoneC(); | ||
649 | |||
650 | |||
651 | /** | ||
652 | * Immediately called after a process has exited. This function normally | ||
653 | * calls commClose to close all open communication channels to this | ||
654 | * process and emits the "processExited" signal (if the process was | ||
655 | * not running in the "DontCare" mode). | ||
656 | */ | ||
657 | virtual void processHasExited(int state); | ||
658 | |||
659 | /** | ||
660 | * Should clean up the communication links to the child after it has | ||
661 | * exited. Should be called from "processHasExited". | ||
662 | */ | ||
663 | virtual void commClose(); | ||
664 | |||
665 | |||
666 | /** | ||
667 | * the socket descriptors for stdin/stdout/stderr. | ||
668 | */ | ||
669 | int out[2]; | ||
670 | int in[2]; | ||
671 | int err[2]; | ||
672 | |||
673 | /** | ||
674 | * The socket notifiers for the above socket descriptors. | ||
675 | */ | ||
676 | QSocketNotifier *innot; | ||
677 | QSocketNotifier *outnot; | ||
678 | QSocketNotifier *errnot; | ||
679 | |||
680 | /** | ||
681 | * Lists the communication links that are activated for the child | ||
682 | * process. Should not be modified from derived classes. | ||
683 | */ | ||
684 | Communication communication; | ||
685 | |||
686 | /** | ||
687 | * Called by "slotChildOutput" this function copies data arriving from the | ||
688 | * child process's stdout to the respective buffer and emits the signal | ||
689 | * "@ref receivedStderr". | ||
690 | */ | ||
691 | int childOutput(int fdno); | ||
692 | |||
693 | /** | ||
694 | * Called by "slotChildOutput" this function copies data arriving from the | ||
695 | * child process's stdout to the respective buffer and emits the signal | ||
696 | * "@ref receivedStderr" | ||
697 | */ | ||
698 | int childError(int fdno); | ||
699 | |||
700 | // information about the data that has to be sent to the child: | ||
701 | |||
702 | const char *input_data; // the buffer holding the data | ||
703 | int input_sent; // # of bytes already transmitted | ||
704 | int input_total; // total length of input_data | ||
705 | |||
706 | /** | ||
707 | * @ref OProcessController is a friend of OProcess because it has to have | ||
708 | * access to various data members. | ||
709 | */ | ||
710 | friend class OProcessController; | ||
711 | |||
712 | |||
713 | private: | ||
714 | /** | ||
715 | * Searches for a valid shell. | ||
716 | * Here is the algorithm used for finding an executable shell: | ||
717 | * | ||
718 | * @li Try the executable pointed to by the "SHELL" environment | ||
719 | * variable with white spaces stripped off | ||
720 | * | ||
721 | * @li If your process runs with uid != euid or gid != egid, a shell | ||
722 | * not listed in /etc/shells will not used. | ||
723 | * | ||
724 | * @li If no valid shell could be found, "/bin/sh" is used as a last resort. | ||
725 | */ | ||
726 | QCString searchShell(); | ||
727 | |||
728 | /** | ||
729 | * Used by @ref searchShell in order to find out whether the shell found | ||
730 | * is actually executable at all. | ||
731 | */ | ||
732 | bool isExecutable(const QCString &filename); | ||
733 | |||
734 | // Disallow assignment and copy-construction | ||
735 | OProcess( const OProcess& ); | ||
736 | OProcess& operator= ( const OProcess& ); | ||
737 | |||
738 | private: | ||
739 | void init ( ); | ||
740 | |||
741 | OProcessPrivate *d; | ||
742 | }; | ||
743 | |||
744 | |||
745 | |||
746 | #endif | ||
747 | |||