source: roaraudio/libroar/vio_cmd.c @ 5823:f9f70dbaa376

Last change on this file since 5823:f9f70dbaa376 was 5823:f9f70dbaa376, checked in by phi, 11 years ago

updated copyright

File size: 15.8 KB
Line 
1//vio_cmd.c:
2
3/*
4 *      Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2009-2013
5 *
6 *  This file is part of libroar a part of RoarAudio,
7 *  a cross-platform sound system for both, home and professional use.
8 *  See README for details.
9 *
10 *  This file is free software; you can redistribute it and/or modify
11 *  it under the terms of the GNU General Public License version 3
12 *  as published by the Free Software Foundation.
13 *
14 *  libroar is distributed in the hope that it will be useful,
15 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
16 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17 *  GNU General Public License for more details.
18 *
19 *  You should have received a copy of the GNU General Public License
20 *  along with this software; see the file COPYING.  If not, write to
21 *  the Free Software Foundation, 51 Franklin Street, Fifth Floor,
22 *  Boston, MA 02110-1301, USA.
23 *
24 *  NOTE for everyone want's to change something and send patches:
25 *  read README and HACKING! There a addition information on
26 *  the license of this document you need to read before you send
27 *  any patches.
28 *
29 *  NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc
30 *  or libpulse*:
31 *  The libs libroaresd, libroararts and libroarpulse link this lib
32 *  and are therefore GPL. Because of this it may be illigal to use
33 *  them with any software that uses libesd, libartsc or libpulse*.
34 */
35
36#include "libroar.h"
37
38int roar_vio_open_cmd(struct roar_vio_calls * calls, struct roar_vio_calls * dst,
39                      char * reader, char * writer, int options) {
40#ifndef ROAR_WITHOUT_VIO_CMD
41 struct roar_vio_cmd_state * state;
42
43 if ( calls == NULL || dst == NULL )
44  return -1;
45
46 if ( reader == NULL && writer == NULL )
47  return -1;
48
49 if ( (state = roar_mm_malloc(sizeof(struct roar_vio_cmd_state))) == NULL )
50  return -1;
51
52 ROAR_DBG("roar_vio_open_cmd(*): pre reqs are OK");
53
54 // clear all
55 memset(calls, 0, sizeof(struct roar_vio_calls));
56 calls->flags    = ROAR_VIO_FLAGS_NONE;
57 calls->refc     = 1;
58 memset(state, 0, sizeof(struct roar_vio_cmd_state));
59
60 // init reader and writer:
61 state->reader.pid = -1;
62 state->reader.in  = -1;
63 state->reader.out = -1;
64
65 if ( reader != NULL )
66  state->reader.cmd = roar_mm_strdup(reader);
67
68 state->writer.pid = -1;
69 state->writer.in  = -1;
70 state->writer.out = -1;
71
72 if ( writer != NULL )
73  state->writer.cmd = roar_mm_strdup(writer);
74
75 // init state
76 state->next    = dst;
77 state->options = options;
78 state->state   = ROAR_VIO_CMD_STATE_OPEN;
79
80 // init calls
81 calls->close    = roar_vio_cmd_close;
82 calls->read     = roar_vio_cmd_read;
83 calls->write    = roar_vio_cmd_write;
84 calls->sync     = roar_vio_cmd_sync;
85 calls->ctl      = roar_vio_cmd_ctl;
86 calls->inst     = (void*) state;
87
88 ROAR_DBG("roar_vio_open_cmd(*): var setup OK");
89
90 if ( !(options & ROAR_VIO_CMD_OPTS_ON_DEMAND) ) {
91  if ( reader != NULL )
92   if ( roar_vio_cmd_fork(&(state->reader)) == -1 )
93    return roar_vio_cmd_close(calls);
94
95  if ( writer != NULL )
96   if ( roar_vio_cmd_fork(&(state->writer)) == -1 )
97    return roar_vio_cmd_close(calls);
98 }
99
100 return 0;
101#else
102 return -1;
103#endif
104}
105
106#ifndef ROAR_WITHOUT_VIO_CMD
107int roar_vio_cmd_close(struct roar_vio_calls * vio) {
108 struct roar_vio_cmd_state * state = (struct roar_vio_cmd_state *)vio->inst;
109
110 state->state = ROAR_VIO_CMD_STATE_CLOSING;
111
112 if ( state->writer.opened ) {
113  if ( state->writer.out != -1 ) {
114   close(state->writer.out);
115   state->writer.out = -1;
116  }
117 }
118
119 roar_vio_cmd_sync(vio);
120
121 if ( state->reader.opened )
122  roar_vio_cmd_wait(&(state->reader));
123
124 if ( state->writer.opened )
125  roar_vio_cmd_wait(&(state->writer));
126
127 if ( state->reader.cmd != NULL )
128  roar_mm_free(state->reader.cmd);
129
130 if ( state->writer.cmd != NULL )
131  roar_mm_free(state->writer.cmd);
132
133 roar_vio_close(state->next);
134
135// state->state = ROAR_VIO_CMD_STATE_CLOSED;
136 roar_mm_free(state);
137
138 return 0;
139}
140
141int roar_vio_cmd_fork(struct roar_vio_cmd_child * child) {
142 int in[2], out[2];
143
144 if ( child == NULL )
145  return -1;
146
147 if ( child->opened )
148  return 0;
149
150 if ( child->cmd == NULL )
151  return -1;
152
153 // open some pipes...
154 if ( pipe(in) != 0 )
155  return -1;
156
157 if ( pipe(out) != 0 ) {
158  close(in[0]);
159  close(in[1]);
160  return -1;
161 }
162
163 child->pid = roar_fork(NULL);
164
165 switch (child->pid) {
166  case -1:
167    close(in[0]);
168    close(in[1]);
169    close(out[0]);
170    close(out[1]);
171    return -1;
172   break;
173  case 0:
174    roar_watchdog_stop();
175
176    close(in[0]);
177    close(out[1]);
178    close(ROAR_STDIN);
179    close(ROAR_STDOUT);
180
181    if ( dup2(out[0], ROAR_STDIN) == -1 )
182     ROAR_U_EXIT(1);
183
184    if ( dup2(in[1], ROAR_STDOUT) == -1 )
185     ROAR_U_EXIT(1);
186
187    execlp("/bin/sh", "/bin/sh", "-c", child->cmd, (_LIBROAR_GOOD_CAST char*)NULL);
188
189    ROAR_U_EXIT(1);
190   break;
191 }
192
193 close(in[1]);
194 close(out[0]);
195
196 child->opened = 1;
197 child->in     = in[0];
198 child->out    = out[1];
199
200 return 0;
201}
202
203int roar_vio_cmd_wait(struct roar_vio_cmd_child * child) {
204 int status;
205
206 if ( child == NULL )
207  return -1;
208
209 if ( !child->opened )
210  return 0;
211
212 if ( child->out != -1 )
213  close(child->out);
214
215 if ( child->in  != -1 )
216  close(child->in);
217
218 waitpid(child->pid, &status, 0);
219
220 return 0;
221}
222
223
224
225int roar_vio_open_2popen(struct roar_vio_calls * calls, char * command, int options) {
226#ifndef ROAR_WITHOUT_VIO_CMD
227 struct roar_vio_2popen_state * state;
228
229 if ( calls == NULL || command == NULL || options < 0 )
230  return -1;
231
232 if ( (state = roar_mm_malloc(sizeof(struct roar_vio_2popen_state))) == NULL )
233  return -1;
234
235 ROAR_DBG("roar_vio_open_2popen(*): pre reqs are OK");
236
237 // clear all
238 memset(calls, 0, sizeof(struct roar_vio_calls));
239 calls->flags    = ROAR_VIO_FLAGS_NONE;
240 calls->refc     = 1;
241 memset(state, 0, sizeof(struct roar_vio_2popen_state));
242
243 // init reader and writer:
244 state->child.pid = -1;
245 state->child.in  = -1;
246 state->child.out = -1;
247
248 state->child.cmd = roar_mm_strdup(command);
249
250 // init state
251 state->options = options;
252 state->state   = ROAR_VIO_CMD_STATE_OPEN;
253
254 // init calls
255 calls->close    = roar_vio_2popen_close;
256/*
257 calls->read     = roar_vio_2popen_read;
258 calls->write    = roar_vio_2popen_write;
259 calls->sync     = roar_vio_2popen_sync;
260 calls->ctl      = roar_vio_2popen_ctl;
261*/
262 calls->inst     = (void*) state;
263
264 ROAR_DBG("roar_vio_open_2popen(*): var setup OK");
265
266 if ( !(options & ROAR_VIO_CMD_OPTS_ON_DEMAND) ) {
267  if ( roar_vio_cmd_fork(&(state->child)) == -1 )
268   return roar_vio_2popen_close(calls);
269 }
270
271 return 0;
272#else
273 return -1;
274#endif
275}
276
277#ifndef ROAR_WITHOUT_VIO_CMD
278int roar_vio_2popen_close(struct roar_vio_calls * vio) {
279 struct roar_vio_2popen_state * state = (struct roar_vio_2popen_state *)vio->inst;
280
281 state->state = ROAR_VIO_CMD_STATE_CLOSING;
282
283 if ( state->child.opened )
284  roar_vio_cmd_wait(&(state->child));
285
286 if ( state->child.cmd != NULL )
287  roar_mm_free(state->child.cmd);
288
289 roar_mm_free(state);
290
291 return 0;
292}
293#endif
294
295
296// VIOs:
297
298ssize_t roar_vio_cmd_read    (struct roar_vio_calls * vio, void *buf, size_t count) {
299 struct roar_vio_cmd_state * state = (struct roar_vio_cmd_state *)vio->inst;
300 fd_set rfhs[1], wfhs[1];
301 struct timeval tv;
302 size_t done = 0;
303 int max_fh;
304 int ret;
305 char    tbuf[ROAR_VIO_CMD_BUFSIZE];
306 char  * tp   = NULL;
307 ssize_t tlen = 0;
308 int     nonblock = state->options & ROAR_VIO_CMD_OPTS_NONBLOCK;
309 int     in, out;
310
311 ROAR_DBG("roar_vio_cmd_read(*) = ?");
312
313 if ( !state->reader.opened ) {
314  if ( buf == NULL && count == 0 ) /* sync: no need to do anything if no reader is forked :) */
315   return 0;
316
317  if ( !(state->options & ROAR_VIO_CMD_OPTS_ON_DEMAND) ) /* we are not on demand and no reader exists? -> err */
318   return -1;
319
320  if ( roar_vio_cmd_fork(&(state->reader)) == -1 )
321   return -1;
322 }
323
324 in  = state->reader.in;
325 out = state->reader.out;
326
327 while (done < count) {
328  if ( nonblock ) {
329   tv.tv_sec  =    0;
330   tv.tv_usec =    1;
331  } else {
332   tv.tv_sec  = 3600;
333   tv.tv_usec =    0;
334  }
335
336  FD_ZERO(rfhs);
337  FD_ZERO(wfhs);
338
339  FD_SET(in,  rfhs);
340
341  if ( out != -1 ) {
342   FD_SET(out, wfhs);
343  }
344
345#ifdef DEBUG
346  if ( FD_ISSET(in, rfhs) ) {
347   ROAR_DBG("roar_vio_cmd_read(*): reader set in fh group");
348  }
349#endif
350
351  max_fh = in > out ? in : out;
352  ROAR_DBG("roar_vio_cmd_read(*): max_fh=%i", max_fh);
353
354  if ( (ret = select(max_fh + 1, rfhs, wfhs, NULL, &tv)) == -1 ) {
355#ifdef EINTR
356   if ( errno == EINTR ) {
357    ROAR_DBG("roar_vio_cmd_read(*): Ooops. Something went wrong. (will try to continue)");
358    continue;
359   }
360#endif
361#ifdef ERESTARTNOHAND
362   if ( errno == ERESTARTNOHAND ) {
363    ROAR_WARN("roar_vio_cmd_read(*): We hit a kernel bug. Haha! (will try to continue)");
364    continue;
365   }
366#endif
367   return -1;
368  }
369
370  ROAR_DBG("roar_vio_cmd_read(*): select(*) = %i", ret);
371  ROAR_DBG("roar_vio_cmd_read(*): reader=%i, writer=%i", in, out);
372
373  if ( ret > 0 ) {
374   if ( FD_ISSET(in, rfhs) ) {
375    ROAR_DBG("roar_vio_cmd_read(*): event on reader");
376
377    if ( (ret = read(in, buf+done, count-done)) == -1 )
378     break;
379
380    if ( ret == 0 )
381     break;
382
383    done += ret;
384   }
385
386   if ( out != -1 && FD_ISSET(out, wfhs) ) {
387    ROAR_DBG("roar_vio_cmd_read(*): event on writer");
388
389    if ( !tlen ) {
390     tp   = tbuf;
391     tlen = 0;
392     if ( (tlen = roar_vio_read(state->next, tp, ROAR_VIO_CMD_BUFSIZE)) == -1 ) {
393      tlen = 0;
394      continue;
395     }
396    }
397
398    if ( tlen ) {
399     if ( (ret = write(out, tp, tlen)) > 0 ) {
400      tlen -= ret;
401      tp   += ret;
402     }
403    } else {
404     close(out);
405     state->reader.out = out = -1;
406    }
407   }
408  }
409
410  if ( nonblock )
411   break;
412 }
413
414 if ( tlen ) { /* we have some data to write to the child... */
415  // TODO: try to write it out...
416  return -1;
417 }
418
419 return done;
420}
421
422ssize_t roar_vio_cmd_write   (struct roar_vio_calls * vio, void *buf, size_t count) {
423 struct roar_vio_cmd_state * state = (struct roar_vio_cmd_state *)vio->inst;
424 fd_set rfhs[1], wfhs[1];
425 struct timeval tv;
426 size_t done = 0;
427 int max_fh;
428 int ret;
429 char   tbuf[ROAR_VIO_CMD_BUFSIZE];
430 int    nonblock = state->options & ROAR_VIO_CMD_OPTS_NONBLOCK;
431 int    in, out;
432
433 if ( !state->writer.opened ) {
434  if ( buf == NULL && count == 0 ) /* sync: no need to do anything if no writer is forked :) */
435   return 0;
436
437  if ( !(state->options & ROAR_VIO_CMD_OPTS_ON_DEMAND) ) /* we are not on demand and no writer exists? -> err */
438   return -1;
439
440  if ( roar_vio_cmd_fork(&(state->writer)) == -1 )
441   return -1;
442 }
443
444 in  = state->writer.in;
445 out = state->writer.out;
446
447 if ( buf == NULL ) { // we are requested to sync
448  if ( in != -1 ) {
449   ret = 1;
450   done = 0;
451   while (ret > 0) {
452    if ( state->state == ROAR_VIO_CMD_STATE_CLOSING ) {
453     tv.tv_sec  = 3600;
454     tv.tv_usec = 0;
455    } else {
456     tv.tv_sec  = 0;
457     tv.tv_usec = done ? 1 : 50000; // 50ms
458    }
459
460    done++;
461
462    FD_ZERO(rfhs);
463    FD_SET(in, rfhs);
464
465    if ( select(in+1, rfhs, NULL, NULL, &tv) < 1 )
466     break;
467
468    ret = read(in, tbuf, ROAR_VIO_CMD_BUFSIZE);
469
470    if ( roar_vio_write(state->next, tbuf, ret) != ret )
471     return -1;
472   }
473  }
474
475  return 0;
476 }
477
478 while (done < count) {
479  if ( nonblock ) {
480   tv.tv_sec  =    0;
481   tv.tv_usec =    1;
482  } else {
483   tv.tv_sec  = 3600;
484   tv.tv_usec =    0;
485  }
486
487  FD_ZERO(rfhs);
488  FD_ZERO(wfhs);
489
490  FD_SET(out, wfhs);
491
492  if ( in != -1 ) {
493   FD_SET(in,  rfhs);
494  }
495
496  max_fh = in > out ? in : out;
497
498  if ( (ret = select(max_fh + 1, rfhs, wfhs, NULL, &tv)) == -1 )
499   return -1;
500
501  if ( ret > 0 ) {
502   if ( FD_ISSET(out, wfhs) ) {
503
504    if ( (ret = write(out, buf+done, count-done)) == -1 )
505     break;
506
507    if ( ret == 0 )
508     break;
509
510    done += ret;
511   }
512   if ( in != -1 && FD_ISSET(in, rfhs) ) {
513    if ( (ret = read(in, tbuf, ROAR_VIO_CMD_BUFSIZE)) == -1 ) { /* error case: can not read on reader -> EOF */
514     close(in);
515     state->writer.in = in = -1;
516     break;
517    }
518
519    if ( roar_vio_write(state->next, tbuf, ret) != ret )
520     return -1;
521   }
522  }
523
524  if ( nonblock )
525   break;
526 }
527
528 return done;
529}
530
531int     roar_vio_cmd_sync    (struct roar_vio_calls * vio) {
532 struct roar_vio_cmd_state * state = (struct roar_vio_cmd_state *)vio->inst;
533 int newblock = ROAR_SOCKET_BLOCK;
534 int oldblock;
535 int ret = 0;
536
537 oldblock = state->options & ROAR_VIO_CMD_OPTS_NONBLOCK ? ROAR_SOCKET_NONBLOCK : ROAR_SOCKET_BLOCK;
538
539 if ( roar_vio_cmd_ctl(vio, ROAR_VIO_CTL_NONBLOCK, &newblock) == -1 )
540  return -1;
541
542 if ( roar_vio_cmd_write(vio, NULL, 0) == -1 )
543  ret = -1;
544
545 if ( roar_vio_cmd_read(vio, NULL, 0) == -1 )
546  ret = -1;
547
548 if ( roar_vio_cmd_ctl(vio, ROAR_VIO_CTL_NONBLOCK, &oldblock) == -1 )
549  return -1;
550
551 return ret;
552}
553
554int     roar_vio_cmd_ctl     (struct roar_vio_calls * vio, roar_vio_ctl_t cmd, void * data) {
555 struct roar_vio_cmd_state * state = (struct roar_vio_cmd_state *)vio->inst;
556 char buf[1];
557
558 ROAR_DBG("roar_vio_cmd_ctl(vio=%p, cmd=0x%.8x, data=%p) = ?", vio, cmd, data);
559
560 switch (cmd) {
561  case ROAR_VIO_CTL_GET_NAME:
562    if ( data == NULL )
563     return -1;
564
565    *(char**)data = "cmd";
566    return 0;
567   break;
568  case ROAR_VIO_CTL_GET_NEXT:
569    *(struct roar_vio_calls **)data = state->next;
570    return -1;
571   break;
572  case ROAR_VIO_CTL_GET_FH:
573    return -1;
574   break;
575  case ROAR_VIO_CTL_GET_READ_FH:
576  case ROAR_VIO_CTL_GET_SELECT_READ_FH:
577//    if ( !state->reader.opened ) {
578     //for (i = 0; i < 128; i++)
579      roar_vio_cmd_read(vio, buf, 0);
580//    }
581    if ( state->reader.opened ) {
582     ROAR_DBG("roar_vio_cmd_ctl(vio=%p, cmd=ROAR_VIO_CTL_GET_READ_FH(0x%.8x), data=%p) = 0 // fh=%i", vio, cmd, data, state->reader.in);
583     *(int*)data = state->reader.in;
584     return 0;
585    }
586    return -1;
587   break;
588  case ROAR_VIO_CTL_GET_WRITE_FH:
589    return -1;
590   break;
591  case ROAR_VIO_CTL_NONBLOCK:
592    state->options |= ROAR_VIO_CMD_OPTS_NONBLOCK;
593
594    if ( *(int*)data == ROAR_SOCKET_BLOCK )
595     state->options -= ROAR_VIO_CMD_OPTS_NONBLOCK;
596
597    _LIBROAR_IGNORE_RET(roar_vio_ctl(state->next, cmd, data)); // this should help, but may not necessarily.
598   break;
599  default:
600    return -1;
601 }
602
603 return 0;
604}
605#endif
606
607// MISC:
608int roar_vio_open_gzip(struct roar_vio_calls * calls, struct roar_vio_calls * dst, int level) {
609 roar_debug_warn_obsolete("roar_vio_open_gzip", "roar_vio_open_zlib", NULL);
610
611#ifdef ROAR_HAVE_LIBZ
612 return roar_vio_open_zlib(calls, dst, level, 1);
613#else
614 roar_err_set(ROAR_ERROR_NOSYS);
615 return -1;
616#endif
617}
618
619int roar_vio_open_gpg(struct roar_vio_calls * calls, struct roar_vio_calls * dst, char * pw, int wronly, char * opts, int options) {
620#if defined(ROAR_HAVE_BIN_GPG) && !defined(ROAR_WITHOUT_VIO_CMD)
621 char command[1024];
622 char para[1024] = {0};
623 int pwpipe[2];
624 int ret;
625
626/*
627#define ROAR_VIO_PGP_OPTS_NONE      0x00
628#define ROAR_VIO_PGP_OPTS_ASCII     0x01
629#define ROAR_VIO_PGP_OPTS_SIGN      0x02
630#define ROAR_VIO_PGP_OPTS_TEXTMODE  0x04
631*/
632
633 if ( options & ROAR_VIO_PGP_OPTS_ASCII )
634  strncat(para, "--armor ", 16);
635
636 if ( options & ROAR_VIO_PGP_OPTS_SIGN )
637  strncat(para, "--sign ", 16);
638
639 if ( options & ROAR_VIO_PGP_OPTS_TEXTMODE )
640  strncat(para, "--textmode ", 16);
641
642 if ( pw != NULL ) {
643  if ( pipe(pwpipe) == -1 )
644   return -1;
645
646  snprintf(command, 1024, "%s --batch --no-verbose --quiet --passphrase-repeat 0 --passphrase-fd %i %s %s", ROAR_HAVE_BIN_GPG, pwpipe[0], para, opts);
647
648  write(pwpipe[1], pw, strlen(pw));
649
650  close(pwpipe[1]);
651 } else {
652  snprintf(command, 1024, "%s --no-verbose --quiet %s %s", ROAR_HAVE_BIN_GPG, para, opts);
653 }
654
655 if ( wronly ) {
656  ret = roar_vio_open_cmd(calls, dst, NULL, command, 0);
657 } else {
658  ret = roar_vio_open_cmd(calls, dst, command, NULL, 0);
659 }
660
661 if ( pw != NULL )
662  close(pwpipe[0]);
663
664 return ret;
665#else
666 return -1;
667#endif
668}
669
670int roar_vio_open_pgp_decrypt(struct roar_vio_calls * calls, struct roar_vio_calls * dst, char * pw) {
671 return roar_vio_open_gpg(calls, dst, pw, 0, "-d", ROAR_VIO_PGP_OPTS_NONE);
672}
673
674int roar_vio_open_pgp_store(struct roar_vio_calls * calls, struct roar_vio_calls * dst, int options) {
675 return roar_vio_open_gpg(calls, dst, NULL, 1, "--store", options);
676}
677
678int roar_vio_open_pgp_encrypt_sym(struct roar_vio_calls * calls, struct roar_vio_calls * dst, char * pw, int options) {
679 return roar_vio_open_gpg(calls, dst, pw, 1, "--symmetric", options);
680}
681int roar_vio_open_pgp_encrypt_pub(struct roar_vio_calls * calls, struct roar_vio_calls * dst, char * pw, int options, char * recipient) {
682 char buf[1024];
683
684 snprintf(buf, 1024, "-e -r %s", recipient);
685 return roar_vio_open_gpg(calls, dst, pw, 1, buf, options);
686}
687
688//ll
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