source: roaraudio/libroar/vio_cmd.c @ 5248:0133acb5ae31

Last change on this file since 5248:0133acb5ae31 was 5111:090c5c2831a7, checked in by phi, 13 years ago

fixed some compiler warnings

File size: 15.5 KB
Line 
1//vio_cmd.c:
2
3/*
4 *      Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2009-2011
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 memset(state, 0, sizeof(struct roar_vio_cmd_state));
57
58 // init reader and writer:
59 state->reader.pid = -1;
60 state->reader.in  = -1;
61 state->reader.out = -1;
62
63 if ( reader != NULL )
64  state->reader.cmd = roar_mm_strdup(reader);
65
66 state->writer.pid = -1;
67 state->writer.in  = -1;
68 state->writer.out = -1;
69
70 if ( writer != NULL )
71  state->writer.cmd = roar_mm_strdup(writer);
72
73 // init state
74 state->next    = dst;
75 state->options = options;
76 state->state   = ROAR_VIO_CMD_STATE_OPEN;
77
78 // init calls
79 calls->close    = roar_vio_cmd_close;
80 calls->read     = roar_vio_cmd_read;
81 calls->write    = roar_vio_cmd_write;
82 calls->nonblock = roar_vio_cmd_nonblock;
83 calls->sync     = roar_vio_cmd_sync;
84 calls->ctl      = roar_vio_cmd_ctl;
85 calls->inst     = (void*) state;
86
87 ROAR_DBG("roar_vio_open_cmd(*): var setup OK");
88
89 if ( !(options & ROAR_VIO_CMD_OPTS_ON_DEMAND) ) {
90  if ( reader != NULL )
91   if ( roar_vio_cmd_fork(&(state->reader)) == -1 )
92    return roar_vio_cmd_close(calls);
93
94  if ( writer != NULL )
95   if ( roar_vio_cmd_fork(&(state->writer)) == -1 )
96    return roar_vio_cmd_close(calls);
97 }
98
99 return 0;
100#else
101 return -1;
102#endif
103}
104
105#ifndef ROAR_WITHOUT_VIO_CMD
106int roar_vio_cmd_close(struct roar_vio_calls * vio) {
107 struct roar_vio_cmd_state * state = (struct roar_vio_cmd_state *)vio->inst;
108
109 state->state = ROAR_VIO_CMD_STATE_CLOSING;
110
111 if ( state->writer.opened ) {
112  if ( state->writer.out != -1 ) {
113   close(state->writer.out);
114   state->writer.out = -1;
115  }
116 }
117
118 roar_vio_cmd_sync(vio);
119
120 if ( state->reader.opened )
121  roar_vio_cmd_wait(&(state->reader));
122
123 if ( state->writer.opened )
124  roar_vio_cmd_wait(&(state->writer));
125
126 if ( state->reader.cmd != NULL )
127  roar_mm_free(state->reader.cmd);
128
129 if ( state->writer.cmd != NULL )
130  roar_mm_free(state->writer.cmd);
131
132 roar_vio_close(state->next);
133
134// state->state = ROAR_VIO_CMD_STATE_CLOSED;
135 roar_mm_free(state);
136
137 return 0;
138}
139
140int roar_vio_cmd_fork(struct roar_vio_cmd_child * child) {
141 int in[2], out[2];
142
143 if ( child == NULL )
144  return -1;
145
146 if ( child->opened )
147  return 0;
148
149 if ( child->cmd == NULL )
150  return -1;
151
152 // open some pipes...
153 if ( pipe(in) != 0 )
154  return -1;
155
156 if ( pipe(out) != 0 ) {
157  close(in[0]);
158  close(in[1]);
159  return -1;
160 }
161
162 child->pid = fork();
163
164 switch (child->pid) {
165  case -1:
166    close(in[0]);
167    close(in[1]);
168    close(out[0]);
169    close(out[1]);
170    return -1;
171   break;
172  case 0:
173    close(in[0]);
174    close(out[1]);
175    close(ROAR_STDIN);
176    close(ROAR_STDOUT);
177
178    if ( dup2(out[0], ROAR_STDIN) == -1 )
179     _exit(1);
180
181    if ( dup2(in[1], ROAR_STDOUT) == -1 )
182     _exit(1);
183
184    execlp("/bin/sh", "/bin/sh", "-c", child->cmd, (char*)NULL);
185
186    _exit(1);
187   break;
188 }
189
190 close(in[1]);
191 close(out[0]);
192
193 child->opened = 1;
194 child->in     = in[0];
195 child->out    = out[1];
196
197 return 0;
198}
199
200int roar_vio_cmd_wait(struct roar_vio_cmd_child * child) {
201 int status;
202
203 if ( child == NULL )
204  return -1;
205
206 if ( !child->opened )
207  return 0;
208
209 if ( child->out != -1 )
210  close(child->out);
211
212 if ( child->in  != -1 )
213  close(child->in);
214
215 waitpid(child->pid, &status, 0);
216
217 return 0;
218}
219
220
221
222int roar_vio_open_2popen(struct roar_vio_calls * calls, char * command, int options) {
223#ifndef ROAR_WITHOUT_VIO_CMD
224 struct roar_vio_2popen_state * state;
225
226 if ( calls == NULL || command == NULL || options < 0 )
227  return -1;
228
229 if ( (state = roar_mm_malloc(sizeof(struct roar_vio_2popen_state))) == NULL )
230  return -1;
231
232 ROAR_DBG("roar_vio_open_2popen(*): pre reqs are OK");
233
234 // clear all
235 memset(calls, 0, sizeof(struct roar_vio_calls));
236 memset(state, 0, sizeof(struct roar_vio_2popen_state));
237
238 // init reader and writer:
239 state->child.pid = -1;
240 state->child.in  = -1;
241 state->child.out = -1;
242
243 state->child.cmd = roar_mm_strdup(command);
244
245 // init state
246 state->options = options;
247 state->state   = ROAR_VIO_CMD_STATE_OPEN;
248
249 // init calls
250 calls->close    = roar_vio_2popen_close;
251/*
252 calls->read     = roar_vio_2popen_read;
253 calls->write    = roar_vio_2popen_write;
254 calls->nonblock = roar_vio_2popen_nonblock;
255 calls->sync     = roar_vio_2popen_sync;
256 calls->ctl      = roar_vio_2popen_ctl;
257*/
258 calls->inst     = (void*) state;
259
260 ROAR_DBG("roar_vio_open_2popen(*): var setup OK");
261
262 if ( !(options & ROAR_VIO_CMD_OPTS_ON_DEMAND) ) {
263  if ( roar_vio_cmd_fork(&(state->child)) == -1 )
264   return roar_vio_2popen_close(calls);
265 }
266
267 return 0;
268#else
269 return -1;
270#endif
271}
272
273#ifndef ROAR_WITHOUT_VIO_CMD
274int roar_vio_2popen_close(struct roar_vio_calls * vio) {
275 struct roar_vio_2popen_state * state = (struct roar_vio_2popen_state *)vio->inst;
276
277 state->state = ROAR_VIO_CMD_STATE_CLOSING;
278
279 if ( state->child.opened )
280  roar_vio_cmd_wait(&(state->child));
281
282 if ( state->child.cmd != NULL )
283  roar_mm_free(state->child.cmd);
284
285 roar_mm_free(state);
286
287 return 0;
288}
289#endif
290
291
292// VIOs:
293
294ssize_t roar_vio_cmd_read    (struct roar_vio_calls * vio, void *buf, size_t count) {
295 struct roar_vio_cmd_state * state = (struct roar_vio_cmd_state *)vio->inst;
296 fd_set rfhs[1], wfhs[1];
297 struct timeval tv;
298 size_t done = 0;
299 int max_fh;
300 int ret;
301 char   tbuf[ROAR_VIO_CMD_BUFSIZE];
302 char * tp   = NULL;
303 size_t tlen = 0;
304 int    nonblock = state->options & ROAR_VIO_CMD_OPTS_NONBLOCK;
305 int    in, out;
306 int    eating = 1;
307
308 ROAR_DBG("roar_vio_cmd_read(*) = ?");
309
310 if ( !state->reader.opened ) {
311  if ( buf == NULL && count == 0 ) /* sync: no need to do anything if no reader is forked :) */
312   return 0;
313
314  if ( !(state->options & ROAR_VIO_CMD_OPTS_ON_DEMAND) ) /* we are not on demand and no reader exists? -> err */
315   return -1;
316
317  if ( roar_vio_cmd_fork(&(state->reader)) == -1 )
318   return -1;
319 }
320
321 in  = state->reader.in;
322 out = state->reader.out;
323
324 while (done < count || eating) {
325  if ( nonblock ) {
326   tv.tv_sec  =    0;
327   tv.tv_usec =    1;
328  } else {
329   tv.tv_sec  = 3600;
330   tv.tv_usec =    0;
331  }
332
333  FD_ZERO(rfhs);
334  FD_ZERO(wfhs);
335
336  FD_SET(in,  rfhs);
337
338  if ( out != -1 ) {
339   FD_SET(out, wfhs);
340  }
341
342#ifdef DEBUG
343  if ( FD_ISSET(in, rfhs) ) {
344   ROAR_DBG("roar_vio_cmd_read(*): reader set in fh group");
345  }
346#endif
347
348  max_fh = in > out ? in : out;
349  ROAR_DBG("roar_vio_cmd_read(*): max_fh=%i", max_fh);
350
351  if ( (ret = select(max_fh + 1, rfhs, wfhs, NULL, &tv)) == -1 )
352   return -1;
353
354  ROAR_DBG("roar_vio_cmd_read(*): select(*) = %i", ret);
355  ROAR_DBG("roar_vio_cmd_read(*): reader=%i, writer=%i", in, out);
356
357  if ( ret > 0 ) {
358   if ( FD_ISSET(in, rfhs) ) {
359    ROAR_DBG("roar_vio_cmd_read(*): event on reader");
360
361    if ( (ret = read(in, buf+done, count-done)) == -1 )
362     break;
363
364    if ( ret == 0 )
365     break;
366
367    done += ret;
368   }
369
370   if ( out != -1 && FD_ISSET(out, wfhs) ) {
371    ROAR_DBG("roar_vio_cmd_read(*): event on writer");
372    eating = 1;
373
374    if ( !tlen ) {
375     tp   = tbuf;
376     tlen = 0;
377     if ( (tlen = roar_vio_read(state->next, tp, ROAR_VIO_CMD_BUFSIZE)) == -1 )
378      continue;
379    }
380
381    if ( tlen ) {
382     if ( (ret = write(out, tp, tlen)) > 0 ) {
383      tlen -= ret;
384      tp   += ret;
385     }
386    } else {
387     close(out);
388     state->reader.out = out = -1;
389    }
390   } else {
391    eating = 0;
392   }
393  }
394
395  if ( nonblock )
396   break;
397 }
398
399 if ( tlen ) { /* we have some data to write to the child... */
400  // TODO: try to write it out...
401  return -1;
402 }
403
404 return done;
405}
406
407ssize_t roar_vio_cmd_write   (struct roar_vio_calls * vio, void *buf, size_t count) {
408 struct roar_vio_cmd_state * state = (struct roar_vio_cmd_state *)vio->inst;
409 fd_set rfhs[1], wfhs[1];
410 struct timeval tv;
411 size_t done = 0;
412 int max_fh;
413 int ret;
414 char   tbuf[ROAR_VIO_CMD_BUFSIZE];
415 int    nonblock = state->options & ROAR_VIO_CMD_OPTS_NONBLOCK;
416 int    in, out;
417
418 if ( !state->writer.opened ) {
419  if ( buf == NULL && count == 0 ) /* sync: no need to do anything if no writer is forked :) */
420   return 0;
421
422  if ( !(state->options & ROAR_VIO_CMD_OPTS_ON_DEMAND) ) /* we are not on demand and no writer exists? -> err */
423   return -1;
424
425  if ( roar_vio_cmd_fork(&(state->writer)) == -1 )
426   return -1;
427 }
428
429 in  = state->writer.in;
430 out = state->writer.out;
431
432 if ( buf == NULL ) { // we are requested to sync
433  if ( in != -1 ) {
434   ret = 1;
435   done = 0;
436   while (ret > 0) {
437    if ( state->state == ROAR_VIO_CMD_STATE_CLOSING ) {
438     tv.tv_sec  = 3600;
439     tv.tv_usec = 0;
440    } else {
441     tv.tv_sec  = 0;
442     tv.tv_usec = done ? 1 : 50000; // 50ms
443    }
444
445    done++;
446
447    FD_ZERO(rfhs);
448    FD_SET(in, rfhs);
449
450    if ( select(in+1, rfhs, NULL, NULL, &tv) < 1 )
451     break;
452
453    ret = read(in, tbuf, ROAR_VIO_CMD_BUFSIZE);
454
455    if ( roar_vio_write(state->next, tbuf, ret) != ret )
456     return -1;
457   }
458  }
459
460  return 0;
461 }
462
463 while (done < count) {
464  if ( nonblock ) {
465   tv.tv_sec  =    0;
466   tv.tv_usec =    1;
467  } else {
468   tv.tv_sec  = 3600;
469   tv.tv_usec =    0;
470  }
471
472  FD_ZERO(rfhs);
473  FD_ZERO(wfhs);
474
475  FD_SET(out, wfhs);
476
477  if ( in != -1 ) {
478   FD_SET(in,  rfhs);
479  }
480
481  max_fh = in > out ? in : out;
482
483  if ( (ret = select(max_fh + 1, rfhs, wfhs, NULL, &tv)) == -1 )
484   return -1;
485
486  if ( ret > 0 ) {
487   if ( FD_ISSET(out, wfhs) ) {
488
489    if ( (ret = write(out, buf+done, count-done)) == -1 )
490     break;
491
492    if ( ret == 0 )
493     break;
494
495    done += ret;
496   }
497   if ( in != -1 && FD_ISSET(in, rfhs) ) {
498    if ( (ret = read(in, tbuf, ROAR_VIO_CMD_BUFSIZE)) == -1 ) { /* error case: can not read on reader -> EOF */
499     close(in);
500     state->writer.in = in = -1;
501     break;
502    }
503
504    if ( roar_vio_write(state->next, tbuf, ret) != ret )
505     return -1;
506   }
507  }
508
509  if ( nonblock )
510   break;
511 }
512
513 return done;
514}
515
516int     roar_vio_cmd_nonblock(struct roar_vio_calls * vio, int state) {
517 struct roar_vio_cmd_state * self = (struct roar_vio_cmd_state *)vio->inst;
518
519 self->options |= ROAR_VIO_CMD_OPTS_NONBLOCK;
520
521 if ( state == ROAR_SOCKET_BLOCK )
522  self->options -= ROAR_VIO_CMD_OPTS_NONBLOCK;
523
524 _LIBROAR_IGNORE_RET(roar_vio_nonblock(self->next, state)); // this should help, but may not nessessery.
525
526 return 0;
527}
528
529int     roar_vio_cmd_sync    (struct roar_vio_calls * vio) {
530 struct roar_vio_cmd_state * state = (struct roar_vio_cmd_state *)vio->inst;
531 int oldblock;
532 int ret = 0;
533
534 oldblock = state->options & ROAR_VIO_CMD_OPTS_NONBLOCK ? ROAR_SOCKET_NONBLOCK : ROAR_SOCKET_BLOCK;
535
536 if ( roar_vio_cmd_nonblock(vio, ROAR_SOCKET_BLOCK) == -1 )
537  return -1;
538
539 if ( roar_vio_cmd_write(vio, NULL, 0) == -1 )
540  ret = -1;
541
542 if ( roar_vio_cmd_read(vio, NULL, 0) == -1 )
543  ret = -1;
544
545 if ( roar_vio_cmd_nonblock(vio, oldblock) == -1 )
546  return -1;
547
548 return ret;
549}
550
551int     roar_vio_cmd_ctl     (struct roar_vio_calls * vio, int cmd, void * data) {
552 struct roar_vio_cmd_state * state = (struct roar_vio_cmd_state *)vio->inst;
553 char buf[1];
554
555 ROAR_WARN("roar_vio_cmd_ctl(vio=%p, cmd=0x%.8x, data=%p) = ?", vio, cmd, data);
556
557 switch (cmd) {
558  case ROAR_VIO_CTL_GET_NAME:
559    if ( data == NULL )
560     return -1;
561
562    *(char**)data = "cmd";
563    return 0;
564   break;
565  case ROAR_VIO_CTL_GET_NEXT:
566    *(struct roar_vio_calls **)data = state->next;
567    return -1;
568   break;
569  case ROAR_VIO_CTL_GET_FH:
570    return -1;
571   break;
572  case ROAR_VIO_CTL_GET_READ_FH:
573  case ROAR_VIO_CTL_GET_SELECT_READ_FH:
574//    if ( !state->reader.opened ) {
575     //for (i = 0; i < 128; i++)
576      roar_vio_cmd_read(vio, buf, 0);
577//    }
578    if ( state->reader.opened ) {
579     ROAR_WARN("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);
580     *(int*)data = state->reader.in;
581     return 0;
582    }
583    return -1;
584   break;
585  case ROAR_VIO_CTL_GET_WRITE_FH:
586    return -1;
587   break;
588  default:
589    return -1;
590 }
591
592 return 0;
593}
594#endif
595
596// MISC:
597int roar_vio_open_gzip(struct roar_vio_calls * calls, struct roar_vio_calls * dst, int level) {
598 roar_debug_warn_obsolete("roar_vio_open_gzip", "roar_vio_open_zlib", NULL);
599
600#ifdef ROAR_HAVE_LIBZ
601 return roar_vio_open_zlib(calls, dst, level, 1);
602#else
603 roar_err_set(ROAR_ERROR_NOSYS);
604 return -1;
605#endif
606}
607
608int roar_vio_open_gpg(struct roar_vio_calls * calls, struct roar_vio_calls * dst, char * pw, int wronly, char * opts, int options) {
609#if defined(ROAR_HAVE_BIN_GPG) && !defined(ROAR_WITHOUT_VIO_CMD)
610 char command[1024];
611 char para[1024] = {0};
612 int pwpipe[2];
613 int ret;
614
615/*
616#define ROAR_VIO_PGP_OPTS_NONE      0x00
617#define ROAR_VIO_PGP_OPTS_ASCII     0x01
618#define ROAR_VIO_PGP_OPTS_SIGN      0x02
619#define ROAR_VIO_PGP_OPTS_TEXTMODE  0x04
620*/
621
622 if ( options & ROAR_VIO_PGP_OPTS_ASCII )
623  strncat(para, "--armor ", 16);
624
625 if ( options & ROAR_VIO_PGP_OPTS_SIGN )
626  strncat(para, "--sign ", 16);
627
628 if ( options & ROAR_VIO_PGP_OPTS_TEXTMODE )
629  strncat(para, "--textmode ", 16);
630
631 if ( pw != NULL ) {
632  if ( pipe(pwpipe) == -1 )
633   return -1;
634
635  snprintf(command, 1024, "%s --batch --no-verbose --quiet --passphrase-repeat 0 --passphrase-fd %i %s %s", ROAR_HAVE_BIN_GPG, pwpipe[0], para, opts);
636
637  write(pwpipe[1], pw, strlen(pw));
638
639  close(pwpipe[1]);
640 } else {
641  snprintf(command, 1024, "%s --no-verbose --quiet %s %s", ROAR_HAVE_BIN_GPG, para, opts);
642 }
643
644 if ( wronly ) {
645  ret = roar_vio_open_cmd(calls, dst, NULL, command, 0);
646 } else {
647  ret = roar_vio_open_cmd(calls, dst, command, NULL, 0);
648 }
649
650 if ( pw != NULL )
651  close(pwpipe[0]);
652
653 return ret;
654#else
655 return -1;
656#endif
657}
658
659int roar_vio_open_pgp_decrypt(struct roar_vio_calls * calls, struct roar_vio_calls * dst, char * pw) {
660 return roar_vio_open_gpg(calls, dst, pw, 0, "-d", ROAR_VIO_PGP_OPTS_NONE);
661}
662
663int roar_vio_open_pgp_store(struct roar_vio_calls * calls, struct roar_vio_calls * dst, int options) {
664 return roar_vio_open_gpg(calls, dst, NULL, 1, "--store", options);
665}
666
667int roar_vio_open_pgp_encrypt_sym(struct roar_vio_calls * calls, struct roar_vio_calls * dst, char * pw, int options) {
668 return roar_vio_open_gpg(calls, dst, pw, 1, "--symmetric", options);
669}
670int roar_vio_open_pgp_encrypt_pub(struct roar_vio_calls * calls, struct roar_vio_calls * dst, char * pw, int options, char * recipient) {
671 char buf[1024];
672
673 snprintf(buf, 1024, "-e -r %s", recipient);
674 return roar_vio_open_gpg(calls, dst, pw, 1, buf, options);
675}
676
677//ll
Note: See TracBrowser for help on using the repository browser.