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1.18 ratchov 1: /* $OpenBSD$ */
1.1 ratchov 2: /*
3: * Copyright (c) 2008-2012 Alexandre Ratchov <alex@caoua.org>
4: *
5: * Permission to use, copy, modify, and distribute this software for any
6: * purpose with or without fee is hereby granted, provided that the above
7: * copyright notice and this permission notice appear in all copies.
8: *
9: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16: */
17: #include <sys/stat.h>
18: #include <sys/types.h>
19: #include <sys/resource.h>
1.18 ratchov 20: #include <sys/socket.h>
1.1 ratchov 21:
22: #include <err.h>
23: #include <errno.h>
24: #include <fcntl.h>
25: #include <grp.h>
26: #include <limits.h>
27: #include <pwd.h>
28: #include <signal.h>
29: #include <sndio.h>
30: #include <stdio.h>
31: #include <stdlib.h>
32: #include <string.h>
33: #include <unistd.h>
34:
35: #include "amsg.h"
36: #include "defs.h"
37: #include "dev.h"
1.18 ratchov 38: #include "fdpass.h"
1.1 ratchov 39: #include "file.h"
40: #include "listen.h"
41: #include "midi.h"
42: #include "opt.h"
43: #include "sock.h"
44: #include "utils.h"
45:
46: /*
47: * unprivileged user name
48: */
49: #ifndef SNDIO_USER
50: #define SNDIO_USER "_sndio"
51: #endif
52:
53: /*
1.18 ratchov 54: * privileged user name
55: */
56: #ifndef SNDIO_PRIV_USER
57: #define SNDIO_PRIV_USER "_sndiop"
58: #endif
59:
60: /*
1.1 ratchov 61: * priority when run as root
62: */
63: #ifndef SNDIO_PRIO
64: #define SNDIO_PRIO (-20)
65: #endif
66:
67: /*
68: * sample rate if no ``-r'' is used
69: */
70: #ifndef DEFAULT_RATE
71: #define DEFAULT_RATE 48000
72: #endif
73:
74: /*
75: * block size if neither ``-z'' nor ``-b'' is used
76: */
77: #ifndef DEFAULT_ROUND
78: #define DEFAULT_ROUND 960
79: #endif
80:
81: /*
82: * buffer size if neither ``-z'' nor ``-b'' is used
83: */
84: #ifndef DEFAULT_BUFSZ
1.8 dcoppa 85: #define DEFAULT_BUFSZ 7680
1.1 ratchov 86: #endif
87:
88: /*
89: * default device in server mode
90: */
91: #ifndef DEFAULT_DEV
92: #define DEFAULT_DEV "rsnd/0"
93: #endif
1.5 ratchov 94:
95: void sigint(int);
96: void opt_ch(int *, int *);
97: void opt_enc(struct aparams *);
98: int opt_mmc(void);
99: int opt_onoff(void);
100: int getword(char *, char **);
101: unsigned int opt_mode(void);
1.31 ratchov 102: void getbasepath(char *);
1.5 ratchov 103: void setsig(void);
104: void unsetsig(void);
105: struct dev *mkdev(char *, struct aparams *,
106: int, int, int, int, int, int);
1.27 ratchov 107: struct port *mkport(char *, int);
1.5 ratchov 108: struct opt *mkopt(char *, struct dev *,
109: int, int, int, int, int, int, int, int);
1.1 ratchov 110:
111: unsigned int log_level = 0;
112: volatile sig_atomic_t quit_flag = 0;
113:
114: char usagestr[] = "usage: sndiod [-d] [-a flag] [-b nframes] "
115: "[-C min:max] [-c min:max] [-e enc]\n\t"
116: "[-f device] [-j flag] [-L addr] [-m mode] [-q port] [-r rate]\n\t"
117: "[-s name] [-t mode] [-U unit] [-v volume] [-w flag] [-z nframes]\n";
118:
119: /*
120: * SIGINT handler, it raises the quit flag. If the flag is already set,
121: * that means that the last SIGINT was not handled, because the process
122: * is blocked somewhere, so exit.
123: */
124: void
125: sigint(int s)
126: {
127: if (quit_flag)
128: _exit(1);
129: quit_flag = 1;
130: }
131:
132: void
133: opt_ch(int *rcmin, int *rcmax)
134: {
135: char *next, *end;
136: long cmin, cmax;
137:
138: errno = 0;
139: cmin = strtol(optarg, &next, 10);
140: if (next == optarg || *next != ':')
141: goto failed;
142: cmax = strtol(++next, &end, 10);
143: if (end == next || *end != '\0')
144: goto failed;
145: if (cmin < 0 || cmax < cmin || cmax >= NCHAN_MAX)
146: goto failed;
147: *rcmin = cmin;
148: *rcmax = cmax;
149: return;
150: failed:
151: errx(1, "%s: bad channel range", optarg);
152: }
153:
154: void
155: opt_enc(struct aparams *par)
156: {
157: int len;
158:
159: len = aparams_strtoenc(par, optarg);
160: if (len == 0 || optarg[len] != '\0')
161: errx(1, "%s: bad encoding", optarg);
162: }
163:
164: int
165: opt_mmc(void)
166: {
167: if (strcmp("off", optarg) == 0)
168: return 0;
169: if (strcmp("slave", optarg) == 0)
170: return 1;
171: errx(1, "%s: off/slave expected", optarg);
172: }
173:
174: int
175: opt_onoff(void)
176: {
177: if (strcmp("off", optarg) == 0)
178: return 0;
179: if (strcmp("on", optarg) == 0)
180: return 1;
181: errx(1, "%s: on/off expected", optarg);
182: }
183:
1.4 ratchov 184: int
185: getword(char *word, char **str)
186: {
187: char *p = *str;
188:
189: for (;;) {
190: if (*word == '\0')
191: break;
192: if (*word++ != *p++)
193: return 0;
194: }
195: if (*p == ',' || *p == '\0') {
196: *str = p;
197: return 1;
198: }
199: return 0;
200: }
201:
1.1 ratchov 202: unsigned int
203: opt_mode(void)
204: {
205: unsigned int mode = 0;
206: char *p = optarg;
207:
1.4 ratchov 208: for (;;) {
209: if (getword("play", &p)) {
1.1 ratchov 210: mode |= MODE_PLAY;
1.4 ratchov 211: } else if (getword("rec", &p)) {
1.1 ratchov 212: mode |= MODE_REC;
1.4 ratchov 213: } else if (getword("mon", &p)) {
1.1 ratchov 214: mode |= MODE_MON;
1.4 ratchov 215: } else if (getword("midi", &p)) {
1.1 ratchov 216: mode |= MODE_MIDIMASK;
1.4 ratchov 217: } else
1.1 ratchov 218: errx(1, "%s: bad mode", optarg);
219: if (*p == '\0')
220: break;
1.4 ratchov 221: p++;
1.1 ratchov 222: }
223: if (mode == 0)
224: errx(1, "empty mode");
225: return mode;
226: }
227:
228: void
229: setsig(void)
230: {
231: struct sigaction sa;
232:
233: quit_flag = 0;
234: sigfillset(&sa.sa_mask);
235: sa.sa_flags = SA_RESTART;
236: sa.sa_handler = sigint;
237: if (sigaction(SIGINT, &sa, NULL) < 0)
238: err(1, "sigaction(int) failed");
239: if (sigaction(SIGTERM, &sa, NULL) < 0)
240: err(1, "sigaction(term) failed");
241: if (sigaction(SIGHUP, &sa, NULL) < 0)
242: err(1, "sigaction(hup) failed");
243: }
244:
245: void
246: unsetsig(void)
247: {
248: struct sigaction sa;
249:
250: sigfillset(&sa.sa_mask);
251: sa.sa_flags = SA_RESTART;
252: sa.sa_handler = SIG_DFL;
253: if (sigaction(SIGHUP, &sa, NULL) < 0)
1.29 ratchov 254: err(1, "unsetsig(hup): sigaction failed");
1.1 ratchov 255: if (sigaction(SIGTERM, &sa, NULL) < 0)
1.29 ratchov 256: err(1, "unsetsig(term): sigaction failed");
1.1 ratchov 257: if (sigaction(SIGINT, &sa, NULL) < 0)
1.29 ratchov 258: err(1, "unsetsig(int): sigaction failed");
1.1 ratchov 259: }
260:
261: void
1.31 ratchov 262: getbasepath(char *base)
1.1 ratchov 263: {
264: uid_t uid;
265: struct stat sb;
1.14 ratchov 266: mode_t mask, omask;
1.1 ratchov 267:
268: uid = geteuid();
269: if (uid == 0) {
270: mask = 022;
1.10 ratchov 271: snprintf(base, SOCKPATH_MAX, SOCKPATH_DIR);
1.1 ratchov 272: } else {
273: mask = 077;
1.10 ratchov 274: snprintf(base, SOCKPATH_MAX, SOCKPATH_DIR "-%u", uid);
1.1 ratchov 275: }
1.14 ratchov 276: omask = umask(mask);
277: if (mkdir(base, 0777) < 0) {
1.1 ratchov 278: if (errno != EEXIST)
279: err(1, "mkdir(\"%s\")", base);
280: }
1.28 ratchov 281: umask(omask);
1.1 ratchov 282: if (stat(base, &sb) < 0)
283: err(1, "stat(\"%s\")", base);
1.30 ratchov 284: if (!S_ISDIR(sb.st_mode))
285: errx(1, "%s is not a directory", base);
1.1 ratchov 286: if (sb.st_uid != uid || (sb.st_mode & mask) != 0)
287: errx(1, "%s has wrong permissions", base);
288: }
289:
290: struct dev *
291: mkdev(char *path, struct aparams *par,
292: int mode, int bufsz, int round, int rate, int hold, int autovol)
293: {
294: struct dev *d;
295:
296: for (d = dev_list; d != NULL; d = d->next) {
297: if (strcmp(d->path, path) == 0)
298: return d;
299: }
300: if (!bufsz && !round) {
301: round = DEFAULT_ROUND;
302: bufsz = DEFAULT_BUFSZ;
303: } else if (!bufsz) {
304: bufsz = round * 2;
305: } else if (!round)
306: round = bufsz / 2;
307: d = dev_new(path, par, mode, bufsz, round, rate, hold, autovol);
308: if (d == NULL)
309: exit(1);
310: return d;
311: }
312:
1.27 ratchov 313: struct port *
314: mkport(char *path, int hold)
315: {
316: struct port *c;
317:
318: for (c = port_list; c != NULL; c = c->next) {
319: if (strcmp(c->path, path) == 0)
320: return c;
321: }
322: c = port_new(path, MODE_MIDIMASK, hold);
323: if (c == NULL)
324: exit(1);
325: return c;
326: }
327:
1.1 ratchov 328: struct opt *
329: mkopt(char *path, struct dev *d,
330: int pmin, int pmax, int rmin, int rmax,
331: int mode, int vol, int mmc, int dup)
332: {
333: struct opt *o;
334:
335: o = opt_new(path, d, pmin, pmax, rmin, rmax,
336: MIDI_TO_ADATA(vol), mmc, dup, mode);
337: if (o == NULL)
1.26 ratchov 338: return NULL;
1.31 ratchov 339: dev_adjpar(d, o->mode, o->pmax, o->rmax);
1.1 ratchov 340: return o;
341: }
342:
1.32 ! ratchov 343: static int
! 344: start_helper(int background)
! 345: {
! 346: struct passwd *pw;
! 347: int s[2];
! 348: pid_t pid;
! 349:
! 350: if (geteuid() == 0) {
! 351: if ((pw = getpwnam(SNDIO_PRIV_USER)) == NULL)
! 352: errx(1, "unknown user %s", SNDIO_PRIV_USER);
! 353: } else
! 354: pw = NULL;
! 355: if (socketpair(AF_UNIX, SOCK_STREAM, 0, s) < 0) {
! 356: perror("socketpair");
! 357: return 0;
! 358: }
! 359: pid = fork();
! 360: if (pid == -1) {
! 361: log_puts("can't fork\n");
! 362: return 0;
! 363: }
! 364: if (pid == 0) {
! 365: setproctitle("helper");
! 366: close(s[0]);
! 367: if (fdpass_new(s[1], &helper_fileops) == NULL)
! 368: return 0;
! 369: if (background) {
! 370: log_flush();
! 371: log_level = 0;
! 372: if (daemon(0, 0) < 0)
! 373: err(1, "daemon");
! 374: }
! 375: if (pw != NULL) {
! 376: if (setgroups(1, &pw->pw_gid) ||
! 377: setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) ||
! 378: setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid))
! 379: err(1, "cannot drop privileges");
! 380: }
! 381: if (pledge("stdio sendfd rpath wpath", NULL) < 0)
! 382: err(1, "pledge");
! 383: while (file_poll())
! 384: ; /* nothing */
! 385: exit(0);
! 386: } else {
! 387: close(s[1]);
! 388: if (fdpass_new(s[0], &worker_fileops) == NULL)
! 389: return 0;
! 390: }
! 391: return 1;
! 392: }
! 393:
! 394: static void
! 395: stop_helper(void)
! 396: {
! 397: if (fdpass_peer)
! 398: fdpass_close(fdpass_peer);
! 399: }
! 400:
1.1 ratchov 401: int
402: main(int argc, char **argv)
403: {
404: int c, background, unit;
405: int pmin, pmax, rmin, rmax;
1.25 ratchov 406: char base[SOCKPATH_MAX], path[SOCKPATH_MAX];
1.1 ratchov 407: unsigned int mode, dup, mmc, vol;
408: unsigned int hold, autovol, bufsz, round, rate;
409: const char *str;
410: struct aparams par;
411: struct dev *d;
412: struct port *p;
413: struct listen *l;
1.17 ratchov 414: struct passwd *pw;
1.25 ratchov 415: struct tcpaddr {
416: char *host;
417: struct tcpaddr *next;
418: } *tcpaddr_list, *ta;
1.1 ratchov 419:
420: atexit(log_flush);
421:
422: /*
423: * global options defaults
424: */
425: vol = 118;
426: dup = 1;
427: mmc = 0;
428: hold = 0;
429: autovol = 1;
430: bufsz = 0;
431: round = 0;
432: rate = DEFAULT_RATE;
433: unit = 0;
434: background = 1;
435: pmin = 0;
436: pmax = 1;
437: rmin = 0;
438: rmax = 1;
439: aparams_init(&par);
440: mode = MODE_PLAY | MODE_REC;
1.25 ratchov 441: tcpaddr_list = NULL;
1.1 ratchov 442:
1.15 ratchov 443: while ((c = getopt(argc, argv, "a:b:c:C:de:f:j:L:m:q:r:s:t:U:v:w:x:z:")) != -1) {
1.1 ratchov 444: switch (c) {
445: case 'd':
446: log_level++;
447: background = 0;
448: break;
449: case 'U':
450: unit = strtonum(optarg, 0, 15, &str);
451: if (str)
452: errx(1, "%s: unit number is %s", optarg, str);
453: break;
454: case 'L':
1.25 ratchov 455: ta = xmalloc(sizeof(struct tcpaddr));
456: ta->host = optarg;
457: ta->next = tcpaddr_list;
458: tcpaddr_list = ta;
1.1 ratchov 459: break;
460: case 'm':
461: mode = opt_mode();
462: break;
463: case 'j':
464: dup = opt_onoff();
465: break;
466: case 't':
467: mmc = opt_mmc();
468: break;
469: case 'c':
470: opt_ch(&pmin, &pmax);
471: break;
472: case 'C':
473: opt_ch(&rmin, &rmax);
474: break;
475: case 'e':
476: opt_enc(&par);
477: break;
478: case 'r':
479: rate = strtonum(optarg, RATE_MIN, RATE_MAX, &str);
480: if (str)
481: errx(1, "%s: rate is %s", optarg, str);
482: break;
483: case 'v':
484: vol = strtonum(optarg, 0, MIDI_MAXCTL, &str);
485: if (str)
486: errx(1, "%s: volume is %s", optarg, str);
487: break;
488: case 's':
489: if ((d = dev_list) == NULL) {
1.28 ratchov 490: d = mkdev(DEFAULT_DEV, &par, 0, bufsz, round,
491: rate, hold, autovol);
1.1 ratchov 492: }
1.26 ratchov 493: if (mkopt(optarg, d, pmin, pmax, rmin, rmax,
494: mode, vol, mmc, dup) == NULL)
495: return 1;
1.1 ratchov 496: break;
497: case 'q':
1.27 ratchov 498: mkport(optarg, hold);
1.1 ratchov 499: break;
500: case 'a':
501: hold = opt_onoff();
502: break;
503: case 'w':
504: autovol = opt_onoff();
505: break;
506: case 'b':
507: bufsz = strtonum(optarg, 1, RATE_MAX, &str);
508: if (str)
509: errx(1, "%s: buffer size is %s", optarg, str);
510: break;
511: case 'z':
512: round = strtonum(optarg, 1, SHRT_MAX, &str);
513: if (str)
514: errx(1, "%s: block size is %s", optarg, str);
515: break;
516: case 'f':
1.28 ratchov 517: mkdev(optarg, &par, 0, bufsz, round,
518: rate, hold, autovol);
1.1 ratchov 519: break;
520: default:
521: fputs(usagestr, stderr);
522: return 1;
523: }
524: }
525: argc -= optind;
526: argv += optind;
527: if (argc > 0) {
528: fputs(usagestr, stderr);
529: return 1;
530: }
531: if (dev_list == NULL)
532: mkdev(DEFAULT_DEV, &par, 0, bufsz, round, rate, hold, autovol);
533: for (d = dev_list; d != NULL; d = d->next) {
534: if (opt_byname("default", d->num))
535: continue;
1.26 ratchov 536: if (mkopt("default", d, pmin, pmax, rmin, rmax,
537: mode, vol, mmc, dup) == NULL)
538: return 1;
1.1 ratchov 539: }
1.17 ratchov 540:
541: setsig();
542: filelist_init();
543:
1.32 ! ratchov 544: if (!start_helper(background))
! 545: return 1;
! 546:
! 547: if (geteuid() == 0) {
1.20 ratchov 548: if ((pw = getpwnam(SNDIO_USER)) == NULL)
549: errx(1, "unknown user %s", SNDIO_USER);
1.32 ! ratchov 550: } else
! 551: pw = NULL;
! 552: getbasepath(base);
! 553: snprintf(path, SOCKPATH_MAX, "%s/" SOCKPATH_FILE "%u", base, unit);
! 554: if (!listen_new_un(path))
! 555: return 1;
! 556: for (ta = tcpaddr_list; ta != NULL; ta = ta->next) {
! 557: if (!listen_new_tcp(ta->host, AUCAT_PORT + unit))
! 558: return 1;
1.20 ratchov 559: }
1.32 ! ratchov 560: for (l = listen_list; l != NULL; l = l->next) {
! 561: if (!listen_init(l))
! 562: return 1;
1.13 ratchov 563: }
1.32 ! ratchov 564: midi_init();
! 565: for (p = port_list; p != NULL; p = p->next) {
! 566: if (!port_init(p))
! 567: return 1;
1.1 ratchov 568: }
1.32 ! ratchov 569: for (d = dev_list; d != NULL; d = d->next) {
! 570: if (!dev_init(d))
1.1 ratchov 571: return 1;
1.32 ! ratchov 572: }
! 573: if (background) {
! 574: log_flush();
! 575: log_level = 0;
! 576: if (daemon(0, 0) < 0)
! 577: err(1, "daemon");
! 578: }
! 579: if (pw != NULL) {
! 580: if (setpriority(PRIO_PROCESS, 0, SNDIO_PRIO) < 0)
! 581: err(1, "setpriority");
! 582: if (chroot(pw->pw_dir) != 0 || chdir("/") != 0)
! 583: err(1, "cannot chroot to %s", pw->pw_dir);
! 584: if (setgroups(1, &pw->pw_gid) ||
! 585: setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) ||
! 586: setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid))
! 587: err(1, "cannot drop privileges");
! 588: }
! 589: if (tcpaddr_list) {
! 590: if (pledge("stdio audio recvfd unix inet", NULL) == -1)
1.22 ratchov 591: err(1, "pledge");
1.18 ratchov 592: } else {
1.32 ! ratchov 593: if (pledge("stdio audio recvfd unix", NULL) == -1)
! 594: err(1, "pledge");
! 595: }
! 596: for (;;) {
! 597: if (quit_flag)
! 598: break;
! 599: if (!fdpass_peer)
! 600: break;
! 601: if (!file_poll())
! 602: break;
! 603: }
! 604: stop_helper();
! 605: while (listen_list != NULL)
! 606: listen_close(listen_list);
! 607: while (sock_list != NULL)
! 608: sock_close(sock_list);
! 609: for (d = dev_list; d != NULL; d = d->next)
! 610: dev_done(d);
! 611: for (p = port_list; p != NULL; p = p->next)
! 612: port_done(p);
! 613: while (file_poll())
! 614: ; /* nothing */
! 615: midi_done();
1.18 ratchov 616:
1.1 ratchov 617: while (opt_list != NULL)
618: opt_del(opt_list);
619: while (dev_list)
620: dev_del(dev_list);
621: while (port_list)
622: port_del(port_list);
1.25 ratchov 623: while (tcpaddr_list) {
624: ta = tcpaddr_list;
625: tcpaddr_list = ta->next;
626: xfree(ta);
627: }
1.1 ratchov 628: filelist_done();
629: unsetsig();
630: return 0;
631: }