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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);
102: void getbasepath(char *, size_t);
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)
254: err(1, "unsetsig(hup): sigaction failed\n");
255: if (sigaction(SIGTERM, &sa, NULL) < 0)
256: err(1, "unsetsig(term): sigaction failed\n");
257: if (sigaction(SIGINT, &sa, NULL) < 0)
258: err(1, "unsetsig(int): sigaction failed\n");
259: }
260:
261: void
262: getbasepath(char *base, size_t size)
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: }
1.14 ratchov 281: umask(omask);
1.1 ratchov 282: if (stat(base, &sb) < 0)
283: err(1, "stat(\"%s\")", base);
284: if (sb.st_uid != uid || (sb.st_mode & mask) != 0)
285: errx(1, "%s has wrong permissions", base);
286: }
287:
288: struct dev *
289: mkdev(char *path, struct aparams *par,
290: int mode, int bufsz, int round, int rate, int hold, int autovol)
291: {
292: struct dev *d;
293:
294: for (d = dev_list; d != NULL; d = d->next) {
295: if (strcmp(d->path, path) == 0)
296: return d;
297: }
298: if (!bufsz && !round) {
299: round = DEFAULT_ROUND;
300: bufsz = DEFAULT_BUFSZ;
301: } else if (!bufsz) {
302: bufsz = round * 2;
303: } else if (!round)
304: round = bufsz / 2;
305: d = dev_new(path, par, mode, bufsz, round, rate, hold, autovol);
306: if (d == NULL)
307: exit(1);
308: return d;
309: }
310:
1.27 ! ratchov 311: struct port *
! 312: mkport(char *path, int hold)
! 313: {
! 314: struct port *c;
! 315:
! 316: for (c = port_list; c != NULL; c = c->next) {
! 317: if (strcmp(c->path, path) == 0)
! 318: return c;
! 319: }
! 320: c = port_new(path, MODE_MIDIMASK, hold);
! 321: if (c == NULL)
! 322: exit(1);
! 323: return c;
! 324: }
! 325:
1.1 ratchov 326: struct opt *
327: mkopt(char *path, struct dev *d,
328: int pmin, int pmax, int rmin, int rmax,
329: int mode, int vol, int mmc, int dup)
330: {
331: struct opt *o;
332:
333: o = opt_new(path, d, pmin, pmax, rmin, rmax,
334: MIDI_TO_ADATA(vol), mmc, dup, mode);
335: if (o == NULL)
1.26 ratchov 336: return NULL;
1.1 ratchov 337: dev_adjpar(d, o->mode, o->pmin, o->pmax, o->rmin, o->rmax);
338: return o;
339: }
340:
341: int
342: main(int argc, char **argv)
343: {
344: int c, background, unit;
345: int pmin, pmax, rmin, rmax;
1.25 ratchov 346: char base[SOCKPATH_MAX], path[SOCKPATH_MAX];
1.1 ratchov 347: unsigned int mode, dup, mmc, vol;
348: unsigned int hold, autovol, bufsz, round, rate;
349: const char *str;
350: struct aparams par;
351: struct dev *d;
352: struct port *p;
353: struct listen *l;
1.17 ratchov 354: struct passwd *pw;
1.25 ratchov 355: struct tcpaddr {
356: char *host;
357: struct tcpaddr *next;
358: } *tcpaddr_list, *ta;
1.18 ratchov 359: int s[2];
360: pid_t pid;
1.20 ratchov 361: uid_t euid, hpw_uid, wpw_uid;
362: gid_t hpw_gid, wpw_gid;
363: char *wpw_dir;
1.1 ratchov 364:
365: atexit(log_flush);
366:
367: /*
368: * global options defaults
369: */
370: vol = 118;
371: dup = 1;
372: mmc = 0;
373: hold = 0;
374: autovol = 1;
375: bufsz = 0;
376: round = 0;
377: rate = DEFAULT_RATE;
378: unit = 0;
379: background = 1;
380: pmin = 0;
381: pmax = 1;
382: rmin = 0;
383: rmax = 1;
384: aparams_init(&par);
385: mode = MODE_PLAY | MODE_REC;
1.25 ratchov 386: tcpaddr_list = NULL;
1.1 ratchov 387:
1.15 ratchov 388: 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 389: switch (c) {
390: case 'd':
391: log_level++;
392: background = 0;
393: break;
394: case 'U':
395: unit = strtonum(optarg, 0, 15, &str);
396: if (str)
397: errx(1, "%s: unit number is %s", optarg, str);
398: break;
399: case 'L':
1.25 ratchov 400: ta = xmalloc(sizeof(struct tcpaddr));
401: ta->host = optarg;
402: ta->next = tcpaddr_list;
403: tcpaddr_list = ta;
1.1 ratchov 404: break;
405: case 'm':
406: mode = opt_mode();
407: break;
408: case 'j':
409: dup = opt_onoff();
410: break;
411: case 't':
412: mmc = opt_mmc();
413: break;
414: case 'c':
415: opt_ch(&pmin, &pmax);
416: break;
417: case 'C':
418: opt_ch(&rmin, &rmax);
419: break;
420: case 'e':
421: opt_enc(&par);
422: break;
423: case 'r':
424: rate = strtonum(optarg, RATE_MIN, RATE_MAX, &str);
425: if (str)
426: errx(1, "%s: rate is %s", optarg, str);
427: break;
428: case 'v':
429: vol = strtonum(optarg, 0, MIDI_MAXCTL, &str);
430: if (str)
431: errx(1, "%s: volume is %s", optarg, str);
432: break;
433: case 's':
434: if ((d = dev_list) == NULL) {
435: d = mkdev(DEFAULT_DEV, &par, 0, bufsz, round, rate,
436: hold, autovol);
437: }
1.26 ratchov 438: if (mkopt(optarg, d, pmin, pmax, rmin, rmax,
439: mode, vol, mmc, dup) == NULL)
440: return 1;
1.1 ratchov 441: break;
442: case 'q':
1.27 ! ratchov 443: mkport(optarg, hold);
1.1 ratchov 444: break;
445: case 'a':
446: hold = opt_onoff();
447: break;
448: case 'w':
449: autovol = opt_onoff();
450: break;
451: case 'b':
452: bufsz = strtonum(optarg, 1, RATE_MAX, &str);
453: if (str)
454: errx(1, "%s: buffer size is %s", optarg, str);
455: break;
456: case 'z':
457: round = strtonum(optarg, 1, SHRT_MAX, &str);
458: if (str)
459: errx(1, "%s: block size is %s", optarg, str);
460: break;
461: case 'f':
462: mkdev(optarg, &par, 0, bufsz, round, rate, hold, autovol);
463: break;
464: default:
465: fputs(usagestr, stderr);
466: return 1;
467: }
468: }
469: argc -= optind;
470: argv += optind;
471: if (argc > 0) {
472: fputs(usagestr, stderr);
473: return 1;
474: }
475: if (dev_list == NULL)
476: mkdev(DEFAULT_DEV, &par, 0, bufsz, round, rate, hold, autovol);
477: for (d = dev_list; d != NULL; d = d->next) {
478: if (opt_byname("default", d->num))
479: continue;
1.26 ratchov 480: if (mkopt("default", d, pmin, pmax, rmin, rmax,
481: mode, vol, mmc, dup) == NULL)
482: return 1;
1.1 ratchov 483: }
1.17 ratchov 484:
485: setsig();
486: filelist_init();
487:
1.20 ratchov 488: euid = geteuid();
489: if (euid == 0) {
490: if ((pw = getpwnam(SNDIO_PRIV_USER)) == NULL)
491: errx(1, "unknown user %s", SNDIO_PRIV_USER);
492: hpw_uid = pw->pw_uid;
493: hpw_gid = pw->pw_gid;
494: if ((pw = getpwnam(SNDIO_USER)) == NULL)
495: errx(1, "unknown user %s", SNDIO_USER);
496: wpw_uid = pw->pw_uid;
497: wpw_gid = pw->pw_gid;
498: wpw_dir = xstrdup(pw->pw_dir);
499: } else {
1.21 ratchov 500: hpw_uid = wpw_uid = hpw_gid = wpw_gid = 0xdeadbeef;
501: wpw_dir = NULL;
1.20 ratchov 502: }
503:
1.18 ratchov 504: /* start subprocesses */
505:
506: if (socketpair(AF_UNIX, SOCK_STREAM, 0, s) < 0) {
507: perror("socketpair");
508: return 1;
1.13 ratchov 509: }
1.18 ratchov 510: pid = fork();
511: if (pid == -1) {
512: log_puts("can't fork\n");
513: return 1;
1.1 ratchov 514: }
1.18 ratchov 515: if (pid == 0) {
516: setproctitle("helper");
517: close(s[0]);
518: if (fdpass_new(s[1], &helper_fileops) == NULL)
1.1 ratchov 519: return 1;
1.18 ratchov 520: if (background) {
521: log_flush();
522: log_level = 0;
523: if (daemon(0, 0) < 0)
524: err(1, "daemon");
525: }
1.20 ratchov 526: if (euid == 0) {
527: if (setgroups(1, &hpw_gid) ||
528: setresgid(hpw_gid, hpw_gid, hpw_gid) ||
529: setresuid(hpw_uid, hpw_uid, hpw_uid))
1.18 ratchov 530: err(1, "cannot drop privileges");
531: }
1.22 ratchov 532: if (pledge("stdio sendfd rpath wpath", NULL) < 0)
533: err(1, "pledge");
1.18 ratchov 534: while (file_poll())
535: ; /* nothing */
536: } else {
537: close(s[1]);
538: if (fdpass_new(s[0], &worker_fileops) == NULL)
1.1 ratchov 539: return 1;
1.18 ratchov 540:
541: getbasepath(base, sizeof(base));
542: snprintf(path,
543: SOCKPATH_MAX, "%s/" SOCKPATH_FILE "%u",
544: base, unit);
1.23 ratchov 545: if (!listen_new_un(path))
546: return 1;
1.25 ratchov 547: for (ta = tcpaddr_list; ta != NULL; ta = ta->next) {
548: if (!listen_new_tcp(ta->host, AUCAT_PORT + unit))
1.23 ratchov 549: return 1;
550: }
1.18 ratchov 551: for (l = listen_list; l != NULL; l = l->next) {
552: if (!listen_init(l))
553: return 1;
554: }
555:
556: midi_init();
557: for (p = port_list; p != NULL; p = p->next) {
558: if (!port_init(p))
559: return 1;
560: }
561: for (d = dev_list; d != NULL; d = d->next) {
562: if (!dev_init(d))
563: return 1;
564: }
565: if (background) {
566: log_flush();
567: log_level = 0;
568: if (daemon(0, 0) < 0)
569: err(1, "daemon");
570: }
1.20 ratchov 571: if (euid == 0) {
1.18 ratchov 572: if (setpriority(PRIO_PROCESS, 0, SNDIO_PRIO) < 0)
573: err(1, "setpriority");
1.20 ratchov 574: if (chroot(wpw_dir) != 0 || chdir("/") != 0)
575: err(1, "cannot chroot to %s", wpw_dir);
576: if (setgroups(1, &wpw_gid) ||
577: setresgid(wpw_gid, wpw_gid, wpw_gid) ||
578: setresuid(wpw_uid, wpw_uid, wpw_uid))
1.18 ratchov 579: err(1, "cannot drop privileges");
1.22 ratchov 580: }
1.25 ratchov 581: if (tcpaddr_list) {
1.22 ratchov 582: if (pledge("stdio audio recvfd unix inet", NULL) == -1)
583: err(1, "pledge");
584: } else {
585: if (pledge("stdio audio recvfd unix", NULL) == -1)
586: err(1, "pledge");
1.18 ratchov 587: }
588: for (;;) {
589: if (quit_flag)
590: break;
591: if (!fdpass_peer)
592: break;
593: if (!file_poll())
594: break;
595: }
596: if (fdpass_peer)
597: fdpass_close(fdpass_peer);
598: while (listen_list != NULL)
599: listen_close(listen_list);
600: while (sock_list != NULL)
601: sock_close(sock_list);
602: for (d = dev_list; d != NULL; d = d->next)
603: dev_done(d);
604: for (p = port_list; p != NULL; p = p->next)
605: port_done(p);
606: while (file_poll())
607: ; /* nothing */
608: midi_done();
1.1 ratchov 609: }
610: while (opt_list != NULL)
611: opt_del(opt_list);
612: while (dev_list)
613: dev_del(dev_list);
614: while (port_list)
615: port_del(port_list);
1.25 ratchov 616: while (tcpaddr_list) {
617: ta = tcpaddr_list;
618: tcpaddr_list = ta->next;
619: xfree(ta);
620: }
1.1 ratchov 621: filelist_done();
622: unsetsig();
623: return 0;
624: }