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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:
343: int
344: main(int argc, char **argv)
345: {
346: int c, background, unit;
347: int pmin, pmax, rmin, rmax;
1.25 ratchov 348: char base[SOCKPATH_MAX], path[SOCKPATH_MAX];
1.1 ratchov 349: unsigned int mode, dup, mmc, vol;
350: unsigned int hold, autovol, bufsz, round, rate;
351: const char *str;
352: struct aparams par;
353: struct dev *d;
354: struct port *p;
355: struct listen *l;
1.17 ratchov 356: struct passwd *pw;
1.25 ratchov 357: struct tcpaddr {
358: char *host;
359: struct tcpaddr *next;
360: } *tcpaddr_list, *ta;
1.18 ratchov 361: int s[2];
362: pid_t pid;
1.20 ratchov 363: uid_t euid, hpw_uid, wpw_uid;
364: gid_t hpw_gid, wpw_gid;
365: char *wpw_dir;
1.1 ratchov 366:
367: atexit(log_flush);
368:
369: /*
370: * global options defaults
371: */
372: vol = 118;
373: dup = 1;
374: mmc = 0;
375: hold = 0;
376: autovol = 1;
377: bufsz = 0;
378: round = 0;
379: rate = DEFAULT_RATE;
380: unit = 0;
381: background = 1;
382: pmin = 0;
383: pmax = 1;
384: rmin = 0;
385: rmax = 1;
386: aparams_init(&par);
387: mode = MODE_PLAY | MODE_REC;
1.25 ratchov 388: tcpaddr_list = NULL;
1.1 ratchov 389:
1.15 ratchov 390: 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 391: switch (c) {
392: case 'd':
393: log_level++;
394: background = 0;
395: break;
396: case 'U':
397: unit = strtonum(optarg, 0, 15, &str);
398: if (str)
399: errx(1, "%s: unit number is %s", optarg, str);
400: break;
401: case 'L':
1.25 ratchov 402: ta = xmalloc(sizeof(struct tcpaddr));
403: ta->host = optarg;
404: ta->next = tcpaddr_list;
405: tcpaddr_list = ta;
1.1 ratchov 406: break;
407: case 'm':
408: mode = opt_mode();
409: break;
410: case 'j':
411: dup = opt_onoff();
412: break;
413: case 't':
414: mmc = opt_mmc();
415: break;
416: case 'c':
417: opt_ch(&pmin, &pmax);
418: break;
419: case 'C':
420: opt_ch(&rmin, &rmax);
421: break;
422: case 'e':
423: opt_enc(&par);
424: break;
425: case 'r':
426: rate = strtonum(optarg, RATE_MIN, RATE_MAX, &str);
427: if (str)
428: errx(1, "%s: rate is %s", optarg, str);
429: break;
430: case 'v':
431: vol = strtonum(optarg, 0, MIDI_MAXCTL, &str);
432: if (str)
433: errx(1, "%s: volume is %s", optarg, str);
434: break;
435: case 's':
436: if ((d = dev_list) == NULL) {
1.28 ratchov 437: d = mkdev(DEFAULT_DEV, &par, 0, bufsz, round,
438: rate, hold, autovol);
1.1 ratchov 439: }
1.26 ratchov 440: if (mkopt(optarg, d, pmin, pmax, rmin, rmax,
441: mode, vol, mmc, dup) == NULL)
442: return 1;
1.1 ratchov 443: break;
444: case 'q':
1.27 ratchov 445: mkport(optarg, hold);
1.1 ratchov 446: break;
447: case 'a':
448: hold = opt_onoff();
449: break;
450: case 'w':
451: autovol = opt_onoff();
452: break;
453: case 'b':
454: bufsz = strtonum(optarg, 1, RATE_MAX, &str);
455: if (str)
456: errx(1, "%s: buffer size is %s", optarg, str);
457: break;
458: case 'z':
459: round = strtonum(optarg, 1, SHRT_MAX, &str);
460: if (str)
461: errx(1, "%s: block size is %s", optarg, str);
462: break;
463: case 'f':
1.28 ratchov 464: mkdev(optarg, &par, 0, bufsz, round,
465: rate, hold, autovol);
1.1 ratchov 466: break;
467: default:
468: fputs(usagestr, stderr);
469: return 1;
470: }
471: }
472: argc -= optind;
473: argv += optind;
474: if (argc > 0) {
475: fputs(usagestr, stderr);
476: return 1;
477: }
478: if (dev_list == NULL)
479: mkdev(DEFAULT_DEV, &par, 0, bufsz, round, rate, hold, autovol);
480: for (d = dev_list; d != NULL; d = d->next) {
481: if (opt_byname("default", d->num))
482: continue;
1.26 ratchov 483: if (mkopt("default", d, pmin, pmax, rmin, rmax,
484: mode, vol, mmc, dup) == NULL)
485: return 1;
1.1 ratchov 486: }
1.17 ratchov 487:
488: setsig();
489: filelist_init();
490:
1.20 ratchov 491: euid = geteuid();
492: if (euid == 0) {
493: if ((pw = getpwnam(SNDIO_PRIV_USER)) == NULL)
494: errx(1, "unknown user %s", SNDIO_PRIV_USER);
495: hpw_uid = pw->pw_uid;
1.28 ratchov 496: hpw_gid = pw->pw_gid;
1.20 ratchov 497: if ((pw = getpwnam(SNDIO_USER)) == NULL)
498: errx(1, "unknown user %s", SNDIO_USER);
499: wpw_uid = pw->pw_uid;
1.28 ratchov 500: wpw_gid = pw->pw_gid;
1.20 ratchov 501: wpw_dir = xstrdup(pw->pw_dir);
502: } else {
1.21 ratchov 503: hpw_uid = wpw_uid = hpw_gid = wpw_gid = 0xdeadbeef;
504: wpw_dir = NULL;
1.20 ratchov 505: }
506:
1.18 ratchov 507: /* start subprocesses */
508:
509: if (socketpair(AF_UNIX, SOCK_STREAM, 0, s) < 0) {
510: perror("socketpair");
511: return 1;
1.13 ratchov 512: }
1.18 ratchov 513: pid = fork();
514: if (pid == -1) {
515: log_puts("can't fork\n");
516: return 1;
1.1 ratchov 517: }
1.18 ratchov 518: if (pid == 0) {
519: setproctitle("helper");
520: close(s[0]);
521: if (fdpass_new(s[1], &helper_fileops) == NULL)
1.1 ratchov 522: return 1;
1.18 ratchov 523: if (background) {
524: log_flush();
525: log_level = 0;
526: if (daemon(0, 0) < 0)
527: err(1, "daemon");
528: }
1.20 ratchov 529: if (euid == 0) {
530: if (setgroups(1, &hpw_gid) ||
531: setresgid(hpw_gid, hpw_gid, hpw_gid) ||
532: setresuid(hpw_uid, hpw_uid, hpw_uid))
1.18 ratchov 533: err(1, "cannot drop privileges");
534: }
1.22 ratchov 535: if (pledge("stdio sendfd rpath wpath", NULL) < 0)
536: err(1, "pledge");
1.18 ratchov 537: while (file_poll())
538: ; /* nothing */
539: } else {
540: close(s[1]);
541: if (fdpass_new(s[0], &worker_fileops) == NULL)
1.1 ratchov 542: return 1;
1.18 ratchov 543:
1.31 ! ratchov 544: getbasepath(base);
1.18 ratchov 545: snprintf(path,
546: SOCKPATH_MAX, "%s/" SOCKPATH_FILE "%u",
547: base, unit);
1.23 ratchov 548: if (!listen_new_un(path))
549: return 1;
1.25 ratchov 550: for (ta = tcpaddr_list; ta != NULL; ta = ta->next) {
551: if (!listen_new_tcp(ta->host, AUCAT_PORT + unit))
1.23 ratchov 552: return 1;
553: }
1.18 ratchov 554: for (l = listen_list; l != NULL; l = l->next) {
555: if (!listen_init(l))
556: return 1;
557: }
558:
559: midi_init();
560: for (p = port_list; p != NULL; p = p->next) {
561: if (!port_init(p))
562: return 1;
563: }
564: for (d = dev_list; d != NULL; d = d->next) {
565: if (!dev_init(d))
566: return 1;
567: }
568: if (background) {
569: log_flush();
570: log_level = 0;
571: if (daemon(0, 0) < 0)
572: err(1, "daemon");
573: }
1.20 ratchov 574: if (euid == 0) {
1.18 ratchov 575: if (setpriority(PRIO_PROCESS, 0, SNDIO_PRIO) < 0)
576: err(1, "setpriority");
1.20 ratchov 577: if (chroot(wpw_dir) != 0 || chdir("/") != 0)
578: err(1, "cannot chroot to %s", wpw_dir);
579: if (setgroups(1, &wpw_gid) ||
580: setresgid(wpw_gid, wpw_gid, wpw_gid) ||
581: setresuid(wpw_uid, wpw_uid, wpw_uid))
1.18 ratchov 582: err(1, "cannot drop privileges");
1.22 ratchov 583: }
1.25 ratchov 584: if (tcpaddr_list) {
1.22 ratchov 585: if (pledge("stdio audio recvfd unix inet", NULL) == -1)
586: err(1, "pledge");
587: } else {
588: if (pledge("stdio audio recvfd unix", NULL) == -1)
589: err(1, "pledge");
1.18 ratchov 590: }
591: for (;;) {
592: if (quit_flag)
593: break;
594: if (!fdpass_peer)
595: break;
596: if (!file_poll())
597: break;
598: }
599: if (fdpass_peer)
600: fdpass_close(fdpass_peer);
601: while (listen_list != NULL)
602: listen_close(listen_list);
603: while (sock_list != NULL)
604: sock_close(sock_list);
605: for (d = dev_list; d != NULL; d = d->next)
606: dev_done(d);
607: for (p = port_list; p != NULL; p = p->next)
608: port_done(p);
609: while (file_poll())
610: ; /* nothing */
611: midi_done();
1.1 ratchov 612: }
613: while (opt_list != NULL)
614: opt_del(opt_list);
615: while (dev_list)
616: dev_del(dev_list);
617: while (port_list)
618: port_del(port_list);
1.25 ratchov 619: while (tcpaddr_list) {
620: ta = tcpaddr_list;
621: tcpaddr_list = ta->next;
622: xfree(ta);
623: }
1.1 ratchov 624: filelist_done();
625: unsetsig();
626: return 0;
627: }