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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/sndiod/sndiod.c	Lines:	0	292	0.0 %
Date:	2017-11-13	Branches:	0	237	0.0 %


/*	$OpenBSD: sndiod.c,v 1.32 2016/10/20 05:48:50 ratchov Exp $	*/
/*
 * Copyright (c) 2008-2012 Alexandre Ratchov <alex@caoua.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/resource.h>
#include <sys/socket.h>

#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <grp.h>
#include <limits.h>
#include <pwd.h>
#include <signal.h>
#include <sndio.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "amsg.h"
#include "defs.h"
#include "dev.h"
#include "fdpass.h"
#include "file.h"
#include "listen.h"
#include "midi.h"
#include "opt.h"
#include "sock.h"
#include "utils.h"

/*
 * unprivileged user name
 */
#ifndef SNDIO_USER
#define SNDIO_USER	"_sndio"
#endif

/*
 * privileged user name
 */
#ifndef SNDIO_PRIV_USER
#define SNDIO_PRIV_USER	"_sndiop"
#endif

/*
 * priority when run as root
 */
#ifndef SNDIO_PRIO
#define SNDIO_PRIO	(-20)
#endif

/*
 * sample rate if no ``-r'' is used
 */
#ifndef DEFAULT_RATE
#define DEFAULT_RATE	48000
#endif

/*
 * block size if neither ``-z'' nor ``-b'' is used
 */
#ifndef DEFAULT_ROUND
#define DEFAULT_ROUND	960
#endif

/*
 * buffer size if neither ``-z'' nor ``-b'' is used
 */
#ifndef DEFAULT_BUFSZ
#define DEFAULT_BUFSZ	7680
#endif

/*
 * default device in server mode
 */
#ifndef DEFAULT_DEV
#define DEFAULT_DEV "rsnd/0"
#endif

void sigint(int);
void opt_ch(int *, int *);
void opt_enc(struct aparams *);
int opt_mmc(void);
int opt_onoff(void);
int getword(char *, char **);
unsigned int opt_mode(void);
void getbasepath(char *);
void setsig(void);
void unsetsig(void);
struct dev *mkdev(char *, struct aparams *,
    int, int, int, int, int, int);
struct port *mkport(char *, int);
struct opt *mkopt(char *, struct dev *,
    int, int, int, int, int, int, int, int);

unsigned int log_level = 0;
volatile sig_atomic_t quit_flag = 0;

char usagestr[] = "usage: sndiod [-d] [-a flag] [-b nframes] "
    "[-C min:max] [-c min:max] [-e enc]\n\t"
    "[-f device] [-j flag] [-L addr] [-m mode] [-q port] [-r rate]\n\t"
    "[-s name] [-t mode] [-U unit] [-v volume] [-w flag] [-z nframes]\n";

/*
 * SIGINT handler, it raises the quit flag. If the flag is already set,
 * that means that the last SIGINT was not handled, because the process
 * is blocked somewhere, so exit.
 */
void
sigint(int s)
{
	if (quit_flag)
		_exit(1);
	quit_flag = 1;
}

void
opt_ch(int *rcmin, int *rcmax)
{
	char *next, *end;
	long cmin, cmax;

	errno = 0;
	cmin = strtol(optarg, &next, 10);
	if (next == optarg || *next != ':')
		goto failed;
	cmax = strtol(++next, &end, 10);
	if (end == next || *end != '\0')
		goto failed;
	if (cmin < 0 || cmax < cmin || cmax >= NCHAN_MAX)
		goto failed;
	*rcmin = cmin;
	*rcmax = cmax;
	return;
failed:
	errx(1, "%s: bad channel range", optarg);
}

void
opt_enc(struct aparams *par)
{
	int len;

	len = aparams_strtoenc(par, optarg);
	if (len == 0 || optarg[len] != '\0')
		errx(1, "%s: bad encoding", optarg);
}

int
opt_mmc(void)
{
	if (strcmp("off", optarg) == 0)
		return 0;
	if (strcmp("slave", optarg) == 0)
		return 1;
	errx(1, "%s: off/slave expected", optarg);
}

int
opt_onoff(void)
{
	if (strcmp("off", optarg) == 0)
		return 0;
	if (strcmp("on", optarg) == 0)
		return 1;
	errx(1, "%s: on/off expected", optarg);
}

int
getword(char *word, char **str)
{
	char *p = *str;

	for (;;) {
		if (*word == '\0')
			break;
		if (*word++ != *p++)
			return 0;
	}
	if (*p == ',' || *p == '\0') {
		*str = p;
		return 1;
	}
	return 0;
}

unsigned int
opt_mode(void)
{
	unsigned int mode = 0;
	char *p = optarg;

	for (;;) {
		if (getword("play", &p)) {
			mode |= MODE_PLAY;
		} else if (getword("rec", &p)) {
			mode |= MODE_REC;
		} else if (getword("mon", &p)) {
			mode |= MODE_MON;
		} else if (getword("midi", &p)) {
			mode |= MODE_MIDIMASK;
		} else
			errx(1, "%s: bad mode", optarg);
		if (*p == '\0')
			break;
		p++;
	}
	if (mode == 0)
		errx(1, "empty mode");
	return mode;
}

void
setsig(void)
{
	struct sigaction sa;

	quit_flag = 0;
	sigfillset(&sa.sa_mask);
	sa.sa_flags = SA_RESTART;
	sa.sa_handler = sigint;
	if (sigaction(SIGINT, &sa, NULL) < 0)
		err(1, "sigaction(int) failed");
	if (sigaction(SIGTERM, &sa, NULL) < 0)
		err(1, "sigaction(term) failed");
	if (sigaction(SIGHUP, &sa, NULL) < 0)
		err(1, "sigaction(hup) failed");
}

void
unsetsig(void)
{
	struct sigaction sa;

	sigfillset(&sa.sa_mask);
	sa.sa_flags = SA_RESTART;
	sa.sa_handler = SIG_DFL;
	if (sigaction(SIGHUP, &sa, NULL) < 0)
		err(1, "unsetsig(hup): sigaction failed");
	if (sigaction(SIGTERM, &sa, NULL) < 0)
		err(1, "unsetsig(term): sigaction failed");
	if (sigaction(SIGINT, &sa, NULL) < 0)
		err(1, "unsetsig(int): sigaction failed");
}

void
getbasepath(char *base)
{
	uid_t uid;
	struct stat sb;
	mode_t mask, omask;

	uid = geteuid();
	if (uid == 0) {
		mask = 022;
		snprintf(base, SOCKPATH_MAX, SOCKPATH_DIR);
	} else {
		mask = 077;
		snprintf(base, SOCKPATH_MAX, SOCKPATH_DIR "-%u", uid);
	}
	omask = umask(mask);
	if (mkdir(base, 0777) < 0) {
		if (errno != EEXIST)
			err(1, "mkdir(\"%s\")", base);
	}
	umask(omask);
	if (stat(base, &sb) < 0)
		err(1, "stat(\"%s\")", base);
	if (!S_ISDIR(sb.st_mode))
		errx(1, "%s is not a directory", base);
	if (sb.st_uid != uid || (sb.st_mode & mask) != 0)
		errx(1, "%s has wrong permissions", base);
}

struct dev *
mkdev(char *path, struct aparams *par,
    int mode, int bufsz, int round, int rate, int hold, int autovol)
{
	struct dev *d;

	for (d = dev_list; d != NULL; d = d->next) {
		if (strcmp(d->path, path) == 0)
			return d;
	}
	if (!bufsz && !round) {
		round = DEFAULT_ROUND;
		bufsz = DEFAULT_BUFSZ;
	} else if (!bufsz) {
		bufsz = round * 2;
	} else if (!round)
		round = bufsz / 2;
	d = dev_new(path, par, mode, bufsz, round, rate, hold, autovol);
	if (d == NULL)
		exit(1);
	return d;
}

struct port *
mkport(char *path, int hold)
{
	struct port *c;

	for (c = port_list; c != NULL; c = c->next) {
		if (strcmp(c->path, path) == 0)
			return c;
	}
	c = port_new(path, MODE_MIDIMASK, hold);
	if (c == NULL)
		exit(1);
	return c;
}

struct opt *
mkopt(char *path, struct dev *d,
    int pmin, int pmax, int rmin, int rmax,
    int mode, int vol, int mmc, int dup)
{
	struct opt *o;

	o = opt_new(path, d, pmin, pmax, rmin, rmax,
	    MIDI_TO_ADATA(vol), mmc, dup, mode);
	if (o == NULL)
		return NULL;
	dev_adjpar(d, o->mode, o->pmax, o->rmax);
	return o;
}

static int
start_helper(int background)
{
	struct passwd *pw;
	int s[2];
	pid_t pid;

	if (geteuid() == 0) {
		if ((pw = getpwnam(SNDIO_PRIV_USER)) == NULL)
			errx(1, "unknown user %s", SNDIO_PRIV_USER);
	} else
		pw = NULL;
	if (socketpair(AF_UNIX, SOCK_STREAM, 0, s) < 0) {
		perror("socketpair");
		return 0;
	}
	pid = fork();
	if (pid	== -1) {
		log_puts("can't fork\n");
		return 0;
	}
	if (pid == 0) {
		setproctitle("helper");
		close(s[0]);
		if (fdpass_new(s[1], &helper_fileops) == NULL)
			return 0;
		if (background) {
			log_flush();
			log_level = 0;
			if (daemon(0, 0) < 0)
				err(1, "daemon");
		}
		if (pw != NULL) {
			if (setgroups(1, &pw->pw_gid) ||
			    setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) ||
			    setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid))
				err(1, "cannot drop privileges");
		}
		if (pledge("stdio sendfd rpath wpath flock cpath", NULL) < 0)
			err(1, "pledge");
		while (file_poll())
			; /* nothing */
		exit(0);
	} else {
		close(s[1]);
		if (fdpass_new(s[0], &worker_fileops) == NULL)
			return 0;
	}
	return 1;
}

static void
stop_helper(void)
{
	if (fdpass_peer)
		fdpass_close(fdpass_peer);
}

int
main(int argc, char **argv)
{
	int c, background, unit;
	int pmin, pmax, rmin, rmax;
	char base[SOCKPATH_MAX], path[SOCKPATH_MAX];
	unsigned int mode, dup, mmc, vol;
	unsigned int hold, autovol, bufsz, round, rate;
	const char *str;
	struct aparams par;
	struct dev *d;
	struct port *p;
	struct listen *l;
	struct passwd *pw;
	struct tcpaddr {
		char *host;
		struct tcpaddr *next;
	} *tcpaddr_list, *ta;

	atexit(log_flush);

	/*
	 * global options defaults
	 */
	vol = 118;
	dup = 1;
	mmc = 0;
	hold = 0;
	autovol = 1;
	bufsz = 0;
	round = 0;
	rate = DEFAULT_RATE;
	unit = 0;
	background = 1;
	pmin = 0;
	pmax = 1;
	rmin = 0;
	rmax = 1;
	aparams_init(&par);
	mode = MODE_PLAY | MODE_REC;
	tcpaddr_list = NULL;

	while ((c = getopt(argc, argv, "a:b:c:C:de:f:j:L:m:q:r:s:t:U:v:w:x:z:")) != -1) {
		switch (c) {
		case 'd':
			log_level++;
			background = 0;
			break;
		case 'U':
			unit = strtonum(optarg, 0, 15, &str);
			if (str)
				errx(1, "%s: unit number is %s", optarg, str);
			break;
		case 'L':
			ta = xmalloc(sizeof(struct tcpaddr));
			ta->host = optarg;
			ta->next = tcpaddr_list;
			tcpaddr_list = ta;
			break;
		case 'm':
			mode = opt_mode();
			break;
		case 'j':
			dup = opt_onoff();
			break;
		case 't':
			mmc = opt_mmc();
			break;
		case 'c':
			opt_ch(&pmin, &pmax);
			break;
		case 'C':
			opt_ch(&rmin, &rmax);
			break;
		case 'e':
			opt_enc(&par);
			break;
		case 'r':
			rate = strtonum(optarg, RATE_MIN, RATE_MAX, &str);
			if (str)
				errx(1, "%s: rate is %s", optarg, str);
			break;
		case 'v':
			vol = strtonum(optarg, 0, MIDI_MAXCTL, &str);
			if (str)
				errx(1, "%s: volume is %s", optarg, str);
			break;
		case 's':
			if ((d = dev_list) == NULL) {
				d = mkdev(DEFAULT_DEV, &par, 0, bufsz, round,
				    rate, hold, autovol);
			}
			if (mkopt(optarg, d, pmin, pmax, rmin, rmax,
				mode, vol, mmc, dup) == NULL)
				return 1;
			break;
		case 'q':
			mkport(optarg, hold);
			break;
		case 'a':
			hold = opt_onoff();
			break;
		case 'w':
			autovol = opt_onoff();
			break;
		case 'b':
			bufsz = strtonum(optarg, 1, RATE_MAX, &str);
			if (str)
				errx(1, "%s: buffer size is %s", optarg, str);
			break;
		case 'z':
			round = strtonum(optarg, 1, SHRT_MAX, &str);
			if (str)
				errx(1, "%s: block size is %s", optarg, str);
			break;
		case 'f':
			mkdev(optarg, &par, 0, bufsz, round,
			    rate, hold, autovol);
			break;
		default:
			fputs(usagestr, stderr);
			return 1;
		}
	}
	argc -= optind;
	argv += optind;
	if (argc > 0) {
		fputs(usagestr, stderr);
		return 1;
	}
	if (dev_list == NULL)
		mkdev(DEFAULT_DEV, &par, 0, bufsz, round, rate, hold, autovol);
	for (d = dev_list; d != NULL; d = d->next) {
		if (opt_byname("default", d->num))
			continue;
		if (mkopt("default", d, pmin, pmax, rmin, rmax,
			mode, vol, mmc, dup) == NULL)
			return 1;
	}

	setsig();
	filelist_init();

	if (!start_helper(background))
		return 1;

	if (geteuid() == 0) {
		if ((pw = getpwnam(SNDIO_USER)) == NULL)
			errx(1, "unknown user %s", SNDIO_USER);
	} else
		pw = NULL;
	getbasepath(base);
	snprintf(path, SOCKPATH_MAX, "%s/" SOCKPATH_FILE "%u", base, unit);
	if (!listen_new_un(path))
		return 1;
	for (ta = tcpaddr_list; ta != NULL; ta = ta->next) {
		if (!listen_new_tcp(ta->host, AUCAT_PORT + unit))
			return 1;
	}
	for (l = listen_list; l != NULL; l = l->next) {
		if (!listen_init(l))
			return 1;
	}
	midi_init();
	for (p = port_list; p != NULL; p = p->next) {
		if (!port_init(p))
			return 1;
	}
	for (d = dev_list; d != NULL; d = d->next) {
		if (!dev_init(d))
			return 1;
	}
	if (background) {
		log_flush();
		log_level = 0;
		if (daemon(0, 0) < 0)
			err(1, "daemon");
	}
	if (pw != NULL) {
		if (setpriority(PRIO_PROCESS, 0, SNDIO_PRIO) < 0)
			err(1, "setpriority");
		if (chroot(pw->pw_dir) != 0 || chdir("/") != 0)
			err(1, "cannot chroot to %s", pw->pw_dir);
		if (setgroups(1, &pw->pw_gid) ||
		    setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) ||
		    setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid))
			err(1, "cannot drop privileges");
	}
	if (tcpaddr_list) {
		if (pledge("stdio audio recvfd unix inet flock rpath cpath wpath", NULL) == -1)
			err(1, "pledge");
	} else {
		if (pledge("stdio audio recvfd unix flock rpath cpath wpath", NULL) == -1)
			err(1, "pledge");
	}
	for (;;) {
		if (quit_flag)
			break;
		if (!fdpass_peer)
			break;
		if (!file_poll())
			break;
	}
	stop_helper();
	while (listen_list != NULL)
		listen_close(listen_list);
	while (sock_list != NULL)
		sock_close(sock_list);
	for (d = dev_list; d != NULL; d = d->next)
		dev_done(d);
	for (p = port_list; p != NULL; p = p->next)
		port_done(p);
	while (file_poll())
		; /* nothing */
	midi_done();

	while (opt_list != NULL)
		opt_del(opt_list);
	while (dev_list)
		dev_del(dev_list);
	while (port_list)
		port_del(port_list);
	while (tcpaddr_list) {
		ta = tcpaddr_list;
		tcpaddr_list = ta->next;
		xfree(ta);
	}
	filelist_done();
	unsetsig();
	return 0;
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: sndiod.c,v 1.32 2016/10/20 05:48:50 ratchov Exp $ */
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>
20			#include <sys/socket.h>
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"
38			#include "fdpass.h"
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			/*
54			* privileged user name
55			*/
56			#ifndef SNDIO_PRIV_USER
57			#define SNDIO_PRIV_USER "_sndiop"
58			#endif
59
60			/*
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
85			#define DEFAULT_BUFSZ 7680
86			#endif
87
88			/*
89			* default device in server mode
90			*/
91			#ifndef DEFAULT_DEV
92			#define DEFAULT_DEV "rsnd/0"
93			#endif
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 *);
103			void setsig(void);
104			void unsetsig(void);
105			struct dev mkdev(char , struct aparams *,
106			int, int, int, int, int, int);
107			struct port mkport(char , int);
108			struct opt mkopt(char , struct dev *,
109			int, int, int, int, int, int, int, int);
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
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
202			unsigned int
203			opt_mode(void)
204			{
205			unsigned int mode = 0;
206			char *p = optarg;
207
208			for (;;) {
209			if (getword("play", &p)) {
210			mode \|= MODE_PLAY;
211			} else if (getword("rec", &p)) {
212			mode \|= MODE_REC;
213			} else if (getword("mon", &p)) {
214			mode \|= MODE_MON;
215			} else if (getword("midi", &p)) {
216			mode \|= MODE_MIDIMASK;
217			} else
218			errx(1, "%s: bad mode", optarg);
219			if (*p == '\0')
220			break;
221			p++;
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");
255			if (sigaction(SIGTERM, &sa, NULL) < 0)
256			err(1, "unsetsig(term): sigaction failed");
257			if (sigaction(SIGINT, &sa, NULL) < 0)
258			err(1, "unsetsig(int): sigaction failed");
259			}
260
261			void
262			getbasepath(char *base)
263			{
264			uid_t uid;
265			struct stat sb;
266			mode_t mask, omask;
267
268			uid = geteuid();
269			if (uid == 0) {
270			mask = 022;
271			snprintf(base, SOCKPATH_MAX, SOCKPATH_DIR);
272			} else {
273			mask = 077;
274			snprintf(base, SOCKPATH_MAX, SOCKPATH_DIR "-%u", uid);
275			}
276			omask = umask(mask);
277			if (mkdir(base, 0777) < 0) {
278			if (errno != EEXIST)
279			err(1, "mkdir(\"%s\")", base);
280			}
281			umask(omask);
282			if (stat(base, &sb) < 0)
283			err(1, "stat(\"%s\")", base);
284			if (!S_ISDIR(sb.st_mode))
285			errx(1, "%s is not a directory", base);
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
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
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)
338			return NULL;
339			dev_adjpar(d, o->mode, o->pmax, o->rmax);
340			return o;
341			}
342
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 flock cpath", 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
401			int
402			main(int argc, char **argv)
403			{
404			int c, background, unit;
405			int pmin, pmax, rmin, rmax;
406			char base[SOCKPATH_MAX], path[SOCKPATH_MAX];
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;
414			struct passwd *pw;
415			struct tcpaddr {
416			char *host;
417			struct tcpaddr *next;
418			} tcpaddr_list, ta;
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;
441			tcpaddr_list = NULL;
442
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) {
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':
455			ta = xmalloc(sizeof(struct tcpaddr));
456			ta->host = optarg;
457			ta->next = tcpaddr_list;
458			tcpaddr_list = ta;
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) {
490			d = mkdev(DEFAULT_DEV, &par, 0, bufsz, round,
491			rate, hold, autovol);
492			}
493			if (mkopt(optarg, d, pmin, pmax, rmin, rmax,
494			mode, vol, mmc, dup) == NULL)
495			return 1;
496			break;
497			case 'q':
498			mkport(optarg, hold);
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':
517			mkdev(optarg, &par, 0, bufsz, round,
518			rate, hold, autovol);
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;
536			if (mkopt("default", d, pmin, pmax, rmin, rmax,
537			mode, vol, mmc, dup) == NULL)
538			return 1;
539			}
540
541			setsig();
542			filelist_init();
543
544			if (!start_helper(background))
545			return 1;
546
547			if (geteuid() == 0) {
548			if ((pw = getpwnam(SNDIO_USER)) == NULL)
549			errx(1, "unknown user %s", SNDIO_USER);
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;
559			}
560			for (l = listen_list; l != NULL; l = l->next) {
561			if (!listen_init(l))
562			return 1;
563			}
564			midi_init();
565			for (p = port_list; p != NULL; p = p->next) {
566			if (!port_init(p))
567			return 1;
568			}
569			for (d = dev_list; d != NULL; d = d->next) {
570			if (!dev_init(d))
571			return 1;
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 flock rpath cpath wpath", NULL) == -1)
591			err(1, "pledge");
592			} else {
593			if (pledge("stdio audio recvfd unix flock rpath cpath wpath", 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();
616
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);
623			while (tcpaddr_list) {
624			ta = tcpaddr_list;
625			tcpaddr_list = ta->next;
626			xfree(ta);
627			}
628			filelist_done();
629			unsetsig();
630			return 0;
631			}