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#include "config.h"
#include "esd.h"
#include "genrand.h"
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <dirent.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <time.h>
#include <signal.h>
#include <string.h>
#include <netdb.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <errno.h>
#include <sys/wait.h>
#include <poll.h>
#include <sys/un.h>
#ifndef SUN_LEN
#define SUN_LEN(ptr) ((size_t) (((struct sockaddr_un *) 0)->sun_path) \
+ strlen ((ptr)->sun_path))
#endif
/*******************************************************************/
/* prototypes */
int esd_set_socket_buffers( int sock, int src_format,
int src_rate, int base_rate );
static void dummy_signal(int signum);
/* dummy handler */
static void dummy_signal(int signum) {
signal( signum, dummy_signal);
return;
}
/* from esd_config.c */
extern char esd_spawn_options[];
extern int esd_no_spawn;
extern int esd_spawn_wait_ms;
void esd_config_read(void);
/*******************************************************************/
/* alternate implementations */
#ifndef HAVE_INET_PTON
#ifndef HAVE_INET_ATON
int inet_aton(const char *cp, struct in_addr *inp)
{
union {
unsigned int n;
char parts[4];
} u;
int a=0,b=0,c=0,d=0, i;
i = sscanf(cp, "%d.%d.%d.%d%*s", &a, &b, &c, &d);
if(i != 4)
return 0;
u.parts[0] = a;
u.parts[1] = b;
u.parts[2] = c;
u.parts[3] = d;
inp->s_addr = u.n;
return 1;
}
#endif
#endif
static ssize_t
read_timeout (int fd, char *buf, size_t buflen)
{
struct pollfd pfd[1];
int flags, rv;
ssize_t n;
pfd[0].fd = fd;
pfd[0].events = POLLIN;
do {
pfd[0].revents = 0;
rv = poll (pfd, 1, 100);
} while (rv == -1 && (errno == EINTR || errno == EAGAIN));
if (rv < 1 || !(pfd[0].revents & POLLIN)) {
errno = ETIMEDOUT;
return -1;
}
if ((flags = fcntl (fd, F_GETFL)) == -1)
return -1;
fcntl (fd, F_SETFL, flags | O_NONBLOCK);
do {
n = read (fd, buf, buflen);
} while (n == -1 && errno == EINTR);
if (n == -1) {
rv = errno;
fcntl (fd, F_SETFL, flags);
errno = rv;
return -1;
}
fcntl (fd, F_SETFL, flags);
return n;
}
static ssize_t
write_timeout (int fd, const char *buf, size_t buflen)
{
struct pollfd pfd[1];
size_t nwritten = 0;
int flags, rv;
ssize_t n;
if ((flags = fcntl (fd, F_GETFL)) == -1)
return -1;
fcntl (fd, F_SETFL, flags | O_NONBLOCK);
do {
pfd[0].fd = fd;
pfd[0].events = POLLOUT;
do {
pfd[0].revents = 0;
rv = poll (pfd, 1, 100);
} while (rv == -1 && (errno == EINTR || errno == EAGAIN));
if (rv < 1 || (pfd[0].revents & (POLLERR | POLLHUP | POLLOUT)) != POLLOUT) {
fcntl (fd, F_SETFL, flags);
errno = ETIMEDOUT;
return -1;
}
do {
n = write (fd, buf + nwritten, buflen - nwritten);
} while (n == -1 && errno == EINTR);
if (n == -1) {
rv = errno;
fcntl (fd, F_SETFL, flags);
errno = rv;
return -1;
}
nwritten += n;
} while (nwritten < buflen);
fcntl (fd, F_SETFL, flags);
return nwritten;
}
/**
* esd_set_socket_buffers: set buffer lengths on a socket to optimal.
* @sock: ESD socket
* @src_format: data format
* @src_rate: sample rate for this stream
* @base_rate: sample rate that server is running at.
*
* Sets send and receive buffer lengths to optimal length for audio data
* transfer.
*
* Return Value: Size that buffers were set to.
*/
int esd_set_socket_buffers( int sock, int src_format,
int src_rate, int base_rate )
{
int buf_size = ESD_BUF_SIZE;
if ( src_rate > 0 ) buf_size = ( buf_size * base_rate ) / src_rate;
if ( ( src_format & ESD_MASK_BITS ) == ESD_BITS16 )
buf_size *= 2;
if ( ! ( ( src_format & ESD_MASK_CHAN ) == ESD_MONO ) )
buf_size *= 2;
setsockopt( sock, SOL_SOCKET, SO_SNDBUF, &buf_size, sizeof( buf_size ) );
setsockopt( sock, SOL_SOCKET, SO_RCVBUF, &buf_size, sizeof( buf_size ) );
return buf_size;
}
/**
* esd_get_latency: get stream latency
* @esd: ESD socket
*
* Get the stream latency to esound (latency is number of samples
* at 44.1khz stereo 16 bit - you'll have to adjust if your input
* sampling rate is less (in bytes per second))
*
* Return Value: Latency, in number of samples at 44.1khz stereo 16 bit.
*/
int esd_get_latency(int esd)
{
int lag = 0;
int proto = ESD_PROTO_LATENCY;
void (*phandler)(int);
/* this is unavoidable - in case ESD "disappears" (ie the socket conn dies) */
/* we need to catch SIGPIPE to avoid the default handler giving us */
/* a bad day - ignore the SIGPIPE, then make sure to catch all errors */
phandler = signal( SIGPIPE, dummy_signal ); /* for closed esd conns */
/* send the necessary information */
if ( write_timeout( esd, (const char *) &proto, sizeof(proto) ) != sizeof(proto) ) {
signal( SIGPIPE, phandler );
return -1;
}
/* get the latency back from the server */
if ( read_timeout( esd, (char *) &lag, sizeof(lag) ) != sizeof(lag) ) {
signal( SIGPIPE, phandler );
return -1;
}
/* diagnostic info */
/*
if ( getenv( "ESDBG" ) )
printf( "esound getting latency\n" );
*/
/* return the sample id to the client */
signal( SIGPIPE, phandler );
lag += ESD_BUF_SIZE * 2;
return lag;
}
/**
* esd_send_auth: send authorization to esd
* @sock: ESD socket
*
* Send the authorization cookie, creating a new one if needed.
*
* Return Value: -1 on error, 0 if authorization was refused by server,
* 1 if authorization was accepted.
**/
int esd_send_auth( int sock )
{
int auth_fd = -1;
int endian = ESD_ENDIAN_KEY;
int reply;
char *auth_filename = NULL;
unsigned char auth_key[ESD_KEY_LEN];
const char *home = NULL;
int namelen, retval;
void (*phandler)(int);
/* this is unavoidable - in case ESD "disappears" (ie the socket conn dies) */
/* we need to catch SIGPIPE to avoid the default handler giving us */
/* a bad day - ignore the SIGPIPE, then make sure to catch all errors */
phandler = signal( SIGPIPE, dummy_signal ); /* for closed esd conns */
/* assemble the authorization filename */
home = getenv( "HOME" );
if ( !home ) {
fprintf( stderr, "HOME environment variable not set?\n" );
signal( SIGPIPE, phandler );
return -1;
}
namelen = strlen(home) + sizeof("/.esd_auth");
if ((auth_filename = malloc(namelen + 1)) == 0) {
fprintf( stderr, "Memory exhausted\n" );
signal( SIGPIPE, phandler );
return -1;
}
strcpy( auth_filename, home );
strcat( auth_filename, "/.esd_auth" );
retval = 0;
/* open the authorization file */
if ( -1 == (auth_fd = open( auth_filename, O_RDONLY ) ) ) {
/* it doesn't exist? create one */
auth_fd = open( auth_filename, O_RDWR | O_CREAT | O_EXCL,
S_IRUSR | S_IWUSR );
if ( -1 == auth_fd ) {
/* coun't even create it? bail */
perror( auth_filename );
goto exit_fn;
}
esound_genrand(auth_key, ESD_KEY_LEN);
write_timeout( auth_fd, (const char *) auth_key, ESD_KEY_LEN);
} else {
/* read the key from the authorization file */
if ( ESD_KEY_LEN != read_timeout( auth_fd, (char *) auth_key, ESD_KEY_LEN ) )
goto exit_fd;
}
/* send the key to the server */
if ( ESD_KEY_LEN != write_timeout( sock, (const char *) auth_key, ESD_KEY_LEN ) )
/* send key failed */
goto exit_fd;
/* send the key to the server */
if ( sizeof(endian) != write_timeout( sock, (const char *) &endian, sizeof(endian) ) )
/* send key failed */
goto exit_fd;
/* read auth reply. esd will reply 1 as an int for yes and 0 for no */
/* then close the connection */
if ( sizeof(reply) != read_timeout( sock, (char *) &reply, sizeof(reply) ) ) {
/* read ok failed */
retval = 0;
goto exit_fd;
}
/* we got a reply and it's no - so esd will close the socket now */
/* on us anyway... time to return invalid auth... */
if (reply == 0) {
/* auth failed */
retval = 0;
goto exit_fd;
}
/* we've run the gauntlet, everything's ok, proceed as usual */
/* fsync( sock ); */
retval = 1;
exit_fd:
close( auth_fd );
exit_fn:
free( auth_filename );
signal( SIGPIPE, phandler );
return retval;
}
/**
* esd_lock: disable foreign clients
* @esd: ESD socket
*
* Locks the ESD on the end of the specified socket, so that it will not
* accept connections from untrusted clients - eg, clients which do not
* present the appropriate key.
*
* Counterpart to esd_unlock().
*
* Return Value: -1 on error, 0 if failed, otherwise success.
*/
int esd_lock( int esd ) {
int proto = ESD_PROTO_LOCK;
int ok = 0;
void (*phandler)(int);
/* this is unavoidable - in case ESD "disappears" (ie the socket conn dies) */
/* we need to catch SIGPIPE to avoid the default handler giving us */
/* a bad day - ignore the SIGPIPE, then make sure to catch all errors */
phandler = signal( SIGPIPE, dummy_signal ); /* for closed esd conns */
/* diagnostic info */
/*
if ( getenv( "ESDBG" ) )
printf( "esound locking\n" );
*/
write_timeout( esd, (const char *) &proto, sizeof(proto) );
esd_send_auth( esd );
if ( read_timeout( esd, (char *) &ok, sizeof(ok) ) != sizeof(ok) ) {
signal( SIGPIPE, phandler );
return -1;
}
signal( SIGPIPE, phandler );
return ok;
}
/**
* esd_unlock: disable foreign clients
* @esd: ESD socket
*
* Unlocks the ESD on the end of the specified socket, so that it will
* accept connections from untrusted clients - eg, clients which do not
* present the appropriate key.
*
* Counterpart to esd_lock().
*
* Return Value: -1 on error, 0 if failed, otherwise success.
*/
int esd_unlock( int esd ){
int proto = ESD_PROTO_UNLOCK;
int ok = 0;
void (*phandler)(int);
/* this is unavoidable - in case ESD "disappears" (ie the socket conn dies) */
/* we need to catch SIGPIPE to avoid the default handler giving us */
/* a bad day - ignore the SIGPIPE, then make sure to catch all errors */
phandler = signal( SIGPIPE, dummy_signal ); /* for closed esd conns */
/* diagnostic info */
/*
if ( getenv( "ESDBG" ) )
printf( "esound unlocking\n" );
*/
write_timeout( esd, (const char *) &proto, sizeof(proto) );
esd_send_auth( esd );
if ( read_timeout( esd, (char *) &ok, sizeof(ok) ) != sizeof(ok) ) {
signal( SIGPIPE, phandler );
return -1;
}
signal( SIGPIPE, phandler );
return ok;
}
/**
* esd_standby: release audio device
* @esd: ESD socket
*
* Causes the ESD on the end of the specified socket to stop playing sounds
* and release its connection to the audio device so that other processes
* may use it.
*
* Counterpart to esd_resume().
*
* Return Value: -1 on error, 0 if failed, otherwise success.
*/
int esd_standby( int esd )
{
int proto = ESD_PROTO_STANDBY;
int ok = 0;
void (*phandler)(int);
/* this is unavoidable - in case ESD "disappears" (ie the socket conn dies) */
/* we need to catch SIGPIPE to avoid the default handler giving us */
/* a bad day - ignore the SIGPIPE, then make sure to catch all errors */
phandler = signal( SIGPIPE, dummy_signal ); /* for closed esd conns */
/* diagnostic info */
/*
if ( getenv( "ESDBG" ) )
printf( "esound standing by\n" );
*/
write_timeout( esd, (const char *) &proto, sizeof(proto) );
esd_send_auth( esd );
if ( read_timeout( esd, (char *) &ok, sizeof(ok) ) != sizeof(ok) ) {
signal( SIGPIPE, phandler );
return -1;
}
signal( SIGPIPE, phandler );
return ok;
}
/**
* esd_resume: reclaim audio device
* @esd: ESD socket
*
* Causes the ESD on the end of the specified socket to attempt to reconnect
* to the audio device and start playing sounds again.
*
* Counterpart to esd_standby().
*
* Return Value: -1 on error, 0 if failed, otherwise success.
*/
int esd_resume( int esd )
{
int proto = ESD_PROTO_RESUME;
int ok = 0;
void (*phandler)(int);
/* this is unavoidable - in case ESD "disappears" (ie the socket conn dies) */
/* we need to catch SIGPIPE to avoid the default handler giving us */
/* a bad day - ignore the SIGPIPE, then make sure to catch all errors */
phandler = signal( SIGPIPE, dummy_signal ); /* for closed esd conns */
/* diagnostic info */
/*
if ( getenv( "ESDBG" ) )
printf( "esound resuming\n" );
*/
write_timeout( esd, (const char *) &proto, sizeof(proto) );
esd_send_auth( esd );
if ( read_timeout( esd, (char *) &ok, sizeof(ok) ) != sizeof(ok) ) {
signal( SIGPIPE, phandler );
return -1;
}
signal( SIGPIPE, phandler );
return ok;
}
static int
connect_timeout (int sockfd, const struct sockaddr *serv_addr, size_t addrlen, int timeout)
{
struct pollfd pfd[1];
int flags, rv;
if ((flags = fcntl (sockfd, F_GETFL)) == -1)
return -1;
fcntl (sockfd, F_SETFL, flags | O_NONBLOCK);
if (connect (sockfd, serv_addr, addrlen) == 0) {
fcntl (sockfd, F_SETFL, flags);
return 0;
}
if (errno != EINPROGRESS)
return -1;
pfd[0].fd = sockfd;
pfd[0].events = POLLIN | POLLOUT;
do {
pfd[0].revents = 0;
rv = poll (pfd, 1, timeout);
} while (rv == -1 && errno == EINTR);
if (pfd[0].revents & (POLLIN | POLLOUT)) {
/* success, we are now connected */
fcntl (sockfd, F_SETFL, flags);
return 0;
}
/* took too long / error connecting, either way: epic fail */
return -1;
}
/**
* esd_connect_tcpip: make a TCPIP connection to ESD
* @host: specifies hostname and port to connect to as "hostname:port"
* Both parts are optional, the default being to connect to localhost on
* ESD_DEFAULT_PORT. This default is used if host is NULL.
*
* Attempts to make a connection to ESD using TCPIP.
* Similar to esd_connect_unix().
*
* Return Value: -1 on error, else a socket number connected to ESD.
*/
static int
esd_connect_tcpip(const char *host)
{
const char *espeaker = NULL;
struct hostent *he;
struct sockaddr_in socket_addr;
int socket_out = -1;
int curstate = 1;
char default_host[] = "127.0.0.1";
char connect_host[64];
int port = ESD_DEFAULT_PORT;
#if defined (ENABLE_IPV6)
if ( have_ipv6() ) {
int cnt, i;
char *loc;
struct addrinfo hints, *result = NULL, *res;
memset (&hints, 0, sizeof (hints));
hints.ai_socktype = SOCK_STREAM;
connect_host[0] = '\0';
if ( host ) {
char *host_dup;
char *s;
host_dup = strdup (host);
if (!host_dup) {
fprintf(stderr, "Out of memory\n");
return -1;
}
s = host_dup;
cnt = 0;
for ( i = 0; i < strlen (s); i++ )
if ( s[i] == ':' )
cnt++;
if (( cnt == 1 ) && ((loc = strchr (s, ':')) != NULL)) {
*loc = '\0';
strcpy (connect_host, s);
port = atoi (loc + 1);
}
else {
if (( cnt != 0 ) && ((loc = strchr (s, ']')) != NULL )) {
*loc = '\0';
strcpy ( connect_host, ++s );
port = atoi ( loc + 2 );
}
else
strcpy ( connect_host, s );
}
free (host_dup);
}
if( port == 0 )
port = ESD_DEFAULT_PORT;
if ( !strlen ( connect_host ) )
strcpy ( connect_host, "localhost" );
if ( getaddrinfo ( connect_host, NULL, &hints, &result ) != 0 ) {
printf ("Usage:program_name [address][:port]");
return (-1);
}
for ( res = result; res ;res = res->ai_next ) {
if ( res->ai_family != AF_INET && res->ai_family != AF_INET6 )
continue;
if ( res->ai_family == AF_INET )
((struct sockaddr_in *)res->ai_addr)->sin_port = htons(port);
if ( res->ai_family == AF_INET6 )
((struct sockaddr_in6 *)res->ai_addr)->sin6_port = htons(port);
socket_out = socket ( res->ai_family, SOCK_STREAM, 0 );
if ( socket_out < 0 ) {
fprintf (stderr,"Unable to create TCP socket\n");
goto error_out;
}
/* this was borrowed blindly from the Tcl socket stuff */
if ( fcntl( socket_out, F_SETFD, FD_CLOEXEC ) < 0 ) {
fprintf(stderr,"Unable to set socket to non-blocking\n");
goto error_out;
}
if ( setsockopt( socket_out, SOL_SOCKET, SO_REUSEADDR,
&curstate, sizeof(curstate) ) < 0 ) {
fprintf(stderr,"Unable to set for a fresh socket\n");
goto error_out;
}
if ( connect_timeout ( socket_out, res->ai_addr, res->ai_addrlen, 1000 ) != -1 )
break;
close ( socket_out );
}
freeaddrinfo ( result );
if (!res) /* Couldn't connect to any address */
return -1;
}
else
#endif
{
unsigned int host_div = 0;
memset (&socket_addr, 0, sizeof (socket_addr));
memset (&he, 0, sizeof (he));
/* see if we have a remote speaker to play to */
espeaker = host;
if ( espeaker && *espeaker ) {
strncpy(connect_host, espeaker, sizeof(connect_host));
/* split the espeaker host into host:port */
host_div = strcspn( connect_host, ":" );
if(host_div > 0 && host_div < strlen(espeaker)) {
connect_host[ host_div ] = '\0';
}
else if ( host_div == 0)
strcpy( connect_host, default_host );
connect_host[sizeof(connect_host) - 1] = '\0';
/* Resolving the host name */
if ( ( he = gethostbyname( connect_host ) ) == NULL ) {
fprintf( stderr, "Can\'t resolve host name \"%s\"!\n",
connect_host);
return(-1);
}
memcpy( (struct in_addr *) &socket_addr.sin_addr, he->h_addr,
sizeof( struct in_addr ) );
/* get port */
if ( host_div < strlen( espeaker ) )
port = atoi( espeaker + host_div + 1 );
if ( !port )
port = ESD_DEFAULT_PORT;
/* printf( "(remote) host is %s : %d\n", connect_host, port ); */
}
#ifdef HAVE_INET_PTON
else if( !inet_pton(AF_INET, default_host, &socket_addr.sin_addr ) ) {
#else
else if( !inet_aton( default_host, &socket_addr.sin_addr ) ) {
#endif
fprintf( stderr, "couldn't convert %s to inet address\n",
default_host );
return -1;
}
/* create the socket, and set for non-blocking */
socket_out = socket( AF_INET, SOCK_STREAM, 0 );
if ( socket_out < 0 )
{
fprintf(stderr,"Unable to create TCP socket\n");
goto error_out;
}
/* this was borrowed blindly from the Tcl socket stuff */
if ( fcntl( socket_out, F_SETFD, FD_CLOEXEC ) < 0 )
{
fprintf(stderr,"Unable to set socket to non-blocking\n");
goto error_out;
}
if ( setsockopt( socket_out, SOL_SOCKET, SO_REUSEADDR,
&curstate, sizeof(curstate) ) < 0 )
{
fprintf(stderr,"Unable to set for a fresh socket\n");
goto error_out;
}
/* set the connect information */
socket_addr.sin_family = AF_INET;
socket_addr.sin_port = htons( port );
if ( connect_timeout ( socket_out,
(struct sockaddr *) &socket_addr,
sizeof(struct sockaddr_in), 1000 ) < 0 )
goto error_out;
}
return socket_out;
error_out:
if( socket_out >= 0 )
close( socket_out );
return -1;
}
/**
* esd_connect_unix: make a local UNIX socket connection to ESD
*
* Attempts to make a connection to ESD using local UNIX sockets.
* Similar to esd_connect_tcpip().
*
* Return Value: -1 on error, else a socket number connected to ESD.
*/
static int
esd_connect_unix(void)
{
struct sockaddr_un socket_unix;
int socket_out = -1;
int curstate = 1;
/* create the socket, and set for non-blocking */
socket_out = socket( AF_UNIX, SOCK_STREAM, 0 );
if ( socket_out < 0 )
{
fprintf(stderr,"Unable to create socket\n");
goto error_out;
}
/* this was borrowed blindly from the Tcl socket stuff */
if ( fcntl( socket_out, F_SETFD, FD_CLOEXEC ) < 0 )
{
fprintf(stderr,"Unable to set socket to close-on-exec\n");
goto error_out;
}
if ( setsockopt( socket_out, SOL_SOCKET, SO_REUSEADDR,
&curstate, sizeof(curstate) ) < 0 )
{
fprintf(stderr,"Unable to set for a fresh socket\n");
goto error_out;
}
/* set the connect information */
socket_unix.sun_family = AF_UNIX;
strncpy(socket_unix.sun_path, ESD_UNIX_SOCKET_NAME, sizeof(socket_unix.sun_path));
if ( connect_timeout ( socket_out, (struct sockaddr *) &socket_unix, SUN_LEN(&socket_unix), 100 ) < 0 )
goto error_out;
return socket_out;
error_out:
if(socket_out >= 0)
close(socket_out);
return -1;
}
static int is_host_local(const char* host)
{
char hnbuf[256]="";
if (!host || !*host) return 1;
gethostname(hnbuf, sizeof(hnbuf));
return (!strcasecmp(host,hnbuf) || !strcasecmp(host, "localhost"));
}
/**
* esd_open_sound: open a connection to ESD and get authorization
* @host: Specifies hostname and port to connect to as "hostname:port"
* Both parts are optional, the default being to connect to localhost on
* ESD_DEFAULT_PORT. This default is used if host is NULL.
*
* Attempts to make a connection to ESD on specified host, or the
* host specified by the $ESPEAKER environment variable if @host is NULL,
* or localhost if $ESPEAKER not set.
*
* Will attempt to connect via UNIX sockets if the host is localhost, and by
* TCPIP otherwise, or if UNIX sockets fail.
*
* If neither of these connection methods succeed, and we are attempting to
* contact the localhost, will attempt to spawn a local copy of ESD (unless
* configured not to in esd.conf), and will then try to connect to that
* using UNIX sockets.
*
* Once a connection is created, we attempt to give ESD the necessary
* authorisation keys to do things - only if this succeeds will the socket
* be given to the caller.
*
* Return Value: -1 on error, else a socket number connected and authorized
* to ESD.
*/
#define min(a,b) ( ( (a)<(b) ) ? (a) : (b) )
int esd_open_sound( const char *rhost )
{
int socket_out = -1;
int len;
char use_unix = 0;
char display_host[ 256 ];
const char *display;
char *host = NULL;
if ( rhost )
host = strdup(rhost);
else {
char *espeaker = getenv("ESPEAKER");
if ( espeaker )
host = strdup(espeaker);
}
display = getenv( "DISPLAY" );
if ( !(host && *host) && display ) {
/* no espeaker specified, but the app should be directed to a
remote display, so try routing the default port over there
and see if we strike gold */
len = strcspn( display, ":" );
if ( len ) {
len = min( len, 255 );
strncpy( display_host, display, len );
display_host[ len ] = '\0';
if ( host ) free(host);
host = strdup(display_host);
}
}
if ( is_host_local(host) ) {
if ( access( ESD_UNIX_SOCKET_NAME, R_OK | W_OK ) == -1 )
use_unix = 0;
else
use_unix = 1;
}
if ( use_unix )
socket_out = esd_connect_unix();
if ( socket_out >= 0 ) goto finish_connect;
socket_out = esd_connect_tcpip( host );
if ( socket_out >= 0 ) goto finish_connect;
#ifndef __EMX__ /* Still in work */
/* Connections failed, period. Since nobody gave us a remote esd
to use, let's try spawning one. */
/* ebm - I think this is an Inherently Bad Idea, but will leave it
alone until I can get a good look at it */
if( is_host_local(host)) {
int childpid;
fd_set fdset;
struct timeval timeout;
int ret;
int esd_pipe[2];
esd_config_read();
if (esd_no_spawn) goto finish_connect;
/* All this hackery so we can stop thrashing around if esd startup fails */
/* there's something inherently flaky about this, and if
there's no audio device, Bad Things Happen */
/* do not bother trying if esd does not exist */
if (access(SERVERDIR"/esd", X_OK) != 0)
goto finish_connect;
if (pipe (esd_pipe) < 0)
goto finish_connect;
childpid = fork();
if(!childpid) {
char *preload2;
char *lib;
char *cmd;
/* child process */
close (esd_pipe[0]);
/*
* pull libesddsp out of LD_PRELOAD if it is there
*/
preload2 = getenv("LD_PRELOAD");
if (preload2)
while ((lib = strstr(preload2,"libesddsp"))) {
char *preload = preload2;
char *start = preload;
char *end = preload+strcspn(preload," \t\n\0");
int length;
while(end < lib) {
start = end+1;
end = start+strcspn(start,"\t\n\0");
}
length = (preload+strlen(preload))-(end+1);
preload2 = malloc(11+(start-preload)+length);
strcpy(preload2, "LD_PRELOAD=");
strncat(preload2, preload, start-preload);
strncat(preload2, end+1, length);
putenv(preload2);
}
cmd = malloc(strlen(SERVERDIR"/esd -spawnfd 9999999999") + strlen(esd_spawn_options));
sprintf(cmd, "%s/esd %s -spawnfd %d", SERVERDIR, esd_spawn_options, esd_pipe[1]);
if(!fork()) {
/* child of child process. Minimal so startup overhead is
* not included in the waiting time
*/
setsid();
execl("/bin/sh", "/bin/sh", "-c", cmd, NULL);
perror("execl");
_exit(1);
} else
_exit(0);
/* children end here */
} else {
int estat;
close(esd_pipe[1]);
while ((waitpid (childpid, &estat, 0)== -1) && (errno == EINTR));
}
/* Wait for spawning to happen. Time taken is system and load
* dependent, so read from config file.
*/
FD_ZERO (&fdset);
FD_SET (esd_pipe[0], &fdset);
timeout.tv_sec = (esd_spawn_wait_ms * 1000) / 1000000;
timeout.tv_usec = (esd_spawn_wait_ms * 1000) % 1000000;
ret = select (esd_pipe[0] + 1, &fdset, NULL, NULL, &timeout);
if (ret == 1) {
char c;
ret = read_timeout (esd_pipe[0], &c, 1);
if (ret == 1) {
socket_out = esd_connect_unix();
if (socket_out < 0)
socket_out = esd_connect_tcpip(host);
}
}
close (esd_pipe[0]);
}
#endif
finish_connect:
if (socket_out >= 0
&& !esd_send_auth (socket_out)) {
close(socket_out); socket_out = -1;
}
if ( host ) free(host);
return socket_out;
}
/**
* esd_play_stream: get socket for playing a stream
* @format: data format for this stream
* @rate: sample rate for this stream
* @host: host to connect to, as for esd_open_sound().
* @name: name used to identify this stream to ESD. (Use NULL if you
* don't care what name you're given - but its generally more useful to give
* something helpful, such as your process name and id.)
*
* Creates a new connection to ESD, using esd_open_sound(), and sets it up
* for playing a stream of audio data, at sample rate @rate,
*
* Return Value: -1 on error, else an ESD socket number set up so that
* any data sent to the socket will be played by the ESD.
*/
int esd_play_stream( esd_format_t format, int rate,
const char *host, const char *name )
{
int sock;
int proto = ESD_PROTO_STREAM_PLAY;
char name_buf[ ESD_NAME_MAX ];
void (*phandler)(int);
/* connect to the EsounD server */
sock = esd_open_sound( host );
if ( sock < 0 )
return sock;
/* prepare the name buffer */
if ( name )
strncpy( name_buf, name, ESD_NAME_MAX );
else
name_buf[ 0 ] = '\0';
/* this is unavoidable - in case ESD "disappears" (ie the socket conn dies) */
/* we need to catch SIGPIPE to avoid the default handler giving us */
/* a bad day - ignore the SIGPIPE, then make sure to catch all errors */
phandler = signal( SIGPIPE, dummy_signal ); /* for closed esd conns */
/* send the audio format information */
if ( write_timeout( sock, (const char *) &proto, sizeof(proto) ) != sizeof(proto) ) {
signal( SIGPIPE, phandler );
return -1;
}
if ( write_timeout( sock, (const char *) &format, sizeof(format) ) != sizeof(format) ) {
signal( SIGPIPE, phandler );
return -1;
}
if( write_timeout( sock, (const char *) &rate, sizeof(rate) ) != sizeof(rate) ) {
signal( SIGPIPE, phandler );
return -1;
}
if( write_timeout( sock, name_buf, ESD_NAME_MAX ) != ESD_NAME_MAX ) {
signal( SIGPIPE, phandler );
return -1;
}
/* Reduce buffers on sockets to the minimum needed */
esd_set_socket_buffers( sock, format, rate, 44100 );
/* flush the socket */
/* fsync( sock ); */
/* diagnostic info */
/*
if ( getenv( "ESDBG" ) )
printf( "esound playing stream\n" );
*/
signal( SIGPIPE, phandler );
return sock;
}
/**
* esd_play_stream_fallback: as esd_play_stream() but connect directly if no ESD
* @format: data format for this stream
* @rate: sample rate for this stream
* @host: host to connect to, as for esd_open_sound().
* @name: name used to to identify this stream to ESD.
*
* Attempts to create a connection to an ESD, using esd_play_stream(), and if
* this fails falls back to trying to contact the soundcard directly.
* (This will not work unless the soundcard is local.)
*
* Return Value: -1 on error, else a socket number set up so that
* any data sent to the socket will be played, either by an ESD or by an.
*/
int esd_play_stream_fallback( esd_format_t format, int rate,
const char *host, const char *name )
{
int socket_out;
/* try to open a connection to the server */
if(!host) host = getenv("ESPEAKER");
socket_out = esd_play_stream( format, rate, host, name );
if ( socket_out >= 0 )
return socket_out;
/* if host is set, this is an error, bail out */
if ( host )
return -1;
/* go for /dev/dsp */
esd_audio_format = format;
esd_audio_rate = rate;
socket_out = esd_audio_open();
/* diagnostic info */
/*
if ( getenv( "ESDBG" ) )
printf( "esound playing stream fallback\n" );
*/
/* we either got it, or we didn't */
return socket_out;
}
/**
* esd_monitor_stream: get socket for monitoring an ESD
* @format: data format for this stream
* @rate: sample rate for this stream
* @host: host to connect to, as for esd_open_sound().
* @name: name used to identify this stream to ESD.
*
* Creates a new connection to ESD, using esd_open_sound(), and sets it up
* for monitoring the output from the ESD.
*
* Return Value: -1 on error, else an ESD socket number set up so that
* any data played by the ESD will be sent to the socket.
*/
int esd_monitor_stream( esd_format_t format, int rate,
const char *host, const char *name )
{
int sock;
int proto = ESD_PROTO_STREAM_MON;
char name_buf[ ESD_NAME_MAX ];
void (*phandler)(int);
/* connect to the EsounD server */
sock = esd_open_sound( host );
if ( sock < 0 )
return sock;
/* prepare the name buffer */
if ( name )
strncpy( name_buf, name, ESD_NAME_MAX );
else
name_buf[ 0 ] = '\0';
/* this is unavoidable - in case ESD "disappears" (ie the socket conn dies) */
/* we need to catch SIGPIPE to avoid the default handler giving us */
/* a bad day - ignore the SIGPIPE, then make sure to catch all errors */
phandler = signal( SIGPIPE, dummy_signal ); /* for closed esd conns */
/* send the audio format information */
if ( write_timeout( sock, (const char *) &proto, sizeof(proto) ) != sizeof(proto) ) {
signal( SIGPIPE, phandler );
return -1;
}
if ( write_timeout( sock, (const char *) &format, sizeof(format) ) != sizeof(format) ) {
signal( SIGPIPE, phandler );
return -1;
}
if( write_timeout( sock, (const char *) &rate, sizeof(rate) ) != sizeof(rate) ) {
signal( SIGPIPE, phandler );
return -1;
}
if( write_timeout( sock, name_buf, ESD_NAME_MAX ) != ESD_NAME_MAX ) {
signal( SIGPIPE, phandler );
return -1;
}
/* Reduce buffers on sockets to the minimum needed */
esd_set_socket_buffers( sock, format, rate, 44100 );
/* flush the socket */
/* fsync( sock ); */
/* diagnostic info */
/*
if ( getenv( "ESDBG" ) )
printf( "esound monitoring stream\n" );
*/
signal( SIGPIPE, phandler );
return sock;
}
/**
* esd_filter_stream: get socket for filtering sound produced by an ESD
* @format: data format for this stream
* @rate: sample rate for this stream
* @host: host to connect to, as for esd_open_sound().
* @name: name used to identify this stream to ESD.
*
* Creates a new connection to ESD, using esd_open_sound(), and sets it up
* for filtering the output from the ESD.
*
* Reading from the stream will give a block of audio data, which is the
* mixed output of the ESD formatted as specified by the function parameters.
* The filter is free to process this data as it likes, but must then write
* an identically sized block of data back to the stream. The data so
* returned is played by the ESD (possibly after applying more filters to
* it.)
*
* The new filter will be placed at the head of the list of filters ie, it
* will receive data for processing first, and the next filter will receive
* the resultant processed data.
*
* Return Value: -1 on error, else an ESD socket number set up so that
* any data played by the ESD will be sent to the socket.
*/
int esd_filter_stream( esd_format_t format, int rate,
const char *host, const char *name )
{
int sock;
int proto = ESD_PROTO_STREAM_FILT;
char name_buf[ ESD_NAME_MAX ];
void (*phandler)(int);
/* connect to the EsounD server */
sock = esd_open_sound( host );
if ( sock < 0 )
return sock;
/* prepare the name buffer */
if ( name )
strncpy( name_buf, name, ESD_NAME_MAX );
else
name_buf[ 0 ] = '\0';
/* this is unavoidable - in case ESD "disappears" (ie the socket conn dies) */
/* we need to catch SIGPIPE to avoid the default handler giving us */
/* a bad day - ignore the SIGPIPE, then make sure to catch all errors */
phandler = signal( SIGPIPE, dummy_signal ); /* for closed esd conns */
/* send the audio format information */
if ( write_timeout( sock, (const char *) &proto, sizeof(proto) ) != sizeof(proto) ) {
signal( SIGPIPE, phandler );
return -1;
}
if ( write_timeout( sock, (const char *) &format, sizeof(format) ) != sizeof(format) ) {
signal( SIGPIPE, phandler );
return -1;
}
if( write_timeout( sock, (const char *) &rate, sizeof(rate) ) != sizeof(rate) ) {
signal( SIGPIPE, phandler );
return -1;
}
if( write_timeout( sock, name_buf, ESD_NAME_MAX ) != ESD_NAME_MAX ) {
signal( SIGPIPE, phandler );
return -1;
}
/* Reduce buffers on sockets to the minimum needed */
esd_set_socket_buffers( sock, format, rate, 44100 );
/* flush the socket */
/* fsync( sock ); */
/* diagnostic info */
/*
if ( getenv( "ESDBG" ) )
printf( "esound filterng stream\n" );
*/
signal( SIGPIPE, phandler );
return sock;
}
/**
* esd_record_stream: get socket for recording via an ESD
* @format: data format for this stream
* @rate: sample rate for this stream
* @host: host to connect to, as for esd_open_sound().
* @name: name used to identify this stream to ESD.
*
* Creates a new connection to ESD, using esd_open_sound(), and sets it up
* for recording data from the soundcard via the ESD.
*
* Return Value: -1 on error, else a socket number to which the external
* audio data arriving at the appropriate soundcard will be sent.
*/
int esd_record_stream( esd_format_t format, int rate,
const char *host, const char *name )
{
int sock;
int proto = ESD_PROTO_STREAM_REC;
char name_buf[ ESD_NAME_MAX ];
void (*phandler)(int);
/* connect to the EsounD server */
sock = esd_open_sound( host );
if ( sock < 0 )
return sock;
/* prepare the name buffer */
if ( name )
strncpy( name_buf, name, ESD_NAME_MAX );
else
name_buf[ 0 ] = '\0';
/* this is unavoidable - in case ESD "disappears" (ie the socket conn dies) */
/* we need to catch SIGPIPE to avoid the default handler giving us */
/* a bad day - ignore the SIGPIPE, then make sure to catch all errors */
phandler = signal( SIGPIPE, dummy_signal ); /* for closed esd conns */
/* send the audio format information */
if ( write_timeout( sock, (const char *) &proto, sizeof(proto) ) != sizeof(proto) ) {
signal( SIGPIPE, phandler );
return -1;
}
if ( write_timeout( sock, (const char *) &format, sizeof(format) ) != sizeof(format) ) {
signal( SIGPIPE, phandler );
return -1;
}
if( write_timeout( sock, (const char *) &rate, sizeof(rate) ) != sizeof(rate) ) {
signal( SIGPIPE, phandler );
return -1;
}
if( write_timeout( sock, name_buf, ESD_NAME_MAX ) != ESD_NAME_MAX ) {
signal( SIGPIPE, phandler );
return -1;
}
/* Reduce buffers on sockets to the minimum needed */
esd_set_socket_buffers( sock, format, rate, 44100 );
/* flush the socket */
/* fsync( sock ); */
/* diagnostic info */
/*
if ( getenv( "ESDBG" ) )
printf( "esound recording stream\n" );
*/
signal( SIGPIPE, phandler );
return sock;
}
/**
* esd_record_stream_fallback: esd_record_stream() but connect direct if no ESD
* @format: data format for this stream
* @rate: sample rate for this stream
* @host: host to connect to, as for esd_open_sound().
* @name: name used to identify this stream to ESD.
*
* Attempts to create a connection to an ESD, using esd_record_stream(), and if
* this fails falls back to trying to contact the soundcard directly.
* (This will not work unless the soundcard is local.)
*
* Return Value: -1 on error, else a socket number to which the external
* audio data arriving at the appropriate soundcard will be sent.
*/
int esd_record_stream_fallback( esd_format_t format, int rate,
const char *host, const char *name )
{
int socket_out;
/* try to open a connection to the server */
if (!host) host = getenv("ESPEAKER");
socket_out = esd_record_stream( format, rate, host, name );
if ( socket_out >= 0 )
return socket_out;
/* if ESPEAKER is set, this is an error, bail out */
if ( host )
return -1;
/* go for /dev/dsp */
esd_audio_format = format;
esd_audio_rate = rate;
socket_out = esd_audio_open();
/* Reduce buffers on sockets to the minimum needed */
esd_set_socket_buffers( socket_out, format, rate, 44100 );
/* diagnostic info */
/*
if ( getenv( "ESDBG" ) )
printf( "esound recording stream fallback\n" );
*/
/* we either got it, or we didn't */
return socket_out;
}
/**
* esd_sample_cache: Cache sample in server
* @esd: server to cache the data in
* @format: data format for this stream
* @rate: sampling rate of the sample
* @size: size of the sample
* @name: name of the sample being cached
*
* Caches a sample in the server.
*
* Return value: ID of the sample cached, or -1 on error.
*/
int esd_sample_cache( int esd, esd_format_t format, const int rate,
const int size, const char *name )
{
int id = 0;
int proto = ESD_PROTO_SAMPLE_CACHE;
void (*phandler)(int);
/* prepare the name buffer */
char name_buf[ ESD_NAME_MAX ];
if ( name )
strncpy( name_buf, name, ESD_NAME_MAX );
else
name_buf[ 0 ] = '\0';
/* printf( "caching sample: %s (%d) - %ld bytes\n",
name_buf, esd, size ); */
/* this is unavoidable - in case ESD "disappears" (ie the socket conn dies) */
/* we need to catch SIGPIPE to avoid the default handler giving us */
/* a bad day - ignore the SIGPIPE, then make sure to catch all errors */
phandler = signal( SIGPIPE, dummy_signal ); /* for closed esd conns */
/* send the necessary information */
if ( write_timeout( esd, (const char *) &proto, sizeof(proto) ) != sizeof(proto) ) {
signal( SIGPIPE, phandler );
return -1;
}
if ( write_timeout( esd, (const char *) &format, sizeof(format) ) != sizeof(format) ) {
signal( SIGPIPE, phandler );
return -1;
}
if ( write_timeout( esd, (const char *) &rate, sizeof(rate) ) != sizeof(rate) ) {
signal( SIGPIPE, phandler );
return -1;
}
if ( write_timeout( esd, (const char *) &size, sizeof(size) ) != sizeof(size) ) {
signal( SIGPIPE, phandler );
return -1;
}
if ( write_timeout( esd, name_buf, ESD_NAME_MAX ) != ESD_NAME_MAX ) {
signal( SIGPIPE, phandler );
return -1;
}
/* flush the socket */
/* fsync( esd ); */
/* get the sample id back from the server */
if ( read_timeout( esd, (char *) &id, sizeof(id) ) != sizeof(id) ) {
signal( SIGPIPE, phandler );
return -1;
}
/* diagnostic info */
/*
if ( getenv( "ESDBG" ) )
printf( "esound caching sample\n" );
*/
/* return the sample id to the client */
signal( SIGPIPE, phandler );
return id;
}
/*******************************************************************/
/* call this after sending the sample data to the server, should */
/* return the same sample id read previously, <= 0 is error */
int esd_confirm_sample_cache( int esd )
{
int id = 0;
void (*phandler)(int);
/* this is unavoidable - in case ESD "disappears" (ie the socket conn dies) */
/* we need to catch SIGPIPE to avoid the default handler giving us */
/* a bad day - ignore the SIGPIPE, then make sure to catch all errors */
phandler = signal( SIGPIPE, dummy_signal ); /* for closed esd conns */
/* get the sample id back from the server */
if ( read_timeout( esd, (char *) &id, sizeof(id) ) != sizeof(id) ) {
signal( SIGPIPE, phandler );
return -1;
}
/* diagnostic info */
/*
if ( getenv( "ESDBG" ) )
printf( "esound confirming cached sample\n" );
*/
/* return the sample id to the client */
signal( SIGPIPE, phandler );
return id;
}
/*******************************************************************/
/* get the sample ID for an already-cached sample */
int esd_sample_getid( int esd, const char *name)
{
int proto = ESD_PROTO_SAMPLE_GETID;
int id;
char namebuf[ESD_NAME_MAX];
void (*phandler)(int);
/* this is unavoidable - in case ESD "disappears" (ie the socket conn dies) */
/* we need to catch SIGPIPE to avoid the default handler giving us */
/* a bad day - ignore the SIGPIPE, then make sure to catch all errors */
phandler = signal( SIGPIPE, dummy_signal ); /* for closed esd conns */
if ( write_timeout( esd, (const char *) &proto, sizeof(proto) ) != sizeof(proto) ) {
signal( SIGPIPE, phandler );
return -1;
}
/* prepare the name buffer */
if ( name )
strncpy( namebuf, name, ESD_NAME_MAX );
else
namebuf[ 0 ] = '\0';
if ( write_timeout( esd, namebuf, ESD_NAME_MAX ) != ESD_NAME_MAX ) {
signal( SIGPIPE, phandler );
return -1;
}
/* flush the socket */
/* fsync( esd ); */
/* get the sample id back from the server */
if ( read_timeout( esd, (char *) &id, sizeof(id) ) != sizeof(id) ) {
signal( SIGPIPE, phandler );
return -1;
}
/* diagnostic info */
/*
if ( getenv( "ESDBG" ) )
printf( "esound getting cached sample id: \'%s\' = %d\n",
name, id );
*/
/* return the sample id to the client */
signal( SIGPIPE, phandler );
return id;
}
/*******************************************************************/
/* remove a sample from the cache in the server */
int esd_sample_free( int esd, int sample )
{
int id;
int proto = ESD_PROTO_SAMPLE_FREE;
void (*phandler)(int);
/* printf( "freeing sample (%d) - <%d>\n", esd, sample ); */
/* this is unavoidable - in case ESD "disappears" (ie the socket conn dies) */
/* we need to catch SIGPIPE to avoid the default handler giving us */
/* a bad day - ignore the SIGPIPE, then make sure to catch all errors */
phandler = signal( SIGPIPE, dummy_signal ); /* for closed esd conns */
/* send the necessary information */
if ( write_timeout( esd, (const char *) &proto, sizeof(proto) ) != sizeof(proto) ) {
signal( SIGPIPE, phandler );
return -1;
}
if ( write_timeout( esd, (const char *) &sample, sizeof(sample) ) != sizeof(sample) ) {
signal( SIGPIPE, phandler );
return -1;
}
/* fsync( esd ); */
/* get the sample id back from the server */
if ( read_timeout( esd, (char *) &id, sizeof(id) ) != sizeof(id) ) {
signal( SIGPIPE, phandler );
return -1;
}
/* diagnostic info */
/*
if ( getenv( "ESDBG" ) )
printf( "esound freeing sample\n" );
*/
/* return the id to the client (0 = error, 1 = ok) */
signal( SIGPIPE, phandler );
return id;
}
/*******************************************************************/
/* play a sample */
int esd_sample_play( int esd, int sample )
{
int is_ok;
int proto = ESD_PROTO_SAMPLE_PLAY;
void (*phandler)(int);
/* printf( "playing sample (%d) - <%d>\n", esd, sample ); */
/* this is unavoidable - in case ESD "disappears" (ie the socket conn dies) */
/* we need to catch SIGPIPE to avoid the default handler giving us */
/* a bad day - ignore the SIGPIPE, then make sure to catch all errors */
phandler = signal( SIGPIPE, dummy_signal ); /* for closed esd conns */
/* send the necessary information */
if ( write_timeout( esd, (const char *) &proto, sizeof(proto) ) != sizeof(proto) ) {
signal( SIGPIPE, phandler );
return -1;
}
if ( write_timeout( esd, (const char *) &sample, sizeof(sample) ) != sizeof(sample) ) {
signal( SIGPIPE, phandler );
return -1;
}
#ifdef __EMX__ /* Some strange troubles without this one */
fsync( esd );
#endif
/* get the sample id back from the server */
if ( read_timeout( esd, (char *) &is_ok, sizeof(is_ok) ) != sizeof(is_ok) ) {
signal( SIGPIPE, phandler );
return -1;
}
/* diagnostic info */
/*
if ( getenv( "ESDBG" ) )
printf( "esound playing sample\n" );
*/
/* return the id to the client (0 = error, 1 = ok) */
signal( SIGPIPE, phandler );
return is_ok;
}
/*******************************************************************/
/* loop a previously cached sample in the server */
int esd_sample_loop( int esd, int sample )
{
int is_ok;
int proto = ESD_PROTO_SAMPLE_LOOP;
void (*phandler)(int);
/* printf( "looping sample (%d) - <%d>\n", esd, sample ); */
/* this is unavoidable - in case ESD "disappears" (ie the socket conn dies) */
/* we need to catch SIGPIPE to avoid the default handler giving us */
/* a bad day - ignore the SIGPIPE, then make sure to catch all errors */
phandler = signal( SIGPIPE, dummy_signal ); /* for closed esd conns */
/* send the necessary information */
if ( write_timeout( esd, (const char *) &proto, sizeof(proto) ) != sizeof(proto) ) {
signal( SIGPIPE, phandler );
return -1;
}
if ( write_timeout( esd, (const char *) &sample, sizeof(sample) ) != sizeof(sample) ) {
signal( SIGPIPE, phandler );
return -1;
}
/* fsync( esd ); */
/* get the sample id back from the server */
if ( read_timeout( esd, (char *) &is_ok, sizeof(is_ok) ) != sizeof(is_ok) ) {
signal( SIGPIPE, phandler );
return -1;
}
/* diagnostic info */
/*
if ( getenv( "ESDBG" ) )
printf( "esound looping sample\n" );
*/
/* return the id to the client (0 = error, 1 = ok) */
signal( SIGPIPE, phandler );
return is_ok;
}
/*******************************************************************/
/* stop a looping sample in the server */
int esd_sample_stop( int esd, int sample )
{
int is_ok;
int proto = ESD_PROTO_SAMPLE_STOP;
void (*phandler)(int);
/* printf( "stopping sample (%d) - <%d>\n", esd, sample ); */
/* this is unavoidable - in case ESD "disappears" (ie the socket conn dies) */
/* we need to catch SIGPIPE to avoid the default handler giving us */
/* a bad day - ignore the SIGPIPE, then make sure to catch all errors */
phandler = signal( SIGPIPE, dummy_signal ); /* for closed esd conns */
/* send the necessary information */
if ( write_timeout( esd, (const char *) &proto, sizeof(proto) ) != sizeof(proto) ) {
signal( SIGPIPE, phandler );
return -1;
}
if ( write_timeout( esd, (const char *) &sample, sizeof(sample) ) != sizeof(sample) ) {
signal( SIGPIPE, phandler );
return -1;
}
/* fsync( esd ); */
/* get the sample id back from the server */
if ( read_timeout( esd, (char *) &is_ok, sizeof(is_ok) ) != sizeof(is_ok) ) {
signal( SIGPIPE, phandler );
return -1;
}
/* diagnostic info */
/*
if ( getenv( "ESDBG" ) )
printf( "esound stopping sample\n" );
*/
/* return the id to the client (0 = error, 1 = ok) */
signal( SIGPIPE, phandler );
return is_ok;
}
/*******************************************************************/
/* stop a looping sample in the server */
int esd_sample_kill( int esd, int sample )
{
int is_ok;
int proto = ESD_PROTO_SAMPLE_KILL;
void (*phandler)(int);
/* printf( "killing sample (%d) - <%d>\n", esd, sample ); */
/* this is unavoidable - in case ESD "disappears" (ie the socket conn dies) */
/* we need to catch SIGPIPE to avoid the default handler giving us */
/* a bad day - ignore the SIGPIPE, then make sure to catch all errors */
phandler = signal( SIGPIPE, dummy_signal ); /* for closed esd conns */
/* send the necessary information */
if ( write_timeout( esd, (const char *) &proto, sizeof(proto) ) != sizeof(proto) ) {
signal( SIGPIPE, phandler );
return -1;
}
if ( write_timeout( esd, (const char *) &sample, sizeof(sample) ) != sizeof(sample) ) {
signal( SIGPIPE, phandler );
return -1;
}
/* fsync( esd ); */
/* get the sample id back from the server */
if ( read_timeout( esd, (char *) &is_ok, sizeof(is_ok) ) != sizeof(is_ok) ) {
signal( SIGPIPE, phandler );
return -1;
}
/* diagnostic info */
/*
if ( getenv( "ESDBG" ) )
printf( "esound stopping sample\n" );
*/
/* return the id to the client (0 = error, 1 = ok) */
signal( SIGPIPE, phandler );
return is_ok;
}
/*******************************************************************/
/* closes fd, previously obtained by esd_open */
int esd_close( int esd )
{
/* diagnostic info */
/*
if ( getenv( "ESDBG" ) )
printf( "esound closing\n" );
*/
return close( esd );
}
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