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main.c
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/*
* Copyright 2008-2013 Various Authors
* Copyright 2005-2006 Timo Hirvonen
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "misc.h"
#include "prog.h"
#include "file.h"
#include "path.h"
#include "xmalloc.h"
#include "utils.h"
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <errno.h>
static int sock;
static int raw_args = 0;
static char *passwd;
static int read_answer(void)
{
char buf[8192];
int got_nl = 0;
int len = 0;
while (1) {
int rc = read(sock, buf, sizeof(buf));
if (rc < 0) {
warn_errno("read");
break;
}
if (!rc)
die("unexpected EOF\n");
len += rc;
// Last line should be empty (i.e. read "\n" or "...\n\n").
// Write everything but the last \n to stdout.
if (got_nl && buf[0] == '\n')
break;
if (len == 1 && buf[0] == '\n')
break;
if (rc > 1 && buf[rc - 1] == '\n' && buf[rc - 2] == '\n') {
write_all(1, buf, rc - 1);
break;
}
got_nl = buf[rc - 1] == '\n';
write_all(1, buf, rc);
}
return len;
}
static int write_line(const char *line)
{
if (write_all(sock, line, strlen(line)) == -1)
die_errno("write");
return read_answer();
}
static int send_cmd(const char *format, ...)
{
char buf[512];
va_list ap;
va_start(ap, format);
vsnprintf(buf, sizeof(buf), format, ap);
va_end(ap);
return write_line(buf);
}
static int remote_connect(const char *address)
{
union {
struct sockaddr sa;
struct sockaddr_un un;
struct sockaddr_storage sas;
} addr;
size_t addrlen;
if (strchr(address, '/')) {
if (passwd)
warn("password ignored for unix connections\n");
passwd = NULL;
addr.sa.sa_family = AF_UNIX;
strncpy(addr.un.sun_path, address, sizeof(addr.un.sun_path) - 1);
addrlen = sizeof(addr.un);
} else {
const struct addrinfo hints = {
.ai_socktype = SOCK_STREAM
};
const char *port = STRINGIZE(DEFAULT_PORT);
struct addrinfo *result;
char *s = strrchr(address, ':');
int rc;
if (!passwd)
die("password required for tcp/ip connection\n");
if (s) {
*s++ = 0;
port = s;
}
rc = getaddrinfo(address, port, &hints, &result);
if (rc != 0)
die("getaddrinfo: %s\n", gai_strerror(rc));
memcpy(&addr.sa, result->ai_addr, result->ai_addrlen);
addrlen = result->ai_addrlen;
freeaddrinfo(result);
}
sock = socket(addr.sa.sa_family, SOCK_STREAM, 0);
if (sock == -1)
die_errno("socket");
if (connect(sock, &addr.sa, addrlen)) {
if (errno == ENOENT || errno == ECONNREFUSED) {
/* "cmus-remote -C" can be used to check if cmus is running */
if (!raw_args)
warn("cmus is not running\n");
exit(1);
}
die_errno("connect");
}
if (passwd)
return send_cmd("passwd %s\n", passwd) == 1;
return 1;
}
static char *file_url_absolute(const char *str)
{
char *absolute;
if (strncmp(str, "http://", 7) == 0)
return xstrdup(str);
absolute = path_absolute(str);
if (absolute == NULL)
die_errno("get_current_dir_name");
return absolute;
}
enum flags {
FLAG_SERVER,
FLAG_PASSWD,
FLAG_HELP,
FLAG_VERSION,
FLAG_PLAY,
FLAG_PAUSE,
FLAG_PAUSE_PLAYBACK,
FLAG_STOP,
FLAG_NEXT,
FLAG_PREV,
FLAG_FILE,
FLAG_REPEAT,
FLAG_SHUFFLE,
FLAG_VOLUME,
FLAG_SEEK,
FLAG_QUERY,
FLAG_LIBRARY,
FLAG_PLAYLIST,
FLAG_QUEUE,
FLAG_CLEAR,
FLAG_RAW
#define NR_FLAGS (FLAG_RAW + 1)
};
static struct option options[NR_FLAGS + 1] = {
{ 0, "server", 1 },
{ 0, "passwd", 1 },
{ 0, "help", 0 },
{ 0, "version", 0 },
{ 'p', "play", 0 },
{ 'u', "pause", 0 },
{ 'U', "pause-playback", 0 },
{ 's', "stop", 0 },
{ 'n', "next", 0 },
{ 'r', "prev", 0 },
{ 'f', "file", 1 },
{ 'R', "repeat", 0 },
{ 'S', "shuffle", 0 },
{ 'v', "volume", 1 },
{ 'k', "seek", 1 },
{ 'Q', "query", 0 },
{ 'l', "library", 0 },
{ 'P', "playlist", 0 },
{ 'q', "queue", 0 },
{ 'c', "clear", 0 },
{ 'C', "raw", 0 },
{ 0, NULL, 0 }
};
static int flags[NR_FLAGS] = { 0, };
static const char *usage =
"Usage: %s [OPTION]... [FILE|DIR|PLAYLIST]...\n"
" or: %s -C COMMAND...\n"
" or: %s\n"
"Control cmus through socket.\n"
"\n"
" --server ADDR connect using ADDR instead of $CMUS_SOCKET or $XDG_RUNTIME_DIR/cmus-socket\n"
" ADDR is either a UNIX socket or host[:port]\n"
" WARNING: using TCP/IP is insecure!\n"
" --passwd PASSWD password to use for TCP/IP connection\n"
" --help display this help and exit\n"
" --version " VERSION "\n"
"\n"
"Cooked mode:\n"
" -p, --play player-play\n"
" -u, --pause player-pause\n"
" -U, --pause-playback player-pause-playback\n"
" -s, --stop player-stop\n"
" -n, --next player-next\n"
" -r, --prev player-prev\n"
" -f, --file player-play FILE\n"
" -R, --repeat toggle repeat\n"
" -S, --shuffle toggle shuffle\n"
" -v, --volume VOL vol VOL\n"
" -k, --seek SEEK seek SEEK\n"
" -Q, --query get player status (same as -C status)\n"
"\n"
" -l, --library modify library instead of playlist\n"
" -P, --playlist modify playlist (default)\n"
" -q, --queue modify play queue instead of playlist\n"
" -c, --clear clear playlist, library (-l) or play queue (-q)\n"
"\n"
" Add FILE/DIR/PLAYLIST to playlist, library (-l) or play queue (-q).\n"
"\n"
"Raw mode:\n"
" -C, --raw treat arguments (instead of stdin) as raw commands\n"
"\n"
" By default cmus-remote reads raw commands from stdin (one command per line).\n"
"\n"
"Report bugs to <cmus-devel@lists.sourceforge.net>.\n";
int main(int argc, char *argv[])
{
char *server = NULL;
char *play_file = NULL;
char *volume = NULL;
char *seek = NULL;
int query = 0;
int i, nr_cmds = 0;
int context = 'p';
program_name = argv[0];
argv++;
while (1) {
int idx;
char *arg;
idx = get_option(&argv, options, &arg);
if (idx < 0)
break;
flags[idx] = 1;
switch ((enum flags)idx) {
case FLAG_HELP:
printf(usage, program_name, program_name, program_name);
return 0;
case FLAG_VERSION:
printf("cmus " VERSION
"\nCopyright 2004-2006 Timo Hirvonen"
"\nCopyright 2008-2016 Various Authors\n");
return 0;
case FLAG_SERVER:
server = arg;
break;
case FLAG_PASSWD:
passwd = arg;
break;
case FLAG_VOLUME:
volume = arg;
nr_cmds++;
break;
case FLAG_SEEK:
seek = arg;
nr_cmds++;
break;
case FLAG_QUERY:
query = 1;
nr_cmds++;
break;
case FLAG_FILE:
play_file = arg;
nr_cmds++;
break;
case FLAG_LIBRARY:
context = 'l';
break;
case FLAG_PLAYLIST:
context = 'p';
break;
case FLAG_QUEUE:
context = 'q';
break;
case FLAG_PLAY:
case FLAG_PAUSE:
case FLAG_PAUSE_PLAYBACK:
case FLAG_STOP:
case FLAG_NEXT:
case FLAG_PREV:
case FLAG_REPEAT:
case FLAG_SHUFFLE:
case FLAG_CLEAR:
nr_cmds++;
break;
case FLAG_RAW:
raw_args = 1;
break;
}
}
if (nr_cmds && raw_args)
die("don't mix raw and cooked stuff\n");
misc_init();
if (server == NULL)
server = xstrdup(cmus_socket_path);
if (!remote_connect(server))
return 1;
if (raw_args) {
while (*argv)
send_cmd("%s\n", *argv++);
return 0;
}
if (nr_cmds == 0 && argv[0] == NULL) {
char line[512];
while (fgets(line, sizeof(line), stdin))
write_line(line);
return 0;
}
if (flags[FLAG_CLEAR])
send_cmd("clear -%c\n", context);
for (i = 0; argv[i]; i++) {
char *filename = file_url_absolute(argv[i]);
send_cmd("add -%c %s\n", context, filename);
free(filename);
}
if (flags[FLAG_REPEAT])
send_cmd("toggle repeat\n");
if (flags[FLAG_SHUFFLE])
send_cmd("toggle shuffle\n");
if (flags[FLAG_STOP])
send_cmd("player-stop\n");
if (flags[FLAG_NEXT])
send_cmd("player-next\n");
if (flags[FLAG_PREV])
send_cmd("player-prev\n");
if (flags[FLAG_PLAY])
send_cmd("player-play\n");
if (flags[FLAG_PAUSE])
send_cmd("player-pause\n");
if (flags[FLAG_PAUSE_PLAYBACK])
send_cmd("player-pause-playback\n");
if (flags[FLAG_FILE])
send_cmd("player-play %s\n", file_url_absolute(play_file));
if (volume)
send_cmd("vol %s\n", volume);
if (seek)
send_cmd("seek %s\n", seek);
if (query)
send_cmd("status\n");
return 0;
}