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/*
KDM remote control application
Copyright (C) 2004 Oswald Buddenhagen <ossi@kde.org>
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, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <ctype.h>
#include <sys/socket.h>
#include <sys/un.h>
static int
openctl( int fd, int err, const char *ctl, const char *dpy )
{
struct sockaddr_un sa;
sa.sun_family = AF_UNIX;
if (dpy)
snprintf( sa.sun_path, sizeof(sa.sun_path),
"%s/dmctl-%s/socket", ctl, dpy );
else
snprintf( sa.sun_path, sizeof(sa.sun_path),
"%s/dmctl/socket", ctl );
if (!connect( fd, (struct sockaddr *)&sa, sizeof(sa) ))
return 1;
if (err)
fprintf( stderr, "Cannot connect socket '%s'.\n", sa.sun_path );
return 0;
}
static const char *
readcfg( const char *cfg )
{
FILE *fp;
const char *ctl;
char *ptr, *ptr2;
char buf[1024];
if (!(fp = fopen( cfg, "r" ))) {
fprintf( stderr,
"Cannot open kdm config file '%s'.\n",
cfg );
return 0;
}
ctl = "/var/run/xdmctl";
while (fgets( buf, sizeof(buf), fp ))
if (!strncmp( buf, "FifoDir", 7 )) {
ptr = buf + 7;
while (*ptr && isspace( *ptr ))
ptr++;
if (*ptr++ != '=')
continue;
while (*ptr && isspace( *ptr ))
ptr++;
for (ptr2 = buf + strlen( buf );
ptr2 > ptr && isspace( *(ptr2 - 1) );
ptr2--);
*ptr2 = 0;
ctl = strdup( ptr );
break;
}
fclose( fp );
return ctl;
}
static int
exe( int fd, const char *in, int len )
{
char buf[4096];
if (write( fd, in, len ) != len) {
fprintf( stderr, "Cannot send command\n" );
return 1;
}
if ((len = read( fd, buf, sizeof(buf) )) <= 0) {
fprintf( stderr, "Cannot receive reply\n" );
return 1;
}
if (len == sizeof(buf) && buf[sizeof(buf) - 1] != '\n')
fprintf( stderr, "Warning: reply is too long\n" );
fwrite( buf, 1, len, stdout );
if (len == sizeof(buf) && buf[sizeof(buf) - 1] != '\n')
puts( "[...]" );
return 0;
}
static int
run( int fd, char **argv )
{
unsigned len, l;
char buf[1024];
if (!*argv)
return exe( fd, "caps\n", 5 );
if (!strcmp( *argv, "-" )) {
for (;;) {
if (isatty( 0 )) {
fputs( "> ", stdout );
fflush( stdout );
}
if (!fgets( buf, sizeof(buf), stdin ))
return 0;
if (exe( fd, buf, strlen( buf ) ))
return 1;
}
} else {
len = strlen( *argv );
if (len >= sizeof(buf))
goto bad;
memcpy( buf, *argv, len );
while (*++argv) {
l = strlen( *argv );
if (len + l + 1 >= sizeof(buf))
goto bad;
buf[len++] = '\t';
memcpy( buf + len, *argv, l );
len += l;
}
buf[len++] = '\n';
return exe( fd, buf, len );
bad:
fprintf( stderr, "Command too long\n" );
return 1;
}
}
int
main( int argc, char **argv )
{
char *dpy = getenv( "DISPLAY" );
const char *ctl = getenv( "DM_CONTROL" );
const char *cfg = KDE_CONFDIR "/kdm/kdmrc";
char *ptr;
int fd;
(void)argc;
while (*++argv) {
ptr = *argv;
if (*ptr != '-' || !*(ptr + 1))
break;
ptr++;
if (*ptr == '-')
ptr++;
if (!strcmp( ptr, "h" ) || !strcmp( ptr, "help" )) {
puts(
"Usage: kdmctl [options] [command [command arguments]]\n"
"\n"
"Options are:\n"
" -h -help This help message.\n"
" -g -global Use global control socket even if $DISPLAY is set\n"
" -d -display Override $DISPLAY\n"
" -s -sockets Override $DM_CONTROL\n"
" -c -config Use alternative kdm config file\n"
"\n"
"The directory in which the sockets are located is determined this way:\n"
"- the -s option is examined\n"
"- the $DM_CONTROL variable is examined\n"
"- the kdm config file is searched for the FifoDir key\n"
"- /var/run/xdmctl and /var/run are tried\n"
"\n"
"If $DISPLAY is set (or -d was specified) and -g was not specified, the\n"
"display-specific control socket will be used, otherwise the global one.\n"
"\n"
"Tokens in the command and the reply are tab-separated.\n"
"Command arguments can be specified as separate command line parameters,\n"
"in which case they are simply concatenated with tabs in between.\n"
"\n"
"If the command is '-', kdmctl reads commands from stdin.\n"
"The default command is 'caps'.\n"
);
return 0;
} else if (!strcmp( ptr, "g" ) || !strcmp( ptr, "global" ))
dpy = 0;
else if (!strcmp( ptr, "d" ) || !strcmp( ptr, "display" )) {
if (!argv[1])
goto needarg;
dpy = *++argv;
} else if (!strcmp( ptr, "s" ) || !strcmp( ptr, "sockets" )) {
if (!argv[1])
goto needarg;
ctl = *++argv;
} else if (!strcmp( ptr, "c" ) || !strcmp( ptr, "config" )) {
if (!argv[1]) {
needarg:
fprintf( stderr, "Option '%s' needs argument.\n",
ptr );
return 1;
}
cfg = *++argv;
} else {
fprintf( stderr, "Unknown option '%s'.\n", ptr );
return 1;
}
}
if ((!ctl || !*ctl) && *cfg)
ctl = readcfg( cfg );
if ((fd = socket( PF_UNIX, SOCK_STREAM, 0 )) < 0) {
fprintf( stderr, "Cannot create UNIX socket\n" );
return 1;
}
if (dpy && (ptr = strchr( dpy, ':' )) && (ptr = strchr( ptr, '.' )))
*ptr = 0;
if (ctl && *ctl) {
if (!openctl( fd, 1, ctl, dpy ))
return 1;
} else {
if (!openctl( fd, 0, "/var/run/xdmctl", dpy ) &&
!openctl( fd, 0, "/var/run", dpy ))
{
fprintf( stderr, "No command socket found.\n" );
return 1;
}
}
return run( fd, argv );
}
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