long _fork( const char *cmd, size_t len )
{
char buff[256];
char *argv[4];
char *shell;
pid_t pid;
int i;
char iov[10];
shell = getenv( "SHELL" );
if( shell == NULL ) shell = "/bin/sh";
argv[0] = shell;
if( len != 0 ) {
argv[1] = "-c";
memcpy( buff, cmd, len );
buff[len] = NULLCHAR;
argv[2] = buff;
argv[3] = NULL;
} else {
argv[1] = NULL;
}
/* make sure STDIN/STDOUT/STDERR are connected to a terminal */
iov[0] = DbgConHandle;
iov[1] = DbgConHandle;
iov[2] = DbgConHandle;
for( i = 3; i < 10; ++i ) iov[i] = (char)-1;
fcntl( DbgConHandle, F_SETFD, (int)0 );
pid = qnx_spawn( 0, 0, 0, -1, -1,
_SPAWN_NEWPGRP | _SPAWN_TCSETPGRP | _SPAWN_SETSID,
shell, argv, environ, iov, DbgConHandle );
fcntl( DbgConHandle, F_SETFD, (int)FD_CLOEXEC );
if( pid == -1 ) return( 0xffff0000 | errno );
do {
} while( waitpid( pid, NULL, 0 ) == -1 && errno == EINTR );
return( 0 );
}
static bool TryXWindows( void )
{
char xqsh_name[CMD_LEN];
int pip[2];
char buff[64];
char **argv;
int len;
char *p;
char *end;
unsigned argc;
/* we're in the X Windows (or helper)environment */
if( pipe( pip ) != 0 ) {
StartupErr( "unable to create console control channel" );
}
fcntl( pip[0], F_SETFD, (int)FD_CLOEXEC );
searchenv( "qnxterm", "PATH", xqsh_name );
if( xqsh_name[0] == NULLCHAR ) {
StartupErr( "qnxterm executable not in PATH" );
}
argc = 0;
p = XConfig;
for( ;; ) {
while( isspace( *p ) )
++p;
while( !isspace( *p ) && *p != NULLCHAR )
++p;
if( *p == NULLCHAR )
break;
++argc;
*p++ = NULLCHAR;
}
end = p;
_AllocA( argv, (argc + 10) * sizeof( *argv ) );
argv[0] = xqsh_name;
argv[1] = "-T";
argv[2] = "WATCOM Debugger";
argc = 3;
if( DbgLines != 0 || DbgColumns != 0 ) {
argv[argc++] = "-geometry";
if( DbgLines == 0 )
DbgLines = 25;
if( DbgColumns == 0 )
DbgColumns = 80;
p = Format( buff, "%ux%u+0+0", DbgColumns, DbgLines ) + 1;
argv[argc++] = buff;
}
for( p = XConfig; p < end; p += strlen( p ) + 1 ) {
while( isspace( *p ) )
++p;
argv[argc++] = p;
}
argv[argc++] = "-tty";
Format( p, "%u", pip[1] );
argv[argc++] = p;
argv[argc] = NULL;
XQshPid = qnx_spawn( 0, 0, 0, -1, -1, _SPAWN_NEWPGRP,
argv[0], argv, environ, NULL, 0 );
if( XQshPid == (pid_t)-1 ) {
StartupErr( "unable to create console helper process" );
}
/* close the write pipe here so that the read fails if xqsh aborts */
close( pip[1] );
len = read( pip[0], buff, sizeof( buff ) );
if( len == -1 ) {
StartupErr( "console helper process unable to initialize" );
}
close( pip[0] );
buff[len] = NULLCHAR;
DbgConHandle = open( buff, O_RDWR );
if( DbgConHandle == -1 ) {
StartupErr( "unable to open debugger console" );
}
SetTermType( "qnx" );
tcsetct( DbgConHandle, getpid() );
signal( SIGHUP, &HupHandler );
return( true );
}