static int stdin_input ()
{
char buf[MAXLINE];
size_t size;
size_t i;
int masterfd = pty_pair_get_masterfd (pty_pair);
if (masterfd == -1) {
logger_write_pos ( logger, __FILE__, __LINE__, "pty_pair_get_masterfd error");
return -1;
}
size = read (STDIN_FILENO, buf, MAXLINE-1);
if (size == -1){
logger_write_pos ( logger, __FILE__, __LINE__, "read error");
return -1;
}
buf[size] = 0;
/* Display GDB output
* The strlen check is here so that if_print does not get called
* when displaying the filedlg. If it does get called, then the
* gdb window gets displayed when the filedlg is up
*/
for(i = 0; i < size; ++i)
if(write(masterfd, &(buf[i]), 1) != 1 ){
logger_write_pos ( logger, __FILE__, __LINE__, "could not write byte");
return -1;
}
return 0;
return 0;
}
int init_readline(void)
{
int slavefd, masterfd;
int length;
slavefd = pty_pair_get_slavefd(pty_pair);
if (slavefd == -1)
return -1;
masterfd = pty_pair_get_masterfd(pty_pair);
if (masterfd == -1)
return -1;
if (tty_off_xon_xoff(slavefd) == -1)
return -1;
/* The 16 is because I don't know how many char's the directory separator
* is going to be, I expect it to be 1, but who knows. */
length = strlen(cgdb_home_dir) + strlen(readline_history_filename) + 16;
readline_history_path = (char *) malloc(sizeof (char) * length);
fs_util_get_path(cgdb_home_dir, readline_history_filename,
readline_history_path);
rline = rline_initialize(slavefd, rlctx_send_user_command, tab_completion,
"dumb");
rline_read_history(rline, readline_history_path);
return 0;
}
int a2_open_new_tty(struct annotate_two *a2, int *inferior_stdin, int *inferior_stdout)
{
close_inferior_connection(a2);
a2->pty_pair = pty_pair_create();
if (!a2->pty_pair) {
logger_write_pos(logger, __FILE__, __LINE__, "pty_pair_create failed");
return -1;
}
*inferior_stdin = pty_pair_get_masterfd(a2->pty_pair);
*inferior_stdout = pty_pair_get_masterfd(a2->pty_pair);
a2_set_inferior_tty(a2);
return 0;
}
int a2_open_new_tty(struct annotate_two *a2, int *inferior_stdin, int *inferior_stdout)
{
if (a2->pty_pair)
pty_pair_destroy(a2->pty_pair);
a2->pty_pair = pty_pair_create();
if (!a2->pty_pair) {
logger_write_pos(logger, __FILE__, __LINE__, "pty_pair_create failed");
return -1;
}
*inferior_stdin = pty_pair_get_masterfd(a2->pty_pair);
*inferior_stdout = pty_pair_get_masterfd(a2->pty_pair);
commands_issue_command(a2, ANNOTATE_TTY,
pty_pair_get_slavename(a2->pty_pair), 1);
return 0;
}
static int tgdb_open_new_tty(struct tgdb *tgdb, int *inferior_stdin,
int *inferior_stdout)
{
if (tgdb->pty_pair)
pty_pair_destroy(tgdb->pty_pair);
tgdb->pty_pair = pty_pair_create();
if (!tgdb->pty_pair) {
clog_error(CLOG_CGDB, "pty_pair_create failed");
return -1;
}
*inferior_stdin = pty_pair_get_masterfd(tgdb->pty_pair);
*inferior_stdout = pty_pair_get_masterfd(tgdb->pty_pair);
tgdb_request_ptr request_ptr;
request_ptr = (tgdb_request_ptr)cgdb_malloc(sizeof (struct tgdb_request));
request_ptr->header = TGDB_REQUEST_TTY;
request_ptr->choice.tty_command.slavename =
pty_pair_get_slavename(tgdb->pty_pair);
tgdb_run_or_queue_request(tgdb, request_ptr, true);
return 0;
}
static void send_key(int focus, char key)
{
if (focus == 1) {
int size;
int masterfd;
masterfd = pty_pair_get_masterfd(pty_pair);
if (masterfd == -1)
logger_write_pos(logger, __FILE__, __LINE__, "send_key error");
size = write(masterfd, &key, sizeof (char));
if (size != 1)
logger_write_pos(logger, __FILE__, __LINE__, "send_key error");
} else if (focus == 2) {
tgdb_send_inferior_char(tgdb, key);
}
}
static int readline_input()
{
const int MAX = 1024;
char *buf = malloc(MAX + 1);
int size;
int masterfd = pty_pair_get_masterfd(pty_pair);
if (masterfd == -1) {
logger_write_pos(logger, __FILE__, __LINE__,
"pty_pair_get_masterfd error");
return -1;
}
size = read(masterfd, buf, MAX);
if (size == -1) {
logger_write_pos(logger, __FILE__, __LINE__, "read error");
free(buf);
buf = NULL;
return -1;
}
buf[size] = 0;
/* Display GDB output
* The strlen check is here so that if_print does not get called
* when displaying the filedlg. If it does get called, then the
* gdb window gets displayed when the filedlg is up
*/
if (size > 0)
if_print(buf);
free(buf);
buf = NULL;
return 0;
}
static int main_loop(void)
{
fd_set rset;
int max;
int masterfd, slavefd;
masterfd = pty_pair_get_masterfd(pty_pair);
if (masterfd == -1) {
logger_write_pos(logger, __FILE__, __LINE__,
"pty_pair_get_masterfd error");
return -1;
}
slavefd = pty_pair_get_slavefd(pty_pair);
if (slavefd == -1) {
logger_write_pos(logger, __FILE__, __LINE__,
"pty_pair_get_slavefd error");
return -1;
}
max = (gdb_fd > STDIN_FILENO) ? gdb_fd : STDIN_FILENO;
max = (max > tty_fd) ? max : tty_fd;
max = (max > resize_pipe[0]) ? max : resize_pipe[0];
max = (max > slavefd) ? max : slavefd;
max = (max > masterfd) ? max : masterfd;
/* Main (infinite) loop:
* Sits and waits for input on either stdin (user input) or the
* GDB file descriptor. When input is received, wrapper functions
* are called to process the input, and handle it appropriately.
* This will result in calls to the curses interface, typically. */
for (;;) {
/* Reset the fd_set, and watch for input from GDB or stdin */
FD_ZERO(&rset);
FD_SET(STDIN_FILENO, &rset);
FD_SET(gdb_fd, &rset);
FD_SET(tty_fd, &rset);
FD_SET(resize_pipe[0], &rset);
/* No readline activity allowed while displaying tab completion */
if (!is_tab_completing) {
FD_SET(slavefd, &rset);
FD_SET(masterfd, &rset);
}
/* Wait for input */
if (select(max + 1, &rset, NULL, NULL, NULL) == -1) {
if (errno == EINTR)
continue;
else {
logger_write_pos(logger, __FILE__, __LINE__,
"select failed: %s", strerror(errno));
return -1;
}
}
/* Input received through the pty: Handle it
* Wrote to masterfd, now slavefd is ready, tell readline */
if (FD_ISSET(slavefd, &rset))
rline_rl_callback_read_char(rline);
/* Input received through the pty: Handle it
* Readline read from slavefd, and it wrote to the masterfd.
*/
if (FD_ISSET(masterfd, &rset))
if (readline_input() == -1)
return -1;
/* Input received: Handle it */
if (FD_ISSET(STDIN_FILENO, &rset)) {
int val = user_input_loop();
/* The below condition happens on cygwin when user types ctrl-z
* select returns (when it shouldn't) with the value of 1. the
* user input loop gets called, the kui gets called and does a
* non blocking read which returns EAGAIN. The kui then passes
* the -1 up the stack with out making any more system calls. */
if (val == -1 && errno == EAGAIN)
continue;
else if (val == -1)
return -1;
}
/* child's ouptut -> stdout
* The continue is important I think. It allows all of the child
* output to get written to stdout before tgdb's next command.
* This is because sometimes they are both ready.
*/
if (FD_ISSET(tty_fd, &rset)) {
if (child_input() == -1)
return -1;
continue;
}
/* gdb's output -> stdout */
if (FD_ISSET(gdb_fd, &rset)) {
if (gdb_input() == -1) {
return -1;
}
/* When the file dialog is opened, the user input is blocked,
* until GDB returns all the files that should be displayed,
* and the file dialog can open, and be prepared to receive
* input. So, if we are in the file dialog, and are no longer
* waiting for the gdb command, then read the input.
*/
if (kui_manager_cangetkey(kui_ctx)) {
user_input_loop();
}
}
/* A resize signal occured */
if (FD_ISSET(resize_pipe[0], &rset))
if (cgdb_resize_term(resize_pipe[0]) == -1)
return -1;
}
return 0;
}
int main(int argc, char **argv)
{
int gdb_fd, child_fd, slavefd, masterfd;
#if 0
int c;
read(0, &c, 1);
#endif
if (tty_cbreak(STDIN_FILENO, &term_attributes) == -1)
logger_write_pos(logger, __FILE__, __LINE__, "tty_cbreak error");
pty_pair = pty_pair_create();
if (!pty_pair) {
fprintf(stderr, "%s:%d Unable to create PTY pair", __FILE__, __LINE__);
exit(-1);
}
slavefd = pty_pair_get_slavefd(pty_pair);
if (slavefd == -1) {
fprintf(stderr, "%s:%d Unable to get slavefd", __FILE__, __LINE__);
exit(-1);
}
masterfd = pty_pair_get_masterfd(pty_pair);
if (masterfd == -1) {
fprintf(stderr, "%s:%d Unable to get masterfd", __FILE__, __LINE__);
exit(-1);
}
if (tty_off_xon_xoff(masterfd) == -1)
exit(-1);
rline = rline_initialize(slavefd, rlctx_send_user_command, tab_completion,
getenv("TERM"));
if ((tgdb = tgdb_initialize(NULL, argc - 1, argv + 1, &gdb_fd,
&child_fd)) == NULL) {
logger_write_pos(logger, __FILE__, __LINE__, "tgdb_start error");
goto driver_end;
}
if (tgdb_set_verbose_error_handling(tgdb, 1) != 1) {
logger_write_pos(logger, __FILE__, __LINE__, "driver error");
goto driver_end;
}
/* Ask TGDB to print error messages */
if (tgdb_set_verbose_gui_command_output(tgdb, 1) != 1) {
logger_write_pos(logger, __FILE__, __LINE__, "driver error");
goto driver_end;
}
set_up_signal();
main_loop(gdb_fd, child_fd);
if (tgdb_shutdown(tgdb) == -1)
logger_write_pos(logger, __FILE__, __LINE__, "could not shutdown");
driver_end:
if (tty_set_attributes(STDIN_FILENO, &term_attributes) == -1)
logger_write_pos(logger, __FILE__, __LINE__, "tty_reset error");
return 0;
}
int main_loop(int gdbfd, int childfd)
{
int max;
fd_set rfds;
int result;
int masterfd, slavefd;
masterfd = pty_pair_get_masterfd(pty_pair);
if (masterfd == -1) {
logger_write_pos(logger, __FILE__, __LINE__,
"pty_pair_get_masterfd error");
return -1;
}
slavefd = pty_pair_get_slavefd(pty_pair);
if (slavefd == -1) {
logger_write_pos(logger, __FILE__, __LINE__,
"pty_pair_get_slavefd error");
return -1;
}
/* When TGDB is ready, we read from STDIN, otherwise, leave the data buffered. */
/* get max fd for select loop */
max = (gdbfd > STDIN_FILENO) ? gdbfd : STDIN_FILENO;
max = (max > childfd) ? max : childfd;
max = (max > slavefd) ? max : slavefd;
max = (max > masterfd) ? max : masterfd;
while (1) {
/* Clear the set and
*
* READ FROM:
* stdin (user or gui)
* master (gdb's stdout)
* gui_stdout (gui's stdout sending new info)
*
*/
FD_ZERO(&rfds);
/* Let the terminal emulate the char's when TGDB is busy */
FD_SET(STDIN_FILENO, &rfds);
FD_SET(gdbfd, &rfds);
FD_SET(slavefd, &rfds);
FD_SET(masterfd, &rfds);
if (childfd != -1)
FD_SET(childfd, &rfds);
result = select(max + 1, &rfds, NULL, NULL, NULL);
/* if the signal interuppted system call keep going */
if (result == -1 && errno == EINTR)
continue;
else if (result == -1) /* on error ... must die -> stupid OS */
logger_write_pos(logger, __FILE__, __LINE__, "select failed");
/* Input received through the pty: Handle it
* Readline read from slavefd, and it wrote to the masterfd.
*/
if (FD_ISSET(masterfd, &rfds))
if (readline_input() == -1)
return -1;
if (FD_ISSET(slavefd, &rfds))
rline_rl_callback_read_char(rline);
/* stdin -> readline input */
if (FD_ISSET(STDIN_FILENO, &rfds)) {
stdin_input();
}
/* child's output -> stdout */
if (childfd != -1 && FD_ISSET(childfd, &rfds)) {
tty_input();
continue;
}
/* gdb's output -> stdout */
if (FD_ISSET(gdbfd, &rfds))
if (gdb_input() == -1)
return -1;
}
return 0;
}