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Added client subprocess.

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This commit is contained in:
ha7ilm 2015-12-02 22:40:20 +01:00
parent 558cbbfefe
commit c9406d38c9
2 changed files with 43 additions and 10 deletions
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48
ddcd.cpp
View file

@ -41,11 +41,12 @@ float transition_bw = 0.05;
int bufsize = 1024;
int bufsizeall;
int pipe_max_size;
int in_client = 0;
char ddc_method_str[100] = "td";
ddc_method_t ddc_method;
pid_t main_dsp_proc;
pid_t pgrp;
int input_pipe = STDIN_FILENO; //can be stdin, or the stdout of main_subprocess
int input_fd = STDIN_FILENO; //can be stdin, or the stdout of main_subprocess
pid_t main_subprocess_pid = 0;
char* buf;
@ -76,7 +77,7 @@ void sig_handler(int signo)
else return;
if(pgrp!=1 && pgrp!=0) //I just want to make sure that we cannot kill init or sched
killpg(pgrp, signo);
fprintf(stderr, MSG_START "signal caught, exiting ddcd...\n");
fprintf(stderr, MSG_START "signal %d caught in %s, exiting ddcd...\n", signo, (in_client)?"client":"main");
fflush(stderr);
exit(0);
}
@ -246,12 +247,12 @@ int main(int argc, char* argv[])
FD_ZERO(&select_fds);
FD_SET(listen_socket, &select_fds);
maxfd(&highfd, listen_socket);
if(main_subprocess_pid) input_pipe = pipe_s2m[0]; //else STDIN_FILENO
FD_SET(input_pipe, &select_fds);
maxfd(&highfd, input_pipe);
if(main_subprocess_pid) input_fd = pipe_s2m[0]; //else STDIN_FILENO
FD_SET(input_fd, &select_fds);
maxfd(&highfd, input_fd);
//Set stdin and listen_socket to non-blocking
if(set_nonblocking(input_pipe) || set_nonblocking(listen_socket)) //don't do it before subprocess fork!
if(set_nonblocking(input_fd) || set_nonblocking(listen_socket)) //don't do it before subprocess fork!
error_exit(MSG_START "cannot set_nonblocking()");
for(;;)
@ -288,7 +289,7 @@ int main(int argc, char* argv[])
}
}
int retval = read(input_pipe, buf, bufsizeall);
int retval = read(input_fd, buf, bufsizeall);
if(retval==0)
{
//end of input stream, close clients and exit
@ -371,13 +372,44 @@ void client_cleanup()
void client()
{
in_client=1;
print_client(this_client, "client process forked.");
char client_subprocess_cmd_buf[500];
pid_t client_subprocess_pid = 0;
int input_fd = this_client->pipefd[0];
prctl(PR_SET_PDEATHSIG, SIGHUP); //get a signal when parent exits
if(decimation!=1)
{
int pipe_ctl[2], pipe_stdout[2];
if(pipe(pipe_ctl)==-1) error_exit(MSG_START "cannot open new pipe() for the client subprocess");
if(pipe(pipe_stdout)==-1) error_exit(MSG_START "cannot open new pipe() for the client subprocess");
switch(ddc_method)
{
case M_TD:
sprintf(client_subprocess_cmd_buf, subprocess_cmd_td, pipe_ctl[0], decimation, transition_bw);
break;
case M_FASTDDC:
sprintf(client_subprocess_cmd_buf, subprocess_args_fastddc_2, decimation, pipe_ctl[0], transition_bw);
break;
}
if(!(client_subprocess_pid = run_subprocess( client_subprocess_cmd_buf, this_client->pipefd, pipe_stdout )))
print_exit(MSG_START "couldn't start client_subprocess_cmd!\n");
fprintf(stderr, MSG_START "starting client_subprocess_cmd: %s\n", client_subprocess_cmd_buf);
input_fd = pipe_stdout[0]; //we don't have to set it nonblocking
fprintf(stderr, MSG_START "pipe_stdout[0] = %d\n", pipe_stdout[0]);
setpgrp();
pgrp = getpgrp();
}
for(;;)
{
read(this_client->pipefd[0],buf,bufsizeall);
read(input_fd,buf,bufsizeall);
if(send(this_client->socket,buf,bufsizeall,0)==-1)
{
print_client(this_client, "client process is exiting.");
if(client_subprocess_pid && pgrp!=1 && pgrp!=0) killpg(pgrp, SIGTERM);
exit(0);
}
}

5
ddcd.h
View file

@ -49,8 +49,9 @@ const char subprocess_cmd_td[] = "csdr "
#else
"shift_unroll_cc"
#endif
" --pipe %d,%d | csdr fir_decimate_cc %d %g";
" --pipe %d | csdr fir_decimate_cc %d %g";
const char subprocess_args_fastddc_1[] = "csdr through %d %g";
//const char subprocess_args_fastddc_1[] = "csdr fastddc_fwd_cc %d %g";
const char subprocess_args_fastddc_2[] = "csdr fastddc_inv_cc %d --pipe %d,%d %g";
//const char subprocess_args_fastddc_2[] = "csdr fastddc_inv_cc %d --pipe %d %g";
const char subprocess_args_fastddc_2[] = "csdr convert_u8_f %d %d %g";