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Handle signals from ddcd.

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This commit is contained in:
ha7ilm 2015-12-02 19:38:17 +01:00
parent c6e0a8f5c8
commit 2a6b1c2073
2 changed files with 23 additions and 1 deletions
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19
ddcd.cpp
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@ -64,6 +64,15 @@ int proc_exists(pid_t pid)
return kill(pid, 0) != -1;
}
void sig_handler(int signo)
{
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");
fflush(stderr);
exit(0);
}
client_t* this_client;
int main(int argc, char* argv[])
@ -131,6 +140,15 @@ int main(int argc, char* argv[])
}
else print_exit(MSG_START "invalid parameter given to --method.\n");
//set signals
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = sig_handler;
sigaction(SIGKILL, &sa, NULL);
sigaction(SIGQUIT, &sa, NULL);
sigaction(SIGHUP, &sa, NULL);
prctl(PR_SET_PDEATHSIG, SIGHUP); //get a signal when parent exits
struct sockaddr_in addr_host;
int listen_socket;
std::vector<client_t*> clients;
@ -202,6 +220,7 @@ int main(int argc, char* argv[])
break;
case M_FASTDDC:
sprintf(main_subprocess_cmd_buf, subprocess_args_fastddc_1, decimation, transition_bw);
fprintf(stderr, MSG_START "starting main_subprocess_cmd: %s\n", main_subprocess_cmd_buf);
close(STDIN_FILENO); // redirect stdin to the stdin of the subprocess
main_subprocess_pid = run_subprocess( main_subprocess_cmd_buf, 0, pipe_s2m );
break;

5
ddcd.h
View file

@ -15,6 +15,7 @@
#include <fcntl.h>
#include <errno.h>
#include <sys/wait.h>
#include <sys/prctl.h>
typedef struct client_s
{
@ -34,6 +35,7 @@ void print_client(client_t* client, const char* what);
int proc_exists(pid_t pid);
pid_t run_subprocess(char* cmd, int* pipe_in, int* pipe_out);
void maxfd(int* maxfd, int fd);
void sig_handler(int signo);
typedef enum ddc_method_e
{
@ -49,5 +51,6 @@ const char subprocess_cmd_td[] = "csdr "
#endif
" --pipe %d,%d | csdr fir_decimate_cc %d %g";
const char subprocess_args_fastddc_1[] = "csdr fastddc_fwd_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";