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add client/server (not tested yet)

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This commit is contained in:
Edward Emelianov
2022-03-17 18:06:18 +03:00
parent bd70ff5bc8
commit ebf6a53d63
19 changed files with 2269 additions and 510 deletions
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85
main.c
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@@ -15,12 +15,15 @@
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <omp.h>
#include <signal.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/prctl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>
#include <usefull_macros.h>
@@ -31,8 +34,22 @@
#include "imageview.h"
#endif
#include "omp.h"
#include "socket.h"
static int isserver = FALSE;
static pid_t childpid = 0;
void signals(int signo){
if(childpid){ // master process
DBG("Master killed with sig=%d", signo);
LOGWARN("Master killed with sig=%d", signo);
if(!GP->client){
DBG("Unlink pid file");
unlink(GP->pidfile);
}
exit(signo);
}
// slave: cancel exposition
WARNX("Get signal %d - exit", signo);
DBG("Cancel capturing");
cancel();
@@ -45,6 +62,7 @@ void signals(int signo){
}
int main(int argc, char **argv){
char *self = strdup(argv[0]);
initial_setup();
/*
int cpunumber = sysconf(_SC_NPROCESSORS_ONLN);
@@ -52,13 +70,70 @@ int main(int argc, char **argv){
omp_set_num_threads(cpunumber);
*/
parse_args(argc, argv);
if(GP->outfile && GP->outfileprefix) ERRX("Can't use outfile name and prefix together");
if(GP->outfile && !GP->rewrite){
struct stat filestat;
if(0 == stat(GP->outfile, &filestat)) ERRX("File %s exists!", GP->outfile);
}
if(GP->port || GP->path){
if(GP->path){
WARNX("Options `port` and `path` can't be used together! Point `port` for TCP socket or `path` for UNIX.");
return 1;
}
int port = atoi(GP->port);
if(port < PORTN_MIN || port > PORTN_MAX){
WARNX("Wrong port value: %d", port);
return 1;
}
if(!GP->client) isserver = TRUE;
}
if(GP->logfile){
int lvl = LOGLEVEL_WARN + GP->verbose;
DBG("level = %d", lvl);
if(lvl > LOGLEVEL_ANY) lvl = LOGLEVEL_ANY;
verbose(1, "Log file %s @ level %d\n", GP->logfile, lvl);
OPENLOG(GP->logfile, lvl, 1);
if(!globlog) WARNX("Can't create log file");
}
signal(SIGINT, signals);
signal(SIGQUIT, signals);
signal(SIGABRT, signals);
signal(SIGTERM, signals);
focusers();
wheels();
ccds();
return 0;
signal(SIGHUP, SIG_IGN);
signal(SIGTSTP, SIG_IGN);
// check for another running process in server and standalone mode
if(!GP->client) check4running(self, GP->pidfile);
if(!isserver && !GP->client){ // standalone mode
focusers();
wheels();
ccds();
return 0;
}
LOGMSG("Started");
#ifndef EBUG
if(isserver){
unsigned int pause = 5;
while(1){
childpid = fork();
if(childpid){ // master
double t0 = dtime();
LOGMSG("Created child with pid %d", childpid);
wait(NULL);
LOGWARN("Child %d died", childpid);
if(dtime() - t0 < 1.) pause += 5;
else pause = 1;
if(pause > 900) pause = 900;
sleep(pause); // wait a little before respawn
}else{ // slave
prctl(PR_SET_PDEATHSIG, SIGTERM); // send SIGTERM to child when parent dies
break;
}
}
}
#endif
if(GP->path) return start_socket(isserver, GP->path, FALSE);
if(GP->port) return start_socket(isserver, GP->port, TRUE);
}