/*
* net_server.c
*
* Server process for time accounting system, network version.
* This should be run as a daemon or in the background.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <stdio.h>
#include "time_entry.h"
main()
{
int_skt_id, /* Socket descriptor */
msg_sock, /* Socket that will accept messages */
length,
i,j;
EVENT_TYPE event; /* An event from one of the client processes */
struct sockaddr_in sa; /* Socket address structure */
char buff[80];
FILE *time_file;
/* Open the output file in append mode */
if(!(time_file = fopen(TIME_FILE, "a+"))){
perror("Opening time file");
exit(1);
}
fprintf(time_file, "\n***STARTUP***\n");
/*
* Create a stream type socket in the INTERNET domain, with the
* default protocol.
*/
skt_id = socket(AF_INET, SOCK_STREAM, 0);
if(skt_id == -1){
/* Error. Cleanup & leave */
perror("Can't create socket");
exit(1);
}
/*
* Now that the socket exists, set up the address structure
* and bind an address to the socket.
*/
sa.sin_family = AF_UNIX;
sa.sin_addr.s_addr = INADDR_ANY; /* Any available address */
sa.sin_port=0; /* Any port */
if(bind(skt_id, &sa, sizeof(sa)) == -1){
perror("Can't bind address");
exit(1);
}
/*
* Find out the port number, since we asked for any available
*/
length=sizeof(sa);
if(getsockname(skt_id, &sa, &length)){
perror("Can't find name");
exit(1);
}
printf("Port: %d\n", ntohs(sa.sin_port));
listen(skt_id, 5); /* Set up the queue for requests */
/*
* Main loop is here. Accept a connection, read the message,
* and write the time record...
*/
do{
/*
* Accept a connection. Accept will return a new socket
* descriptor with the same properties as the original. This
* new socket is used for read and write
*/
msg_sock = accept(skt_id, 0, 0);
if(msg_sock == -1){
perror("Can't accept connections");
exit(1);
}
if(read(msg_sock, &event, sizeof(event)) < 0){
perror("Read");
exit(1);
}
if(event.event_cd != SHUT_DOWN){
if (fwrite(&event, sizeof(event),1,time_file) != 1){
perror("Write");
exit(1);
}
}
close(msg_sock); /* Close the socket retruned by accept... */
}while(event.event_cd != SHUT_DOWN);
/* Cleanup */
unlink(SOCKET_NAME);
fprintf(time_file, "\n***SHUTDOWN***\n");
fclose(time_file);
exit(0);
}