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fud-client.c
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fud-client.c
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/* This is an example client for the experimental fud service. */
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <signal.h>
#include <netdb.h>
#include <unistd.h>
#include <sysexits.h>
#include <stdio.h>
extern int optind;
extern char *optarg;
void
usage()
{
fprintf(stderr,"usage: fud-client [-p port] host user mailbox\n");
exit(EX_USAGE);
}
void
timeout(signo)
int signo;
{
fprintf(stderr,"fud-client: request timed out.\n");
exit(EX_UNAVAILABLE);
}
int
main(argc, argv)
int argc;
char **argv;
{
int soc,x,rc;
struct sockaddr_in sin,sfrom;
struct hostent *hp;
fd_set fset;
char buf[512];
time_t lread, lappend;
int numrecent;
char username[16];
char mbox[512];
char time[35];
int port = 4201;
char ch,*hname;
while ((ch = getopt(argc,argv,"p:")) != -1) {
switch(ch) {
case 'p':
port = atoi(optarg);
break;
case '?':
usage();
}
}
argc -= optind;
argv += optind;
if(!*argv)
usage();
hname = *argv;
argv++;
if(!*argv)
usage();
strcpy(username,*argv);
argv++;
if(!*argv)
usage();
strcpy(mbox,*argv);
soc = socket(PF_INET,SOCK_DGRAM,0);
hp = gethostbyname(hname);
if(hp == (struct hostent*) 0) {
fprintf(stderr,"%s doesn't appear to be a valid hostname.\n",hname);
exit(EX_NOHOST);
}
memcpy(&sin.sin_addr.s_addr,hp->h_addr,hp->h_length);
sin.sin_family = AF_INET;
sin.sin_port = htons(port);
sprintf(buf,"%s|%s",username,mbox);
sendto(soc,buf,strlen(buf),0,(struct sockaddr *)&sin,sizeof(sin));
signal(SIGALRM,timeout);
alarm(5);
x = sizeof(sfrom);
rc = recvfrom(soc,buf,512,0,(struct sockaddr *)&sfrom,&x);
alarm(0);
buf[rc] = '\0';
switch(buf[0]) {
case 'U':
printf("Server did not recognize mailbox %s\n",mbox);
exit(EX_UNAVAILABLE);
case 'P':
printf("Permission denied attempting get mailbox info for %s\n",mbox);
exit(EX_NOPERM);
default:
sscanf(buf,"%[^|]|%[^|]|%d|%d|%d", username, mbox, &numrecent, &lread, &lappend);
printf("user: %s\nmbox: %s\nNumber of Recent %d\n", username, mbox, numrecent);
strcpy(time,ctime(&lread));
printf("Last read: %s", time);
strcpy(time,ctime(&lappend));
printf("Last arrived: %s", time);
}
return(0);
}

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fud-client.c (2 KB)

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