if(getcwd(buffer, sizeof(buffer)) != NULL)
printf("%s\n",buffer);
continue;
}
/* send the message to server */
nw = sendto(sd, buf, sizeof(buf), 0, (struct sockaddr *) &ser_addr,
ser_addr_len);
if (nw <= 0)
exit(1);
/* send error */
printf("client[%d]: send %s\n", i, buf);
/* receive the message from server */
bzero(buf, BUFSIZE);
nr = recvfrom(sd, buf, BUFSIZE, 0, (struct sockaddr *) &ser_addr,
&ser_addr_len);
if (buf[nr-1] == '\n')
{
buf[nr-1] = '\0';
--nr;
}
if (nr <= 0)
exit(1);
/* receive error */
printf("client[%d]: receive %s\n", i, buf);
}
}
Server(myftpd.c)
/*
*
Test stream I/O
(server part)
*/
#include
<stdlib.h>
#include
<stdio.h>
#include
<fcntl.h>
#include
<dirent.h>
#include
<unistd.h>
#include
<signal.h>
/* SIGCHLD, sigaction() */
#include
<string.h>
/* strlen(), strcmp() etc */
#include
<errno.h>
/* extern int errno, EINTR, perror() */
#include
<sys/types.h>
/* pid_t, u_long, u_short */
#include
<sys/wait.h>
/* waitpid */
#include
<sys/stat.h>
/* umask */
#include
<sys/socket.h> /* struct sockaddr, socket(), etc */
#include
<netinet/in.h> /* struct sockaddr_in, htons(), htonl(), */
/* and INADDR_ANY */
#define SERV_TCP_PORT 40175
/* server port no */
#define BUFSIZE 1024
void claim_children()
{
pid_t pid=1;
while (pid>0) /* claim as many zombies as we can */
{
pid = waitpid(0, (int *)0, WNOHANG);
}
}
void daemon_init(void)
{
pid_t
pid;
struct sigaction act;
if ( (pid = fork()) < 0)
{
perror("fork");
exit(1);
}
else if (pid > 0)
{
printf("Server PID: %d\n", pid);
exit(0);
/* parent goes bye-bye */
}
/* child continues */
setsid();
/* become session leader */
chdir("/"); /* change working directory */
umask(0); /* clear file mode creation mask */
/* catch SIGCHLD to remove zombies from system */
act.sa_handler = claim_children;
/* use reliable signal */
sigemptyset(&act.sa_mask);
/* not to block other signals */
act.sa_flags
= SA_NOCLDSTOP;
/* not catch stopped children */
sigaction(SIGCHLD,(struct sigaction *)&act,(struct sigaction *)0);
}
void serve_a_client(int sd, struct sockaddr_in cli_addr, int cli_addr_len)
{
int nr, nw, len;
int i =0;
char buf[BUFSIZE], buffer[BUFSIZE];
char *temp;
{
DIR *dp;
struct dirent *file;
char fileName[BUFSIZE], temp[BUFSIZE];
int n = 0;
if((dp = opendir(buffer)) == NULL)/* open directory */
{
printf("Error in opening directory %s\n", buffer);
exit(1);
}
if((file = readdir(dp)) < 0)
{
