Two sections of Linux code, project decommissioned, some use, throwing a pity

Two sections of Linux code, project decommissioned, and some use, throwing away a pity-general Linux technology-Linux programming and kernel information. The following is a detailed description. 1. For normal Linux input, you must press enter to receive the input. You can use this function to perform each response. However, when a BUG is printf, A '\ n' must be added for output. The cause is unknown.

Void get_callee_number (char * buf)
{
Fd_set keyset;
Struct timeval TV;
Int keyfd = fileno (stdin), ret;
Char c;
Struct termios save, ne;
Int I = 0;

Ioctl (0, TCGETS, & save );
Ioctl (0, TCGETS, & ne );
Ne. c_lflag & = ~ (ECHO | ICANON );
Ioctl (0, TCSETS, & ne );

While (1)
{
TV. TV _sec = 2;
TV. TV _usec = 0;
FD_SET (keyfd, & keyset );
Ret = select (keyfd + 1, & keyset, NULL, NULL, & TV );
If (ret = 0 & strlen (buf )! = 0)
Break;
If (FD_ISSET (keyfd, & keyset ))
{
Read (keyfd, & c, 1 );
Buf [I ++] = c;
// Printf ("the key is % c \ n", c );
}
If (c! = 0) printf ("% c \ n", c );

}
Ioctl (0, TCSETS, & save );
}

2. Obtain the local Internet IP address (the first Nic)

Void get_local_ip (int family, char * address, int size)
{
Int fd, intrface;
Struct ifreq buf [16];
// Struct arpreq arp;
Struct ifconf ifc;

Memset (address, 0, size );

If (fd = socket (family, SOCK_DGRAM, 0)> = 0)
{
Ifc. ifc_len = sizeof buf;
Ifc. ifc_buf = (caddr_t) buf;
If (! Ioctl (fd, SIOCGIFCONF, (char *) & ifc ))
{
Intrface = ifc. ifc_len/sizeof (struct ifreq)-1;
// Obtain the IP address of the current Nic
If (! (Ioctl (fd, SIOCGIFADDR, (char *) & buf [intrface])
{
// Strcpy (address, inet_ntoa (struct sockaddr_in *) (& buf [intrface]. ifr_addr)-> sin_addr ));
Snprintf (address, size, (char *) inet_ntoa (struct sockaddr_in *) (& buf [intrface]. ifr_addr)-> sin_addr ));
}
Else
{
Char str [256];
Sprintf (str, "cpm: ioctl device % s", buf [intrface]. ifr_name );
Perror (str );
}
} Else
Perror ("cpm: ioctl ");
} Else
Perror ("cpm: socket ");
Close (fd );
}