伪终端实现sftp远程登录

没用的不说了，直接上代码。

# include <stdio.h>
# include <stdlib.h>
# include <string.h>
# include <unistd.h>
# include <sys/types.h>
# include <linux/limits.h>
# include <pty.h>
#include <utmp.h>
int pty, slave;
void do_passwd( int pty);
int main( int argc, char *argv[] )
{

char pty_name[PATH_MAX];
int ret;
pid_t child;

ret = openpty( &pty, &slave, pty_name, NULL, NULL );
if ( ret == -1 )
{
perror( "openpty" );
exit( EXIT_FAILURE );
}
puts(pty_name);
child = fork();
if ( child == -1 )
{
perror( "fork" );
exit( EXIT_FAILURE );
}
else if ( child == 0 )
{
//close( pty );
login_tty(slave);
execl( "/usr/sbin/sftp", "sftp","root@192.168.1.47", NULL );
}
//close( slave );
printf( "pty name: %s ", pty_name );
do_passwd(pty);
exit( EXIT_SUCCESS );
}
void do_passwd( int pty)
{
char buffer[80];
int ret;
fd_set reads;
char *buf="password";

memset(buf,0,10);
while(1)
{
FD_ZERO( &reads );
FD_SET( pty, &reads );
ret = select( pty+1, &reads, NULL, NULL, NULL );
if ( ret == -1 )
{
perror( "select" );
break;
}
ret = read( pty, buffer, sizeof(buffer) );
if ( ret <= 0 )
{
break;
}
write( fileno(stdout), buffer, ret );
fflush( stdout );
if ( buffer[ret-1] == ' ' )
{
continue;
}
if(flag==1)
{
ret=write(pty,buf, strlen(buf));
char buff=0x0d; //换行
write(pty,&buff,1);
write(fileno(stdout),"taihu123 ",strlen("taihu123 "));
sleep(2);
flag=0;
continue;
}
if(flag==0)
{
char buff=0x0d;
write(pty,"put /pic/pic.jpg /data/20130729.jpg",strlen("put /pic/pic.jpg /data3/20130729.jpg"));
write(pty,&buff,1);
write(fileno(stdout),"put /pic/pic.jpg /data/20130729.jpg",strlen("put /pic/pic.jpg /data3/20130729.jpg"));
sleep(2);
flag=2;
}

if(flag==2)break;
}
return;
}

gcc -lutil -o  *.c

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