ftp_get.c

涵盖ftp封装的大部分库函数 以get命令为例演示,一个不错的ftp编程资料

/************************************************************/
/** PROGRAM : ftp_get.c                                    **/
/** FUNCTION: test the ftp_api                             **/
/** SYSTEM  : Sco Open Server, UnixWare                    **/
/** COMPILED: cc                                           **/
/** LIBARY  : -lftp -lsocket                               **/
/** AUTHOR  : yiwu                                         **/
/** DATE    :                                 **/
/** MODIFY  :                                              **/
/************************************************************/
#include "ftp_dir.h"
#include <signal.h>

#ifndef LEN
#define LEN			128
#endif

void check_n_close( FTPINFO*, int );

void Proc_Timeout( int sig )
{
	fprintf( stderr, "connect time out.\n" );

	exit( 9 );
}

int main( int argc, char** argv )
{
	LOGININFO	logininfo;
	char		lcz_file_buf[LEN][LEN];
	int			i, li_ret=0;

	memset( &logininfo, 0, sizeof(LOGININFO) );
	strcpy( logininfo.trantime, "7200" );
	logininfo.trantype = BINARY;
	logininfo.tranmode = RECEIVE;
	logininfo.debug = FALSE;
	
	if( argc < 5 )
	{
		printf( "Usage: %s host user passwd remotefile1 [file2 [...]]\n", argv[0] );
		printf( "\thost      : remote host_ip.\n" );
		printf( "\tuser      : user name.\n" );
		printf( "\tpasswd    : user passwd.\n" );
		/*printf( "\tremotepath: remote file path.\n" ); */ /*rem by guoqiuliang in 2005.11.3*/
		printf( "\tremotefile: remote file name[1,2...], at least 1.\n" );
		exit( -1 );
	}

	strcpy( logininfo.remotehost, argv[1] );
	strcpy( logininfo.username, argv[2] );
	strcpy( logininfo.passwd, argv[3] );
	/*strcpy( logininfo.remotepath, argv[4] ); */  /* rem by guoqiuliang in 2005.11.3*/

	memset( lcz_file_buf, 0, sizeof(lcz_file_buf) );
	for( i = 4; i < argc; i ++ )
	{
		strcpy( lcz_file_buf[i-4], argv[i] );
	}

	li_ret = ftpfile( &logininfo, lcz_file_buf, argc-4 );
	if( li_ret < 0 )
		exit( li_ret );
	exit( 0 );
}

int ftpfile( LOGININFO *logininfo, char lca_file_buf[][LEN], int li_count )
{
	FTPINFO		ftpinfo;
	char		lcz_remote_dir[129];
	int			i;
	struct 		sigaction sa;

	memset( &ftpinfo, 0, sizeof(FTPINFO) );

	sa.sa_handler = Proc_Timeout;
	sa.sa_flags = 0;
	sigemptyset( &sa.sa_mask );
	sigaddset( &sa.sa_mask, SIGALRM );
	sigaction( SIGALRM, &sa, NULL );
	alarm( 60 );
	
	/* connectto peer at remote host */
	if( logininfo->debug )
	{
		printf( "connect remote=[%s]\n", logininfo->remotehost );
	}
	if( ftp_prconnect( &ftpinfo, logininfo->remotehost ) < 0 )
	{
		perror( "ftp_prconnect ERROR!\n" );
		check_n_close( &ftpinfo, ABNORMAL );
		return (1);
	}
	if( logininfo->debug )
	{
		printf( "connect ok.\n" );
	}
	

	if( logininfo->debug )
	{
		printf( "login: username=[%s], passwd=[%s]\n", \
				logininfo->username, logininfo->passwd );
	}
	/* send user name to the remote server */
	if( ftp_user( &ftpinfo, logininfo->username ) < 0 )
	{
		perror( "ftp_user ERROR!\n" );
		check_n_close( &ftpinfo, ABNORMAL );
		return (2);
	}
	
	/* send user passwd to the remote server */
	if( ftp_passwd( &ftpinfo, logininfo->passwd ) < 0 )
	{
		perror( "ftp_passwd ERROR!\n" );
		check_n_close( &ftpinfo, ABNORMAL );
		return( 3 );
	}
	if( logininfo->debug )
	{
		printf( "login ok.\n" );
	}
	
	/* set the idle time to this connect */
/*
	if( ftp_idle( &ftpinfo, logininfo->trantime ) < 0 )
	{
		perror( "ftp_idle ERROR!\n" );
		check_n_close( &ftpinfo, ABNORMAL );
		return( 4 );
	}
*/
	
	/* set transfer mode */
	if( logininfo->debug )
	{
		printf( "set tran type...\n" );
	}
	if( ftp_settype( &ftpinfo, logininfo->trantype ) < 0 )
	{
		perror( "ftp_settype ERROR!\n" );
		check_n_close( &ftpinfo, ABNORMAL );
		return( 5 );
	}
	if( logininfo->debug )
	{
		printf( "set tran type ok.\n" );
	}

	/* change the remote dir */
	/*if( logininfo->debug )
	{
		printf( "change dir=[%s]\n", logininfo->remotepath );
	}
	if( ftp_chdir( &ftpinfo, logininfo->remotepath ) < 0 )
	{
		perror( "ftp_chdir ERROR!\n" );
		check_n_close( &ftpinfo, ABNORMAL );
		return( 6 );
	}
	if( logininfo->debug )
	{
		printf( "change dir ok.\n" );
	}*/    /* rem by guoqiuliang in 2005.11.3 */

	/* get the remote file */
	for( i = 0; i < li_count; i ++ )
	{
		if( ftp_getfile( &ftpinfo, lca_file_buf[i], lca_file_buf[i] ) < 0 )
		{
			printf( "get remote file [%s] failed.\n", lca_file_buf[i] );
			return( 11 );
		}
	}

	/* close the connect */
	if( ftp_bye( &ftpinfo ) < 0 )
	{
		perror( "ftp_bye ERROR!\n" );
		return ( 30 );
	}
	
	return ( 0 );
}


void check_n_close( FTPINFO *ftpinfo, int status )
{
	if (ftpinfo -> sockfd >= 0)
		close (ftpinfo -> sockfd);
	
	if (status == ABNORMAL)
		printf("error: %s\n", ftpinfo -> ftp_msg);
	else
		printf("success: %s\n", ftpinfo -> ftp_msg);

	printf("final reply from server: %d\n", ftpinfo -> reply);
	fflush ( stdout );
}