hush/networking/wget.c

811 lines
21 KiB
C

/* vi: set sw=4 ts=4: */
/*
* wget - retrieve a file using HTTP or FTP
*
* Chip Rosenthal Covad Communications <chip@laserlink.net>
*
*/
#include <getopt.h> /* for struct option */
#include "libbb.h"
struct host_info {
// May be used if we ever will want to free() all xstrdup()s...
/* char *allocated; */
const char *path;
const char *user;
char *host;
int port;
smallint is_ftp;
};
/* Globals (can be accessed from signal handlers) */
struct globals {
off_t content_len; /* Content-length of the file */
off_t beg_range; /* Range at which continue begins */
#if ENABLE_FEATURE_WGET_STATUSBAR
off_t lastsize;
off_t totalsize;
off_t transferred; /* Number of bytes transferred so far */
const char *curfile; /* Name of current file being transferred */
unsigned lastupdate_sec;
unsigned start_sec;
#endif
smallint chunked; /* chunked transfer encoding */
};
#define G (*(struct globals*)&bb_common_bufsiz1)
struct BUG_G_too_big {
char BUG_G_too_big[sizeof(G) <= COMMON_BUFSIZE ? 1 : -1];
};
#define content_len (G.content_len )
#define beg_range (G.beg_range )
#define lastsize (G.lastsize )
#define totalsize (G.totalsize )
#define transferred (G.transferred )
#define curfile (G.curfile )
#define lastupdate_sec (G.lastupdate_sec )
#define start_sec (G.start_sec )
#define chunked (G.chunked )
#define INIT_G() do { } while (0)
#if ENABLE_FEATURE_WGET_STATUSBAR
enum {
STALLTIME = 5 /* Seconds when xfer considered "stalled" */
};
static int getttywidth(void)
{
int width;
get_terminal_width_height(0, &width, NULL);
return width;
}
static void progressmeter(int flag)
{
/* We can be called from signal handler */
int save_errno = errno;
off_t abbrevsize;
unsigned since_last_update, elapsed;
unsigned ratio;
int barlength, i;
if (flag == -1) { /* first call to progressmeter */
start_sec = monotonic_sec();
lastupdate_sec = start_sec;
lastsize = 0;
totalsize = content_len + beg_range; /* as content_len changes.. */
}
ratio = 100;
if (totalsize != 0 && !chunked) {
/* long long helps to have it working even if !LFS */
ratio = (unsigned) (100ULL * (transferred+beg_range) / totalsize);
if (ratio > 100) ratio = 100;
}
fprintf(stderr, "\r%-20.20s%4d%% ", curfile, ratio);
barlength = getttywidth() - 49;
if (barlength > 0) {
/* god bless gcc for variable arrays :) */
i = barlength * ratio / 100;
{
char buf[i+1];
memset(buf, '*', i);
buf[i] = '\0';
fprintf(stderr, "|%s%*s|", buf, barlength - i, "");
}
}
i = 0;
abbrevsize = transferred + beg_range;
while (abbrevsize >= 100000) {
i++;
abbrevsize >>= 10;
}
/* see http://en.wikipedia.org/wiki/Tera */
fprintf(stderr, "%6d%c ", (int)abbrevsize, " kMGTPEZY"[i]);
// Nuts! Ain't it easier to update progress meter ONLY when we transferred++?
elapsed = monotonic_sec();
since_last_update = elapsed - lastupdate_sec;
if (transferred > lastsize) {
lastupdate_sec = elapsed;
lastsize = transferred;
if (since_last_update >= STALLTIME) {
/* We "cut off" these seconds from elapsed time
* by adjusting start time */
start_sec += since_last_update;
}
since_last_update = 0; /* we are un-stalled now */
}
elapsed -= start_sec; /* now it's "elapsed since start" */
if (since_last_update >= STALLTIME) {
fprintf(stderr, " - stalled -");
} else {
off_t to_download = totalsize - beg_range;
if (transferred <= 0 || (int)elapsed <= 0 || transferred > to_download || chunked) {
fprintf(stderr, "--:--:-- ETA");
} else {
/* to_download / (transferred/elapsed) - elapsed: */
int eta = (int) ((unsigned long long)to_download*elapsed/transferred - elapsed);
/* (long long helps to have working ETA even if !LFS) */
i = eta % 3600;
fprintf(stderr, "%02d:%02d:%02d ETA", eta / 3600, i / 60, i % 60);
}
}
if (flag == 0) {
/* last call to progressmeter */
alarm(0);
transferred = 0;
fputc('\n', stderr);
} else {
if (flag == -1) {
/* first call to progressmeter */
struct sigaction sa;
sa.sa_handler = progressmeter;
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_RESTART;
sigaction(SIGALRM, &sa, NULL);
}
alarm(1);
}
errno = save_errno;
}
/* Original copyright notice which applies to the CONFIG_FEATURE_WGET_STATUSBAR stuff,
* much of which was blatantly stolen from openssh. */
/*-
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
* ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
*
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#else /* FEATURE_WGET_STATUSBAR */
static ALWAYS_INLINE void progressmeter(int flag) { }
#endif
/* Read NMEMB bytes into PTR from STREAM. Returns the number of bytes read,
* and a short count if an eof or non-interrupt error is encountered. */
static size_t safe_fread(void *ptr, size_t nmemb, FILE *stream)
{
size_t ret;
char *p = (char*)ptr;
do {
clearerr(stream);
ret = fread(p, 1, nmemb, stream);
p += ret;
nmemb -= ret;
} while (nmemb && ferror(stream) && errno == EINTR);
return p - (char*)ptr;
}
/* Read a line or SIZE-1 bytes into S, whichever is less, from STREAM.
* Returns S, or NULL if an eof or non-interrupt error is encountered. */
static char *safe_fgets(char *s, int size, FILE *stream)
{
char *ret;
do {
clearerr(stream);
ret = fgets(s, size, stream);
} while (ret == NULL && ferror(stream) && errno == EINTR);
return ret;
}
#if ENABLE_FEATURE_WGET_AUTHENTICATION
/* Base64-encode character string. buf is assumed to be char buf[512]. */
static char *base64enc_512(char buf[512], const char *str)
{
unsigned len = strlen(str);
if (len > 512/4*3 - 10) /* paranoia */
len = 512/4*3 - 10;
bb_uuencode(buf, str, len, bb_uuenc_tbl_base64);
return buf;
}
#endif
static FILE *open_socket(len_and_sockaddr *lsa)
{
FILE *fp;
/* glibc 2.4 seems to try seeking on it - ??! */
/* hopefully it understands what ESPIPE means... */
fp = fdopen(xconnect_stream(lsa), "r+");
if (fp == NULL)
bb_perror_msg_and_die("fdopen");
return fp;
}
static int ftpcmd(const char *s1, const char *s2, FILE *fp, char *buf)
{
int result;
if (s1) {
if (!s2) s2 = "";
fprintf(fp, "%s%s\r\n", s1, s2);
fflush(fp);
}
do {
char *buf_ptr;
if (fgets(buf, 510, fp) == NULL) {
bb_perror_msg_and_die("error getting response");
}
buf_ptr = strstr(buf, "\r\n");
if (buf_ptr) {
*buf_ptr = '\0';
}
} while (!isdigit(buf[0]) || buf[3] != ' ');
buf[3] = '\0';
result = xatoi_u(buf);
buf[3] = ' ';
return result;
}
static void parse_url(char *src_url, struct host_info *h)
{
char *url, *p, *sp;
/* h->allocated = */ url = xstrdup(src_url);
if (strncmp(url, "http://", 7) == 0) {
h->port = bb_lookup_port("http", "tcp", 80);
h->host = url + 7;
h->is_ftp = 0;
} else if (strncmp(url, "ftp://", 6) == 0) {
h->port = bb_lookup_port("ftp", "tcp", 21);
h->host = url + 6;
h->is_ftp = 1;
} else
bb_error_msg_and_die("not an http or ftp url: %s", url);
// FYI:
// "Real" wget 'http://busybox.net?var=a/b' sends this request:
// 'GET /?var=a/b HTTP 1.0'
// and saves 'index.html?var=a%2Fb' (we save 'b')
// wget 'http://busybox.net?login=john@doe':
// request: 'GET /?login=john@doe HTTP/1.0'
// saves: 'index.html?login=john@doe' (we save '?login=john@doe')
// wget 'http://busybox.net#test/test':
// request: 'GET / HTTP/1.0'
// saves: 'index.html' (we save 'test')
//
// We also don't add unique .N suffix if file exists...
sp = strchr(h->host, '/');
p = strchr(h->host, '?'); if (!sp || (p && sp > p)) sp = p;
p = strchr(h->host, '#'); if (!sp || (p && sp > p)) sp = p;
if (!sp) {
h->path = "";
} else if (*sp == '/') {
*sp = '\0';
h->path = sp + 1;
} else { // '#' or '?'
// http://busybox.net?login=john@doe is a valid URL
// memmove converts to:
// http:/busybox.nett?login=john@doe...
memmove(h->host - 1, h->host, sp - h->host);
h->host--;
sp[-1] = '\0';
h->path = sp;
}
sp = strrchr(h->host, '@');
h->user = NULL;
if (sp != NULL) {
h->user = h->host;
*sp = '\0';
h->host = sp + 1;
}
sp = h->host;
}
static char *gethdr(char *buf, size_t bufsiz, FILE *fp /*, int *istrunc*/)
{
char *s, *hdrval;
int c;
/* *istrunc = 0; */
/* retrieve header line */
if (fgets(buf, bufsiz, fp) == NULL)
return NULL;
/* see if we are at the end of the headers */
for (s = buf; *s == '\r'; ++s)
continue;
if (*s == '\n')
return NULL;
/* convert the header name to lower case */
for (s = buf; isalnum(*s) || *s == '-' || *s == '.'; ++s)
*s = tolower(*s);
/* verify we are at the end of the header name */
if (*s != ':')
bb_error_msg_and_die("bad header line: %s", buf);
/* locate the start of the header value */
*s++ = '\0';
hdrval = skip_whitespace(s);
/* locate the end of header */
while (*s && *s != '\r' && *s != '\n')
++s;
/* end of header found */
if (*s) {
*s = '\0';
return hdrval;
}
/* Rats! The buffer isn't big enough to hold the entire header value. */
while (c = getc(fp), c != EOF && c != '\n')
continue;
/* *istrunc = 1; */
return hdrval;
}
int wget_main(int argc, char **argv);
int wget_main(int argc, char **argv)
{
char buf[512];
struct host_info server, target;
len_and_sockaddr *lsa;
int status;
int port;
int try = 5;
unsigned opt;
char *str;
char *proxy = 0;
char *dir_prefix = NULL;
#if ENABLE_FEATURE_WGET_LONG_OPTIONS
char *extra_headers = NULL;
llist_t *headers_llist = NULL;
#endif
FILE *sfp = NULL; /* socket to web/ftp server */
FILE *dfp; /* socket to ftp server (data) */
char *fname_out; /* where to direct output (-O) */
bool got_clen = 0; /* got content-length: from server */
int output_fd = -1;
bool use_proxy = 1; /* Use proxies if env vars are set */
const char *proxy_flag = "on"; /* Use proxies if env vars are set */
const char *user_agent = "Wget";/* "User-Agent" header field */
static const char keywords[] ALIGN1 =
"content-length\0""transfer-encoding\0""chunked\0""location\0";
enum {
KEY_content_length = 1, KEY_transfer_encoding, KEY_chunked, KEY_location
};
enum {
WGET_OPT_CONTINUE = 0x1,
WGET_OPT_SPIDER = 0x2,
WGET_OPT_QUIET = 0x4,
WGET_OPT_OUTNAME = 0x8,
WGET_OPT_PREFIX = 0x10,
WGET_OPT_PROXY = 0x20,
WGET_OPT_USER_AGENT = 0x40,
WGET_OPT_PASSIVE = 0x80,
WGET_OPT_HEADER = 0x100,
};
#if ENABLE_FEATURE_WGET_LONG_OPTIONS
static const char wget_longopts[] ALIGN1 =
/* name, has_arg, val */
"continue\0" No_argument "c"
"spider\0" No_argument "s"
"quiet\0" No_argument "q"
"output-document\0" Required_argument "O"
"directory-prefix\0" Required_argument "P"
"proxy\0" Required_argument "Y"
"user-agent\0" Required_argument "U"
"passive-ftp\0" No_argument "\xff"
"header\0" Required_argument "\xfe"
;
#endif
INIT_G();
#if ENABLE_FEATURE_WGET_LONG_OPTIONS
applet_long_options = wget_longopts;
#endif
/* server.allocated = target.allocated = NULL; */
opt_complementary = "-1" USE_FEATURE_WGET_LONG_OPTIONS(":\xfe::");
opt = getopt32(argv, "csqO:P:Y:U:",
&fname_out, &dir_prefix,
&proxy_flag, &user_agent
USE_FEATURE_WGET_LONG_OPTIONS(, &headers_llist)
);
if (strcmp(proxy_flag, "off") == 0) {
/* Use the proxy if necessary */
use_proxy = 0;
}
#if ENABLE_FEATURE_WGET_LONG_OPTIONS
if (headers_llist) {
int size = 1;
char *cp;
llist_t *ll = headers_llist;
while (ll) {
size += strlen(ll->data) + 2;
ll = ll->link;
}
extra_headers = cp = xmalloc(size);
while (headers_llist) {
cp += sprintf(cp, "%s\r\n", headers_llist->data);
headers_llist = headers_llist->link;
}
}
#endif
parse_url(argv[optind], &target);
server.host = target.host;
server.port = target.port;
/* Use the proxy if necessary */
if (use_proxy) {
proxy = getenv(target.is_ftp ? "ftp_proxy" : "http_proxy");
if (proxy && *proxy) {
parse_url(proxy, &server);
} else {
use_proxy = 0;
}
}
/* Guess an output filename, if there was no -O FILE */
if (!(opt & WGET_OPT_OUTNAME)) {
fname_out = bb_get_last_path_component_nostrip(target.path);
/* handle "wget http://kernel.org//" */
if (fname_out[0] == '/' || !fname_out[0])
fname_out = (char*)"index.html";
/* -P DIR is considered only if there was no -O FILE */
if (dir_prefix)
fname_out = concat_path_file(dir_prefix, fname_out);
} else {
if (LONE_DASH(fname_out)) {
/* -O - */
output_fd = 1;
opt &= ~WGET_OPT_CONTINUE;
}
}
#if ENABLE_FEATURE_WGET_STATUSBAR
curfile = bb_get_last_path_component_nostrip(fname_out);
#endif
/* Impossible?
if ((opt & WGET_OPT_CONTINUE) && !fname_out)
bb_error_msg_and_die("cannot specify continue (-c) without a filename (-O)"); */
/* Determine where to start transfer */
if (opt & WGET_OPT_CONTINUE) {
output_fd = open(fname_out, O_WRONLY);
if (output_fd >= 0) {
beg_range = xlseek(output_fd, 0, SEEK_END);
}
/* File doesn't exist. We do not create file here yet.
We are not sure it exists on remove side */
}
/* We want to do exactly _one_ DNS lookup, since some
* sites (i.e. ftp.us.debian.org) use round-robin DNS
* and we want to connect to only one IP... */
lsa = xhost2sockaddr(server.host, server.port);
if (!(opt & WGET_OPT_QUIET)) {
fprintf(stderr, "Connecting to %s (%s)\n", server.host,
xmalloc_sockaddr2dotted(&lsa->sa));
/* We leak result of xmalloc_sockaddr2dotted */
}
if (use_proxy || !target.is_ftp) {
/*
* HTTP session
*/
do {
got_clen = 0;
chunked = 0;
if (!--try)
bb_error_msg_and_die("too many redirections");
/* Open socket to http server */
if (sfp) fclose(sfp);
sfp = open_socket(lsa);
/* Send HTTP request. */
if (use_proxy) {
fprintf(sfp, "GET %stp://%s/%s HTTP/1.1\r\n",
target.is_ftp ? "f" : "ht", target.host,
target.path);
} else {
fprintf(sfp, "GET /%s HTTP/1.1\r\n", target.path);
}
fprintf(sfp, "Host: %s\r\nUser-Agent: %s\r\n",
target.host, user_agent);
#if ENABLE_FEATURE_WGET_AUTHENTICATION
if (target.user) {
fprintf(sfp, "Proxy-Authorization: Basic %s\r\n"+6,
base64enc_512(buf, target.user));
}
if (use_proxy && server.user) {
fprintf(sfp, "Proxy-Authorization: Basic %s\r\n",
base64enc_512(buf, server.user));
}
#endif
if (beg_range)
fprintf(sfp, "Range: bytes=%"OFF_FMT"d-\r\n", beg_range);
#if ENABLE_FEATURE_WGET_LONG_OPTIONS
if (extra_headers)
fputs(extra_headers, sfp);
#endif
fprintf(sfp, "Connection: close\r\n\r\n");
/*
* Retrieve HTTP response line and check for "200" status code.
*/
read_response:
if (fgets(buf, sizeof(buf), sfp) == NULL)
bb_error_msg_and_die("no response from server");
str = buf;
str = skip_non_whitespace(str);
str = skip_whitespace(str);
// FIXME: no error check
// xatou wouldn't work: "200 OK"
status = atoi(str);
switch (status) {
case 0:
case 100:
while (gethdr(buf, sizeof(buf), sfp /*, &n*/) != NULL)
/* eat all remaining headers */;
goto read_response;
case 200:
break;
case 300: /* redirection */
case 301:
case 302:
case 303:
break;
case 206:
if (beg_range)
break;
/*FALLTHRU*/
default:
/* Show first line only and kill any ESC tricks */
buf[strcspn(buf, "\n\r\x1b")] = '\0';
bb_error_msg_and_die("server returned error: %s", buf);
}
/*
* Retrieve HTTP headers.
*/
while ((str = gethdr(buf, sizeof(buf), sfp /*, &n*/)) != NULL) {
/* gethdr did already convert the "FOO:" string to lowercase */
smalluint key = index_in_strings(keywords, *&buf) + 1;
if (key == KEY_content_length) {
content_len = BB_STRTOOFF(str, NULL, 10);
if (errno || content_len < 0) {
bb_error_msg_and_die("content-length %s is garbage", str);
}
got_clen = 1;
continue;
}
if (key == KEY_transfer_encoding) {
if (index_in_strings(keywords, str_tolower(str)) + 1 != KEY_chunked)
bb_error_msg_and_die("transfer encoding '%s' is not supported", str);
chunked = got_clen = 1;
}
if (key == KEY_location) {
if (str[0] == '/')
/* free(target.allocated); */
target.path = /* target.allocated = */ xstrdup(str+1);
else {
parse_url(str, &target);
if (use_proxy == 0) {
server.host = target.host;
server.port = target.port;
}
free(lsa);
lsa = xhost2sockaddr(server.host, server.port);
break;
}
}
}
} while (status >= 300);
dfp = sfp;
} else {
/*
* FTP session
*/
if (!target.user)
target.user = xstrdup("anonymous:busybox@");
sfp = open_socket(lsa);
if (ftpcmd(NULL, NULL, sfp, buf) != 220)
bb_error_msg_and_die("%s", buf+4);
/*
* Splitting username:password pair,
* trying to log in
*/
str = strchr(target.user, ':');
if (str)
*(str++) = '\0';
switch (ftpcmd("USER ", target.user, sfp, buf)) {
case 230:
break;
case 331:
if (ftpcmd("PASS ", str, sfp, buf) == 230)
break;
/* FALLTHRU (failed login) */
default:
bb_error_msg_and_die("ftp login: %s", buf+4);
}
ftpcmd("TYPE I", NULL, sfp, buf);
/*
* Querying file size
*/
if (ftpcmd("SIZE ", target.path, sfp, buf) == 213) {
content_len = BB_STRTOOFF(buf+4, NULL, 10);
if (errno || content_len < 0) {
bb_error_msg_and_die("SIZE value is garbage");
}
got_clen = 1;
}
/*
* Entering passive mode
*/
if (ftpcmd("PASV", NULL, sfp, buf) != 227) {
pasv_error:
bb_error_msg_and_die("bad response to %s: %s", "PASV", buf);
}
// Response is "227 garbageN1,N2,N3,N4,P1,P2[)garbage]
// Server's IP is N1.N2.N3.N4 (we ignore it)
// Server's port for data connection is P1*256+P2
str = strrchr(buf, ')');
if (str) str[0] = '\0';
str = strrchr(buf, ',');
if (!str) goto pasv_error;
port = xatou_range(str+1, 0, 255);
*str = '\0';
str = strrchr(buf, ',');
if (!str) goto pasv_error;
port += xatou_range(str+1, 0, 255) * 256;
set_nport(lsa, htons(port));
dfp = open_socket(lsa);
if (beg_range) {
sprintf(buf, "REST %"OFF_FMT"d", beg_range);
if (ftpcmd(buf, NULL, sfp, buf) == 350)
content_len -= beg_range;
}
if (ftpcmd("RETR ", target.path, sfp, buf) > 150)
bb_error_msg_and_die("bad response to %s: %s", "RETR", buf);
}
if (opt & WGET_OPT_SPIDER) {
if (ENABLE_FEATURE_CLEAN_UP)
fclose(sfp);
return EXIT_SUCCESS;
}
/*
* Retrieve file
*/
/* Do it before progressmeter (want to have nice error message) */
if (output_fd < 0) {
int o_flags = O_WRONLY | O_CREAT | O_TRUNC | O_EXCL;
/* compat with wget: -O FILE can overwrite */
if (opt & WGET_OPT_OUTNAME)
o_flags = O_WRONLY | O_CREAT | O_TRUNC;
output_fd = xopen(fname_out, o_flags);
}
if (!(opt & WGET_OPT_QUIET))
progressmeter(-1);
if (chunked)
goto get_clen;
/* Loops only if chunked */
while (1) {
while (content_len > 0 || !got_clen) {
int n;
unsigned rdsz = sizeof(buf);
if (content_len < sizeof(buf) && (chunked || got_clen))
rdsz = (unsigned)content_len;
n = safe_fread(buf, rdsz, dfp);
if (n <= 0) {
if (ferror(dfp)) {
/* perror will not work: ferror doesn't set errno */
bb_error_msg_and_die(bb_msg_read_error);
}
break;
}
xwrite(output_fd, buf, n);
#if ENABLE_FEATURE_WGET_STATUSBAR
transferred += n;
#endif
if (got_clen)
content_len -= n;
}
if (!chunked)
break;
safe_fgets(buf, sizeof(buf), dfp); /* This is a newline */
get_clen:
safe_fgets(buf, sizeof(buf), dfp);
content_len = STRTOOFF(buf, NULL, 16);
/* FIXME: error check? */
if (content_len == 0)
break; /* all done! */
}
if (!(opt & WGET_OPT_QUIET))
progressmeter(0);
if ((use_proxy == 0) && target.is_ftp) {
fclose(dfp);
if (ftpcmd(NULL, NULL, sfp, buf) != 226)
bb_error_msg_and_die("ftp error: %s", buf+4);
ftpcmd("QUIT", NULL, sfp, buf);
}
return EXIT_SUCCESS;
}