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ftpfs.c
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/*
FTP file system
Copyright (C) 2006 Robson Braga Araujo <[email protected]>
This program can be distributed under the terms of the GNU GPL.
See the file COPYING.
*/
#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <stdint.h>
#include <errno.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <netinet/in.h>
#include <fuse.h>
#include <fuse_opt.h>
#include <glib.h>
#include <semaphore.h>
#include <assert.h>
#include "charset_utils.h"
#include "path_utils.h"
#include "ftpfs-ls.h"
#include "cache.h"
#include "ftpfs.h"
#define CURLFTPFS_BAD_NOBODY 0x070f02
#define CURLFTPFS_BAD_SSL 0x070f03
#define CURLFTPFS_BAD_READ ((size_t)-1)
#define MAX_BUFFER_LEN (300*1024)
struct ftpfs ftpfs;
static char error_buf[CURL_ERROR_SIZE];
struct buffer {
uint8_t* p;
size_t len;
size_t size;
off_t begin_offset;
};
static void usage(const char* progname);
static void buf_init(struct buffer* buf)
{
buf->p = NULL;
buf->begin_offset = 0;
buf->len = 0;
buf->size = 0;
}
static inline void buf_free(struct buffer* buf)
{
free(buf->p);
}
static inline void buf_clear(struct buffer *buf)
{
buf_free(buf);
buf_init(buf);
}
static int buf_resize(struct buffer *buf, size_t len)
{
buf->size = (buf->len + len + 63) & ~31;
buf->p = (uint8_t *) realloc(buf->p, buf->size);
if (!buf->p) {
fprintf(stderr, "ftpfs: memory allocation failed\n");
return -1;
}
return 0;
}
static int buf_add_mem(struct buffer *buf, const void *data, size_t len)
{
if (buf->len + len > buf->size && buf_resize(buf, len) == -1)
return -1;
memcpy(buf->p + buf->len, data, len);
buf->len += len;
return 0;
}
static void buf_null_terminate(struct buffer *buf)
{
if (buf_add_mem(buf, "\0", 1) == -1)
exit(1);
}
struct ftpfs_file {
struct buffer buf;
int dirty;
int copied;
off_t last_offset;
int can_shrink;
pthread_t thread_id;
mode_t mode;
char * open_path;
char * full_path;
struct buffer stream_buf;
CURL *write_conn;
sem_t data_avail;
sem_t data_need;
sem_t data_written;
sem_t ready;
int isready;
int eof;
int written_flag;
int write_fail_cause;
int write_may_start;
char curl_error_buffer[CURL_ERROR_SIZE];
off_t pos;
};
enum {
KEY_HELP,
KEY_VERBOSE,
KEY_VERSION,
};
#define FTPFS_OPT(t, p, v) { t, offsetof(struct ftpfs, p), v }
static struct fuse_opt ftpfs_opts[] = {
FTPFS_OPT("ftpfs_debug=%u", debug, 0),
FTPFS_OPT("transform_symlinks", transform_symlinks, 1),
FTPFS_OPT("disable_epsv", disable_epsv, 1),
FTPFS_OPT("enable_epsv", disable_epsv, 0),
FTPFS_OPT("skip_pasv_ip", skip_pasv_ip, 1),
FTPFS_OPT("ftp_port=%s", ftp_port, 0),
FTPFS_OPT("disable_eprt", disable_eprt, 1),
FTPFS_OPT("ftp_method=%s", ftp_method, 0),
FTPFS_OPT("custom_list=%s", custom_list, 0),
FTPFS_OPT("tcp_nodelay", tcp_nodelay, 1),
FTPFS_OPT("connect_timeout=%u", connect_timeout, 0),
FTPFS_OPT("ssl", use_ssl, CURLFTPSSL_ALL),
FTPFS_OPT("ssl_control", use_ssl, CURLFTPSSL_CONTROL),
FTPFS_OPT("ssl_try", use_ssl, CURLFTPSSL_TRY),
FTPFS_OPT("no_verify_hostname", no_verify_hostname, 1),
FTPFS_OPT("no_verify_peer", no_verify_peer, 1),
FTPFS_OPT("cert=%s", cert, 0),
FTPFS_OPT("cert_type=%s", cert_type, 0),
FTPFS_OPT("key=%s", key, 0),
FTPFS_OPT("key_type=%s", key_type, 0),
FTPFS_OPT("pass=%s", key_password, 0),
FTPFS_OPT("engine=%s", engine, 0),
FTPFS_OPT("cacert=%s", cacert, 0),
FTPFS_OPT("capath=%s", capath, 0),
FTPFS_OPT("ciphers=%s", ciphers, 0),
FTPFS_OPT("interface=%s", interface, 0),
FTPFS_OPT("krb4=%s", krb4, 0),
FTPFS_OPT("proxy=%s", proxy, 0),
FTPFS_OPT("proxytunnel", proxytunnel, 1),
FTPFS_OPT("proxy_anyauth", proxyanyauth, 1),
FTPFS_OPT("proxy_basic", proxybasic, 1),
FTPFS_OPT("proxy_digest", proxydigest, 1),
FTPFS_OPT("proxy_ntlm", proxyntlm, 1),
FTPFS_OPT("httpproxy", proxytype, CURLPROXY_HTTP),
FTPFS_OPT("socks4", proxytype, CURLPROXY_SOCKS4),
FTPFS_OPT("socks5", proxytype, CURLPROXY_SOCKS5),
FTPFS_OPT("user=%s", user, 0),
FTPFS_OPT("proxy_user=%s", proxy_user, 0),
FTPFS_OPT("tlsv1", ssl_version, CURL_SSLVERSION_TLSv1),
FTPFS_OPT("sslv3", ssl_version, CURL_SSLVERSION_SSLv3),
FTPFS_OPT("ipv4", ip_version, CURL_IPRESOLVE_V4),
FTPFS_OPT("ipv6", ip_version, CURL_IPRESOLVE_V6),
FTPFS_OPT("utf8", tryutf8, 1),
FTPFS_OPT("codepage=%s", codepage, 0),
FTPFS_OPT("iocharset=%s", iocharset, 0),
FTPFS_OPT("nomulticonn", multiconn, 0),
FUSE_OPT_KEY("-h", KEY_HELP),
FUSE_OPT_KEY("--help", KEY_HELP),
FUSE_OPT_KEY("-v", KEY_VERBOSE),
FUSE_OPT_KEY("--verbose", KEY_VERBOSE),
FUSE_OPT_KEY("-V", KEY_VERSION),
FUSE_OPT_KEY("--version", KEY_VERSION),
FUSE_OPT_END
};
static struct ftpfs_file *get_ftpfs_file(struct fuse_file_info *fi)
{
return (struct ftpfs_file *) (uintptr_t) fi->fh;
}
static void cancel_previous_multi()
{
//curl_multi_cleanup(ftpfs.multi);
if (!ftpfs.attached_to_multi) return;
DEBUG(1, "cancel previous multi\n");
CURLMcode curlMCode = curl_multi_remove_handle(ftpfs.multi, ftpfs.connection);
if (curlMCode != CURLE_OK)
{
fprintf(stderr, "curl_multi_remove_handle problem: %d\n", curlMCode);
exit(1);
}
ftpfs.attached_to_multi = 0;
}
static int op_return(int err, char * operation)
{
if(!err)
{
DEBUG(2, "%s successful\n", operation);
return 0;
}
fprintf(stderr, "ftpfs: operation %s failed because %s\n", operation, strerror(-err));
return err;
}
static size_t write_data(void *ptr, size_t size, size_t nmemb, void *data) {
struct ftpfs_file* fh = (struct ftpfs_file*)data;
if (fh == NULL) return 0;
size_t to_copy = size * nmemb;
if (to_copy > fh->buf.len - fh->copied) {
to_copy = fh->buf.len - fh->copied;
}
DEBUG(2, "write_data: %zu\n", to_copy);
DEBUG(3, "%*s\n", (int)to_copy, (char*)ptr);
memcpy(ptr, fh->buf.p + fh->copied, to_copy);
fh->copied += to_copy;
return to_copy;
}
static size_t read_data(void *ptr, size_t size, size_t nmemb, void *data) {
struct buffer* buf = (struct buffer*)data;
if (buf == NULL) return size * nmemb;
if (buf_add_mem(buf, ptr, size * nmemb) == -1)
return 0;
DEBUG(2, "read_data: %zu\n", size * nmemb);
DEBUG(3, "%*s\n", (int)(size * nmemb), (char*)ptr);
return size * nmemb;
}
#define curl_easy_setopt_or_die(handle, option, ...) \
do {\
CURLcode res = curl_easy_setopt(handle, option, __VA_ARGS__);\
if (res != CURLE_OK) {\
fprintf(stderr, "Error setting curl: %s\n", error_buf);\
exit(1);\
}\
}while(0)
static int ftpfs_getdir(const char* path, fuse_cache_dirh_t h,
fuse_cache_dirfil_t filler) {
int err = 0;
CURLcode curl_res;
char* dir_path = get_fulldir_path(path);
DEBUG(1, "ftpfs_getdir: %s\n", dir_path);
struct buffer buf;
buf_init(&buf);
pthread_mutex_lock(&ftpfs.lock);
cancel_previous_multi();
curl_easy_setopt_or_die(ftpfs.connection, CURLOPT_URL, dir_path);
curl_easy_setopt_or_die(ftpfs.connection, CURLOPT_WRITEDATA, &buf);
curl_res = curl_easy_perform(ftpfs.connection);
pthread_mutex_unlock(&ftpfs.lock);
if (curl_res != 0) {
DEBUG(1, "%s\n", error_buf);
err = -EIO;
} else {
buf_null_terminate(&buf);
parse_dir((char*)buf.p, dir_path + strlen(ftpfs.host) - 1,
NULL, NULL, NULL, 0, h, filler);
}
free(dir_path);
buf_free(&buf);
return op_return(err, "ftpfs_getdir");
}
static int ftpfs_getattr(const char* path, struct stat* sbuf) {
int err;
CURLcode curl_res;
char* dir_path = get_dir_path(path);
DEBUG(2, "ftpfs_getattr: %s dir_path=%s\n", path, dir_path);
struct buffer buf;
buf_init(&buf);
pthread_mutex_lock(&ftpfs.lock);
cancel_previous_multi();
curl_easy_setopt_or_die(ftpfs.connection, CURLOPT_URL, dir_path);
curl_easy_setopt_or_die(ftpfs.connection, CURLOPT_WRITEDATA, &buf);
curl_res = curl_easy_perform(ftpfs.connection);
pthread_mutex_unlock(&ftpfs.lock);
if (curl_res != 0) {
DEBUG(1, "%s\n", error_buf);
}
buf_null_terminate(&buf);
char* name = strrchr(path, '/');
++name;
err = parse_dir((char*)buf.p, dir_path + strlen(ftpfs.host) - 1,
name, sbuf, NULL, 0, NULL, NULL);
free(dir_path);
buf_free(&buf);
if (err) return op_return(-ENOENT, "ftpfs_getattr");
return 0;
}
static int check_running() {
int running_handles = 0;
curl_multi_perform(ftpfs.multi, &running_handles);
return running_handles;
}
static size_t ftpfs_read_chunk(const char* full_path, char* rbuf,
size_t size, off_t offset,
struct fuse_file_info* fi,
int update_offset) {
int running_handles = 0;
int err = 0;
struct ftpfs_file* fh = get_ftpfs_file(fi);
DEBUG(2, "ftpfs_read_chunk: %s %p %zu %lld %p %p\n",
full_path, rbuf, size, offset, fi, fh);
pthread_mutex_lock(&ftpfs.lock);
DEBUG(2, "buffer size: %zu %lld\n", fh->buf.len, fh->buf.begin_offset);
if ((fh->buf.len < size + offset - fh->buf.begin_offset) ||
offset < fh->buf.begin_offset ||
offset > fh->buf.begin_offset + fh->buf.len) {
// We can't answer this from cache
if (ftpfs.current_fh != fh ||
offset < fh->buf.begin_offset ||
offset > fh->buf.begin_offset + fh->buf.len ||
!check_running()) {
DEBUG(1, "We need to restart the connection %p\n", ftpfs.connection);
DEBUG(2, "current_fh=%p fh=%p\n", ftpfs.current_fh, fh);
DEBUG(2, "buf.begin_offset=%lld offset=%lld\n", fh->buf.begin_offset, offset);
buf_clear(&fh->buf);
fh->buf.begin_offset = offset;
ftpfs.current_fh = fh;
cancel_previous_multi();
curl_easy_setopt_or_die(ftpfs.connection, CURLOPT_URL, full_path);
curl_easy_setopt_or_die(ftpfs.connection, CURLOPT_WRITEDATA, &fh->buf);
if (offset) {
char range[15];
snprintf(range, 15, "%lld-", (long long) offset);
curl_easy_setopt_or_die(ftpfs.connection, CURLOPT_RANGE, range);
}
CURLMcode curlMCode = curl_multi_add_handle(ftpfs.multi, ftpfs.connection);
if (curlMCode != CURLE_OK)
{
fprintf(stderr, "curl_multi_add_handle problem: %d\n", curlMCode);
exit(1);
}
ftpfs.attached_to_multi = 1;
}
while(CURLM_CALL_MULTI_PERFORM ==
curl_multi_perform(ftpfs.multi, &running_handles));
curl_easy_setopt_or_die(ftpfs.connection, CURLOPT_RANGE, NULL);
while ((fh->buf.len < size + offset - fh->buf.begin_offset) &&
running_handles) {
struct timeval timeout;
int rc; /* select() return code */
fd_set fdread;
fd_set fdwrite;
fd_set fdexcep;
int maxfd;
FD_ZERO(&fdread);
FD_ZERO(&fdwrite);
FD_ZERO(&fdexcep);
/* set a suitable timeout to play around with */
timeout.tv_sec = 1;
timeout.tv_usec = 0;
/* get file descriptors from the transfers */
curl_multi_fdset(ftpfs.multi, &fdread, &fdwrite, &fdexcep, &maxfd);
rc = select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);
if (rc == -1) {
err = 1;
break;
}
while(CURLM_CALL_MULTI_PERFORM ==
curl_multi_perform(ftpfs.multi, &running_handles));
}
if (running_handles == 0) {
int msgs_left = 1;
while (msgs_left) {
CURLMsg* msg = curl_multi_info_read(ftpfs.multi, &msgs_left);
if (msg == NULL ||
msg->msg != CURLMSG_DONE ||
msg->data.result != CURLE_OK) {
DEBUG(1, "error: curl_multi_info %d\n", msg->msg);
err = 1;
}
}
}
}
size_t to_copy = fh->buf.len + fh->buf.begin_offset - offset;
size = size > to_copy ? to_copy : size;
if (rbuf) {
memcpy(rbuf, fh->buf.p + offset - fh->buf.begin_offset, size);
}
if (update_offset) {
fh->last_offset = offset + size;
}
// Check if the buffer is growing and we can delete a part of it
if (fh->can_shrink && fh->buf.len > MAX_BUFFER_LEN) {
DEBUG(2, "Shrinking buffer from %zu to %zu bytes\n",
fh->buf.len, to_copy - size);
memmove(fh->buf.p,
fh->buf.p + offset - fh->buf.begin_offset + size,
to_copy - size);
fh->buf.len = to_copy - size;
fh->buf.begin_offset = offset + size;
}
pthread_mutex_unlock(&ftpfs.lock);
if (err) return CURLFTPFS_BAD_READ;
return size;
}
static void set_common_curl_stuff(CURL* easy);
static size_t write_data_bg(void *ptr, size_t size, size_t nmemb, void *data) {
struct ftpfs_file *fh = data;
unsigned to_copy = size * nmemb;
if (!fh->isready) {
sem_post(&fh->ready);
fh->isready = 1;
}
if (fh->stream_buf.len == 0 && fh->written_flag) {
sem_post(&fh->data_written); /* ftpfs_write can return */
}
sem_wait(&fh->data_avail);
DEBUG(2, "write_data_bg: data_avail eof=%d\n", fh->eof);
if (fh->eof)
return 0;
DEBUG(2, "write_data_bg: %d %zd\n", to_copy, fh->stream_buf.len);
if (to_copy > fh->stream_buf.len)
to_copy = fh->stream_buf.len;
memcpy(ptr, fh->stream_buf.p, to_copy);
if (fh->stream_buf.len > to_copy) {
size_t newlen = fh->stream_buf.len - to_copy;
memmove(fh->stream_buf.p, fh->stream_buf.p + to_copy, newlen);
fh->stream_buf.len = newlen;
sem_post(&fh->data_avail);
DEBUG(2, "write_data_bg: data_avail\n");
} else {
fh->stream_buf.len = 0;
fh->written_flag = 1;
sem_post(&fh->data_need);
DEBUG(2, "write_data_bg: data_need\n");
}
return to_copy;
}
int write_thread_ctr = 0;
static void *ftpfs_write_thread(void *data) {
struct ftpfs_file *fh = data;
char range[15];
DEBUG(2, "enter streaming write thread #%d path=%s pos=%lld\n", ++write_thread_ctr, fh->full_path, fh->pos);
curl_easy_setopt_or_die(fh->write_conn, CURLOPT_URL, fh->full_path);
curl_easy_setopt_or_die(fh->write_conn, CURLOPT_UPLOAD, 1);
curl_easy_setopt_or_die(fh->write_conn, CURLOPT_INFILESIZE, -1L);
curl_easy_setopt_or_die(fh->write_conn, CURLOPT_READFUNCTION, write_data_bg);
curl_easy_setopt_or_die(fh->write_conn, CURLOPT_READDATA, fh);
curl_easy_setopt_or_die(fh->write_conn, CURLOPT_LOW_SPEED_LIMIT, 1);
curl_easy_setopt_or_die(fh->write_conn, CURLOPT_LOW_SPEED_TIME, 60);
fh->curl_error_buffer[0] = '\0';
curl_easy_setopt_or_die(fh->write_conn, CURLOPT_ERRORBUFFER, fh->curl_error_buffer);
if (fh->pos > 0) {
/* resuming a streaming write */
//snprintf(range, 15, "%lld-", (long long) fh->pos);
//curl_easy_setopt_or_die(fh->write_conn, CURLOPT_RANGE, range);
curl_easy_setopt_or_die(fh->write_conn, CURLOPT_APPEND, 1);
//curl_easy_setopt_or_die(fh->write_conn, CURLOPT_RESUME_FROM_LARGE, (curl_off_t)fh->pos);
}
CURLcode curl_res = curl_easy_perform(fh->write_conn);
curl_easy_setopt_or_die(fh->write_conn, CURLOPT_UPLOAD, 0);
if (!fh->isready)
sem_post(&fh->ready);
if (curl_res != CURLE_OK)
{
DEBUG(1, "write problem: %d(%s) text=%s\n", curl_res, curl_easy_strerror(curl_res), fh->curl_error_buffer);
fh->write_fail_cause = curl_res;
/* problem - let ftpfs_write continue to avoid hang */
sem_post(&fh->data_need);
}
DEBUG(2, "leaving streaming write thread #%d curl_res=%d\n", write_thread_ctr--, curl_res);
sem_post(&fh->data_written); /* ftpfs_write may return */
return NULL;
}
/* returns 1 on success, 0 on failure */
static int start_write_thread(struct ftpfs_file *fh)
{
if (fh->write_conn != NULL)
{
fprintf(stderr, "assert fh->write_conn == NULL failed!\n");
exit(1);
}
fh->written_flag=0;
fh->isready=0;
fh->eof=0;
sem_init(&fh->data_avail, 0, 0);
sem_init(&fh->data_need, 0, 0);
sem_init(&fh->data_written, 0, 0);
sem_init(&fh->ready, 0, 0);
fh->write_conn = curl_easy_init();
if (fh->write_conn == NULL) {
fprintf(stderr, "Error initializing libcurl\n");
return 0;
} else {
int err;
set_common_curl_stuff(fh->write_conn);
err = pthread_create(&fh->thread_id, NULL, ftpfs_write_thread, fh);
if (err) {
fprintf(stderr, "failed to create thread: %s\n", strerror(err));
/* FIXME: destroy curl_easy */
return 0;
}
}
return 1;
}
static int finish_write_thread(struct ftpfs_file *fh)
{
if (fh->write_fail_cause == CURLE_OK)
{
sem_wait(&fh->data_need); /* only wait when there has been no error */
}
sem_post(&fh->data_avail);
fh->eof = 1;
pthread_join(fh->thread_id, NULL);
DEBUG(2, "finish_write_thread after pthread_join. write_fail_cause=%d\n", fh->write_fail_cause);
curl_easy_cleanup(fh->write_conn);
fh->write_conn = NULL;
sem_destroy(&fh->data_avail);
sem_destroy(&fh->data_need);
sem_destroy(&fh->data_written);
sem_destroy(&fh->ready);
if (fh->write_fail_cause != CURLE_OK)
{
return -EIO;
}
return 0;
}
static void free_ftpfs_file(struct ftpfs_file *fh) {
buf_free(&fh->buf);
buf_free(&fh->stream_buf);
if (fh->write_conn)
curl_easy_cleanup(fh->write_conn);
g_free(fh->full_path);
g_free(fh->open_path);
sem_destroy(&fh->data_avail);
sem_destroy(&fh->data_need);
sem_destroy(&fh->data_written);
sem_destroy(&fh->ready);
free(fh);
}
static int buffer_file(struct ftpfs_file *fh) {
// If we want to write to the file, we have to load it all at once,
// modify it in memory and then upload it as a whole as most FTP servers
// don't support resume for uploads.
pthread_mutex_lock(&ftpfs.lock);
cancel_previous_multi();
curl_easy_setopt_or_die(ftpfs.connection, CURLOPT_URL, fh->full_path);
curl_easy_setopt_or_die(ftpfs.connection, CURLOPT_WRITEDATA, &fh->buf);
CURLcode curl_res = curl_easy_perform(ftpfs.connection);
pthread_mutex_unlock(&ftpfs.lock);
if (curl_res != 0) {
return -EACCES;
}
return 0;
}
static int create_empty_file(const char * path)
{
int err = 0;
char *full_path = get_full_path(path);
pthread_mutex_lock(&ftpfs.lock);
cancel_previous_multi();
curl_easy_setopt_or_die(ftpfs.connection, CURLOPT_URL, full_path);
curl_easy_setopt_or_die(ftpfs.connection, CURLOPT_INFILESIZE, 0);
curl_easy_setopt_or_die(ftpfs.connection, CURLOPT_UPLOAD, 1);
curl_easy_setopt_or_die(ftpfs.connection, CURLOPT_READDATA, NULL);
CURLcode curl_res = curl_easy_perform(ftpfs.connection);
curl_easy_setopt_or_die(ftpfs.connection, CURLOPT_UPLOAD, 0);
pthread_mutex_unlock(&ftpfs.lock);
if (curl_res != 0) {
err = -EPERM;
}
free(full_path);
return err;
}
static int ftpfs_mknod(const char* path, mode_t mode, dev_t rdev);
static int ftpfs_chmod(const char* path, mode_t mode);
static char * flags_to_string(int flags)
{
char * access_mode_str = NULL;
if ((flags & O_ACCMODE) == O_WRONLY)
access_mode_str = "O_WRONLY";
else if ((flags & O_ACCMODE) == O_RDWR)
access_mode_str = "O_RDWR";
else if ((flags & O_ACCMODE) == O_RDONLY)
access_mode_str = "O_RDONLY";
return g_strdup_printf("access_mode=%s, flags=%s%s%s%s",
access_mode_str,
(flags & O_CREAT) ? "O_CREAT " : "",
(flags & O_TRUNC) ? "O_TRUNC " : "",
(flags & O_EXCL) ? "O_EXCL " : "",
(flags & O_APPEND) ? "O_APPEND " : "");
}
static int test_exists(const char* path)
{
struct stat sbuf;
return ftpfs_getattr(path, &sbuf);
}
static __off_t test_size(const char* path)
{
struct stat sbuf;
int err = ftpfs_getattr(path, &sbuf);
if (err)
return err;
return sbuf.st_size;
}
static int ftpfs_open_common(const char* path, mode_t mode,
struct fuse_file_info* fi) {
char * flagsAsStr = flags_to_string(fi->flags);
DEBUG(2, "ftpfs_open_common: %s\n", flagsAsStr);
int err = 0;
struct ftpfs_file* fh =
(struct ftpfs_file*) malloc(sizeof(struct ftpfs_file));
memset(fh, 0, sizeof(*fh));
buf_init(&fh->buf);
fh->mode = mode;
fh->dirty = 0;
fh->copied = 0;
fh->last_offset = 0;
fh->can_shrink = 0;
buf_init(&fh->stream_buf);
/* sem_init(&fh->data_avail, 0, 0);
sem_init(&fh->data_need, 0, 0);
sem_init(&fh->data_written, 0, 0);
sem_init(&fh->ready, 0, 0); */
fh->open_path = strdup(path);
fh->full_path = get_full_path(path);
fh->written_flag = 0;
fh->write_fail_cause = CURLE_OK;
fh->curl_error_buffer[0] = '\0';
fh->write_may_start = 0;
fi->fh = (unsigned long) fh;
if ((fi->flags & O_ACCMODE) == O_RDONLY) {
if (fi->flags & O_CREAT) {
err = ftpfs_mknod(path, (mode & 07777) | S_IFREG, 0);
} else {
// If it's read-only, we can load the file a bit at a time, as necessary.
DEBUG(1, "opening %s O_RDONLY\n", path);
fh->can_shrink = 1;
size_t size = ftpfs_read_chunk(fh->full_path, NULL, 1, 0, fi, 0);
if (size == CURLFTPFS_BAD_READ) {
DEBUG(1, "initial read failed size=%d\n", size);
err = -EACCES;
}
}
}
else if ((fi->flags & O_ACCMODE) == O_RDWR || (fi->flags & O_ACCMODE) == O_WRONLY)
{
#ifndef CURLFTPFS_O_RW_WORKAROUND
if ((fi->flags & O_ACCMODE) == O_RDWR)
{
err = -ENOTSUP;
goto fin;
}
#endif
if ((fi->flags & O_APPEND))
{
DEBUG(1, "opening %s with O_APPEND - not supported!\n", path);
err = -ENOTSUP;
}
if ((fi->flags & O_EXCL))
{
DEBUG(1, "opening %s with O_EXCL - testing existence\n", path);
int exists_r = test_exists(path);
if (exists_r != -ENOENT)
err = -EACCES;
}
if (!err)
{
if ((fi->flags & O_CREAT) || (fi->flags & O_TRUNC))
{
DEBUG(1, "opening %s for writing with O_CREAT or O_TRUNC. write thread will start now\n", path);
fh->write_may_start=1;
if (start_write_thread(fh))
{
sem_wait(&fh->ready);
/* chmod makes only sense on O_CREAT */
if (fi->flags & O_CREAT) ftpfs_chmod(path, mode);
sem_post(&fh->data_need);
}
else
{
err = -EIO;
}
}
else
{
/* in this case we have to start writing later */
DEBUG(1, "opening %s for writing without O_CREAT or O_TRUNC. write thread will start after ftruncate\n", path);
/* expecting ftruncate */
fh->write_may_start=0;
}
}
} else {
err = -EIO;
}
fin:
if (err)
free_ftpfs_file(fh);
g_free(flagsAsStr);
return op_return(err, "ftpfs_open");
}
static int ftpfs_open(const char* path, struct fuse_file_info* fi) {
return ftpfs_open_common(path, 0, fi);
}
#if FUSE_VERSION >= 25
static int ftpfs_create(const char* path, mode_t mode,
struct fuse_file_info* fi) {
return ftpfs_open_common(path, mode, fi);
}
#endif
static int ftpfs_read(const char* path, char* rbuf, size_t size, off_t offset,
struct fuse_file_info* fi) {
int ret;
struct ftpfs_file *fh = get_ftpfs_file(fi);
DEBUG(1, "ftpfs_read: %s size=%zu offset=%lld has_write_conn=%d pos=%lld\n", path, size, (long long) offset, fh->write_conn!=0, fh->pos);
if (fh->pos>0 || fh->write_conn!=NULL)
{
fprintf(stderr, "in read/write mode we cannot read from a file that has already been written to\n");
return op_return(-EIO, "ftpfs_read");
}
char *full_path = get_full_path(path);
size_t size_read = ftpfs_read_chunk(full_path, rbuf, size, offset, fi, 1);
free(full_path);
if (size_read == CURLFTPFS_BAD_READ) {
ret = -EIO;
} else {
ret = size_read;
}
if (ret<0) op_return(ret, "ftpfs_read");
return ret;
}
static int ftpfs_mknod(const char* path, mode_t mode, dev_t rdev) {
(void) rdev;
int err = 0;
DEBUG(1, "ftpfs_mknode: mode=%d\n", (int)mode);
if ((mode & S_IFMT) != S_IFREG)
return -EPERM;
err = create_empty_file(path);
if (!err)
ftpfs_chmod(path, mode);
return op_return(err, "ftpfs_mknod");
}
static int ftpfs_chmod(const char* path, mode_t mode) {
int err = 0;
// We can only process a subset of the mode - so strip
// to supported subset
int mode_c = mode - (mode / 0x1000 * 0x1000);
struct curl_slist* header = NULL;
char* full_path = get_dir_path(path);
char* filename = get_file_name(path);
char* cmd = g_strdup_printf("SITE CHMOD %.3o %s", mode_c, filename);
struct buffer buf;
buf_init(&buf);
header = curl_slist_append(header, cmd);
pthread_mutex_lock(&ftpfs.lock);
cancel_previous_multi();
curl_easy_setopt_or_die(ftpfs.connection, CURLOPT_POSTQUOTE, header);
curl_easy_setopt_or_die(ftpfs.connection, CURLOPT_URL, full_path);
curl_easy_setopt_or_die(ftpfs.connection, CURLOPT_WRITEDATA, &buf);
curl_easy_setopt_or_die(ftpfs.connection, CURLOPT_NOBODY, ftpfs.safe_nobody);
CURLcode curl_res = curl_easy_perform(ftpfs.connection);
curl_easy_setopt_or_die(ftpfs.connection, CURLOPT_POSTQUOTE, NULL);
curl_easy_setopt_or_die(ftpfs.connection, CURLOPT_NOBODY, 0);
pthread_mutex_unlock(&ftpfs.lock);
if (curl_res != 0) {
err = -EPERM;
}
buf_free(&buf);
curl_slist_free_all(header);
free(full_path);
free(filename);
free(cmd);
return op_return(err, "ftpfs_chmod");
}
static int ftpfs_chown(const char* path, uid_t uid, gid_t gid) {
int err = 0;
DEBUG(1, "ftpfs_chown: %d %d\n", (int)uid, (int)gid);
struct curl_slist* header = NULL;
char* full_path = get_dir_path(path);
char* filename = get_file_name(path);
char* cmd = g_strdup_printf("SITE CHUID %i %s", uid, filename);
char* cmd2 = g_strdup_printf("SITE CHGID %i %s", gid, filename);
struct buffer buf;
buf_init(&buf);
header = curl_slist_append(header, cmd);
header = curl_slist_append(header, cmd2);
pthread_mutex_lock(&ftpfs.lock);
cancel_previous_multi();
curl_easy_setopt_or_die(ftpfs.connection, CURLOPT_POSTQUOTE, header);
curl_easy_setopt_or_die(ftpfs.connection, CURLOPT_URL, full_path);
curl_easy_setopt_or_die(ftpfs.connection, CURLOPT_WRITEDATA, &buf);
curl_easy_setopt_or_die(ftpfs.connection, CURLOPT_NOBODY, ftpfs.safe_nobody);
CURLcode curl_res = curl_easy_perform(ftpfs.connection);
curl_easy_setopt_or_die(ftpfs.connection, CURLOPT_POSTQUOTE, NULL);
curl_easy_setopt_or_die(ftpfs.connection, CURLOPT_NOBODY, 0);
pthread_mutex_unlock(&ftpfs.lock);
if (curl_res != 0) {
err = -EPERM;
}
buf_free(&buf);
curl_slist_free_all(header);
free(full_path);
free(filename);
free(cmd);
free(cmd2);
return op_return(err, "ftpfs_chown");
}
static int ftpfs_truncate(const char* path, off_t offset) {
DEBUG(1, "ftpfs_truncate: %s len=%lld\n", path, offset);
/* we can't use ftpfs_mknod here, because we don't know the right permissions */
if (offset == 0) return op_return(create_empty_file(path), "ftpfs_truncate");
/* fix openoffice problem, truncating exactly to file length */
__off_t size = (long long int)test_size(path);
DEBUG(1, "ftpfs_truncate: %s check filesize=%lld\n", path, (long long int)size);
if (offset == size)
return op_return(0, "ftpfs_ftruncate");
DEBUG(1, "ftpfs_truncate problem: %s offset != 0 or filesize=%lld != offset\n", path, (long long int)size);
return op_return(-EPERM, "ftpfs_truncate");
}
static int ftpfs_ftruncate(const char * path , off_t offset, struct fuse_file_info * fi)
{
DEBUG(1, "ftpfs_ftruncate: %s len=%lld\n", path, offset);
struct ftpfs_file *fh = get_ftpfs_file(fi);
if (offset == 0)
{
if (fh->pos == 0)
{
fh->write_may_start=1;
return op_return(create_empty_file(fh->open_path), "ftpfs_ftruncate");
}
return op_return(-EPERM, "ftpfs_ftruncate");
}
/* fix openoffice problem, truncating exactly to file length */
__off_t size = test_size(path);
DEBUG(1, "ftpfs_ftruncate: %s check filesize=%lld\n", path, (long long int)size);
if (offset == size)
return op_return(0, "ftpfs_ftruncate");
DEBUG(1, "ftpfs_ftruncate problem: %s offset != 0 or filesize(=%lld) != offset(=%lld)\n", path, (long long int)size, (long long int) offset);
return op_return(-EPERM, "ftpfs_ftruncate");
}
static int ftpfs_utime(const char* path, struct utimbuf* time) {
(void) path;
(void) time;
return op_return(0, "ftpfs_utime");
}
static int ftpfs_rmdir(const char* path) {