mirrors/mc
1
0
Fork 0
mirror of https://github.com/MidnightCommander/mc synced 2024-12-22 20:36:50 +03:00
Code Issues Packages Projects Releases Wiki Activity
1d8ef0b089
mc/vfs/fish.c
Sergei Trofimovich c825c379c4 fish: cleanup: unboxed quoted strings when generate shell commands 
Signed-off-by: Sergei Trofimovich <st@anti-virus.by>
2009-01-28 10:29:18 +02:00

1118 lines
30 KiB
C
Raw Blame History

/* Virtual File System: FISH implementation for transfering files over
shell connections.
Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
2007 Free Software Foundation, Inc.
Written by: 1998 Pavel Machek
Spaces fix: 2000 Michal Svec
Derived from ftpfs.c.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License
as published by the Free Software Foundation; either version 2 of
the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
/*
* Read README.fish for protocol specification.
*
* Syntax of path is: /#sh:user@host[:Cr]/path
* where C means you want compressed connection,
* and r means you want to use rsh
*
* Namespace: fish_vfs_ops exported.
*/
/* Define this if your ssh can take -I option */
#include <config.h>
#include <errno.h>
#include "../src/global.h"
#include "../src/tty.h" /* enable/disable interrupt key */
#include "../src/wtools.h" /* message() */
#include "../src/main.h" /* print_vfs_message */
#include "utilvfs.h"
#include "xdirentry.h"
#include "vfs.h"
#include "vfs-impl.h"
#include "gc.h" /* vfs_stamp_create */
#include "tcputil.h"
#include "../src/unixcompat.h"
#include "fish.h"
#include "../mhl/memory.h"
#include "../mhl/string.h"
#include "../mhl/escape.h"
int fish_directory_timeout = 900;
#define DO_RESOLVE_SYMLINK 1
#define DO_OPEN 2
#define DO_FREE_RESOURCE 4
#define FISH_FLAG_COMPRESSED 1
#define FISH_FLAG_RSH 2
#define OPT_FLUSH 1
#define OPT_IGNORE_ERROR 2
/*
* Reply codes.
*/
#define PRELIM 1 /* positive preliminary */
#define COMPLETE 2 /* positive completion */
#define CONTINUE 3 /* positive intermediate */
#define TRANSIENT 4 /* transient negative completion */
#define ERROR 5 /* permanent negative completion */
/* command wait_flag: */
#define NONE 0x00
#define WAIT_REPLY 0x01
#define WANT_STRING 0x02
static char reply_str [80];
static struct vfs_class vfs_fish_ops;
static int
fish_command (struct vfs_class *me, struct vfs_s_super *super,
int wait_reply, const char *fmt, ...)
__attribute__ ((format (__printf__, 4, 5)));
static int fish_decode_reply (char *s, int was_garbage)
{
int code;
if (!sscanf(s, "%d", &code)) {
code = 500;
return 5;
}
if (code<100) return was_garbage ? ERROR : (!code ? COMPLETE : PRELIM);
return code / 100;
}
/* Returns a reply code, check /usr/include/arpa/ftp.h for possible values */
static int fish_get_reply (struct vfs_class *me, int sock, char *string_buf, int string_len)
{
char answer[1024];
int was_garbage = 0;
for (;;) {
if (!vfs_s_get_line(me, sock, answer, sizeof(answer), '\n')) {
if (string_buf)
*string_buf = 0;
return 4;
}
if (strncmp(answer, "### ", 4)) {
was_garbage = 1;
if (string_buf)
g_strlcpy(string_buf, answer, string_len);
} else return fish_decode_reply(answer+4, was_garbage);
}
}
#define SUP super->u.fish
static int
fish_command (struct vfs_class *me, struct vfs_s_super *super,
int wait_reply, const char *fmt, ...)
{
va_list ap;
char *str;
int status;
FILE *logfile = MEDATA->logfile;
va_start (ap, fmt);
str = g_strdup_vprintf (fmt, ap);
va_end (ap);
if (logfile) {
fwrite (str, strlen (str), 1, logfile);
fflush (logfile);
}
enable_interrupt_key ();
status = write (SUP.sockw, str, strlen (str));
mhl_mem_free (str);
disable_interrupt_key ();
if (status < 0)
return TRANSIENT;
if (wait_reply)
return fish_get_reply (me, SUP.sockr,
(wait_reply & WANT_STRING) ? reply_str :
NULL, sizeof (reply_str) - 1);
return COMPLETE;
}
static void
fish_free_archive (struct vfs_class *me, struct vfs_s_super *super)
{
if ((SUP.sockw != -1) || (SUP.sockr != -1)) {
print_vfs_message (_("fish: Disconnecting from %s"),
super->name ? super->name : "???");
fish_command (me, super, NONE, "#BYE\nexit\n");
close (SUP.sockw);
close (SUP.sockr);
SUP.sockw = SUP.sockr = -1;
}
mhl_mem_free (SUP.host);
mhl_mem_free (SUP.user);
mhl_mem_free (SUP.cwdir);
mhl_mem_free (SUP.password);
}
static void
fish_pipeopen(struct vfs_s_super *super, const char *path, const char *argv[])
{
int fileset1[2], fileset2[2];
int res;
if ((pipe(fileset1)<0) || (pipe(fileset2)<0))
vfs_die("Cannot pipe(): %m.");
if ((res = fork())) {
if (res<0) vfs_die("Cannot fork(): %m.");
/* We are the parent */
close(fileset1[0]);
SUP.sockw = fileset1[1];
close(fileset2[1]);
SUP.sockr = fileset2[0];
} else {
close(0);
dup(fileset1[0]);
close(fileset1[0]); close(fileset1[1]);
close(1); close(2);
dup(fileset2[1]);
/* stderr to /dev/null */
open ("/dev/null", O_WRONLY);
close(fileset2[0]); close(fileset2[1]);
execvp(path, const_cast(char **, argv));
_exit(3);
}
}
/* The returned directory should always contain a trailing slash */
static char *fish_getcwd(struct vfs_class *me, struct vfs_s_super *super)
{
if (fish_command (me, super, WANT_STRING, "#PWD\npwd; echo '### 200'\n") == COMPLETE)
return g_strconcat (reply_str, "/", (char *) NULL);
ERRNOR (EIO, NULL);
}
static int
fish_open_archive_int (struct vfs_class *me, struct vfs_s_super *super)
{
{
const char *argv[10];
const char *xsh = (SUP.flags == FISH_FLAG_RSH ? "rsh" : "ssh");
int i = 0;
argv[i++] = xsh;
if (SUP.flags == FISH_FLAG_COMPRESSED)
argv[i++] = "-C";
argv[i++] = "-l";
argv[i++] = SUP.user;
argv[i++] = SUP.host;
argv[i++] = "echo FISH:; /bin/sh";
argv[i++] = NULL;
fish_pipeopen (super, xsh, argv);
}
{
char answer[2048];
print_vfs_message (_("fish: Waiting for initial line..."));
if (!vfs_s_get_line (me, SUP.sockr, answer, sizeof (answer), ':'))
ERRNOR (E_PROTO, -1);
print_vfs_message ("%s", answer);
if (strstr (answer, "assword")) {
/* Currently, this does not work. ssh reads passwords from
/dev/tty, not from stdin :-(. */
message (1, MSG_ERROR,
_
("Sorry, we cannot do password authenticated connections for now."));
ERRNOR (EPERM, -1);
if (!SUP.password) {
char *p, *op;
p = g_strconcat (_(" fish: Password required for "),
SUP.user, " ", (char *) NULL);
op = vfs_get_password (p);
mhl_mem_free (p);
if (op == NULL)
ERRNOR (EPERM, -1);
SUP.password = op;
}
print_vfs_message (_("fish: Sending password..."));
write (SUP.sockw, SUP.password, strlen (SUP.password));
write (SUP.sockw, "\n", 1);
}
}
print_vfs_message (_("fish: Sending initial line..."));
/*
* Run `start_fish_server'. If it doesn't exist - no problem,
* we'll talk directly to the shell.
*/
if (fish_command
(me, super, WAIT_REPLY,
"#FISH\necho; start_fish_server 2>&1; echo '### 200'\n") !=
COMPLETE)
ERRNOR (E_PROTO, -1);
print_vfs_message (_("fish: Handshaking version..."));
if (fish_command
(me, super, WAIT_REPLY,
"#VER 0.0.0\necho '### 000'\n") != COMPLETE)
ERRNOR (E_PROTO, -1);
/* Set up remote locale to C, otherwise dates cannot be recognized */
if (fish_command
(me, super, WAIT_REPLY,
"LANG=C; LC_ALL=C; LC_TIME=C\n"
"export LANG; export LC_ALL; export LC_TIME\n" "echo '### 200'\n")
!= COMPLETE)
ERRNOR (E_PROTO, -1);
print_vfs_message (_("fish: Setting up current directory..."));
SUP.cwdir = fish_getcwd (me, super);
print_vfs_message (_("fish: Connected, home %s."), SUP.cwdir);
#if 0
super->name =
g_strconcat ("/#sh:", SUP.user, "@", SUP.host, "/", (char *) NULL);
#endif
super->name = g_strdup (PATH_SEP_STR);
super->root =
vfs_s_new_inode (me, super,
vfs_s_default_stat (me, S_IFDIR | 0755));
return 0;
}
static int
fish_open_archive (struct vfs_class *me, struct vfs_s_super *super,
const char *archive_name, char *op)
{
char *host, *user, *password, *p;
int flags;
(void) archive_name;
p = vfs_split_url (strchr (op, ':') + 1, &host, &user, &flags,
&password, 0, URL_NOSLASH);
mhl_mem_free (p);
SUP.host = host;
SUP.user = user;
SUP.flags = flags;
if (!strncmp (op, "rsh:", 4))
SUP.flags |= FISH_FLAG_RSH;
SUP.cwdir = NULL;
if (password)
SUP.password = password;
return fish_open_archive_int (me, super);
}
static int
fish_archive_same (struct vfs_class *me, struct vfs_s_super *super,
const char *archive_name, char *op, void *cookie)
{
char *host, *user;
int flags;
(void) me;
(void) archive_name;
(void) cookie;
op = vfs_split_url (strchr (op, ':') + 1, &host, &user, &flags, 0, 0,
URL_NOSLASH);
mhl_mem_free (op);
flags = ((strcmp (host, SUP.host) == 0)
&& (strcmp (user, SUP.user) == 0) && (flags == SUP.flags));
mhl_mem_free (host);
mhl_mem_free (user);
return flags;
}
static int
fish_dir_load(struct vfs_class *me, struct vfs_s_inode *dir, char *remote_path)
{
struct vfs_s_super *super = dir->super;
char buffer[8192];
struct vfs_s_entry *ent = NULL;
FILE *logfile;
SHELL_ESCAPED_STR quoted_path;
int reply_code;
#if 0
/*
* Simple FISH debug interface :]
*/
if (!(MEDATA->logfile))
{
MEDATA->logfile = fopen("/tmp/mc-FISH.sh", "w");
}
#endif // 0
logfile = MEDATA->logfile;
print_vfs_message(_("fish: Reading directory %s..."), remote_path);
gettimeofday(&dir->timestamp, NULL);
dir->timestamp.tv_sec += fish_directory_timeout;
quoted_path = mhl_shell_escape_dup (remote_path);
fish_command (me, super, NONE,
"#LIST /%s\n"
"if `perl -v > /dev/null 2>&1` ; then\n"
"perl -e '\n"
"use strict;\n"
"use POSIX;\n"
"use Fcntl;\n"
"use POSIX \":fcntl_h\"; #S_ISLNK was here until 5.6\n"
"import Fcntl \":mode\" unless defined &S_ISLNK; #and is now here\n"
"my $dirname = $ARGV[0];\n"
"if (opendir ( DIR, $dirname )) {\n"
"while( (my $filename = readdir(DIR))){\n"
"my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,$atime,$mtime,$ctime,$blksize,$blocks) = lstat(\"$dirname/$filename\");\n"
"my $mloctime= scalar localtime $mtime;\n"
"my $shell_escape_regex= s/([;<>\\*\\|`&\\$!#\\(\\)\\[\\]\\{\\}:'\\''\"\\ \\\\])/\\\\$1/g;\n"
"my $e_filename = $filename;\n"
"$e_filename =~ $shell_escape_regex;\n"
"if (S_ISLNK($mode) ) {\n"
"my $linkname = readlink (\"$dirname/$filename\");\n"
"$linkname =~ $shell_escape_regex;\n"
"\n"
"printf(\"R%%o %%o $uid.$gid\\n"
"S$size\\n"
"d$mloctime\\n"
":\\\"$e_filename\\\" -> \\\"$linkname\\\"\\n"
"\\n\", S_IMODE($mode), S_IFMT($mode));\n"
"} else {\n"
"printf(\"R%%o %%o $uid.$gid\\n"
"S$size\\n"
"d$mloctime\\n"
":\\\"$e_filename\\\"\\n"
"\\n\", S_IMODE($mode), S_IFMT($mode));\n"
"}}\n"
"printf(\"### 200\\n\");\n"
"closedir(DIR);\n"
"} else {\n"
"printf(\"### 500\\n\");\n"
"}\n"
"exit 0\n"
"' /%s ||\n" /* ARGV[0] - path to browse */
" echo '### 500'\n" /* do not hang if perl is to eval it */
"elif `ls -1 /%s >/dev/null 2>&1` ; then\n"
"if `ls -Q /%s >/dev/null 2>&1`; then\n"
"LSOPT=\"-Qlan\";\n"
"ADD=0;\n"
"else\n"
"LSOPT=\"-lan\";\n"
"ADD=1;\n"
"fi\n"
"ls $LSOPT \"/%s\" 2>/dev/null | grep '^[^cbt]' | (\n"
"while read p l u g s m d y n; do\n"
"if [ $ADD = 0 ]; then\n"
"echo \"P$p $u.$g\nS$s\nd$m $d $y\n:$n\n\"\n"
"elif `sed --version >/dev/null 2>&1` ; then\n"
"file=`echo $n | sed -e 's#^\\(.*\\) -> \\(.*\\)#\\1\" -> \"\\2#'`\n"
"echo \"P$p $u $g\nS$s\nd$m $d $y\n:\"$file\"\n\"\n"
"else\n"
"echo \"P$p $u $g\nS$s\nd$m $d $y\n:\"$n\"\n\"\n"
"fi\n"
"done )\n"
"ls $LSOPT /%s 2>/dev/null | grep '^[cb]' | (\n"
"while read p l u g a i m d y n; do\n"
"if [ $ADD = 0 ]; then\n"
"echo \"P$p $u.$g\nE$a$i\nd$m $d $y\n:$n\n\"\n"
"elif `sed --version >/dev/null 2>&1` ; then\n"
"file=`echo $n | sed -e 's#^\\(.*\\) -> \\(.*\\)#\\1\" -> \"\\2#'`\n"
"echo \"P$p $u $g\nS$s\nd$m $d $y\n:\"$file\"\n\"\n"
"else\n"
"echo \"P$p $u $g\nS$s\nd$m $d $y\n:\"$n\"\n\"\n"
"fi\n"
"done)\n"
"echo '### 200'\n"
"else\n"
"echo '### 500'\n"
"fi\n",
quoted_path.s, quoted_path.s, quoted_path.s, quoted_path.s, quoted_path.s, quoted_path.s);
mhl_mem_free (quoted_path.s);
ent = vfs_s_generate_entry(me, NULL, dir, 0);
while (1) {
int res = vfs_s_get_line_interruptible (me, buffer, sizeof (buffer), SUP.sockr);
if ((!res) || (res == EINTR)) {
vfs_s_free_entry(me, ent);
me->verrno = ECONNRESET;
goto error;
}
if (logfile) {
fputs (buffer, logfile);
fputs ("\n", logfile);
fflush (logfile);
}
if (!strncmp(buffer, "### ", 4))
break;
if ((!buffer[0])) {
if (ent->name) {
vfs_s_insert_entry(me, dir, ent);
ent = vfs_s_generate_entry(me, NULL, dir, 0);
}
continue;
}
#define ST ent->ino->st
switch(buffer[0]) {
case ':': {
char *data_start = buffer+1;
char *filename = data_start;
char *linkname = data_start;
char *filename_bound = filename + strlen(filename);
char *linkname_bound = filename_bound;
if (!strcmp(data_start, "\".\"") || !strcmp(data_start, "\"..\""))
break; /* We'll do "." and ".." ourselves */
if (S_ISLNK(ST.st_mode)) {
// we expect: "escaped-name" -> "escaped-name"
// -> cannot occur in filenames,
// because it will be escaped to -\>
if (*filename == '"')
++filename;
linkname = strstr(filename, "\" -> \"");
if (!linkname)
{
/* broken client, or smth goes wrong */
linkname = filename_bound;
if (filename_bound > filename
&& *(filename_bound - 1) == '"')
--filename_bound; // skip trailing "
}
else
{
filename_bound = linkname;
linkname += 6; // strlen ("\" -> \"")
if (*(linkname_bound - 1) == '"')
--linkname_bound; // skip trailing "
}
ent->name = mhl_str_dup_range(filename, filename_bound);
mhl_shell_unescape_buf(ent->name);
ent->ino->linkname = mhl_str_dup_range(linkname, linkname_bound);
mhl_shell_unescape_buf(ent->ino->linkname);
} else {
// we expect: "escaped-name"
if (filename_bound - filename > 2)
{
// there is at least 2 "
// and we skip them
if (*filename == '"')
++filename;
if (*(filename_bound - 1) == '"')
--filename_bound;
}
ent->name = mhl_str_dup_range(filename, filename_bound);
mhl_shell_unescape_buf(ent->name);
}
break;
}
case 'S':
#ifdef HAVE_ATOLL
ST.st_size = (off_t) atoll (buffer+1);
#else
ST.st_size = (off_t) atof (buffer+1);
#endif
break;
case 'P': {
size_t skipped;
vfs_parse_filemode (buffer + 1, &skipped, &ST.st_mode);
break;
}
case 'R': {
// raw filemode:
// we expect: Roctal-filemode octal-filetype uid.gid
size_t skipped;
vfs_parse_raw_filemode (buffer + 1, &skipped, &ST.st_mode);
break;
}
case 'd': {
vfs_split_text(buffer+1);
if (!vfs_parse_filedate(0, &ST.st_ctime))
break;
ST.st_atime = ST.st_mtime = ST.st_ctime;
}
break;
case 'D': {
struct tm tim;
if (sscanf(buffer+1, "%d %d %d %d %d %d", &tim.tm_year, &tim.tm_mon,
&tim.tm_mday, &tim.tm_hour, &tim.tm_min, &tim.tm_sec) != 6)
break;
ST.st_atime = ST.st_mtime = ST.st_ctime = mktime(&tim);
}
break;
case 'E': {
int maj, min;
if (sscanf(buffer+1, "%d,%d", &maj, &min) != 2)
break;
#ifdef HAVE_STRUCT_STAT_ST_RDEV
ST.st_rdev = makedev (maj, min);
#endif
}
}
}
vfs_s_free_entry (me, ent);
reply_code = fish_decode_reply(buffer + 4, 0);
if (reply_code == COMPLETE) {
mhl_mem_free (SUP.cwdir);
SUP.cwdir = g_strdup (remote_path);
print_vfs_message (_("%s: done."), me->name);
return 0;
} else if (reply_code == ERROR) {
me->verrno = EACCES;
} else {
me->verrno = E_REMOTE;
}
error:
print_vfs_message (_("%s: failure"), me->name);
return -1;
}
static int
fish_file_store(struct vfs_class *me, struct vfs_s_fh *fh, char *name, char *localname)
{
struct vfs_s_super *super = FH_SUPER;
int n, total;
char buffer[8192];
struct stat s;
int was_error = 0;
int h;
SHELL_ESCAPED_STR quoted_name;
h = open (localname, O_RDONLY);
if (h == -1)
ERRNOR (EIO, -1);
if (fstat(h, &s)<0) {
close (h);
ERRNOR (EIO, -1);
}
/* First, try this as stor:
*
* ( head -c number ) | ( cat > file; cat >/dev/null )
*
* If `head' is not present on the remote system, `dd' will be used.
* Unfortunately, we cannot trust most non-GNU `head' implementations
* even if `-c' options is supported. Therefore, we separate GNU head
* (and other modern heads?) using `-q' and `-' . This causes another
* implementations to fail (because of "incorrect options").
*
* Fallback is:
*
* rest=<number>
* while [ $rest -gt 0 ]
* do
* cnt=`expr \( $rest + 255 \) / 256`
* n=`dd bs=256 count=$cnt | tee -a <target_file> | wc -c`
* rest=`expr $rest - $n`
* done
*
* `dd' was not designed for full filling of input buffers,
* and does not report exact number of bytes (not blocks).
* Therefore a more complex shell script is needed.
*
* On some systems non-GNU head writes "Usage:" error report to stdout
* instead of stderr. It makes impossible the use of "head || dd"
* algorithm for file appending case, therefore just "dd" is used for it.
*/
quoted_name = mhl_shell_escape_dup(name);
print_vfs_message(_("fish: store %s: sending command..."), quoted_name.s );
/* FIXME: File size is limited to ULONG_MAX */
if (!fh->u.fish.append)
n = fish_command (me, super, WAIT_REPLY,
"#STOR %lu /%s\n"
"echo '### 001'\n"
"file=/%s\n"
"res=`exec 3>&1\n"
"(\n"
"head -c %lu -q - || echo DD >&3\n"
") 2>/dev/null | (\n"
"cat > $file\n"
"cat > /dev/null\n"
")`; [ \"$res\" = DD ] && {\n"
"> \"$file\"\n"
"rest=%lu\n"
"while [ $rest -gt 0 ]\n"
"do\n"
" cnt=`expr \\( $rest + 255 \\) / 256`\n"
" n=`dd bs=256 count=$cnt | tee -a \"$file\" | wc -c`\n"
" rest=`expr $rest - $n`\n"
"done\n"
"}; echo '### 200'\n",
(unsigned long) s.st_size, quoted_name.s,
quoted_name.s, (unsigned long) s.st_size,
(unsigned long) s.st_size);
else
n = fish_command (me, super, WAIT_REPLY,
"#STOR %lu /%s\n"
"echo '### 001'\n"
"{\n"
"file=/%s\n"
"rest=%lu\n"
"while [ $rest -gt 0 ]\n"
"do\n"
" cnt=`expr \\( $rest + 255 \\) / 256`\n"
" n=`dd bs=256 count=$cnt | tee -a $file | wc -c`\n"
" rest=`expr $rest - $n`\n"
"done\n"
"}; echo '### 200'\n",
(unsigned long) s.st_size, quoted_name.s,
quoted_name.s, (unsigned long) s.st_size);
if (n != PRELIM) {
close (h);
ERRNOR(E_REMOTE, -1);
}
total = 0;
while (1) {
int t;
while ((n = read(h, buffer, sizeof(buffer))) < 0) {
if ((errno == EINTR) && got_interrupt())
continue;
print_vfs_message(_("fish: Local read failed, sending zeros") );
close(h);
h = open( "/dev/zero", O_RDONLY );
}
if (n == 0)
break;
if ((t = write (SUP.sockw, buffer, n)) != n) {
if (t == -1) {
me->verrno = errno;
} else {
me->verrno = EIO;
}
goto error_return;
}
disable_interrupt_key();
total += n;
print_vfs_message(_("fish: storing %s %d (%lu)"),
was_error ? _("zeros") : _("file"), total,
(unsigned long) s.st_size);
}
close(h);
mhl_mem_free(quoted_name.s);
if ((fish_get_reply (me, SUP.sockr, NULL, 0) != COMPLETE) || was_error)
ERRNOR (E_REMOTE, -1);
return 0;
error_return:
close(h);
fish_get_reply(me, SUP.sockr, NULL, 0);
mhl_mem_free(quoted_name.s);
return -1;
}
static int
fish_linear_start (struct vfs_class *me, struct vfs_s_fh *fh, off_t offset)
{
char *name;
SHELL_ESCAPED_STR quoted_name;
if (offset)
ERRNOR (E_NOTSUPP, 0);
name = vfs_s_fullpath (me, fh->ino);
if (!name)
return 0;
quoted_name = mhl_shell_escape_dup(name);
fh->u.fish.append = 0;
/*
* Check whether the remote file is readable by using `dd' to copy
* a single byte from the remote file to /dev/null. If `dd' completes
* with exit status of 0 use `cat' to send the file contents to the
* standard output (i.e. over the network).
*/
offset = fish_command (me, FH_SUPER, WANT_STRING,
"#RETR /%s\n"
"if dd if=/%s of=/dev/null bs=1 count=1 2>/dev/null ;\n"
"then\n"
"ls -ln /%s 2>/dev/null | (\n"
"read p l u g s r\n"
"echo $s\n"
")\n"
"echo '### 100'\n"
"cat /%s\n"
"echo '### 200'\n"
"else\n"
"echo '### 500'\n"
"fi\n",
quoted_name.s, quoted_name.s, quoted_name.s, quoted_name.s );
mhl_mem_free (quoted_name.s);
if (offset != PRELIM) ERRNOR (E_REMOTE, 0);
fh->linear = LS_LINEAR_OPEN;
fh->u.fish.got = 0;
errno = 0;
#if SIZEOF_OFF_T == SIZEOF_LONG
fh->u.fish.total = strtol (reply_str, NULL, 10);
#else
fh->u.fish.total = strtoll (reply_str, NULL, 10);
#endif
if (errno != 0)
ERRNOR (E_REMOTE, 0);
return 1;
}
static void
fish_linear_abort (struct vfs_class *me, struct vfs_s_fh *fh)
{
struct vfs_s_super *super = FH_SUPER;
char buffer[8192];
int n;
print_vfs_message( _("Aborting transfer...") );
do {
n = MIN(8192, fh->u.fish.total - fh->u.fish.got);
if (n) {
if ((n = read(SUP.sockr, buffer, n)) < 0)
return;
fh->u.fish.got += n;
}
} while (n);
if (fish_get_reply (me, SUP.sockr, NULL, 0) != COMPLETE)
print_vfs_message( _("Error reported after abort.") );
else
print_vfs_message( _("Aborted transfer would be successful.") );
}
static int
fish_linear_read (struct vfs_class *me, struct vfs_s_fh *fh, void *buf, int len)
{
struct vfs_s_super *super = FH_SUPER;
int n = 0;
len = MIN( fh->u.fish.total - fh->u.fish.got, len );
disable_interrupt_key();
while (len && ((n = read (SUP.sockr, buf, len))<0)) {
if ((errno == EINTR) && !got_interrupt())
continue;
break;
}
enable_interrupt_key();
if (n>0) fh->u.fish.got += n;
if (n<0) fish_linear_abort(me, fh);
if ((!n) && ((fish_get_reply (me, SUP.sockr, NULL, 0) != COMPLETE)))
ERRNOR (E_REMOTE, -1);
ERRNOR (errno, n);
}
static void
fish_linear_close (struct vfs_class *me, struct vfs_s_fh *fh)
{
if (fh->u.fish.total != fh->u.fish.got)
fish_linear_abort(me, fh);
}
static int
fish_ctl (void *fh, int ctlop, void *arg)
{
(void) arg;
return 0;
#if 0
switch (ctlop) {
case VFS_CTL_IS_NOTREADY:
{
int v;
if (!FH->linear)
vfs_die ("You may not do this");
if (FH->linear == LS_LINEAR_CLOSED || FH->linear == LS_LINEAR_PREOPEN)
return 0;
v = vfs_s_select_on_two (FH_SUPER->u.fish.sockr, 0);
if (((v < 0) && (errno == EINTR)) || v == 0)
return 1;
return 0;
}
default:
return 0;
}
#endif
}
static int
fish_send_command(struct vfs_class *me, struct vfs_s_super *super, const char *cmd, int flags)
{
int r;
r = fish_command (me, super, WAIT_REPLY, "%s", cmd);
vfs_stamp_create (&vfs_fish_ops, super);
if (r != COMPLETE) ERRNOR (E_REMOTE, -1);
if (flags & OPT_FLUSH)
vfs_s_invalidate(me, super);
return 0;
}
#define PREFIX \
char buf[BUF_LARGE]; \
const char *crpath; \
char *mpath = mhl_str_dup (path); \
SHELL_ESCAPED_STR rpath; \
struct vfs_s_super *super; \
if (!(crpath = vfs_s_get_path_mangle (me, mpath, &super, 0))) { \
mhl_mem_free (mpath); \
return -1; \
} \
rpath = mhl_shell_escape_dup(crpath); \
mhl_mem_free (mpath);
#define POSTFIX(flags) \
mhl_mem_free (rpath.s); \
return fish_send_command(me, super, buf, flags);
static int
fish_chmod (struct vfs_class *me, const char *path, int mode)
{
PREFIX
g_snprintf(buf, sizeof(buf), "#CHMOD %4.4o /%s\n"
"chmod %4.4o /%s 2>/dev/null\n"
"echo '### 000'\n",
mode & 07777, rpath.s,
mode & 07777, rpath.s);
POSTFIX(OPT_FLUSH);
}
#define FISH_OP(name, string) \
static int fish_##name (struct vfs_class *me, const char *path1, const char *path2) \
{ \
char buf[BUF_LARGE]; \
const char *crpath1, *crpath2; \
char *mpath1, *mpath2; \
struct vfs_s_super *super1, *super2; \
if (!(crpath1 = vfs_s_get_path_mangle (me, mpath1 = g_strdup(path1), &super1, 0))) { \
mhl_mem_free (mpath1); \
return -1; \
} \
if (!(crpath2 = vfs_s_get_path_mangle (me, mpath2 = g_strdup(path2), &super2, 0))) { \
mhl_mem_free (mpath1); \
mhl_mem_free (mpath2); \
return -1; \
} \
SHELL_ESCAPED_STR rpath1 = mhl_shell_escape_dup (crpath1); \
mhl_mem_free (mpath1); \
SHELL_ESCAPED_STR rpath2 = mhl_shell_escape_dup (crpath2); \
mhl_mem_free (mpath2); \
g_snprintf(buf, sizeof(buf), string "\n", rpath1.s, rpath2.s, rpath1.s, rpath2.s); \
mhl_mem_free (rpath1.s); \
mhl_mem_free (rpath2.s); \
return fish_send_command(me, super2, buf, OPT_FLUSH); \
}
FISH_OP(rename, "#RENAME /%s /%s\n"
"mv /%s /%s 2>/dev/null\n"
"echo '### 000'" )
FISH_OP(link, "#LINK /%s /%s\n"
"ln /%s /%s 2>/dev/null\n"
"echo '### 000'" )
static int fish_symlink (struct vfs_class *me, const char *setto, const char *path)
{
SHELL_ESCAPED_STR qsetto;
PREFIX
qsetto = mhl_shell_escape_dup (setto);
g_snprintf(buf, sizeof(buf),
"#SYMLINK %s /%s\n"
"ln -s %s /%s 2>/dev/null\n"
"echo '### 000'\n",
qsetto.s, rpath.s, qsetto.s, rpath.s);
mhl_mem_free (qsetto.s);
POSTFIX(OPT_FLUSH);
}
static int
fish_chown (struct vfs_class *me, const char *path, int owner, int group)
{
char *sowner, *sgroup;
struct passwd *pw;
struct group *gr;
if ((pw = getpwuid (owner)) == NULL)
return 0;
if ((gr = getgrgid (group)) == NULL)
return 0;
sowner = pw->pw_name;
sgroup = gr->gr_name;
{
PREFIX
g_snprintf (buf, sizeof(buf),
"#CHOWN %s /%s\n"
"chown %s /%s 2>/dev/null\n"
"echo '### 000'\n",
sowner, rpath.s,
sowner, rpath.s);
fish_send_command (me, super, buf, OPT_FLUSH);
/* FIXME: what should we report if chgrp succeeds but chown fails? */
g_snprintf (buf, sizeof(buf),
"#CHGRP /%s \"/%s\"\n"
"chgrp %s \"/%s\" 2>/dev/null\n"
"echo '### 000'\n",
sgroup, rpath.s,
sgroup, rpath.s);
/* fish_send_command(me, super, buf, OPT_FLUSH); */
POSTFIX (OPT_FLUSH)
}
}
static int fish_unlink (struct vfs_class *me, const char *path)
{
PREFIX
g_snprintf(buf, sizeof(buf),
"#DELE /%s\n"
"rm -f /%s 2>/dev/null\n"
"echo '### 000'\n",
rpath.s, rpath.s);
POSTFIX(OPT_FLUSH);
}
static int fish_mkdir (struct vfs_class *me, const char *path, mode_t mode)
{
PREFIX
(void) mode;
g_snprintf(buf, sizeof(buf),
"#MKD /%s\n"
"mkdir /%s 2>/dev/null\n"
"echo '### 000'\n",
rpath.s, rpath.s);
POSTFIX(OPT_FLUSH);
}
static int fish_rmdir (struct vfs_class *me, const char *path)
{
PREFIX
g_snprintf(buf, sizeof(buf),
"#RMD /%s\n"
"rmdir /%s 2>/dev/null\n"
"echo '### 000'\n",
rpath.s, rpath.s);
POSTFIX(OPT_FLUSH);
}
static int
fish_fh_open (struct vfs_class *me, struct vfs_s_fh *fh, int flags,
int mode)
{
(void) mode;
fh->u.fish.append = 0;
/* File will be written only, so no need to retrieve it */
if (((flags & O_WRONLY) == O_WRONLY) && !(flags & (O_RDONLY | O_RDWR))) {
fh->u.fish.append = flags & O_APPEND;
if (!fh->ino->localname) {
int tmp_handle =
vfs_mkstemps (&fh->ino->localname, me->name,
fh->ino->ent->name);
if (tmp_handle == -1)
return -1;
close (tmp_handle);
}
return 0;
}
if (!fh->ino->localname)
if (vfs_s_retrieve_file (me, fh->ino) == -1)
return -1;
if (!fh->ino->localname)
vfs_die ("retrieve_file failed to fill in localname");
return 0;
}
static void
fish_fill_names (struct vfs_class *me, fill_names_f func)
{
struct vfs_s_super *super = MEDATA->supers;
const char *flags;
char *name;
while (super){
switch (SUP.flags & (FISH_FLAG_RSH | FISH_FLAG_COMPRESSED)) {
case FISH_FLAG_RSH:
flags = ":r";
break;
case FISH_FLAG_COMPRESSED:
flags = ":C";
break;
case FISH_FLAG_RSH | FISH_FLAG_COMPRESSED:
flags = "";
break;
default:
flags = "";
break;
}
name = g_strconcat ("/#sh:", SUP.user, "@", SUP.host, flags,
"/", SUP.cwdir, (char *) NULL);
(*func)(name);
mhl_mem_free (name);
super = super->next;
}
}
void
init_fish (void)
{
static struct vfs_s_subclass fish_subclass;
fish_subclass.flags = VFS_S_REMOTE;
fish_subclass.archive_same = fish_archive_same;
fish_subclass.open_archive = fish_open_archive;
fish_subclass.free_archive = fish_free_archive;
fish_subclass.fh_open = fish_fh_open;
fish_subclass.dir_load = fish_dir_load;
fish_subclass.file_store = fish_file_store;
fish_subclass.linear_start = fish_linear_start;
fish_subclass.linear_read = fish_linear_read;
fish_subclass.linear_close = fish_linear_close;
vfs_s_init_class (&vfs_fish_ops, &fish_subclass);
vfs_fish_ops.name = "fish";
vfs_fish_ops.prefix = "sh:";
vfs_fish_ops.fill_names = fish_fill_names;
vfs_fish_ops.chmod = fish_chmod;
vfs_fish_ops.chown = fish_chown;
vfs_fish_ops.symlink = fish_symlink;
vfs_fish_ops.link = fish_link;
vfs_fish_ops.unlink = fish_unlink;
vfs_fish_ops.rename = fish_rename;
vfs_fish_ops.mkdir = fish_mkdir;
vfs_fish_ops.rmdir = fish_rmdir;
vfs_fish_ops.ctl = fish_ctl;
vfs_register_class (&vfs_fish_ops);
}
Reference in New Issue View Git Blame Copy Permalink