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sftpclient.c
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sftpclient.c
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/*
* This file is part of the Green End SFTP Server.
* Copyright (C) 2007, 2010, 2011, 2014, 2016 Richard Kettlewell
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
#define CLIENT 1
#include "sftpclient.h"
#include "utils.h"
#include "xfns.h"
#include "send.h"
#include "globals.h"
#include "types.h"
#include "alloc.h"
#include "parse.h"
#include "sftp.h"
#include "debug.h"
#include "thread.h"
#include "stat.h"
#include "charset.h"
#include <getopt.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include <unistd.h>
#include <stdio.h>
#include <arpa/inet.h>
#include <stdarg.h>
#include <sys/wait.h>
#include <time.h>
#include <fcntl.h>
#include <libgen.h>
#include <assert.h>
#include <sys/ioctl.h>
#include <locale.h>
#include <sys/time.h>
#include <langinfo.h>
#include <sys/socket.h>
#include <netdb.h>
#include <signal.h>
#include <limits.h>
#include <termios.h>
#if HAVE_READLINE
# include <readline/readline.h>
# include <readline/history.h>
#endif
// Command options
#define CMD_RAW 0x0001
// Command table
struct command {
// Command name
const char *name;
// Supported options
unsigned options;
// Minimum/maximum number of arguments
int minargs, maxargs;
// Handler function
int (*handler)(int ac, char **av, unsigned options);
// Argument descriptions
const char *args;
// Command description
const char *help;
};
struct client_handle {
size_t len;
char *data;
};
static int sftpin;
static struct allocator allocator;
static struct sftpjob fakejob;
static struct worker fakeworker;
static char *cwd;
static const char *inputpath;
static int inputline;
static int progress_indicators = 1;
static int terminal_width;
static int textmode;
static char *newline;
static char *vendorname, *servername, *serverversion, *serverversions;
static uint64_t serverbuild;
static int stoponerror;
static int echo;
static uint32_t attrmask;
static const char *rename_extension;
static const char *hardlink_extension;
static const char *statvfs_extension;
const struct sftpprotocol *protocol = &sftp_v3;
const char sendtype[] = "request";
/* Command line */
static size_t buffersize = 32768;
static int nrequests = 16;
static const char *subsystem;
static const char *program;
static const char *program_debugpath;
static const char *program_config;
static const char *batchfile;
static int sshversion;
static int compress;
static const char *sshconf;
static const char *sshoptions[1024];
static int nsshoptions;
static int sshverbose;
static int sftpversion = 6;
static int quirk_reverse_symlink;
static int forceversion;
static char *sftp_realpath(const char *path);
enum {
OPT_QUIRK_REVERSE_SYMLINK = 256,
OPT_STOP_ON_ERROR,
OPT_NO_STOP_ON_ERROR,
OPT_PROGRESS,
OPT_NO_PROGRESS,
OPT_ECHO,
OPT_FIX_SIGPIPE,
OPT_FORCE_VERSION,
OPT_PROGRAM_DEBUG_PATH,
OPT_PROGRAM_CONFIG,
};
static const struct option options[] = {
{"help", no_argument, 0, 'h'},
{"version", no_argument, 0, 'V'},
{"dropbear", no_argument, 0, 'r'},
{"buffer", required_argument, 0, 'B'},
{"batch", required_argument, 0, 'b'},
{"program", required_argument, 0, 'P'},
{"program-config", required_argument, 0, OPT_PROGRAM_CONFIG},
{"requests", required_argument, 0, 'R'},
{"subsystem", required_argument, 0, 's'},
{"sftp-version", required_argument, 0, 'S'},
{"quirk-reverse-symlink", no_argument, 0, OPT_QUIRK_REVERSE_SYMLINK},
{"stop-on-error", no_argument, 0, OPT_STOP_ON_ERROR},
{"no-stop-on-error", no_argument, 0, OPT_NO_STOP_ON_ERROR},
{"progress", no_argument, 0, OPT_PROGRESS},
{"no-progress", no_argument, 0, OPT_NO_PROGRESS},
{"echo", no_argument, 0, OPT_ECHO},
{"fix-sigpipe", no_argument, 0, OPT_FIX_SIGPIPE},
{"force-version", required_argument, 0, OPT_FORCE_VERSION},
{"debug", no_argument, 0, 'd'},
{"debug-path", required_argument, 0, 'D'},
{"program-debug-path", required_argument, 0, OPT_PROGRAM_DEBUG_PATH},
{"host", required_argument, 0, 'H'},
{"port", required_argument, 0, 'p'},
{"ipv4", no_argument, 0, '4'},
{"ipv6", no_argument, 0, '6'},
{"1", no_argument, 0, '1'},
{"2", no_argument, 0, '2'},
{"C", no_argument, 0, 'C'},
{"F", required_argument, 0, 'F'},
{"o", required_argument, 0, 'o'},
{"v", no_argument, 0, 'v'},
{0, 0, 0, 0}};
/* display usage message and terminate */
static void attribute((noreturn)) help(void) {
sftp_xprintf("Usage:\n"
" sftpclient [OPTIONS] [USER@]HOST\n"
"\n"
"Quick and dirty SFTP client, not intended for production use.\n"
"\n");
sftp_xprintf(
"Options:\n"
" --help, -h Display usage message\n"
" --version, -V Display version number\n"
" -r, --dropbear Use dbclient instead of ssh\n"
" -B, --buffer BYTES Select buffer size (default 8192)\n"
" -b, --batch PATH Read batch file\n"
" -P, --program PATH Execute program as SFTP server\n"
" -R, --requests COUNT Maximum outstanding requests (default 8)\n"
" -s, --subsystem NAME Remote subsystem name\n"
" -S, --sftp-version VER Protocol version to request (default 3)\n"
" --echo Echo commands\n"
" --quirk-openssh Server gets SSH_FXP_SYMLINK backwards\n"
"Options passed to SSH:\n"
" -1, -2 Select protocol version\n"
" -C Enable compression\n"
" -F PATH Use alternative config file\n"
" -o OPTION Pass option to client\n"
" -v Raise logging level\n");
exit(0);
}
/* display version number and terminate */
static void attribute((noreturn)) version(void) {
sftp_xprintf("sftp client version %s\n", VERSION);
exit(0);
}
/* Utilities */
static int attribute((format(printf, 1, 2))) error(const char *fmt, ...) {
va_list ap;
if(inputpath)
fprintf(stderr, "%s:%d ", inputpath, inputline);
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
fputc('\n', stderr);
fflush(stderr);
return -1;
}
static int status(void) {
uint32_t status;
char *msg;
/* Cope with half-parsed responses */
fakejob.ptr = fakejob.data + 5;
fakejob.left = fakejob.len - 5;
cpcheck(sftp_parse_uint32(&fakejob, &status));
cpcheck(sftp_parse_string(&fakejob, &msg, 0));
if(status) {
error("%s (%s)", msg, status_to_string(status));
return -1;
} else
return 0;
}
/* Get a response. Picks out the type and ID. */
static uint8_t getresponse(int expected, uint32_t expected_id,
const char *what) {
uint32_t len;
uint8_t type;
if(sftp_xread(sftpin, &len, sizeof len))
sftp_fatal("unexpected EOF from server while reading %s response length",
what);
free(fakejob.data); /* free last job */
fakejob.len = ntohl(len);
fakejob.data = sftp_xmalloc(fakejob.len);
if(sftp_xread(sftpin, fakejob.data, fakejob.len))
sftp_fatal("unexpected EOF from server while reading %s response data",
what);
if(sftp_debugging) {
D(("%s response:", what));
sftp_debug_hexdump(fakejob.data, fakejob.len);
}
fakejob.left = fakejob.len;
fakejob.ptr = fakejob.data;
cpcheck(sftp_parse_uint8(&fakejob, &type));
if(type != SSH_FXP_VERSION) {
cpcheck(sftp_parse_uint32(&fakejob, &fakejob.id));
if(expected_id && fakejob.id != expected_id)
sftp_fatal("wrong ID in response to %s (want %" PRIu32 " got %" PRIu32
" type was %d)",
what, expected_id, fakejob.id, type);
}
if(expected > 0 && type != expected) {
if(type == SSH_FXP_STATUS)
status();
else
sftp_fatal("expected %s response %d got %d", what, expected, type);
}
return type;
}
/* Split a command line */
static int split(char *line, char **av) {
char *arg;
int ac = 0;
while(*line) {
if(isspace((unsigned char)*line)) {
++line;
continue;
}
if(*line == '"') {
arg = av[ac++] = line++;
while(*line && *line != '"') {
if(*line == '\\' && line[1])
++line;
*arg++ = *line++;
}
if(!*line) {
error("unterminated string");
return -1;
}
*arg++ = 0;
line++;
} else {
av[ac++] = line;
while(*line && !isspace((unsigned char)*line))
++line;
if(*line)
*line++ = 0;
}
}
av[ac] = 0;
return ac;
}
static uint32_t newid(void) {
static uint32_t latestid;
do {
++latestid;
} while(!latestid);
return latestid;
}
/* Find path to current directory */
static char *remote_cwd(void) {
if(!cwd) {
if(!(cwd = sftp_realpath(".")))
exit(1);
cwd = sftp_xstrdup(cwd);
}
return cwd;
}
static void progress(const char *path, uint64_t sofar, uint64_t total) {
if(progress_indicators) {
if(!total)
sftp_xprintf("\r%*s\r", terminal_width, "");
else if(total == (uint64_t)-1)
sftp_xprintf("\r%.60s: %12" PRIu64 "b", path, sofar);
else
sftp_xprintf("\r%.60s: %12" PRIu64 "b %3d%%", path, sofar,
(int)(100 * sofar / total));
if(fflush(stdout) < 0)
sftp_fatal("error writing to stdout: %s", strerror(errno));
}
}
/* SFTP operation stubs */
static int sftp_init(void) {
uint32_t version, u32;
uint16_t u16;
/* Send SSH_FXP_INIT */
sftp_send_begin(&fakeworker);
sftp_send_uint8(&fakeworker, SSH_FXP_INIT);
sftp_send_uint32(&fakeworker, sftpversion);
sftp_send_end(&fakeworker);
/* Parse the version reponse */
if(getresponse(SSH_FXP_VERSION, 0, "SSH_FXP_INIT") != SSH_FXP_VERSION)
return -1;
cpcheck(sftp_parse_uint32(&fakejob, &version));
switch(version) {
case 3:
protocol = &sftp_v3;
break;
case 4:
protocol = &sftp_v4;
break;
case 5:
protocol = &sftp_v5;
break;
case 6:
protocol = &sftp_v6;
break;
default:
return error("server wanted protocol version %" PRIu32, version);
}
attrmask = protocol->attrmask;
/* Extension data */
while(fakejob.left) {
char *xname, *xdata;
size_t xdatalen;
cpcheck(sftp_parse_string(&fakejob, &xname, 0));
cpcheck(sftp_parse_string(&fakejob, &xdata, &xdatalen));
D(("server sent extension '%s'", xname));
/* TODO table-driven extension parsing */
if(!strcmp(xname, "newline")) {
free(newline);
newline = sftp_xstrdup(xdata);
if(!*newline)
return error("cannot cope with empty newline sequence");
/* TODO check newline sequence doesn't contain repeats */
} else if(!strcmp(xname, "vendor-id")) {
struct sftpjob xjob;
char *vn, *sn, *sv;
xjob.a = &allocator;
xjob.ptr = (void *)xdata;
xjob.left = xdatalen;
cpcheck(sftp_parse_string(&xjob, &vn, 0));
cpcheck(sftp_parse_string(&xjob, &sn, 0));
cpcheck(sftp_parse_string(&xjob, &sv, 0));
cpcheck(sftp_parse_uint64(&xjob, &serverbuild));
free(vendorname);
vendorname = sftp_xstrdup(vn);
free(servername);
servername = sftp_xstrdup(sn);
free(serverversion);
serverversion = sftp_xstrdup(sv);
} else if(!strcmp(xname, "versions")) {
free(serverversions);
serverversions = sftp_xstrdup(xdata);
} else if(!strcmp(xname, "[email protected]")) {
/* See commentary in v3.c */
if(!strcmp(xdata, "targetpath-linkpath"))
quirk_reverse_symlink = 1;
else if(!strcmp(xdata, "linkpath-targetpath"))
quirk_reverse_symlink = 0;
else
error("unknown %s value '%s'", xname, xdata);
} else if(!strcmp(xname, "supported")) {
struct sftpjob xjob;
xjob.a = &allocator;
xjob.ptr = (void *)xdata;
xjob.left = xdatalen;
cpcheck(sftp_parse_uint32(&xjob, &attrmask));
cpcheck(sftp_parse_uint32(&xjob, &u32)); /* supported-attribute-bits */
cpcheck(sftp_parse_uint32(&xjob, &u32)); /* supported-open-flags */
cpcheck(sftp_parse_uint32(&xjob, &u32)); /* supported-access-mask */
cpcheck(sftp_parse_uint32(&xjob, &u32)); /* max-read-size */
while(xjob.left)
cpcheck(sftp_parse_string(&xjob, 0, 0)); /* extension-names */
} else if(!strcmp(xname, "supported2")) {
struct sftpjob xjob;
xjob.a = &allocator;
xjob.ptr = (void *)xdata;
xjob.left = xdatalen;
cpcheck(
sftp_parse_uint32(&xjob, &attrmask)); /* supported-attribute-mask */
assert(!(attrmask & SSH_FILEXFER_ATTR_CTIME));
cpcheck(sftp_parse_uint32(&xjob, &u32)); /* supported-attribute-bits */
cpcheck(sftp_parse_uint32(&xjob, &u32)); /* supported-open-flags */
cpcheck(sftp_parse_uint32(&xjob, &u32)); /* supported-access-mask */
cpcheck(sftp_parse_uint32(&xjob, &u32)); /* max-read-size */
cpcheck(sftp_parse_uint16(&xjob, &u16)); /* supported-open-block-vector */
cpcheck(sftp_parse_uint16(&xjob, &u16)); /* supported-block-vector */
cpcheck(sftp_parse_uint32(&xjob, &u32)); /* attrib-extension-count */
while(u32 > 0) {
cpcheck(sftp_parse_string(&xjob, 0, 0)); /* attrib-extension-names */
--u32;
}
cpcheck(sftp_parse_uint32(&xjob, &u32)); /* extension-count */
while(u32 > 0) {
cpcheck(sftp_parse_string(&xjob, 0, 0)); /* extension-names */
--u32;
}
} else if(!strcmp(xname, "[email protected]") &&
!strcmp(xdata, "1")) {
rename_extension = "[email protected]";
} else if(!strcmp(xname, "[email protected]") && !rename_extension) {
rename_extension = "[email protected]";
} else if(!strcmp(xname, "[email protected]") && !strcmp(xdata, "1")) {
hardlink_extension = "[email protected]";
} else if(!strcmp(xname, "[email protected]") && !strcmp(xdata, "2")) {
statvfs_extension = "[email protected]";
}
}
/* Make sure outbound translation will actually work */
if(buffersize < strlen(newline))
buffersize = strlen(newline);
return 0;
}
static char *sftp_fullpath(struct sftpjob *job, const char *path,
unsigned options) {
char *fullpath;
if(path[0] == '/' || (options & CMD_RAW)) {
fullpath = sftp_alloc(job->a, strlen(path) + 1);
strcpy(fullpath, path);
} else {
remote_cwd();
fullpath = sftp_alloc(job->a, strlen(cwd) + strlen(path) + 2);
strcpy(fullpath, cwd);
strcat(fullpath, "/");
strcat(fullpath, path);
}
return fullpath;
}
static char *sftp_realpath(const char *path) {
char *resolved;
uint32_t u32, id;
sftp_send_begin(&fakeworker);
sftp_send_uint8(&fakeworker, SSH_FXP_REALPATH);
sftp_send_uint32(&fakeworker, id = newid());
sftp_send_path(&fakejob, &fakeworker, path);
sftp_send_end(&fakeworker);
if(getresponse(SSH_FXP_NAME, id, "SSH_FXP_REALPATH") != SSH_FXP_NAME)
return 0;
cpcheck(sftp_parse_uint32(&fakejob, &u32));
if(u32 != 1)
sftp_fatal("wrong count in SSH_FXP_REALPATH reply");
cpcheck(sftp_parse_path(&fakejob, &resolved));
return resolved;
}
static char *sftp_realpath_v6(const char *path, int control_byte,
char **compose, struct sftpattr *attrs) {
char *resolved;
uint32_t u32, id;
sftp_send_begin(&fakeworker);
sftp_send_uint8(&fakeworker, SSH_FXP_REALPATH);
sftp_send_uint32(&fakeworker, id = newid());
sftp_send_path(&fakejob, &fakeworker, path);
if(control_byte >= 0) {
sftp_send_uint8(&fakeworker, control_byte);
if(compose)
while(*compose)
sftp_send_path(&fakejob, &fakeworker, *compose++);
}
sftp_send_end(&fakeworker);
if(getresponse(SSH_FXP_NAME, id, "SSH_FXP_REALPATH") != SSH_FXP_NAME)
return 0;
cpcheck(sftp_parse_uint32(&fakejob, &u32));
if(u32 != 1)
sftp_fatal("wrong count in SSH_FXP_REALPATH reply");
cpcheck(sftp_parse_path(&fakejob, &resolved));
cpcheck(protocol->parseattrs(&fakejob, attrs));
return resolved;
}
static int sftp_stat(const char *path, struct sftpattr *attrs, uint8_t type) {
uint32_t id;
sftp_send_begin(&fakeworker);
sftp_send_uint8(&fakeworker, type);
sftp_send_uint32(&fakeworker, id = newid());
sftp_send_path(&fakejob, &fakeworker, path);
if(protocol->version > 3)
sftp_send_uint32(&fakeworker, 0xFFFFFFFF);
sftp_send_end(&fakeworker);
if(getresponse(SSH_FXP_ATTRS, id, "SSH_FXP_*STAT") != SSH_FXP_ATTRS)
return -1;
cpcheck(protocol->parseattrs(&fakejob, attrs));
attrs->name = path;
return 0;
}
static int sftp_fstat(const struct client_handle *hp, struct sftpattr *attrs) {
uint32_t id;
sftp_send_begin(&fakeworker);
sftp_send_uint8(&fakeworker, SSH_FXP_FSTAT);
sftp_send_uint32(&fakeworker, id = newid());
sftp_send_bytes(&fakeworker, hp->data, hp->len);
if(protocol->version > 3)
sftp_send_uint32(&fakeworker, 0xFFFFFFFF);
sftp_send_end(&fakeworker);
if(getresponse(SSH_FXP_ATTRS, id, "SSH_FXP_FSTAT") != SSH_FXP_ATTRS)
return -1;
cpcheck(protocol->parseattrs(&fakejob, attrs));
return 0;
}
static int sftp_opendir(const char *path, struct client_handle *hp) {
uint32_t id;
sftp_send_begin(&fakeworker);
sftp_send_uint8(&fakeworker, SSH_FXP_OPENDIR);
sftp_send_uint32(&fakeworker, id = newid());
sftp_send_path(&fakejob, &fakeworker, path);
sftp_send_end(&fakeworker);
if(getresponse(SSH_FXP_HANDLE, id, "SSH_FXP_OPENDIR") != SSH_FXP_HANDLE)
return -1;
cpcheck(sftp_parse_string(&fakejob, &hp->data, &hp->len));
return 0;
}
static int sftp_readdir(const struct client_handle *hp,
struct sftpattr **attrsp, size_t *nattrsp) {
uint32_t id, n;
struct sftpattr *attrs;
char *name, *longname = 0;
sftp_send_begin(&fakeworker);
sftp_send_uint8(&fakeworker, SSH_FXP_READDIR);
sftp_send_uint32(&fakeworker, id = newid());
sftp_send_bytes(&fakeworker, hp->data, hp->len);
sftp_send_end(&fakeworker);
switch(getresponse(-1, id, "SSH_FXP_READDIR")) {
case SSH_FXP_NAME:
cpcheck(sftp_parse_uint32(&fakejob, &n));
if(n > SIZE_MAX / sizeof(struct sftpattr))
sftp_fatal("too many attributes in SSH_FXP_READDIR response");
attrs = sftp_alloc(fakejob.a, n * sizeof(struct sftpattr));
if(nattrsp)
*nattrsp = n;
if(attrsp)
*attrsp = attrs;
while(n > 0) {
cpcheck(sftp_parse_path(&fakejob, &name));
// all variants require relative paths in responses to SSH_FXP_READDIR
if(name[0] == '/')
sftp_fatal("absolute path in SSH_FXP_READDIR response (%s)", name);
if(protocol->version <= 3)
cpcheck(sftp_parse_path(&fakejob, &longname));
cpcheck(protocol->parseattrs(&fakejob, attrs));
attrs->name = name;
attrs->longname = longname;
++attrs;
--n;
}
return 0;
case SSH_FXP_STATUS:
cpcheck(sftp_parse_uint32(&fakejob, &n));
if(n == SSH_FX_EOF) {
if(nattrsp)
*nattrsp = 0;
if(attrsp)
*attrsp = 0;
return 0;
}
status();
return -1;
default:
sftp_fatal("bogus response to SSH_FXP_READDIR");
}
}
static int sftp_close(const struct client_handle *hp) {
uint32_t id;
sftp_send_begin(&fakeworker);
sftp_send_uint8(&fakeworker, SSH_FXP_CLOSE);
sftp_send_uint32(&fakeworker, id = newid());
sftp_send_bytes(&fakeworker, hp->data, hp->len);
sftp_send_end(&fakeworker);
getresponse(SSH_FXP_STATUS, id, "SSH_FXP_CLOSE");
return status();
}
static int sftp_setstat(const char *path, const struct sftpattr *attrs) {
uint32_t id;
sftp_send_begin(&fakeworker);
sftp_send_uint8(&fakeworker, SSH_FXP_SETSTAT);
sftp_send_uint32(&fakeworker, id = newid());
sftp_send_path(&fakejob, &fakeworker, path);
protocol->sendattrs(&fakejob, attrs);
sftp_send_end(&fakeworker);
getresponse(SSH_FXP_STATUS, id, "SSH_FXP_SETSTAT");
return status();
}
static int sftp_fsetstat(const struct client_handle *hp,
const struct sftpattr *attrs) {
uint32_t id;
sftp_send_begin(&fakeworker);
sftp_send_uint8(&fakeworker, SSH_FXP_FSETSTAT);
sftp_send_uint32(&fakeworker, id = newid());
sftp_send_bytes(&fakeworker, hp->data, hp->len);
protocol->sendattrs(&fakejob, attrs);
sftp_send_end(&fakeworker);
getresponse(SSH_FXP_STATUS, id, "SSH_FXP_FSETSTAT");
return status();
}
static int sftp_rmdir(const char *path) {
uint32_t id;
sftp_send_begin(&fakeworker);
sftp_send_uint8(&fakeworker, SSH_FXP_RMDIR);
sftp_send_uint32(&fakeworker, id = newid());
sftp_send_path(&fakejob, &fakeworker, path);
sftp_send_end(&fakeworker);
getresponse(SSH_FXP_STATUS, id, "SSH_FXP_RMDIR");
return status();
}
static int sftp_remove(const char *path) {
uint32_t id;
sftp_send_begin(&fakeworker);
sftp_send_uint8(&fakeworker, SSH_FXP_REMOVE);
sftp_send_uint32(&fakeworker, id = newid());
sftp_send_path(&fakejob, &fakeworker, path);
sftp_send_end(&fakeworker);
getresponse(SSH_FXP_STATUS, id, "SSH_FXP_REMOVE");
return status();
}
static int sftp_rename(const char *oldpath, const char *newpath,
unsigned flags) {
uint32_t id;
/* In v3/4 atomic is assumed, overwrite and native are not available */
if(protocol->version <= 4 && (flags & (uint32_t)~SSH_FXF_RENAME_ATOMIC) != 0)
return error("cannot emulate rename flags %#x in protocol %d", flags,
protocol->version);
sftp_send_begin(&fakeworker);
sftp_send_uint8(&fakeworker, SSH_FXP_RENAME);
sftp_send_uint32(&fakeworker, id = newid());
sftp_send_path(&fakejob, &fakeworker, oldpath);
sftp_send_path(&fakejob, &fakeworker, newpath);
if(protocol->version >= 5)
sftp_send_uint32(&fakeworker, flags);
sftp_send_end(&fakeworker);
getresponse(SSH_FXP_STATUS, id, "SSH_FXP_RENAME");
return status();
}
static int sftp_prename(const char *oldpath, const char *newpath) {
uint32_t id;
if(!rename_extension)
return error("no posix-rename extension found");
sftp_send_begin(&fakeworker);
sftp_send_uint8(&fakeworker, SSH_FXP_EXTENDED);
sftp_send_uint32(&fakeworker, id = newid());
sftp_send_string(&fakeworker, rename_extension);
sftp_send_path(&fakejob, &fakeworker, oldpath);
sftp_send_path(&fakejob, &fakeworker, newpath);
sftp_send_end(&fakeworker);
getresponse(SSH_FXP_STATUS, id, rename_extension);
return status();
}
static int sftp_hardlink(const char *targetpath, const char *linkpath) {
uint32_t id;
if(!hardlink_extension)
return error("no hardlink extension found");
sftp_send_begin(&fakeworker);
sftp_send_uint8(&fakeworker, SSH_FXP_EXTENDED);
sftp_send_uint32(&fakeworker, id = newid());
sftp_send_string(&fakeworker, hardlink_extension);
sftp_send_path(&fakejob, &fakeworker, targetpath);
sftp_send_path(&fakejob, &fakeworker, linkpath);
sftp_send_end(&fakeworker);
getresponse(SSH_FXP_STATUS, id, hardlink_extension);
return status();
}
static int sftp_link(const char *targetpath, const char *linkpath,
int sftp_send_symlink) {
uint32_t id;
if(protocol->version < 6 && !sftp_send_symlink) {
if(hardlink_extension)
return sftp_hardlink(targetpath, linkpath);
return error("hard links not supported in protocol %" PRIu32,
protocol->version);
}
sftp_send_begin(&fakeworker);
sftp_send_uint8(&fakeworker,
(protocol->version >= 6 ? SSH_FXP_LINK : SSH_FXP_SYMLINK));
sftp_send_uint32(&fakeworker, id = newid());
if(quirk_reverse_symlink) {
/* OpenSSH server gets SSH_FXP_SYMLINK args back to front
* - see http://bugzilla.mindrot.org/show_bug.cgi?id=861 */
sftp_send_path(&fakejob, &fakeworker, targetpath);
sftp_send_path(&fakejob, &fakeworker, linkpath);
} else {
sftp_send_path(&fakejob, &fakeworker, linkpath);
sftp_send_path(&fakejob, &fakeworker, targetpath);
}
if(protocol->version >= 6)
sftp_send_uint8(&fakeworker, !!sftp_send_symlink);
sftp_send_end(&fakeworker);
getresponse(SSH_FXP_STATUS, id, "SSH_FXP_*LINK");
return status();
}
static int sftp_open(const char *path, uint32_t desired_access, uint32_t flags,
const struct sftpattr *attrs, struct client_handle *hp) {
uint32_t id, pflags = 0;
remote_cwd();
if(protocol->version <= 4) {
/* We must translate the v5/6 style parameters back down to v3/4 */
if(desired_access & ACE4_READ_DATA)
pflags |= SSH_FXF_READ;
if(desired_access & ACE4_WRITE_DATA)
pflags |= SSH_FXF_WRITE;
switch(flags & SSH_FXF_ACCESS_DISPOSITION) {
case SSH_FXF_CREATE_NEW:
pflags |= SSH_FXF_CREAT | SSH_FXF_EXCL;
break;
case SSH_FXF_CREATE_TRUNCATE:
pflags |= SSH_FXF_CREAT | SSH_FXF_TRUNC;
break;
case SSH_FXF_OPEN_OR_CREATE:
pflags |= SSH_FXF_CREAT;
break;
case SSH_FXF_OPEN_EXISTING:
break;
case SSH_FXF_TRUNCATE_EXISTING:
pflags |= SSH_FXF_TRUNC;
break;
default:
return error("unknown SSH_FXF_ACCESS_DISPOSITION %#" PRIx32, flags);
}
if(flags & (SSH_FXF_APPEND_DATA | SSH_FXF_APPEND_DATA_ATOMIC))
pflags |= SSH_FXF_APPEND;
if(flags & SSH_FXF_TEXT_MODE) {
if(protocol->version < 4)
return error("SSH_FXF_TEXT_MODE cannot be emulated in protocol %d",
protocol->version);
else
pflags |= SSH_FXF_TEXT;
}
if(flags & (uint32_t) ~(SSH_FXF_ACCESS_DISPOSITION | SSH_FXF_APPEND_DATA |
SSH_FXF_APPEND_DATA_ATOMIC | SSH_FXF_TEXT_MODE))
return error("future SSH_FXP_OPEN flags (%#" PRIx32
") cannot be emulated in protocol %d",
flags, protocol->version);
sftp_send_begin(&fakeworker);
sftp_send_uint8(&fakeworker, SSH_FXP_OPEN);
sftp_send_uint32(&fakeworker, id = newid());
sftp_send_path(&fakejob, &fakeworker, path);
sftp_send_uint32(&fakeworker, pflags);
protocol->sendattrs(&fakejob, attrs);
sftp_send_end(&fakeworker);
} else {
sftp_send_begin(&fakeworker);
sftp_send_uint8(&fakeworker, SSH_FXP_OPEN);
sftp_send_uint32(&fakeworker, id = newid());
sftp_send_path(&fakejob, &fakeworker, path);
sftp_send_uint32(&fakeworker, desired_access);
sftp_send_uint32(&fakeworker, flags);
protocol->sendattrs(&fakejob, attrs);
sftp_send_end(&fakeworker);
}
if(getresponse(SSH_FXP_HANDLE, id, "SSH_FXP_OPEN") != SSH_FXP_HANDLE)
return -1;
cpcheck(sftp_parse_string(&fakejob, &hp->data, &hp->len));
return 0;
}
struct space_available {
uint64_t bytes_on_device;
uint64_t unused_bytes_on_device;
uint64_t bytes_available_to_user;
uint64_t unused_bytes_available_to_user;
uint32_t bytes_per_allocation_unit;
};
static int sftp_space_available(const char *path, struct space_available *as) {
uint32_t id;
sftp_send_begin(&fakeworker);
sftp_send_uint8(&fakeworker, SSH_FXP_EXTENDED);
sftp_send_uint32(&fakeworker, id = newid());
sftp_send_string(&fakeworker, "space-available");
sftp_send_path(&fakejob, &fakeworker, path);
sftp_send_end(&fakeworker);
if(getresponse(SSH_FXP_EXTENDED_REPLY, id, "space-available") !=
SSH_FXP_EXTENDED_REPLY)
return -1;
cpcheck(sftp_parse_uint64(&fakejob, &as->bytes_on_device));
cpcheck(sftp_parse_uint64(&fakejob, &as->unused_bytes_on_device));
cpcheck(sftp_parse_uint64(&fakejob, &as->bytes_available_to_user));
cpcheck(sftp_parse_uint64(&fakejob, &as->unused_bytes_available_to_user));
cpcheck(sftp_parse_uint32(&fakejob, &as->bytes_per_allocation_unit));
return 0;
}
static int sftp_mkdir(const char *path, mode_t mode) {
struct sftpattr attrs;
uint32_t id;
if(mode == (mode_t)-1)
attrs.valid = 0;
else {
attrs.valid = SSH_FILEXFER_ATTR_PERMISSIONS;
attrs.permissions = mode;
}
attrs.type = SSH_FILEXFER_TYPE_DIRECTORY;
sftp_send_begin(&fakeworker);
sftp_send_uint8(&fakeworker, SSH_FXP_MKDIR);
sftp_send_uint32(&fakeworker, id = newid());
sftp_send_path(&fakejob, &fakeworker, path);
protocol->sendattrs(&fakejob, &attrs);
sftp_send_end(&fakeworker);
getresponse(SSH_FXP_STATUS, id, "SSH_FXP_MKDIR");
return status();
}
static char *sftp_readlink(const char *path) {
char *resolved;
uint32_t u32, id;
sftp_send_begin(&fakeworker);
sftp_send_uint8(&fakeworker, SSH_FXP_READLINK);
sftp_send_uint32(&fakeworker, id = newid());
sftp_send_path(&fakejob, &fakeworker, path);
sftp_send_end(&fakeworker);
if(getresponse(SSH_FXP_NAME, id, "SSH_FXP_READLINK") != SSH_FXP_NAME)
return 0;
cpcheck(sftp_parse_uint32(&fakejob, &u32));
if(u32 != 1)
sftp_fatal("wrong count in SSH_FXP_READLINK reply");
cpcheck(sftp_parse_path(&fakejob, &resolved));
return resolved;
}
static int sftp_text_seek(const struct client_handle *hp, uint64_t line) {
uint32_t id;
sftp_send_begin(&fakeworker);
sftp_send_uint8(&fakeworker, SSH_FXP_EXTENDED);
sftp_send_uint32(&fakeworker, id = newid());
sftp_send_string(&fakeworker, "text-seek");
sftp_send_bytes(&fakeworker, hp->data, hp->len);
sftp_send_uint64(&fakeworker, line);
sftp_send_end(&fakeworker);
getresponse(SSH_FXP_STATUS, id, "text-seek");
return status();
}
struct statvfs_reply {
uint64_t bsize;
uint64_t frsize;
uint64_t blocks;
uint64_t bfree;
uint64_t bavail;
uint64_t files;
uint64_t ffree;
uint64_t favail;
uint64_t fsid;
uint64_t flags;
uint64_t namemax;
};
static int sftp_statvfs(const char *path, struct statvfs_reply *sr) {
uint32_t id;
if(!statvfs_extension)
return error("no statvfs extension found");
sftp_send_begin(&fakeworker);
sftp_send_uint8(&fakeworker, SSH_FXP_EXTENDED);
sftp_send_uint32(&fakeworker, id = newid());
sftp_send_string(&fakeworker, statvfs_extension);
sftp_send_path(&fakejob, &fakeworker, path);
sftp_send_end(&fakeworker);
getresponse(SSH_FXP_EXTENDED_REPLY, id, statvfs_extension);
sftp_memset(sr, 0,
sizeof *sr); // workaround overenthusiastic warning with LTO
cpcheck(sftp_parse_uint64(&fakejob, &sr->bsize));
cpcheck(sftp_parse_uint64(&fakejob, &sr->frsize));
cpcheck(sftp_parse_uint64(&fakejob, &sr->blocks));
cpcheck(sftp_parse_uint64(&fakejob, &sr->bfree));
cpcheck(sftp_parse_uint64(&fakejob, &sr->bavail));
cpcheck(sftp_parse_uint64(&fakejob, &sr->files));
cpcheck(sftp_parse_uint64(&fakejob, &sr->ffree));
cpcheck(sftp_parse_uint64(&fakejob, &sr->favail));
cpcheck(sftp_parse_uint64(&fakejob, &sr->fsid));
cpcheck(sftp_parse_uint64(&fakejob, &sr->flags));
cpcheck(sftp_parse_uint64(&fakejob, &sr->namemax));
return 0;
}
/* Command line operations */
static int cmd_pwd(int attribute((unused)) ac, char attribute((unused)) * *av,
unsigned attribute((unused)) options) {
sftp_xprintf("%s\n", remote_cwd());
return 0;
}
static int cmd_cd(int attribute((unused)) ac, char **av,
unsigned attribute((unused)) options) {
const char *newcwd;
struct sftpattr attrs;
remote_cwd();
if(protocol->version >= 6) {
/* We can do this more efficiently */
newcwd = sftp_realpath_v6(cwd, SSH_FXP_REALPATH_STAT_ALWAYS, av, &attrs);
if(!newcwd)
return -1;
} else {
if(av[0][0] == '/')
newcwd = sftp_realpath(av[0]);
else {
char *full = sftp_alloc(fakejob.a, strlen(cwd) + strlen(av[0]) + 2);