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openssh/scp.c
djm@openbsd.org 4f0a676486
upstream: scp: when copying local->remote, check that source file 
exists before opening SFTP connection to the server. Based on GHPR#370 ok
dtucker, markus

OpenBSD-Commit-ID: b4dd68e15bfe22ce4fac9960a1066a2b721e54fb
2023-03-27 14:28:00 +11:00

2263 lines
53 KiB
C
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/* $OpenBSD: scp.c,v 1.254 2023/03/27 03:25:08 djm Exp $ */
/*
* scp - secure remote copy. This is basically patched BSD rcp which
* uses ssh to do the data transfer (instead of using rcmd).
*
* NOTE: This version should NOT be suid root. (This uses ssh to
* do the transfer and ssh has the necessary privileges.)
*
* 1995 Timo Rinne <tri@iki.fi>, Tatu Ylonen <ylo@cs.hut.fi>
*
* As far as I am concerned, the code I have written for this software
* can be used freely for any purpose. Any derived versions of this
* software must be clearly marked as such, and if the derived work is
* incompatible with the protocol description in the RFC file, it must be
* called by a name other than "ssh" or "Secure Shell".
*/
/*
* Copyright (c) 1999 Theo de Raadt. All rights reserved.
* Copyright (c) 1999 Aaron Campbell. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/*
* Parts from:
*
* Copyright (c) 1983, 1990, 1992, 1993, 1995
* 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. 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.
*
*/
#include "includes.h"
#include <sys/types.h>
#ifdef HAVE_SYS_STAT_H
# include <sys/stat.h>
#endif
#ifdef HAVE_POLL_H
#include <poll.h>
#else
# ifdef HAVE_SYS_POLL_H
# include <sys/poll.h>
# endif
#endif
#ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
#endif
#include <sys/wait.h>
#include <sys/uio.h>
#include <ctype.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#ifdef HAVE_FNMATCH_H
#include <fnmatch.h>
#endif
#ifdef USE_SYSTEM_GLOB
# include <glob.h>
#else
# include "openbsd-compat/glob.h"
#endif
#ifdef HAVE_LIBGEN_H
#include <libgen.h>
#endif
#include <limits.h>
#ifdef HAVE_UTIL_H
# include <util.h>
#endif
#include <locale.h>
#include <pwd.h>
#include <signal.h>
#include <stdarg.h>
#ifdef HAVE_STDINT_H
# include <stdint.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H) && !defined(BROKEN_STRNVIS)
#include <vis.h>
#endif
#include "xmalloc.h"
#include "ssh.h"
#include "atomicio.h"
#include "pathnames.h"
#include "log.h"
#include "misc.h"
#include "progressmeter.h"
#include "utf8.h"
#include "sftp.h"
#include "sftp-common.h"
#include "sftp-client.h"
extern char *__progname;
#define COPY_BUFLEN 16384
int do_cmd(char *, char *, char *, int, int, char *, int *, int *, pid_t *);
int do_cmd2(char *, char *, int, char *, int, int);
/* Struct for addargs */
arglist args;
arglist remote_remote_args;
/* Bandwidth limit */
long long limit_kbps = 0;
struct bwlimit bwlimit;
/* Name of current file being transferred. */
char *curfile;
/* This is set to non-zero to enable verbose mode. */
int verbose_mode = 0;
LogLevel log_level = SYSLOG_LEVEL_INFO;
/* This is set to zero if the progressmeter is not desired. */
int showprogress = 1;
/*
* This is set to non-zero if remote-remote copy should be piped
* through this process.
*/
int throughlocal = 1;
/* Non-standard port to use for the ssh connection or -1. */
int sshport = -1;
/* This is the program to execute for the secured connection. ("ssh" or -S) */
char *ssh_program = _PATH_SSH_PROGRAM;
/* This is used to store the pid of ssh_program */
pid_t do_cmd_pid = -1;
pid_t do_cmd_pid2 = -1;
/* SFTP copy parameters */
size_t sftp_copy_buflen;
size_t sftp_nrequests;
/* Needed for sftp */
volatile sig_atomic_t interrupted = 0;
int remote_glob(struct sftp_conn *, const char *, int,
int (*)(const char *, int), glob_t *); /* proto for sftp-glob.c */
static void
killchild(int signo)
{
if (do_cmd_pid > 1) {
kill(do_cmd_pid, signo ? signo : SIGTERM);
waitpid(do_cmd_pid, NULL, 0);
}
if (do_cmd_pid2 > 1) {
kill(do_cmd_pid2, signo ? signo : SIGTERM);
waitpid(do_cmd_pid2, NULL, 0);
}
if (signo)
_exit(1);
exit(1);
}
static void
suspone(int pid, int signo)
{
int status;
if (pid > 1) {
kill(pid, signo);
while (waitpid(pid, &status, WUNTRACED) == -1 &&
errno == EINTR)
;
}
}
static void
suspchild(int signo)
{
suspone(do_cmd_pid, signo);
suspone(do_cmd_pid2, signo);
kill(getpid(), SIGSTOP);
}
static int
do_local_cmd(arglist *a)
{
u_int i;
int status;
pid_t pid;
if (a->num == 0)
fatal("do_local_cmd: no arguments");
if (verbose_mode) {
fprintf(stderr, "Executing:");
for (i = 0; i < a->num; i++)
fmprintf(stderr, " %s", a->list[i]);
fprintf(stderr, "\n");
}
if ((pid = fork()) == -1)
fatal("do_local_cmd: fork: %s", strerror(errno));
if (pid == 0) {
execvp(a->list[0], a->list);
perror(a->list[0]);
exit(1);
}
do_cmd_pid = pid;
ssh_signal(SIGTERM, killchild);
ssh_signal(SIGINT, killchild);
ssh_signal(SIGHUP, killchild);
while (waitpid(pid, &status, 0) == -1)
if (errno != EINTR)
fatal("do_local_cmd: waitpid: %s", strerror(errno));
do_cmd_pid = -1;
if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
return (-1);
return (0);
}
/*
* This function executes the given command as the specified user on the
* given host. This returns < 0 if execution fails, and >= 0 otherwise. This
* assigns the input and output file descriptors on success.
*/
int
do_cmd(char *program, char *host, char *remuser, int port, int subsystem,
char *cmd, int *fdin, int *fdout, pid_t *pid)
{
#ifdef USE_PIPES
int pin[2], pout[2];
#else
int sv[2];
#endif
if (verbose_mode)
fmprintf(stderr,
"Executing: program %s host %s, user %s, command %s\n",
program, host,
remuser ? remuser : "(unspecified)", cmd);
if (port == -1)
port = sshport;
#ifdef USE_PIPES
if (pipe(pin) == -1 || pipe(pout) == -1)
fatal("pipe: %s", strerror(errno));
#else
/* Create a socket pair for communicating with ssh. */
if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv) == -1)
fatal("socketpair: %s", strerror(errno));
#endif
ssh_signal(SIGTSTP, suspchild);
ssh_signal(SIGTTIN, suspchild);
ssh_signal(SIGTTOU, suspchild);
/* Fork a child to execute the command on the remote host using ssh. */
*pid = fork();
switch (*pid) {
case -1:
fatal("fork: %s", strerror(errno));
case 0:
/* Child. */
#ifdef USE_PIPES
if (dup2(pin[0], STDIN_FILENO) == -1 ||
dup2(pout[1], STDOUT_FILENO) == -1) {
error("dup2: %s", strerror(errno));
_exit(1);
}
close(pin[0]);
close(pin[1]);
close(pout[0]);
close(pout[1]);
#else
if (dup2(sv[0], STDIN_FILENO) == -1 ||
dup2(sv[0], STDOUT_FILENO) == -1) {
error("dup2: %s", strerror(errno));
_exit(1);
}
close(sv[0]);
close(sv[1]);
#endif
replacearg(&args, 0, "%s", program);
if (port != -1) {
addargs(&args, "-p");
addargs(&args, "%d", port);
}
if (remuser != NULL) {
addargs(&args, "-l");
addargs(&args, "%s", remuser);
}
if (subsystem)
addargs(&args, "-s");
addargs(&args, "--");
addargs(&args, "%s", host);
addargs(&args, "%s", cmd);
execvp(program, args.list);
perror(program);
_exit(1);
default:
/* Parent. Close the other side, and return the local side. */
#ifdef USE_PIPES
close(pin[0]);
close(pout[1]);
*fdout = pin[1];
*fdin = pout[0];
#else
close(sv[0]);
*fdin = sv[1];
*fdout = sv[1];
#endif
ssh_signal(SIGTERM, killchild);
ssh_signal(SIGINT, killchild);
ssh_signal(SIGHUP, killchild);
return 0;
}
}
/*
* This function executes a command similar to do_cmd(), but expects the
* input and output descriptors to be setup by a previous call to do_cmd().
* This way the input and output of two commands can be connected.
*/
int
do_cmd2(char *host, char *remuser, int port, char *cmd,
int fdin, int fdout)
{
int status;
pid_t pid;
if (verbose_mode)
fmprintf(stderr,
"Executing: 2nd program %s host %s, user %s, command %s\n",
ssh_program, host,
remuser ? remuser : "(unspecified)", cmd);
if (port == -1)
port = sshport;
/* Fork a child to execute the command on the remote host using ssh. */
pid = fork();
if (pid == 0) {
if (dup2(fdin, 0) == -1)
perror("dup2");
if (dup2(fdout, 1) == -1)
perror("dup2");
replacearg(&args, 0, "%s", ssh_program);
if (port != -1) {
addargs(&args, "-p");
addargs(&args, "%d", port);
}
if (remuser != NULL) {
addargs(&args, "-l");
addargs(&args, "%s", remuser);
}
addargs(&args, "-oBatchMode=yes");
addargs(&args, "--");
addargs(&args, "%s", host);
addargs(&args, "%s", cmd);
execvp(ssh_program, args.list);
perror(ssh_program);
exit(1);
} else if (pid == -1) {
fatal("fork: %s", strerror(errno));
}
while (waitpid(pid, &status, 0) == -1)
if (errno != EINTR)
fatal("do_cmd2: waitpid: %s", strerror(errno));
return 0;
}
typedef struct {
size_t cnt;
char *buf;
} BUF;
BUF *allocbuf(BUF *, int, int);
void lostconn(int);
int okname(char *);
void run_err(const char *,...)
__attribute__((__format__ (printf, 1, 2)))
__attribute__((__nonnull__ (1)));
int note_err(const char *,...)
__attribute__((__format__ (printf, 1, 2)));
void verifydir(char *);
struct passwd *pwd;
uid_t userid;
int errs, remin, remout, remin2, remout2;
int Tflag, pflag, iamremote, iamrecursive, targetshouldbedirectory;
#define CMDNEEDS 64
char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
enum scp_mode_e {
MODE_SCP,
MODE_SFTP
};
int response(void);
void rsource(char *, struct stat *);
void sink(int, char *[], const char *);
void source(int, char *[]);
void tolocal(int, char *[], enum scp_mode_e, char *sftp_direct);
void toremote(int, char *[], enum scp_mode_e, char *sftp_direct);
void usage(void);
void source_sftp(int, char *, char *, struct sftp_conn *);
void sink_sftp(int, char *, const char *, struct sftp_conn *);
void throughlocal_sftp(struct sftp_conn *, struct sftp_conn *,
char *, char *);
int
main(int argc, char **argv)
{
int ch, fflag, tflag, status, r, n;
char **newargv, *argv0;
const char *errstr;
extern char *optarg;
extern int optind;
enum scp_mode_e mode = MODE_SFTP;
char *sftp_direct = NULL;
long long llv;
/* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
sanitise_stdfd();
msetlocale();
/* Copy argv, because we modify it */
argv0 = argv[0];
newargv = xcalloc(MAXIMUM(argc + 1, 1), sizeof(*newargv));
for (n = 0; n < argc; n++)
newargv[n] = xstrdup(argv[n]);
argv = newargv;
__progname = ssh_get_progname(argv[0]);
log_init(argv0, log_level, SYSLOG_FACILITY_USER, 2);
memset(&args, '\0', sizeof(args));
memset(&remote_remote_args, '\0', sizeof(remote_remote_args));
args.list = remote_remote_args.list = NULL;
addargs(&args, "%s", ssh_program);
addargs(&args, "-x");
addargs(&args, "-oPermitLocalCommand=no");
addargs(&args, "-oClearAllForwardings=yes");
addargs(&args, "-oRemoteCommand=none");
addargs(&args, "-oRequestTTY=no");
fflag = Tflag = tflag = 0;
while ((ch = getopt(argc, argv,
"12346ABCTdfOpqRrstvD:F:J:M:P:S:c:i:l:o:X:")) != -1) {
switch (ch) {
/* User-visible flags. */
case '1':
fatal("SSH protocol v.1 is no longer supported");
break;
case '2':
/* Ignored */
break;
case 'A':
case '4':
case '6':
case 'C':
addargs(&args, "-%c", ch);
addargs(&remote_remote_args, "-%c", ch);
break;
case 'D':
sftp_direct = optarg;
break;
case '3':
throughlocal = 1;
break;
case 'R':
throughlocal = 0;
break;
case 'o':
case 'c':
case 'i':
case 'F':
case 'J':
addargs(&remote_remote_args, "-%c", ch);
addargs(&remote_remote_args, "%s", optarg);
addargs(&args, "-%c", ch);
addargs(&args, "%s", optarg);
break;
case 'O':
mode = MODE_SCP;
break;
case 's':
mode = MODE_SFTP;
break;
case 'P':
sshport = a2port(optarg);
if (sshport <= 0)
fatal("bad port \"%s\"\n", optarg);
break;
case 'B':
addargs(&remote_remote_args, "-oBatchmode=yes");
addargs(&args, "-oBatchmode=yes");
break;
case 'l':
limit_kbps = strtonum(optarg, 1, 100 * 1024 * 1024,
&errstr);
if (errstr != NULL)
usage();
limit_kbps *= 1024; /* kbps */
bandwidth_limit_init(&bwlimit, limit_kbps, COPY_BUFLEN);
break;
case 'p':
pflag = 1;
break;
case 'r':
iamrecursive = 1;
break;
case 'S':
ssh_program = xstrdup(optarg);
break;
case 'v':
addargs(&args, "-v");
addargs(&remote_remote_args, "-v");
if (verbose_mode == 0)
log_level = SYSLOG_LEVEL_DEBUG1;
else if (log_level < SYSLOG_LEVEL_DEBUG3)
log_level++;
verbose_mode = 1;
break;
case 'q':
addargs(&args, "-q");
addargs(&remote_remote_args, "-q");
showprogress = 0;
break;
case 'X':
/* Please keep in sync with sftp.c -X */
if (strncmp(optarg, "buffer=", 7) == 0) {
r = scan_scaled(optarg + 7, &llv);
if (r == 0 && (llv <= 0 || llv > 256 * 1024)) {
r = -1;
errno = EINVAL;
}
if (r == -1) {
fatal("Invalid buffer size \"%s\": %s",
optarg + 7, strerror(errno));
}
sftp_copy_buflen = (size_t)llv;
} else if (strncmp(optarg, "nrequests=", 10) == 0) {
llv = strtonum(optarg + 10, 1, 256 * 1024,
&errstr);
if (errstr != NULL) {
fatal("Invalid number of requests "
"\"%s\": %s", optarg + 10, errstr);
}
sftp_nrequests = (size_t)llv;
} else {
fatal("Invalid -X option");
}
break;
/* Server options. */
case 'd':
targetshouldbedirectory = 1;
break;
case 'f': /* "from" */
iamremote = 1;
fflag = 1;
break;
case 't': /* "to" */
iamremote = 1;
tflag = 1;
#ifdef HAVE_CYGWIN
setmode(0, O_BINARY);
#endif
break;
case 'T':
Tflag = 1;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
log_init(argv0, log_level, SYSLOG_FACILITY_USER, 2);
/* Do this last because we want the user to be able to override it */
addargs(&args, "-oForwardAgent=no");
if (iamremote)
mode = MODE_SCP;
if ((pwd = getpwuid(userid = getuid())) == NULL)
fatal("unknown user %u", (u_int) userid);
if (!isatty(STDOUT_FILENO))
showprogress = 0;
if (pflag) {
/* Cannot pledge: -p allows setuid/setgid files... */
} else {
if (pledge("stdio rpath wpath cpath fattr tty proc exec",
NULL) == -1) {
perror("pledge");
exit(1);
}
}
remin = STDIN_FILENO;
remout = STDOUT_FILENO;
if (fflag) {
/* Follow "protocol", send data. */
(void) response();
source(argc, argv);
exit(errs != 0);
}
if (tflag) {
/* Receive data. */
sink(argc, argv, NULL);
exit(errs != 0);
}
if (argc < 2)
usage();
if (argc > 2)
targetshouldbedirectory = 1;
remin = remout = -1;
do_cmd_pid = -1;
/* Command to be executed on remote system using "ssh". */
(void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
verbose_mode ? " -v" : "",
iamrecursive ? " -r" : "", pflag ? " -p" : "",
targetshouldbedirectory ? " -d" : "");
(void) ssh_signal(SIGPIPE, lostconn);
if (colon(argv[argc - 1])) /* Dest is remote host. */
toremote(argc, argv, mode, sftp_direct);
else {
if (targetshouldbedirectory)
verifydir(argv[argc - 1]);
tolocal(argc, argv, mode, sftp_direct); /* Dest is local host. */
}
/*
* Finally check the exit status of the ssh process, if one was forked
* and no error has occurred yet
*/
if (do_cmd_pid != -1 && (mode == MODE_SFTP || errs == 0)) {
if (remin != -1)
(void) close(remin);
if (remout != -1)
(void) close(remout);
if (waitpid(do_cmd_pid, &status, 0) == -1)
errs = 1;
else {
if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
errs = 1;
}
}
exit(errs != 0);
}
/* Callback from atomicio6 to update progress meter and limit bandwidth */
static int
scpio(void *_cnt, size_t s)
{
off_t *cnt = (off_t *)_cnt;
*cnt += s;
refresh_progress_meter(0);
if (limit_kbps > 0)
bandwidth_limit(&bwlimit, s);
return 0;
}
static int
do_times(int fd, int verb, const struct stat *sb)
{
/* strlen(2^64) == 20; strlen(10^6) == 7 */
char buf[(20 + 7 + 2) * 2 + 2];
(void)snprintf(buf, sizeof(buf), "T%llu 0 %llu 0\n",
(unsigned long long) (sb->st_mtime < 0 ? 0 : sb->st_mtime),
(unsigned long long) (sb->st_atime < 0 ? 0 : sb->st_atime));
if (verb) {
fprintf(stderr, "File mtime %lld atime %lld\n",
(long long)sb->st_mtime, (long long)sb->st_atime);
fprintf(stderr, "Sending file timestamps: %s", buf);
}
(void) atomicio(vwrite, fd, buf, strlen(buf));
return (response());
}
static int
parse_scp_uri(const char *uri, char **userp, char **hostp, int *portp,
char **pathp)
{
int r;
r = parse_uri("scp", uri, userp, hostp, portp, pathp);
if (r == 0 && *pathp == NULL)
*pathp = xstrdup(".");
return r;
}
/* Appends a string to an array; returns 0 on success, -1 on alloc failure */
static int
append(char *cp, char ***ap, size_t *np)
{
char **tmp;
if ((tmp = reallocarray(*ap, *np + 1, sizeof(*tmp))) == NULL)
return -1;
tmp[(*np)] = cp;
(*np)++;
*ap = tmp;
return 0;
}
/*
* Finds the start and end of the first brace pair in the pattern.
* returns 0 on success or -1 for invalid patterns.
*/
static int
find_brace(const char *pattern, int *startp, int *endp)
{
int i;
int in_bracket, brace_level;
*startp = *endp = -1;
in_bracket = brace_level = 0;
for (i = 0; i < INT_MAX && *endp < 0 && pattern[i] != '\0'; i++) {
switch (pattern[i]) {
case '\\':
/* skip next character */
if (pattern[i + 1] != '\0')
i++;
break;
case '[':
in_bracket = 1;
break;
case ']':
in_bracket = 0;
break;
case '{':
if (in_bracket)
break;
if (pattern[i + 1] == '}') {
/* Protect a single {}, for find(1), like csh */
i++; /* skip */
break;
}
if (*startp == -1)
*startp = i;
brace_level++;
break;
case '}':
if (in_bracket)
break;
if (*startp < 0) {
/* Unbalanced brace */
return -1;
}
if (--brace_level <= 0)
*endp = i;
break;
}
}
/* unbalanced brackets/braces */
if (*endp < 0 && (*startp >= 0 || in_bracket))
return -1;
return 0;
}
/*
* Assembles and records a successfully-expanded pattern, returns -1 on
* alloc failure.
*/
static int
emit_expansion(const char *pattern, int brace_start, int brace_end,
int sel_start, int sel_end, char ***patternsp, size_t *npatternsp)
{
char *cp;
int o = 0, tail_len = strlen(pattern + brace_end + 1);
if ((cp = malloc(brace_start + (sel_end - sel_start) +
tail_len + 1)) == NULL)
return -1;
/* Pattern before initial brace */
if (brace_start > 0) {
memcpy(cp, pattern, brace_start);
o = brace_start;
}
/* Current braced selection */
if (sel_end - sel_start > 0) {
memcpy(cp + o, pattern + sel_start,
sel_end - sel_start);
o += sel_end - sel_start;
}
/* Remainder of pattern after closing brace */
if (tail_len > 0) {
memcpy(cp + o, pattern + brace_end + 1, tail_len);
o += tail_len;
}
cp[o] = '\0';
if (append(cp, patternsp, npatternsp) != 0) {
free(cp);
return -1;
}
return 0;
}
/*
* Expand the first encountered brace in pattern, appending the expanded
* patterns it yielded to the *patternsp array.
*
* Returns 0 on success or -1 on allocation failure.
*
* Signals whether expansion was performed via *expanded and whether
* pattern was invalid via *invalid.
*/
static int
brace_expand_one(const char *pattern, char ***patternsp, size_t *npatternsp,
int *expanded, int *invalid)
{
int i;
int in_bracket, brace_start, brace_end, brace_level;
int sel_start, sel_end;
*invalid = *expanded = 0;
if (find_brace(pattern, &brace_start, &brace_end) != 0) {
*invalid = 1;
return 0;
} else if (brace_start == -1)
return 0;
in_bracket = brace_level = 0;
for (i = sel_start = brace_start + 1; i < brace_end; i++) {
switch (pattern[i]) {
case '{':
if (in_bracket)
break;
brace_level++;
break;
case '}':
if (in_bracket)
break;
brace_level--;
break;
case '[':
in_bracket = 1;
break;
case ']':
in_bracket = 0;
break;
case '\\':
if (i < brace_end - 1)
i++; /* skip */
break;
}
if (pattern[i] == ',' || i == brace_end - 1) {
if (in_bracket || brace_level > 0)
continue;
/* End of a selection, emit an expanded pattern */
/* Adjust end index for last selection */
sel_end = (i == brace_end - 1) ? brace_end : i;
if (emit_expansion(pattern, brace_start, brace_end,
sel_start, sel_end, patternsp, npatternsp) != 0)
return -1;
/* move on to the next selection */
sel_start = i + 1;
continue;
}
}
if (in_bracket || brace_level > 0) {
*invalid = 1;
return 0;
}
/* success */
*expanded = 1;
return 0;
}
/* Expand braces from pattern. Returns 0 on success, -1 on failure */
static int
brace_expand(const char *pattern, char ***patternsp, size_t *npatternsp)
{
char *cp, *cp2, **active = NULL, **done = NULL;
size_t i, nactive = 0, ndone = 0;
int ret = -1, invalid = 0, expanded = 0;
*patternsp = NULL;
*npatternsp = 0;
/* Start the worklist with the original pattern */
if ((cp = strdup(pattern)) == NULL)
return -1;
if (append(cp, &active, &nactive) != 0) {
free(cp);
return -1;
}
while (nactive > 0) {
cp = active[nactive - 1];
nactive--;
if (brace_expand_one(cp, &active, &nactive,
&expanded, &invalid) == -1) {
free(cp);
goto fail;
}
if (invalid)
fatal_f("invalid brace pattern \"%s\"", cp);
if (expanded) {
/*
* Current entry expanded to new entries on the
* active list; discard the progenitor pattern.
*/
free(cp);
continue;
}
/*
* Pattern did not expand; append the finename component to
* the completed list
*/
if ((cp2 = strrchr(cp, '/')) != NULL)
*cp2++ = '\0';
else
cp2 = cp;
if (append(xstrdup(cp2), &done, &ndone) != 0) {
free(cp);
goto fail;
}
free(cp);
}
/* success */
*patternsp = done;
*npatternsp = ndone;
done = NULL;
ndone = 0;
ret = 0;
fail:
for (i = 0; i < nactive; i++)
free(active[i]);
free(active);
for (i = 0; i < ndone; i++)
free(done[i]);
free(done);
return ret;
}
static struct sftp_conn *
do_sftp_connect(char *host, char *user, int port, char *sftp_direct,
int *reminp, int *remoutp, int *pidp)
{
if (sftp_direct == NULL) {
if (do_cmd(ssh_program, host, user, port, 1, "sftp",
reminp, remoutp, pidp) < 0)
return NULL;
} else {
freeargs(&args);
addargs(&args, "sftp-server");
if (do_cmd(sftp_direct, host, NULL, -1, 0, "sftp",
reminp, remoutp, pidp) < 0)
return NULL;
}
return do_init(*reminp, *remoutp,
sftp_copy_buflen, sftp_nrequests, limit_kbps);
}
void
toremote(int argc, char **argv, enum scp_mode_e mode, char *sftp_direct)
{
char *suser = NULL, *host = NULL, *src = NULL;
char *bp, *tuser, *thost, *targ;
int sport = -1, tport = -1;
struct sftp_conn *conn = NULL, *conn2 = NULL;
arglist alist;
int i, r, status;
struct stat sb;
u_int j;
memset(&alist, '\0', sizeof(alist));
alist.list = NULL;
/* Parse target */
r = parse_scp_uri(argv[argc - 1], &tuser, &thost, &tport, &targ);
if (r == -1) {
fmprintf(stderr, "%s: invalid uri\n", argv[argc - 1]);
++errs;
goto out;
}
if (r != 0) {
if (parse_user_host_path(argv[argc - 1], &tuser, &thost,
&targ) == -1) {
fmprintf(stderr, "%s: invalid target\n", argv[argc - 1]);
++errs;
goto out;
}
}
/* Parse source files */
for (i = 0; i < argc - 1; i++) {
free(suser);
free(host);
free(src);
r = parse_scp_uri(argv[i], &suser, &host, &sport, &src);
if (r == -1) {
fmprintf(stderr, "%s: invalid uri\n", argv[i]);
++errs;
continue;
}
if (r != 0) {
parse_user_host_path(argv[i], &suser, &host, &src);
}
if (suser != NULL && !okname(suser)) {
++errs;
continue;
}
if (host && throughlocal) { /* extended remote to remote */
if (mode == MODE_SFTP) {
if (remin == -1) {
/* Connect to dest now */
conn = do_sftp_connect(thost, tuser,
tport, sftp_direct,
&remin, &remout, &do_cmd_pid);
if (conn == NULL) {
fatal("Unable to open "
"destination connection");
}
debug3_f("origin in %d out %d pid %ld",
remin, remout, (long)do_cmd_pid);
}
/*
* XXX remember suser/host/sport and only
* reconnect if they change between arguments.
* would save reconnections for cases like
* scp -3 hosta:/foo hosta:/bar hostb:
*/
/* Connect to origin now */
conn2 = do_sftp_connect(host, suser,
sport, sftp_direct,
&remin2, &remout2, &do_cmd_pid2);
if (conn2 == NULL) {
fatal("Unable to open "
"source connection");
}
debug3_f("destination in %d out %d pid %ld",
remin2, remout2, (long)do_cmd_pid2);
throughlocal_sftp(conn2, conn, src, targ);
(void) close(remin2);
(void) close(remout2);
remin2 = remout2 = -1;
if (waitpid(do_cmd_pid2, &status, 0) == -1)
++errs;
else if (!WIFEXITED(status) ||
WEXITSTATUS(status) != 0)
++errs;
do_cmd_pid2 = -1;
continue;
} else {
xasprintf(&bp, "%s -f %s%s", cmd,
*src == '-' ? "-- " : "", src);
if (do_cmd(ssh_program, host, suser, sport, 0,
bp, &remin, &remout, &do_cmd_pid) < 0)
exit(1);
free(bp);
xasprintf(&bp, "%s -t %s%s", cmd,
*targ == '-' ? "-- " : "", targ);
if (do_cmd2(thost, tuser, tport, bp,
remin, remout) < 0)
exit(1);
free(bp);
(void) close(remin);
(void) close(remout);
remin = remout = -1;
}
} else if (host) { /* standard remote to remote */
/*
* Second remote user is passed to first remote side
* via scp command-line. Ensure it contains no obvious
* shell characters.
*/
if (tuser != NULL && !okname(tuser)) {
++errs;
continue;
}
if (tport != -1 && tport != SSH_DEFAULT_PORT) {
/* This would require the remote support URIs */
fatal("target port not supported with two "
"remote hosts and the -R option");
}
freeargs(&alist);
addargs(&alist, "%s", ssh_program);
addargs(&alist, "-x");
addargs(&alist, "-oClearAllForwardings=yes");
addargs(&alist, "-n");
for (j = 0; j < remote_remote_args.num; j++) {
addargs(&alist, "%s",
remote_remote_args.list[j]);
}
if (sport != -1) {
addargs(&alist, "-p");
addargs(&alist, "%d", sport);
}
if (suser) {
addargs(&alist, "-l");
addargs(&alist, "%s", suser);
}
addargs(&alist, "--");
addargs(&alist, "%s", host);
addargs(&alist, "%s", cmd);
addargs(&alist, "%s", src);
addargs(&alist, "%s%s%s:%s",
tuser ? tuser : "", tuser ? "@" : "",
thost, targ);
if (do_local_cmd(&alist) != 0)
errs = 1;
} else { /* local to remote */
if (mode == MODE_SFTP) {
/* no need to glob: already done by shell */
if (stat(argv[i], &sb) != 0) {
fatal("stat local \"%s\": %s", argv[i],
strerror(errno));
}
if (remin == -1) {
/* Connect to remote now */
conn = do_sftp_connect(thost, tuser,
tport, sftp_direct,
&remin, &remout, &do_cmd_pid);
if (conn == NULL) {
fatal("Unable to open sftp "
"connection");
}
}
/* The protocol */
source_sftp(1, argv[i], targ, conn);
continue;
}
/* SCP */
if (remin == -1) {
xasprintf(&bp, "%s -t %s%s", cmd,
*targ == '-' ? "-- " : "", targ);
if (do_cmd(ssh_program, thost, tuser, tport, 0,
bp, &remin, &remout, &do_cmd_pid) < 0)
exit(1);
if (response() < 0)
exit(1);
free(bp);
}
source(1, argv + i);
}
}
out:
if (mode == MODE_SFTP)
free(conn);
free(tuser);
free(thost);
free(targ);
free(suser);
free(host);
free(src);
}
void
tolocal(int argc, char **argv, enum scp_mode_e mode, char *sftp_direct)
{
char *bp, *host = NULL, *src = NULL, *suser = NULL;
arglist alist;
struct sftp_conn *conn = NULL;
int i, r, sport = -1;
memset(&alist, '\0', sizeof(alist));
alist.list = NULL;
for (i = 0; i < argc - 1; i++) {
free(suser);
free(host);
free(src);
r = parse_scp_uri(argv[i], &suser, &host, &sport, &src);
if (r == -1) {
fmprintf(stderr, "%s: invalid uri\n", argv[i]);
++errs;
continue;
}
if (r != 0)
parse_user_host_path(argv[i], &suser, &host, &src);
if (suser != NULL && !okname(suser)) {
++errs;
continue;
}
if (!host) { /* Local to local. */
freeargs(&alist);
addargs(&alist, "%s", _PATH_CP);
if (iamrecursive)
addargs(&alist, "-r");
if (pflag)
addargs(&alist, "-p");
addargs(&alist, "--");
addargs(&alist, "%s", argv[i]);
addargs(&alist, "%s", argv[argc-1]);
if (do_local_cmd(&alist))
++errs;
continue;
}
/* Remote to local. */
if (mode == MODE_SFTP) {
conn = do_sftp_connect(host, suser, sport,
sftp_direct, &remin, &remout, &do_cmd_pid);
if (conn == NULL) {
error("sftp connection failed");
++errs;
continue;
}
/* The protocol */
sink_sftp(1, argv[argc - 1], src, conn);
free(conn);
(void) close(remin);
(void) close(remout);
remin = remout = -1;
continue;
}
/* SCP */
xasprintf(&bp, "%s -f %s%s",
cmd, *src == '-' ? "-- " : "", src);
if (do_cmd(ssh_program, host, suser, sport, 0, bp,
&remin, &remout, &do_cmd_pid) < 0) {
free(bp);
++errs;
continue;
}
free(bp);
sink(1, argv + argc - 1, src);
(void) close(remin);
remin = remout = -1;
}
free(suser);
free(host);
free(src);
}
/* Prepare remote path, handling ~ by assuming cwd is the homedir */
static char *
prepare_remote_path(struct sftp_conn *conn, const char *path)
{
size_t nslash;
/* Handle ~ prefixed paths */
if (*path == '\0' || strcmp(path, "~") == 0)
return xstrdup(".");
if (*path != '~')
return xstrdup(path);
if (strncmp(path, "~/", 2) == 0) {
if ((nslash = strspn(path + 2, "/")) == strlen(path + 2))
return xstrdup(".");
return xstrdup(path + 2 + nslash);
}
if (can_expand_path(conn))
return do_expand_path(conn, path);
/* No protocol extension */
error("server expand-path extension is required "
"for ~user paths in SFTP mode");
return NULL;
}
void
source_sftp(int argc, char *src, char *targ, struct sftp_conn *conn)
{
char *target = NULL, *filename = NULL, *abs_dst = NULL;
int src_is_dir, target_is_dir;
Attrib a;
struct stat st;
memset(&a, '\0', sizeof(a));
if (stat(src, &st) != 0)
fatal("stat local \"%s\": %s", src, strerror(errno));
src_is_dir = S_ISDIR(st.st_mode);
if ((filename = basename(src)) == NULL)
fatal("basename \"%s\": %s", src, strerror(errno));
/*
* No need to glob here - the local shell already took care of
* the expansions
*/
if ((target = prepare_remote_path(conn, targ)) == NULL)
cleanup_exit(255);
target_is_dir = remote_is_dir(conn, target);
if (targetshouldbedirectory && !target_is_dir) {
debug("target directory \"%s\" does not exist", target);
a.flags = SSH2_FILEXFER_ATTR_PERMISSIONS;
a.perm = st.st_mode | 0700; /* ensure writable */
if (do_mkdir(conn, target, &a, 1) != 0)
cleanup_exit(255); /* error already logged */
target_is_dir = 1;
}
if (target_is_dir)
abs_dst = path_append(target, filename);
else {
abs_dst = target;
target = NULL;
}
debug3_f("copying local %s to remote %s", src, abs_dst);
if (src_is_dir && iamrecursive) {
if (upload_dir(conn, src, abs_dst, pflag,
SFTP_PROGRESS_ONLY, 0, 0, 1, 1) != 0) {
error("failed to upload directory %s to %s", src, targ);
errs = 1;
}
} else if (do_upload(conn, src, abs_dst, pflag, 0, 0, 1) != 0) {
error("failed to upload file %s to %s", src, targ);
errs = 1;
}
free(abs_dst);
free(target);
}
void
source(int argc, char **argv)
{
struct stat stb;
static BUF buffer;
BUF *bp;
off_t i, statbytes;
size_t amt, nr;
int fd = -1, haderr, indx;
char *last, *name, buf[PATH_MAX + 128], encname[PATH_MAX];
int len;
for (indx = 0; indx < argc; ++indx) {
name = argv[indx];
statbytes = 0;
len = strlen(name);
while (len > 1 && name[len-1] == '/')
name[--len] = '\0';
if ((fd = open(name, O_RDONLY|O_NONBLOCK)) == -1)
goto syserr;
if (strchr(name, '\n') != NULL) {
strnvis(encname, name, sizeof(encname), VIS_NL);
name = encname;
}
if (fstat(fd, &stb) == -1) {
syserr: run_err("%s: %s", name, strerror(errno));
goto next;
}
if (stb.st_size < 0) {
run_err("%s: %s", name, "Negative file size");
goto next;
}
unset_nonblock(fd);
switch (stb.st_mode & S_IFMT) {
case S_IFREG:
break;
case S_IFDIR:
if (iamrecursive) {
rsource(name, &stb);
goto next;
}
/* FALLTHROUGH */
default:
run_err("%s: not a regular file", name);
goto next;
}
if ((last = strrchr(name, '/')) == NULL)
last = name;
else
++last;
curfile = last;
if (pflag) {
if (do_times(remout, verbose_mode, &stb) < 0)
goto next;
}
#define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
snprintf(buf, sizeof buf, "C%04o %lld %s\n",
(u_int) (stb.st_mode & FILEMODEMASK),
(long long)stb.st_size, last);
if (verbose_mode)
fmprintf(stderr, "Sending file modes: %s", buf);
(void) atomicio(vwrite, remout, buf, strlen(buf));
if (response() < 0)
goto next;
if ((bp = allocbuf(&buffer, fd, COPY_BUFLEN)) == NULL) {
next: if (fd != -1) {
(void) close(fd);
fd = -1;
}
continue;
}
if (showprogress)
start_progress_meter(curfile, stb.st_size, &statbytes);
set_nonblock(remout);
for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
amt = bp->cnt;
if (i + (off_t)amt > stb.st_size)
amt = stb.st_size - i;
if (!haderr) {
if ((nr = atomicio(read, fd,
bp->buf, amt)) != amt) {
haderr = errno;
memset(bp->buf + nr, 0, amt - nr);
}
}
/* Keep writing after error to retain sync */
if (haderr) {
(void)atomicio(vwrite, remout, bp->buf, amt);
memset(bp->buf, 0, amt);
continue;
}
if (atomicio6(vwrite, remout, bp->buf, amt, scpio,
&statbytes) != amt)
haderr = errno;
}
unset_nonblock(remout);
if (fd != -1) {
if (close(fd) == -1 && !haderr)
haderr = errno;
fd = -1;
}
if (!haderr)
(void) atomicio(vwrite, remout, "", 1);
else
run_err("%s: %s", name, strerror(haderr));
(void) response();
if (showprogress)
stop_progress_meter();
}
}
void
rsource(char *name, struct stat *statp)
{
DIR *dirp;
struct dirent *dp;
char *last, *vect[1], path[PATH_MAX];
if (!(dirp = opendir(name))) {
run_err("%s: %s", name, strerror(errno));
return;
}
last = strrchr(name, '/');
if (last == NULL)
last = name;
else
last++;
if (pflag) {
if (do_times(remout, verbose_mode, statp) < 0) {
closedir(dirp);
return;
}
}
(void) snprintf(path, sizeof path, "D%04o %d %.1024s\n",
(u_int) (statp->st_mode & FILEMODEMASK), 0, last);
if (verbose_mode)
fmprintf(stderr, "Entering directory: %s", path);
(void) atomicio(vwrite, remout, path, strlen(path));
if (response() < 0) {
closedir(dirp);
return;
}
while ((dp = readdir(dirp)) != NULL) {
if (dp->d_ino == 0)
continue;
if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
continue;
if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) {
run_err("%s/%s: name too long", name, dp->d_name);
continue;
}
(void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name);
vect[0] = path;
source(1, vect);
}
(void) closedir(dirp);
(void) atomicio(vwrite, remout, "E\n", 2);
(void) response();
}
void
sink_sftp(int argc, char *dst, const char *src, struct sftp_conn *conn)
{
char *abs_src = NULL;
char *abs_dst = NULL;
glob_t g;
char *filename, *tmp = NULL;
int i, r, err = 0, dst_is_dir;
struct stat st;
memset(&g, 0, sizeof(g));
/*
* Here, we need remote glob as SFTP can not depend on remote shell
* expansions
*/
if ((abs_src = prepare_remote_path(conn, src)) == NULL) {
err = -1;
goto out;
}
debug3_f("copying remote %s to local %s", abs_src, dst);
if ((r = remote_glob(conn, abs_src, GLOB_NOCHECK|GLOB_MARK,
NULL, &g)) != 0) {
if (r == GLOB_NOSPACE)
error("%s: too many glob matches", src);
else
error("%s: %s", src, strerror(ENOENT));
err = -1;
goto out;
}
/* Did we actually get any matches back from the glob? */
if (g.gl_matchc == 0 && g.gl_pathc == 1 && g.gl_pathv[0] != 0) {
/*
* If nothing matched but a path returned, then it's probably
* a GLOB_NOCHECK result. Check whether the unglobbed path
* exists so we can give a nice error message early.
*/
if (do_stat(conn, g.gl_pathv[0], 1) == NULL) {
error("%s: %s", src, strerror(ENOENT));
err = -1;
goto out;
}
}
if ((r = stat(dst, &st)) != 0)
debug2_f("stat local \"%s\": %s", dst, strerror(errno));
dst_is_dir = r == 0 && S_ISDIR(st.st_mode);
if (g.gl_matchc > 1 && !dst_is_dir) {
if (r == 0) {
error("Multiple files match pattern, but destination "
"\"%s\" is not a directory", dst);
err = -1;
goto out;
}
debug2_f("creating destination \"%s\"", dst);
if (mkdir(dst, 0777) != 0) {
error("local mkdir \"%s\": %s", dst, strerror(errno));
err = -1;
goto out;
}
dst_is_dir = 1;
}
for (i = 0; g.gl_pathv[i] && !interrupted; i++) {
tmp = xstrdup(g.gl_pathv[i]);
if ((filename = basename(tmp)) == NULL) {
error("basename %s: %s", tmp, strerror(errno));
err = -1;
goto out;
}
if (dst_is_dir)
abs_dst = path_append(dst, filename);
else
abs_dst = xstrdup(dst);
debug("Fetching %s to %s\n", g.gl_pathv[i], abs_dst);
if (globpath_is_dir(g.gl_pathv[i]) && iamrecursive) {
if (download_dir(conn, g.gl_pathv[i], abs_dst, NULL,
pflag, SFTP_PROGRESS_ONLY, 0, 0, 1, 1) == -1)
err = -1;
} else {
if (do_download(conn, g.gl_pathv[i], abs_dst, NULL,
pflag, 0, 0, 1) == -1)
err = -1;
}
free(abs_dst);
abs_dst = NULL;
free(tmp);
tmp = NULL;
}
out:
free(abs_src);
free(tmp);
globfree(&g);
if (err == -1)
errs = 1;
}
#define TYPE_OVERFLOW(type, val) \
((sizeof(type) == 4 && (val) > INT32_MAX) || \
(sizeof(type) == 8 && (val) > INT64_MAX) || \
(sizeof(type) != 4 && sizeof(type) != 8))
void
sink(int argc, char **argv, const char *src)
{
static BUF buffer;
struct stat stb;
BUF *bp;
off_t i;
size_t j, count;
int amt, exists, first, ofd;
mode_t mode, omode, mask;
off_t size, statbytes;
unsigned long long ull;
int setimes, targisdir, wrerr;
char ch, *cp, *np, *targ, *why, *vect[1], buf[2048], visbuf[2048];
char **patterns = NULL;
size_t n, npatterns = 0;
struct timeval tv[2];
#define atime tv[0]
#define mtime tv[1]
#define SCREWUP(str) { why = str; goto screwup; }
if (TYPE_OVERFLOW(time_t, 0) || TYPE_OVERFLOW(off_t, 0))
SCREWUP("Unexpected off_t/time_t size");
setimes = targisdir = 0;
mask = umask(0);
if (!pflag)
(void) umask(mask);
if (argc != 1) {
run_err("ambiguous target");
exit(1);
}
targ = *argv;
if (targetshouldbedirectory)
verifydir(targ);
(void) atomicio(vwrite, remout, "", 1);
if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
targisdir = 1;
if (src != NULL && !iamrecursive && !Tflag) {
/*
* Prepare to try to restrict incoming filenames to match
* the requested destination file glob.
*/
if (brace_expand(src, &patterns, &npatterns) != 0)
fatal_f("could not expand pattern");
}
for (first = 1;; first = 0) {
cp = buf;
if (atomicio(read, remin, cp, 1) != 1)
goto done;
if (*cp++ == '\n')
SCREWUP("unexpected <newline>");
do {
if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
SCREWUP("lost connection");
*cp++ = ch;
} while (cp < &buf[sizeof(buf) - 1] && ch != '\n');
*cp = 0;
if (verbose_mode)
fmprintf(stderr, "Sink: %s", buf);
if (buf[0] == '\01' || buf[0] == '\02') {
if (iamremote == 0) {
(void) snmprintf(visbuf, sizeof(visbuf),
NULL, "%s", buf + 1);
(void) atomicio(vwrite, STDERR_FILENO,
visbuf, strlen(visbuf));
}
if (buf[0] == '\02')
exit(1);
++errs;
continue;
}
if (buf[0] == 'E') {
(void) atomicio(vwrite, remout, "", 1);
goto done;
}
if (ch == '\n')
*--cp = 0;
cp = buf;
if (*cp == 'T') {
setimes++;
cp++;
if (!isdigit((unsigned char)*cp))
SCREWUP("mtime.sec not present");
ull = strtoull(cp, &cp, 10);
if (!cp || *cp++ != ' ')
SCREWUP("mtime.sec not delimited");
if (TYPE_OVERFLOW(time_t, ull))
setimes = 0; /* out of range */
mtime.tv_sec = ull;
mtime.tv_usec = strtol(cp, &cp, 10);
if (!cp || *cp++ != ' ' || mtime.tv_usec < 0 ||
mtime.tv_usec > 999999)
SCREWUP("mtime.usec not delimited");
if (!isdigit((unsigned char)*cp))
SCREWUP("atime.sec not present");
ull = strtoull(cp, &cp, 10);
if (!cp || *cp++ != ' ')
SCREWUP("atime.sec not delimited");
if (TYPE_OVERFLOW(time_t, ull))
setimes = 0; /* out of range */
atime.tv_sec = ull;
atime.tv_usec = strtol(cp, &cp, 10);
if (!cp || *cp++ != '\0' || atime.tv_usec < 0 ||
atime.tv_usec > 999999)
SCREWUP("atime.usec not delimited");
(void) atomicio(vwrite, remout, "", 1);
continue;
}
if (*cp != 'C' && *cp != 'D') {
/*
* Check for the case "rcp remote:foo\* local:bar".
* In this case, the line "No match." can be returned
* by the shell before the rcp command on the remote is
* executed so the ^Aerror_message convention isn't
* followed.
*/
if (first) {
run_err("%s", cp);
exit(1);
}
SCREWUP("expected control record");
}
mode = 0;
for (++cp; cp < buf + 5; cp++) {
if (*cp < '0' || *cp > '7')
SCREWUP("bad mode");
mode = (mode << 3) | (*cp - '0');
}
if (!pflag)
mode &= ~mask;
if (*cp++ != ' ')
SCREWUP("mode not delimited");
if (!isdigit((unsigned char)*cp))
SCREWUP("size not present");
ull = strtoull(cp, &cp, 10);
if (!cp || *cp++ != ' ')
SCREWUP("size not delimited");
if (TYPE_OVERFLOW(off_t, ull))
SCREWUP("size out of range");
size = (off_t)ull;
if (*cp == '\0' || strchr(cp, '/') != NULL ||
strcmp(cp, ".") == 0 || strcmp(cp, "..") == 0) {
run_err("error: unexpected filename: %s", cp);
exit(1);
}
if (npatterns > 0) {
for (n = 0; n < npatterns; n++) {
if (strcmp(patterns[n], cp) == 0 ||
fnmatch(patterns[n], cp, 0) == 0)
break;
}
if (n >= npatterns)
SCREWUP("filename does not match request");
}
if (targisdir) {
static char *namebuf;
static size_t cursize;
size_t need;
need = strlen(targ) + strlen(cp) + 250;
if (need > cursize) {
free(namebuf);
namebuf = xmalloc(need);
cursize = need;
}
(void) snprintf(namebuf, need, "%s%s%s", targ,
strcmp(targ, "/") ? "/" : "", cp);
np = namebuf;
} else
np = targ;
curfile = cp;
exists = stat(np, &stb) == 0;
if (buf[0] == 'D') {
int mod_flag = pflag;
if (!iamrecursive)
SCREWUP("received directory without -r");
if (exists) {
if (!S_ISDIR(stb.st_mode)) {
errno = ENOTDIR;
goto bad;
}
if (pflag)
(void) chmod(np, mode);
} else {
/* Handle copying from a read-only directory */
mod_flag = 1;
if (mkdir(np, mode | S_IRWXU) == -1)
goto bad;
}
vect[0] = xstrdup(np);
sink(1, vect, src);
if (setimes) {
setimes = 0;
(void) utimes(vect[0], tv);
}
if (mod_flag)
(void) chmod(vect[0], mode);
free(vect[0]);
continue;
}
omode = mode;
mode |= S_IWUSR;
if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) == -1) {
bad: run_err("%s: %s", np, strerror(errno));
continue;
}
(void) atomicio(vwrite, remout, "", 1);
if ((bp = allocbuf(&buffer, ofd, COPY_BUFLEN)) == NULL) {
(void) close(ofd);
continue;
}
cp = bp->buf;
wrerr = 0;
/*
* NB. do not use run_err() unless immediately followed by
* exit() below as it may send a spurious reply that might
* desyncronise us from the peer. Use note_err() instead.
*/
statbytes = 0;
if (showprogress)
start_progress_meter(curfile, size, &statbytes);
set_nonblock(remin);
for (count = i = 0; i < size; i += bp->cnt) {
amt = bp->cnt;
if (i + amt > size)
amt = size - i;
count += amt;
do {
j = atomicio6(read, remin, cp, amt,
scpio, &statbytes);
if (j == 0) {
run_err("%s", j != EPIPE ?
strerror(errno) :
"dropped connection");
exit(1);
}
amt -= j;
cp += j;
} while (amt > 0);
if (count == bp->cnt) {
/* Keep reading so we stay sync'd up. */
if (!wrerr) {
if (atomicio(vwrite, ofd, bp->buf,
count) != count) {
note_err("%s: %s", np,
strerror(errno));
wrerr = 1;
}
}
count = 0;
cp = bp->buf;
}
}
unset_nonblock(remin);
if (count != 0 && !wrerr &&
atomicio(vwrite, ofd, bp->buf, count) != count) {
note_err("%s: %s", np, strerror(errno));
wrerr = 1;
}
if (!wrerr && (!exists || S_ISREG(stb.st_mode)) &&
ftruncate(ofd, size) != 0)
note_err("%s: truncate: %s", np, strerror(errno));
if (pflag) {
if (exists || omode != mode)
#ifdef HAVE_FCHMOD
if (fchmod(ofd, omode)) {
#else /* HAVE_FCHMOD */
if (chmod(np, omode)) {
#endif /* HAVE_FCHMOD */
note_err("%s: set mode: %s",
np, strerror(errno));
}
} else {
if (!exists && omode != mode)
#ifdef HAVE_FCHMOD
if (fchmod(ofd, omode & ~mask)) {
#else /* HAVE_FCHMOD */
if (chmod(np, omode & ~mask)) {
#endif /* HAVE_FCHMOD */
note_err("%s: set mode: %s",
np, strerror(errno));
}
}
if (close(ofd) == -1)
note_err("%s: close: %s", np, strerror(errno));
(void) response();
if (showprogress)
stop_progress_meter();
if (setimes && !wrerr) {
setimes = 0;
if (utimes(np, tv) == -1) {
note_err("%s: set times: %s",
np, strerror(errno));
}
}
/* If no error was noted then signal success for this file */
if (note_err(NULL) == 0)
(void) atomicio(vwrite, remout, "", 1);
}
done:
for (n = 0; n < npatterns; n++)
free(patterns[n]);
free(patterns);
return;
screwup:
for (n = 0; n < npatterns; n++)
free(patterns[n]);
free(patterns);
run_err("protocol error: %s", why);
exit(1);
}
void
throughlocal_sftp(struct sftp_conn *from, struct sftp_conn *to,
char *src, char *targ)
{
char *target = NULL, *filename = NULL, *abs_dst = NULL;
char *abs_src = NULL, *tmp = NULL;
glob_t g;
int i, r, targetisdir, err = 0;
if ((filename = basename(src)) == NULL)
fatal("basename %s: %s", src, strerror(errno));
if ((abs_src = prepare_remote_path(from, src)) == NULL ||
(target = prepare_remote_path(to, targ)) == NULL)
cleanup_exit(255);
memset(&g, 0, sizeof(g));
targetisdir = remote_is_dir(to, target);
if (!targetisdir && targetshouldbedirectory) {
error("%s: destination is not a directory", targ);
err = -1;
goto out;
}
debug3_f("copying remote %s to remote %s", abs_src, target);
if ((r = remote_glob(from, abs_src, GLOB_NOCHECK|GLOB_MARK,
NULL, &g)) != 0) {
if (r == GLOB_NOSPACE)
error("%s: too many glob matches", src);
else
error("%s: %s", src, strerror(ENOENT));
err = -1;
goto out;
}
/* Did we actually get any matches back from the glob? */
if (g.gl_matchc == 0 && g.gl_pathc == 1 && g.gl_pathv[0] != 0) {
/*
* If nothing matched but a path returned, then it's probably
* a GLOB_NOCHECK result. Check whether the unglobbed path
* exists so we can give a nice error message early.
*/
if (do_stat(from, g.gl_pathv[0], 1) == NULL) {
error("%s: %s", src, strerror(ENOENT));
err = -1;
goto out;
}
}
for (i = 0; g.gl_pathv[i] && !interrupted; i++) {
tmp = xstrdup(g.gl_pathv[i]);
if ((filename = basename(tmp)) == NULL) {
error("basename %s: %s", tmp, strerror(errno));
err = -1;
goto out;
}
if (targetisdir)
abs_dst = path_append(target, filename);
else
abs_dst = xstrdup(target);
debug("Fetching %s to %s\n", g.gl_pathv[i], abs_dst);
if (globpath_is_dir(g.gl_pathv[i]) && iamrecursive) {
if (crossload_dir(from, to, g.gl_pathv[i], abs_dst,
NULL, pflag, SFTP_PROGRESS_ONLY, 1) == -1)
err = -1;
} else {
if (do_crossload(from, to, g.gl_pathv[i], abs_dst, NULL,
pflag) == -1)
err = -1;
}
free(abs_dst);
abs_dst = NULL;
free(tmp);
tmp = NULL;
}
out:
free(abs_src);
free(abs_dst);
free(target);
free(tmp);
globfree(&g);
if (err == -1)
errs = 1;
}
int
response(void)
{
char ch, *cp, resp, rbuf[2048], visbuf[2048];
if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp))
lostconn(0);
cp = rbuf;
switch (resp) {
case 0: /* ok */
return (0);
default:
*cp++ = resp;
/* FALLTHROUGH */
case 1: /* error, followed by error msg */
case 2: /* fatal error, "" */
do {
if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
lostconn(0);
*cp++ = ch;
} while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
if (!iamremote) {
cp[-1] = '\0';
(void) snmprintf(visbuf, sizeof(visbuf),
NULL, "%s\n", rbuf);
(void) atomicio(vwrite, STDERR_FILENO,
visbuf, strlen(visbuf));
}
++errs;
if (resp == 1)
return (-1);
exit(1);
}
/* NOTREACHED */
}
void
usage(void)
{
(void) fprintf(stderr,
"usage: scp [-346ABCOpqRrsTv] [-c cipher] [-D sftp_server_path] [-F ssh_config]\n"
" [-i identity_file] [-J destination] [-l limit] [-o ssh_option]\n"
" [-P port] [-S program] [-X sftp_option] source ... target\n");
exit(1);
}
void
run_err(const char *fmt,...)
{
static FILE *fp;
va_list ap;
++errs;
if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) {
(void) fprintf(fp, "%c", 0x01);
(void) fprintf(fp, "scp: ");
va_start(ap, fmt);
(void) vfprintf(fp, fmt, ap);
va_end(ap);
(void) fprintf(fp, "\n");
(void) fflush(fp);
}
if (!iamremote) {
va_start(ap, fmt);
vfmprintf(stderr, fmt, ap);
va_end(ap);
fprintf(stderr, "\n");
}
}
/*
* Notes a sink error for sending at the end of a file transfer. Returns 0 if
* no error has been noted or -1 otherwise. Use note_err(NULL) to flush
* any active error at the end of the transfer.
*/
int
note_err(const char *fmt, ...)
{
static char *emsg;
va_list ap;
/* Replay any previously-noted error */
if (fmt == NULL) {
if (emsg == NULL)
return 0;
run_err("%s", emsg);
free(emsg);
emsg = NULL;
return -1;
}
errs++;
/* Prefer first-noted error */
if (emsg != NULL)
return -1;
va_start(ap, fmt);
vasnmprintf(&emsg, INT_MAX, NULL, fmt, ap);
va_end(ap);
return -1;
}
void
verifydir(char *cp)
{
struct stat stb;
if (!stat(cp, &stb)) {
if (S_ISDIR(stb.st_mode))
return;
errno = ENOTDIR;
}
run_err("%s: %s", cp, strerror(errno));
killchild(0);
}
int
okname(char *cp0)
{
int c;
char *cp;
cp = cp0;
do {
c = (int)*cp;
if (c & 0200)
goto bad;
if (!isalpha(c) && !isdigit((unsigned char)c)) {
switch (c) {
case '\'':
case '"':
case '`':
case ' ':
case '#':
goto bad;
default:
break;
}
}
} while (*++cp);
return (1);
bad: fmprintf(stderr, "%s: invalid user name\n", cp0);
return (0);
}
BUF *
allocbuf(BUF *bp, int fd, int blksize)
{
size_t size;
#ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
struct stat stb;
if (fstat(fd, &stb) == -1) {
run_err("fstat: %s", strerror(errno));
return (0);
}
size = ROUNDUP(stb.st_blksize, blksize);
if (size == 0)
size = blksize;
#else /* HAVE_STRUCT_STAT_ST_BLKSIZE */
size = blksize;
#endif /* HAVE_STRUCT_STAT_ST_BLKSIZE */
if (bp->cnt >= size)
return (bp);
bp->buf = xrecallocarray(bp->buf, bp->cnt, size, 1);
bp->cnt = size;
return (bp);
}
void
lostconn(int signo)
{
if (!iamremote)
(void)write(STDERR_FILENO, "lost connection\n", 16);
if (signo)
_exit(1);
else
exit(1);
}
void
cleanup_exit(int i)
{
if (remin > 0)
close(remin);
if (remout > 0)
close(remout);
if (remin2 > 0)
close(remin2);
if (remout2 > 0)
close(remout2);
if (do_cmd_pid > 0)
waitpid(do_cmd_pid, NULL, 0);
if (do_cmd_pid2 > 0)
waitpid(do_cmd_pid2, NULL, 0);
exit(i);
}
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