1 /* $OpenBSD: scp.c,v 1.261 2024/06/26 23:14:14 deraadt Exp $ */
2 /*
3 * scp - secure remote copy. This is basically patched BSD rcp which
4 * uses ssh to do the data transfer (instead of using rcmd).
5 *
6 * NOTE: This version should NOT be suid root. (This uses ssh to
7 * do the transfer and ssh has the necessary privileges.)
8 *
9 * 1995 Timo Rinne <tri@iki.fi>, Tatu Ylonen <ylo@cs.hut.fi>
10 *
11 * As far as I am concerned, the code I have written for this software
12 * can be used freely for any purpose. Any derived versions of this
13 * software must be clearly marked as such, and if the derived work is
14 * incompatible with the protocol description in the RFC file, it must be
15 * called by a name other than "ssh" or "Secure Shell".
16 */
17 /*
18 * Copyright (c) 1999 Theo de Raadt. All rights reserved.
19 * Copyright (c) 1999 Aaron Campbell. All rights reserved.
20 *
21 * Redistribution and use in source and binary forms, with or without
22 * modification, are permitted provided that the following conditions
23 * are met:
24 * 1. Redistributions of source code must retain the above copyright
25 * notice, this list of conditions and the following disclaimer.
26 * 2. Redistributions in binary form must reproduce the above copyright
27 * notice, this list of conditions and the following disclaimer in the
28 * documentation and/or other materials provided with the distribution.
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
31 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
32 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
33 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
34 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
35 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
36 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
37 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
38 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
39 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
40 */
41
42 /*
43 * Parts from:
44 *
45 * Copyright (c) 1983, 1990, 1992, 1993, 1995
46 * The Regents of the University of California. All rights reserved.
47 *
48 * Redistribution and use in source and binary forms, with or without
49 * modification, are permitted provided that the following conditions
50 * are met:
51 * 1. Redistributions of source code must retain the above copyright
52 * notice, this list of conditions and the following disclaimer.
53 * 2. Redistributions in binary form must reproduce the above copyright
54 * notice, this list of conditions and the following disclaimer in the
55 * documentation and/or other materials provided with the distribution.
56 * 3. Neither the name of the University nor the names of its contributors
57 * may be used to endorse or promote products derived from this software
58 * without specific prior written permission.
59 *
60 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
61 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
62 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
63 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
64 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
65 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
66 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
67 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
68 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
69 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
70 * SUCH DAMAGE.
71 *
72 */
73
74 #include "includes.h"
75
76 #include <sys/types.h>
77 #ifdef HAVE_SYS_STAT_H
78 # include <sys/stat.h>
79 #endif
80 #ifdef HAVE_POLL_H
81 #include <poll.h>
82 #else
83 # ifdef HAVE_SYS_POLL_H
84 # include <sys/poll.h>
85 # endif
86 #endif
87 #ifdef HAVE_SYS_TIME_H
88 # include <sys/time.h>
89 #endif
90 #include <sys/wait.h>
91 #include <sys/uio.h>
92
93 #include <ctype.h>
94 #include <dirent.h>
95 #include <errno.h>
96 #include <fcntl.h>
97 #ifdef HAVE_FNMATCH_H
98 #include <fnmatch.h>
99 #endif
100 #ifdef USE_SYSTEM_GLOB
101 # include <glob.h>
102 #else
103 # include "openbsd-compat/glob.h"
104 #endif
105 #ifdef HAVE_LIBGEN_H
106 #include <libgen.h>
107 #endif
108 #include <limits.h>
109 #ifdef HAVE_UTIL_H
110 # include <util.h>
111 #endif
112 #include <locale.h>
113 #include <pwd.h>
114 #include <signal.h>
115 #include <stdarg.h>
116 #ifdef HAVE_STDINT_H
117 # include <stdint.h>
118 #endif
119 #include <stdio.h>
120 #include <stdlib.h>
121 #include <string.h>
122 #include <time.h>
123 #include <unistd.h>
124 #if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H) && !defined(BROKEN_STRNVIS)
125 #include <vis.h>
126 #endif
127
128 #include "xmalloc.h"
129 #include "ssh.h"
130 #include "atomicio.h"
131 #include "pathnames.h"
132 #include "log.h"
133 #include "misc.h"
134 #include "progressmeter.h"
135 #include "utf8.h"
136 #include "sftp.h"
137
138 #include "sftp-common.h"
139 #include "sftp-client.h"
140
141 extern char *__progname;
142
143 #define COPY_BUFLEN 16384
144
145 int do_cmd(char *, char *, char *, int, int, char *, int *, int *, pid_t *);
146 int do_cmd2(char *, char *, int, char *, int, int);
147
148 /* Struct for addargs */
149 arglist args;
150 arglist remote_remote_args;
151
152 /* Bandwidth limit */
153 long long limit_kbps = 0;
154 struct bwlimit bwlimit;
155
156 /* Name of current file being transferred. */
157 char *curfile;
158
159 /* This is set to non-zero to enable verbose mode. */
160 int verbose_mode = 0;
161 LogLevel log_level = SYSLOG_LEVEL_INFO;
162
163 /* This is set to zero if the progressmeter is not desired. */
164 int showprogress = 1;
165
166 /*
167 * This is set to non-zero if remote-remote copy should be piped
168 * through this process.
169 */
170 int throughlocal = 1;
171
172 /* Non-standard port to use for the ssh connection or -1. */
173 int sshport = -1;
174
175 /* This is the program to execute for the secured connection. ("ssh" or -S) */
176 char *ssh_program = _PATH_SSH_PROGRAM;
177
178 /* This is used to store the pid of ssh_program */
179 pid_t do_cmd_pid = -1;
180 pid_t do_cmd_pid2 = -1;
181
182 /* SFTP copy parameters */
183 size_t sftp_copy_buflen;
184 size_t sftp_nrequests;
185
186 /* Needed for sftp */
187 volatile sig_atomic_t interrupted = 0;
188
189 int sftp_glob(struct sftp_conn *, const char *, int,
190 int (*)(const char *, int), glob_t *); /* proto for sftp-glob.c */
191
192 static void
killchild(int signo)193 killchild(int signo)
194 {
195 if (do_cmd_pid > 1) {
196 kill(do_cmd_pid, signo ? signo : SIGTERM);
197 (void)waitpid(do_cmd_pid, NULL, 0);
198 }
199 if (do_cmd_pid2 > 1) {
200 kill(do_cmd_pid2, signo ? signo : SIGTERM);
201 (void)waitpid(do_cmd_pid2, NULL, 0);
202 }
203
204 if (signo)
205 _exit(1);
206 exit(1);
207 }
208
209 static void
suspone(int pid,int signo)210 suspone(int pid, int signo)
211 {
212 int status;
213
214 if (pid > 1) {
215 kill(pid, signo);
216 while (waitpid(pid, &status, WUNTRACED) == -1 &&
217 errno == EINTR)
218 ;
219 }
220 }
221
222 static void
suspchild(int signo)223 suspchild(int signo)
224 {
225 int save_errno = errno;
226 suspone(do_cmd_pid, signo);
227 suspone(do_cmd_pid2, signo);
228 kill(getpid(), SIGSTOP);
229 errno = save_errno;
230 }
231
232 static int
do_local_cmd(arglist * a)233 do_local_cmd(arglist *a)
234 {
235 u_int i;
236 int status;
237 pid_t pid;
238
239 if (a->num == 0)
240 fatal("do_local_cmd: no arguments");
241
242 if (verbose_mode) {
243 fprintf(stderr, "Executing:");
244 for (i = 0; i < a->num; i++)
245 fmprintf(stderr, " %s", a->list[i]);
246 fprintf(stderr, "\n");
247 }
248 if ((pid = fork()) == -1)
249 fatal("do_local_cmd: fork: %s", strerror(errno));
250
251 if (pid == 0) {
252 execvp(a->list[0], a->list);
253 perror(a->list[0]);
254 exit(1);
255 }
256
257 do_cmd_pid = pid;
258 ssh_signal(SIGTERM, killchild);
259 ssh_signal(SIGINT, killchild);
260 ssh_signal(SIGHUP, killchild);
261
262 while (waitpid(pid, &status, 0) == -1)
263 if (errno != EINTR)
264 fatal("do_local_cmd: waitpid: %s", strerror(errno));
265
266 do_cmd_pid = -1;
267
268 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
269 return (-1);
270
271 return (0);
272 }
273
274 /*
275 * This function executes the given command as the specified user on the
276 * given host. This returns < 0 if execution fails, and >= 0 otherwise. This
277 * assigns the input and output file descriptors on success.
278 */
279
280 int
do_cmd(char * program,char * host,char * remuser,int port,int subsystem,char * cmd,int * fdin,int * fdout,pid_t * pid)281 do_cmd(char *program, char *host, char *remuser, int port, int subsystem,
282 char *cmd, int *fdin, int *fdout, pid_t *pid)
283 {
284 #ifdef USE_PIPES
285 int pin[2], pout[2];
286 #else
287 int sv[2];
288 #endif
289
290 if (verbose_mode)
291 fmprintf(stderr,
292 "Executing: program %s host %s, user %s, command %s\n",
293 program, host,
294 remuser ? remuser : "(unspecified)", cmd);
295
296 if (port == -1)
297 port = sshport;
298
299 #ifdef USE_PIPES
300 if (pipe(pin) == -1 || pipe(pout) == -1)
301 fatal("pipe: %s", strerror(errno));
302 #else
303 /* Create a socket pair for communicating with ssh. */
304 if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv) == -1)
305 fatal("socketpair: %s", strerror(errno));
306 #endif
307
308 ssh_signal(SIGTSTP, suspchild);
309 ssh_signal(SIGTTIN, suspchild);
310 ssh_signal(SIGTTOU, suspchild);
311
312 /* Fork a child to execute the command on the remote host using ssh. */
313 *pid = fork();
314 switch (*pid) {
315 case -1:
316 fatal("fork: %s", strerror(errno));
317 case 0:
318 /* Child. */
319 #ifdef USE_PIPES
320 if (dup2(pin[0], STDIN_FILENO) == -1 ||
321 dup2(pout[1], STDOUT_FILENO) == -1) {
322 error("dup2: %s", strerror(errno));
323 _exit(1);
324 }
325 close(pin[0]);
326 close(pin[1]);
327 close(pout[0]);
328 close(pout[1]);
329 #else
330 if (dup2(sv[0], STDIN_FILENO) == -1 ||
331 dup2(sv[0], STDOUT_FILENO) == -1) {
332 error("dup2: %s", strerror(errno));
333 _exit(1);
334 }
335 close(sv[0]);
336 close(sv[1]);
337 #endif
338 replacearg(&args, 0, "%s", program);
339 if (port != -1) {
340 addargs(&args, "-p");
341 addargs(&args, "%d", port);
342 }
343 if (remuser != NULL) {
344 addargs(&args, "-l");
345 addargs(&args, "%s", remuser);
346 }
347 if (subsystem)
348 addargs(&args, "-s");
349 addargs(&args, "--");
350 addargs(&args, "%s", host);
351 addargs(&args, "%s", cmd);
352
353 execvp(program, args.list);
354 perror(program);
355 _exit(1);
356 default:
357 /* Parent. Close the other side, and return the local side. */
358 #ifdef USE_PIPES
359 close(pin[0]);
360 close(pout[1]);
361 *fdout = pin[1];
362 *fdin = pout[0];
363 #else
364 close(sv[0]);
365 *fdin = sv[1];
366 *fdout = sv[1];
367 #endif
368 ssh_signal(SIGTERM, killchild);
369 ssh_signal(SIGINT, killchild);
370 ssh_signal(SIGHUP, killchild);
371 return 0;
372 }
373 }
374
375 /*
376 * This function executes a command similar to do_cmd(), but expects the
377 * input and output descriptors to be setup by a previous call to do_cmd().
378 * This way the input and output of two commands can be connected.
379 */
380 int
do_cmd2(char * host,char * remuser,int port,char * cmd,int fdin,int fdout)381 do_cmd2(char *host, char *remuser, int port, char *cmd,
382 int fdin, int fdout)
383 {
384 int status;
385 pid_t pid;
386
387 if (verbose_mode)
388 fmprintf(stderr,
389 "Executing: 2nd program %s host %s, user %s, command %s\n",
390 ssh_program, host,
391 remuser ? remuser : "(unspecified)", cmd);
392
393 if (port == -1)
394 port = sshport;
395
396 /* Fork a child to execute the command on the remote host using ssh. */
397 pid = fork();
398 if (pid == 0) {
399 if (dup2(fdin, 0) == -1)
400 perror("dup2");
401 if (dup2(fdout, 1) == -1)
402 perror("dup2");
403
404 replacearg(&args, 0, "%s", ssh_program);
405 if (port != -1) {
406 addargs(&args, "-p");
407 addargs(&args, "%d", port);
408 }
409 if (remuser != NULL) {
410 addargs(&args, "-l");
411 addargs(&args, "%s", remuser);
412 }
413 addargs(&args, "-oBatchMode=yes");
414 addargs(&args, "--");
415 addargs(&args, "%s", host);
416 addargs(&args, "%s", cmd);
417
418 execvp(ssh_program, args.list);
419 perror(ssh_program);
420 exit(1);
421 } else if (pid == -1) {
422 fatal("fork: %s", strerror(errno));
423 }
424 while (waitpid(pid, &status, 0) == -1)
425 if (errno != EINTR)
426 fatal("do_cmd2: waitpid: %s", strerror(errno));
427 return 0;
428 }
429
430 typedef struct {
431 size_t cnt;
432 char *buf;
433 } BUF;
434
435 BUF *allocbuf(BUF *, int, int);
436 void lostconn(int);
437 int okname(char *);
438 void run_err(const char *,...)
439 __attribute__((__format__ (printf, 1, 2)))
440 __attribute__((__nonnull__ (1)));
441 int note_err(const char *,...)
442 __attribute__((__format__ (printf, 1, 2)));
443 void verifydir(char *);
444
445 struct passwd *pwd;
446 uid_t userid;
447 int errs, remin, remout, remin2, remout2;
448 int Tflag, pflag, iamremote, iamrecursive, targetshouldbedirectory;
449
450 #define CMDNEEDS 64
451 char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
452
453 enum scp_mode_e {
454 MODE_SCP,
455 MODE_SFTP
456 };
457
458 int response(void);
459 void rsource(char *, struct stat *);
460 void sink(int, char *[], const char *);
461 void source(int, char *[]);
462 void tolocal(int, char *[], enum scp_mode_e, char *sftp_direct);
463 void toremote(int, char *[], enum scp_mode_e, char *sftp_direct);
464 void usage(void);
465
466 void source_sftp(int, char *, char *, struct sftp_conn *);
467 void sink_sftp(int, char *, const char *, struct sftp_conn *);
468 void throughlocal_sftp(struct sftp_conn *, struct sftp_conn *,
469 char *, char *);
470
471 int
main(int argc,char ** argv)472 main(int argc, char **argv)
473 {
474 int ch, fflag, tflag, status, r, n;
475 char **newargv, *argv0;
476 const char *errstr;
477 extern char *optarg;
478 extern int optind;
479 enum scp_mode_e mode = MODE_SFTP;
480 char *sftp_direct = NULL;
481 long long llv;
482
483 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
484 sanitise_stdfd();
485
486 msetlocale();
487
488 /* Copy argv, because we modify it */
489 argv0 = argv[0];
490 newargv = xcalloc(MAXIMUM(argc + 1, 1), sizeof(*newargv));
491 for (n = 0; n < argc; n++)
492 newargv[n] = xstrdup(argv[n]);
493 argv = newargv;
494
495 __progname = ssh_get_progname(argv[0]);
496
497 log_init(argv0, log_level, SYSLOG_FACILITY_USER, 2);
498
499 memset(&args, '\0', sizeof(args));
500 memset(&remote_remote_args, '\0', sizeof(remote_remote_args));
501 args.list = remote_remote_args.list = NULL;
502 addargs(&args, "%s", ssh_program);
503 addargs(&args, "-x");
504 addargs(&args, "-oPermitLocalCommand=no");
505 addargs(&args, "-oClearAllForwardings=yes");
506 addargs(&args, "-oRemoteCommand=none");
507 addargs(&args, "-oRequestTTY=no");
508
509 fflag = Tflag = tflag = 0;
510 while ((ch = getopt(argc, argv,
511 "12346ABCTdfOpqRrstvD:F:J:M:P:S:c:i:l:o:X:")) != -1) {
512 switch (ch) {
513 /* User-visible flags. */
514 case '1':
515 fatal("SSH protocol v.1 is no longer supported");
516 break;
517 case '2':
518 /* Ignored */
519 break;
520 case 'A':
521 case '4':
522 case '6':
523 case 'C':
524 addargs(&args, "-%c", ch);
525 addargs(&remote_remote_args, "-%c", ch);
526 break;
527 case 'D':
528 sftp_direct = optarg;
529 break;
530 case '3':
531 throughlocal = 1;
532 break;
533 case 'R':
534 throughlocal = 0;
535 break;
536 case 'o':
537 case 'c':
538 case 'i':
539 case 'F':
540 case 'J':
541 addargs(&remote_remote_args, "-%c", ch);
542 addargs(&remote_remote_args, "%s", optarg);
543 addargs(&args, "-%c", ch);
544 addargs(&args, "%s", optarg);
545 break;
546 case 'O':
547 mode = MODE_SCP;
548 break;
549 case 's':
550 mode = MODE_SFTP;
551 break;
552 case 'P':
553 sshport = a2port(optarg);
554 if (sshport <= 0)
555 fatal("bad port \"%s\"\n", optarg);
556 break;
557 case 'B':
558 addargs(&remote_remote_args, "-oBatchmode=yes");
559 addargs(&args, "-oBatchmode=yes");
560 break;
561 case 'l':
562 limit_kbps = strtonum(optarg, 1, 100 * 1024 * 1024,
563 &errstr);
564 if (errstr != NULL)
565 usage();
566 limit_kbps *= 1024; /* kbps */
567 bandwidth_limit_init(&bwlimit, limit_kbps, COPY_BUFLEN);
568 break;
569 case 'p':
570 pflag = 1;
571 break;
572 case 'r':
573 iamrecursive = 1;
574 break;
575 case 'S':
576 ssh_program = xstrdup(optarg);
577 break;
578 case 'v':
579 addargs(&args, "-v");
580 addargs(&remote_remote_args, "-v");
581 if (verbose_mode == 0)
582 log_level = SYSLOG_LEVEL_DEBUG1;
583 else if (log_level < SYSLOG_LEVEL_DEBUG3)
584 log_level++;
585 verbose_mode = 1;
586 break;
587 case 'q':
588 addargs(&args, "-q");
589 addargs(&remote_remote_args, "-q");
590 showprogress = 0;
591 break;
592 case 'X':
593 /* Please keep in sync with sftp.c -X */
594 if (strncmp(optarg, "buffer=", 7) == 0) {
595 r = scan_scaled(optarg + 7, &llv);
596 if (r == 0 && (llv <= 0 || llv > 256 * 1024)) {
597 r = -1;
598 errno = EINVAL;
599 }
600 if (r == -1) {
601 fatal("Invalid buffer size \"%s\": %s",
602 optarg + 7, strerror(errno));
603 }
604 sftp_copy_buflen = (size_t)llv;
605 } else if (strncmp(optarg, "nrequests=", 10) == 0) {
606 llv = strtonum(optarg + 10, 1, 256 * 1024,
607 &errstr);
608 if (errstr != NULL) {
609 fatal("Invalid number of requests "
610 "\"%s\": %s", optarg + 10, errstr);
611 }
612 sftp_nrequests = (size_t)llv;
613 } else {
614 fatal("Invalid -X option");
615 }
616 break;
617
618 /* Server options. */
619 case 'd':
620 targetshouldbedirectory = 1;
621 break;
622 case 'f': /* "from" */
623 iamremote = 1;
624 fflag = 1;
625 break;
626 case 't': /* "to" */
627 iamremote = 1;
628 tflag = 1;
629 #ifdef HAVE_CYGWIN
630 setmode(0, O_BINARY);
631 #endif
632 break;
633 case 'T':
634 Tflag = 1;
635 break;
636 default:
637 usage();
638 }
639 }
640 argc -= optind;
641 argv += optind;
642
643 log_init(argv0, log_level, SYSLOG_FACILITY_USER, 2);
644
645 /* Do this last because we want the user to be able to override it */
646 addargs(&args, "-oForwardAgent=no");
647
648 if (iamremote)
649 mode = MODE_SCP;
650
651 if ((pwd = getpwuid(userid = getuid())) == NULL)
652 fatal("unknown user %u", (u_int) userid);
653
654 if (!isatty(STDOUT_FILENO))
655 showprogress = 0;
656
657 if (pflag) {
658 /* Cannot pledge: -p allows setuid/setgid files... */
659 } else {
660 if (pledge("stdio rpath wpath cpath fattr tty proc exec",
661 NULL) == -1) {
662 perror("pledge");
663 exit(1);
664 }
665 }
666
667 remin = STDIN_FILENO;
668 remout = STDOUT_FILENO;
669
670 if (fflag) {
671 /* Follow "protocol", send data. */
672 (void) response();
673 source(argc, argv);
674 exit(errs != 0);
675 }
676 if (tflag) {
677 /* Receive data. */
678 sink(argc, argv, NULL);
679 exit(errs != 0);
680 }
681 if (argc < 2)
682 usage();
683 if (argc > 2)
684 targetshouldbedirectory = 1;
685
686 remin = remout = -1;
687 do_cmd_pid = -1;
688 /* Command to be executed on remote system using "ssh". */
689 (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
690 verbose_mode ? " -v" : "",
691 iamrecursive ? " -r" : "", pflag ? " -p" : "",
692 targetshouldbedirectory ? " -d" : "");
693
694 (void) ssh_signal(SIGPIPE, lostconn);
695
696 if (colon(argv[argc - 1])) /* Dest is remote host. */
697 toremote(argc, argv, mode, sftp_direct);
698 else {
699 if (targetshouldbedirectory)
700 verifydir(argv[argc - 1]);
701 tolocal(argc, argv, mode, sftp_direct); /* Dest is local host. */
702 }
703 /*
704 * Finally check the exit status of the ssh process, if one was forked
705 * and no error has occurred yet
706 */
707 if (do_cmd_pid != -1 && (mode == MODE_SFTP || errs == 0)) {
708 if (remin != -1)
709 (void) close(remin);
710 if (remout != -1)
711 (void) close(remout);
712 if (waitpid(do_cmd_pid, &status, 0) == -1)
713 errs = 1;
714 else {
715 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
716 errs = 1;
717 }
718 }
719 exit(errs != 0);
720 }
721
722 /* Callback from atomicio6 to update progress meter and limit bandwidth */
723 static int
scpio(void * _cnt,size_t s)724 scpio(void *_cnt, size_t s)
725 {
726 off_t *cnt = (off_t *)_cnt;
727
728 *cnt += s;
729 refresh_progress_meter(0);
730 if (limit_kbps > 0)
731 bandwidth_limit(&bwlimit, s);
732 return 0;
733 }
734
735 static int
do_times(int fd,int verb,const struct stat * sb)736 do_times(int fd, int verb, const struct stat *sb)
737 {
738 /* strlen(2^64) == 20; strlen(10^6) == 7 */
739 char buf[(20 + 7 + 2) * 2 + 2];
740
741 (void)snprintf(buf, sizeof(buf), "T%llu 0 %llu 0\n",
742 (unsigned long long) (sb->st_mtime < 0 ? 0 : sb->st_mtime),
743 (unsigned long long) (sb->st_atime < 0 ? 0 : sb->st_atime));
744 if (verb) {
745 fprintf(stderr, "File mtime %lld atime %lld\n",
746 (long long)sb->st_mtime, (long long)sb->st_atime);
747 fprintf(stderr, "Sending file timestamps: %s", buf);
748 }
749 (void) atomicio(vwrite, fd, buf, strlen(buf));
750 return (response());
751 }
752
753 static int
parse_scp_uri(const char * uri,char ** userp,char ** hostp,int * portp,char ** pathp)754 parse_scp_uri(const char *uri, char **userp, char **hostp, int *portp,
755 char **pathp)
756 {
757 int r;
758
759 r = parse_uri("scp", uri, userp, hostp, portp, pathp);
760 if (r == 0 && *pathp == NULL)
761 *pathp = xstrdup(".");
762 return r;
763 }
764
765 /* Appends a string to an array; returns 0 on success, -1 on alloc failure */
766 static int
append(char * cp,char *** ap,size_t * np)767 append(char *cp, char ***ap, size_t *np)
768 {
769 char **tmp;
770
771 if ((tmp = reallocarray(*ap, *np + 1, sizeof(*tmp))) == NULL)
772 return -1;
773 tmp[(*np)] = cp;
774 (*np)++;
775 *ap = tmp;
776 return 0;
777 }
778
779 /*
780 * Finds the start and end of the first brace pair in the pattern.
781 * returns 0 on success or -1 for invalid patterns.
782 */
783 static int
find_brace(const char * pattern,int * startp,int * endp)784 find_brace(const char *pattern, int *startp, int *endp)
785 {
786 int i;
787 int in_bracket, brace_level;
788
789 *startp = *endp = -1;
790 in_bracket = brace_level = 0;
791 for (i = 0; i < INT_MAX && *endp < 0 && pattern[i] != '\0'; i++) {
792 switch (pattern[i]) {
793 case '\\':
794 /* skip next character */
795 if (pattern[i + 1] != '\0')
796 i++;
797 break;
798 case '[':
799 in_bracket = 1;
800 break;
801 case ']':
802 in_bracket = 0;
803 break;
804 case '{':
805 if (in_bracket)
806 break;
807 if (pattern[i + 1] == '}') {
808 /* Protect a single {}, for find(1), like csh */
809 i++; /* skip */
810 break;
811 }
812 if (*startp == -1)
813 *startp = i;
814 brace_level++;
815 break;
816 case '}':
817 if (in_bracket)
818 break;
819 if (*startp < 0) {
820 /* Unbalanced brace */
821 return -1;
822 }
823 if (--brace_level <= 0)
824 *endp = i;
825 break;
826 }
827 }
828 /* unbalanced brackets/braces */
829 if (*endp < 0 && (*startp >= 0 || in_bracket))
830 return -1;
831 return 0;
832 }
833
834 /*
835 * Assembles and records a successfully-expanded pattern, returns -1 on
836 * alloc failure.
837 */
838 static int
emit_expansion(const char * pattern,int brace_start,int brace_end,int sel_start,int sel_end,char *** patternsp,size_t * npatternsp)839 emit_expansion(const char *pattern, int brace_start, int brace_end,
840 int sel_start, int sel_end, char ***patternsp, size_t *npatternsp)
841 {
842 char *cp;
843 size_t pattern_len;
844 int o = 0, tail_len;
845
846 if ((pattern_len = strlen(pattern)) == 0 || pattern_len >= INT_MAX)
847 return -1;
848
849 tail_len = strlen(pattern + brace_end + 1);
850 if ((cp = malloc(brace_start + (sel_end - sel_start) +
851 tail_len + 1)) == NULL)
852 return -1;
853
854 /* Pattern before initial brace */
855 if (brace_start > 0) {
856 memcpy(cp, pattern, brace_start);
857 o = brace_start;
858 }
859 /* Current braced selection */
860 if (sel_end - sel_start > 0) {
861 memcpy(cp + o, pattern + sel_start,
862 sel_end - sel_start);
863 o += sel_end - sel_start;
864 }
865 /* Remainder of pattern after closing brace */
866 if (tail_len > 0) {
867 memcpy(cp + o, pattern + brace_end + 1, tail_len);
868 o += tail_len;
869 }
870 cp[o] = '\0';
871 if (append(cp, patternsp, npatternsp) != 0) {
872 free(cp);
873 return -1;
874 }
875 return 0;
876 }
877
878 /*
879 * Expand the first encountered brace in pattern, appending the expanded
880 * patterns it yielded to the *patternsp array.
881 *
882 * Returns 0 on success or -1 on allocation failure.
883 *
884 * Signals whether expansion was performed via *expanded and whether
885 * pattern was invalid via *invalid.
886 */
887 static int
brace_expand_one(const char * pattern,char *** patternsp,size_t * npatternsp,int * expanded,int * invalid)888 brace_expand_one(const char *pattern, char ***patternsp, size_t *npatternsp,
889 int *expanded, int *invalid)
890 {
891 int i;
892 int in_bracket, brace_start, brace_end, brace_level;
893 int sel_start, sel_end;
894
895 *invalid = *expanded = 0;
896
897 if (find_brace(pattern, &brace_start, &brace_end) != 0) {
898 *invalid = 1;
899 return 0;
900 } else if (brace_start == -1)
901 return 0;
902
903 in_bracket = brace_level = 0;
904 for (i = sel_start = brace_start + 1; i < brace_end; i++) {
905 switch (pattern[i]) {
906 case '{':
907 if (in_bracket)
908 break;
909 brace_level++;
910 break;
911 case '}':
912 if (in_bracket)
913 break;
914 brace_level--;
915 break;
916 case '[':
917 in_bracket = 1;
918 break;
919 case ']':
920 in_bracket = 0;
921 break;
922 case '\\':
923 if (i < brace_end - 1)
924 i++; /* skip */
925 break;
926 }
927 if (pattern[i] == ',' || i == brace_end - 1) {
928 if (in_bracket || brace_level > 0)
929 continue;
930 /* End of a selection, emit an expanded pattern */
931
932 /* Adjust end index for last selection */
933 sel_end = (i == brace_end - 1) ? brace_end : i;
934 if (emit_expansion(pattern, brace_start, brace_end,
935 sel_start, sel_end, patternsp, npatternsp) != 0)
936 return -1;
937 /* move on to the next selection */
938 sel_start = i + 1;
939 continue;
940 }
941 }
942 if (in_bracket || brace_level > 0) {
943 *invalid = 1;
944 return 0;
945 }
946 /* success */
947 *expanded = 1;
948 return 0;
949 }
950
951 /* Expand braces from pattern. Returns 0 on success, -1 on failure */
952 static int
brace_expand(const char * pattern,char *** patternsp,size_t * npatternsp)953 brace_expand(const char *pattern, char ***patternsp, size_t *npatternsp)
954 {
955 char *cp, *cp2, **active = NULL, **done = NULL;
956 size_t i, nactive = 0, ndone = 0;
957 int ret = -1, invalid = 0, expanded = 0;
958
959 *patternsp = NULL;
960 *npatternsp = 0;
961
962 /* Start the worklist with the original pattern */
963 if ((cp = strdup(pattern)) == NULL)
964 return -1;
965 if (append(cp, &active, &nactive) != 0) {
966 free(cp);
967 return -1;
968 }
969 while (nactive > 0) {
970 cp = active[nactive - 1];
971 nactive--;
972 if (brace_expand_one(cp, &active, &nactive,
973 &expanded, &invalid) == -1) {
974 free(cp);
975 goto fail;
976 }
977 if (invalid)
978 fatal_f("invalid brace pattern \"%s\"", cp);
979 if (expanded) {
980 /*
981 * Current entry expanded to new entries on the
982 * active list; discard the progenitor pattern.
983 */
984 free(cp);
985 continue;
986 }
987 /*
988 * Pattern did not expand; append the finename component to
989 * the completed list
990 */
991 if ((cp2 = strrchr(cp, '/')) != NULL)
992 *cp2++ = '\0';
993 else
994 cp2 = cp;
995 if (append(xstrdup(cp2), &done, &ndone) != 0) {
996 free(cp);
997 goto fail;
998 }
999 free(cp);
1000 }
1001 /* success */
1002 *patternsp = done;
1003 *npatternsp = ndone;
1004 done = NULL;
1005 ndone = 0;
1006 ret = 0;
1007 fail:
1008 for (i = 0; i < nactive; i++)
1009 free(active[i]);
1010 free(active);
1011 for (i = 0; i < ndone; i++)
1012 free(done[i]);
1013 free(done);
1014 return ret;
1015 }
1016
1017 static struct sftp_conn *
do_sftp_connect(char * host,char * user,int port,char * sftp_direct,int * reminp,int * remoutp,int * pidp)1018 do_sftp_connect(char *host, char *user, int port, char *sftp_direct,
1019 int *reminp, int *remoutp, int *pidp)
1020 {
1021 if (sftp_direct == NULL) {
1022 if (do_cmd(ssh_program, host, user, port, 1, "sftp",
1023 reminp, remoutp, pidp) < 0)
1024 return NULL;
1025
1026 } else {
1027 freeargs(&args);
1028 addargs(&args, "sftp-server");
1029 if (do_cmd(sftp_direct, host, NULL, -1, 0, "sftp",
1030 reminp, remoutp, pidp) < 0)
1031 return NULL;
1032 }
1033 return sftp_init(*reminp, *remoutp,
1034 sftp_copy_buflen, sftp_nrequests, limit_kbps);
1035 }
1036
1037 void
toremote(int argc,char ** argv,enum scp_mode_e mode,char * sftp_direct)1038 toremote(int argc, char **argv, enum scp_mode_e mode, char *sftp_direct)
1039 {
1040 char *suser = NULL, *host = NULL, *src = NULL;
1041 char *bp, *tuser, *thost, *targ;
1042 int sport = -1, tport = -1;
1043 struct sftp_conn *conn = NULL, *conn2 = NULL;
1044 arglist alist;
1045 int i, r, status;
1046 struct stat sb;
1047 u_int j;
1048
1049 memset(&alist, '\0', sizeof(alist));
1050 alist.list = NULL;
1051
1052 /* Parse target */
1053 r = parse_scp_uri(argv[argc - 1], &tuser, &thost, &tport, &targ);
1054 if (r == -1) {
1055 fmprintf(stderr, "%s: invalid uri\n", argv[argc - 1]);
1056 ++errs;
1057 goto out;
1058 }
1059 if (r != 0) {
1060 if (parse_user_host_path(argv[argc - 1], &tuser, &thost,
1061 &targ) == -1) {
1062 fmprintf(stderr, "%s: invalid target\n", argv[argc - 1]);
1063 ++errs;
1064 goto out;
1065 }
1066 }
1067
1068 /* Parse source files */
1069 for (i = 0; i < argc - 1; i++) {
1070 free(suser);
1071 free(host);
1072 free(src);
1073 r = parse_scp_uri(argv[i], &suser, &host, &sport, &src);
1074 if (r == -1) {
1075 fmprintf(stderr, "%s: invalid uri\n", argv[i]);
1076 ++errs;
1077 continue;
1078 }
1079 if (r != 0) {
1080 parse_user_host_path(argv[i], &suser, &host, &src);
1081 }
1082 if (suser != NULL && !okname(suser)) {
1083 ++errs;
1084 continue;
1085 }
1086 if (host && throughlocal) { /* extended remote to remote */
1087 if (mode == MODE_SFTP) {
1088 if (remin == -1) {
1089 /* Connect to dest now */
1090 conn = do_sftp_connect(thost, tuser,
1091 tport, sftp_direct,
1092 &remin, &remout, &do_cmd_pid);
1093 if (conn == NULL) {
1094 fatal("Unable to open "
1095 "destination connection");
1096 }
1097 debug3_f("origin in %d out %d pid %ld",
1098 remin, remout, (long)do_cmd_pid);
1099 }
1100 /*
1101 * XXX remember suser/host/sport and only
1102 * reconnect if they change between arguments.
1103 * would save reconnections for cases like
1104 * scp -3 hosta:/foo hosta:/bar hostb:
1105 */
1106 /* Connect to origin now */
1107 conn2 = do_sftp_connect(host, suser,
1108 sport, sftp_direct,
1109 &remin2, &remout2, &do_cmd_pid2);
1110 if (conn2 == NULL) {
1111 fatal("Unable to open "
1112 "source connection");
1113 }
1114 debug3_f("destination in %d out %d pid %ld",
1115 remin2, remout2, (long)do_cmd_pid2);
1116 throughlocal_sftp(conn2, conn, src, targ);
1117 (void) close(remin2);
1118 (void) close(remout2);
1119 remin2 = remout2 = -1;
1120 if (waitpid(do_cmd_pid2, &status, 0) == -1)
1121 ++errs;
1122 else if (!WIFEXITED(status) ||
1123 WEXITSTATUS(status) != 0)
1124 ++errs;
1125 do_cmd_pid2 = -1;
1126 continue;
1127 } else {
1128 xasprintf(&bp, "%s -f %s%s", cmd,
1129 *src == '-' ? "-- " : "", src);
1130 if (do_cmd(ssh_program, host, suser, sport, 0,
1131 bp, &remin, &remout, &do_cmd_pid) < 0)
1132 exit(1);
1133 free(bp);
1134 xasprintf(&bp, "%s -t %s%s", cmd,
1135 *targ == '-' ? "-- " : "", targ);
1136 if (do_cmd2(thost, tuser, tport, bp,
1137 remin, remout) < 0)
1138 exit(1);
1139 free(bp);
1140 (void) close(remin);
1141 (void) close(remout);
1142 remin = remout = -1;
1143 }
1144 } else if (host) { /* standard remote to remote */
1145 /*
1146 * Second remote user is passed to first remote side
1147 * via scp command-line. Ensure it contains no obvious
1148 * shell characters.
1149 */
1150 if (tuser != NULL && !okname(tuser)) {
1151 ++errs;
1152 continue;
1153 }
1154 if (tport != -1 && tport != SSH_DEFAULT_PORT) {
1155 /* This would require the remote support URIs */
1156 fatal("target port not supported with two "
1157 "remote hosts and the -R option");
1158 }
1159
1160 freeargs(&alist);
1161 addargs(&alist, "%s", ssh_program);
1162 addargs(&alist, "-x");
1163 addargs(&alist, "-oClearAllForwardings=yes");
1164 addargs(&alist, "-n");
1165 for (j = 0; j < remote_remote_args.num; j++) {
1166 addargs(&alist, "%s",
1167 remote_remote_args.list[j]);
1168 }
1169
1170 if (sport != -1) {
1171 addargs(&alist, "-p");
1172 addargs(&alist, "%d", sport);
1173 }
1174 if (suser) {
1175 addargs(&alist, "-l");
1176 addargs(&alist, "%s", suser);
1177 }
1178 addargs(&alist, "--");
1179 addargs(&alist, "%s", host);
1180 addargs(&alist, "%s", cmd);
1181 addargs(&alist, "%s", src);
1182 addargs(&alist, "%s%s%s:%s",
1183 tuser ? tuser : "", tuser ? "@" : "",
1184 thost, targ);
1185 if (do_local_cmd(&alist) != 0)
1186 errs = 1;
1187 } else { /* local to remote */
1188 if (mode == MODE_SFTP) {
1189 /* no need to glob: already done by shell */
1190 if (stat(argv[i], &sb) != 0) {
1191 fatal("stat local \"%s\": %s", argv[i],
1192 strerror(errno));
1193 }
1194 if (remin == -1) {
1195 /* Connect to remote now */
1196 conn = do_sftp_connect(thost, tuser,
1197 tport, sftp_direct,
1198 &remin, &remout, &do_cmd_pid);
1199 if (conn == NULL) {
1200 fatal("Unable to open sftp "
1201 "connection");
1202 }
1203 }
1204
1205 /* The protocol */
1206 source_sftp(1, argv[i], targ, conn);
1207 continue;
1208 }
1209 /* SCP */
1210 if (remin == -1) {
1211 xasprintf(&bp, "%s -t %s%s", cmd,
1212 *targ == '-' ? "-- " : "", targ);
1213 if (do_cmd(ssh_program, thost, tuser, tport, 0,
1214 bp, &remin, &remout, &do_cmd_pid) < 0)
1215 exit(1);
1216 if (response() < 0)
1217 exit(1);
1218 free(bp);
1219 }
1220 source(1, argv + i);
1221 }
1222 }
1223 out:
1224 if (mode == MODE_SFTP)
1225 free(conn);
1226 free(tuser);
1227 free(thost);
1228 free(targ);
1229 free(suser);
1230 free(host);
1231 free(src);
1232 }
1233
1234 void
tolocal(int argc,char ** argv,enum scp_mode_e mode,char * sftp_direct)1235 tolocal(int argc, char **argv, enum scp_mode_e mode, char *sftp_direct)
1236 {
1237 char *bp, *host = NULL, *src = NULL, *suser = NULL;
1238 arglist alist;
1239 struct sftp_conn *conn = NULL;
1240 int i, r, sport = -1;
1241
1242 memset(&alist, '\0', sizeof(alist));
1243 alist.list = NULL;
1244
1245 for (i = 0; i < argc - 1; i++) {
1246 free(suser);
1247 free(host);
1248 free(src);
1249 r = parse_scp_uri(argv[i], &suser, &host, &sport, &src);
1250 if (r == -1) {
1251 fmprintf(stderr, "%s: invalid uri\n", argv[i]);
1252 ++errs;
1253 continue;
1254 }
1255 if (r != 0)
1256 parse_user_host_path(argv[i], &suser, &host, &src);
1257 if (suser != NULL && !okname(suser)) {
1258 ++errs;
1259 continue;
1260 }
1261 if (!host) { /* Local to local. */
1262 freeargs(&alist);
1263 addargs(&alist, "%s", _PATH_CP);
1264 if (iamrecursive)
1265 addargs(&alist, "-r");
1266 if (pflag)
1267 addargs(&alist, "-p");
1268 addargs(&alist, "--");
1269 addargs(&alist, "%s", argv[i]);
1270 addargs(&alist, "%s", argv[argc-1]);
1271 if (do_local_cmd(&alist))
1272 ++errs;
1273 continue;
1274 }
1275 /* Remote to local. */
1276 if (mode == MODE_SFTP) {
1277 conn = do_sftp_connect(host, suser, sport,
1278 sftp_direct, &remin, &remout, &do_cmd_pid);
1279 if (conn == NULL) {
1280 error("sftp connection failed");
1281 ++errs;
1282 continue;
1283 }
1284
1285 /* The protocol */
1286 sink_sftp(1, argv[argc - 1], src, conn);
1287
1288 free(conn);
1289 (void) close(remin);
1290 (void) close(remout);
1291 remin = remout = -1;
1292 continue;
1293 }
1294 /* SCP */
1295 xasprintf(&bp, "%s -f %s%s",
1296 cmd, *src == '-' ? "-- " : "", src);
1297 if (do_cmd(ssh_program, host, suser, sport, 0, bp,
1298 &remin, &remout, &do_cmd_pid) < 0) {
1299 free(bp);
1300 ++errs;
1301 continue;
1302 }
1303 free(bp);
1304 sink(1, argv + argc - 1, src);
1305 (void) close(remin);
1306 remin = remout = -1;
1307 }
1308 free(suser);
1309 free(host);
1310 free(src);
1311 }
1312
1313 /* Prepare remote path, handling ~ by assuming cwd is the homedir */
1314 static char *
prepare_remote_path(struct sftp_conn * conn,const char * path)1315 prepare_remote_path(struct sftp_conn *conn, const char *path)
1316 {
1317 size_t nslash;
1318
1319 /* Handle ~ prefixed paths */
1320 if (*path == '\0' || strcmp(path, "~") == 0)
1321 return xstrdup(".");
1322 if (*path != '~')
1323 return xstrdup(path);
1324 if (strncmp(path, "~/", 2) == 0) {
1325 if ((nslash = strspn(path + 2, "/")) == strlen(path + 2))
1326 return xstrdup(".");
1327 return xstrdup(path + 2 + nslash);
1328 }
1329 if (sftp_can_expand_path(conn))
1330 return sftp_expand_path(conn, path);
1331 /* No protocol extension */
1332 error("server expand-path extension is required "
1333 "for ~user paths in SFTP mode");
1334 return NULL;
1335 }
1336
1337 void
source_sftp(int argc,char * src,char * targ,struct sftp_conn * conn)1338 source_sftp(int argc, char *src, char *targ, struct sftp_conn *conn)
1339 {
1340 char *target = NULL, *filename = NULL, *abs_dst = NULL;
1341 int src_is_dir, target_is_dir;
1342 Attrib a;
1343 struct stat st;
1344
1345 memset(&a, '\0', sizeof(a));
1346 if (stat(src, &st) != 0)
1347 fatal("stat local \"%s\": %s", src, strerror(errno));
1348 src_is_dir = S_ISDIR(st.st_mode);
1349 if ((filename = basename(src)) == NULL)
1350 fatal("basename \"%s\": %s", src, strerror(errno));
1351
1352 /*
1353 * No need to glob here - the local shell already took care of
1354 * the expansions
1355 */
1356 if ((target = prepare_remote_path(conn, targ)) == NULL)
1357 cleanup_exit(255);
1358 target_is_dir = sftp_remote_is_dir(conn, target);
1359 if (targetshouldbedirectory && !target_is_dir) {
1360 debug("target directory \"%s\" does not exist", target);
1361 a.flags = SSH2_FILEXFER_ATTR_PERMISSIONS;
1362 a.perm = st.st_mode | 0700; /* ensure writable */
1363 if (sftp_mkdir(conn, target, &a, 1) != 0)
1364 cleanup_exit(255); /* error already logged */
1365 target_is_dir = 1;
1366 }
1367 if (target_is_dir)
1368 abs_dst = sftp_path_append(target, filename);
1369 else {
1370 abs_dst = target;
1371 target = NULL;
1372 }
1373 debug3_f("copying local %s to remote %s", src, abs_dst);
1374
1375 if (src_is_dir && iamrecursive) {
1376 if (sftp_upload_dir(conn, src, abs_dst, pflag,
1377 SFTP_PROGRESS_ONLY, 0, 0, 1, 1) != 0) {
1378 error("failed to upload directory %s to %s", src, targ);
1379 errs = 1;
1380 }
1381 } else if (sftp_upload(conn, src, abs_dst, pflag, 0, 0, 1) != 0) {
1382 error("failed to upload file %s to %s", src, targ);
1383 errs = 1;
1384 }
1385
1386 free(abs_dst);
1387 free(target);
1388 }
1389
1390 void
source(int argc,char ** argv)1391 source(int argc, char **argv)
1392 {
1393 struct stat stb;
1394 static BUF buffer;
1395 BUF *bp;
1396 off_t i, statbytes;
1397 size_t amt, nr;
1398 int fd = -1, haderr, indx;
1399 char *last, *name, buf[PATH_MAX + 128], encname[PATH_MAX];
1400 int len;
1401
1402 for (indx = 0; indx < argc; ++indx) {
1403 name = argv[indx];
1404 statbytes = 0;
1405 len = strlen(name);
1406 while (len > 1 && name[len-1] == '/')
1407 name[--len] = '\0';
1408 if ((fd = open(name, O_RDONLY|O_NONBLOCK)) == -1)
1409 goto syserr;
1410 if (strchr(name, '\n') != NULL) {
1411 strnvis(encname, name, sizeof(encname), VIS_NL);
1412 name = encname;
1413 }
1414 if (fstat(fd, &stb) == -1) {
1415 syserr: run_err("%s: %s", name, strerror(errno));
1416 goto next;
1417 }
1418 if (stb.st_size < 0) {
1419 run_err("%s: %s", name, "Negative file size");
1420 goto next;
1421 }
1422 unset_nonblock(fd);
1423 switch (stb.st_mode & S_IFMT) {
1424 case S_IFREG:
1425 break;
1426 case S_IFDIR:
1427 if (iamrecursive) {
1428 rsource(name, &stb);
1429 goto next;
1430 }
1431 /* FALLTHROUGH */
1432 default:
1433 run_err("%s: not a regular file", name);
1434 goto next;
1435 }
1436 if ((last = strrchr(name, '/')) == NULL)
1437 last = name;
1438 else
1439 ++last;
1440 curfile = last;
1441 if (pflag) {
1442 if (do_times(remout, verbose_mode, &stb) < 0)
1443 goto next;
1444 }
1445 #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
1446 snprintf(buf, sizeof buf, "C%04o %lld %s\n",
1447 (u_int) (stb.st_mode & FILEMODEMASK),
1448 (long long)stb.st_size, last);
1449 if (verbose_mode)
1450 fmprintf(stderr, "Sending file modes: %s", buf);
1451 (void) atomicio(vwrite, remout, buf, strlen(buf));
1452 if (response() < 0)
1453 goto next;
1454 if ((bp = allocbuf(&buffer, fd, COPY_BUFLEN)) == NULL) {
1455 next: if (fd != -1) {
1456 (void) close(fd);
1457 fd = -1;
1458 }
1459 continue;
1460 }
1461 if (showprogress)
1462 start_progress_meter(curfile, stb.st_size, &statbytes);
1463 set_nonblock(remout);
1464 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
1465 amt = bp->cnt;
1466 if (i + (off_t)amt > stb.st_size)
1467 amt = stb.st_size - i;
1468 if (!haderr) {
1469 if ((nr = atomicio(read, fd,
1470 bp->buf, amt)) != amt) {
1471 haderr = errno;
1472 memset(bp->buf + nr, 0, amt - nr);
1473 }
1474 }
1475 /* Keep writing after error to retain sync */
1476 if (haderr) {
1477 (void)atomicio(vwrite, remout, bp->buf, amt);
1478 memset(bp->buf, 0, amt);
1479 continue;
1480 }
1481 if (atomicio6(vwrite, remout, bp->buf, amt, scpio,
1482 &statbytes) != amt)
1483 haderr = errno;
1484 }
1485 unset_nonblock(remout);
1486
1487 if (fd != -1) {
1488 if (close(fd) == -1 && !haderr)
1489 haderr = errno;
1490 fd = -1;
1491 }
1492 if (!haderr)
1493 (void) atomicio(vwrite, remout, "", 1);
1494 else
1495 run_err("%s: %s", name, strerror(haderr));
1496 (void) response();
1497 if (showprogress)
1498 stop_progress_meter();
1499 }
1500 }
1501
1502 void
rsource(char * name,struct stat * statp)1503 rsource(char *name, struct stat *statp)
1504 {
1505 DIR *dirp;
1506 struct dirent *dp;
1507 char *last, *vect[1], path[PATH_MAX];
1508
1509 if (!(dirp = opendir(name))) {
1510 run_err("%s: %s", name, strerror(errno));
1511 return;
1512 }
1513 last = strrchr(name, '/');
1514 if (last == NULL)
1515 last = name;
1516 else
1517 last++;
1518 if (pflag) {
1519 if (do_times(remout, verbose_mode, statp) < 0) {
1520 closedir(dirp);
1521 return;
1522 }
1523 }
1524 (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n",
1525 (u_int) (statp->st_mode & FILEMODEMASK), 0, last);
1526 if (verbose_mode)
1527 fmprintf(stderr, "Entering directory: %s", path);
1528 (void) atomicio(vwrite, remout, path, strlen(path));
1529 if (response() < 0) {
1530 closedir(dirp);
1531 return;
1532 }
1533 while ((dp = readdir(dirp)) != NULL) {
1534 if (dp->d_ino == 0)
1535 continue;
1536 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
1537 continue;
1538 if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) {
1539 run_err("%s/%s: name too long", name, dp->d_name);
1540 continue;
1541 }
1542 (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name);
1543 vect[0] = path;
1544 source(1, vect);
1545 }
1546 (void) closedir(dirp);
1547 (void) atomicio(vwrite, remout, "E\n", 2);
1548 (void) response();
1549 }
1550
1551 void
sink_sftp(int argc,char * dst,const char * src,struct sftp_conn * conn)1552 sink_sftp(int argc, char *dst, const char *src, struct sftp_conn *conn)
1553 {
1554 char *abs_src = NULL;
1555 char *abs_dst = NULL;
1556 glob_t g;
1557 char *filename, *tmp = NULL;
1558 int i, r, err = 0, dst_is_dir;
1559 struct stat st;
1560
1561 memset(&g, 0, sizeof(g));
1562
1563 /*
1564 * Here, we need remote glob as SFTP can not depend on remote shell
1565 * expansions
1566 */
1567 if ((abs_src = prepare_remote_path(conn, src)) == NULL) {
1568 err = -1;
1569 goto out;
1570 }
1571
1572 debug3_f("copying remote %s to local %s", abs_src, dst);
1573 if ((r = sftp_glob(conn, abs_src, GLOB_NOCHECK|GLOB_MARK,
1574 NULL, &g)) != 0) {
1575 if (r == GLOB_NOSPACE)
1576 error("%s: too many glob matches", src);
1577 else
1578 error("%s: %s", src, strerror(ENOENT));
1579 err = -1;
1580 goto out;
1581 }
1582
1583 /* Did we actually get any matches back from the glob? */
1584 if (g.gl_matchc == 0 && g.gl_pathc == 1 && g.gl_pathv[0] != 0) {
1585 /*
1586 * If nothing matched but a path returned, then it's probably
1587 * a GLOB_NOCHECK result. Check whether the unglobbed path
1588 * exists so we can give a nice error message early.
1589 */
1590 if (sftp_stat(conn, g.gl_pathv[0], 1, NULL) != 0) {
1591 error("%s: %s", src, strerror(ENOENT));
1592 err = -1;
1593 goto out;
1594 }
1595 }
1596
1597 if ((r = stat(dst, &st)) != 0)
1598 debug2_f("stat local \"%s\": %s", dst, strerror(errno));
1599 dst_is_dir = r == 0 && S_ISDIR(st.st_mode);
1600
1601 if (g.gl_matchc > 1 && !dst_is_dir) {
1602 if (r == 0) {
1603 error("Multiple files match pattern, but destination "
1604 "\"%s\" is not a directory", dst);
1605 err = -1;
1606 goto out;
1607 }
1608 debug2_f("creating destination \"%s\"", dst);
1609 if (mkdir(dst, 0777) != 0) {
1610 error("local mkdir \"%s\": %s", dst, strerror(errno));
1611 err = -1;
1612 goto out;
1613 }
1614 dst_is_dir = 1;
1615 }
1616
1617 for (i = 0; g.gl_pathv[i] && !interrupted; i++) {
1618 tmp = xstrdup(g.gl_pathv[i]);
1619 if ((filename = basename(tmp)) == NULL) {
1620 error("basename %s: %s", tmp, strerror(errno));
1621 err = -1;
1622 goto out;
1623 }
1624
1625 if (dst_is_dir)
1626 abs_dst = sftp_path_append(dst, filename);
1627 else
1628 abs_dst = xstrdup(dst);
1629
1630 debug("Fetching %s to %s\n", g.gl_pathv[i], abs_dst);
1631 if (sftp_globpath_is_dir(g.gl_pathv[i]) && iamrecursive) {
1632 if (sftp_download_dir(conn, g.gl_pathv[i], abs_dst,
1633 NULL, pflag, SFTP_PROGRESS_ONLY, 0, 0, 1, 1) == -1)
1634 err = -1;
1635 } else {
1636 if (sftp_download(conn, g.gl_pathv[i], abs_dst, NULL,
1637 pflag, 0, 0, 1) == -1)
1638 err = -1;
1639 }
1640 free(abs_dst);
1641 abs_dst = NULL;
1642 free(tmp);
1643 tmp = NULL;
1644 }
1645
1646 out:
1647 free(abs_src);
1648 free(tmp);
1649 globfree(&g);
1650 if (err == -1)
1651 errs = 1;
1652 }
1653
1654
1655 #define TYPE_OVERFLOW(type, val) \
1656 ((sizeof(type) == 4 && (val) > INT32_MAX) || \
1657 (sizeof(type) == 8 && (val) > INT64_MAX) || \
1658 (sizeof(type) != 4 && sizeof(type) != 8))
1659
1660 void
sink(int argc,char ** argv,const char * src)1661 sink(int argc, char **argv, const char *src)
1662 {
1663 static BUF buffer;
1664 struct stat stb;
1665 BUF *bp;
1666 off_t i;
1667 size_t j, count;
1668 int amt, exists, first, ofd;
1669 mode_t mode, omode, mask;
1670 off_t size, statbytes;
1671 unsigned long long ull;
1672 int setimes, targisdir, wrerr;
1673 char ch, *cp, *np, *targ, *why, *vect[1], buf[2048], visbuf[2048];
1674 char **patterns = NULL;
1675 size_t n, npatterns = 0;
1676 struct timeval tv[2];
1677
1678 #define atime tv[0]
1679 #define mtime tv[1]
1680 #define SCREWUP(str) { why = str; goto screwup; }
1681
1682 if (TYPE_OVERFLOW(time_t, 0) || TYPE_OVERFLOW(off_t, 0))
1683 SCREWUP("Unexpected off_t/time_t size");
1684
1685 setimes = targisdir = 0;
1686 mask = umask(0);
1687 if (!pflag)
1688 (void) umask(mask);
1689 if (argc != 1) {
1690 run_err("ambiguous target");
1691 exit(1);
1692 }
1693 targ = *argv;
1694 if (targetshouldbedirectory)
1695 verifydir(targ);
1696
1697 (void) atomicio(vwrite, remout, "", 1);
1698 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
1699 targisdir = 1;
1700 if (src != NULL && !iamrecursive && !Tflag) {
1701 /*
1702 * Prepare to try to restrict incoming filenames to match
1703 * the requested destination file glob.
1704 */
1705 if (brace_expand(src, &patterns, &npatterns) != 0)
1706 fatal_f("could not expand pattern");
1707 }
1708 for (first = 1;; first = 0) {
1709 cp = buf;
1710 if (atomicio(read, remin, cp, 1) != 1)
1711 goto done;
1712 if (*cp++ == '\n')
1713 SCREWUP("unexpected <newline>");
1714 do {
1715 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1716 SCREWUP("lost connection");
1717 *cp++ = ch;
1718 } while (cp < &buf[sizeof(buf) - 1] && ch != '\n');
1719 *cp = 0;
1720 if (verbose_mode)
1721 fmprintf(stderr, "Sink: %s", buf);
1722
1723 if (buf[0] == '\01' || buf[0] == '\02') {
1724 if (iamremote == 0) {
1725 (void) snmprintf(visbuf, sizeof(visbuf),
1726 NULL, "%s", buf + 1);
1727 (void) atomicio(vwrite, STDERR_FILENO,
1728 visbuf, strlen(visbuf));
1729 }
1730 if (buf[0] == '\02')
1731 exit(1);
1732 ++errs;
1733 continue;
1734 }
1735 if (buf[0] == 'E') {
1736 (void) atomicio(vwrite, remout, "", 1);
1737 goto done;
1738 }
1739 if (ch == '\n')
1740 *--cp = 0;
1741
1742 cp = buf;
1743 if (*cp == 'T') {
1744 setimes++;
1745 cp++;
1746 if (!isdigit((unsigned char)*cp))
1747 SCREWUP("mtime.sec not present");
1748 ull = strtoull(cp, &cp, 10);
1749 if (!cp || *cp++ != ' ')
1750 SCREWUP("mtime.sec not delimited");
1751 if (TYPE_OVERFLOW(time_t, ull))
1752 setimes = 0; /* out of range */
1753 mtime.tv_sec = ull;
1754 mtime.tv_usec = strtol(cp, &cp, 10);
1755 if (!cp || *cp++ != ' ' || mtime.tv_usec < 0 ||
1756 mtime.tv_usec > 999999)
1757 SCREWUP("mtime.usec not delimited");
1758 if (!isdigit((unsigned char)*cp))
1759 SCREWUP("atime.sec not present");
1760 ull = strtoull(cp, &cp, 10);
1761 if (!cp || *cp++ != ' ')
1762 SCREWUP("atime.sec not delimited");
1763 if (TYPE_OVERFLOW(time_t, ull))
1764 setimes = 0; /* out of range */
1765 atime.tv_sec = ull;
1766 atime.tv_usec = strtol(cp, &cp, 10);
1767 if (!cp || *cp++ != '\0' || atime.tv_usec < 0 ||
1768 atime.tv_usec > 999999)
1769 SCREWUP("atime.usec not delimited");
1770 (void) atomicio(vwrite, remout, "", 1);
1771 continue;
1772 }
1773 if (*cp != 'C' && *cp != 'D') {
1774 /*
1775 * Check for the case "rcp remote:foo\* local:bar".
1776 * In this case, the line "No match." can be returned
1777 * by the shell before the rcp command on the remote is
1778 * executed so the ^Aerror_message convention isn't
1779 * followed.
1780 */
1781 if (first) {
1782 run_err("%s", cp);
1783 exit(1);
1784 }
1785 SCREWUP("expected control record");
1786 }
1787 mode = 0;
1788 for (++cp; cp < buf + 5; cp++) {
1789 if (*cp < '0' || *cp > '7')
1790 SCREWUP("bad mode");
1791 mode = (mode << 3) | (*cp - '0');
1792 }
1793 if (!pflag)
1794 mode &= ~mask;
1795 if (*cp++ != ' ')
1796 SCREWUP("mode not delimited");
1797
1798 if (!isdigit((unsigned char)*cp))
1799 SCREWUP("size not present");
1800 ull = strtoull(cp, &cp, 10);
1801 if (!cp || *cp++ != ' ')
1802 SCREWUP("size not delimited");
1803 if (TYPE_OVERFLOW(off_t, ull))
1804 SCREWUP("size out of range");
1805 size = (off_t)ull;
1806
1807 if (*cp == '\0' || strchr(cp, '/') != NULL ||
1808 strcmp(cp, ".") == 0 || strcmp(cp, "..") == 0) {
1809 run_err("error: unexpected filename: %s", cp);
1810 exit(1);
1811 }
1812 if (npatterns > 0) {
1813 for (n = 0; n < npatterns; n++) {
1814 if (strcmp(patterns[n], cp) == 0 ||
1815 fnmatch(patterns[n], cp, 0) == 0)
1816 break;
1817 }
1818 if (n >= npatterns) {
1819 debug2_f("incoming filename \"%s\" does not "
1820 "match any of %zu expected patterns", cp,
1821 npatterns);
1822 for (n = 0; n < npatterns; n++) {
1823 debug3_f("expected pattern %zu: \"%s\"",
1824 n, patterns[n]);
1825 }
1826 SCREWUP("filename does not match request");
1827 }
1828 }
1829 if (targisdir) {
1830 static char *namebuf;
1831 static size_t cursize;
1832 size_t need;
1833
1834 need = strlen(targ) + strlen(cp) + 250;
1835 if (need > cursize) {
1836 free(namebuf);
1837 namebuf = xmalloc(need);
1838 cursize = need;
1839 }
1840 (void) snprintf(namebuf, need, "%s%s%s", targ,
1841 strcmp(targ, "/") ? "/" : "", cp);
1842 np = namebuf;
1843 } else
1844 np = targ;
1845 curfile = cp;
1846 exists = stat(np, &stb) == 0;
1847 if (buf[0] == 'D') {
1848 int mod_flag = pflag;
1849 if (!iamrecursive)
1850 SCREWUP("received directory without -r");
1851 if (exists) {
1852 if (!S_ISDIR(stb.st_mode)) {
1853 errno = ENOTDIR;
1854 goto bad;
1855 }
1856 if (pflag)
1857 (void) chmod(np, mode);
1858 } else {
1859 /* Handle copying from a read-only directory */
1860 mod_flag = 1;
1861 if (mkdir(np, mode | S_IRWXU) == -1)
1862 goto bad;
1863 }
1864 vect[0] = xstrdup(np);
1865 sink(1, vect, src);
1866 if (setimes) {
1867 setimes = 0;
1868 (void) utimes(vect[0], tv);
1869 }
1870 if (mod_flag)
1871 (void) chmod(vect[0], mode);
1872 free(vect[0]);
1873 continue;
1874 }
1875 omode = mode;
1876 mode |= S_IWUSR;
1877 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) == -1) {
1878 bad: run_err("%s: %s", np, strerror(errno));
1879 continue;
1880 }
1881 (void) atomicio(vwrite, remout, "", 1);
1882 if ((bp = allocbuf(&buffer, ofd, COPY_BUFLEN)) == NULL) {
1883 (void) close(ofd);
1884 continue;
1885 }
1886 cp = bp->buf;
1887 wrerr = 0;
1888
1889 /*
1890 * NB. do not use run_err() unless immediately followed by
1891 * exit() below as it may send a spurious reply that might
1892 * desyncronise us from the peer. Use note_err() instead.
1893 */
1894 statbytes = 0;
1895 if (showprogress)
1896 start_progress_meter(curfile, size, &statbytes);
1897 set_nonblock(remin);
1898 for (count = i = 0; i < size; i += bp->cnt) {
1899 amt = bp->cnt;
1900 if (i + amt > size)
1901 amt = size - i;
1902 count += amt;
1903 do {
1904 j = atomicio6(read, remin, cp, amt,
1905 scpio, &statbytes);
1906 if (j == 0) {
1907 run_err("%s", j != EPIPE ?
1908 strerror(errno) :
1909 "dropped connection");
1910 exit(1);
1911 }
1912 amt -= j;
1913 cp += j;
1914 } while (amt > 0);
1915
1916 if (count == bp->cnt) {
1917 /* Keep reading so we stay sync'd up. */
1918 if (!wrerr) {
1919 if (atomicio(vwrite, ofd, bp->buf,
1920 count) != count) {
1921 note_err("%s: %s", np,
1922 strerror(errno));
1923 wrerr = 1;
1924 }
1925 }
1926 count = 0;
1927 cp = bp->buf;
1928 }
1929 }
1930 unset_nonblock(remin);
1931 if (count != 0 && !wrerr &&
1932 atomicio(vwrite, ofd, bp->buf, count) != count) {
1933 note_err("%s: %s", np, strerror(errno));
1934 wrerr = 1;
1935 }
1936 if (!wrerr && (!exists || S_ISREG(stb.st_mode)) &&
1937 ftruncate(ofd, size) != 0)
1938 note_err("%s: truncate: %s", np, strerror(errno));
1939 if (pflag) {
1940 if (exists || omode != mode)
1941 #ifdef HAVE_FCHMOD
1942 if (fchmod(ofd, omode)) {
1943 #else /* HAVE_FCHMOD */
1944 if (chmod(np, omode)) {
1945 #endif /* HAVE_FCHMOD */
1946 note_err("%s: set mode: %s",
1947 np, strerror(errno));
1948 }
1949 } else {
1950 if (!exists && omode != mode)
1951 #ifdef HAVE_FCHMOD
1952 if (fchmod(ofd, omode & ~mask)) {
1953 #else /* HAVE_FCHMOD */
1954 if (chmod(np, omode & ~mask)) {
1955 #endif /* HAVE_FCHMOD */
1956 note_err("%s: set mode: %s",
1957 np, strerror(errno));
1958 }
1959 }
1960 if (close(ofd) == -1)
1961 note_err("%s: close: %s", np, strerror(errno));
1962 (void) response();
1963 if (showprogress)
1964 stop_progress_meter();
1965 if (setimes && !wrerr) {
1966 setimes = 0;
1967 if (utimes(np, tv) == -1) {
1968 note_err("%s: set times: %s",
1969 np, strerror(errno));
1970 }
1971 }
1972 /* If no error was noted then signal success for this file */
1973 if (note_err(NULL) == 0)
1974 (void) atomicio(vwrite, remout, "", 1);
1975 }
1976 done:
1977 for (n = 0; n < npatterns; n++)
1978 free(patterns[n]);
1979 free(patterns);
1980 return;
1981 screwup:
1982 for (n = 0; n < npatterns; n++)
1983 free(patterns[n]);
1984 free(patterns);
1985 run_err("protocol error: %s", why);
1986 exit(1);
1987 }
1988
1989 void
1990 throughlocal_sftp(struct sftp_conn *from, struct sftp_conn *to,
1991 char *src, char *targ)
1992 {
1993 char *target = NULL, *filename = NULL, *abs_dst = NULL;
1994 char *abs_src = NULL, *tmp = NULL;
1995 glob_t g;
1996 int i, r, targetisdir, err = 0;
1997
1998 if ((filename = basename(src)) == NULL)
1999 fatal("basename %s: %s", src, strerror(errno));
2000
2001 if ((abs_src = prepare_remote_path(from, src)) == NULL ||
2002 (target = prepare_remote_path(to, targ)) == NULL)
2003 cleanup_exit(255);
2004 memset(&g, 0, sizeof(g));
2005
2006 targetisdir = sftp_remote_is_dir(to, target);
2007 if (!targetisdir && targetshouldbedirectory) {
2008 error("%s: destination is not a directory", targ);
2009 err = -1;
2010 goto out;
2011 }
2012
2013 debug3_f("copying remote %s to remote %s", abs_src, target);
2014 if ((r = sftp_glob(from, abs_src, GLOB_NOCHECK|GLOB_MARK,
2015 NULL, &g)) != 0) {
2016 if (r == GLOB_NOSPACE)
2017 error("%s: too many glob matches", src);
2018 else
2019 error("%s: %s", src, strerror(ENOENT));
2020 err = -1;
2021 goto out;
2022 }
2023
2024 /* Did we actually get any matches back from the glob? */
2025 if (g.gl_matchc == 0 && g.gl_pathc == 1 && g.gl_pathv[0] != 0) {
2026 /*
2027 * If nothing matched but a path returned, then it's probably
2028 * a GLOB_NOCHECK result. Check whether the unglobbed path
2029 * exists so we can give a nice error message early.
2030 */
2031 if (sftp_stat(from, g.gl_pathv[0], 1, NULL) != 0) {
2032 error("%s: %s", src, strerror(ENOENT));
2033 err = -1;
2034 goto out;
2035 }
2036 }
2037
2038 for (i = 0; g.gl_pathv[i] && !interrupted; i++) {
2039 tmp = xstrdup(g.gl_pathv[i]);
2040 if ((filename = basename(tmp)) == NULL) {
2041 error("basename %s: %s", tmp, strerror(errno));
2042 err = -1;
2043 goto out;
2044 }
2045
2046 if (targetisdir)
2047 abs_dst = sftp_path_append(target, filename);
2048 else
2049 abs_dst = xstrdup(target);
2050
2051 debug("Fetching %s to %s\n", g.gl_pathv[i], abs_dst);
2052 if (sftp_globpath_is_dir(g.gl_pathv[i]) && iamrecursive) {
2053 if (sftp_crossload_dir(from, to, g.gl_pathv[i], abs_dst,
2054 NULL, pflag, SFTP_PROGRESS_ONLY, 1) == -1)
2055 err = -1;
2056 } else {
2057 if (sftp_crossload(from, to, g.gl_pathv[i], abs_dst,
2058 NULL, pflag) == -1)
2059 err = -1;
2060 }
2061 free(abs_dst);
2062 abs_dst = NULL;
2063 free(tmp);
2064 tmp = NULL;
2065 }
2066
2067 out:
2068 free(abs_src);
2069 free(abs_dst);
2070 free(target);
2071 free(tmp);
2072 globfree(&g);
2073 if (err == -1)
2074 errs = 1;
2075 }
2076
2077 int
2078 response(void)
2079 {
2080 char ch, *cp, resp, rbuf[2048], visbuf[2048];
2081
2082 if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp))
2083 lostconn(0);
2084
2085 cp = rbuf;
2086 switch (resp) {
2087 case 0: /* ok */
2088 return (0);
2089 default:
2090 *cp++ = resp;
2091 /* FALLTHROUGH */
2092 case 1: /* error, followed by error msg */
2093 case 2: /* fatal error, "" */
2094 do {
2095 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
2096 lostconn(0);
2097 *cp++ = ch;
2098 } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
2099
2100 if (!iamremote) {
2101 cp[-1] = '\0';
2102 (void) snmprintf(visbuf, sizeof(visbuf),
2103 NULL, "%s\n", rbuf);
2104 (void) atomicio(vwrite, STDERR_FILENO,
2105 visbuf, strlen(visbuf));
2106 }
2107 ++errs;
2108 if (resp == 1)
2109 return (-1);
2110 exit(1);
2111 }
2112 /* NOTREACHED */
2113 }
2114
2115 void
2116 usage(void)
2117 {
2118 (void) fprintf(stderr,
2119 "usage: scp [-346ABCOpqRrsTv] [-c cipher] [-D sftp_server_path] [-F ssh_config]\n"
2120 " [-i identity_file] [-J destination] [-l limit] [-o ssh_option]\n"
2121 " [-P port] [-S program] [-X sftp_option] source ... target\n");
2122 exit(1);
2123 }
2124
2125 void
2126 run_err(const char *fmt,...)
2127 {
2128 static FILE *fp;
2129 va_list ap;
2130
2131 ++errs;
2132 if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) {
2133 (void) fprintf(fp, "%c", 0x01);
2134 (void) fprintf(fp, "scp: ");
2135 va_start(ap, fmt);
2136 (void) vfprintf(fp, fmt, ap);
2137 va_end(ap);
2138 (void) fprintf(fp, "\n");
2139 (void) fflush(fp);
2140 }
2141
2142 if (!iamremote) {
2143 va_start(ap, fmt);
2144 vfmprintf(stderr, fmt, ap);
2145 va_end(ap);
2146 fprintf(stderr, "\n");
2147 }
2148 }
2149
2150 /*
2151 * Notes a sink error for sending at the end of a file transfer. Returns 0 if
2152 * no error has been noted or -1 otherwise. Use note_err(NULL) to flush
2153 * any active error at the end of the transfer.
2154 */
2155 int
2156 note_err(const char *fmt, ...)
2157 {
2158 static char *emsg;
2159 va_list ap;
2160
2161 /* Replay any previously-noted error */
2162 if (fmt == NULL) {
2163 if (emsg == NULL)
2164 return 0;
2165 run_err("%s", emsg);
2166 free(emsg);
2167 emsg = NULL;
2168 return -1;
2169 }
2170
2171 errs++;
2172 /* Prefer first-noted error */
2173 if (emsg != NULL)
2174 return -1;
2175
2176 va_start(ap, fmt);
2177 vasnmprintf(&emsg, INT_MAX, NULL, fmt, ap);
2178 va_end(ap);
2179 return -1;
2180 }
2181
2182 void
2183 verifydir(char *cp)
2184 {
2185 struct stat stb;
2186
2187 if (!stat(cp, &stb)) {
2188 if (S_ISDIR(stb.st_mode))
2189 return;
2190 errno = ENOTDIR;
2191 }
2192 run_err("%s: %s", cp, strerror(errno));
2193 killchild(0);
2194 }
2195
2196 int
2197 okname(char *cp0)
2198 {
2199 int c;
2200 char *cp;
2201
2202 cp = cp0;
2203 do {
2204 c = (int)*cp;
2205 if (c & 0200)
2206 goto bad;
2207 if (!isalpha(c) && !isdigit((unsigned char)c)) {
2208 switch (c) {
2209 case '\'':
2210 case '"':
2211 case '`':
2212 case ' ':
2213 case '#':
2214 goto bad;
2215 default:
2216 break;
2217 }
2218 }
2219 } while (*++cp);
2220 return (1);
2221
2222 bad: fmprintf(stderr, "%s: invalid user name\n", cp0);
2223 return (0);
2224 }
2225
2226 BUF *
2227 allocbuf(BUF *bp, int fd, int blksize)
2228 {
2229 size_t size;
2230 #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
2231 struct stat stb;
2232
2233 if (fstat(fd, &stb) == -1) {
2234 run_err("fstat: %s", strerror(errno));
2235 return (0);
2236 }
2237 size = ROUNDUP(stb.st_blksize, blksize);
2238 if (size == 0)
2239 size = blksize;
2240 #else /* HAVE_STRUCT_STAT_ST_BLKSIZE */
2241 size = blksize;
2242 #endif /* HAVE_STRUCT_STAT_ST_BLKSIZE */
2243 if (bp->cnt >= size)
2244 return (bp);
2245 bp->buf = xrecallocarray(bp->buf, bp->cnt, size, 1);
2246 bp->cnt = size;
2247 return (bp);
2248 }
2249
2250 void
2251 lostconn(int signo)
2252 {
2253 if (!iamremote)
2254 (void)write(STDERR_FILENO, "lost connection\n", 16);
2255 if (signo)
2256 _exit(1);
2257 else
2258 exit(1);
2259 }
2260
2261 void
2262 cleanup_exit(int i)
2263 {
2264 if (remin > 0)
2265 close(remin);
2266 if (remout > 0)
2267 close(remout);
2268 if (remin2 > 0)
2269 close(remin2);
2270 if (remout2 > 0)
2271 close(remout2);
2272 if (do_cmd_pid > 0)
2273 (void)waitpid(do_cmd_pid, NULL, 0);
2274 if (do_cmd_pid2 > 0)
2275 (void)waitpid(do_cmd_pid2, NULL, 0);
2276 exit(i);
2277 }
2278