1 /* $OpenBSD: scp.c,v 1.210 2020/05/06 20:57:38 djm 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 #include <limits.h>
101 #include <locale.h>
102 #include <pwd.h>
103 #include <signal.h>
104 #include <stdarg.h>
105 #ifdef HAVE_STDINT_H
106 # include <stdint.h>
107 #endif
108 #include <stdio.h>
109 #include <stdlib.h>
110 #include <string.h>
111 #include <time.h>
112 #include <unistd.h>
113 #if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H) && !defined(BROKEN_STRNVIS)
114 #include <vis.h>
115 #endif
116
117 #include "xmalloc.h"
118 #include "ssh.h"
119 #include "atomicio.h"
120 #include "pathnames.h"
121 #include "log.h"
122 #include "misc.h"
123 #include "progressmeter.h"
124 #include "utf8.h"
125
126 extern char *__progname;
127
128 #define COPY_BUFLEN 16384
129
130 int do_cmd(char *host, char *remuser, int port, char *cmd, int *fdin, int *fdout);
131 int do_cmd2(char *host, char *remuser, int port, char *cmd, int fdin, int fdout);
132
133 /* Struct for addargs */
134 arglist args;
135 arglist remote_remote_args;
136
137 /* Bandwidth limit */
138 long long limit_kbps = 0;
139 struct bwlimit bwlimit;
140
141 /* Name of current file being transferred. */
142 char *curfile;
143
144 /* This is set to non-zero to enable verbose mode. */
145 int verbose_mode = 0;
146
147 /* This is set to zero if the progressmeter is not desired. */
148 int showprogress = 1;
149
150 /*
151 * This is set to non-zero if remote-remote copy should be piped
152 * through this process.
153 */
154 int throughlocal = 0;
155
156 /* Non-standard port to use for the ssh connection or -1. */
157 int sshport = -1;
158
159 /* This is the program to execute for the secured connection. ("ssh" or -S) */
160 char *ssh_program = _PATH_SSH_PROGRAM;
161
162 /* This is used to store the pid of ssh_program */
163 pid_t do_cmd_pid = -1;
164
165 static void
killchild(int signo)166 killchild(int signo)
167 {
168 if (do_cmd_pid > 1) {
169 kill(do_cmd_pid, signo ? signo : SIGTERM);
170 waitpid(do_cmd_pid, NULL, 0);
171 }
172
173 if (signo)
174 _exit(1);
175 exit(1);
176 }
177
178 static void
suspchild(int signo)179 suspchild(int signo)
180 {
181 int status;
182
183 if (do_cmd_pid > 1) {
184 kill(do_cmd_pid, signo);
185 while (waitpid(do_cmd_pid, &status, WUNTRACED) == -1 &&
186 errno == EINTR)
187 ;
188 kill(getpid(), SIGSTOP);
189 }
190 }
191
192 static int
do_local_cmd(arglist * a)193 do_local_cmd(arglist *a)
194 {
195 u_int i;
196 int status;
197 pid_t pid;
198
199 if (a->num == 0)
200 fatal("do_local_cmd: no arguments");
201
202 if (verbose_mode) {
203 fprintf(stderr, "Executing:");
204 for (i = 0; i < a->num; i++)
205 fmprintf(stderr, " %s", a->list[i]);
206 fprintf(stderr, "\n");
207 }
208 if ((pid = fork()) == -1)
209 fatal("do_local_cmd: fork: %s", strerror(errno));
210
211 if (pid == 0) {
212 execvp(a->list[0], a->list);
213 perror(a->list[0]);
214 exit(1);
215 }
216
217 do_cmd_pid = pid;
218 ssh_signal(SIGTERM, killchild);
219 ssh_signal(SIGINT, killchild);
220 ssh_signal(SIGHUP, killchild);
221
222 while (waitpid(pid, &status, 0) == -1)
223 if (errno != EINTR)
224 fatal("do_local_cmd: waitpid: %s", strerror(errno));
225
226 do_cmd_pid = -1;
227
228 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
229 return (-1);
230
231 return (0);
232 }
233
234 /*
235 * This function executes the given command as the specified user on the
236 * given host. This returns < 0 if execution fails, and >= 0 otherwise. This
237 * assigns the input and output file descriptors on success.
238 */
239
240 int
do_cmd(char * host,char * remuser,int port,char * cmd,int * fdin,int * fdout)241 do_cmd(char *host, char *remuser, int port, char *cmd, int *fdin, int *fdout)
242 {
243 int pin[2], pout[2], reserved[2];
244
245 if (verbose_mode)
246 fmprintf(stderr,
247 "Executing: program %s host %s, user %s, command %s\n",
248 ssh_program, host,
249 remuser ? remuser : "(unspecified)", cmd);
250
251 if (port == -1)
252 port = sshport;
253
254 /*
255 * Reserve two descriptors so that the real pipes won't get
256 * descriptors 0 and 1 because that will screw up dup2 below.
257 */
258 if (pipe(reserved) == -1)
259 fatal("pipe: %s", strerror(errno));
260
261 /* Create a socket pair for communicating with ssh. */
262 if (pipe(pin) == -1)
263 fatal("pipe: %s", strerror(errno));
264 if (pipe(pout) == -1)
265 fatal("pipe: %s", strerror(errno));
266
267 /* Free the reserved descriptors. */
268 close(reserved[0]);
269 close(reserved[1]);
270
271 ssh_signal(SIGTSTP, suspchild);
272 ssh_signal(SIGTTIN, suspchild);
273 ssh_signal(SIGTTOU, suspchild);
274
275 /* Fork a child to execute the command on the remote host using ssh. */
276 do_cmd_pid = fork();
277 if (do_cmd_pid == 0) {
278 /* Child. */
279 close(pin[1]);
280 close(pout[0]);
281 dup2(pin[0], 0);
282 dup2(pout[1], 1);
283 close(pin[0]);
284 close(pout[1]);
285
286 replacearg(&args, 0, "%s", ssh_program);
287 if (port != -1) {
288 addargs(&args, "-p");
289 addargs(&args, "%d", port);
290 }
291 if (remuser != NULL) {
292 addargs(&args, "-l");
293 addargs(&args, "%s", remuser);
294 }
295 addargs(&args, "--");
296 addargs(&args, "%s", host);
297 addargs(&args, "%s", cmd);
298
299 execvp(ssh_program, args.list);
300 perror(ssh_program);
301 exit(1);
302 } else if (do_cmd_pid == -1) {
303 fatal("fork: %s", strerror(errno));
304 }
305 /* Parent. Close the other side, and return the local side. */
306 close(pin[0]);
307 *fdout = pin[1];
308 close(pout[1]);
309 *fdin = pout[0];
310 ssh_signal(SIGTERM, killchild);
311 ssh_signal(SIGINT, killchild);
312 ssh_signal(SIGHUP, killchild);
313 return 0;
314 }
315
316 /*
317 * This function executes a command similar to do_cmd(), but expects the
318 * input and output descriptors to be setup by a previous call to do_cmd().
319 * This way the input and output of two commands can be connected.
320 */
321 int
do_cmd2(char * host,char * remuser,int port,char * cmd,int fdin,int fdout)322 do_cmd2(char *host, char *remuser, int port, char *cmd, int fdin, int fdout)
323 {
324 pid_t pid;
325 int status;
326
327 if (verbose_mode)
328 fmprintf(stderr,
329 "Executing: 2nd program %s host %s, user %s, command %s\n",
330 ssh_program, host,
331 remuser ? remuser : "(unspecified)", cmd);
332
333 if (port == -1)
334 port = sshport;
335
336 /* Fork a child to execute the command on the remote host using ssh. */
337 pid = fork();
338 if (pid == 0) {
339 dup2(fdin, 0);
340 dup2(fdout, 1);
341
342 replacearg(&args, 0, "%s", ssh_program);
343 if (port != -1) {
344 addargs(&args, "-p");
345 addargs(&args, "%d", port);
346 }
347 if (remuser != NULL) {
348 addargs(&args, "-l");
349 addargs(&args, "%s", remuser);
350 }
351 addargs(&args, "-oBatchMode=yes");
352 addargs(&args, "--");
353 addargs(&args, "%s", host);
354 addargs(&args, "%s", cmd);
355
356 execvp(ssh_program, args.list);
357 perror(ssh_program);
358 exit(1);
359 } else if (pid == -1) {
360 fatal("fork: %s", strerror(errno));
361 }
362 while (waitpid(pid, &status, 0) == -1)
363 if (errno != EINTR)
364 fatal("do_cmd2: waitpid: %s", strerror(errno));
365 return 0;
366 }
367
368 typedef struct {
369 size_t cnt;
370 char *buf;
371 } BUF;
372
373 BUF *allocbuf(BUF *, int, int);
374 void lostconn(int);
375 int okname(char *);
376 void run_err(const char *,...);
377 int note_err(const char *,...);
378 void verifydir(char *);
379
380 struct passwd *pwd;
381 uid_t userid;
382 int errs, remin, remout;
383 int Tflag, pflag, iamremote, iamrecursive, targetshouldbedirectory;
384
385 #define CMDNEEDS 64
386 char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
387
388 int response(void);
389 void rsource(char *, struct stat *);
390 void sink(int, char *[], const char *);
391 void source(int, char *[]);
392 void tolocal(int, char *[]);
393 void toremote(int, char *[]);
394 void usage(void);
395
396 int
main(int argc,char ** argv)397 main(int argc, char **argv)
398 {
399 int ch, fflag, tflag, status, n;
400 char **newargv;
401 const char *errstr;
402 extern char *optarg;
403 extern int optind;
404
405 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
406 sanitise_stdfd();
407
408 seed_rng();
409
410 msetlocale();
411
412 /* Copy argv, because we modify it */
413 newargv = xcalloc(MAXIMUM(argc + 1, 1), sizeof(*newargv));
414 for (n = 0; n < argc; n++)
415 newargv[n] = xstrdup(argv[n]);
416 argv = newargv;
417
418 __progname = ssh_get_progname(argv[0]);
419
420 memset(&args, '\0', sizeof(args));
421 memset(&remote_remote_args, '\0', sizeof(remote_remote_args));
422 args.list = remote_remote_args.list = NULL;
423 addargs(&args, "%s", ssh_program);
424 addargs(&args, "-x");
425 addargs(&args, "-oForwardAgent=no");
426 addargs(&args, "-oPermitLocalCommand=no");
427 addargs(&args, "-oClearAllForwardings=yes");
428 addargs(&args, "-oRemoteCommand=none");
429 addargs(&args, "-oRequestTTY=no");
430
431 fflag = Tflag = tflag = 0;
432 while ((ch = getopt(argc, argv,
433 "dfl:prtTvBCc:i:P:q12346S:o:F:J:")) != -1) {
434 switch (ch) {
435 /* User-visible flags. */
436 case '1':
437 fatal("SSH protocol v.1 is no longer supported");
438 break;
439 case '2':
440 /* Ignored */
441 break;
442 case '4':
443 case '6':
444 case 'C':
445 addargs(&args, "-%c", ch);
446 addargs(&remote_remote_args, "-%c", ch);
447 break;
448 case '3':
449 throughlocal = 1;
450 break;
451 case 'o':
452 case 'c':
453 case 'i':
454 case 'F':
455 case 'J':
456 addargs(&remote_remote_args, "-%c", ch);
457 addargs(&remote_remote_args, "%s", optarg);
458 addargs(&args, "-%c", ch);
459 addargs(&args, "%s", optarg);
460 break;
461 case 'P':
462 sshport = a2port(optarg);
463 if (sshport <= 0)
464 fatal("bad port \"%s\"\n", optarg);
465 break;
466 case 'B':
467 addargs(&remote_remote_args, "-oBatchmode=yes");
468 addargs(&args, "-oBatchmode=yes");
469 break;
470 case 'l':
471 limit_kbps = strtonum(optarg, 1, 100 * 1024 * 1024,
472 &errstr);
473 if (errstr != NULL)
474 usage();
475 limit_kbps *= 1024; /* kbps */
476 bandwidth_limit_init(&bwlimit, limit_kbps, COPY_BUFLEN);
477 break;
478 case 'p':
479 pflag = 1;
480 break;
481 case 'r':
482 iamrecursive = 1;
483 break;
484 case 'S':
485 ssh_program = xstrdup(optarg);
486 break;
487 case 'v':
488 addargs(&args, "-v");
489 addargs(&remote_remote_args, "-v");
490 verbose_mode = 1;
491 break;
492 case 'q':
493 addargs(&args, "-q");
494 addargs(&remote_remote_args, "-q");
495 showprogress = 0;
496 break;
497
498 /* Server options. */
499 case 'd':
500 targetshouldbedirectory = 1;
501 break;
502 case 'f': /* "from" */
503 iamremote = 1;
504 fflag = 1;
505 break;
506 case 't': /* "to" */
507 iamremote = 1;
508 tflag = 1;
509 #ifdef HAVE_CYGWIN
510 setmode(0, O_BINARY);
511 #endif
512 break;
513 case 'T':
514 Tflag = 1;
515 break;
516 default:
517 usage();
518 }
519 }
520 argc -= optind;
521 argv += optind;
522
523 if ((pwd = getpwuid(userid = getuid())) == NULL)
524 fatal("unknown user %u", (u_int) userid);
525
526 if (!isatty(STDOUT_FILENO))
527 showprogress = 0;
528
529 if (pflag) {
530 /* Cannot pledge: -p allows setuid/setgid files... */
531 } else {
532 if (pledge("stdio rpath wpath cpath fattr tty proc exec",
533 NULL) == -1) {
534 perror("pledge");
535 exit(1);
536 }
537 }
538
539 remin = STDIN_FILENO;
540 remout = STDOUT_FILENO;
541
542 if (fflag) {
543 /* Follow "protocol", send data. */
544 (void) response();
545 source(argc, argv);
546 exit(errs != 0);
547 }
548 if (tflag) {
549 /* Receive data. */
550 sink(argc, argv, NULL);
551 exit(errs != 0);
552 }
553 if (argc < 2)
554 usage();
555 if (argc > 2)
556 targetshouldbedirectory = 1;
557
558 remin = remout = -1;
559 do_cmd_pid = -1;
560 /* Command to be executed on remote system using "ssh". */
561 (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
562 verbose_mode ? " -v" : "",
563 iamrecursive ? " -r" : "", pflag ? " -p" : "",
564 targetshouldbedirectory ? " -d" : "");
565
566 (void) ssh_signal(SIGPIPE, lostconn);
567
568 if (colon(argv[argc - 1])) /* Dest is remote host. */
569 toremote(argc, argv);
570 else {
571 if (targetshouldbedirectory)
572 verifydir(argv[argc - 1]);
573 tolocal(argc, argv); /* Dest is local host. */
574 }
575 /*
576 * Finally check the exit status of the ssh process, if one was forked
577 * and no error has occurred yet
578 */
579 if (do_cmd_pid != -1 && errs == 0) {
580 if (remin != -1)
581 (void) close(remin);
582 if (remout != -1)
583 (void) close(remout);
584 if (waitpid(do_cmd_pid, &status, 0) == -1)
585 errs = 1;
586 else {
587 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
588 errs = 1;
589 }
590 }
591 exit(errs != 0);
592 }
593
594 /* Callback from atomicio6 to update progress meter and limit bandwidth */
595 static int
scpio(void * _cnt,size_t s)596 scpio(void *_cnt, size_t s)
597 {
598 off_t *cnt = (off_t *)_cnt;
599
600 *cnt += s;
601 refresh_progress_meter(0);
602 if (limit_kbps > 0)
603 bandwidth_limit(&bwlimit, s);
604 return 0;
605 }
606
607 static int
do_times(int fd,int verb,const struct stat * sb)608 do_times(int fd, int verb, const struct stat *sb)
609 {
610 /* strlen(2^64) == 20; strlen(10^6) == 7 */
611 char buf[(20 + 7 + 2) * 2 + 2];
612
613 (void)snprintf(buf, sizeof(buf), "T%llu 0 %llu 0\n",
614 (unsigned long long) (sb->st_mtime < 0 ? 0 : sb->st_mtime),
615 (unsigned long long) (sb->st_atime < 0 ? 0 : sb->st_atime));
616 if (verb) {
617 fprintf(stderr, "File mtime %lld atime %lld\n",
618 (long long)sb->st_mtime, (long long)sb->st_atime);
619 fprintf(stderr, "Sending file timestamps: %s", buf);
620 }
621 (void) atomicio(vwrite, fd, buf, strlen(buf));
622 return (response());
623 }
624
625 static int
parse_scp_uri(const char * uri,char ** userp,char ** hostp,int * portp,char ** pathp)626 parse_scp_uri(const char *uri, char **userp, char **hostp, int *portp,
627 char **pathp)
628 {
629 int r;
630
631 r = parse_uri("scp", uri, userp, hostp, portp, pathp);
632 if (r == 0 && *pathp == NULL)
633 *pathp = xstrdup(".");
634 return r;
635 }
636
637 /* Appends a string to an array; returns 0 on success, -1 on alloc failure */
638 static int
append(char * cp,char *** ap,size_t * np)639 append(char *cp, char ***ap, size_t *np)
640 {
641 char **tmp;
642
643 if ((tmp = reallocarray(*ap, *np + 1, sizeof(*tmp))) == NULL)
644 return -1;
645 tmp[(*np)] = cp;
646 (*np)++;
647 *ap = tmp;
648 return 0;
649 }
650
651 /*
652 * Finds the start and end of the first brace pair in the pattern.
653 * returns 0 on success or -1 for invalid patterns.
654 */
655 static int
find_brace(const char * pattern,int * startp,int * endp)656 find_brace(const char *pattern, int *startp, int *endp)
657 {
658 int i;
659 int in_bracket, brace_level;
660
661 *startp = *endp = -1;
662 in_bracket = brace_level = 0;
663 for (i = 0; i < INT_MAX && *endp < 0 && pattern[i] != '\0'; i++) {
664 switch (pattern[i]) {
665 case '\\':
666 /* skip next character */
667 if (pattern[i + 1] != '\0')
668 i++;
669 break;
670 case '[':
671 in_bracket = 1;
672 break;
673 case ']':
674 in_bracket = 0;
675 break;
676 case '{':
677 if (in_bracket)
678 break;
679 if (pattern[i + 1] == '}') {
680 /* Protect a single {}, for find(1), like csh */
681 i++; /* skip */
682 break;
683 }
684 if (*startp == -1)
685 *startp = i;
686 brace_level++;
687 break;
688 case '}':
689 if (in_bracket)
690 break;
691 if (*startp < 0) {
692 /* Unbalanced brace */
693 return -1;
694 }
695 if (--brace_level <= 0)
696 *endp = i;
697 break;
698 }
699 }
700 /* unbalanced brackets/braces */
701 if (*endp < 0 && (*startp >= 0 || in_bracket))
702 return -1;
703 return 0;
704 }
705
706 /*
707 * Assembles and records a successfully-expanded pattern, returns -1 on
708 * alloc failure.
709 */
710 static int
emit_expansion(const char * pattern,int brace_start,int brace_end,int sel_start,int sel_end,char *** patternsp,size_t * npatternsp)711 emit_expansion(const char *pattern, int brace_start, int brace_end,
712 int sel_start, int sel_end, char ***patternsp, size_t *npatternsp)
713 {
714 char *cp;
715 int o = 0, tail_len = strlen(pattern + brace_end + 1);
716
717 if ((cp = malloc(brace_start + (sel_end - sel_start) +
718 tail_len + 1)) == NULL)
719 return -1;
720
721 /* Pattern before initial brace */
722 if (brace_start > 0) {
723 memcpy(cp, pattern, brace_start);
724 o = brace_start;
725 }
726 /* Current braced selection */
727 if (sel_end - sel_start > 0) {
728 memcpy(cp + o, pattern + sel_start,
729 sel_end - sel_start);
730 o += sel_end - sel_start;
731 }
732 /* Remainder of pattern after closing brace */
733 if (tail_len > 0) {
734 memcpy(cp + o, pattern + brace_end + 1, tail_len);
735 o += tail_len;
736 }
737 cp[o] = '\0';
738 if (append(cp, patternsp, npatternsp) != 0) {
739 free(cp);
740 return -1;
741 }
742 return 0;
743 }
744
745 /*
746 * Expand the first encountered brace in pattern, appending the expanded
747 * patterns it yielded to the *patternsp array.
748 *
749 * Returns 0 on success or -1 on allocation failure.
750 *
751 * Signals whether expansion was performed via *expanded and whether
752 * pattern was invalid via *invalid.
753 */
754 static int
brace_expand_one(const char * pattern,char *** patternsp,size_t * npatternsp,int * expanded,int * invalid)755 brace_expand_one(const char *pattern, char ***patternsp, size_t *npatternsp,
756 int *expanded, int *invalid)
757 {
758 int i;
759 int in_bracket, brace_start, brace_end, brace_level;
760 int sel_start, sel_end;
761
762 *invalid = *expanded = 0;
763
764 if (find_brace(pattern, &brace_start, &brace_end) != 0) {
765 *invalid = 1;
766 return 0;
767 } else if (brace_start == -1)
768 return 0;
769
770 in_bracket = brace_level = 0;
771 for (i = sel_start = brace_start + 1; i < brace_end; i++) {
772 switch (pattern[i]) {
773 case '{':
774 if (in_bracket)
775 break;
776 brace_level++;
777 break;
778 case '}':
779 if (in_bracket)
780 break;
781 brace_level--;
782 break;
783 case '[':
784 in_bracket = 1;
785 break;
786 case ']':
787 in_bracket = 0;
788 break;
789 case '\\':
790 if (i < brace_end - 1)
791 i++; /* skip */
792 break;
793 }
794 if (pattern[i] == ',' || i == brace_end - 1) {
795 if (in_bracket || brace_level > 0)
796 continue;
797 /* End of a selection, emit an expanded pattern */
798
799 /* Adjust end index for last selection */
800 sel_end = (i == brace_end - 1) ? brace_end : i;
801 if (emit_expansion(pattern, brace_start, brace_end,
802 sel_start, sel_end, patternsp, npatternsp) != 0)
803 return -1;
804 /* move on to the next selection */
805 sel_start = i + 1;
806 continue;
807 }
808 }
809 if (in_bracket || brace_level > 0) {
810 *invalid = 1;
811 return 0;
812 }
813 /* success */
814 *expanded = 1;
815 return 0;
816 }
817
818 /* Expand braces from pattern. Returns 0 on success, -1 on failure */
819 static int
brace_expand(const char * pattern,char *** patternsp,size_t * npatternsp)820 brace_expand(const char *pattern, char ***patternsp, size_t *npatternsp)
821 {
822 char *cp, *cp2, **active = NULL, **done = NULL;
823 size_t i, nactive = 0, ndone = 0;
824 int ret = -1, invalid = 0, expanded = 0;
825
826 *patternsp = NULL;
827 *npatternsp = 0;
828
829 /* Start the worklist with the original pattern */
830 if ((cp = strdup(pattern)) == NULL)
831 return -1;
832 if (append(cp, &active, &nactive) != 0) {
833 free(cp);
834 return -1;
835 }
836 while (nactive > 0) {
837 cp = active[nactive - 1];
838 nactive--;
839 if (brace_expand_one(cp, &active, &nactive,
840 &expanded, &invalid) == -1) {
841 free(cp);
842 goto fail;
843 }
844 if (invalid)
845 fatal("%s: invalid brace pattern \"%s\"", __func__, cp);
846 if (expanded) {
847 /*
848 * Current entry expanded to new entries on the
849 * active list; discard the progenitor pattern.
850 */
851 free(cp);
852 continue;
853 }
854 /*
855 * Pattern did not expand; append the finename component to
856 * the completed list
857 */
858 if ((cp2 = strrchr(cp, '/')) != NULL)
859 *cp2++ = '\0';
860 else
861 cp2 = cp;
862 if (append(xstrdup(cp2), &done, &ndone) != 0) {
863 free(cp);
864 goto fail;
865 }
866 free(cp);
867 }
868 /* success */
869 *patternsp = done;
870 *npatternsp = ndone;
871 done = NULL;
872 ndone = 0;
873 ret = 0;
874 fail:
875 for (i = 0; i < nactive; i++)
876 free(active[i]);
877 free(active);
878 for (i = 0; i < ndone; i++)
879 free(done[i]);
880 free(done);
881 return ret;
882 }
883
884 void
toremote(int argc,char ** argv)885 toremote(int argc, char **argv)
886 {
887 char *suser = NULL, *host = NULL, *src = NULL;
888 char *bp, *tuser, *thost, *targ;
889 int sport = -1, tport = -1;
890 arglist alist;
891 int i, r;
892 u_int j;
893
894 memset(&alist, '\0', sizeof(alist));
895 alist.list = NULL;
896
897 /* Parse target */
898 r = parse_scp_uri(argv[argc - 1], &tuser, &thost, &tport, &targ);
899 if (r == -1) {
900 fmprintf(stderr, "%s: invalid uri\n", argv[argc - 1]);
901 ++errs;
902 goto out;
903 }
904 if (r != 0) {
905 if (parse_user_host_path(argv[argc - 1], &tuser, &thost,
906 &targ) == -1) {
907 fmprintf(stderr, "%s: invalid target\n", argv[argc - 1]);
908 ++errs;
909 goto out;
910 }
911 }
912 if (tuser != NULL && !okname(tuser)) {
913 ++errs;
914 goto out;
915 }
916
917 /* Parse source files */
918 for (i = 0; i < argc - 1; i++) {
919 free(suser);
920 free(host);
921 free(src);
922 r = parse_scp_uri(argv[i], &suser, &host, &sport, &src);
923 if (r == -1) {
924 fmprintf(stderr, "%s: invalid uri\n", argv[i]);
925 ++errs;
926 continue;
927 }
928 if (r != 0) {
929 parse_user_host_path(argv[i], &suser, &host, &src);
930 }
931 if (suser != NULL && !okname(suser)) {
932 ++errs;
933 continue;
934 }
935 if (host && throughlocal) { /* extended remote to remote */
936 xasprintf(&bp, "%s -f %s%s", cmd,
937 *src == '-' ? "-- " : "", src);
938 if (do_cmd(host, suser, sport, bp, &remin, &remout) < 0)
939 exit(1);
940 free(bp);
941 xasprintf(&bp, "%s -t %s%s", cmd,
942 *targ == '-' ? "-- " : "", targ);
943 if (do_cmd2(thost, tuser, tport, bp, remin, remout) < 0)
944 exit(1);
945 free(bp);
946 (void) close(remin);
947 (void) close(remout);
948 remin = remout = -1;
949 } else if (host) { /* standard remote to remote */
950 if (tport != -1 && tport != SSH_DEFAULT_PORT) {
951 /* This would require the remote support URIs */
952 fatal("target port not supported with two "
953 "remote hosts without the -3 option");
954 }
955
956 freeargs(&alist);
957 addargs(&alist, "%s", ssh_program);
958 addargs(&alist, "-x");
959 addargs(&alist, "-oClearAllForwardings=yes");
960 addargs(&alist, "-n");
961 for (j = 0; j < remote_remote_args.num; j++) {
962 addargs(&alist, "%s",
963 remote_remote_args.list[j]);
964 }
965
966 if (sport != -1) {
967 addargs(&alist, "-p");
968 addargs(&alist, "%d", sport);
969 }
970 if (suser) {
971 addargs(&alist, "-l");
972 addargs(&alist, "%s", suser);
973 }
974 addargs(&alist, "--");
975 addargs(&alist, "%s", host);
976 addargs(&alist, "%s", cmd);
977 addargs(&alist, "%s", src);
978 addargs(&alist, "%s%s%s:%s",
979 tuser ? tuser : "", tuser ? "@" : "",
980 thost, targ);
981 if (do_local_cmd(&alist) != 0)
982 errs = 1;
983 } else { /* local to remote */
984 if (remin == -1) {
985 xasprintf(&bp, "%s -t %s%s", cmd,
986 *targ == '-' ? "-- " : "", targ);
987 if (do_cmd(thost, tuser, tport, bp, &remin,
988 &remout) < 0)
989 exit(1);
990 if (response() < 0)
991 exit(1);
992 free(bp);
993 }
994 source(1, argv + i);
995 }
996 }
997 out:
998 free(tuser);
999 free(thost);
1000 free(targ);
1001 free(suser);
1002 free(host);
1003 free(src);
1004 }
1005
1006 void
tolocal(int argc,char ** argv)1007 tolocal(int argc, char **argv)
1008 {
1009 char *bp, *host = NULL, *src = NULL, *suser = NULL;
1010 arglist alist;
1011 int i, r, sport = -1;
1012
1013 memset(&alist, '\0', sizeof(alist));
1014 alist.list = NULL;
1015
1016 for (i = 0; i < argc - 1; i++) {
1017 free(suser);
1018 free(host);
1019 free(src);
1020 r = parse_scp_uri(argv[i], &suser, &host, &sport, &src);
1021 if (r == -1) {
1022 fmprintf(stderr, "%s: invalid uri\n", argv[i]);
1023 ++errs;
1024 continue;
1025 }
1026 if (r != 0)
1027 parse_user_host_path(argv[i], &suser, &host, &src);
1028 if (suser != NULL && !okname(suser)) {
1029 ++errs;
1030 continue;
1031 }
1032 if (!host) { /* Local to local. */
1033 freeargs(&alist);
1034 addargs(&alist, "%s", _PATH_CP);
1035 if (iamrecursive)
1036 addargs(&alist, "-r");
1037 if (pflag)
1038 addargs(&alist, "-p");
1039 addargs(&alist, "--");
1040 addargs(&alist, "%s", argv[i]);
1041 addargs(&alist, "%s", argv[argc-1]);
1042 if (do_local_cmd(&alist))
1043 ++errs;
1044 continue;
1045 }
1046 /* Remote to local. */
1047 xasprintf(&bp, "%s -f %s%s",
1048 cmd, *src == '-' ? "-- " : "", src);
1049 if (do_cmd(host, suser, sport, bp, &remin, &remout) < 0) {
1050 free(bp);
1051 ++errs;
1052 continue;
1053 }
1054 free(bp);
1055 sink(1, argv + argc - 1, src);
1056 (void) close(remin);
1057 remin = remout = -1;
1058 }
1059 free(suser);
1060 free(host);
1061 free(src);
1062 }
1063
1064 void
source(int argc,char ** argv)1065 source(int argc, char **argv)
1066 {
1067 struct stat stb;
1068 static BUF buffer;
1069 BUF *bp;
1070 off_t i, statbytes;
1071 size_t amt, nr;
1072 int fd = -1, haderr, indx;
1073 char *last, *name, buf[PATH_MAX + 128], encname[PATH_MAX];
1074 int len;
1075
1076 for (indx = 0; indx < argc; ++indx) {
1077 name = argv[indx];
1078 statbytes = 0;
1079 len = strlen(name);
1080 while (len > 1 && name[len-1] == '/')
1081 name[--len] = '\0';
1082 if ((fd = open(name, O_RDONLY|O_NONBLOCK, 0)) == -1)
1083 goto syserr;
1084 if (strchr(name, '\n') != NULL) {
1085 strnvis(encname, name, sizeof(encname), VIS_NL);
1086 name = encname;
1087 }
1088 if (fstat(fd, &stb) == -1) {
1089 syserr: run_err("%s: %s", name, strerror(errno));
1090 goto next;
1091 }
1092 if (stb.st_size < 0) {
1093 run_err("%s: %s", name, "Negative file size");
1094 goto next;
1095 }
1096 unset_nonblock(fd);
1097 switch (stb.st_mode & S_IFMT) {
1098 case S_IFREG:
1099 break;
1100 case S_IFDIR:
1101 if (iamrecursive) {
1102 rsource(name, &stb);
1103 goto next;
1104 }
1105 /* FALLTHROUGH */
1106 default:
1107 run_err("%s: not a regular file", name);
1108 goto next;
1109 }
1110 if ((last = strrchr(name, '/')) == NULL)
1111 last = name;
1112 else
1113 ++last;
1114 curfile = last;
1115 if (pflag) {
1116 if (do_times(remout, verbose_mode, &stb) < 0)
1117 goto next;
1118 }
1119 #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
1120 snprintf(buf, sizeof buf, "C%04o %lld %s\n",
1121 (u_int) (stb.st_mode & FILEMODEMASK),
1122 (long long)stb.st_size, last);
1123 if (verbose_mode)
1124 fmprintf(stderr, "Sending file modes: %s", buf);
1125 (void) atomicio(vwrite, remout, buf, strlen(buf));
1126 if (response() < 0)
1127 goto next;
1128 if ((bp = allocbuf(&buffer, fd, COPY_BUFLEN)) == NULL) {
1129 next: if (fd != -1) {
1130 (void) close(fd);
1131 fd = -1;
1132 }
1133 continue;
1134 }
1135 if (showprogress)
1136 start_progress_meter(curfile, stb.st_size, &statbytes);
1137 set_nonblock(remout);
1138 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
1139 amt = bp->cnt;
1140 if (i + (off_t)amt > stb.st_size)
1141 amt = stb.st_size - i;
1142 if (!haderr) {
1143 if ((nr = atomicio(read, fd,
1144 bp->buf, amt)) != amt) {
1145 haderr = errno;
1146 memset(bp->buf + nr, 0, amt - nr);
1147 }
1148 }
1149 /* Keep writing after error to retain sync */
1150 if (haderr) {
1151 (void)atomicio(vwrite, remout, bp->buf, amt);
1152 memset(bp->buf, 0, amt);
1153 continue;
1154 }
1155 if (atomicio6(vwrite, remout, bp->buf, amt, scpio,
1156 &statbytes) != amt)
1157 haderr = errno;
1158 }
1159 unset_nonblock(remout);
1160
1161 if (fd != -1) {
1162 if (close(fd) == -1 && !haderr)
1163 haderr = errno;
1164 fd = -1;
1165 }
1166 if (!haderr)
1167 (void) atomicio(vwrite, remout, "", 1);
1168 else
1169 run_err("%s: %s", name, strerror(haderr));
1170 (void) response();
1171 if (showprogress)
1172 stop_progress_meter();
1173 }
1174 }
1175
1176 void
rsource(char * name,struct stat * statp)1177 rsource(char *name, struct stat *statp)
1178 {
1179 DIR *dirp;
1180 struct dirent *dp;
1181 char *last, *vect[1], path[PATH_MAX];
1182
1183 if (!(dirp = opendir(name))) {
1184 run_err("%s: %s", name, strerror(errno));
1185 return;
1186 }
1187 last = strrchr(name, '/');
1188 if (last == NULL)
1189 last = name;
1190 else
1191 last++;
1192 if (pflag) {
1193 if (do_times(remout, verbose_mode, statp) < 0) {
1194 closedir(dirp);
1195 return;
1196 }
1197 }
1198 (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n",
1199 (u_int) (statp->st_mode & FILEMODEMASK), 0, last);
1200 if (verbose_mode)
1201 fmprintf(stderr, "Entering directory: %s", path);
1202 (void) atomicio(vwrite, remout, path, strlen(path));
1203 if (response() < 0) {
1204 closedir(dirp);
1205 return;
1206 }
1207 while ((dp = readdir(dirp)) != NULL) {
1208 if (dp->d_ino == 0)
1209 continue;
1210 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
1211 continue;
1212 if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) {
1213 run_err("%s/%s: name too long", name, dp->d_name);
1214 continue;
1215 }
1216 (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name);
1217 vect[0] = path;
1218 source(1, vect);
1219 }
1220 (void) closedir(dirp);
1221 (void) atomicio(vwrite, remout, "E\n", 2);
1222 (void) response();
1223 }
1224
1225 #define TYPE_OVERFLOW(type, val) \
1226 ((sizeof(type) == 4 && (val) > INT32_MAX) || \
1227 (sizeof(type) == 8 && (val) > INT64_MAX) || \
1228 (sizeof(type) != 4 && sizeof(type) != 8))
1229
1230 void
sink(int argc,char ** argv,const char * src)1231 sink(int argc, char **argv, const char *src)
1232 {
1233 static BUF buffer;
1234 struct stat stb;
1235 BUF *bp;
1236 off_t i;
1237 size_t j, count;
1238 int amt, exists, first, ofd;
1239 mode_t mode, omode, mask;
1240 off_t size, statbytes;
1241 unsigned long long ull;
1242 int setimes, targisdir, wrerr;
1243 char ch, *cp, *np, *targ, *why, *vect[1], buf[2048], visbuf[2048];
1244 char **patterns = NULL;
1245 size_t n, npatterns = 0;
1246 struct timeval tv[2];
1247
1248 #define atime tv[0]
1249 #define mtime tv[1]
1250 #define SCREWUP(str) { why = str; goto screwup; }
1251
1252 if (TYPE_OVERFLOW(time_t, 0) || TYPE_OVERFLOW(off_t, 0))
1253 SCREWUP("Unexpected off_t/time_t size");
1254
1255 setimes = targisdir = 0;
1256 mask = umask(0);
1257 if (!pflag)
1258 (void) umask(mask);
1259 if (argc != 1) {
1260 run_err("ambiguous target");
1261 exit(1);
1262 }
1263 targ = *argv;
1264 if (targetshouldbedirectory)
1265 verifydir(targ);
1266
1267 (void) atomicio(vwrite, remout, "", 1);
1268 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
1269 targisdir = 1;
1270 if (src != NULL && !iamrecursive && !Tflag) {
1271 /*
1272 * Prepare to try to restrict incoming filenames to match
1273 * the requested destination file glob.
1274 */
1275 if (brace_expand(src, &patterns, &npatterns) != 0)
1276 fatal("%s: could not expand pattern", __func__);
1277 }
1278 for (first = 1;; first = 0) {
1279 cp = buf;
1280 if (atomicio(read, remin, cp, 1) != 1)
1281 goto done;
1282 if (*cp++ == '\n')
1283 SCREWUP("unexpected <newline>");
1284 do {
1285 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1286 SCREWUP("lost connection");
1287 *cp++ = ch;
1288 } while (cp < &buf[sizeof(buf) - 1] && ch != '\n');
1289 *cp = 0;
1290 if (verbose_mode)
1291 fmprintf(stderr, "Sink: %s", buf);
1292
1293 if (buf[0] == '\01' || buf[0] == '\02') {
1294 if (iamremote == 0) {
1295 (void) snmprintf(visbuf, sizeof(visbuf),
1296 NULL, "%s", buf + 1);
1297 (void) atomicio(vwrite, STDERR_FILENO,
1298 visbuf, strlen(visbuf));
1299 }
1300 if (buf[0] == '\02')
1301 exit(1);
1302 ++errs;
1303 continue;
1304 }
1305 if (buf[0] == 'E') {
1306 (void) atomicio(vwrite, remout, "", 1);
1307 goto done;
1308 }
1309 if (ch == '\n')
1310 *--cp = 0;
1311
1312 cp = buf;
1313 if (*cp == 'T') {
1314 setimes++;
1315 cp++;
1316 if (!isdigit((unsigned char)*cp))
1317 SCREWUP("mtime.sec not present");
1318 ull = strtoull(cp, &cp, 10);
1319 if (!cp || *cp++ != ' ')
1320 SCREWUP("mtime.sec not delimited");
1321 if (TYPE_OVERFLOW(time_t, ull))
1322 setimes = 0; /* out of range */
1323 mtime.tv_sec = ull;
1324 mtime.tv_usec = strtol(cp, &cp, 10);
1325 if (!cp || *cp++ != ' ' || mtime.tv_usec < 0 ||
1326 mtime.tv_usec > 999999)
1327 SCREWUP("mtime.usec not delimited");
1328 if (!isdigit((unsigned char)*cp))
1329 SCREWUP("atime.sec not present");
1330 ull = strtoull(cp, &cp, 10);
1331 if (!cp || *cp++ != ' ')
1332 SCREWUP("atime.sec not delimited");
1333 if (TYPE_OVERFLOW(time_t, ull))
1334 setimes = 0; /* out of range */
1335 atime.tv_sec = ull;
1336 atime.tv_usec = strtol(cp, &cp, 10);
1337 if (!cp || *cp++ != '\0' || atime.tv_usec < 0 ||
1338 atime.tv_usec > 999999)
1339 SCREWUP("atime.usec not delimited");
1340 (void) atomicio(vwrite, remout, "", 1);
1341 continue;
1342 }
1343 if (*cp != 'C' && *cp != 'D') {
1344 /*
1345 * Check for the case "rcp remote:foo\* local:bar".
1346 * In this case, the line "No match." can be returned
1347 * by the shell before the rcp command on the remote is
1348 * executed so the ^Aerror_message convention isn't
1349 * followed.
1350 */
1351 if (first) {
1352 run_err("%s", cp);
1353 exit(1);
1354 }
1355 SCREWUP("expected control record");
1356 }
1357 mode = 0;
1358 for (++cp; cp < buf + 5; cp++) {
1359 if (*cp < '0' || *cp > '7')
1360 SCREWUP("bad mode");
1361 mode = (mode << 3) | (*cp - '0');
1362 }
1363 if (!pflag)
1364 mode &= ~mask;
1365 if (*cp++ != ' ')
1366 SCREWUP("mode not delimited");
1367
1368 if (!isdigit((unsigned char)*cp))
1369 SCREWUP("size not present");
1370 ull = strtoull(cp, &cp, 10);
1371 if (!cp || *cp++ != ' ')
1372 SCREWUP("size not delimited");
1373 if (TYPE_OVERFLOW(off_t, ull))
1374 SCREWUP("size out of range");
1375 size = (off_t)ull;
1376
1377 if (*cp == '\0' || strchr(cp, '/') != NULL ||
1378 strcmp(cp, ".") == 0 || strcmp(cp, "..") == 0) {
1379 run_err("error: unexpected filename: %s", cp);
1380 exit(1);
1381 }
1382 if (npatterns > 0) {
1383 for (n = 0; n < npatterns; n++) {
1384 if (fnmatch(patterns[n], cp, 0) == 0)
1385 break;
1386 }
1387 if (n >= npatterns)
1388 SCREWUP("filename does not match request");
1389 }
1390 if (targisdir) {
1391 static char *namebuf;
1392 static size_t cursize;
1393 size_t need;
1394
1395 need = strlen(targ) + strlen(cp) + 250;
1396 if (need > cursize) {
1397 free(namebuf);
1398 namebuf = xmalloc(need);
1399 cursize = need;
1400 }
1401 (void) snprintf(namebuf, need, "%s%s%s", targ,
1402 strcmp(targ, "/") ? "/" : "", cp);
1403 np = namebuf;
1404 } else
1405 np = targ;
1406 curfile = cp;
1407 exists = stat(np, &stb) == 0;
1408 if (buf[0] == 'D') {
1409 int mod_flag = pflag;
1410 if (!iamrecursive)
1411 SCREWUP("received directory without -r");
1412 if (exists) {
1413 if (!S_ISDIR(stb.st_mode)) {
1414 errno = ENOTDIR;
1415 goto bad;
1416 }
1417 if (pflag)
1418 (void) chmod(np, mode);
1419 } else {
1420 /* Handle copying from a read-only
1421 directory */
1422 mod_flag = 1;
1423 if (mkdir(np, mode | S_IRWXU) == -1)
1424 goto bad;
1425 }
1426 vect[0] = xstrdup(np);
1427 sink(1, vect, src);
1428 if (setimes) {
1429 setimes = 0;
1430 (void) utimes(vect[0], tv);
1431 }
1432 if (mod_flag)
1433 (void) chmod(vect[0], mode);
1434 free(vect[0]);
1435 continue;
1436 }
1437 omode = mode;
1438 mode |= S_IWUSR;
1439 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) == -1) {
1440 bad: run_err("%s: %s", np, strerror(errno));
1441 continue;
1442 }
1443 (void) atomicio(vwrite, remout, "", 1);
1444 if ((bp = allocbuf(&buffer, ofd, COPY_BUFLEN)) == NULL) {
1445 (void) close(ofd);
1446 continue;
1447 }
1448 cp = bp->buf;
1449 wrerr = 0;
1450
1451 /*
1452 * NB. do not use run_err() unless immediately followed by
1453 * exit() below as it may send a spurious reply that might
1454 * desyncronise us from the peer. Use note_err() instead.
1455 */
1456 statbytes = 0;
1457 if (showprogress)
1458 start_progress_meter(curfile, size, &statbytes);
1459 set_nonblock(remin);
1460 for (count = i = 0; i < size; i += bp->cnt) {
1461 amt = bp->cnt;
1462 if (i + amt > size)
1463 amt = size - i;
1464 count += amt;
1465 do {
1466 j = atomicio6(read, remin, cp, amt,
1467 scpio, &statbytes);
1468 if (j == 0) {
1469 run_err("%s", j != EPIPE ?
1470 strerror(errno) :
1471 "dropped connection");
1472 exit(1);
1473 }
1474 amt -= j;
1475 cp += j;
1476 } while (amt > 0);
1477
1478 if (count == bp->cnt) {
1479 /* Keep reading so we stay sync'd up. */
1480 if (!wrerr) {
1481 if (atomicio(vwrite, ofd, bp->buf,
1482 count) != count) {
1483 note_err("%s: %s", np,
1484 strerror(errno));
1485 wrerr = 1;
1486 }
1487 }
1488 count = 0;
1489 cp = bp->buf;
1490 }
1491 }
1492 unset_nonblock(remin);
1493 if (count != 0 && !wrerr &&
1494 atomicio(vwrite, ofd, bp->buf, count) != count) {
1495 note_err("%s: %s", np, strerror(errno));
1496 wrerr = 1;
1497 }
1498 if (!wrerr && (!exists || S_ISREG(stb.st_mode)) &&
1499 ftruncate(ofd, size) != 0)
1500 note_err("%s: truncate: %s", np, strerror(errno));
1501 if (pflag) {
1502 if (exists || omode != mode)
1503 #ifdef HAVE_FCHMOD
1504 if (fchmod(ofd, omode)) {
1505 #else /* HAVE_FCHMOD */
1506 if (chmod(np, omode)) {
1507 #endif /* HAVE_FCHMOD */
1508 note_err("%s: set mode: %s",
1509 np, strerror(errno));
1510 }
1511 } else {
1512 if (!exists && omode != mode)
1513 #ifdef HAVE_FCHMOD
1514 if (fchmod(ofd, omode & ~mask)) {
1515 #else /* HAVE_FCHMOD */
1516 if (chmod(np, omode & ~mask)) {
1517 #endif /* HAVE_FCHMOD */
1518 note_err("%s: set mode: %s",
1519 np, strerror(errno));
1520 }
1521 }
1522 if (close(ofd) == -1)
1523 note_err(np, "%s: close: %s", np, strerror(errno));
1524 (void) response();
1525 if (showprogress)
1526 stop_progress_meter();
1527 if (setimes && !wrerr) {
1528 setimes = 0;
1529 if (utimes(np, tv) == -1) {
1530 note_err("%s: set times: %s",
1531 np, strerror(errno));
1532 }
1533 }
1534 /* If no error was noted then signal success for this file */
1535 if (note_err(NULL) == 0)
1536 (void) atomicio(vwrite, remout, "", 1);
1537 }
1538 done:
1539 for (n = 0; n < npatterns; n++)
1540 free(patterns[n]);
1541 free(patterns);
1542 return;
1543 screwup:
1544 for (n = 0; n < npatterns; n++)
1545 free(patterns[n]);
1546 free(patterns);
1547 run_err("protocol error: %s", why);
1548 exit(1);
1549 }
1550
1551 int
1552 response(void)
1553 {
1554 char ch, *cp, resp, rbuf[2048], visbuf[2048];
1555
1556 if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp))
1557 lostconn(0);
1558
1559 cp = rbuf;
1560 switch (resp) {
1561 case 0: /* ok */
1562 return (0);
1563 default:
1564 *cp++ = resp;
1565 /* FALLTHROUGH */
1566 case 1: /* error, followed by error msg */
1567 case 2: /* fatal error, "" */
1568 do {
1569 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1570 lostconn(0);
1571 *cp++ = ch;
1572 } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
1573
1574 if (!iamremote) {
1575 cp[-1] = '\0';
1576 (void) snmprintf(visbuf, sizeof(visbuf),
1577 NULL, "%s\n", rbuf);
1578 (void) atomicio(vwrite, STDERR_FILENO,
1579 visbuf, strlen(visbuf));
1580 }
1581 ++errs;
1582 if (resp == 1)
1583 return (-1);
1584 exit(1);
1585 }
1586 /* NOTREACHED */
1587 }
1588
1589 void
1590 usage(void)
1591 {
1592 (void) fprintf(stderr,
1593 "usage: scp [-346BCpqrTv] [-c cipher] [-F ssh_config] [-i identity_file]\n"
1594 " [-J destination] [-l limit] [-o ssh_option] [-P port]\n"
1595 " [-S program] source ... target\n");
1596 exit(1);
1597 }
1598
1599 void
1600 run_err(const char *fmt,...)
1601 {
1602 static FILE *fp;
1603 va_list ap;
1604
1605 ++errs;
1606 if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) {
1607 (void) fprintf(fp, "%c", 0x01);
1608 (void) fprintf(fp, "scp: ");
1609 va_start(ap, fmt);
1610 (void) vfprintf(fp, fmt, ap);
1611 va_end(ap);
1612 (void) fprintf(fp, "\n");
1613 (void) fflush(fp);
1614 }
1615
1616 if (!iamremote) {
1617 va_start(ap, fmt);
1618 vfmprintf(stderr, fmt, ap);
1619 va_end(ap);
1620 fprintf(stderr, "\n");
1621 }
1622 }
1623
1624 /*
1625 * Notes a sink error for sending at the end of a file transfer. Returns 0 if
1626 * no error has been noted or -1 otherwise. Use note_err(NULL) to flush
1627 * any active error at the end of the transfer.
1628 */
1629 int
1630 note_err(const char *fmt, ...)
1631 {
1632 static char *emsg;
1633 va_list ap;
1634
1635 /* Replay any previously-noted error */
1636 if (fmt == NULL) {
1637 if (emsg == NULL)
1638 return 0;
1639 run_err("%s", emsg);
1640 free(emsg);
1641 emsg = NULL;
1642 return -1;
1643 }
1644
1645 errs++;
1646 /* Prefer first-noted error */
1647 if (emsg != NULL)
1648 return -1;
1649
1650 va_start(ap, fmt);
1651 vasnmprintf(&emsg, INT_MAX, NULL, fmt, ap);
1652 va_end(ap);
1653 return -1;
1654 }
1655
1656 void
1657 verifydir(char *cp)
1658 {
1659 struct stat stb;
1660
1661 if (!stat(cp, &stb)) {
1662 if (S_ISDIR(stb.st_mode))
1663 return;
1664 errno = ENOTDIR;
1665 }
1666 run_err("%s: %s", cp, strerror(errno));
1667 killchild(0);
1668 }
1669
1670 int
1671 okname(char *cp0)
1672 {
1673 int c;
1674 char *cp;
1675
1676 cp = cp0;
1677 do {
1678 c = (int)*cp;
1679 if (c & 0200)
1680 goto bad;
1681 if (!isalpha(c) && !isdigit((unsigned char)c)) {
1682 switch (c) {
1683 case '\'':
1684 case '"':
1685 case '`':
1686 case ' ':
1687 case '#':
1688 goto bad;
1689 default:
1690 break;
1691 }
1692 }
1693 } while (*++cp);
1694 return (1);
1695
1696 bad: fmprintf(stderr, "%s: invalid user name\n", cp0);
1697 return (0);
1698 }
1699
1700 BUF *
1701 allocbuf(BUF *bp, int fd, int blksize)
1702 {
1703 size_t size;
1704 #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
1705 struct stat stb;
1706
1707 if (fstat(fd, &stb) == -1) {
1708 run_err("fstat: %s", strerror(errno));
1709 return (0);
1710 }
1711 size = ROUNDUP(stb.st_blksize, blksize);
1712 if (size == 0)
1713 size = blksize;
1714 #else /* HAVE_STRUCT_STAT_ST_BLKSIZE */
1715 size = blksize;
1716 #endif /* HAVE_STRUCT_STAT_ST_BLKSIZE */
1717 if (bp->cnt >= size)
1718 return (bp);
1719 bp->buf = xrecallocarray(bp->buf, bp->cnt, size, 1);
1720 bp->cnt = size;
1721 return (bp);
1722 }
1723
1724 void
1725 lostconn(int signo)
1726 {
1727 if (!iamremote)
1728 (void)write(STDERR_FILENO, "lost connection\n", 16);
1729 if (signo)
1730 _exit(1);
1731 else
1732 exit(1);
1733 }
1734