1 /* $NetBSD: scp.c,v 1.42 2024/07/08 22:33:44 christos Exp $ */
2 /* $OpenBSD: scp.c,v 1.261 2024/06/26 23:14:14 deraadt Exp $ */
3
4 /*
5 * scp - secure remote copy. This is basically patched BSD rcp which
6 * uses ssh to do the data transfer (instead of using rcmd).
7 *
8 * NOTE: This version should NOT be suid root. (This uses ssh to
9 * do the transfer and ssh has the necessary privileges.)
10 *
11 * 1995 Timo Rinne <tri@iki.fi>, Tatu Ylonen <ylo@cs.hut.fi>
12 *
13 * As far as I am concerned, the code I have written for this software
14 * can be used freely for any purpose. Any derived versions of this
15 * software must be clearly marked as such, and if the derived work is
16 * incompatible with the protocol description in the RFC file, it must be
17 * called by a name other than "ssh" or "Secure Shell".
18 */
19 /*
20 * Copyright (c) 1999 Theo de Raadt. All rights reserved.
21 * Copyright (c) 1999 Aaron Campbell. All rights reserved.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the above copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 *
32 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
33 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
34 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
35 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
36 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
37 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
38 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
39 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
40 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
41 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
42 */
43
44 /*
45 * Parts from:
46 *
47 * Copyright (c) 1983, 1990, 1992, 1993, 1995
48 * The Regents of the University of California. All rights reserved.
49 *
50 * Redistribution and use in source and binary forms, with or without
51 * modification, are permitted provided that the following conditions
52 * are met:
53 * 1. Redistributions of source code must retain the above copyright
54 * notice, this list of conditions and the following disclaimer.
55 * 2. Redistributions in binary form must reproduce the above copyright
56 * notice, this list of conditions and the following disclaimer in the
57 * documentation and/or other materials provided with the distribution.
58 * 3. Neither the name of the University nor the names of its contributors
59 * may be used to endorse or promote products derived from this software
60 * without specific prior written permission.
61 *
62 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
63 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
64 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
65 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
66 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
67 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
68 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
69 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
70 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
71 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
72 * SUCH DAMAGE.
73 *
74 */
75
76 #include "includes.h"
77 __RCSID("$NetBSD: scp.c,v 1.42 2024/07/08 22:33:44 christos Exp $");
78
79 #include <sys/param.h> /* roundup MAX */
80 #include <sys/types.h>
81 #include <sys/poll.h>
82 #include <sys/wait.h>
83 #include <sys/stat.h>
84 #include <sys/time.h>
85 #include <sys/uio.h>
86
87 #include <ctype.h>
88 #include <dirent.h>
89 #include <errno.h>
90 #include <fcntl.h>
91 #include <fnmatch.h>
92 #include <glob.h>
93 #include <libgen.h>
94 #include <locale.h>
95 #include <pwd.h>
96 #include <signal.h>
97 #include <stdarg.h>
98 #include <stdint.h>
99 #include <stdio.h>
100 #include <stdlib.h>
101 #include <string.h>
102 #include <time.h>
103 #include <unistd.h>
104 #include <limits.h>
105 #include <util.h>
106 #include <vis.h>
107
108 #include "xmalloc.h"
109 #include "ssh.h"
110 #include "atomicio.h"
111 #include "pathnames.h"
112 #include "log.h"
113 #include "misc.h"
114 #include "progressmeter.h"
115 #include "utf8.h"
116 #include "sftp.h"
117 #include "fmt_scaled.h"
118
119 #include "sftp-common.h"
120 #include "sftp-client.h"
121
122 #define COPY_BUFLEN 16384
123
124 int do_cmd(const char *, const char *, const char *, int, int, const char *, int *, int *, pid_t *);
125 int do_cmd2(char *, char *, int, char *, int, int);
126
127 static char empty[] = "";
128
129 /* Struct for addargs */
130 arglist args;
131 arglist remote_remote_args;
132
133 /* Bandwidth limit */
134 long long limit_kbps = 0;
135 struct bwlimit bwlimit;
136
137 /* Name of current file being transferred. */
138 char *curfile;
139
140 /* This is set to non-zero to enable verbose mode. */
141 int verbose_mode = 0;
142 LogLevel log_level = SYSLOG_LEVEL_INFO;
143
144 /* This is set to zero if the progressmeter is not desired. */
145 int showprogress = 1;
146
147 /*
148 * This is set to non-zero if remote-remote copy should be piped
149 * through this process.
150 */
151 int throughlocal = 1;
152
153 /* Non-standard port to use for the ssh connection or -1. */
154 int sshport = -1;
155
156 /* This is the program to execute for the secured connection. ("ssh" or -S) */
157 #ifdef RESCUEDIR
158 const char *ssh_program = RESCUEDIR "/ssh";
159 #else
160 const char *ssh_program = _PATH_SSH_PROGRAM;
161 #endif
162
163 /* This is used to store the pid of ssh_program */
164 pid_t do_cmd_pid = -1;
165 pid_t do_cmd_pid2 = -1;
166
167 /* SFTP copy parameters */
168 size_t sftp_copy_buflen;
169 size_t sftp_nrequests;
170
171 /* Needed for sftp */
172 volatile sig_atomic_t interrupted = 0;
173
174 int sftp_glob(struct sftp_conn *, const char *, int,
175 int (*)(const char *, int), glob_t *); /* proto for sftp-glob.c */
176
177 __dead static void
killchild(int signo)178 killchild(int signo)
179 {
180 if (do_cmd_pid > 1) {
181 kill(do_cmd_pid, signo ? signo : SIGTERM);
182 (void)waitpid(do_cmd_pid, NULL, 0);
183 }
184 if (do_cmd_pid2 > 1) {
185 kill(do_cmd_pid2, signo ? signo : SIGTERM);
186 (void)waitpid(do_cmd_pid2, NULL, 0);
187 }
188
189 if (signo)
190 _exit(1);
191 exit(1);
192 }
193
194 static void
suspone(int pid,int signo)195 suspone(int pid, int signo)
196 {
197 int status;
198
199 if (pid > 1) {
200 kill(pid, signo);
201 while (waitpid(pid, &status, WUNTRACED) == -1 &&
202 errno == EINTR)
203 ;
204 }
205 }
206
207 static void
suspchild(int signo)208 suspchild(int signo)
209 {
210 int save_errno = errno;
211 suspone(do_cmd_pid, signo);
212 suspone(do_cmd_pid2, signo);
213 kill(getpid(), SIGSTOP);
214 errno = save_errno;
215 }
216
217 static int
do_local_cmd(arglist * a)218 do_local_cmd(arglist *a)
219 {
220 u_int i;
221 int status;
222 pid_t pid;
223
224 if (a->num == 0)
225 fatal("do_local_cmd: no arguments");
226
227 if (verbose_mode) {
228 fprintf(stderr, "Executing:");
229 for (i = 0; i < a->num; i++)
230 fmprintf(stderr, " %s", a->list[i]);
231 fprintf(stderr, "\n");
232 }
233 if ((pid = fork()) == -1)
234 fatal("do_local_cmd: fork: %s", strerror(errno));
235
236 if (pid == 0) {
237 execvp(a->list[0], a->list);
238 perror(a->list[0]);
239 exit(1);
240 }
241
242 do_cmd_pid = pid;
243 ssh_signal(SIGTERM, killchild);
244 ssh_signal(SIGINT, killchild);
245 ssh_signal(SIGHUP, killchild);
246
247 while (waitpid(pid, &status, 0) == -1)
248 if (errno != EINTR)
249 fatal("do_local_cmd: waitpid: %s", strerror(errno));
250
251 do_cmd_pid = -1;
252
253 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
254 return (-1);
255
256 return (0);
257 }
258
259 /*
260 * This function executes the given command as the specified user on the
261 * given host. This returns < 0 if execution fails, and >= 0 otherwise. This
262 * assigns the input and output file descriptors on success.
263 */
264
265 int
do_cmd(const char * program,const char * host,const char * remuser,int port,int subsystem,const char * cmd,int * fdin,int * fdout,pid_t * pid)266 do_cmd(const char *program, const char *host, const char *remuser, int port, int subsystem,
267 const char *cmd, int *fdin, int *fdout, pid_t *pid)
268 {
269 int sv[2];
270
271 if (verbose_mode)
272 fmprintf(stderr,
273 "Executing: program %s host %s, user %s, command %s\n",
274 program, host,
275 remuser ? remuser : "(unspecified)", cmd);
276
277 if (port == -1)
278 port = sshport;
279
280 /* Create a socket pair for communicating with ssh. */
281 if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv) == -1)
282 fatal("socketpair: %s", strerror(errno));
283
284 ssh_signal(SIGTSTP, suspchild);
285 ssh_signal(SIGTTIN, suspchild);
286 ssh_signal(SIGTTOU, suspchild);
287
288 /* Fork a child to execute the command on the remote host using ssh. */
289 *pid = fork();
290 switch (*pid) {
291 case -1:
292 fatal("fork: %s", strerror(errno));
293 case 0:
294 /* Child. */
295 if (dup2(sv[0], STDIN_FILENO) == -1 ||
296 dup2(sv[0], STDOUT_FILENO) == -1) {
297 perror("dup2");
298 _exit(1);
299 }
300 close(sv[0]);
301 close(sv[1]);
302 replacearg(&args, 0, "%s", program);
303 if (port != -1) {
304 addargs(&args, "-p");
305 addargs(&args, "%d", port);
306 }
307 if (remuser != NULL) {
308 addargs(&args, "-l");
309 addargs(&args, "%s", remuser);
310 }
311 if (subsystem)
312 addargs(&args, "-s");
313 addargs(&args, "--");
314 addargs(&args, "%s", host);
315 addargs(&args, "%s", cmd);
316
317 execvp(program, args.list);
318 perror(program);
319 _exit(1);
320 default:
321 /* Parent. Close the other side, and return the local side. */
322 close(sv[0]);
323 *fdin = sv[1];
324 *fdout = sv[1];
325 ssh_signal(SIGTERM, killchild);
326 ssh_signal(SIGINT, killchild);
327 ssh_signal(SIGHUP, killchild);
328 return 0;
329 }
330 }
331
332 /*
333 * This function executes a command similar to do_cmd(), but expects the
334 * input and output descriptors to be setup by a previous call to do_cmd().
335 * This way the input and output of two commands can be connected.
336 */
337 int
do_cmd2(char * host,char * remuser,int port,char * cmd,int fdin,int fdout)338 do_cmd2(char *host, char *remuser, int port, char *cmd,
339 int fdin, int fdout)
340 {
341 int status;
342 pid_t pid;
343
344 if (verbose_mode)
345 fmprintf(stderr,
346 "Executing: 2nd program %s host %s, user %s, command %s\n",
347 ssh_program, host,
348 remuser ? remuser : "(unspecified)", cmd);
349
350 if (port == -1)
351 port = sshport;
352
353 /* Fork a child to execute the command on the remote host using ssh. */
354 pid = fork();
355 if (pid == 0) {
356 if (dup2(fdin, 0) == -1)
357 perror("dup2");
358 if (dup2(fdout, 1) == -1)
359 perror("dup2");
360
361 replacearg(&args, 0, "%s", ssh_program);
362 if (port != -1) {
363 addargs(&args, "-p");
364 addargs(&args, "%d", port);
365 }
366 if (remuser != NULL) {
367 addargs(&args, "-l");
368 addargs(&args, "%s", remuser);
369 }
370 addargs(&args, "-oBatchMode=yes");
371 addargs(&args, "--");
372 addargs(&args, "%s", host);
373 addargs(&args, "%s", cmd);
374
375 execvp(ssh_program, args.list);
376 perror(ssh_program);
377 exit(1);
378 } else if (pid == -1) {
379 fatal("fork: %s", strerror(errno));
380 }
381 while (waitpid(pid, &status, 0) == -1)
382 if (errno != EINTR)
383 fatal("do_cmd2: waitpid: %s", strerror(errno));
384 return 0;
385 }
386
387 typedef struct {
388 size_t cnt;
389 char *buf;
390 } BUF;
391
392 BUF *allocbuf(BUF *, int, int);
393 __dead static void lostconn(int);
394 int okname(char *);
395 void run_err(const char *,...)
396 __attribute__((__format__ (printf, 1, 2)))
397 __attribute__((__nonnull__ (1)));
398 int note_err(const char *,...)
399 __attribute__((__format__ (printf, 1, 2)));
400 void verifydir(char *);
401
402 struct passwd *pwd;
403 uid_t userid;
404 int errs, remin, remout, remin2, remout2;
405 int Tflag, pflag, iamremote, iamrecursive, targetshouldbedirectory;
406
407 #define CMDNEEDS 64
408 char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
409
410 enum scp_mode_e {
411 MODE_SCP,
412 MODE_SFTP
413 };
414
415 int response(void);
416 void rsource(char *, struct stat *);
417 void sink(int, char *[], const char *);
418 void source(int, char *[]);
419 static void tolocal(int, char *[], enum scp_mode_e, char *sftp_direct);
420 static void toremote(int, char *[], enum scp_mode_e, char *sftp_direct);
421 __dead static void usage(void);
422
423 void source_sftp(int, char *, char *, struct sftp_conn *);
424 void sink_sftp(int, char *, const char *, struct sftp_conn *);
425 void throughlocal_sftp(struct sftp_conn *, struct sftp_conn *,
426 char *, char *);
427
428 int
main(int argc,char ** argv)429 main(int argc, char **argv)
430 {
431 int ch, fflag, tflag, status, r, n;
432 char **newargv, *argv0;
433 const char *errstr;
434 extern char *optarg;
435 extern int optind;
436 enum scp_mode_e mode = MODE_SFTP;
437 char *sftp_direct = NULL;
438 long long llv;
439
440 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
441 sanitise_stdfd();
442
443 setlocale(LC_CTYPE, "");
444
445 /* Copy argv, because we modify it */
446 argv0 = argv[0];
447 newargv = xcalloc(MAXIMUM(argc + 1, 1), sizeof(*newargv));
448 for (n = 0; n < argc; n++)
449 newargv[n] = xstrdup(argv[n]);
450 argv = newargv;
451
452 log_init(argv0, log_level, SYSLOG_FACILITY_USER, 2);
453
454 memset(&args, '\0', sizeof(args));
455 memset(&remote_remote_args, '\0', sizeof(remote_remote_args));
456 args.list = remote_remote_args.list = NULL;
457 addargs(&args, "%s", ssh_program);
458 addargs(&args, "-x");
459 addargs(&args, "-oPermitLocalCommand=no");
460 addargs(&args, "-oClearAllForwardings=yes");
461 addargs(&args, "-oRemoteCommand=none");
462 addargs(&args, "-oRequestTTY=no");
463
464 fflag = Tflag = tflag = 0;
465 while ((ch = getopt(argc, argv,
466 "12346ABCTdfOpqRrstvD:F:J:M:P:S:c:i:l:o:X:")) != -1) {
467 switch (ch) {
468 /* User-visible flags. */
469 case '1':
470 fatal("SSH protocol v.1 is no longer supported");
471 break;
472 case '2':
473 /* Ignored */
474 break;
475 case 'A':
476 case '4':
477 case '6':
478 case 'C':
479 addargs(&args, "-%c", ch);
480 addargs(&remote_remote_args, "-%c", ch);
481 break;
482 case 'D':
483 sftp_direct = optarg;
484 break;
485 case '3':
486 throughlocal = 1;
487 break;
488 case 'R':
489 throughlocal = 0;
490 break;
491 case 'o':
492 case 'c':
493 case 'i':
494 case 'F':
495 case 'J':
496 addargs(&remote_remote_args, "-%c", ch);
497 addargs(&remote_remote_args, "%s", optarg);
498 addargs(&args, "-%c", ch);
499 addargs(&args, "%s", optarg);
500 break;
501 case 'O':
502 mode = MODE_SCP;
503 break;
504 case 's':
505 mode = MODE_SFTP;
506 break;
507 case 'P':
508 sshport = a2port(optarg);
509 if (sshport <= 0)
510 fatal("bad port \"%s\"\n", optarg);
511 break;
512 case 'B':
513 addargs(&remote_remote_args, "-oBatchmode=yes");
514 addargs(&args, "-oBatchmode=yes");
515 break;
516 case 'l':
517 limit_kbps = strtonum(optarg, 1, 100 * 1024 * 1024,
518 &errstr);
519 if (errstr != NULL)
520 usage();
521 limit_kbps *= 1024; /* kbps */
522 bandwidth_limit_init(&bwlimit, limit_kbps, COPY_BUFLEN);
523 break;
524 case 'p':
525 pflag = 1;
526 break;
527 case 'r':
528 iamrecursive = 1;
529 break;
530 case 'S':
531 ssh_program = xstrdup(optarg);
532 break;
533 case 'v':
534 addargs(&args, "-v");
535 addargs(&remote_remote_args, "-v");
536 if (verbose_mode == 0)
537 log_level = SYSLOG_LEVEL_DEBUG1;
538 else if (log_level < SYSLOG_LEVEL_DEBUG3)
539 log_level++;
540 verbose_mode = 1;
541 break;
542 case 'q':
543 addargs(&args, "-q");
544 addargs(&remote_remote_args, "-q");
545 showprogress = 0;
546 break;
547 case 'X':
548 /* Please keep in sync with sftp.c -X */
549 if (strncmp(optarg, "buffer=", 7) == 0) {
550 r = scan_scaled(optarg + 7, &llv);
551 if (r == 0 && (llv <= 0 || llv > 256 * 1024)) {
552 r = -1;
553 errno = EINVAL;
554 }
555 if (r == -1) {
556 fatal("Invalid buffer size \"%s\": %s",
557 optarg + 7, strerror(errno));
558 }
559 sftp_copy_buflen = (size_t)llv;
560 } else if (strncmp(optarg, "nrequests=", 10) == 0) {
561 llv = strtonum(optarg + 10, 1, 256 * 1024,
562 &errstr);
563 if (errstr != NULL) {
564 fatal("Invalid number of requests "
565 "\"%s\": %s", optarg + 10, errstr);
566 }
567 sftp_nrequests = (size_t)llv;
568 } else {
569 fatal("Invalid -X option");
570 }
571 break;
572
573 /* Server options. */
574 case 'd':
575 targetshouldbedirectory = 1;
576 break;
577 case 'f': /* "from" */
578 iamremote = 1;
579 fflag = 1;
580 break;
581 case 't': /* "to" */
582 iamremote = 1;
583 tflag = 1;
584 break;
585 case 'T':
586 Tflag = 1;
587 break;
588 default:
589 usage();
590 }
591 }
592 argc -= optind;
593 argv += optind;
594
595 log_init(argv0, log_level, SYSLOG_FACILITY_USER, 2);
596
597 /* Do this last because we want the user to be able to override it */
598 addargs(&args, "-oForwardAgent=no");
599
600 if (iamremote)
601 mode = MODE_SCP;
602
603 if ((pwd = getpwuid(userid = getuid())) == NULL)
604 fatal("unknown user %u", (u_int) userid);
605
606 if (!isatty(STDOUT_FILENO))
607 showprogress = 0;
608
609 if (pflag) {
610 /* Cannot pledge: -p allows setuid/setgid files... */
611 } else {
612 #ifdef __OpenBSD__
613 if (pledge("stdio rpath wpath cpath fattr tty proc exec",
614 NULL) == -1) {
615 perror("pledge");
616 exit(1);
617 }
618 #endif
619 }
620
621 remin = STDIN_FILENO;
622 remout = STDOUT_FILENO;
623
624 if (fflag) {
625 /* Follow "protocol", send data. */
626 (void) response();
627 source(argc, argv);
628 exit(errs != 0);
629 }
630 if (tflag) {
631 /* Receive data. */
632 sink(argc, argv, NULL);
633 exit(errs != 0);
634 }
635 if (argc < 2)
636 usage();
637 if (argc > 2)
638 targetshouldbedirectory = 1;
639
640 remin = remout = -1;
641 do_cmd_pid = -1;
642 /* Command to be executed on remote system using "ssh". */
643 (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
644 verbose_mode ? " -v" : "",
645 iamrecursive ? " -r" : "", pflag ? " -p" : "",
646 targetshouldbedirectory ? " -d" : "");
647
648 (void) ssh_signal(SIGPIPE, lostconn);
649
650 if (colon(argv[argc - 1])) /* Dest is remote host. */
651 toremote(argc, argv, mode, sftp_direct);
652 else {
653 if (targetshouldbedirectory)
654 verifydir(argv[argc - 1]);
655 tolocal(argc, argv, mode, sftp_direct); /* Dest is local host. */
656 }
657 /*
658 * Finally check the exit status of the ssh process, if one was forked
659 * and no error has occurred yet
660 */
661 if (do_cmd_pid != -1 && (mode == MODE_SFTP || errs == 0)) {
662 if (remin != -1)
663 (void) close(remin);
664 if (remout != -1)
665 (void) close(remout);
666 if (waitpid(do_cmd_pid, &status, 0) == -1)
667 errs = 1;
668 else {
669 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
670 errs = 1;
671 }
672 }
673 exit(errs != 0);
674 }
675
676 /* Callback from atomicio6 to update progress meter and limit bandwidth */
677 static int
scpio(void * _cnt,size_t s)678 scpio(void *_cnt, size_t s)
679 {
680 off_t *cnt = (off_t *)_cnt;
681
682 *cnt += s;
683 refresh_progress_meter(0);
684 if (limit_kbps > 0)
685 bandwidth_limit(&bwlimit, s);
686 return 0;
687 }
688
689 static int
do_times(int fd,int verb,const struct stat * sb)690 do_times(int fd, int verb, const struct stat *sb)
691 {
692 /* strlen(2^64) == 20; strlen(10^6) == 7 */
693 char buf[(20 + 7 + 2) * 2 + 2];
694
695 (void)snprintf(buf, sizeof(buf), "T%llu 0 %llu 0\n",
696 (unsigned long long) (sb->st_mtime < 0 ? 0 : sb->st_mtime),
697 (unsigned long long) (sb->st_atime < 0 ? 0 : sb->st_atime));
698 if (verb) {
699 fprintf(stderr, "File mtime %lld atime %lld\n",
700 (long long)sb->st_mtime, (long long)sb->st_atime);
701 fprintf(stderr, "Sending file timestamps: %s", buf);
702 }
703 (void) atomicio(vwrite, fd, buf, strlen(buf));
704 return (response());
705 }
706
707 static int
parse_scp_uri(const char * uri,char ** userp,char ** hostp,int * portp,char ** pathp)708 parse_scp_uri(const char *uri, char **userp, char **hostp, int *portp,
709 char **pathp)
710 {
711 int r;
712
713 r = parse_uri("scp", uri, userp, hostp, portp, pathp);
714 if (r == 0 && *pathp == NULL)
715 *pathp = xstrdup(".");
716 return r;
717 }
718
719 /* Appends a string to an array; returns 0 on success, -1 on alloc failure */
720 static int
append(char * cp,char *** ap,size_t * np)721 append(char *cp, char ***ap, size_t *np)
722 {
723 char **tmp;
724
725 if ((tmp = reallocarray(*ap, *np + 1, sizeof(*tmp))) == NULL)
726 return -1;
727 tmp[(*np)] = cp;
728 (*np)++;
729 *ap = tmp;
730 return 0;
731 }
732
733 /*
734 * Finds the start and end of the first brace pair in the pattern.
735 * returns 0 on success or -1 for invalid patterns.
736 */
737 static int
find_brace(const char * pattern,int * startp,int * endp)738 find_brace(const char *pattern, int *startp, int *endp)
739 {
740 int i;
741 int in_bracket, brace_level;
742
743 *startp = *endp = -1;
744 in_bracket = brace_level = 0;
745 for (i = 0; i < INT_MAX && *endp < 0 && pattern[i] != '\0'; i++) {
746 switch (pattern[i]) {
747 case '\\':
748 /* skip next character */
749 if (pattern[i + 1] != '\0')
750 i++;
751 break;
752 case '[':
753 in_bracket = 1;
754 break;
755 case ']':
756 in_bracket = 0;
757 break;
758 case '{':
759 if (in_bracket)
760 break;
761 if (pattern[i + 1] == '}') {
762 /* Protect a single {}, for find(1), like csh */
763 i++; /* skip */
764 break;
765 }
766 if (*startp == -1)
767 *startp = i;
768 brace_level++;
769 break;
770 case '}':
771 if (in_bracket)
772 break;
773 if (*startp < 0) {
774 /* Unbalanced brace */
775 return -1;
776 }
777 if (--brace_level <= 0)
778 *endp = i;
779 break;
780 }
781 }
782 /* unbalanced brackets/braces */
783 if (*endp < 0 && (*startp >= 0 || in_bracket))
784 return -1;
785 return 0;
786 }
787
788 /*
789 * Assembles and records a successfully-expanded pattern, returns -1 on
790 * alloc failure.
791 */
792 static int
emit_expansion(const char * pattern,int brace_start,int brace_end,int sel_start,int sel_end,char *** patternsp,size_t * npatternsp)793 emit_expansion(const char *pattern, int brace_start, int brace_end,
794 int sel_start, int sel_end, char ***patternsp, size_t *npatternsp)
795 {
796 char *cp;
797 size_t pattern_len;
798 int o = 0, tail_len;
799
800 if ((pattern_len = strlen(pattern)) == 0 || pattern_len >= INT_MAX)
801 return -1;
802
803 tail_len = strlen(pattern + brace_end + 1);
804 if ((cp = malloc(brace_start + (sel_end - sel_start) +
805 tail_len + 1)) == NULL)
806 return -1;
807
808 /* Pattern before initial brace */
809 if (brace_start > 0) {
810 memcpy(cp, pattern, brace_start);
811 o = brace_start;
812 }
813 /* Current braced selection */
814 if (sel_end - sel_start > 0) {
815 memcpy(cp + o, pattern + sel_start,
816 sel_end - sel_start);
817 o += sel_end - sel_start;
818 }
819 /* Remainder of pattern after closing brace */
820 if (tail_len > 0) {
821 memcpy(cp + o, pattern + brace_end + 1, tail_len);
822 o += tail_len;
823 }
824 cp[o] = '\0';
825 if (append(cp, patternsp, npatternsp) != 0) {
826 free(cp);
827 return -1;
828 }
829 return 0;
830 }
831
832 /*
833 * Expand the first encountered brace in pattern, appending the expanded
834 * patterns it yielded to the *patternsp array.
835 *
836 * Returns 0 on success or -1 on allocation failure.
837 *
838 * Signals whether expansion was performed via *expanded and whether
839 * pattern was invalid via *invalid.
840 */
841 static int
brace_expand_one(const char * pattern,char *** patternsp,size_t * npatternsp,int * expanded,int * invalid)842 brace_expand_one(const char *pattern, char ***patternsp, size_t *npatternsp,
843 int *expanded, int *invalid)
844 {
845 int i;
846 int in_bracket, brace_start, brace_end, brace_level;
847 int sel_start, sel_end;
848
849 *invalid = *expanded = 0;
850
851 if (find_brace(pattern, &brace_start, &brace_end) != 0) {
852 *invalid = 1;
853 return 0;
854 } else if (brace_start == -1)
855 return 0;
856
857 in_bracket = brace_level = 0;
858 for (i = sel_start = brace_start + 1; i < brace_end; i++) {
859 switch (pattern[i]) {
860 case '{':
861 if (in_bracket)
862 break;
863 brace_level++;
864 break;
865 case '}':
866 if (in_bracket)
867 break;
868 brace_level--;
869 break;
870 case '[':
871 in_bracket = 1;
872 break;
873 case ']':
874 in_bracket = 0;
875 break;
876 case '\\':
877 if (i < brace_end - 1)
878 i++; /* skip */
879 break;
880 }
881 if (pattern[i] == ',' || i == brace_end - 1) {
882 if (in_bracket || brace_level > 0)
883 continue;
884 /* End of a selection, emit an expanded pattern */
885
886 /* Adjust end index for last selection */
887 sel_end = (i == brace_end - 1) ? brace_end : i;
888 if (emit_expansion(pattern, brace_start, brace_end,
889 sel_start, sel_end, patternsp, npatternsp) != 0)
890 return -1;
891 /* move on to the next selection */
892 sel_start = i + 1;
893 continue;
894 }
895 }
896 if (in_bracket || brace_level > 0) {
897 *invalid = 1;
898 return 0;
899 }
900 /* success */
901 *expanded = 1;
902 return 0;
903 }
904
905 /* Expand braces from pattern. Returns 0 on success, -1 on failure */
906 static int
brace_expand(const char * pattern,char *** patternsp,size_t * npatternsp)907 brace_expand(const char *pattern, char ***patternsp, size_t *npatternsp)
908 {
909 char *cp, *cp2, **active = NULL, **done = NULL;
910 size_t i, nactive = 0, ndone = 0;
911 int ret = -1, invalid = 0, expanded = 0;
912
913 *patternsp = NULL;
914 *npatternsp = 0;
915
916 /* Start the worklist with the original pattern */
917 if ((cp = strdup(pattern)) == NULL)
918 return -1;
919 if (append(cp, &active, &nactive) != 0) {
920 free(cp);
921 return -1;
922 }
923 while (nactive > 0) {
924 cp = active[nactive - 1];
925 nactive--;
926 if (brace_expand_one(cp, &active, &nactive,
927 &expanded, &invalid) == -1) {
928 free(cp);
929 goto fail;
930 }
931 if (invalid)
932 fatal_f("invalid brace pattern \"%s\"", cp);
933 if (expanded) {
934 /*
935 * Current entry expanded to new entries on the
936 * active list; discard the progenitor pattern.
937 */
938 free(cp);
939 continue;
940 }
941 /*
942 * Pattern did not expand; append the finename component to
943 * the completed list
944 */
945 if ((cp2 = strrchr(cp, '/')) != NULL)
946 *cp2++ = '\0';
947 else
948 cp2 = cp;
949 if (append(xstrdup(cp2), &done, &ndone) != 0) {
950 free(cp);
951 goto fail;
952 }
953 free(cp);
954 }
955 /* success */
956 *patternsp = done;
957 *npatternsp = ndone;
958 done = NULL;
959 ndone = 0;
960 ret = 0;
961 fail:
962 for (i = 0; i < nactive; i++)
963 free(active[i]);
964 free(active);
965 for (i = 0; i < ndone; i++)
966 free(done[i]);
967 free(done);
968 return ret;
969 }
970
971 static struct sftp_conn *
do_sftp_connect(char * host,char * user,int port,char * sftp_direct,int * reminp,int * remoutp,int * pidp)972 do_sftp_connect(char *host, char *user, int port, char *sftp_direct,
973 int *reminp, int *remoutp, int *pidp)
974 {
975 if (sftp_direct == NULL) {
976 if (do_cmd(ssh_program, host, user, port, 1, "sftp",
977 reminp, remoutp, pidp) < 0)
978 return NULL;
979
980 } else {
981 freeargs(&args);
982 addargs(&args, "sftp-server");
983 if (do_cmd(sftp_direct, host, NULL, -1, 0, "sftp",
984 reminp, remoutp, pidp) < 0)
985 return NULL;
986 }
987 return sftp_init(*reminp, *remoutp,
988 sftp_copy_buflen, sftp_nrequests, limit_kbps);
989 }
990
991 static void
toremote(int argc,char ** argv,enum scp_mode_e mode,char * sftp_direct)992 toremote(int argc, char **argv, enum scp_mode_e mode, char *sftp_direct)
993 {
994 char *suser = NULL, *host = NULL, *src = NULL;
995 char *bp, *tuser, *thost, *targ;
996 int sport = -1, tport = -1;
997 struct sftp_conn *conn = NULL, *conn2 = NULL;
998 arglist alist;
999 int i, r, status;
1000 struct stat sb;
1001 u_int j;
1002
1003 memset(&alist, '\0', sizeof(alist));
1004 alist.list = NULL;
1005
1006 /* Parse target */
1007 r = parse_scp_uri(argv[argc - 1], &tuser, &thost, &tport, &targ);
1008 if (r == -1) {
1009 fmprintf(stderr, "%s: invalid uri\n", argv[argc - 1]);
1010 ++errs;
1011 goto out;
1012 }
1013 if (r != 0) {
1014 if (parse_user_host_path(argv[argc - 1], &tuser, &thost,
1015 &targ) == -1) {
1016 fmprintf(stderr, "%s: invalid target\n", argv[argc - 1]);
1017 ++errs;
1018 goto out;
1019 }
1020 }
1021
1022 /* Parse source files */
1023 for (i = 0; i < argc - 1; i++) {
1024 free(suser);
1025 free(host);
1026 free(src);
1027 r = parse_scp_uri(argv[i], &suser, &host, &sport, &src);
1028 if (r == -1) {
1029 fmprintf(stderr, "%s: invalid uri\n", argv[i]);
1030 ++errs;
1031 continue;
1032 }
1033 if (r != 0) {
1034 parse_user_host_path(argv[i], &suser, &host, &src);
1035 }
1036 if (suser != NULL && !okname(suser)) {
1037 ++errs;
1038 continue;
1039 }
1040 if (host && throughlocal) { /* extended remote to remote */
1041 if (mode == MODE_SFTP) {
1042 if (remin == -1) {
1043 /* Connect to dest now */
1044 conn = do_sftp_connect(thost, tuser,
1045 tport, sftp_direct,
1046 &remin, &remout, &do_cmd_pid);
1047 if (conn == NULL) {
1048 fatal("Unable to open "
1049 "destination connection");
1050 }
1051 debug3_f("origin in %d out %d pid %ld",
1052 remin, remout, (long)do_cmd_pid);
1053 }
1054 /*
1055 * XXX remember suser/host/sport and only
1056 * reconnect if they change between arguments.
1057 * would save reconnections for cases like
1058 * scp -3 hosta:/foo hosta:/bar hostb:
1059 */
1060 /* Connect to origin now */
1061 conn2 = do_sftp_connect(host, suser,
1062 sport, sftp_direct,
1063 &remin2, &remout2, &do_cmd_pid2);
1064 if (conn2 == NULL) {
1065 fatal("Unable to open "
1066 "source connection");
1067 }
1068 debug3_f("destination in %d out %d pid %ld",
1069 remin2, remout2, (long)do_cmd_pid2);
1070 throughlocal_sftp(conn2, conn, src, targ);
1071 (void) close(remin2);
1072 (void) close(remout2);
1073 remin2 = remout2 = -1;
1074 if (waitpid(do_cmd_pid2, &status, 0) == -1)
1075 ++errs;
1076 else if (!WIFEXITED(status) ||
1077 WEXITSTATUS(status) != 0)
1078 ++errs;
1079 do_cmd_pid2 = -1;
1080 continue;
1081 } else {
1082 xasprintf(&bp, "%s -f %s%s", cmd,
1083 *src == '-' ? "-- " : "", src);
1084 if (do_cmd(ssh_program, host, suser, sport, 0,
1085 bp, &remin, &remout, &do_cmd_pid) < 0)
1086 exit(1);
1087 free(bp);
1088 xasprintf(&bp, "%s -t %s%s", cmd,
1089 *targ == '-' ? "-- " : "", targ);
1090 if (do_cmd2(thost, tuser, tport, bp,
1091 remin, remout) < 0)
1092 exit(1);
1093 free(bp);
1094 (void) close(remin);
1095 (void) close(remout);
1096 remin = remout = -1;
1097 }
1098 } else if (host) { /* standard remote to remote */
1099 /*
1100 * Second remote user is passed to first remote side
1101 * via scp command-line. Ensure it contains no obvious
1102 * shell characters.
1103 */
1104 if (tuser != NULL && !okname(tuser)) {
1105 ++errs;
1106 continue;
1107 }
1108 if (tport != -1 && tport != SSH_DEFAULT_PORT) {
1109 /* This would require the remote support URIs */
1110 fatal("target port not supported with two "
1111 "remote hosts and the -R option");
1112 }
1113
1114 freeargs(&alist);
1115 addargs(&alist, "%s", ssh_program);
1116 addargs(&alist, "-x");
1117 addargs(&alist, "-oClearAllForwardings=yes");
1118 addargs(&alist, "-n");
1119 for (j = 0; j < remote_remote_args.num; j++) {
1120 addargs(&alist, "%s",
1121 remote_remote_args.list[j]);
1122 }
1123
1124 if (sport != -1) {
1125 addargs(&alist, "-p");
1126 addargs(&alist, "%d", sport);
1127 }
1128 if (suser) {
1129 addargs(&alist, "-l");
1130 addargs(&alist, "%s", suser);
1131 }
1132 addargs(&alist, "--");
1133 addargs(&alist, "%s", host);
1134 addargs(&alist, "%s", cmd);
1135 addargs(&alist, "%s", src);
1136 addargs(&alist, "%s%s%s:%s",
1137 tuser ? tuser : "", tuser ? "@" : "",
1138 thost, targ);
1139 if (do_local_cmd(&alist) != 0)
1140 errs = 1;
1141 } else { /* local to remote */
1142 if (mode == MODE_SFTP) {
1143 /* no need to glob: already done by shell */
1144 if (stat(argv[i], &sb) != 0) {
1145 fatal("stat local \"%s\": %s", argv[i],
1146 strerror(errno));
1147 }
1148 if (remin == -1) {
1149 /* Connect to remote now */
1150 conn = do_sftp_connect(thost, tuser,
1151 tport, sftp_direct,
1152 &remin, &remout, &do_cmd_pid);
1153 if (conn == NULL) {
1154 fatal("Unable to open sftp "
1155 "connection");
1156 }
1157 }
1158
1159 /* The protocol */
1160 source_sftp(1, argv[i], targ, conn);
1161 continue;
1162 }
1163 /* SCP */
1164 if (remin == -1) {
1165 xasprintf(&bp, "%s -t %s%s", cmd,
1166 *targ == '-' ? "-- " : "", targ);
1167 if (do_cmd(ssh_program, thost, tuser, tport, 0,
1168 bp, &remin, &remout, &do_cmd_pid) < 0)
1169 exit(1);
1170 if (response() < 0)
1171 exit(1);
1172 free(bp);
1173 }
1174 source(1, argv + i);
1175 }
1176 }
1177 out:
1178 if (mode == MODE_SFTP)
1179 free(conn);
1180 free(tuser);
1181 free(thost);
1182 free(targ);
1183 free(suser);
1184 free(host);
1185 free(src);
1186 }
1187
1188 static void
tolocal(int argc,char ** argv,enum scp_mode_e mode,char * sftp_direct)1189 tolocal(int argc, char **argv, enum scp_mode_e mode, char *sftp_direct)
1190 {
1191 char *bp, *host = NULL, *suser = NULL, *src = NULL;
1192 arglist alist;
1193 struct sftp_conn *conn = NULL;
1194 int i, r, sport = -1;
1195
1196 memset(&alist, '\0', sizeof(alist));
1197 alist.list = NULL;
1198
1199 for (i = 0; i < argc - 1; i++) {
1200 free(suser);
1201 free(host);
1202 free(src);
1203 r = parse_scp_uri(argv[i], &suser, &host, &sport, &src);
1204 if (r == -1) {
1205 fmprintf(stderr, "%s: invalid uri\n", argv[i]);
1206 ++errs;
1207 continue;
1208 }
1209 if (r != 0)
1210 parse_user_host_path(argv[i], &suser, &host, &src);
1211 if (suser != NULL && !okname(suser)) {
1212 ++errs;
1213 continue;
1214 }
1215 if (!host) { /* Local to local. */
1216 freeargs(&alist);
1217 addargs(&alist, "%s", _PATH_CP);
1218 if (iamrecursive)
1219 addargs(&alist, "-r");
1220 if (pflag)
1221 addargs(&alist, "-p");
1222 addargs(&alist, "--");
1223 addargs(&alist, "%s", argv[i]);
1224 addargs(&alist, "%s", argv[argc-1]);
1225 if (do_local_cmd(&alist))
1226 ++errs;
1227 continue;
1228 }
1229 /* Remote to local. */
1230 if (mode == MODE_SFTP) {
1231 conn = do_sftp_connect(host, suser, sport,
1232 sftp_direct, &remin, &remout, &do_cmd_pid);
1233 if (conn == NULL) {
1234 error("sftp connection failed");
1235 ++errs;
1236 continue;
1237 }
1238
1239 /* The protocol */
1240 sink_sftp(1, argv[argc - 1], src, conn);
1241
1242 free(conn);
1243 (void) close(remin);
1244 (void) close(remout);
1245 remin = remout = -1;
1246 continue;
1247 }
1248 /* SCP */
1249 xasprintf(&bp, "%s -f %s%s",
1250 cmd, *src == '-' ? "-- " : "", src);
1251 if (do_cmd(ssh_program, host, suser, sport, 0, bp,
1252 &remin, &remout, &do_cmd_pid) < 0) {
1253 free(bp);
1254 ++errs;
1255 continue;
1256 }
1257 free(bp);
1258 sink(1, argv + argc - 1, src);
1259 (void) close(remin);
1260 remin = remout = -1;
1261 }
1262 free(suser);
1263 free(host);
1264 free(src);
1265 }
1266
1267 /* Prepare remote path, handling ~ by assuming cwd is the homedir */
1268 static char *
prepare_remote_path(struct sftp_conn * conn,const char * path)1269 prepare_remote_path(struct sftp_conn *conn, const char *path)
1270 {
1271 size_t nslash;
1272
1273 /* Handle ~ prefixed paths */
1274 if (*path == '\0' || strcmp(path, "~") == 0)
1275 return xstrdup(".");
1276 if (*path != '~')
1277 return xstrdup(path);
1278 if (strncmp(path, "~/", 2) == 0) {
1279 if ((nslash = strspn(path + 2, "/")) == strlen(path + 2))
1280 return xstrdup(".");
1281 return xstrdup(path + 2 + nslash);
1282 }
1283 if (sftp_can_expand_path(conn))
1284 return sftp_expand_path(conn, path);
1285 /* No protocol extension */
1286 error("server expand-path extension is required "
1287 "for ~user paths in SFTP mode");
1288 return NULL;
1289 }
1290
1291 void
source_sftp(int argc,char * src,char * targ,struct sftp_conn * conn)1292 source_sftp(int argc, char *src, char *targ, struct sftp_conn *conn)
1293 {
1294 char *target = NULL, *filename = NULL, *abs_dst = NULL;
1295 int src_is_dir, target_is_dir;
1296 Attrib a;
1297 struct stat st;
1298
1299 memset(&a, '\0', sizeof(a));
1300 if (stat(src, &st) != 0)
1301 fatal("stat local \"%s\": %s", src, strerror(errno));
1302 src_is_dir = S_ISDIR(st.st_mode);
1303 if ((filename = basename(src)) == NULL)
1304 fatal("basename \"%s\": %s", src, strerror(errno));
1305
1306 /*
1307 * No need to glob here - the local shell already took care of
1308 * the expansions
1309 */
1310 if ((target = prepare_remote_path(conn, targ)) == NULL)
1311 cleanup_exit(255);
1312 target_is_dir = sftp_remote_is_dir(conn, target);
1313 if (targetshouldbedirectory && !target_is_dir) {
1314 debug("target directory \"%s\" does not exist", target);
1315 a.flags = SSH2_FILEXFER_ATTR_PERMISSIONS;
1316 a.perm = st.st_mode | 0700; /* ensure writable */
1317 if (sftp_mkdir(conn, target, &a, 1) != 0)
1318 cleanup_exit(255); /* error already logged */
1319 target_is_dir = 1;
1320 }
1321 if (target_is_dir)
1322 abs_dst = sftp_path_append(target, filename);
1323 else {
1324 abs_dst = target;
1325 target = NULL;
1326 }
1327 debug3_f("copying local %s to remote %s", src, abs_dst);
1328
1329 if (src_is_dir && iamrecursive) {
1330 if (sftp_upload_dir(conn, src, abs_dst, pflag,
1331 SFTP_PROGRESS_ONLY, 0, 0, 1, 1) != 0) {
1332 error("failed to upload directory %s to %s", src, targ);
1333 errs = 1;
1334 }
1335 } else if (sftp_upload(conn, src, abs_dst, pflag, 0, 0, 1) != 0) {
1336 error("failed to upload file %s to %s", src, targ);
1337 errs = 1;
1338 }
1339
1340 free(abs_dst);
1341 free(target);
1342 }
1343
1344 void
source(int argc,char ** argv)1345 source(int argc, char **argv)
1346 {
1347 struct stat stb;
1348 static BUF buffer;
1349 BUF *bp;
1350 off_t i, statbytes;
1351 size_t amt, nr;
1352 int fd = -1, haderr, indx;
1353 char *last, *name, buf[PATH_MAX + 128], encname[PATH_MAX];
1354 int len;
1355
1356 for (indx = 0; indx < argc; ++indx) {
1357 fd = -1;
1358 name = argv[indx];
1359 statbytes = 0;
1360 len = strlen(name);
1361 while (len > 1 && name[len-1] == '/')
1362 name[--len] = '\0';
1363 if ((fd = open(name, O_RDONLY|O_NONBLOCK)) == -1)
1364 goto syserr;
1365 if (strchr(name, '\n') != NULL) {
1366 strvisx(encname, name, len, VIS_NL);
1367 name = encname;
1368 }
1369 if (fstat(fd, &stb) == -1) {
1370 syserr: run_err("%s: %s", name, strerror(errno));
1371 goto next;
1372 }
1373 if (stb.st_size < 0) {
1374 run_err("%s: %s", name, "Negative file size");
1375 goto next;
1376 }
1377 unset_nonblock(fd);
1378 switch (stb.st_mode & S_IFMT) {
1379 case S_IFREG:
1380 break;
1381 case S_IFDIR:
1382 if (iamrecursive) {
1383 rsource(name, &stb);
1384 goto next;
1385 }
1386 /* FALLTHROUGH */
1387 default:
1388 run_err("%s: not a regular file", name);
1389 goto next;
1390 }
1391 if ((last = strrchr(name, '/')) == NULL)
1392 last = name;
1393 else
1394 ++last;
1395 curfile = last;
1396 if (pflag) {
1397 if (do_times(remout, verbose_mode, &stb) < 0)
1398 goto next;
1399 }
1400 #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
1401 snprintf(buf, sizeof buf, "C%04o %lld %s\n",
1402 (u_int) (stb.st_mode & FILEMODEMASK),
1403 (long long)stb.st_size, last);
1404 if (verbose_mode)
1405 fmprintf(stderr, "Sending file modes: %s", buf);
1406 (void) atomicio(vwrite, remout, buf, strlen(buf));
1407 if (response() < 0)
1408 goto next;
1409 if ((bp = allocbuf(&buffer, fd, COPY_BUFLEN)) == NULL) {
1410 next: if (fd != -1) {
1411 (void) close(fd);
1412 fd = -1;
1413 }
1414 continue;
1415 }
1416 if (showprogress)
1417 start_progress_meter(curfile, stb.st_size, &statbytes);
1418 set_nonblock(remout);
1419 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
1420 amt = bp->cnt;
1421 if (i + (off_t)amt > stb.st_size)
1422 amt = stb.st_size - i;
1423 if (!haderr) {
1424 if ((nr = atomicio(read, fd,
1425 bp->buf, amt)) != amt) {
1426 haderr = errno;
1427 memset(bp->buf + nr, 0, amt - nr);
1428 }
1429 }
1430 /* Keep writing after error to retain sync */
1431 if (haderr) {
1432 (void)atomicio(vwrite, remout, bp->buf, amt);
1433 memset(bp->buf, 0, amt);
1434 continue;
1435 }
1436 if (atomicio6(vwrite, remout, bp->buf, amt, scpio,
1437 &statbytes) != amt)
1438 haderr = errno;
1439 }
1440 unset_nonblock(remout);
1441
1442 if (fd != -1) {
1443 if (close(fd) == -1 && !haderr)
1444 haderr = errno;
1445 fd = -1;
1446 }
1447 if (!haderr)
1448 (void) atomicio(vwrite, remout, empty, 1);
1449 else
1450 run_err("%s: %s", name, strerror(haderr));
1451 (void) response();
1452 if (showprogress)
1453 stop_progress_meter();
1454 }
1455 }
1456
1457 void
rsource(char * name,struct stat * statp)1458 rsource(char *name, struct stat *statp)
1459 {
1460 DIR *dirp;
1461 struct dirent *dp;
1462 char *last, *vect[1], path[PATH_MAX + 20];
1463
1464 if (!(dirp = opendir(name))) {
1465 run_err("%s: %s", name, strerror(errno));
1466 return;
1467 }
1468 last = strrchr(name, '/');
1469 if (last == NULL)
1470 last = name;
1471 else
1472 last++;
1473 if (pflag) {
1474 if (do_times(remout, verbose_mode, statp) < 0) {
1475 closedir(dirp);
1476 return;
1477 }
1478 }
1479 (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n",
1480 (u_int) (statp->st_mode & FILEMODEMASK), 0, last);
1481 if (verbose_mode)
1482 fmprintf(stderr, "Entering directory: %s", path);
1483 (void) atomicio(vwrite, remout, path, strlen(path));
1484 if (response() < 0) {
1485 closedir(dirp);
1486 return;
1487 }
1488 while ((dp = readdir(dirp)) != NULL) {
1489 if (dp->d_ino == 0)
1490 continue;
1491 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
1492 continue;
1493 if ((size_t)snprintf(path, sizeof path, "%s/%s",
1494 name, dp->d_name) >= sizeof path) {
1495 run_err("%s/%s: name too long", name, dp->d_name);
1496 continue;
1497 }
1498 vect[0] = path;
1499 source(1, vect);
1500 }
1501 (void) closedir(dirp);
1502 (void) atomicio(vwrite, remout, __UNCONST("E\n"), 2);
1503 (void) response();
1504 }
1505
1506 void
sink_sftp(int argc,char * dst,const char * src,struct sftp_conn * conn)1507 sink_sftp(int argc, char *dst, const char *src, struct sftp_conn *conn)
1508 {
1509 char *abs_src = NULL;
1510 char *abs_dst = NULL;
1511 glob_t g;
1512 char *filename, *tmp = NULL;
1513 int i, r, err = 0, dst_is_dir;
1514 struct stat st;
1515
1516 memset(&g, 0, sizeof(g));
1517
1518 /*
1519 * Here, we need remote glob as SFTP can not depend on remote shell
1520 * expansions
1521 */
1522 if ((abs_src = prepare_remote_path(conn, src)) == NULL) {
1523 err = -1;
1524 goto out;
1525 }
1526
1527 debug3_f("copying remote %s to local %s", abs_src, dst);
1528 if ((r = sftp_glob(conn, abs_src, GLOB_NOCHECK|GLOB_MARK,
1529 NULL, &g)) != 0) {
1530 if (r == GLOB_NOSPACE)
1531 error("%s: too many glob matches", src);
1532 else
1533 error("%s: %s", src, strerror(ENOENT));
1534 err = -1;
1535 goto out;
1536 }
1537
1538 /* Did we actually get any matches back from the glob? */
1539 if (g.gl_matchc == 0 && g.gl_pathc == 1 && g.gl_pathv[0] != 0) {
1540 /*
1541 * If nothing matched but a path returned, then it's probably
1542 * a GLOB_NOCHECK result. Check whether the unglobbed path
1543 * exists so we can give a nice error message early.
1544 */
1545 if (sftp_stat(conn, g.gl_pathv[0], 1, NULL) != 0) {
1546 error("%s: %s", src, strerror(ENOENT));
1547 err = -1;
1548 goto out;
1549 }
1550 }
1551
1552 if ((r = stat(dst, &st)) != 0)
1553 debug2_f("stat local \"%s\": %s", dst, strerror(errno));
1554 dst_is_dir = r == 0 && S_ISDIR(st.st_mode);
1555
1556 if (g.gl_matchc > 1 && !dst_is_dir) {
1557 if (r == 0) {
1558 error("Multiple files match pattern, but destination "
1559 "\"%s\" is not a directory", dst);
1560 err = -1;
1561 goto out;
1562 }
1563 debug2_f("creating destination \"%s\"", dst);
1564 if (mkdir(dst, 0777) != 0) {
1565 error("local mkdir \"%s\": %s", dst, strerror(errno));
1566 err = -1;
1567 goto out;
1568 }
1569 dst_is_dir = 1;
1570 }
1571
1572 for (i = 0; g.gl_pathv[i] && !interrupted; i++) {
1573 tmp = xstrdup(g.gl_pathv[i]);
1574 if ((filename = basename(tmp)) == NULL) {
1575 error("basename %s: %s", tmp, strerror(errno));
1576 err = -1;
1577 goto out;
1578 }
1579
1580 if (dst_is_dir)
1581 abs_dst = sftp_path_append(dst, filename);
1582 else
1583 abs_dst = xstrdup(dst);
1584
1585 debug("Fetching %s to %s\n", g.gl_pathv[i], abs_dst);
1586 if (sftp_globpath_is_dir(g.gl_pathv[i]) && iamrecursive) {
1587 if (sftp_download_dir(conn, g.gl_pathv[i], abs_dst,
1588 NULL, pflag, SFTP_PROGRESS_ONLY, 0, 0, 1, 1) == -1)
1589 err = -1;
1590 } else {
1591 if (sftp_download(conn, g.gl_pathv[i], abs_dst, NULL,
1592 pflag, 0, 0, 1) == -1)
1593 err = -1;
1594 }
1595 free(abs_dst);
1596 abs_dst = NULL;
1597 free(tmp);
1598 tmp = NULL;
1599 }
1600
1601 out:
1602 free(abs_src);
1603 free(tmp);
1604 globfree(&g);
1605 if (err == -1)
1606 errs = 1;
1607 }
1608
1609
1610 #define TYPE_OVERFLOW(type, val) \
1611 ((sizeof(type) == 4 && (val) > INT32_MAX) || \
1612 (sizeof(type) == 8 && (val) > INT64_MAX) || \
1613 (sizeof(type) != 4 && sizeof(type) != 8))
1614
1615 void
sink(int argc,char ** argv,const char * src)1616 sink(int argc, char **argv, const char *src)
1617 {
1618 static BUF buffer;
1619 struct stat stb;
1620 BUF *bp;
1621 off_t i;
1622 size_t j, count;
1623 int amt, exists, first, ofd;
1624 mode_t mode, omode, mask;
1625 off_t size, statbytes;
1626 unsigned long long ull;
1627 int setimes, targisdir, wrerr;
1628 char ch, *cp, *np, *targ, *vect[1], buf[2048], visbuf[2048];
1629 const char *why;
1630 char **patterns = NULL;
1631 size_t n, npatterns = 0;
1632 struct timeval tv[2];
1633
1634 #define atime tv[0]
1635 #define mtime tv[1]
1636 #define SCREWUP(str) { why = str; goto screwup; }
1637
1638 if (TYPE_OVERFLOW(time_t, 0) || TYPE_OVERFLOW(off_t, 0))
1639 SCREWUP("Unexpected off_t/time_t size");
1640
1641 setimes = targisdir = 0;
1642 mask = umask(0);
1643 if (!pflag)
1644 (void) umask(mask);
1645 if (argc != 1) {
1646 run_err("ambiguous target");
1647 exit(1);
1648 }
1649 targ = *argv;
1650 if (targetshouldbedirectory)
1651 verifydir(targ);
1652
1653 (void) atomicio(vwrite, remout, empty, 1);
1654 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
1655 targisdir = 1;
1656 if (src != NULL && !iamrecursive && !Tflag) {
1657 /*
1658 * Prepare to try to restrict incoming filenames to match
1659 * the requested destination file glob.
1660 */
1661 if (brace_expand(src, &patterns, &npatterns) != 0)
1662 fatal_f("could not expand pattern");
1663 }
1664 for (first = 1;; first = 0) {
1665 cp = buf;
1666 if (atomicio(read, remin, cp, 1) != 1)
1667 goto done;
1668 if (*cp++ == '\n')
1669 SCREWUP("unexpected <newline>");
1670 do {
1671 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1672 SCREWUP("lost connection");
1673 *cp++ = ch;
1674 } while (cp < &buf[sizeof(buf) - 1] && ch != '\n');
1675 *cp = 0;
1676 if (verbose_mode)
1677 fmprintf(stderr, "Sink: %s", buf);
1678
1679 if (buf[0] == '\01' || buf[0] == '\02') {
1680 if (iamremote == 0) {
1681 (void) snmprintf(visbuf, sizeof(visbuf),
1682 NULL, "%s", buf + 1);
1683 (void) atomicio(vwrite, STDERR_FILENO,
1684 visbuf, strlen(visbuf));
1685 }
1686 if (buf[0] == '\02')
1687 exit(1);
1688 ++errs;
1689 continue;
1690 }
1691 if (buf[0] == 'E') {
1692 (void) atomicio(vwrite, remout, __UNCONST(""), 1);
1693 goto done;
1694 }
1695 if (ch == '\n')
1696 *--cp = 0;
1697
1698 cp = buf;
1699 if (*cp == 'T') {
1700 setimes++;
1701 cp++;
1702 if (!isdigit((unsigned char)*cp))
1703 SCREWUP("mtime.sec not present");
1704 ull = strtoull(cp, &cp, 10);
1705 if (!cp || *cp++ != ' ')
1706 SCREWUP("mtime.sec not delimited");
1707 if (TYPE_OVERFLOW(time_t, ull))
1708 setimes = 0; /* out of range */
1709 mtime.tv_sec = ull;
1710 mtime.tv_usec = strtol(cp, &cp, 10);
1711 if (!cp || *cp++ != ' ' || mtime.tv_usec < 0 ||
1712 mtime.tv_usec > 999999)
1713 SCREWUP("mtime.usec not delimited");
1714 if (!isdigit((unsigned char)*cp))
1715 SCREWUP("atime.sec not present");
1716 ull = strtoull(cp, &cp, 10);
1717 if (!cp || *cp++ != ' ')
1718 SCREWUP("atime.sec not delimited");
1719 if (TYPE_OVERFLOW(time_t, ull))
1720 setimes = 0; /* out of range */
1721 atime.tv_sec = ull;
1722 atime.tv_usec = strtol(cp, &cp, 10);
1723 if (!cp || *cp++ != '\0' || atime.tv_usec < 0 ||
1724 atime.tv_usec > 999999)
1725 SCREWUP("atime.usec not delimited");
1726 (void) atomicio(vwrite, remout, empty, 1);
1727 continue;
1728 }
1729 if (*cp != 'C' && *cp != 'D') {
1730 /*
1731 * Check for the case "rcp remote:foo\* local:bar".
1732 * In this case, the line "No match." can be returned
1733 * by the shell before the rcp command on the remote is
1734 * executed so the ^Aerror_message convention isn't
1735 * followed.
1736 */
1737 if (first) {
1738 run_err("%s", cp);
1739 exit(1);
1740 }
1741 SCREWUP("expected control record");
1742 }
1743 mode = 0;
1744 for (++cp; cp < buf + 5; cp++) {
1745 if (*cp < '0' || *cp > '7')
1746 SCREWUP("bad mode");
1747 mode = (mode << 3) | (*cp - '0');
1748 }
1749 if (!pflag)
1750 mode &= ~mask;
1751 if (*cp++ != ' ')
1752 SCREWUP("mode not delimited");
1753
1754 if (!isdigit((unsigned char)*cp))
1755 SCREWUP("size not present");
1756 ull = strtoull(cp, &cp, 10);
1757 if (!cp || *cp++ != ' ')
1758 SCREWUP("size not delimited");
1759 if (TYPE_OVERFLOW(off_t, ull))
1760 SCREWUP("size out of range");
1761 size = (off_t)ull;
1762
1763 if (*cp == '\0' || strchr(cp, '/') != NULL ||
1764 strcmp(cp, ".") == 0 || strcmp(cp, "..") == 0) {
1765 run_err("error: unexpected filename: %s", cp);
1766 exit(1);
1767 }
1768 if (npatterns > 0) {
1769 for (n = 0; n < npatterns; n++) {
1770 if (strcmp(patterns[n], cp) == 0 ||
1771 fnmatch(patterns[n], cp, 0) == 0)
1772 break;
1773 }
1774 if (n >= npatterns) {
1775 debug2_f("incoming filename \"%s\" does not "
1776 "match any of %zu expected patterns", cp,
1777 npatterns);
1778 for (n = 0; n < npatterns; n++) {
1779 debug3_f("expected pattern %zu: \"%s\"",
1780 n, patterns[n]);
1781 }
1782 SCREWUP("filename does not match request");
1783 }
1784 }
1785 if (targisdir) {
1786 static char *namebuf;
1787 static size_t cursize;
1788 size_t need;
1789
1790 need = strlen(targ) + strlen(cp) + 250;
1791 if (need > cursize) {
1792 free(namebuf);
1793 namebuf = xmalloc(need);
1794 cursize = need;
1795 }
1796 (void) snprintf(namebuf, need, "%s%s%s", targ,
1797 strcmp(targ, "/") ? "/" : "", cp);
1798 np = namebuf;
1799 } else
1800 np = targ;
1801 curfile = cp;
1802 exists = stat(np, &stb) == 0;
1803 if (buf[0] == 'D') {
1804 int mod_flag = pflag;
1805 if (!iamrecursive)
1806 SCREWUP("received directory without -r");
1807 if (exists) {
1808 if (!S_ISDIR(stb.st_mode)) {
1809 errno = ENOTDIR;
1810 goto bad;
1811 }
1812 if (pflag)
1813 (void) chmod(np, mode);
1814 } else {
1815 /* Handle copying from a read-only directory */
1816 mod_flag = 1;
1817 if (mkdir(np, mode | S_IRWXU) == -1)
1818 goto bad;
1819 }
1820 vect[0] = xstrdup(np);
1821 sink(1, vect, src);
1822 if (setimes) {
1823 setimes = 0;
1824 (void) utimes(vect[0], tv);
1825 }
1826 if (mod_flag)
1827 (void) chmod(vect[0], mode);
1828 free(vect[0]);
1829 continue;
1830 }
1831 omode = mode;
1832 mode |= S_IWUSR;
1833 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) == -1) {
1834 bad: run_err("%s: %s", np, strerror(errno));
1835 continue;
1836 }
1837 (void) atomicio(vwrite, remout, empty, 1);
1838 if ((bp = allocbuf(&buffer, ofd, COPY_BUFLEN)) == NULL) {
1839 (void) close(ofd);
1840 continue;
1841 }
1842 cp = bp->buf;
1843 wrerr = 0;
1844
1845 /*
1846 * NB. do not use run_err() unless immediately followed by
1847 * exit() below as it may send a spurious reply that might
1848 * desyncronise us from the peer. Use note_err() instead.
1849 */
1850 statbytes = 0;
1851 if (showprogress)
1852 start_progress_meter(curfile, size, &statbytes);
1853 set_nonblock(remin);
1854 for (count = i = 0; i < size; i += bp->cnt) {
1855 amt = bp->cnt;
1856 if (i + amt > size)
1857 amt = size - i;
1858 count += amt;
1859 do {
1860 j = atomicio6(read, remin, cp, amt,
1861 scpio, &statbytes);
1862 if (j == 0) {
1863 run_err("%s", j != EPIPE ?
1864 strerror(errno) :
1865 "dropped connection");
1866 exit(1);
1867 }
1868 amt -= j;
1869 cp += j;
1870 } while (amt > 0);
1871
1872 if (count == bp->cnt) {
1873 /* Keep reading so we stay sync'd up. */
1874 if (!wrerr) {
1875 if (atomicio(vwrite, ofd, bp->buf,
1876 count) != count) {
1877 note_err("%s: %s", np,
1878 strerror(errno));
1879 wrerr = 1;
1880 }
1881 }
1882 count = 0;
1883 cp = bp->buf;
1884 }
1885 }
1886 unset_nonblock(remin);
1887 if (count != 0 && !wrerr &&
1888 atomicio(vwrite, ofd, bp->buf, count) != count) {
1889 note_err("%s: %s", np, strerror(errno));
1890 wrerr = 1;
1891 }
1892 if (!wrerr && (!exists || S_ISREG(stb.st_mode)) &&
1893 ftruncate(ofd, size) != 0)
1894 note_err("%s: truncate: %s", np, strerror(errno));
1895 if (pflag) {
1896 if (exists || omode != mode)
1897 if (fchmod(ofd, omode)) {
1898 note_err("%s: set mode: %s",
1899 np, strerror(errno));
1900 }
1901 } else {
1902 if (!exists && omode != mode)
1903 if (fchmod(ofd, omode & ~mask)) {
1904 note_err("%s: set mode: %s",
1905 np, strerror(errno));
1906 }
1907 }
1908 if (close(ofd) == -1)
1909 note_err("%s: close: %s", np, strerror(errno));
1910 (void) response();
1911 if (showprogress)
1912 stop_progress_meter();
1913 if (setimes && !wrerr) {
1914 setimes = 0;
1915 if (utimes(np, tv) == -1) {
1916 note_err("%s: set times: %s",
1917 np, strerror(errno));
1918 }
1919 }
1920 /* If no error was noted then signal success for this file */
1921 if (note_err(NULL) == 0)
1922 (void) atomicio(vwrite, remout, __UNCONST(""), 1);
1923 }
1924 done:
1925 for (n = 0; n < npatterns; n++)
1926 free(patterns[n]);
1927 free(patterns);
1928 return;
1929 screwup:
1930 for (n = 0; n < npatterns; n++)
1931 free(patterns[n]);
1932 free(patterns);
1933 run_err("protocol error: %s", why);
1934 exit(1);
1935 }
1936
1937 void
throughlocal_sftp(struct sftp_conn * from,struct sftp_conn * to,char * src,char * targ)1938 throughlocal_sftp(struct sftp_conn *from, struct sftp_conn *to,
1939 char *src, char *targ)
1940 {
1941 char *target = NULL, *filename = NULL, *abs_dst = NULL;
1942 char *abs_src = NULL, *tmp = NULL;
1943 glob_t g;
1944 int i, r, targetisdir, err = 0;
1945
1946 if ((filename = basename(src)) == NULL)
1947 fatal("basename %s: %s", src, strerror(errno));
1948
1949 if ((abs_src = prepare_remote_path(from, src)) == NULL ||
1950 (target = prepare_remote_path(to, targ)) == NULL)
1951 cleanup_exit(255);
1952 memset(&g, 0, sizeof(g));
1953
1954 targetisdir = sftp_remote_is_dir(to, target);
1955 if (!targetisdir && targetshouldbedirectory) {
1956 error("%s: destination is not a directory", targ);
1957 err = -1;
1958 goto out;
1959 }
1960
1961 debug3_f("copying remote %s to remote %s", abs_src, target);
1962 if ((r = sftp_glob(from, abs_src, GLOB_NOCHECK|GLOB_MARK,
1963 NULL, &g)) != 0) {
1964 if (r == GLOB_NOSPACE)
1965 error("%s: too many glob matches", src);
1966 else
1967 error("%s: %s", src, strerror(ENOENT));
1968 err = -1;
1969 goto out;
1970 }
1971
1972 /* Did we actually get any matches back from the glob? */
1973 if (g.gl_matchc == 0 && g.gl_pathc == 1 && g.gl_pathv[0] != 0) {
1974 /*
1975 * If nothing matched but a path returned, then it's probably
1976 * a GLOB_NOCHECK result. Check whether the unglobbed path
1977 * exists so we can give a nice error message early.
1978 */
1979 if (sftp_stat(from, g.gl_pathv[0], 1, NULL) != 0) {
1980 error("%s: %s", src, strerror(ENOENT));
1981 err = -1;
1982 goto out;
1983 }
1984 }
1985
1986 for (i = 0; g.gl_pathv[i] && !interrupted; i++) {
1987 tmp = xstrdup(g.gl_pathv[i]);
1988 if ((filename = basename(tmp)) == NULL) {
1989 error("basename %s: %s", tmp, strerror(errno));
1990 err = -1;
1991 goto out;
1992 }
1993
1994 if (targetisdir)
1995 abs_dst = sftp_path_append(target, filename);
1996 else
1997 abs_dst = xstrdup(target);
1998
1999 debug("Fetching %s to %s\n", g.gl_pathv[i], abs_dst);
2000 if (sftp_globpath_is_dir(g.gl_pathv[i]) && iamrecursive) {
2001 if (sftp_crossload_dir(from, to, g.gl_pathv[i], abs_dst,
2002 NULL, pflag, SFTP_PROGRESS_ONLY, 1) == -1)
2003 err = -1;
2004 } else {
2005 if (sftp_crossload(from, to, g.gl_pathv[i], abs_dst,
2006 NULL, pflag) == -1)
2007 err = -1;
2008 }
2009 free(abs_dst);
2010 abs_dst = NULL;
2011 free(tmp);
2012 tmp = NULL;
2013 }
2014
2015 out:
2016 free(abs_src);
2017 free(abs_dst);
2018 free(target);
2019 free(tmp);
2020 globfree(&g);
2021 if (err == -1)
2022 errs = 1;
2023 }
2024
2025 int
response(void)2026 response(void)
2027 {
2028 char ch, *cp, resp, rbuf[2048], visbuf[2048];
2029
2030 if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp))
2031 lostconn(0);
2032
2033 cp = rbuf;
2034 switch (resp) {
2035 case 0: /* ok */
2036 return (0);
2037 default:
2038 *cp++ = resp;
2039 /* FALLTHROUGH */
2040 case 1: /* error, followed by error msg */
2041 case 2: /* fatal error, "" */
2042 do {
2043 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
2044 lostconn(0);
2045 *cp++ = ch;
2046 } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
2047
2048 if (!iamremote) {
2049 cp[-1] = '\0';
2050 (void) snmprintf(visbuf, sizeof(visbuf),
2051 NULL, "%s\n", rbuf);
2052 (void) atomicio(vwrite, STDERR_FILENO,
2053 visbuf, strlen(visbuf));
2054 }
2055 ++errs;
2056 if (resp == 1)
2057 return (-1);
2058 exit(1);
2059 }
2060 /* NOTREACHED */
2061 }
2062
2063 static void
usage(void)2064 usage(void)
2065 {
2066 (void) fprintf(stderr,
2067 "usage: scp [-346ABCOpqRrsTv] [-c cipher] [-D sftp_server_path] [-F ssh_config]\n"
2068 " [-i identity_file] [-J destination] [-l limit] [-o ssh_option]\n"
2069 " [-P port] [-S program] [-X sftp_option] source ... target\n");
2070 exit(1);
2071 }
2072
2073 void
run_err(const char * fmt,...)2074 run_err(const char *fmt,...)
2075 {
2076 static FILE *fp;
2077 va_list ap;
2078
2079 ++errs;
2080 if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) {
2081 (void) fprintf(fp, "%c", 0x01);
2082 (void) fprintf(fp, "scp: ");
2083 va_start(ap, fmt);
2084 (void) vfprintf(fp, fmt, ap);
2085 va_end(ap);
2086 (void) fprintf(fp, "\n");
2087 (void) fflush(fp);
2088 }
2089
2090 if (!iamremote) {
2091 va_start(ap, fmt);
2092 vfmprintf(stderr, fmt, ap);
2093 va_end(ap);
2094 fprintf(stderr, "\n");
2095 }
2096 }
2097
2098 /*
2099 * Notes a sink error for sending at the end of a file transfer. Returns 0 if
2100 * no error has been noted or -1 otherwise. Use note_err(NULL) to flush
2101 * any active error at the end of the transfer.
2102 */
2103 int
note_err(const char * fmt,...)2104 note_err(const char *fmt, ...)
2105 {
2106 static char *emsg;
2107 va_list ap;
2108
2109 /* Replay any previously-noted error */
2110 if (fmt == NULL) {
2111 if (emsg == NULL)
2112 return 0;
2113 run_err("%s", emsg);
2114 free(emsg);
2115 emsg = NULL;
2116 return -1;
2117 }
2118
2119 errs++;
2120 /* Prefer first-noted error */
2121 if (emsg != NULL)
2122 return -1;
2123
2124 va_start(ap, fmt);
2125 vasnmprintf(&emsg, INT_MAX, NULL, fmt, ap);
2126 va_end(ap);
2127 return -1;
2128 }
2129
2130 void
verifydir(char * cp)2131 verifydir(char *cp)
2132 {
2133 struct stat stb;
2134
2135 if (!stat(cp, &stb)) {
2136 if (S_ISDIR(stb.st_mode))
2137 return;
2138 errno = ENOTDIR;
2139 }
2140 run_err("%s: %s", cp, strerror(errno));
2141 killchild(0);
2142 }
2143
2144 int
okname(char * cp0)2145 okname(char *cp0)
2146 {
2147 int c;
2148 char *cp;
2149
2150 cp = cp0;
2151 do {
2152 c = (int)*cp;
2153 if (c & 0200)
2154 goto bad;
2155 if (!isalpha(c) && !isdigit((unsigned char)c)) {
2156 switch (c) {
2157 case '\'':
2158 case '"':
2159 case '`':
2160 case ' ':
2161 case '#':
2162 goto bad;
2163 default:
2164 break;
2165 }
2166 }
2167 } while (*++cp);
2168 return (1);
2169
2170 bad: fmprintf(stderr, "%s: invalid user name\n", cp0);
2171 return (0);
2172 }
2173
2174 BUF *
allocbuf(BUF * bp,int fd,int blksize)2175 allocbuf(BUF *bp, int fd, int blksize)
2176 {
2177 size_t size;
2178 struct stat stb;
2179
2180 if (fstat(fd, &stb) == -1) {
2181 run_err("fstat: %s", strerror(errno));
2182 return (0);
2183 }
2184 size = ROUNDUP(stb.st_blksize, blksize);
2185 if (size == 0)
2186 size = blksize;
2187 if (bp->cnt >= size)
2188 return (bp);
2189 bp->buf = xrecallocarray(bp->buf, bp->cnt, size, 1);
2190 bp->cnt = size;
2191 return (bp);
2192 }
2193
2194 static void
lostconn(int signo)2195 lostconn(int signo)
2196 {
2197 if (!iamremote)
2198 (void)write(STDERR_FILENO, "lost connection\n", 16);
2199 if (signo)
2200 _exit(1);
2201 else
2202 exit(1);
2203 }
2204
2205 void
cleanup_exit(int i)2206 cleanup_exit(int i)
2207 {
2208 if (remin > 0)
2209 close(remin);
2210 if (remout > 0)
2211 close(remout);
2212 if (remin2 > 0)
2213 close(remin2);
2214 if (remout2 > 0)
2215 close(remout2);
2216 if (do_cmd_pid > 0)
2217 (void)waitpid(do_cmd_pid, NULL, 0);
2218 if (do_cmd_pid2 > 0)
2219 (void)waitpid(do_cmd_pid2, NULL, 0);
2220 exit(i);
2221 }
2222