Annotation of src/usr.bin/ssh/scp.c, Revision 1.149
1.149 ! stevesk 1: /* $OpenBSD: scp.c,v 1.148 2006/07/17 01:31:09 stevesk Exp $ */
1.1 deraadt 2: /*
1.38 deraadt 3: * scp - secure remote copy. This is basically patched BSD rcp which
4: * uses ssh to do the data transfer (instead of using rcmd).
1.27 markus 5: *
1.38 deraadt 6: * NOTE: This version should NOT be suid root. (This uses ssh to
7: * do the transfer and ssh has the necessary privileges.)
1.27 markus 8: *
1.38 deraadt 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".
1.39 markus 16: */
1.38 deraadt 17: /*
1.60 deraadt 18: * Copyright (c) 1999 Theo de Raadt. All rights reserved.
19: * Copyright (c) 1999 Aaron Campbell. All rights reserved.
1.27 markus 20: *
1.38 deraadt 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.
1.27 markus 29: *
1.38 deraadt 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: */
1.1 deraadt 41:
42: /*
1.35 deraadt 43: * Parts from:
44: *
1.1 deraadt 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.
1.103 millert 56: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 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"
1.132 stevesk 75:
76: #include <sys/types.h>
77: #include <sys/wait.h>
1.134 stevesk 78: #include <sys/stat.h>
1.131 stevesk 79:
1.135 stevesk 80: #include <ctype.h>
1.131 stevesk 81: #include <dirent.h>
1.147 stevesk 82: #include <errno.h>
1.144 stevesk 83: #include <fcntl.h>
1.143 stevesk 84: #include <pwd.h>
1.133 stevesk 85: #include <signal.h>
1.146 stevesk 86: #include <stdarg.h>
1.149 ! stevesk 87: #include <time.h>
1.148 stevesk 88: #include <unistd.h>
1.1 deraadt 89:
90: #include "xmalloc.h"
1.51 markus 91: #include "atomicio.h"
1.50 markus 92: #include "pathnames.h"
1.51 markus 93: #include "log.h"
1.69 mouring 94: #include "misc.h"
1.97 fgsch 95: #include "progressmeter.h"
1.1 deraadt 96:
1.140 deraadt 97: int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout);
1.11 aaron 98:
1.99 markus 99: void bwlimit(int);
100:
1.70 mouring 101: /* Struct for addargs */
102: arglist args;
1.41 markus 103:
1.99 markus 104: /* Bandwidth limit */
1.113 djm 105: off_t limit_rate = 0;
1.99 markus 106:
1.11 aaron 107: /* Name of current file being transferred. */
108: char *curfile;
1.4 aaron 109:
1.1 deraadt 110: /* This is set to non-zero to enable verbose mode. */
1.17 markus 111: int verbose_mode = 0;
1.1 deraadt 112:
1.6 aaron 113: /* This is set to zero if the progressmeter is not desired. */
114: int showprogress = 1;
115:
1.34 deraadt 116: /* This is the program to execute for the secured connection. ("ssh" or -S) */
1.50 markus 117: char *ssh_program = _PATH_SSH_PROGRAM;
1.34 deraadt 118:
1.92 markus 119: /* This is used to store the pid of ssh_program */
1.105 djm 120: pid_t do_cmd_pid = -1;
121:
122: static void
123: killchild(int signo)
124: {
1.119 dtucker 125: if (do_cmd_pid > 1) {
1.123 avsm 126: kill(do_cmd_pid, signo ? signo : SIGTERM);
1.119 dtucker 127: waitpid(do_cmd_pid, NULL, 0);
128: }
1.105 djm 129:
1.123 avsm 130: if (signo)
131: _exit(1);
132: exit(1);
1.105 djm 133: }
1.92 markus 134:
1.129 djm 135: static int
136: do_local_cmd(arglist *a)
137: {
138: u_int i;
139: int status;
140: pid_t pid;
141:
142: if (a->num == 0)
143: fatal("do_local_cmd: no arguments");
144:
145: if (verbose_mode) {
146: fprintf(stderr, "Executing:");
147: for (i = 0; i < a->num; i++)
148: fprintf(stderr, " %s", a->list[i]);
149: fprintf(stderr, "\n");
150: }
151: if ((pid = fork()) == -1)
152: fatal("do_local_cmd: fork: %s", strerror(errno));
153:
154: if (pid == 0) {
155: execvp(a->list[0], a->list);
156: perror(a->list[0]);
157: exit(1);
158: }
159:
160: do_cmd_pid = pid;
161: signal(SIGTERM, killchild);
162: signal(SIGINT, killchild);
163: signal(SIGHUP, killchild);
164:
165: while (waitpid(pid, &status, 0) == -1)
166: if (errno != EINTR)
167: fatal("do_local_cmd: waitpid: %s", strerror(errno));
168:
169: do_cmd_pid = -1;
170:
171: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
172: return (-1);
173:
174: return (0);
175: }
176:
1.20 markus 177: /*
178: * This function executes the given command as the specified user on the
179: * given host. This returns < 0 if execution fails, and >= 0 otherwise. This
180: * assigns the input and output file descriptors on success.
181: */
1.1 deraadt 182:
1.27 markus 183: int
1.140 deraadt 184: do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout)
1.1 deraadt 185: {
1.18 markus 186: int pin[2], pout[2], reserved[2];
187:
188: if (verbose_mode)
1.78 deraadt 189: fprintf(stderr,
190: "Executing: program %s host %s, user %s, command %s\n",
191: ssh_program, host,
192: remuser ? remuser : "(unspecified)", cmd);
1.18 markus 193:
1.20 markus 194: /*
195: * Reserve two descriptors so that the real pipes won't get
196: * descriptors 0 and 1 because that will screw up dup2 below.
197: */
1.142 markus 198: if (pipe(reserved) < 0)
199: fatal("pipe: %s", strerror(errno));
1.18 markus 200:
201: /* Create a socket pair for communicating with ssh. */
202: if (pipe(pin) < 0)
203: fatal("pipe: %s", strerror(errno));
204: if (pipe(pout) < 0)
205: fatal("pipe: %s", strerror(errno));
206:
207: /* Free the reserved descriptors. */
208: close(reserved[0]);
209: close(reserved[1]);
210:
1.106 nino 211: /* Fork a child to execute the command on the remote host using ssh. */
1.92 markus 212: do_cmd_pid = fork();
213: if (do_cmd_pid == 0) {
1.18 markus 214: /* Child. */
215: close(pin[1]);
216: close(pout[0]);
217: dup2(pin[0], 0);
218: dup2(pout[1], 1);
219: close(pin[0]);
220: close(pout[1]);
221:
1.129 djm 222: replacearg(&args, 0, "%s", ssh_program);
1.41 markus 223: if (remuser != NULL)
1.70 mouring 224: addargs(&args, "-l%s", remuser);
225: addargs(&args, "%s", host);
226: addargs(&args, "%s", cmd);
1.18 markus 227:
1.41 markus 228: execvp(ssh_program, args.list);
1.34 deraadt 229: perror(ssh_program);
1.18 markus 230: exit(1);
1.92 markus 231: } else if (do_cmd_pid == -1) {
232: fatal("fork: %s", strerror(errno));
1.18 markus 233: }
234: /* Parent. Close the other side, and return the local side. */
235: close(pin[0]);
236: *fdout = pin[1];
237: close(pout[1]);
238: *fdin = pout[0];
1.105 djm 239: signal(SIGTERM, killchild);
240: signal(SIGINT, killchild);
241: signal(SIGHUP, killchild);
1.18 markus 242: return 0;
1.1 deraadt 243: }
244:
245: typedef struct {
1.124 djm 246: size_t cnt;
1.1 deraadt 247: char *buf;
248: } BUF;
249:
1.18 markus 250: BUF *allocbuf(BUF *, int, int);
251: void lostconn(int);
252: int okname(char *);
253: void run_err(const char *,...);
254: void verifydir(char *);
1.1 deraadt 255:
256: struct passwd *pwd;
1.18 markus 257: uid_t userid;
1.1 deraadt 258: int errs, remin, remout;
259: int pflag, iamremote, iamrecursive, targetshouldbedirectory;
260:
261: #define CMDNEEDS 64
262: char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
263:
1.18 markus 264: int response(void);
265: void rsource(char *, struct stat *);
266: void sink(int, char *[]);
267: void source(int, char *[]);
268: void tolocal(int, char *[]);
269: void toremote(char *, int, char *[]);
270: void usage(void);
1.1 deraadt 271:
272: int
1.104 djm 273: main(int argc, char **argv)
1.1 deraadt 274: {
1.145 djm 275: int ch, fflag, tflag, status, n;
1.99 markus 276: double speed;
1.145 djm 277: char *targ, *endp, **newargv;
1.1 deraadt 278: extern char *optarg;
279: extern int optind;
1.126 djm 280:
281: /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
282: sanitise_stdfd();
1.145 djm 283:
284: /* Copy argv, because we modify it */
285: newargv = xcalloc(MAX(argc + 1, 1), sizeof(*newargv));
286: for (n = 0; n < argc; n++)
287: newargv[n] = xstrdup(argv[n]);
288: argv = newargv;
1.1 deraadt 289:
1.129 djm 290: memset(&args, '\0', sizeof(args));
1.41 markus 291: args.list = NULL;
1.129 djm 292: addargs(&args, "%s", ssh_program);
1.70 mouring 293: addargs(&args, "-x");
1.82 stevesk 294: addargs(&args, "-oForwardAgent no");
1.128 reyk 295: addargs(&args, "-oPermitLocalCommand no");
1.84 stevesk 296: addargs(&args, "-oClearAllForwardings yes");
1.41 markus 297:
1.1 deraadt 298: fflag = tflag = 0;
1.100 markus 299: while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q1246S:o:F:")) != -1)
1.18 markus 300: switch (ch) {
301: /* User-visible flags. */
1.100 markus 302: case '1':
303: case '2':
1.23 markus 304: case '4':
1.41 markus 305: case '6':
306: case 'C':
1.70 mouring 307: addargs(&args, "-%c", ch);
1.41 markus 308: break;
309: case 'o':
310: case 'c':
311: case 'i':
1.83 stevesk 312: case 'F':
1.70 mouring 313: addargs(&args, "-%c%s", ch, optarg);
1.23 markus 314: break;
1.41 markus 315: case 'P':
1.70 mouring 316: addargs(&args, "-p%s", optarg);
1.41 markus 317: break;
318: case 'B':
1.70 mouring 319: addargs(&args, "-oBatchmode yes");
1.23 markus 320: break;
1.99 markus 321: case 'l':
322: speed = strtod(optarg, &endp);
323: if (speed <= 0 || *endp != '\0')
324: usage();
1.113 djm 325: limit_rate = speed * 1024;
1.99 markus 326: break;
1.1 deraadt 327: case 'p':
328: pflag = 1;
329: break;
330: case 'r':
331: iamrecursive = 1;
332: break;
1.34 deraadt 333: case 'S':
1.41 markus 334: ssh_program = xstrdup(optarg);
335: break;
336: case 'v':
1.72 markus 337: addargs(&args, "-v");
1.41 markus 338: verbose_mode = 1;
339: break;
340: case 'q':
1.111 dtucker 341: addargs(&args, "-q");
1.41 markus 342: showprogress = 0;
1.34 deraadt 343: break;
344:
1.18 markus 345: /* Server options. */
1.1 deraadt 346: case 'd':
347: targetshouldbedirectory = 1;
348: break;
1.18 markus 349: case 'f': /* "from" */
1.1 deraadt 350: iamremote = 1;
351: fflag = 1;
352: break;
1.18 markus 353: case 't': /* "to" */
1.1 deraadt 354: iamremote = 1;
355: tflag = 1;
356: break;
357: default:
358: usage();
359: }
360: argc -= optind;
361: argv += optind;
362:
363: if ((pwd = getpwuid(userid = getuid())) == NULL)
1.108 deraadt 364: fatal("unknown user %u", (u_int) userid);
1.1 deraadt 365:
1.18 markus 366: if (!isatty(STDERR_FILENO))
1.7 deraadt 367: showprogress = 0;
368:
1.1 deraadt 369: remin = STDIN_FILENO;
370: remout = STDOUT_FILENO;
371:
1.52 stevesk 372: if (fflag) {
1.18 markus 373: /* Follow "protocol", send data. */
374: (void) response();
1.1 deraadt 375: source(argc, argv);
376: exit(errs != 0);
377: }
1.18 markus 378: if (tflag) {
379: /* Receive data. */
1.1 deraadt 380: sink(argc, argv);
381: exit(errs != 0);
382: }
383: if (argc < 2)
384: usage();
385: if (argc > 2)
386: targetshouldbedirectory = 1;
387:
388: remin = remout = -1;
1.92 markus 389: do_cmd_pid = -1;
1.1 deraadt 390: /* Command to be executed on remote system using "ssh". */
1.55 deraadt 391: (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
392: verbose_mode ? " -v" : "",
1.35 deraadt 393: iamrecursive ? " -r" : "", pflag ? " -p" : "",
394: targetshouldbedirectory ? " -d" : "");
1.1 deraadt 395:
1.18 markus 396: (void) signal(SIGPIPE, lostconn);
1.1 deraadt 397:
398: if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */
399: toremote(targ, argc, argv);
400: else {
401: if (targetshouldbedirectory)
402: verifydir(argv[argc - 1]);
1.130 djm 403: tolocal(argc, argv); /* Dest is local host. */
1.92 markus 404: }
405: /*
406: * Finally check the exit status of the ssh process, if one was forked
407: * and no error has occured yet
408: */
409: if (do_cmd_pid != -1 && errs == 0) {
410: if (remin != -1)
411: (void) close(remin);
412: if (remout != -1)
413: (void) close(remout);
414: if (waitpid(do_cmd_pid, &status, 0) == -1)
415: errs = 1;
416: else {
417: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
418: errs = 1;
419: }
1.1 deraadt 420: }
421: exit(errs != 0);
422: }
423:
424: void
1.104 djm 425: toremote(char *targ, int argc, char **argv)
1.1 deraadt 426: {
1.120 deraadt 427: char *bp, *host, *src, *suser, *thost, *tuser, *arg;
1.129 djm 428: arglist alist;
1.140 deraadt 429: int i;
1.129 djm 430:
431: memset(&alist, '\0', sizeof(alist));
432: alist.list = NULL;
1.1 deraadt 433:
434: *targ++ = 0;
435: if (*targ == 0)
436: targ = ".";
437:
1.121 djm 438: arg = xstrdup(argv[argc - 1]);
1.120 deraadt 439: if ((thost = strrchr(arg, '@'))) {
1.1 deraadt 440: /* user@host */
441: *thost++ = 0;
1.120 deraadt 442: tuser = arg;
1.1 deraadt 443: if (*tuser == '\0')
444: tuser = NULL;
445: } else {
1.120 deraadt 446: thost = arg;
1.1 deraadt 447: tuser = NULL;
448: }
449:
1.129 djm 450: if (tuser != NULL && !okname(tuser)) {
451: xfree(arg);
452: return;
453: }
454:
1.1 deraadt 455: for (i = 0; i < argc - 1; i++) {
456: src = colon(argv[i]);
1.18 markus 457: if (src) { /* remote to remote */
1.129 djm 458: freeargs(&alist);
459: addargs(&alist, "%s", ssh_program);
460: if (verbose_mode)
461: addargs(&alist, "-v");
462: addargs(&alist, "-x");
463: addargs(&alist, "-oClearAllForwardings yes");
464: addargs(&alist, "-n");
465:
1.1 deraadt 466: *src++ = 0;
467: if (*src == 0)
468: src = ".";
1.94 markus 469: host = strrchr(argv[i], '@');
1.129 djm 470:
1.1 deraadt 471: if (host) {
472: *host++ = 0;
1.23 markus 473: host = cleanhostname(host);
1.1 deraadt 474: suser = argv[i];
475: if (*suser == '\0')
476: suser = pwd->pw_name;
1.129 djm 477: else if (!okname(suser))
1.101 markus 478: continue;
1.129 djm 479: addargs(&alist, "-l");
480: addargs(&alist, "%s", suser);
1.23 markus 481: } else {
482: host = cleanhostname(argv[i]);
483: }
1.129 djm 484: addargs(&alist, "%s", host);
485: addargs(&alist, "%s", cmd);
486: addargs(&alist, "%s", src);
487: addargs(&alist, "%s%s%s:%s",
488: tuser ? tuser : "", tuser ? "@" : "",
489: thost, targ);
490: if (do_local_cmd(&alist) != 0)
1.109 markus 491: errs = 1;
1.18 markus 492: } else { /* local to remote */
1.1 deraadt 493: if (remin == -1) {
1.141 djm 494: xasprintf(&bp, "%s -t %s", cmd, targ);
1.23 markus 495: host = cleanhostname(thost);
1.35 deraadt 496: if (do_cmd(host, tuser, bp, &remin,
1.140 deraadt 497: &remout) < 0)
1.18 markus 498: exit(1);
1.1 deraadt 499: if (response() < 0)
500: exit(1);
1.18 markus 501: (void) xfree(bp);
1.1 deraadt 502: }
1.18 markus 503: source(1, argv + i);
1.1 deraadt 504: }
505: }
1.142 markus 506: xfree(arg);
1.1 deraadt 507: }
508:
509: void
1.104 djm 510: tolocal(int argc, char **argv)
1.1 deraadt 511: {
512: char *bp, *host, *src, *suser;
1.129 djm 513: arglist alist;
1.140 deraadt 514: int i;
1.129 djm 515:
516: memset(&alist, '\0', sizeof(alist));
517: alist.list = NULL;
1.1 deraadt 518:
519: for (i = 0; i < argc - 1; i++) {
1.18 markus 520: if (!(src = colon(argv[i]))) { /* Local to local. */
1.129 djm 521: freeargs(&alist);
522: addargs(&alist, "%s", _PATH_CP);
523: if (iamrecursive)
524: addargs(&alist, "-r");
525: if (pflag)
526: addargs(&alist, "-p");
527: addargs(&alist, "%s", argv[i]);
528: addargs(&alist, "%s", argv[argc-1]);
529: if (do_local_cmd(&alist))
1.1 deraadt 530: ++errs;
531: continue;
532: }
533: *src++ = 0;
534: if (*src == 0)
535: src = ".";
1.94 markus 536: if ((host = strrchr(argv[i], '@')) == NULL) {
1.1 deraadt 537: host = argv[i];
538: suser = NULL;
539: } else {
540: *host++ = 0;
541: suser = argv[i];
542: if (*suser == '\0')
543: suser = pwd->pw_name;
544: }
1.23 markus 545: host = cleanhostname(host);
1.141 djm 546: xasprintf(&bp, "%s -f %s", cmd, src);
1.140 deraadt 547: if (do_cmd(host, suser, bp, &remin, &remout) < 0) {
1.18 markus 548: (void) xfree(bp);
549: ++errs;
550: continue;
1.1 deraadt 551: }
1.18 markus 552: xfree(bp);
1.1 deraadt 553: sink(1, argv + argc - 1);
1.18 markus 554: (void) close(remin);
1.1 deraadt 555: remin = remout = -1;
556: }
557: }
558:
559: void
1.104 djm 560: source(int argc, char **argv)
1.1 deraadt 561: {
562: struct stat stb;
563: static BUF buffer;
564: BUF *bp;
1.122 avsm 565: off_t i, amt, statbytes;
566: size_t result;
1.125 dtucker 567: int fd = -1, haderr, indx;
1.1 deraadt 568: char *last, *name, buf[2048];
1.65 deraadt 569: int len;
1.1 deraadt 570:
571: for (indx = 0; indx < argc; ++indx) {
1.18 markus 572: name = argv[indx];
1.11 aaron 573: statbytes = 0;
1.65 deraadt 574: len = strlen(name);
575: while (len > 1 && name[len-1] == '/')
576: name[--len] = '\0';
1.85 markus 577: if (strchr(name, '\n') != NULL) {
578: run_err("%s: skipping, filename contains a newline",
579: name);
580: goto next;
581: }
1.1 deraadt 582: if ((fd = open(name, O_RDONLY, 0)) < 0)
583: goto syserr;
584: if (fstat(fd, &stb) < 0) {
585: syserr: run_err("%s: %s", name, strerror(errno));
586: goto next;
587: }
588: switch (stb.st_mode & S_IFMT) {
589: case S_IFREG:
590: break;
591: case S_IFDIR:
592: if (iamrecursive) {
593: rsource(name, &stb);
594: goto next;
595: }
596: /* FALLTHROUGH */
597: default:
598: run_err("%s: not a regular file", name);
599: goto next;
600: }
601: if ((last = strrchr(name, '/')) == NULL)
602: last = name;
603: else
604: ++last;
1.11 aaron 605: curfile = last;
1.1 deraadt 606: if (pflag) {
607: /*
608: * Make it compatible with possible future
609: * versions expecting microseconds.
610: */
1.55 deraadt 611: (void) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n",
1.47 markus 612: (u_long) stb.st_mtime,
613: (u_long) stb.st_atime);
1.107 deraadt 614: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 615: if (response() < 0)
616: goto next;
617: }
618: #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
1.61 markus 619: snprintf(buf, sizeof buf, "C%04o %lld %s\n",
1.47 markus 620: (u_int) (stb.st_mode & FILEMODEMASK),
1.62 markus 621: (long long)stb.st_size, last);
1.18 markus 622: if (verbose_mode) {
623: fprintf(stderr, "Sending file modes: %s", buf);
624: }
1.107 deraadt 625: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 626: if (response() < 0)
627: goto next;
628: if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) {
1.127 deraadt 629: next: if (fd != -1) {
630: (void) close(fd);
631: fd = -1;
632: }
1.1 deraadt 633: continue;
634: }
1.97 fgsch 635: if (showprogress)
636: start_progress_meter(curfile, stb.st_size, &statbytes);
1.1 deraadt 637: /* Keep writing after an error so that we stay sync'd up. */
638: for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
639: amt = bp->cnt;
640: if (i + amt > stb.st_size)
641: amt = stb.st_size - i;
642: if (!haderr) {
1.30 deraadt 643: result = atomicio(read, fd, bp->buf, amt);
1.1 deraadt 644: if (result != amt)
1.122 avsm 645: haderr = errno;
1.1 deraadt 646: }
647: if (haderr)
1.107 deraadt 648: (void) atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 649: else {
1.107 deraadt 650: result = atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 651: if (result != amt)
1.122 avsm 652: haderr = errno;
1.4 aaron 653: statbytes += result;
1.1 deraadt 654: }
1.113 djm 655: if (limit_rate)
1.99 markus 656: bwlimit(amt);
1.1 deraadt 657: }
1.18 markus 658: if (showprogress)
1.97 fgsch 659: stop_progress_meter();
1.4 aaron 660:
1.127 deraadt 661: if (fd != -1) {
662: if (close(fd) < 0 && !haderr)
663: haderr = errno;
664: fd = -1;
665: }
1.1 deraadt 666: if (!haderr)
1.107 deraadt 667: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 668: else
669: run_err("%s: %s", name, strerror(haderr));
1.18 markus 670: (void) response();
1.1 deraadt 671: }
672: }
673:
674: void
1.104 djm 675: rsource(char *name, struct stat *statp)
1.1 deraadt 676: {
677: DIR *dirp;
678: struct dirent *dp;
679: char *last, *vect[1], path[1100];
680:
681: if (!(dirp = opendir(name))) {
682: run_err("%s: %s", name, strerror(errno));
683: return;
684: }
685: last = strrchr(name, '/');
686: if (last == 0)
687: last = name;
688: else
689: last++;
690: if (pflag) {
1.55 deraadt 691: (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n",
1.47 markus 692: (u_long) statp->st_mtime,
693: (u_long) statp->st_atime);
1.107 deraadt 694: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 695: if (response() < 0) {
696: closedir(dirp);
697: return;
698: }
699: }
1.55 deraadt 700: (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n",
1.47 markus 701: (u_int) (statp->st_mode & FILEMODEMASK), 0, last);
1.18 markus 702: if (verbose_mode)
703: fprintf(stderr, "Entering directory: %s", path);
1.107 deraadt 704: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 705: if (response() < 0) {
706: closedir(dirp);
707: return;
708: }
1.63 stevesk 709: while ((dp = readdir(dirp)) != NULL) {
1.1 deraadt 710: if (dp->d_ino == 0)
711: continue;
712: if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
713: continue;
714: if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) {
715: run_err("%s/%s: name too long", name, dp->d_name);
716: continue;
717: }
1.55 deraadt 718: (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name);
1.1 deraadt 719: vect[0] = path;
720: source(1, vect);
721: }
1.18 markus 722: (void) closedir(dirp);
1.107 deraadt 723: (void) atomicio(vwrite, remout, "E\n", 2);
1.18 markus 724: (void) response();
1.1 deraadt 725: }
726:
727: void
1.99 markus 728: bwlimit(int amount)
729: {
730: static struct timeval bwstart, bwend;
731: static int lamt, thresh = 16384;
1.115 avsm 732: u_int64_t waitlen;
1.99 markus 733: struct timespec ts, rm;
734:
735: if (!timerisset(&bwstart)) {
736: gettimeofday(&bwstart, NULL);
737: return;
738: }
739:
740: lamt += amount;
741: if (lamt < thresh)
742: return;
743:
744: gettimeofday(&bwend, NULL);
745: timersub(&bwend, &bwstart, &bwend);
746: if (!timerisset(&bwend))
747: return;
748:
749: lamt *= 8;
1.115 avsm 750: waitlen = (double)1000000L * lamt / limit_rate;
1.99 markus 751:
1.115 avsm 752: bwstart.tv_sec = waitlen / 1000000L;
753: bwstart.tv_usec = waitlen % 1000000L;
1.99 markus 754:
755: if (timercmp(&bwstart, &bwend, >)) {
756: timersub(&bwstart, &bwend, &bwend);
757:
758: /* Adjust the wait time */
759: if (bwend.tv_sec) {
760: thresh /= 2;
761: if (thresh < 2048)
762: thresh = 2048;
763: } else if (bwend.tv_usec < 100) {
764: thresh *= 2;
765: if (thresh > 32768)
766: thresh = 32768;
767: }
768:
769: TIMEVAL_TO_TIMESPEC(&bwend, &ts);
770: while (nanosleep(&ts, &rm) == -1) {
771: if (errno != EINTR)
772: break;
773: ts = rm;
774: }
775: }
776:
777: lamt = 0;
778: gettimeofday(&bwstart, NULL);
779: }
780:
781: void
1.104 djm 782: sink(int argc, char **argv)
1.1 deraadt 783: {
784: static BUF buffer;
785: struct stat stb;
1.18 markus 786: enum {
787: YES, NO, DISPLAYED
788: } wrerr;
1.1 deraadt 789: BUF *bp;
1.122 avsm 790: off_t i;
1.124 djm 791: size_t j, count;
1.140 deraadt 792: int amt, exists, first, ofd;
793: mode_t mode, omode, mask;
1.97 fgsch 794: off_t size, statbytes;
1.36 deraadt 795: int setimes, targisdir, wrerrno = 0;
1.1 deraadt 796: char ch, *cp, *np, *targ, *why, *vect[1], buf[2048];
1.40 markus 797: struct timeval tv[2];
1.1 deraadt 798:
1.66 stevesk 799: #define atime tv[0]
800: #define mtime tv[1]
1.118 deraadt 801: #define SCREWUP(str) { why = str; goto screwup; }
1.1 deraadt 802:
803: setimes = targisdir = 0;
804: mask = umask(0);
805: if (!pflag)
1.18 markus 806: (void) umask(mask);
1.1 deraadt 807: if (argc != 1) {
808: run_err("ambiguous target");
809: exit(1);
810: }
811: targ = *argv;
812: if (targetshouldbedirectory)
813: verifydir(targ);
1.18 markus 814:
1.107 deraadt 815: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 816: if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
817: targisdir = 1;
818: for (first = 1;; first = 0) {
819: cp = buf;
1.122 avsm 820: if (atomicio(read, remin, cp, 1) != 1)
1.1 deraadt 821: return;
822: if (*cp++ == '\n')
823: SCREWUP("unexpected <newline>");
824: do {
1.30 deraadt 825: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 826: SCREWUP("lost connection");
827: *cp++ = ch;
828: } while (cp < &buf[sizeof(buf) - 1] && ch != '\n');
829: *cp = 0;
1.114 markus 830: if (verbose_mode)
831: fprintf(stderr, "Sink: %s", buf);
1.1 deraadt 832:
833: if (buf[0] == '\01' || buf[0] == '\02') {
834: if (iamremote == 0)
1.107 deraadt 835: (void) atomicio(vwrite, STDERR_FILENO,
1.44 deraadt 836: buf + 1, strlen(buf + 1));
1.1 deraadt 837: if (buf[0] == '\02')
838: exit(1);
839: ++errs;
840: continue;
841: }
842: if (buf[0] == 'E') {
1.107 deraadt 843: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 844: return;
845: }
846: if (ch == '\n')
847: *--cp = 0;
848:
849: cp = buf;
850: if (*cp == 'T') {
851: setimes++;
852: cp++;
1.66 stevesk 853: mtime.tv_sec = strtol(cp, &cp, 10);
854: if (!cp || *cp++ != ' ')
1.1 deraadt 855: SCREWUP("mtime.sec not delimited");
1.66 stevesk 856: mtime.tv_usec = strtol(cp, &cp, 10);
857: if (!cp || *cp++ != ' ')
1.1 deraadt 858: SCREWUP("mtime.usec not delimited");
1.66 stevesk 859: atime.tv_sec = strtol(cp, &cp, 10);
860: if (!cp || *cp++ != ' ')
1.1 deraadt 861: SCREWUP("atime.sec not delimited");
1.66 stevesk 862: atime.tv_usec = strtol(cp, &cp, 10);
863: if (!cp || *cp++ != '\0')
1.1 deraadt 864: SCREWUP("atime.usec not delimited");
1.107 deraadt 865: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 866: continue;
867: }
868: if (*cp != 'C' && *cp != 'D') {
869: /*
870: * Check for the case "rcp remote:foo\* local:bar".
871: * In this case, the line "No match." can be returned
872: * by the shell before the rcp command on the remote is
873: * executed so the ^Aerror_message convention isn't
874: * followed.
875: */
876: if (first) {
877: run_err("%s", cp);
878: exit(1);
879: }
880: SCREWUP("expected control record");
881: }
882: mode = 0;
883: for (++cp; cp < buf + 5; cp++) {
884: if (*cp < '0' || *cp > '7')
885: SCREWUP("bad mode");
886: mode = (mode << 3) | (*cp - '0');
887: }
888: if (*cp++ != ' ')
889: SCREWUP("mode not delimited");
890:
1.63 stevesk 891: for (size = 0; isdigit(*cp);)
1.1 deraadt 892: size = size * 10 + (*cp++ - '0');
893: if (*cp++ != ' ')
894: SCREWUP("size not delimited");
1.114 markus 895: if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) {
896: run_err("error: unexpected filename: %s", cp);
897: exit(1);
898: }
1.1 deraadt 899: if (targisdir) {
900: static char *namebuf;
1.124 djm 901: static size_t cursize;
1.1 deraadt 902: size_t need;
903:
904: need = strlen(targ) + strlen(cp) + 250;
1.55 deraadt 905: if (need > cursize) {
1.58 danh 906: if (namebuf)
907: xfree(namebuf);
1.18 markus 908: namebuf = xmalloc(need);
1.55 deraadt 909: cursize = need;
910: }
911: (void) snprintf(namebuf, need, "%s%s%s", targ,
1.88 mouring 912: strcmp(targ, "/") ? "/" : "", cp);
1.1 deraadt 913: np = namebuf;
914: } else
915: np = targ;
1.12 aaron 916: curfile = cp;
1.1 deraadt 917: exists = stat(np, &stb) == 0;
918: if (buf[0] == 'D') {
919: int mod_flag = pflag;
1.114 markus 920: if (!iamrecursive)
921: SCREWUP("received directory without -r");
1.1 deraadt 922: if (exists) {
923: if (!S_ISDIR(stb.st_mode)) {
924: errno = ENOTDIR;
925: goto bad;
926: }
927: if (pflag)
1.18 markus 928: (void) chmod(np, mode);
1.1 deraadt 929: } else {
1.18 markus 930: /* Handle copying from a read-only
931: directory */
1.1 deraadt 932: mod_flag = 1;
933: if (mkdir(np, mode | S_IRWXU) < 0)
934: goto bad;
935: }
1.58 danh 936: vect[0] = xstrdup(np);
1.1 deraadt 937: sink(1, vect);
938: if (setimes) {
939: setimes = 0;
1.59 deraadt 940: if (utimes(vect[0], tv) < 0)
1.18 markus 941: run_err("%s: set times: %s",
1.59 deraadt 942: vect[0], strerror(errno));
1.1 deraadt 943: }
944: if (mod_flag)
1.59 deraadt 945: (void) chmod(vect[0], mode);
946: if (vect[0])
947: xfree(vect[0]);
1.1 deraadt 948: continue;
949: }
950: omode = mode;
951: mode |= S_IWRITE;
1.71 markus 952: if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
1.1 deraadt 953: bad: run_err("%s: %s", np, strerror(errno));
954: continue;
955: }
1.107 deraadt 956: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 957: if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) {
1.18 markus 958: (void) close(ofd);
1.1 deraadt 959: continue;
960: }
961: cp = bp->buf;
962: wrerr = NO;
1.7 deraadt 963:
1.12 aaron 964: statbytes = 0;
1.97 fgsch 965: if (showprogress)
966: start_progress_meter(curfile, size, &statbytes);
1.1 deraadt 967: for (count = i = 0; i < size; i += 4096) {
968: amt = 4096;
969: if (i + amt > size)
970: amt = size - i;
971: count += amt;
972: do {
1.117 avsm 973: j = atomicio(read, remin, cp, amt);
1.122 avsm 974: if (j == 0) {
1.1 deraadt 975: run_err("%s", j ? strerror(errno) :
1.63 stevesk 976: "dropped connection");
1.1 deraadt 977: exit(1);
978: }
979: amt -= j;
980: cp += j;
1.18 markus 981: statbytes += j;
1.1 deraadt 982: } while (amt > 0);
1.112 djm 983:
1.113 djm 984: if (limit_rate)
1.99 markus 985: bwlimit(4096);
986:
1.1 deraadt 987: if (count == bp->cnt) {
988: /* Keep reading so we stay sync'd up. */
989: if (wrerr == NO) {
1.122 avsm 990: if (atomicio(vwrite, ofd, bp->buf,
991: count) != count) {
1.1 deraadt 992: wrerr = YES;
1.122 avsm 993: wrerrno = errno;
1.1 deraadt 994: }
995: }
996: count = 0;
997: cp = bp->buf;
998: }
999: }
1.7 deraadt 1000: if (showprogress)
1.97 fgsch 1001: stop_progress_meter();
1.1 deraadt 1002: if (count != 0 && wrerr == NO &&
1.122 avsm 1003: atomicio(vwrite, ofd, bp->buf, count) != count) {
1.1 deraadt 1004: wrerr = YES;
1.122 avsm 1005: wrerrno = errno;
1.1 deraadt 1006: }
1.98 djm 1007: if (wrerr == NO && ftruncate(ofd, size) != 0) {
1.1 deraadt 1008: run_err("%s: truncate: %s", np, strerror(errno));
1009: wrerr = DISPLAYED;
1010: }
1011: if (pflag) {
1012: if (exists || omode != mode)
1.116 dtucker 1013: if (fchmod(ofd, omode)) {
1.1 deraadt 1014: run_err("%s: set mode: %s",
1.63 stevesk 1015: np, strerror(errno));
1.116 dtucker 1016: wrerr = DISPLAYED;
1017: }
1.1 deraadt 1018: } else {
1019: if (!exists && omode != mode)
1.116 dtucker 1020: if (fchmod(ofd, omode & ~mask)) {
1.1 deraadt 1021: run_err("%s: set mode: %s",
1.63 stevesk 1022: np, strerror(errno));
1.116 dtucker 1023: wrerr = DISPLAYED;
1024: }
1.1 deraadt 1025: }
1.33 provos 1026: if (close(ofd) == -1) {
1027: wrerr = YES;
1028: wrerrno = errno;
1029: }
1.18 markus 1030: (void) response();
1.1 deraadt 1031: if (setimes && wrerr == NO) {
1032: setimes = 0;
1.40 markus 1033: if (utimes(np, tv) < 0) {
1.1 deraadt 1034: run_err("%s: set times: %s",
1.63 stevesk 1035: np, strerror(errno));
1.1 deraadt 1036: wrerr = DISPLAYED;
1037: }
1038: }
1.18 markus 1039: switch (wrerr) {
1.1 deraadt 1040: case YES:
1041: run_err("%s: %s", np, strerror(wrerrno));
1042: break;
1043: case NO:
1.107 deraadt 1044: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 1045: break;
1046: case DISPLAYED:
1047: break;
1048: }
1049: }
1050: screwup:
1051: run_err("protocol error: %s", why);
1052: exit(1);
1053: }
1054:
1055: int
1.86 itojun 1056: response(void)
1.1 deraadt 1057: {
1058: char ch, *cp, resp, rbuf[2048];
1059:
1.30 deraadt 1060: if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp))
1.1 deraadt 1061: lostconn(0);
1062:
1063: cp = rbuf;
1.18 markus 1064: switch (resp) {
1065: case 0: /* ok */
1.1 deraadt 1066: return (0);
1067: default:
1068: *cp++ = resp;
1069: /* FALLTHROUGH */
1.18 markus 1070: case 1: /* error, followed by error msg */
1071: case 2: /* fatal error, "" */
1.1 deraadt 1072: do {
1.30 deraadt 1073: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 1074: lostconn(0);
1075: *cp++ = ch;
1076: } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
1077:
1078: if (!iamremote)
1.107 deraadt 1079: (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf);
1.1 deraadt 1080: ++errs;
1081: if (resp == 1)
1082: return (-1);
1083: exit(1);
1084: }
1085: /* NOTREACHED */
1086: }
1087:
1088: void
1.86 itojun 1089: usage(void)
1.1 deraadt 1090: {
1.83 stevesk 1091: (void) fprintf(stderr,
1.110 jmc 1092: "usage: scp [-1246BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n"
1093: " [-l limit] [-o ssh_option] [-P port] [-S program]\n"
1.90 deraadt 1094: " [[user@]host1:]file1 [...] [[user@]host2:]file2\n");
1.1 deraadt 1095: exit(1);
1096: }
1097:
1098: void
1.18 markus 1099: run_err(const char *fmt,...)
1.1 deraadt 1100: {
1101: static FILE *fp;
1102: va_list ap;
1103:
1104: ++errs;
1.136 biorn 1105: if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) {
1106: (void) fprintf(fp, "%c", 0x01);
1107: (void) fprintf(fp, "scp: ");
1108: va_start(ap, fmt);
1109: (void) vfprintf(fp, fmt, ap);
1110: va_end(ap);
1111: (void) fprintf(fp, "\n");
1112: (void) fflush(fp);
1113: }
1.18 markus 1114:
1115: if (!iamremote) {
1.73 markus 1116: va_start(ap, fmt);
1.18 markus 1117: vfprintf(stderr, fmt, ap);
1.73 markus 1118: va_end(ap);
1.18 markus 1119: fprintf(stderr, "\n");
1120: }
1.1 deraadt 1121: }
1122:
1123: void
1.104 djm 1124: verifydir(char *cp)
1.1 deraadt 1125: {
1126: struct stat stb;
1127:
1128: if (!stat(cp, &stb)) {
1129: if (S_ISDIR(stb.st_mode))
1130: return;
1131: errno = ENOTDIR;
1132: }
1133: run_err("%s: %s", cp, strerror(errno));
1.123 avsm 1134: killchild(0);
1.1 deraadt 1135: }
1136:
1137: int
1.104 djm 1138: okname(char *cp0)
1.1 deraadt 1139: {
1140: int c;
1141: char *cp;
1142:
1143: cp = cp0;
1144: do {
1.75 deraadt 1145: c = (int)*cp;
1.1 deraadt 1146: if (c & 0200)
1147: goto bad;
1.101 markus 1148: if (!isalpha(c) && !isdigit(c)) {
1149: switch (c) {
1150: case '\'':
1151: case '"':
1152: case '`':
1153: case ' ':
1154: case '#':
1155: goto bad;
1156: default:
1157: break;
1158: }
1159: }
1.1 deraadt 1160: } while (*++cp);
1161: return (1);
1162:
1.25 markus 1163: bad: fprintf(stderr, "%s: invalid user name\n", cp0);
1.1 deraadt 1164: return (0);
1165: }
1166:
1167: BUF *
1.104 djm 1168: allocbuf(BUF *bp, int fd, int blksize)
1.1 deraadt 1169: {
1170: size_t size;
1171: struct stat stb;
1172:
1173: if (fstat(fd, &stb) < 0) {
1174: run_err("fstat: %s", strerror(errno));
1175: return (0);
1176: }
1.95 markus 1177: size = roundup(stb.st_blksize, blksize);
1178: if (size == 0)
1.18 markus 1179: size = blksize;
1.1 deraadt 1180: if (bp->cnt >= size)
1181: return (bp);
1.18 markus 1182: if (bp->buf == NULL)
1183: bp->buf = xmalloc(size);
1184: else
1.138 djm 1185: bp->buf = xrealloc(bp->buf, 1, size);
1.81 markus 1186: memset(bp->buf, 0, size);
1.1 deraadt 1187: bp->cnt = size;
1188: return (bp);
1189: }
1190:
1191: void
1.104 djm 1192: lostconn(int signo)
1.1 deraadt 1193: {
1194: if (!iamremote)
1.74 markus 1195: write(STDERR_FILENO, "lost connection\n", 16);
1196: if (signo)
1197: _exit(1);
1198: else
1199: exit(1);
1.4 aaron 1200: }
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