Annotation of src/usr.bin/ssh/scp.c, Revision 1.156
1.156 ! djm 1: /* $OpenBSD: scp.c,v 1.155 2006/08/03 03:34:42 deraadt 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:
1.155 deraadt 74: #include <sys/param.h>
1.132 stevesk 75: #include <sys/types.h>
76: #include <sys/wait.h>
1.134 stevesk 77: #include <sys/stat.h>
1.151 stevesk 78: #include <sys/time.h>
1.155 deraadt 79: #include <sys/uio.h>
1.131 stevesk 80:
1.135 stevesk 81: #include <ctype.h>
1.131 stevesk 82: #include <dirent.h>
1.147 stevesk 83: #include <errno.h>
1.144 stevesk 84: #include <fcntl.h>
1.143 stevesk 85: #include <pwd.h>
1.133 stevesk 86: #include <signal.h>
1.146 stevesk 87: #include <stdarg.h>
1.154 stevesk 88: #include <stdio.h>
1.153 stevesk 89: #include <stdlib.h>
1.150 stevesk 90: #include <string.h>
1.149 stevesk 91: #include <time.h>
1.148 stevesk 92: #include <unistd.h>
1.1 deraadt 93:
94: #include "xmalloc.h"
1.51 markus 95: #include "atomicio.h"
1.50 markus 96: #include "pathnames.h"
1.51 markus 97: #include "log.h"
1.69 mouring 98: #include "misc.h"
1.97 fgsch 99: #include "progressmeter.h"
1.1 deraadt 100:
1.140 deraadt 101: int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout);
1.11 aaron 102:
1.99 markus 103: void bwlimit(int);
104:
1.70 mouring 105: /* Struct for addargs */
106: arglist args;
1.41 markus 107:
1.99 markus 108: /* Bandwidth limit */
1.113 djm 109: off_t limit_rate = 0;
1.99 markus 110:
1.11 aaron 111: /* Name of current file being transferred. */
112: char *curfile;
1.4 aaron 113:
1.1 deraadt 114: /* This is set to non-zero to enable verbose mode. */
1.17 markus 115: int verbose_mode = 0;
1.1 deraadt 116:
1.6 aaron 117: /* This is set to zero if the progressmeter is not desired. */
118: int showprogress = 1;
119:
1.34 deraadt 120: /* This is the program to execute for the secured connection. ("ssh" or -S) */
1.50 markus 121: char *ssh_program = _PATH_SSH_PROGRAM;
1.34 deraadt 122:
1.92 markus 123: /* This is used to store the pid of ssh_program */
1.105 djm 124: pid_t do_cmd_pid = -1;
125:
126: static void
127: killchild(int signo)
128: {
1.119 dtucker 129: if (do_cmd_pid > 1) {
1.123 avsm 130: kill(do_cmd_pid, signo ? signo : SIGTERM);
1.119 dtucker 131: waitpid(do_cmd_pid, NULL, 0);
132: }
1.105 djm 133:
1.123 avsm 134: if (signo)
135: _exit(1);
136: exit(1);
1.105 djm 137: }
1.92 markus 138:
1.129 djm 139: static int
140: do_local_cmd(arglist *a)
141: {
142: u_int i;
143: int status;
144: pid_t pid;
145:
146: if (a->num == 0)
147: fatal("do_local_cmd: no arguments");
148:
149: if (verbose_mode) {
150: fprintf(stderr, "Executing:");
151: for (i = 0; i < a->num; i++)
152: fprintf(stderr, " %s", a->list[i]);
153: fprintf(stderr, "\n");
154: }
155: if ((pid = fork()) == -1)
156: fatal("do_local_cmd: fork: %s", strerror(errno));
157:
158: if (pid == 0) {
159: execvp(a->list[0], a->list);
160: perror(a->list[0]);
161: exit(1);
162: }
163:
164: do_cmd_pid = pid;
165: signal(SIGTERM, killchild);
166: signal(SIGINT, killchild);
167: signal(SIGHUP, killchild);
168:
169: while (waitpid(pid, &status, 0) == -1)
170: if (errno != EINTR)
171: fatal("do_local_cmd: waitpid: %s", strerror(errno));
172:
173: do_cmd_pid = -1;
174:
175: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
176: return (-1);
177:
178: return (0);
179: }
180:
1.20 markus 181: /*
182: * This function executes the given command as the specified user on the
183: * given host. This returns < 0 if execution fails, and >= 0 otherwise. This
184: * assigns the input and output file descriptors on success.
185: */
1.1 deraadt 186:
1.27 markus 187: int
1.140 deraadt 188: do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout)
1.1 deraadt 189: {
1.18 markus 190: int pin[2], pout[2], reserved[2];
191:
192: if (verbose_mode)
1.78 deraadt 193: fprintf(stderr,
194: "Executing: program %s host %s, user %s, command %s\n",
195: ssh_program, host,
196: remuser ? remuser : "(unspecified)", cmd);
1.18 markus 197:
1.20 markus 198: /*
199: * Reserve two descriptors so that the real pipes won't get
200: * descriptors 0 and 1 because that will screw up dup2 below.
201: */
1.142 markus 202: if (pipe(reserved) < 0)
203: fatal("pipe: %s", strerror(errno));
1.18 markus 204:
205: /* Create a socket pair for communicating with ssh. */
206: if (pipe(pin) < 0)
207: fatal("pipe: %s", strerror(errno));
208: if (pipe(pout) < 0)
209: fatal("pipe: %s", strerror(errno));
210:
211: /* Free the reserved descriptors. */
212: close(reserved[0]);
213: close(reserved[1]);
214:
1.106 nino 215: /* Fork a child to execute the command on the remote host using ssh. */
1.92 markus 216: do_cmd_pid = fork();
217: if (do_cmd_pid == 0) {
1.18 markus 218: /* Child. */
219: close(pin[1]);
220: close(pout[0]);
221: dup2(pin[0], 0);
222: dup2(pout[1], 1);
223: close(pin[0]);
224: close(pout[1]);
225:
1.129 djm 226: replacearg(&args, 0, "%s", ssh_program);
1.41 markus 227: if (remuser != NULL)
1.70 mouring 228: addargs(&args, "-l%s", remuser);
229: addargs(&args, "%s", host);
230: addargs(&args, "%s", cmd);
1.18 markus 231:
1.41 markus 232: execvp(ssh_program, args.list);
1.34 deraadt 233: perror(ssh_program);
1.18 markus 234: exit(1);
1.92 markus 235: } else if (do_cmd_pid == -1) {
236: fatal("fork: %s", strerror(errno));
1.18 markus 237: }
238: /* Parent. Close the other side, and return the local side. */
239: close(pin[0]);
240: *fdout = pin[1];
241: close(pout[1]);
242: *fdin = pout[0];
1.105 djm 243: signal(SIGTERM, killchild);
244: signal(SIGINT, killchild);
245: signal(SIGHUP, killchild);
1.18 markus 246: return 0;
1.1 deraadt 247: }
248:
249: typedef struct {
1.124 djm 250: size_t cnt;
1.1 deraadt 251: char *buf;
252: } BUF;
253:
1.18 markus 254: BUF *allocbuf(BUF *, int, int);
255: void lostconn(int);
256: int okname(char *);
257: void run_err(const char *,...);
258: void verifydir(char *);
1.1 deraadt 259:
260: struct passwd *pwd;
1.18 markus 261: uid_t userid;
1.1 deraadt 262: int errs, remin, remout;
263: int pflag, iamremote, iamrecursive, targetshouldbedirectory;
264:
265: #define CMDNEEDS 64
266: char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
267:
1.18 markus 268: int response(void);
269: void rsource(char *, struct stat *);
270: void sink(int, char *[]);
271: void source(int, char *[]);
272: void tolocal(int, char *[]);
273: void toremote(char *, int, char *[]);
274: void usage(void);
1.1 deraadt 275:
276: int
1.104 djm 277: main(int argc, char **argv)
1.1 deraadt 278: {
1.145 djm 279: int ch, fflag, tflag, status, n;
1.99 markus 280: double speed;
1.145 djm 281: char *targ, *endp, **newargv;
1.1 deraadt 282: extern char *optarg;
283: extern int optind;
1.126 djm 284:
285: /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
286: sanitise_stdfd();
1.145 djm 287:
288: /* Copy argv, because we modify it */
289: newargv = xcalloc(MAX(argc + 1, 1), sizeof(*newargv));
290: for (n = 0; n < argc; n++)
291: newargv[n] = xstrdup(argv[n]);
292: argv = newargv;
1.1 deraadt 293:
1.129 djm 294: memset(&args, '\0', sizeof(args));
1.41 markus 295: args.list = NULL;
1.129 djm 296: addargs(&args, "%s", ssh_program);
1.70 mouring 297: addargs(&args, "-x");
1.82 stevesk 298: addargs(&args, "-oForwardAgent no");
1.128 reyk 299: addargs(&args, "-oPermitLocalCommand no");
1.84 stevesk 300: addargs(&args, "-oClearAllForwardings yes");
1.41 markus 301:
1.1 deraadt 302: fflag = tflag = 0;
1.100 markus 303: while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q1246S:o:F:")) != -1)
1.18 markus 304: switch (ch) {
305: /* User-visible flags. */
1.100 markus 306: case '1':
307: case '2':
1.23 markus 308: case '4':
1.41 markus 309: case '6':
310: case 'C':
1.70 mouring 311: addargs(&args, "-%c", ch);
1.41 markus 312: break;
313: case 'o':
314: case 'c':
315: case 'i':
1.83 stevesk 316: case 'F':
1.70 mouring 317: addargs(&args, "-%c%s", ch, optarg);
1.23 markus 318: break;
1.41 markus 319: case 'P':
1.70 mouring 320: addargs(&args, "-p%s", optarg);
1.41 markus 321: break;
322: case 'B':
1.70 mouring 323: addargs(&args, "-oBatchmode yes");
1.23 markus 324: break;
1.99 markus 325: case 'l':
326: speed = strtod(optarg, &endp);
327: if (speed <= 0 || *endp != '\0')
328: usage();
1.113 djm 329: limit_rate = speed * 1024;
1.99 markus 330: break;
1.1 deraadt 331: case 'p':
332: pflag = 1;
333: break;
334: case 'r':
335: iamrecursive = 1;
336: break;
1.34 deraadt 337: case 'S':
1.41 markus 338: ssh_program = xstrdup(optarg);
339: break;
340: case 'v':
1.72 markus 341: addargs(&args, "-v");
1.41 markus 342: verbose_mode = 1;
343: break;
344: case 'q':
1.111 dtucker 345: addargs(&args, "-q");
1.41 markus 346: showprogress = 0;
1.34 deraadt 347: break;
348:
1.18 markus 349: /* Server options. */
1.1 deraadt 350: case 'd':
351: targetshouldbedirectory = 1;
352: break;
1.18 markus 353: case 'f': /* "from" */
1.1 deraadt 354: iamremote = 1;
355: fflag = 1;
356: break;
1.18 markus 357: case 't': /* "to" */
1.1 deraadt 358: iamremote = 1;
359: tflag = 1;
360: break;
361: default:
362: usage();
363: }
364: argc -= optind;
365: argv += optind;
366:
367: if ((pwd = getpwuid(userid = getuid())) == NULL)
1.108 deraadt 368: fatal("unknown user %u", (u_int) userid);
1.1 deraadt 369:
1.156 ! djm 370: if (!isatty(STDOUT_FILENO))
1.7 deraadt 371: showprogress = 0;
372:
1.1 deraadt 373: remin = STDIN_FILENO;
374: remout = STDOUT_FILENO;
375:
1.52 stevesk 376: if (fflag) {
1.18 markus 377: /* Follow "protocol", send data. */
378: (void) response();
1.1 deraadt 379: source(argc, argv);
380: exit(errs != 0);
381: }
1.18 markus 382: if (tflag) {
383: /* Receive data. */
1.1 deraadt 384: sink(argc, argv);
385: exit(errs != 0);
386: }
387: if (argc < 2)
388: usage();
389: if (argc > 2)
390: targetshouldbedirectory = 1;
391:
392: remin = remout = -1;
1.92 markus 393: do_cmd_pid = -1;
1.1 deraadt 394: /* Command to be executed on remote system using "ssh". */
1.55 deraadt 395: (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
396: verbose_mode ? " -v" : "",
1.35 deraadt 397: iamrecursive ? " -r" : "", pflag ? " -p" : "",
398: targetshouldbedirectory ? " -d" : "");
1.1 deraadt 399:
1.18 markus 400: (void) signal(SIGPIPE, lostconn);
1.1 deraadt 401:
402: if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */
403: toremote(targ, argc, argv);
404: else {
405: if (targetshouldbedirectory)
406: verifydir(argv[argc - 1]);
1.130 djm 407: tolocal(argc, argv); /* Dest is local host. */
1.92 markus 408: }
409: /*
410: * Finally check the exit status of the ssh process, if one was forked
411: * and no error has occured yet
412: */
413: if (do_cmd_pid != -1 && errs == 0) {
414: if (remin != -1)
415: (void) close(remin);
416: if (remout != -1)
417: (void) close(remout);
418: if (waitpid(do_cmd_pid, &status, 0) == -1)
419: errs = 1;
420: else {
421: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
422: errs = 1;
423: }
1.1 deraadt 424: }
425: exit(errs != 0);
426: }
427:
428: void
1.104 djm 429: toremote(char *targ, int argc, char **argv)
1.1 deraadt 430: {
1.120 deraadt 431: char *bp, *host, *src, *suser, *thost, *tuser, *arg;
1.129 djm 432: arglist alist;
1.140 deraadt 433: int i;
1.129 djm 434:
435: memset(&alist, '\0', sizeof(alist));
436: alist.list = NULL;
1.1 deraadt 437:
438: *targ++ = 0;
439: if (*targ == 0)
440: targ = ".";
441:
1.121 djm 442: arg = xstrdup(argv[argc - 1]);
1.120 deraadt 443: if ((thost = strrchr(arg, '@'))) {
1.1 deraadt 444: /* user@host */
445: *thost++ = 0;
1.120 deraadt 446: tuser = arg;
1.1 deraadt 447: if (*tuser == '\0')
448: tuser = NULL;
449: } else {
1.120 deraadt 450: thost = arg;
1.1 deraadt 451: tuser = NULL;
452: }
453:
1.129 djm 454: if (tuser != NULL && !okname(tuser)) {
455: xfree(arg);
456: return;
457: }
458:
1.1 deraadt 459: for (i = 0; i < argc - 1; i++) {
460: src = colon(argv[i]);
1.18 markus 461: if (src) { /* remote to remote */
1.129 djm 462: freeargs(&alist);
463: addargs(&alist, "%s", ssh_program);
464: if (verbose_mode)
465: addargs(&alist, "-v");
466: addargs(&alist, "-x");
467: addargs(&alist, "-oClearAllForwardings yes");
468: addargs(&alist, "-n");
469:
1.1 deraadt 470: *src++ = 0;
471: if (*src == 0)
472: src = ".";
1.94 markus 473: host = strrchr(argv[i], '@');
1.129 djm 474:
1.1 deraadt 475: if (host) {
476: *host++ = 0;
1.23 markus 477: host = cleanhostname(host);
1.1 deraadt 478: suser = argv[i];
479: if (*suser == '\0')
480: suser = pwd->pw_name;
1.129 djm 481: else if (!okname(suser))
1.101 markus 482: continue;
1.129 djm 483: addargs(&alist, "-l");
484: addargs(&alist, "%s", suser);
1.23 markus 485: } else {
486: host = cleanhostname(argv[i]);
487: }
1.129 djm 488: addargs(&alist, "%s", host);
489: addargs(&alist, "%s", cmd);
490: addargs(&alist, "%s", src);
491: addargs(&alist, "%s%s%s:%s",
492: tuser ? tuser : "", tuser ? "@" : "",
493: thost, targ);
494: if (do_local_cmd(&alist) != 0)
1.109 markus 495: errs = 1;
1.18 markus 496: } else { /* local to remote */
1.1 deraadt 497: if (remin == -1) {
1.141 djm 498: xasprintf(&bp, "%s -t %s", cmd, targ);
1.23 markus 499: host = cleanhostname(thost);
1.35 deraadt 500: if (do_cmd(host, tuser, bp, &remin,
1.140 deraadt 501: &remout) < 0)
1.18 markus 502: exit(1);
1.1 deraadt 503: if (response() < 0)
504: exit(1);
1.18 markus 505: (void) xfree(bp);
1.1 deraadt 506: }
1.18 markus 507: source(1, argv + i);
1.1 deraadt 508: }
509: }
1.142 markus 510: xfree(arg);
1.1 deraadt 511: }
512:
513: void
1.104 djm 514: tolocal(int argc, char **argv)
1.1 deraadt 515: {
516: char *bp, *host, *src, *suser;
1.129 djm 517: arglist alist;
1.140 deraadt 518: int i;
1.129 djm 519:
520: memset(&alist, '\0', sizeof(alist));
521: alist.list = NULL;
1.1 deraadt 522:
523: for (i = 0; i < argc - 1; i++) {
1.18 markus 524: if (!(src = colon(argv[i]))) { /* Local to local. */
1.129 djm 525: freeargs(&alist);
526: addargs(&alist, "%s", _PATH_CP);
527: if (iamrecursive)
528: addargs(&alist, "-r");
529: if (pflag)
530: addargs(&alist, "-p");
531: addargs(&alist, "%s", argv[i]);
532: addargs(&alist, "%s", argv[argc-1]);
533: if (do_local_cmd(&alist))
1.1 deraadt 534: ++errs;
535: continue;
536: }
537: *src++ = 0;
538: if (*src == 0)
539: src = ".";
1.94 markus 540: if ((host = strrchr(argv[i], '@')) == NULL) {
1.1 deraadt 541: host = argv[i];
542: suser = NULL;
543: } else {
544: *host++ = 0;
545: suser = argv[i];
546: if (*suser == '\0')
547: suser = pwd->pw_name;
548: }
1.23 markus 549: host = cleanhostname(host);
1.141 djm 550: xasprintf(&bp, "%s -f %s", cmd, src);
1.140 deraadt 551: if (do_cmd(host, suser, bp, &remin, &remout) < 0) {
1.18 markus 552: (void) xfree(bp);
553: ++errs;
554: continue;
1.1 deraadt 555: }
1.18 markus 556: xfree(bp);
1.1 deraadt 557: sink(1, argv + argc - 1);
1.18 markus 558: (void) close(remin);
1.1 deraadt 559: remin = remout = -1;
560: }
561: }
562:
563: void
1.104 djm 564: source(int argc, char **argv)
1.1 deraadt 565: {
566: struct stat stb;
567: static BUF buffer;
568: BUF *bp;
1.122 avsm 569: off_t i, amt, statbytes;
570: size_t result;
1.125 dtucker 571: int fd = -1, haderr, indx;
1.1 deraadt 572: char *last, *name, buf[2048];
1.65 deraadt 573: int len;
1.1 deraadt 574:
575: for (indx = 0; indx < argc; ++indx) {
1.18 markus 576: name = argv[indx];
1.11 aaron 577: statbytes = 0;
1.65 deraadt 578: len = strlen(name);
579: while (len > 1 && name[len-1] == '/')
580: name[--len] = '\0';
1.85 markus 581: if (strchr(name, '\n') != NULL) {
582: run_err("%s: skipping, filename contains a newline",
583: name);
584: goto next;
585: }
1.1 deraadt 586: if ((fd = open(name, O_RDONLY, 0)) < 0)
587: goto syserr;
588: if (fstat(fd, &stb) < 0) {
589: syserr: run_err("%s: %s", name, strerror(errno));
590: goto next;
591: }
592: switch (stb.st_mode & S_IFMT) {
593: case S_IFREG:
594: break;
595: case S_IFDIR:
596: if (iamrecursive) {
597: rsource(name, &stb);
598: goto next;
599: }
600: /* FALLTHROUGH */
601: default:
602: run_err("%s: not a regular file", name);
603: goto next;
604: }
605: if ((last = strrchr(name, '/')) == NULL)
606: last = name;
607: else
608: ++last;
1.11 aaron 609: curfile = last;
1.1 deraadt 610: if (pflag) {
611: /*
612: * Make it compatible with possible future
613: * versions expecting microseconds.
614: */
1.55 deraadt 615: (void) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n",
1.47 markus 616: (u_long) stb.st_mtime,
617: (u_long) stb.st_atime);
1.107 deraadt 618: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 619: if (response() < 0)
620: goto next;
621: }
622: #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
1.61 markus 623: snprintf(buf, sizeof buf, "C%04o %lld %s\n",
1.47 markus 624: (u_int) (stb.st_mode & FILEMODEMASK),
1.62 markus 625: (long long)stb.st_size, last);
1.18 markus 626: if (verbose_mode) {
627: fprintf(stderr, "Sending file modes: %s", buf);
628: }
1.107 deraadt 629: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 630: if (response() < 0)
631: goto next;
632: if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) {
1.127 deraadt 633: next: if (fd != -1) {
634: (void) close(fd);
635: fd = -1;
636: }
1.1 deraadt 637: continue;
638: }
1.97 fgsch 639: if (showprogress)
640: start_progress_meter(curfile, stb.st_size, &statbytes);
1.1 deraadt 641: /* Keep writing after an error so that we stay sync'd up. */
642: for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
643: amt = bp->cnt;
644: if (i + amt > stb.st_size)
645: amt = stb.st_size - i;
646: if (!haderr) {
1.30 deraadt 647: result = atomicio(read, fd, bp->buf, amt);
1.1 deraadt 648: if (result != amt)
1.122 avsm 649: haderr = errno;
1.1 deraadt 650: }
651: if (haderr)
1.107 deraadt 652: (void) atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 653: else {
1.107 deraadt 654: result = atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 655: if (result != amt)
1.122 avsm 656: haderr = errno;
1.4 aaron 657: statbytes += result;
1.1 deraadt 658: }
1.113 djm 659: if (limit_rate)
1.99 markus 660: bwlimit(amt);
1.1 deraadt 661: }
1.18 markus 662: if (showprogress)
1.97 fgsch 663: stop_progress_meter();
1.4 aaron 664:
1.127 deraadt 665: if (fd != -1) {
666: if (close(fd) < 0 && !haderr)
667: haderr = errno;
668: fd = -1;
669: }
1.1 deraadt 670: if (!haderr)
1.107 deraadt 671: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 672: else
673: run_err("%s: %s", name, strerror(haderr));
1.18 markus 674: (void) response();
1.1 deraadt 675: }
676: }
677:
678: void
1.104 djm 679: rsource(char *name, struct stat *statp)
1.1 deraadt 680: {
681: DIR *dirp;
682: struct dirent *dp;
683: char *last, *vect[1], path[1100];
684:
685: if (!(dirp = opendir(name))) {
686: run_err("%s: %s", name, strerror(errno));
687: return;
688: }
689: last = strrchr(name, '/');
690: if (last == 0)
691: last = name;
692: else
693: last++;
694: if (pflag) {
1.55 deraadt 695: (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n",
1.47 markus 696: (u_long) statp->st_mtime,
697: (u_long) statp->st_atime);
1.107 deraadt 698: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 699: if (response() < 0) {
700: closedir(dirp);
701: return;
702: }
703: }
1.55 deraadt 704: (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n",
1.47 markus 705: (u_int) (statp->st_mode & FILEMODEMASK), 0, last);
1.18 markus 706: if (verbose_mode)
707: fprintf(stderr, "Entering directory: %s", path);
1.107 deraadt 708: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 709: if (response() < 0) {
710: closedir(dirp);
711: return;
712: }
1.63 stevesk 713: while ((dp = readdir(dirp)) != NULL) {
1.1 deraadt 714: if (dp->d_ino == 0)
715: continue;
716: if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
717: continue;
718: if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) {
719: run_err("%s/%s: name too long", name, dp->d_name);
720: continue;
721: }
1.55 deraadt 722: (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name);
1.1 deraadt 723: vect[0] = path;
724: source(1, vect);
725: }
1.18 markus 726: (void) closedir(dirp);
1.107 deraadt 727: (void) atomicio(vwrite, remout, "E\n", 2);
1.18 markus 728: (void) response();
1.1 deraadt 729: }
730:
731: void
1.99 markus 732: bwlimit(int amount)
733: {
734: static struct timeval bwstart, bwend;
735: static int lamt, thresh = 16384;
1.115 avsm 736: u_int64_t waitlen;
1.99 markus 737: struct timespec ts, rm;
738:
739: if (!timerisset(&bwstart)) {
740: gettimeofday(&bwstart, NULL);
741: return;
742: }
743:
744: lamt += amount;
745: if (lamt < thresh)
746: return;
747:
748: gettimeofday(&bwend, NULL);
749: timersub(&bwend, &bwstart, &bwend);
750: if (!timerisset(&bwend))
751: return;
752:
753: lamt *= 8;
1.115 avsm 754: waitlen = (double)1000000L * lamt / limit_rate;
1.99 markus 755:
1.115 avsm 756: bwstart.tv_sec = waitlen / 1000000L;
757: bwstart.tv_usec = waitlen % 1000000L;
1.99 markus 758:
759: if (timercmp(&bwstart, &bwend, >)) {
760: timersub(&bwstart, &bwend, &bwend);
761:
762: /* Adjust the wait time */
763: if (bwend.tv_sec) {
764: thresh /= 2;
765: if (thresh < 2048)
766: thresh = 2048;
767: } else if (bwend.tv_usec < 100) {
768: thresh *= 2;
769: if (thresh > 32768)
770: thresh = 32768;
771: }
772:
773: TIMEVAL_TO_TIMESPEC(&bwend, &ts);
774: while (nanosleep(&ts, &rm) == -1) {
775: if (errno != EINTR)
776: break;
777: ts = rm;
778: }
779: }
780:
781: lamt = 0;
782: gettimeofday(&bwstart, NULL);
783: }
784:
785: void
1.104 djm 786: sink(int argc, char **argv)
1.1 deraadt 787: {
788: static BUF buffer;
789: struct stat stb;
1.18 markus 790: enum {
791: YES, NO, DISPLAYED
792: } wrerr;
1.1 deraadt 793: BUF *bp;
1.122 avsm 794: off_t i;
1.124 djm 795: size_t j, count;
1.140 deraadt 796: int amt, exists, first, ofd;
797: mode_t mode, omode, mask;
1.97 fgsch 798: off_t size, statbytes;
1.36 deraadt 799: int setimes, targisdir, wrerrno = 0;
1.1 deraadt 800: char ch, *cp, *np, *targ, *why, *vect[1], buf[2048];
1.40 markus 801: struct timeval tv[2];
1.1 deraadt 802:
1.66 stevesk 803: #define atime tv[0]
804: #define mtime tv[1]
1.118 deraadt 805: #define SCREWUP(str) { why = str; goto screwup; }
1.1 deraadt 806:
807: setimes = targisdir = 0;
808: mask = umask(0);
809: if (!pflag)
1.18 markus 810: (void) umask(mask);
1.1 deraadt 811: if (argc != 1) {
812: run_err("ambiguous target");
813: exit(1);
814: }
815: targ = *argv;
816: if (targetshouldbedirectory)
817: verifydir(targ);
1.18 markus 818:
1.107 deraadt 819: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 820: if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
821: targisdir = 1;
822: for (first = 1;; first = 0) {
823: cp = buf;
1.122 avsm 824: if (atomicio(read, remin, cp, 1) != 1)
1.1 deraadt 825: return;
826: if (*cp++ == '\n')
827: SCREWUP("unexpected <newline>");
828: do {
1.30 deraadt 829: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 830: SCREWUP("lost connection");
831: *cp++ = ch;
832: } while (cp < &buf[sizeof(buf) - 1] && ch != '\n');
833: *cp = 0;
1.114 markus 834: if (verbose_mode)
835: fprintf(stderr, "Sink: %s", buf);
1.1 deraadt 836:
837: if (buf[0] == '\01' || buf[0] == '\02') {
838: if (iamremote == 0)
1.107 deraadt 839: (void) atomicio(vwrite, STDERR_FILENO,
1.44 deraadt 840: buf + 1, strlen(buf + 1));
1.1 deraadt 841: if (buf[0] == '\02')
842: exit(1);
843: ++errs;
844: continue;
845: }
846: if (buf[0] == 'E') {
1.107 deraadt 847: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 848: return;
849: }
850: if (ch == '\n')
851: *--cp = 0;
852:
853: cp = buf;
854: if (*cp == 'T') {
855: setimes++;
856: cp++;
1.66 stevesk 857: mtime.tv_sec = strtol(cp, &cp, 10);
858: if (!cp || *cp++ != ' ')
1.1 deraadt 859: SCREWUP("mtime.sec not delimited");
1.66 stevesk 860: mtime.tv_usec = strtol(cp, &cp, 10);
861: if (!cp || *cp++ != ' ')
1.1 deraadt 862: SCREWUP("mtime.usec not delimited");
1.66 stevesk 863: atime.tv_sec = strtol(cp, &cp, 10);
864: if (!cp || *cp++ != ' ')
1.1 deraadt 865: SCREWUP("atime.sec not delimited");
1.66 stevesk 866: atime.tv_usec = strtol(cp, &cp, 10);
867: if (!cp || *cp++ != '\0')
1.1 deraadt 868: SCREWUP("atime.usec not delimited");
1.107 deraadt 869: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 870: continue;
871: }
872: if (*cp != 'C' && *cp != 'D') {
873: /*
874: * Check for the case "rcp remote:foo\* local:bar".
875: * In this case, the line "No match." can be returned
876: * by the shell before the rcp command on the remote is
877: * executed so the ^Aerror_message convention isn't
878: * followed.
879: */
880: if (first) {
881: run_err("%s", cp);
882: exit(1);
883: }
884: SCREWUP("expected control record");
885: }
886: mode = 0;
887: for (++cp; cp < buf + 5; cp++) {
888: if (*cp < '0' || *cp > '7')
889: SCREWUP("bad mode");
890: mode = (mode << 3) | (*cp - '0');
891: }
892: if (*cp++ != ' ')
893: SCREWUP("mode not delimited");
894:
1.63 stevesk 895: for (size = 0; isdigit(*cp);)
1.1 deraadt 896: size = size * 10 + (*cp++ - '0');
897: if (*cp++ != ' ')
898: SCREWUP("size not delimited");
1.114 markus 899: if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) {
900: run_err("error: unexpected filename: %s", cp);
901: exit(1);
902: }
1.1 deraadt 903: if (targisdir) {
904: static char *namebuf;
1.124 djm 905: static size_t cursize;
1.1 deraadt 906: size_t need;
907:
908: need = strlen(targ) + strlen(cp) + 250;
1.55 deraadt 909: if (need > cursize) {
1.58 danh 910: if (namebuf)
911: xfree(namebuf);
1.18 markus 912: namebuf = xmalloc(need);
1.55 deraadt 913: cursize = need;
914: }
915: (void) snprintf(namebuf, need, "%s%s%s", targ,
1.88 mouring 916: strcmp(targ, "/") ? "/" : "", cp);
1.1 deraadt 917: np = namebuf;
918: } else
919: np = targ;
1.12 aaron 920: curfile = cp;
1.1 deraadt 921: exists = stat(np, &stb) == 0;
922: if (buf[0] == 'D') {
923: int mod_flag = pflag;
1.114 markus 924: if (!iamrecursive)
925: SCREWUP("received directory without -r");
1.1 deraadt 926: if (exists) {
927: if (!S_ISDIR(stb.st_mode)) {
928: errno = ENOTDIR;
929: goto bad;
930: }
931: if (pflag)
1.18 markus 932: (void) chmod(np, mode);
1.1 deraadt 933: } else {
1.18 markus 934: /* Handle copying from a read-only
935: directory */
1.1 deraadt 936: mod_flag = 1;
937: if (mkdir(np, mode | S_IRWXU) < 0)
938: goto bad;
939: }
1.58 danh 940: vect[0] = xstrdup(np);
1.1 deraadt 941: sink(1, vect);
942: if (setimes) {
943: setimes = 0;
1.59 deraadt 944: if (utimes(vect[0], tv) < 0)
1.18 markus 945: run_err("%s: set times: %s",
1.59 deraadt 946: vect[0], strerror(errno));
1.1 deraadt 947: }
948: if (mod_flag)
1.59 deraadt 949: (void) chmod(vect[0], mode);
950: if (vect[0])
951: xfree(vect[0]);
1.1 deraadt 952: continue;
953: }
954: omode = mode;
955: mode |= S_IWRITE;
1.71 markus 956: if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
1.1 deraadt 957: bad: run_err("%s: %s", np, strerror(errno));
958: continue;
959: }
1.107 deraadt 960: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 961: if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) {
1.18 markus 962: (void) close(ofd);
1.1 deraadt 963: continue;
964: }
965: cp = bp->buf;
966: wrerr = NO;
1.7 deraadt 967:
1.12 aaron 968: statbytes = 0;
1.97 fgsch 969: if (showprogress)
970: start_progress_meter(curfile, size, &statbytes);
1.1 deraadt 971: for (count = i = 0; i < size; i += 4096) {
972: amt = 4096;
973: if (i + amt > size)
974: amt = size - i;
975: count += amt;
976: do {
1.117 avsm 977: j = atomicio(read, remin, cp, amt);
1.122 avsm 978: if (j == 0) {
1.1 deraadt 979: run_err("%s", j ? strerror(errno) :
1.63 stevesk 980: "dropped connection");
1.1 deraadt 981: exit(1);
982: }
983: amt -= j;
984: cp += j;
1.18 markus 985: statbytes += j;
1.1 deraadt 986: } while (amt > 0);
1.112 djm 987:
1.113 djm 988: if (limit_rate)
1.99 markus 989: bwlimit(4096);
990:
1.1 deraadt 991: if (count == bp->cnt) {
992: /* Keep reading so we stay sync'd up. */
993: if (wrerr == NO) {
1.122 avsm 994: if (atomicio(vwrite, ofd, bp->buf,
995: count) != count) {
1.1 deraadt 996: wrerr = YES;
1.122 avsm 997: wrerrno = errno;
1.1 deraadt 998: }
999: }
1000: count = 0;
1001: cp = bp->buf;
1002: }
1003: }
1.7 deraadt 1004: if (showprogress)
1.97 fgsch 1005: stop_progress_meter();
1.1 deraadt 1006: if (count != 0 && wrerr == NO &&
1.122 avsm 1007: atomicio(vwrite, ofd, bp->buf, count) != count) {
1.1 deraadt 1008: wrerr = YES;
1.122 avsm 1009: wrerrno = errno;
1.1 deraadt 1010: }
1.98 djm 1011: if (wrerr == NO && ftruncate(ofd, size) != 0) {
1.1 deraadt 1012: run_err("%s: truncate: %s", np, strerror(errno));
1013: wrerr = DISPLAYED;
1014: }
1015: if (pflag) {
1016: if (exists || omode != mode)
1.116 dtucker 1017: if (fchmod(ofd, omode)) {
1.1 deraadt 1018: run_err("%s: set mode: %s",
1.63 stevesk 1019: np, strerror(errno));
1.116 dtucker 1020: wrerr = DISPLAYED;
1021: }
1.1 deraadt 1022: } else {
1023: if (!exists && omode != mode)
1.116 dtucker 1024: if (fchmod(ofd, omode & ~mask)) {
1.1 deraadt 1025: run_err("%s: set mode: %s",
1.63 stevesk 1026: np, strerror(errno));
1.116 dtucker 1027: wrerr = DISPLAYED;
1028: }
1.1 deraadt 1029: }
1.33 provos 1030: if (close(ofd) == -1) {
1031: wrerr = YES;
1032: wrerrno = errno;
1033: }
1.18 markus 1034: (void) response();
1.1 deraadt 1035: if (setimes && wrerr == NO) {
1036: setimes = 0;
1.40 markus 1037: if (utimes(np, tv) < 0) {
1.1 deraadt 1038: run_err("%s: set times: %s",
1.63 stevesk 1039: np, strerror(errno));
1.1 deraadt 1040: wrerr = DISPLAYED;
1041: }
1042: }
1.18 markus 1043: switch (wrerr) {
1.1 deraadt 1044: case YES:
1045: run_err("%s: %s", np, strerror(wrerrno));
1046: break;
1047: case NO:
1.107 deraadt 1048: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 1049: break;
1050: case DISPLAYED:
1051: break;
1052: }
1053: }
1054: screwup:
1055: run_err("protocol error: %s", why);
1056: exit(1);
1057: }
1058:
1059: int
1.86 itojun 1060: response(void)
1.1 deraadt 1061: {
1062: char ch, *cp, resp, rbuf[2048];
1063:
1.30 deraadt 1064: if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp))
1.1 deraadt 1065: lostconn(0);
1066:
1067: cp = rbuf;
1.18 markus 1068: switch (resp) {
1069: case 0: /* ok */
1.1 deraadt 1070: return (0);
1071: default:
1072: *cp++ = resp;
1073: /* FALLTHROUGH */
1.18 markus 1074: case 1: /* error, followed by error msg */
1075: case 2: /* fatal error, "" */
1.1 deraadt 1076: do {
1.30 deraadt 1077: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 1078: lostconn(0);
1079: *cp++ = ch;
1080: } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
1081:
1082: if (!iamremote)
1.107 deraadt 1083: (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf);
1.1 deraadt 1084: ++errs;
1085: if (resp == 1)
1086: return (-1);
1087: exit(1);
1088: }
1089: /* NOTREACHED */
1090: }
1091:
1092: void
1.86 itojun 1093: usage(void)
1.1 deraadt 1094: {
1.83 stevesk 1095: (void) fprintf(stderr,
1.110 jmc 1096: "usage: scp [-1246BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n"
1097: " [-l limit] [-o ssh_option] [-P port] [-S program]\n"
1.90 deraadt 1098: " [[user@]host1:]file1 [...] [[user@]host2:]file2\n");
1.1 deraadt 1099: exit(1);
1100: }
1101:
1102: void
1.18 markus 1103: run_err(const char *fmt,...)
1.1 deraadt 1104: {
1105: static FILE *fp;
1106: va_list ap;
1107:
1108: ++errs;
1.136 biorn 1109: if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) {
1110: (void) fprintf(fp, "%c", 0x01);
1111: (void) fprintf(fp, "scp: ");
1112: va_start(ap, fmt);
1113: (void) vfprintf(fp, fmt, ap);
1114: va_end(ap);
1115: (void) fprintf(fp, "\n");
1116: (void) fflush(fp);
1117: }
1.18 markus 1118:
1119: if (!iamremote) {
1.73 markus 1120: va_start(ap, fmt);
1.18 markus 1121: vfprintf(stderr, fmt, ap);
1.73 markus 1122: va_end(ap);
1.18 markus 1123: fprintf(stderr, "\n");
1124: }
1.1 deraadt 1125: }
1126:
1127: void
1.104 djm 1128: verifydir(char *cp)
1.1 deraadt 1129: {
1130: struct stat stb;
1131:
1132: if (!stat(cp, &stb)) {
1133: if (S_ISDIR(stb.st_mode))
1134: return;
1135: errno = ENOTDIR;
1136: }
1137: run_err("%s: %s", cp, strerror(errno));
1.123 avsm 1138: killchild(0);
1.1 deraadt 1139: }
1140:
1141: int
1.104 djm 1142: okname(char *cp0)
1.1 deraadt 1143: {
1144: int c;
1145: char *cp;
1146:
1147: cp = cp0;
1148: do {
1.75 deraadt 1149: c = (int)*cp;
1.1 deraadt 1150: if (c & 0200)
1151: goto bad;
1.101 markus 1152: if (!isalpha(c) && !isdigit(c)) {
1153: switch (c) {
1154: case '\'':
1155: case '"':
1156: case '`':
1157: case ' ':
1158: case '#':
1159: goto bad;
1160: default:
1161: break;
1162: }
1163: }
1.1 deraadt 1164: } while (*++cp);
1165: return (1);
1166:
1.25 markus 1167: bad: fprintf(stderr, "%s: invalid user name\n", cp0);
1.1 deraadt 1168: return (0);
1169: }
1170:
1171: BUF *
1.104 djm 1172: allocbuf(BUF *bp, int fd, int blksize)
1.1 deraadt 1173: {
1174: size_t size;
1175: struct stat stb;
1176:
1177: if (fstat(fd, &stb) < 0) {
1178: run_err("fstat: %s", strerror(errno));
1179: return (0);
1180: }
1.95 markus 1181: size = roundup(stb.st_blksize, blksize);
1182: if (size == 0)
1.18 markus 1183: size = blksize;
1.1 deraadt 1184: if (bp->cnt >= size)
1185: return (bp);
1.18 markus 1186: if (bp->buf == NULL)
1187: bp->buf = xmalloc(size);
1188: else
1.138 djm 1189: bp->buf = xrealloc(bp->buf, 1, size);
1.81 markus 1190: memset(bp->buf, 0, size);
1.1 deraadt 1191: bp->cnt = size;
1192: return (bp);
1193: }
1194:
1195: void
1.104 djm 1196: lostconn(int signo)
1.1 deraadt 1197: {
1198: if (!iamremote)
1.74 markus 1199: write(STDERR_FILENO, "lost connection\n", 16);
1200: if (signo)
1201: _exit(1);
1202: else
1203: exit(1);
1.4 aaron 1204: }