Annotation of src/usr.bin/ssh/scp.c, Revision 1.146
1.146 ! stevesk 1: /* $OpenBSD: scp.c,v 1.145 2006/07/10 12:03:20 djm 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>
1.144 stevesk 82: #include <fcntl.h>
1.143 stevesk 83: #include <pwd.h>
1.133 stevesk 84: #include <signal.h>
1.146 ! stevesk 85: #include <stdarg.h>
1.1 deraadt 86:
87: #include "xmalloc.h"
1.51 markus 88: #include "atomicio.h"
1.50 markus 89: #include "pathnames.h"
1.51 markus 90: #include "log.h"
1.69 mouring 91: #include "misc.h"
1.97 fgsch 92: #include "progressmeter.h"
1.1 deraadt 93:
1.140 deraadt 94: int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout);
1.11 aaron 95:
1.99 markus 96: void bwlimit(int);
97:
1.70 mouring 98: /* Struct for addargs */
99: arglist args;
1.41 markus 100:
1.99 markus 101: /* Bandwidth limit */
1.113 djm 102: off_t limit_rate = 0;
1.99 markus 103:
1.11 aaron 104: /* Name of current file being transferred. */
105: char *curfile;
1.4 aaron 106:
1.1 deraadt 107: /* This is set to non-zero to enable verbose mode. */
1.17 markus 108: int verbose_mode = 0;
1.1 deraadt 109:
1.6 aaron 110: /* This is set to zero if the progressmeter is not desired. */
111: int showprogress = 1;
112:
1.34 deraadt 113: /* This is the program to execute for the secured connection. ("ssh" or -S) */
1.50 markus 114: char *ssh_program = _PATH_SSH_PROGRAM;
1.34 deraadt 115:
1.92 markus 116: /* This is used to store the pid of ssh_program */
1.105 djm 117: pid_t do_cmd_pid = -1;
118:
119: static void
120: killchild(int signo)
121: {
1.119 dtucker 122: if (do_cmd_pid > 1) {
1.123 avsm 123: kill(do_cmd_pid, signo ? signo : SIGTERM);
1.119 dtucker 124: waitpid(do_cmd_pid, NULL, 0);
125: }
1.105 djm 126:
1.123 avsm 127: if (signo)
128: _exit(1);
129: exit(1);
1.105 djm 130: }
1.92 markus 131:
1.129 djm 132: static int
133: do_local_cmd(arglist *a)
134: {
135: u_int i;
136: int status;
137: pid_t pid;
138:
139: if (a->num == 0)
140: fatal("do_local_cmd: no arguments");
141:
142: if (verbose_mode) {
143: fprintf(stderr, "Executing:");
144: for (i = 0; i < a->num; i++)
145: fprintf(stderr, " %s", a->list[i]);
146: fprintf(stderr, "\n");
147: }
148: if ((pid = fork()) == -1)
149: fatal("do_local_cmd: fork: %s", strerror(errno));
150:
151: if (pid == 0) {
152: execvp(a->list[0], a->list);
153: perror(a->list[0]);
154: exit(1);
155: }
156:
157: do_cmd_pid = pid;
158: signal(SIGTERM, killchild);
159: signal(SIGINT, killchild);
160: signal(SIGHUP, killchild);
161:
162: while (waitpid(pid, &status, 0) == -1)
163: if (errno != EINTR)
164: fatal("do_local_cmd: waitpid: %s", strerror(errno));
165:
166: do_cmd_pid = -1;
167:
168: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
169: return (-1);
170:
171: return (0);
172: }
173:
1.20 markus 174: /*
175: * This function executes the given command as the specified user on the
176: * given host. This returns < 0 if execution fails, and >= 0 otherwise. This
177: * assigns the input and output file descriptors on success.
178: */
1.1 deraadt 179:
1.27 markus 180: int
1.140 deraadt 181: do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout)
1.1 deraadt 182: {
1.18 markus 183: int pin[2], pout[2], reserved[2];
184:
185: if (verbose_mode)
1.78 deraadt 186: fprintf(stderr,
187: "Executing: program %s host %s, user %s, command %s\n",
188: ssh_program, host,
189: remuser ? remuser : "(unspecified)", cmd);
1.18 markus 190:
1.20 markus 191: /*
192: * Reserve two descriptors so that the real pipes won't get
193: * descriptors 0 and 1 because that will screw up dup2 below.
194: */
1.142 markus 195: if (pipe(reserved) < 0)
196: fatal("pipe: %s", strerror(errno));
1.18 markus 197:
198: /* Create a socket pair for communicating with ssh. */
199: if (pipe(pin) < 0)
200: fatal("pipe: %s", strerror(errno));
201: if (pipe(pout) < 0)
202: fatal("pipe: %s", strerror(errno));
203:
204: /* Free the reserved descriptors. */
205: close(reserved[0]);
206: close(reserved[1]);
207:
1.106 nino 208: /* Fork a child to execute the command on the remote host using ssh. */
1.92 markus 209: do_cmd_pid = fork();
210: if (do_cmd_pid == 0) {
1.18 markus 211: /* Child. */
212: close(pin[1]);
213: close(pout[0]);
214: dup2(pin[0], 0);
215: dup2(pout[1], 1);
216: close(pin[0]);
217: close(pout[1]);
218:
1.129 djm 219: replacearg(&args, 0, "%s", ssh_program);
1.41 markus 220: if (remuser != NULL)
1.70 mouring 221: addargs(&args, "-l%s", remuser);
222: addargs(&args, "%s", host);
223: addargs(&args, "%s", cmd);
1.18 markus 224:
1.41 markus 225: execvp(ssh_program, args.list);
1.34 deraadt 226: perror(ssh_program);
1.18 markus 227: exit(1);
1.92 markus 228: } else if (do_cmd_pid == -1) {
229: fatal("fork: %s", strerror(errno));
1.18 markus 230: }
231: /* Parent. Close the other side, and return the local side. */
232: close(pin[0]);
233: *fdout = pin[1];
234: close(pout[1]);
235: *fdin = pout[0];
1.105 djm 236: signal(SIGTERM, killchild);
237: signal(SIGINT, killchild);
238: signal(SIGHUP, killchild);
1.18 markus 239: return 0;
1.1 deraadt 240: }
241:
242: typedef struct {
1.124 djm 243: size_t cnt;
1.1 deraadt 244: char *buf;
245: } BUF;
246:
1.18 markus 247: BUF *allocbuf(BUF *, int, int);
248: void lostconn(int);
249: int okname(char *);
250: void run_err(const char *,...);
251: void verifydir(char *);
1.1 deraadt 252:
253: struct passwd *pwd;
1.18 markus 254: uid_t userid;
1.1 deraadt 255: int errs, remin, remout;
256: int pflag, iamremote, iamrecursive, targetshouldbedirectory;
257:
258: #define CMDNEEDS 64
259: char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
260:
1.18 markus 261: int response(void);
262: void rsource(char *, struct stat *);
263: void sink(int, char *[]);
264: void source(int, char *[]);
265: void tolocal(int, char *[]);
266: void toremote(char *, int, char *[]);
267: void usage(void);
1.1 deraadt 268:
269: int
1.104 djm 270: main(int argc, char **argv)
1.1 deraadt 271: {
1.145 djm 272: int ch, fflag, tflag, status, n;
1.99 markus 273: double speed;
1.145 djm 274: char *targ, *endp, **newargv;
1.1 deraadt 275: extern char *optarg;
276: extern int optind;
1.126 djm 277:
278: /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
279: sanitise_stdfd();
1.145 djm 280:
281: /* Copy argv, because we modify it */
282: newargv = xcalloc(MAX(argc + 1, 1), sizeof(*newargv));
283: for (n = 0; n < argc; n++)
284: newargv[n] = xstrdup(argv[n]);
285: argv = newargv;
1.1 deraadt 286:
1.129 djm 287: memset(&args, '\0', sizeof(args));
1.41 markus 288: args.list = NULL;
1.129 djm 289: addargs(&args, "%s", ssh_program);
1.70 mouring 290: addargs(&args, "-x");
1.82 stevesk 291: addargs(&args, "-oForwardAgent no");
1.128 reyk 292: addargs(&args, "-oPermitLocalCommand no");
1.84 stevesk 293: addargs(&args, "-oClearAllForwardings yes");
1.41 markus 294:
1.1 deraadt 295: fflag = tflag = 0;
1.100 markus 296: while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q1246S:o:F:")) != -1)
1.18 markus 297: switch (ch) {
298: /* User-visible flags. */
1.100 markus 299: case '1':
300: case '2':
1.23 markus 301: case '4':
1.41 markus 302: case '6':
303: case 'C':
1.70 mouring 304: addargs(&args, "-%c", ch);
1.41 markus 305: break;
306: case 'o':
307: case 'c':
308: case 'i':
1.83 stevesk 309: case 'F':
1.70 mouring 310: addargs(&args, "-%c%s", ch, optarg);
1.23 markus 311: break;
1.41 markus 312: case 'P':
1.70 mouring 313: addargs(&args, "-p%s", optarg);
1.41 markus 314: break;
315: case 'B':
1.70 mouring 316: addargs(&args, "-oBatchmode yes");
1.23 markus 317: break;
1.99 markus 318: case 'l':
319: speed = strtod(optarg, &endp);
320: if (speed <= 0 || *endp != '\0')
321: usage();
1.113 djm 322: limit_rate = speed * 1024;
1.99 markus 323: break;
1.1 deraadt 324: case 'p':
325: pflag = 1;
326: break;
327: case 'r':
328: iamrecursive = 1;
329: break;
1.34 deraadt 330: case 'S':
1.41 markus 331: ssh_program = xstrdup(optarg);
332: break;
333: case 'v':
1.72 markus 334: addargs(&args, "-v");
1.41 markus 335: verbose_mode = 1;
336: break;
337: case 'q':
1.111 dtucker 338: addargs(&args, "-q");
1.41 markus 339: showprogress = 0;
1.34 deraadt 340: break;
341:
1.18 markus 342: /* Server options. */
1.1 deraadt 343: case 'd':
344: targetshouldbedirectory = 1;
345: break;
1.18 markus 346: case 'f': /* "from" */
1.1 deraadt 347: iamremote = 1;
348: fflag = 1;
349: break;
1.18 markus 350: case 't': /* "to" */
1.1 deraadt 351: iamremote = 1;
352: tflag = 1;
353: break;
354: default:
355: usage();
356: }
357: argc -= optind;
358: argv += optind;
359:
360: if ((pwd = getpwuid(userid = getuid())) == NULL)
1.108 deraadt 361: fatal("unknown user %u", (u_int) userid);
1.1 deraadt 362:
1.18 markus 363: if (!isatty(STDERR_FILENO))
1.7 deraadt 364: showprogress = 0;
365:
1.1 deraadt 366: remin = STDIN_FILENO;
367: remout = STDOUT_FILENO;
368:
1.52 stevesk 369: if (fflag) {
1.18 markus 370: /* Follow "protocol", send data. */
371: (void) response();
1.1 deraadt 372: source(argc, argv);
373: exit(errs != 0);
374: }
1.18 markus 375: if (tflag) {
376: /* Receive data. */
1.1 deraadt 377: sink(argc, argv);
378: exit(errs != 0);
379: }
380: if (argc < 2)
381: usage();
382: if (argc > 2)
383: targetshouldbedirectory = 1;
384:
385: remin = remout = -1;
1.92 markus 386: do_cmd_pid = -1;
1.1 deraadt 387: /* Command to be executed on remote system using "ssh". */
1.55 deraadt 388: (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
389: verbose_mode ? " -v" : "",
1.35 deraadt 390: iamrecursive ? " -r" : "", pflag ? " -p" : "",
391: targetshouldbedirectory ? " -d" : "");
1.1 deraadt 392:
1.18 markus 393: (void) signal(SIGPIPE, lostconn);
1.1 deraadt 394:
395: if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */
396: toremote(targ, argc, argv);
397: else {
398: if (targetshouldbedirectory)
399: verifydir(argv[argc - 1]);
1.130 djm 400: tolocal(argc, argv); /* Dest is local host. */
1.92 markus 401: }
402: /*
403: * Finally check the exit status of the ssh process, if one was forked
404: * and no error has occured yet
405: */
406: if (do_cmd_pid != -1 && errs == 0) {
407: if (remin != -1)
408: (void) close(remin);
409: if (remout != -1)
410: (void) close(remout);
411: if (waitpid(do_cmd_pid, &status, 0) == -1)
412: errs = 1;
413: else {
414: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
415: errs = 1;
416: }
1.1 deraadt 417: }
418: exit(errs != 0);
419: }
420:
421: void
1.104 djm 422: toremote(char *targ, int argc, char **argv)
1.1 deraadt 423: {
1.120 deraadt 424: char *bp, *host, *src, *suser, *thost, *tuser, *arg;
1.129 djm 425: arglist alist;
1.140 deraadt 426: int i;
1.129 djm 427:
428: memset(&alist, '\0', sizeof(alist));
429: alist.list = NULL;
1.1 deraadt 430:
431: *targ++ = 0;
432: if (*targ == 0)
433: targ = ".";
434:
1.121 djm 435: arg = xstrdup(argv[argc - 1]);
1.120 deraadt 436: if ((thost = strrchr(arg, '@'))) {
1.1 deraadt 437: /* user@host */
438: *thost++ = 0;
1.120 deraadt 439: tuser = arg;
1.1 deraadt 440: if (*tuser == '\0')
441: tuser = NULL;
442: } else {
1.120 deraadt 443: thost = arg;
1.1 deraadt 444: tuser = NULL;
445: }
446:
1.129 djm 447: if (tuser != NULL && !okname(tuser)) {
448: xfree(arg);
449: return;
450: }
451:
1.1 deraadt 452: for (i = 0; i < argc - 1; i++) {
453: src = colon(argv[i]);
1.18 markus 454: if (src) { /* remote to remote */
1.129 djm 455: freeargs(&alist);
456: addargs(&alist, "%s", ssh_program);
457: if (verbose_mode)
458: addargs(&alist, "-v");
459: addargs(&alist, "-x");
460: addargs(&alist, "-oClearAllForwardings yes");
461: addargs(&alist, "-n");
462:
1.1 deraadt 463: *src++ = 0;
464: if (*src == 0)
465: src = ".";
1.94 markus 466: host = strrchr(argv[i], '@');
1.129 djm 467:
1.1 deraadt 468: if (host) {
469: *host++ = 0;
1.23 markus 470: host = cleanhostname(host);
1.1 deraadt 471: suser = argv[i];
472: if (*suser == '\0')
473: suser = pwd->pw_name;
1.129 djm 474: else if (!okname(suser))
1.101 markus 475: continue;
1.129 djm 476: addargs(&alist, "-l");
477: addargs(&alist, "%s", suser);
1.23 markus 478: } else {
479: host = cleanhostname(argv[i]);
480: }
1.129 djm 481: addargs(&alist, "%s", host);
482: addargs(&alist, "%s", cmd);
483: addargs(&alist, "%s", src);
484: addargs(&alist, "%s%s%s:%s",
485: tuser ? tuser : "", tuser ? "@" : "",
486: thost, targ);
487: if (do_local_cmd(&alist) != 0)
1.109 markus 488: errs = 1;
1.18 markus 489: } else { /* local to remote */
1.1 deraadt 490: if (remin == -1) {
1.141 djm 491: xasprintf(&bp, "%s -t %s", cmd, targ);
1.23 markus 492: host = cleanhostname(thost);
1.35 deraadt 493: if (do_cmd(host, tuser, bp, &remin,
1.140 deraadt 494: &remout) < 0)
1.18 markus 495: exit(1);
1.1 deraadt 496: if (response() < 0)
497: exit(1);
1.18 markus 498: (void) xfree(bp);
1.1 deraadt 499: }
1.18 markus 500: source(1, argv + i);
1.1 deraadt 501: }
502: }
1.142 markus 503: xfree(arg);
1.1 deraadt 504: }
505:
506: void
1.104 djm 507: tolocal(int argc, char **argv)
1.1 deraadt 508: {
509: char *bp, *host, *src, *suser;
1.129 djm 510: arglist alist;
1.140 deraadt 511: int i;
1.129 djm 512:
513: memset(&alist, '\0', sizeof(alist));
514: alist.list = NULL;
1.1 deraadt 515:
516: for (i = 0; i < argc - 1; i++) {
1.18 markus 517: if (!(src = colon(argv[i]))) { /* Local to local. */
1.129 djm 518: freeargs(&alist);
519: addargs(&alist, "%s", _PATH_CP);
520: if (iamrecursive)
521: addargs(&alist, "-r");
522: if (pflag)
523: addargs(&alist, "-p");
524: addargs(&alist, "%s", argv[i]);
525: addargs(&alist, "%s", argv[argc-1]);
526: if (do_local_cmd(&alist))
1.1 deraadt 527: ++errs;
528: continue;
529: }
530: *src++ = 0;
531: if (*src == 0)
532: src = ".";
1.94 markus 533: if ((host = strrchr(argv[i], '@')) == NULL) {
1.1 deraadt 534: host = argv[i];
535: suser = NULL;
536: } else {
537: *host++ = 0;
538: suser = argv[i];
539: if (*suser == '\0')
540: suser = pwd->pw_name;
541: }
1.23 markus 542: host = cleanhostname(host);
1.141 djm 543: xasprintf(&bp, "%s -f %s", cmd, src);
1.140 deraadt 544: if (do_cmd(host, suser, bp, &remin, &remout) < 0) {
1.18 markus 545: (void) xfree(bp);
546: ++errs;
547: continue;
1.1 deraadt 548: }
1.18 markus 549: xfree(bp);
1.1 deraadt 550: sink(1, argv + argc - 1);
1.18 markus 551: (void) close(remin);
1.1 deraadt 552: remin = remout = -1;
553: }
554: }
555:
556: void
1.104 djm 557: source(int argc, char **argv)
1.1 deraadt 558: {
559: struct stat stb;
560: static BUF buffer;
561: BUF *bp;
1.122 avsm 562: off_t i, amt, statbytes;
563: size_t result;
1.125 dtucker 564: int fd = -1, haderr, indx;
1.1 deraadt 565: char *last, *name, buf[2048];
1.65 deraadt 566: int len;
1.1 deraadt 567:
568: for (indx = 0; indx < argc; ++indx) {
1.18 markus 569: name = argv[indx];
1.11 aaron 570: statbytes = 0;
1.65 deraadt 571: len = strlen(name);
572: while (len > 1 && name[len-1] == '/')
573: name[--len] = '\0';
1.85 markus 574: if (strchr(name, '\n') != NULL) {
575: run_err("%s: skipping, filename contains a newline",
576: name);
577: goto next;
578: }
1.1 deraadt 579: if ((fd = open(name, O_RDONLY, 0)) < 0)
580: goto syserr;
581: if (fstat(fd, &stb) < 0) {
582: syserr: run_err("%s: %s", name, strerror(errno));
583: goto next;
584: }
585: switch (stb.st_mode & S_IFMT) {
586: case S_IFREG:
587: break;
588: case S_IFDIR:
589: if (iamrecursive) {
590: rsource(name, &stb);
591: goto next;
592: }
593: /* FALLTHROUGH */
594: default:
595: run_err("%s: not a regular file", name);
596: goto next;
597: }
598: if ((last = strrchr(name, '/')) == NULL)
599: last = name;
600: else
601: ++last;
1.11 aaron 602: curfile = last;
1.1 deraadt 603: if (pflag) {
604: /*
605: * Make it compatible with possible future
606: * versions expecting microseconds.
607: */
1.55 deraadt 608: (void) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n",
1.47 markus 609: (u_long) stb.st_mtime,
610: (u_long) stb.st_atime);
1.107 deraadt 611: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 612: if (response() < 0)
613: goto next;
614: }
615: #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
1.61 markus 616: snprintf(buf, sizeof buf, "C%04o %lld %s\n",
1.47 markus 617: (u_int) (stb.st_mode & FILEMODEMASK),
1.62 markus 618: (long long)stb.st_size, last);
1.18 markus 619: if (verbose_mode) {
620: fprintf(stderr, "Sending file modes: %s", buf);
621: }
1.107 deraadt 622: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 623: if (response() < 0)
624: goto next;
625: if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) {
1.127 deraadt 626: next: if (fd != -1) {
627: (void) close(fd);
628: fd = -1;
629: }
1.1 deraadt 630: continue;
631: }
1.97 fgsch 632: if (showprogress)
633: start_progress_meter(curfile, stb.st_size, &statbytes);
1.1 deraadt 634: /* Keep writing after an error so that we stay sync'd up. */
635: for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
636: amt = bp->cnt;
637: if (i + amt > stb.st_size)
638: amt = stb.st_size - i;
639: if (!haderr) {
1.30 deraadt 640: result = atomicio(read, fd, bp->buf, amt);
1.1 deraadt 641: if (result != amt)
1.122 avsm 642: haderr = errno;
1.1 deraadt 643: }
644: if (haderr)
1.107 deraadt 645: (void) atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 646: else {
1.107 deraadt 647: result = atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 648: if (result != amt)
1.122 avsm 649: haderr = errno;
1.4 aaron 650: statbytes += result;
1.1 deraadt 651: }
1.113 djm 652: if (limit_rate)
1.99 markus 653: bwlimit(amt);
1.1 deraadt 654: }
1.18 markus 655: if (showprogress)
1.97 fgsch 656: stop_progress_meter();
1.4 aaron 657:
1.127 deraadt 658: if (fd != -1) {
659: if (close(fd) < 0 && !haderr)
660: haderr = errno;
661: fd = -1;
662: }
1.1 deraadt 663: if (!haderr)
1.107 deraadt 664: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 665: else
666: run_err("%s: %s", name, strerror(haderr));
1.18 markus 667: (void) response();
1.1 deraadt 668: }
669: }
670:
671: void
1.104 djm 672: rsource(char *name, struct stat *statp)
1.1 deraadt 673: {
674: DIR *dirp;
675: struct dirent *dp;
676: char *last, *vect[1], path[1100];
677:
678: if (!(dirp = opendir(name))) {
679: run_err("%s: %s", name, strerror(errno));
680: return;
681: }
682: last = strrchr(name, '/');
683: if (last == 0)
684: last = name;
685: else
686: last++;
687: if (pflag) {
1.55 deraadt 688: (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n",
1.47 markus 689: (u_long) statp->st_mtime,
690: (u_long) statp->st_atime);
1.107 deraadt 691: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 692: if (response() < 0) {
693: closedir(dirp);
694: return;
695: }
696: }
1.55 deraadt 697: (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n",
1.47 markus 698: (u_int) (statp->st_mode & FILEMODEMASK), 0, last);
1.18 markus 699: if (verbose_mode)
700: fprintf(stderr, "Entering directory: %s", path);
1.107 deraadt 701: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 702: if (response() < 0) {
703: closedir(dirp);
704: return;
705: }
1.63 stevesk 706: while ((dp = readdir(dirp)) != NULL) {
1.1 deraadt 707: if (dp->d_ino == 0)
708: continue;
709: if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
710: continue;
711: if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) {
712: run_err("%s/%s: name too long", name, dp->d_name);
713: continue;
714: }
1.55 deraadt 715: (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name);
1.1 deraadt 716: vect[0] = path;
717: source(1, vect);
718: }
1.18 markus 719: (void) closedir(dirp);
1.107 deraadt 720: (void) atomicio(vwrite, remout, "E\n", 2);
1.18 markus 721: (void) response();
1.1 deraadt 722: }
723:
724: void
1.99 markus 725: bwlimit(int amount)
726: {
727: static struct timeval bwstart, bwend;
728: static int lamt, thresh = 16384;
1.115 avsm 729: u_int64_t waitlen;
1.99 markus 730: struct timespec ts, rm;
731:
732: if (!timerisset(&bwstart)) {
733: gettimeofday(&bwstart, NULL);
734: return;
735: }
736:
737: lamt += amount;
738: if (lamt < thresh)
739: return;
740:
741: gettimeofday(&bwend, NULL);
742: timersub(&bwend, &bwstart, &bwend);
743: if (!timerisset(&bwend))
744: return;
745:
746: lamt *= 8;
1.115 avsm 747: waitlen = (double)1000000L * lamt / limit_rate;
1.99 markus 748:
1.115 avsm 749: bwstart.tv_sec = waitlen / 1000000L;
750: bwstart.tv_usec = waitlen % 1000000L;
1.99 markus 751:
752: if (timercmp(&bwstart, &bwend, >)) {
753: timersub(&bwstart, &bwend, &bwend);
754:
755: /* Adjust the wait time */
756: if (bwend.tv_sec) {
757: thresh /= 2;
758: if (thresh < 2048)
759: thresh = 2048;
760: } else if (bwend.tv_usec < 100) {
761: thresh *= 2;
762: if (thresh > 32768)
763: thresh = 32768;
764: }
765:
766: TIMEVAL_TO_TIMESPEC(&bwend, &ts);
767: while (nanosleep(&ts, &rm) == -1) {
768: if (errno != EINTR)
769: break;
770: ts = rm;
771: }
772: }
773:
774: lamt = 0;
775: gettimeofday(&bwstart, NULL);
776: }
777:
778: void
1.104 djm 779: sink(int argc, char **argv)
1.1 deraadt 780: {
781: static BUF buffer;
782: struct stat stb;
1.18 markus 783: enum {
784: YES, NO, DISPLAYED
785: } wrerr;
1.1 deraadt 786: BUF *bp;
1.122 avsm 787: off_t i;
1.124 djm 788: size_t j, count;
1.140 deraadt 789: int amt, exists, first, ofd;
790: mode_t mode, omode, mask;
1.97 fgsch 791: off_t size, statbytes;
1.36 deraadt 792: int setimes, targisdir, wrerrno = 0;
1.1 deraadt 793: char ch, *cp, *np, *targ, *why, *vect[1], buf[2048];
1.40 markus 794: struct timeval tv[2];
1.1 deraadt 795:
1.66 stevesk 796: #define atime tv[0]
797: #define mtime tv[1]
1.118 deraadt 798: #define SCREWUP(str) { why = str; goto screwup; }
1.1 deraadt 799:
800: setimes = targisdir = 0;
801: mask = umask(0);
802: if (!pflag)
1.18 markus 803: (void) umask(mask);
1.1 deraadt 804: if (argc != 1) {
805: run_err("ambiguous target");
806: exit(1);
807: }
808: targ = *argv;
809: if (targetshouldbedirectory)
810: verifydir(targ);
1.18 markus 811:
1.107 deraadt 812: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 813: if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
814: targisdir = 1;
815: for (first = 1;; first = 0) {
816: cp = buf;
1.122 avsm 817: if (atomicio(read, remin, cp, 1) != 1)
1.1 deraadt 818: return;
819: if (*cp++ == '\n')
820: SCREWUP("unexpected <newline>");
821: do {
1.30 deraadt 822: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 823: SCREWUP("lost connection");
824: *cp++ = ch;
825: } while (cp < &buf[sizeof(buf) - 1] && ch != '\n');
826: *cp = 0;
1.114 markus 827: if (verbose_mode)
828: fprintf(stderr, "Sink: %s", buf);
1.1 deraadt 829:
830: if (buf[0] == '\01' || buf[0] == '\02') {
831: if (iamremote == 0)
1.107 deraadt 832: (void) atomicio(vwrite, STDERR_FILENO,
1.44 deraadt 833: buf + 1, strlen(buf + 1));
1.1 deraadt 834: if (buf[0] == '\02')
835: exit(1);
836: ++errs;
837: continue;
838: }
839: if (buf[0] == 'E') {
1.107 deraadt 840: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 841: return;
842: }
843: if (ch == '\n')
844: *--cp = 0;
845:
846: cp = buf;
847: if (*cp == 'T') {
848: setimes++;
849: cp++;
1.66 stevesk 850: mtime.tv_sec = strtol(cp, &cp, 10);
851: if (!cp || *cp++ != ' ')
1.1 deraadt 852: SCREWUP("mtime.sec not delimited");
1.66 stevesk 853: mtime.tv_usec = strtol(cp, &cp, 10);
854: if (!cp || *cp++ != ' ')
1.1 deraadt 855: SCREWUP("mtime.usec not delimited");
1.66 stevesk 856: atime.tv_sec = strtol(cp, &cp, 10);
857: if (!cp || *cp++ != ' ')
1.1 deraadt 858: SCREWUP("atime.sec not delimited");
1.66 stevesk 859: atime.tv_usec = strtol(cp, &cp, 10);
860: if (!cp || *cp++ != '\0')
1.1 deraadt 861: SCREWUP("atime.usec not delimited");
1.107 deraadt 862: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 863: continue;
864: }
865: if (*cp != 'C' && *cp != 'D') {
866: /*
867: * Check for the case "rcp remote:foo\* local:bar".
868: * In this case, the line "No match." can be returned
869: * by the shell before the rcp command on the remote is
870: * executed so the ^Aerror_message convention isn't
871: * followed.
872: */
873: if (first) {
874: run_err("%s", cp);
875: exit(1);
876: }
877: SCREWUP("expected control record");
878: }
879: mode = 0;
880: for (++cp; cp < buf + 5; cp++) {
881: if (*cp < '0' || *cp > '7')
882: SCREWUP("bad mode");
883: mode = (mode << 3) | (*cp - '0');
884: }
885: if (*cp++ != ' ')
886: SCREWUP("mode not delimited");
887:
1.63 stevesk 888: for (size = 0; isdigit(*cp);)
1.1 deraadt 889: size = size * 10 + (*cp++ - '0');
890: if (*cp++ != ' ')
891: SCREWUP("size not delimited");
1.114 markus 892: if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) {
893: run_err("error: unexpected filename: %s", cp);
894: exit(1);
895: }
1.1 deraadt 896: if (targisdir) {
897: static char *namebuf;
1.124 djm 898: static size_t cursize;
1.1 deraadt 899: size_t need;
900:
901: need = strlen(targ) + strlen(cp) + 250;
1.55 deraadt 902: if (need > cursize) {
1.58 danh 903: if (namebuf)
904: xfree(namebuf);
1.18 markus 905: namebuf = xmalloc(need);
1.55 deraadt 906: cursize = need;
907: }
908: (void) snprintf(namebuf, need, "%s%s%s", targ,
1.88 mouring 909: strcmp(targ, "/") ? "/" : "", cp);
1.1 deraadt 910: np = namebuf;
911: } else
912: np = targ;
1.12 aaron 913: curfile = cp;
1.1 deraadt 914: exists = stat(np, &stb) == 0;
915: if (buf[0] == 'D') {
916: int mod_flag = pflag;
1.114 markus 917: if (!iamrecursive)
918: SCREWUP("received directory without -r");
1.1 deraadt 919: if (exists) {
920: if (!S_ISDIR(stb.st_mode)) {
921: errno = ENOTDIR;
922: goto bad;
923: }
924: if (pflag)
1.18 markus 925: (void) chmod(np, mode);
1.1 deraadt 926: } else {
1.18 markus 927: /* Handle copying from a read-only
928: directory */
1.1 deraadt 929: mod_flag = 1;
930: if (mkdir(np, mode | S_IRWXU) < 0)
931: goto bad;
932: }
1.58 danh 933: vect[0] = xstrdup(np);
1.1 deraadt 934: sink(1, vect);
935: if (setimes) {
936: setimes = 0;
1.59 deraadt 937: if (utimes(vect[0], tv) < 0)
1.18 markus 938: run_err("%s: set times: %s",
1.59 deraadt 939: vect[0], strerror(errno));
1.1 deraadt 940: }
941: if (mod_flag)
1.59 deraadt 942: (void) chmod(vect[0], mode);
943: if (vect[0])
944: xfree(vect[0]);
1.1 deraadt 945: continue;
946: }
947: omode = mode;
948: mode |= S_IWRITE;
1.71 markus 949: if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
1.1 deraadt 950: bad: run_err("%s: %s", np, strerror(errno));
951: continue;
952: }
1.107 deraadt 953: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 954: if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) {
1.18 markus 955: (void) close(ofd);
1.1 deraadt 956: continue;
957: }
958: cp = bp->buf;
959: wrerr = NO;
1.7 deraadt 960:
1.12 aaron 961: statbytes = 0;
1.97 fgsch 962: if (showprogress)
963: start_progress_meter(curfile, size, &statbytes);
1.1 deraadt 964: for (count = i = 0; i < size; i += 4096) {
965: amt = 4096;
966: if (i + amt > size)
967: amt = size - i;
968: count += amt;
969: do {
1.117 avsm 970: j = atomicio(read, remin, cp, amt);
1.122 avsm 971: if (j == 0) {
1.1 deraadt 972: run_err("%s", j ? strerror(errno) :
1.63 stevesk 973: "dropped connection");
1.1 deraadt 974: exit(1);
975: }
976: amt -= j;
977: cp += j;
1.18 markus 978: statbytes += j;
1.1 deraadt 979: } while (amt > 0);
1.112 djm 980:
1.113 djm 981: if (limit_rate)
1.99 markus 982: bwlimit(4096);
983:
1.1 deraadt 984: if (count == bp->cnt) {
985: /* Keep reading so we stay sync'd up. */
986: if (wrerr == NO) {
1.122 avsm 987: if (atomicio(vwrite, ofd, bp->buf,
988: count) != count) {
1.1 deraadt 989: wrerr = YES;
1.122 avsm 990: wrerrno = errno;
1.1 deraadt 991: }
992: }
993: count = 0;
994: cp = bp->buf;
995: }
996: }
1.7 deraadt 997: if (showprogress)
1.97 fgsch 998: stop_progress_meter();
1.1 deraadt 999: if (count != 0 && wrerr == NO &&
1.122 avsm 1000: atomicio(vwrite, ofd, bp->buf, count) != count) {
1.1 deraadt 1001: wrerr = YES;
1.122 avsm 1002: wrerrno = errno;
1.1 deraadt 1003: }
1.98 djm 1004: if (wrerr == NO && ftruncate(ofd, size) != 0) {
1.1 deraadt 1005: run_err("%s: truncate: %s", np, strerror(errno));
1006: wrerr = DISPLAYED;
1007: }
1008: if (pflag) {
1009: if (exists || omode != mode)
1.116 dtucker 1010: if (fchmod(ofd, omode)) {
1.1 deraadt 1011: run_err("%s: set mode: %s",
1.63 stevesk 1012: np, strerror(errno));
1.116 dtucker 1013: wrerr = DISPLAYED;
1014: }
1.1 deraadt 1015: } else {
1016: if (!exists && omode != mode)
1.116 dtucker 1017: if (fchmod(ofd, omode & ~mask)) {
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: }
1.33 provos 1023: if (close(ofd) == -1) {
1024: wrerr = YES;
1025: wrerrno = errno;
1026: }
1.18 markus 1027: (void) response();
1.1 deraadt 1028: if (setimes && wrerr == NO) {
1029: setimes = 0;
1.40 markus 1030: if (utimes(np, tv) < 0) {
1.1 deraadt 1031: run_err("%s: set times: %s",
1.63 stevesk 1032: np, strerror(errno));
1.1 deraadt 1033: wrerr = DISPLAYED;
1034: }
1035: }
1.18 markus 1036: switch (wrerr) {
1.1 deraadt 1037: case YES:
1038: run_err("%s: %s", np, strerror(wrerrno));
1039: break;
1040: case NO:
1.107 deraadt 1041: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 1042: break;
1043: case DISPLAYED:
1044: break;
1045: }
1046: }
1047: screwup:
1048: run_err("protocol error: %s", why);
1049: exit(1);
1050: }
1051:
1052: int
1.86 itojun 1053: response(void)
1.1 deraadt 1054: {
1055: char ch, *cp, resp, rbuf[2048];
1056:
1.30 deraadt 1057: if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp))
1.1 deraadt 1058: lostconn(0);
1059:
1060: cp = rbuf;
1.18 markus 1061: switch (resp) {
1062: case 0: /* ok */
1.1 deraadt 1063: return (0);
1064: default:
1065: *cp++ = resp;
1066: /* FALLTHROUGH */
1.18 markus 1067: case 1: /* error, followed by error msg */
1068: case 2: /* fatal error, "" */
1.1 deraadt 1069: do {
1.30 deraadt 1070: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 1071: lostconn(0);
1072: *cp++ = ch;
1073: } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
1074:
1075: if (!iamremote)
1.107 deraadt 1076: (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf);
1.1 deraadt 1077: ++errs;
1078: if (resp == 1)
1079: return (-1);
1080: exit(1);
1081: }
1082: /* NOTREACHED */
1083: }
1084:
1085: void
1.86 itojun 1086: usage(void)
1.1 deraadt 1087: {
1.83 stevesk 1088: (void) fprintf(stderr,
1.110 jmc 1089: "usage: scp [-1246BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n"
1090: " [-l limit] [-o ssh_option] [-P port] [-S program]\n"
1.90 deraadt 1091: " [[user@]host1:]file1 [...] [[user@]host2:]file2\n");
1.1 deraadt 1092: exit(1);
1093: }
1094:
1095: void
1.18 markus 1096: run_err(const char *fmt,...)
1.1 deraadt 1097: {
1098: static FILE *fp;
1099: va_list ap;
1100:
1101: ++errs;
1.136 biorn 1102: if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) {
1103: (void) fprintf(fp, "%c", 0x01);
1104: (void) fprintf(fp, "scp: ");
1105: va_start(ap, fmt);
1106: (void) vfprintf(fp, fmt, ap);
1107: va_end(ap);
1108: (void) fprintf(fp, "\n");
1109: (void) fflush(fp);
1110: }
1.18 markus 1111:
1112: if (!iamremote) {
1.73 markus 1113: va_start(ap, fmt);
1.18 markus 1114: vfprintf(stderr, fmt, ap);
1.73 markus 1115: va_end(ap);
1.18 markus 1116: fprintf(stderr, "\n");
1117: }
1.1 deraadt 1118: }
1119:
1120: void
1.104 djm 1121: verifydir(char *cp)
1.1 deraadt 1122: {
1123: struct stat stb;
1124:
1125: if (!stat(cp, &stb)) {
1126: if (S_ISDIR(stb.st_mode))
1127: return;
1128: errno = ENOTDIR;
1129: }
1130: run_err("%s: %s", cp, strerror(errno));
1.123 avsm 1131: killchild(0);
1.1 deraadt 1132: }
1133:
1134: int
1.104 djm 1135: okname(char *cp0)
1.1 deraadt 1136: {
1137: int c;
1138: char *cp;
1139:
1140: cp = cp0;
1141: do {
1.75 deraadt 1142: c = (int)*cp;
1.1 deraadt 1143: if (c & 0200)
1144: goto bad;
1.101 markus 1145: if (!isalpha(c) && !isdigit(c)) {
1146: switch (c) {
1147: case '\'':
1148: case '"':
1149: case '`':
1150: case ' ':
1151: case '#':
1152: goto bad;
1153: default:
1154: break;
1155: }
1156: }
1.1 deraadt 1157: } while (*++cp);
1158: return (1);
1159:
1.25 markus 1160: bad: fprintf(stderr, "%s: invalid user name\n", cp0);
1.1 deraadt 1161: return (0);
1162: }
1163:
1164: BUF *
1.104 djm 1165: allocbuf(BUF *bp, int fd, int blksize)
1.1 deraadt 1166: {
1167: size_t size;
1168: struct stat stb;
1169:
1170: if (fstat(fd, &stb) < 0) {
1171: run_err("fstat: %s", strerror(errno));
1172: return (0);
1173: }
1.95 markus 1174: size = roundup(stb.st_blksize, blksize);
1175: if (size == 0)
1.18 markus 1176: size = blksize;
1.1 deraadt 1177: if (bp->cnt >= size)
1178: return (bp);
1.18 markus 1179: if (bp->buf == NULL)
1180: bp->buf = xmalloc(size);
1181: else
1.138 djm 1182: bp->buf = xrealloc(bp->buf, 1, size);
1.81 markus 1183: memset(bp->buf, 0, size);
1.1 deraadt 1184: bp->cnt = size;
1185: return (bp);
1186: }
1187:
1188: void
1.104 djm 1189: lostconn(int signo)
1.1 deraadt 1190: {
1191: if (!iamremote)
1.74 markus 1192: write(STDERR_FILENO, "lost connection\n", 16);
1193: if (signo)
1194: _exit(1);
1195: else
1196: exit(1);
1.4 aaron 1197: }
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