Annotation of src/usr.bin/ssh/scp.c, Revision 1.152
1.152 ! stevesk 1: /* $OpenBSD: scp.c,v 1.151 2006/07/25 02:59:21 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>
1.151 stevesk 79: #include <sys/time.h>
1.152 ! stevesk 80: #include <sys/param.h>
1.131 stevesk 81:
1.135 stevesk 82: #include <ctype.h>
1.131 stevesk 83: #include <dirent.h>
1.147 stevesk 84: #include <errno.h>
1.144 stevesk 85: #include <fcntl.h>
1.143 stevesk 86: #include <pwd.h>
1.133 stevesk 87: #include <signal.h>
1.146 stevesk 88: #include <stdarg.h>
1.150 stevesk 89: #include <string.h>
1.149 stevesk 90: #include <time.h>
1.148 stevesk 91: #include <unistd.h>
1.1 deraadt 92:
93: #include "xmalloc.h"
1.51 markus 94: #include "atomicio.h"
1.50 markus 95: #include "pathnames.h"
1.51 markus 96: #include "log.h"
1.69 mouring 97: #include "misc.h"
1.97 fgsch 98: #include "progressmeter.h"
1.1 deraadt 99:
1.140 deraadt 100: int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout);
1.11 aaron 101:
1.99 markus 102: void bwlimit(int);
103:
1.70 mouring 104: /* Struct for addargs */
105: arglist args;
1.41 markus 106:
1.99 markus 107: /* Bandwidth limit */
1.113 djm 108: off_t limit_rate = 0;
1.99 markus 109:
1.11 aaron 110: /* Name of current file being transferred. */
111: char *curfile;
1.4 aaron 112:
1.1 deraadt 113: /* This is set to non-zero to enable verbose mode. */
1.17 markus 114: int verbose_mode = 0;
1.1 deraadt 115:
1.6 aaron 116: /* This is set to zero if the progressmeter is not desired. */
117: int showprogress = 1;
118:
1.34 deraadt 119: /* This is the program to execute for the secured connection. ("ssh" or -S) */
1.50 markus 120: char *ssh_program = _PATH_SSH_PROGRAM;
1.34 deraadt 121:
1.92 markus 122: /* This is used to store the pid of ssh_program */
1.105 djm 123: pid_t do_cmd_pid = -1;
124:
125: static void
126: killchild(int signo)
127: {
1.119 dtucker 128: if (do_cmd_pid > 1) {
1.123 avsm 129: kill(do_cmd_pid, signo ? signo : SIGTERM);
1.119 dtucker 130: waitpid(do_cmd_pid, NULL, 0);
131: }
1.105 djm 132:
1.123 avsm 133: if (signo)
134: _exit(1);
135: exit(1);
1.105 djm 136: }
1.92 markus 137:
1.129 djm 138: static int
139: do_local_cmd(arglist *a)
140: {
141: u_int i;
142: int status;
143: pid_t pid;
144:
145: if (a->num == 0)
146: fatal("do_local_cmd: no arguments");
147:
148: if (verbose_mode) {
149: fprintf(stderr, "Executing:");
150: for (i = 0; i < a->num; i++)
151: fprintf(stderr, " %s", a->list[i]);
152: fprintf(stderr, "\n");
153: }
154: if ((pid = fork()) == -1)
155: fatal("do_local_cmd: fork: %s", strerror(errno));
156:
157: if (pid == 0) {
158: execvp(a->list[0], a->list);
159: perror(a->list[0]);
160: exit(1);
161: }
162:
163: do_cmd_pid = pid;
164: signal(SIGTERM, killchild);
165: signal(SIGINT, killchild);
166: signal(SIGHUP, killchild);
167:
168: while (waitpid(pid, &status, 0) == -1)
169: if (errno != EINTR)
170: fatal("do_local_cmd: waitpid: %s", strerror(errno));
171:
172: do_cmd_pid = -1;
173:
174: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
175: return (-1);
176:
177: return (0);
178: }
179:
1.20 markus 180: /*
181: * This function executes the given command as the specified user on the
182: * given host. This returns < 0 if execution fails, and >= 0 otherwise. This
183: * assigns the input and output file descriptors on success.
184: */
1.1 deraadt 185:
1.27 markus 186: int
1.140 deraadt 187: do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout)
1.1 deraadt 188: {
1.18 markus 189: int pin[2], pout[2], reserved[2];
190:
191: if (verbose_mode)
1.78 deraadt 192: fprintf(stderr,
193: "Executing: program %s host %s, user %s, command %s\n",
194: ssh_program, host,
195: remuser ? remuser : "(unspecified)", cmd);
1.18 markus 196:
1.20 markus 197: /*
198: * Reserve two descriptors so that the real pipes won't get
199: * descriptors 0 and 1 because that will screw up dup2 below.
200: */
1.142 markus 201: if (pipe(reserved) < 0)
202: fatal("pipe: %s", strerror(errno));
1.18 markus 203:
204: /* Create a socket pair for communicating with ssh. */
205: if (pipe(pin) < 0)
206: fatal("pipe: %s", strerror(errno));
207: if (pipe(pout) < 0)
208: fatal("pipe: %s", strerror(errno));
209:
210: /* Free the reserved descriptors. */
211: close(reserved[0]);
212: close(reserved[1]);
213:
1.106 nino 214: /* Fork a child to execute the command on the remote host using ssh. */
1.92 markus 215: do_cmd_pid = fork();
216: if (do_cmd_pid == 0) {
1.18 markus 217: /* Child. */
218: close(pin[1]);
219: close(pout[0]);
220: dup2(pin[0], 0);
221: dup2(pout[1], 1);
222: close(pin[0]);
223: close(pout[1]);
224:
1.129 djm 225: replacearg(&args, 0, "%s", ssh_program);
1.41 markus 226: if (remuser != NULL)
1.70 mouring 227: addargs(&args, "-l%s", remuser);
228: addargs(&args, "%s", host);
229: addargs(&args, "%s", cmd);
1.18 markus 230:
1.41 markus 231: execvp(ssh_program, args.list);
1.34 deraadt 232: perror(ssh_program);
1.18 markus 233: exit(1);
1.92 markus 234: } else if (do_cmd_pid == -1) {
235: fatal("fork: %s", strerror(errno));
1.18 markus 236: }
237: /* Parent. Close the other side, and return the local side. */
238: close(pin[0]);
239: *fdout = pin[1];
240: close(pout[1]);
241: *fdin = pout[0];
1.105 djm 242: signal(SIGTERM, killchild);
243: signal(SIGINT, killchild);
244: signal(SIGHUP, killchild);
1.18 markus 245: return 0;
1.1 deraadt 246: }
247:
248: typedef struct {
1.124 djm 249: size_t cnt;
1.1 deraadt 250: char *buf;
251: } BUF;
252:
1.18 markus 253: BUF *allocbuf(BUF *, int, int);
254: void lostconn(int);
255: int okname(char *);
256: void run_err(const char *,...);
257: void verifydir(char *);
1.1 deraadt 258:
259: struct passwd *pwd;
1.18 markus 260: uid_t userid;
1.1 deraadt 261: int errs, remin, remout;
262: int pflag, iamremote, iamrecursive, targetshouldbedirectory;
263:
264: #define CMDNEEDS 64
265: char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
266:
1.18 markus 267: int response(void);
268: void rsource(char *, struct stat *);
269: void sink(int, char *[]);
270: void source(int, char *[]);
271: void tolocal(int, char *[]);
272: void toremote(char *, int, char *[]);
273: void usage(void);
1.1 deraadt 274:
275: int
1.104 djm 276: main(int argc, char **argv)
1.1 deraadt 277: {
1.145 djm 278: int ch, fflag, tflag, status, n;
1.99 markus 279: double speed;
1.145 djm 280: char *targ, *endp, **newargv;
1.1 deraadt 281: extern char *optarg;
282: extern int optind;
1.126 djm 283:
284: /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
285: sanitise_stdfd();
1.145 djm 286:
287: /* Copy argv, because we modify it */
288: newargv = xcalloc(MAX(argc + 1, 1), sizeof(*newargv));
289: for (n = 0; n < argc; n++)
290: newargv[n] = xstrdup(argv[n]);
291: argv = newargv;
1.1 deraadt 292:
1.129 djm 293: memset(&args, '\0', sizeof(args));
1.41 markus 294: args.list = NULL;
1.129 djm 295: addargs(&args, "%s", ssh_program);
1.70 mouring 296: addargs(&args, "-x");
1.82 stevesk 297: addargs(&args, "-oForwardAgent no");
1.128 reyk 298: addargs(&args, "-oPermitLocalCommand no");
1.84 stevesk 299: addargs(&args, "-oClearAllForwardings yes");
1.41 markus 300:
1.1 deraadt 301: fflag = tflag = 0;
1.100 markus 302: while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q1246S:o:F:")) != -1)
1.18 markus 303: switch (ch) {
304: /* User-visible flags. */
1.100 markus 305: case '1':
306: case '2':
1.23 markus 307: case '4':
1.41 markus 308: case '6':
309: case 'C':
1.70 mouring 310: addargs(&args, "-%c", ch);
1.41 markus 311: break;
312: case 'o':
313: case 'c':
314: case 'i':
1.83 stevesk 315: case 'F':
1.70 mouring 316: addargs(&args, "-%c%s", ch, optarg);
1.23 markus 317: break;
1.41 markus 318: case 'P':
1.70 mouring 319: addargs(&args, "-p%s", optarg);
1.41 markus 320: break;
321: case 'B':
1.70 mouring 322: addargs(&args, "-oBatchmode yes");
1.23 markus 323: break;
1.99 markus 324: case 'l':
325: speed = strtod(optarg, &endp);
326: if (speed <= 0 || *endp != '\0')
327: usage();
1.113 djm 328: limit_rate = speed * 1024;
1.99 markus 329: break;
1.1 deraadt 330: case 'p':
331: pflag = 1;
332: break;
333: case 'r':
334: iamrecursive = 1;
335: break;
1.34 deraadt 336: case 'S':
1.41 markus 337: ssh_program = xstrdup(optarg);
338: break;
339: case 'v':
1.72 markus 340: addargs(&args, "-v");
1.41 markus 341: verbose_mode = 1;
342: break;
343: case 'q':
1.111 dtucker 344: addargs(&args, "-q");
1.41 markus 345: showprogress = 0;
1.34 deraadt 346: break;
347:
1.18 markus 348: /* Server options. */
1.1 deraadt 349: case 'd':
350: targetshouldbedirectory = 1;
351: break;
1.18 markus 352: case 'f': /* "from" */
1.1 deraadt 353: iamremote = 1;
354: fflag = 1;
355: break;
1.18 markus 356: case 't': /* "to" */
1.1 deraadt 357: iamremote = 1;
358: tflag = 1;
359: break;
360: default:
361: usage();
362: }
363: argc -= optind;
364: argv += optind;
365:
366: if ((pwd = getpwuid(userid = getuid())) == NULL)
1.108 deraadt 367: fatal("unknown user %u", (u_int) userid);
1.1 deraadt 368:
1.18 markus 369: if (!isatty(STDERR_FILENO))
1.7 deraadt 370: showprogress = 0;
371:
1.1 deraadt 372: remin = STDIN_FILENO;
373: remout = STDOUT_FILENO;
374:
1.52 stevesk 375: if (fflag) {
1.18 markus 376: /* Follow "protocol", send data. */
377: (void) response();
1.1 deraadt 378: source(argc, argv);
379: exit(errs != 0);
380: }
1.18 markus 381: if (tflag) {
382: /* Receive data. */
1.1 deraadt 383: sink(argc, argv);
384: exit(errs != 0);
385: }
386: if (argc < 2)
387: usage();
388: if (argc > 2)
389: targetshouldbedirectory = 1;
390:
391: remin = remout = -1;
1.92 markus 392: do_cmd_pid = -1;
1.1 deraadt 393: /* Command to be executed on remote system using "ssh". */
1.55 deraadt 394: (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
395: verbose_mode ? " -v" : "",
1.35 deraadt 396: iamrecursive ? " -r" : "", pflag ? " -p" : "",
397: targetshouldbedirectory ? " -d" : "");
1.1 deraadt 398:
1.18 markus 399: (void) signal(SIGPIPE, lostconn);
1.1 deraadt 400:
401: if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */
402: toremote(targ, argc, argv);
403: else {
404: if (targetshouldbedirectory)
405: verifydir(argv[argc - 1]);
1.130 djm 406: tolocal(argc, argv); /* Dest is local host. */
1.92 markus 407: }
408: /*
409: * Finally check the exit status of the ssh process, if one was forked
410: * and no error has occured yet
411: */
412: if (do_cmd_pid != -1 && errs == 0) {
413: if (remin != -1)
414: (void) close(remin);
415: if (remout != -1)
416: (void) close(remout);
417: if (waitpid(do_cmd_pid, &status, 0) == -1)
418: errs = 1;
419: else {
420: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
421: errs = 1;
422: }
1.1 deraadt 423: }
424: exit(errs != 0);
425: }
426:
427: void
1.104 djm 428: toremote(char *targ, int argc, char **argv)
1.1 deraadt 429: {
1.120 deraadt 430: char *bp, *host, *src, *suser, *thost, *tuser, *arg;
1.129 djm 431: arglist alist;
1.140 deraadt 432: int i;
1.129 djm 433:
434: memset(&alist, '\0', sizeof(alist));
435: alist.list = NULL;
1.1 deraadt 436:
437: *targ++ = 0;
438: if (*targ == 0)
439: targ = ".";
440:
1.121 djm 441: arg = xstrdup(argv[argc - 1]);
1.120 deraadt 442: if ((thost = strrchr(arg, '@'))) {
1.1 deraadt 443: /* user@host */
444: *thost++ = 0;
1.120 deraadt 445: tuser = arg;
1.1 deraadt 446: if (*tuser == '\0')
447: tuser = NULL;
448: } else {
1.120 deraadt 449: thost = arg;
1.1 deraadt 450: tuser = NULL;
451: }
452:
1.129 djm 453: if (tuser != NULL && !okname(tuser)) {
454: xfree(arg);
455: return;
456: }
457:
1.1 deraadt 458: for (i = 0; i < argc - 1; i++) {
459: src = colon(argv[i]);
1.18 markus 460: if (src) { /* remote to remote */
1.129 djm 461: freeargs(&alist);
462: addargs(&alist, "%s", ssh_program);
463: if (verbose_mode)
464: addargs(&alist, "-v");
465: addargs(&alist, "-x");
466: addargs(&alist, "-oClearAllForwardings yes");
467: addargs(&alist, "-n");
468:
1.1 deraadt 469: *src++ = 0;
470: if (*src == 0)
471: src = ".";
1.94 markus 472: host = strrchr(argv[i], '@');
1.129 djm 473:
1.1 deraadt 474: if (host) {
475: *host++ = 0;
1.23 markus 476: host = cleanhostname(host);
1.1 deraadt 477: suser = argv[i];
478: if (*suser == '\0')
479: suser = pwd->pw_name;
1.129 djm 480: else if (!okname(suser))
1.101 markus 481: continue;
1.129 djm 482: addargs(&alist, "-l");
483: addargs(&alist, "%s", suser);
1.23 markus 484: } else {
485: host = cleanhostname(argv[i]);
486: }
1.129 djm 487: addargs(&alist, "%s", host);
488: addargs(&alist, "%s", cmd);
489: addargs(&alist, "%s", src);
490: addargs(&alist, "%s%s%s:%s",
491: tuser ? tuser : "", tuser ? "@" : "",
492: thost, targ);
493: if (do_local_cmd(&alist) != 0)
1.109 markus 494: errs = 1;
1.18 markus 495: } else { /* local to remote */
1.1 deraadt 496: if (remin == -1) {
1.141 djm 497: xasprintf(&bp, "%s -t %s", cmd, targ);
1.23 markus 498: host = cleanhostname(thost);
1.35 deraadt 499: if (do_cmd(host, tuser, bp, &remin,
1.140 deraadt 500: &remout) < 0)
1.18 markus 501: exit(1);
1.1 deraadt 502: if (response() < 0)
503: exit(1);
1.18 markus 504: (void) xfree(bp);
1.1 deraadt 505: }
1.18 markus 506: source(1, argv + i);
1.1 deraadt 507: }
508: }
1.142 markus 509: xfree(arg);
1.1 deraadt 510: }
511:
512: void
1.104 djm 513: tolocal(int argc, char **argv)
1.1 deraadt 514: {
515: char *bp, *host, *src, *suser;
1.129 djm 516: arglist alist;
1.140 deraadt 517: int i;
1.129 djm 518:
519: memset(&alist, '\0', sizeof(alist));
520: alist.list = NULL;
1.1 deraadt 521:
522: for (i = 0; i < argc - 1; i++) {
1.18 markus 523: if (!(src = colon(argv[i]))) { /* Local to local. */
1.129 djm 524: freeargs(&alist);
525: addargs(&alist, "%s", _PATH_CP);
526: if (iamrecursive)
527: addargs(&alist, "-r");
528: if (pflag)
529: addargs(&alist, "-p");
530: addargs(&alist, "%s", argv[i]);
531: addargs(&alist, "%s", argv[argc-1]);
532: if (do_local_cmd(&alist))
1.1 deraadt 533: ++errs;
534: continue;
535: }
536: *src++ = 0;
537: if (*src == 0)
538: src = ".";
1.94 markus 539: if ((host = strrchr(argv[i], '@')) == NULL) {
1.1 deraadt 540: host = argv[i];
541: suser = NULL;
542: } else {
543: *host++ = 0;
544: suser = argv[i];
545: if (*suser == '\0')
546: suser = pwd->pw_name;
547: }
1.23 markus 548: host = cleanhostname(host);
1.141 djm 549: xasprintf(&bp, "%s -f %s", cmd, src);
1.140 deraadt 550: if (do_cmd(host, suser, bp, &remin, &remout) < 0) {
1.18 markus 551: (void) xfree(bp);
552: ++errs;
553: continue;
1.1 deraadt 554: }
1.18 markus 555: xfree(bp);
1.1 deraadt 556: sink(1, argv + argc - 1);
1.18 markus 557: (void) close(remin);
1.1 deraadt 558: remin = remout = -1;
559: }
560: }
561:
562: void
1.104 djm 563: source(int argc, char **argv)
1.1 deraadt 564: {
565: struct stat stb;
566: static BUF buffer;
567: BUF *bp;
1.122 avsm 568: off_t i, amt, statbytes;
569: size_t result;
1.125 dtucker 570: int fd = -1, haderr, indx;
1.1 deraadt 571: char *last, *name, buf[2048];
1.65 deraadt 572: int len;
1.1 deraadt 573:
574: for (indx = 0; indx < argc; ++indx) {
1.18 markus 575: name = argv[indx];
1.11 aaron 576: statbytes = 0;
1.65 deraadt 577: len = strlen(name);
578: while (len > 1 && name[len-1] == '/')
579: name[--len] = '\0';
1.85 markus 580: if (strchr(name, '\n') != NULL) {
581: run_err("%s: skipping, filename contains a newline",
582: name);
583: goto next;
584: }
1.1 deraadt 585: if ((fd = open(name, O_RDONLY, 0)) < 0)
586: goto syserr;
587: if (fstat(fd, &stb) < 0) {
588: syserr: run_err("%s: %s", name, strerror(errno));
589: goto next;
590: }
591: switch (stb.st_mode & S_IFMT) {
592: case S_IFREG:
593: break;
594: case S_IFDIR:
595: if (iamrecursive) {
596: rsource(name, &stb);
597: goto next;
598: }
599: /* FALLTHROUGH */
600: default:
601: run_err("%s: not a regular file", name);
602: goto next;
603: }
604: if ((last = strrchr(name, '/')) == NULL)
605: last = name;
606: else
607: ++last;
1.11 aaron 608: curfile = last;
1.1 deraadt 609: if (pflag) {
610: /*
611: * Make it compatible with possible future
612: * versions expecting microseconds.
613: */
1.55 deraadt 614: (void) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n",
1.47 markus 615: (u_long) stb.st_mtime,
616: (u_long) stb.st_atime);
1.107 deraadt 617: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 618: if (response() < 0)
619: goto next;
620: }
621: #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
1.61 markus 622: snprintf(buf, sizeof buf, "C%04o %lld %s\n",
1.47 markus 623: (u_int) (stb.st_mode & FILEMODEMASK),
1.62 markus 624: (long long)stb.st_size, last);
1.18 markus 625: if (verbose_mode) {
626: fprintf(stderr, "Sending file modes: %s", buf);
627: }
1.107 deraadt 628: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 629: if (response() < 0)
630: goto next;
631: if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) {
1.127 deraadt 632: next: if (fd != -1) {
633: (void) close(fd);
634: fd = -1;
635: }
1.1 deraadt 636: continue;
637: }
1.97 fgsch 638: if (showprogress)
639: start_progress_meter(curfile, stb.st_size, &statbytes);
1.1 deraadt 640: /* Keep writing after an error so that we stay sync'd up. */
641: for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
642: amt = bp->cnt;
643: if (i + amt > stb.st_size)
644: amt = stb.st_size - i;
645: if (!haderr) {
1.30 deraadt 646: result = atomicio(read, fd, bp->buf, amt);
1.1 deraadt 647: if (result != amt)
1.122 avsm 648: haderr = errno;
1.1 deraadt 649: }
650: if (haderr)
1.107 deraadt 651: (void) atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 652: else {
1.107 deraadt 653: result = atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 654: if (result != amt)
1.122 avsm 655: haderr = errno;
1.4 aaron 656: statbytes += result;
1.1 deraadt 657: }
1.113 djm 658: if (limit_rate)
1.99 markus 659: bwlimit(amt);
1.1 deraadt 660: }
1.18 markus 661: if (showprogress)
1.97 fgsch 662: stop_progress_meter();
1.4 aaron 663:
1.127 deraadt 664: if (fd != -1) {
665: if (close(fd) < 0 && !haderr)
666: haderr = errno;
667: fd = -1;
668: }
1.1 deraadt 669: if (!haderr)
1.107 deraadt 670: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 671: else
672: run_err("%s: %s", name, strerror(haderr));
1.18 markus 673: (void) response();
1.1 deraadt 674: }
675: }
676:
677: void
1.104 djm 678: rsource(char *name, struct stat *statp)
1.1 deraadt 679: {
680: DIR *dirp;
681: struct dirent *dp;
682: char *last, *vect[1], path[1100];
683:
684: if (!(dirp = opendir(name))) {
685: run_err("%s: %s", name, strerror(errno));
686: return;
687: }
688: last = strrchr(name, '/');
689: if (last == 0)
690: last = name;
691: else
692: last++;
693: if (pflag) {
1.55 deraadt 694: (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n",
1.47 markus 695: (u_long) statp->st_mtime,
696: (u_long) statp->st_atime);
1.107 deraadt 697: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 698: if (response() < 0) {
699: closedir(dirp);
700: return;
701: }
702: }
1.55 deraadt 703: (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n",
1.47 markus 704: (u_int) (statp->st_mode & FILEMODEMASK), 0, last);
1.18 markus 705: if (verbose_mode)
706: fprintf(stderr, "Entering directory: %s", path);
1.107 deraadt 707: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 708: if (response() < 0) {
709: closedir(dirp);
710: return;
711: }
1.63 stevesk 712: while ((dp = readdir(dirp)) != NULL) {
1.1 deraadt 713: if (dp->d_ino == 0)
714: continue;
715: if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
716: continue;
717: if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) {
718: run_err("%s/%s: name too long", name, dp->d_name);
719: continue;
720: }
1.55 deraadt 721: (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name);
1.1 deraadt 722: vect[0] = path;
723: source(1, vect);
724: }
1.18 markus 725: (void) closedir(dirp);
1.107 deraadt 726: (void) atomicio(vwrite, remout, "E\n", 2);
1.18 markus 727: (void) response();
1.1 deraadt 728: }
729:
730: void
1.99 markus 731: bwlimit(int amount)
732: {
733: static struct timeval bwstart, bwend;
734: static int lamt, thresh = 16384;
1.115 avsm 735: u_int64_t waitlen;
1.99 markus 736: struct timespec ts, rm;
737:
738: if (!timerisset(&bwstart)) {
739: gettimeofday(&bwstart, NULL);
740: return;
741: }
742:
743: lamt += amount;
744: if (lamt < thresh)
745: return;
746:
747: gettimeofday(&bwend, NULL);
748: timersub(&bwend, &bwstart, &bwend);
749: if (!timerisset(&bwend))
750: return;
751:
752: lamt *= 8;
1.115 avsm 753: waitlen = (double)1000000L * lamt / limit_rate;
1.99 markus 754:
1.115 avsm 755: bwstart.tv_sec = waitlen / 1000000L;
756: bwstart.tv_usec = waitlen % 1000000L;
1.99 markus 757:
758: if (timercmp(&bwstart, &bwend, >)) {
759: timersub(&bwstart, &bwend, &bwend);
760:
761: /* Adjust the wait time */
762: if (bwend.tv_sec) {
763: thresh /= 2;
764: if (thresh < 2048)
765: thresh = 2048;
766: } else if (bwend.tv_usec < 100) {
767: thresh *= 2;
768: if (thresh > 32768)
769: thresh = 32768;
770: }
771:
772: TIMEVAL_TO_TIMESPEC(&bwend, &ts);
773: while (nanosleep(&ts, &rm) == -1) {
774: if (errno != EINTR)
775: break;
776: ts = rm;
777: }
778: }
779:
780: lamt = 0;
781: gettimeofday(&bwstart, NULL);
782: }
783:
784: void
1.104 djm 785: sink(int argc, char **argv)
1.1 deraadt 786: {
787: static BUF buffer;
788: struct stat stb;
1.18 markus 789: enum {
790: YES, NO, DISPLAYED
791: } wrerr;
1.1 deraadt 792: BUF *bp;
1.122 avsm 793: off_t i;
1.124 djm 794: size_t j, count;
1.140 deraadt 795: int amt, exists, first, ofd;
796: mode_t mode, omode, mask;
1.97 fgsch 797: off_t size, statbytes;
1.36 deraadt 798: int setimes, targisdir, wrerrno = 0;
1.1 deraadt 799: char ch, *cp, *np, *targ, *why, *vect[1], buf[2048];
1.40 markus 800: struct timeval tv[2];
1.1 deraadt 801:
1.66 stevesk 802: #define atime tv[0]
803: #define mtime tv[1]
1.118 deraadt 804: #define SCREWUP(str) { why = str; goto screwup; }
1.1 deraadt 805:
806: setimes = targisdir = 0;
807: mask = umask(0);
808: if (!pflag)
1.18 markus 809: (void) umask(mask);
1.1 deraadt 810: if (argc != 1) {
811: run_err("ambiguous target");
812: exit(1);
813: }
814: targ = *argv;
815: if (targetshouldbedirectory)
816: verifydir(targ);
1.18 markus 817:
1.107 deraadt 818: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 819: if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
820: targisdir = 1;
821: for (first = 1;; first = 0) {
822: cp = buf;
1.122 avsm 823: if (atomicio(read, remin, cp, 1) != 1)
1.1 deraadt 824: return;
825: if (*cp++ == '\n')
826: SCREWUP("unexpected <newline>");
827: do {
1.30 deraadt 828: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 829: SCREWUP("lost connection");
830: *cp++ = ch;
831: } while (cp < &buf[sizeof(buf) - 1] && ch != '\n');
832: *cp = 0;
1.114 markus 833: if (verbose_mode)
834: fprintf(stderr, "Sink: %s", buf);
1.1 deraadt 835:
836: if (buf[0] == '\01' || buf[0] == '\02') {
837: if (iamremote == 0)
1.107 deraadt 838: (void) atomicio(vwrite, STDERR_FILENO,
1.44 deraadt 839: buf + 1, strlen(buf + 1));
1.1 deraadt 840: if (buf[0] == '\02')
841: exit(1);
842: ++errs;
843: continue;
844: }
845: if (buf[0] == 'E') {
1.107 deraadt 846: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 847: return;
848: }
849: if (ch == '\n')
850: *--cp = 0;
851:
852: cp = buf;
853: if (*cp == 'T') {
854: setimes++;
855: cp++;
1.66 stevesk 856: mtime.tv_sec = strtol(cp, &cp, 10);
857: if (!cp || *cp++ != ' ')
1.1 deraadt 858: SCREWUP("mtime.sec not delimited");
1.66 stevesk 859: mtime.tv_usec = strtol(cp, &cp, 10);
860: if (!cp || *cp++ != ' ')
1.1 deraadt 861: SCREWUP("mtime.usec not delimited");
1.66 stevesk 862: atime.tv_sec = strtol(cp, &cp, 10);
863: if (!cp || *cp++ != ' ')
1.1 deraadt 864: SCREWUP("atime.sec not delimited");
1.66 stevesk 865: atime.tv_usec = strtol(cp, &cp, 10);
866: if (!cp || *cp++ != '\0')
1.1 deraadt 867: SCREWUP("atime.usec not delimited");
1.107 deraadt 868: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 869: continue;
870: }
871: if (*cp != 'C' && *cp != 'D') {
872: /*
873: * Check for the case "rcp remote:foo\* local:bar".
874: * In this case, the line "No match." can be returned
875: * by the shell before the rcp command on the remote is
876: * executed so the ^Aerror_message convention isn't
877: * followed.
878: */
879: if (first) {
880: run_err("%s", cp);
881: exit(1);
882: }
883: SCREWUP("expected control record");
884: }
885: mode = 0;
886: for (++cp; cp < buf + 5; cp++) {
887: if (*cp < '0' || *cp > '7')
888: SCREWUP("bad mode");
889: mode = (mode << 3) | (*cp - '0');
890: }
891: if (*cp++ != ' ')
892: SCREWUP("mode not delimited");
893:
1.63 stevesk 894: for (size = 0; isdigit(*cp);)
1.1 deraadt 895: size = size * 10 + (*cp++ - '0');
896: if (*cp++ != ' ')
897: SCREWUP("size not delimited");
1.114 markus 898: if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) {
899: run_err("error: unexpected filename: %s", cp);
900: exit(1);
901: }
1.1 deraadt 902: if (targisdir) {
903: static char *namebuf;
1.124 djm 904: static size_t cursize;
1.1 deraadt 905: size_t need;
906:
907: need = strlen(targ) + strlen(cp) + 250;
1.55 deraadt 908: if (need > cursize) {
1.58 danh 909: if (namebuf)
910: xfree(namebuf);
1.18 markus 911: namebuf = xmalloc(need);
1.55 deraadt 912: cursize = need;
913: }
914: (void) snprintf(namebuf, need, "%s%s%s", targ,
1.88 mouring 915: strcmp(targ, "/") ? "/" : "", cp);
1.1 deraadt 916: np = namebuf;
917: } else
918: np = targ;
1.12 aaron 919: curfile = cp;
1.1 deraadt 920: exists = stat(np, &stb) == 0;
921: if (buf[0] == 'D') {
922: int mod_flag = pflag;
1.114 markus 923: if (!iamrecursive)
924: SCREWUP("received directory without -r");
1.1 deraadt 925: if (exists) {
926: if (!S_ISDIR(stb.st_mode)) {
927: errno = ENOTDIR;
928: goto bad;
929: }
930: if (pflag)
1.18 markus 931: (void) chmod(np, mode);
1.1 deraadt 932: } else {
1.18 markus 933: /* Handle copying from a read-only
934: directory */
1.1 deraadt 935: mod_flag = 1;
936: if (mkdir(np, mode | S_IRWXU) < 0)
937: goto bad;
938: }
1.58 danh 939: vect[0] = xstrdup(np);
1.1 deraadt 940: sink(1, vect);
941: if (setimes) {
942: setimes = 0;
1.59 deraadt 943: if (utimes(vect[0], tv) < 0)
1.18 markus 944: run_err("%s: set times: %s",
1.59 deraadt 945: vect[0], strerror(errno));
1.1 deraadt 946: }
947: if (mod_flag)
1.59 deraadt 948: (void) chmod(vect[0], mode);
949: if (vect[0])
950: xfree(vect[0]);
1.1 deraadt 951: continue;
952: }
953: omode = mode;
954: mode |= S_IWRITE;
1.71 markus 955: if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
1.1 deraadt 956: bad: run_err("%s: %s", np, strerror(errno));
957: continue;
958: }
1.107 deraadt 959: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 960: if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) {
1.18 markus 961: (void) close(ofd);
1.1 deraadt 962: continue;
963: }
964: cp = bp->buf;
965: wrerr = NO;
1.7 deraadt 966:
1.12 aaron 967: statbytes = 0;
1.97 fgsch 968: if (showprogress)
969: start_progress_meter(curfile, size, &statbytes);
1.1 deraadt 970: for (count = i = 0; i < size; i += 4096) {
971: amt = 4096;
972: if (i + amt > size)
973: amt = size - i;
974: count += amt;
975: do {
1.117 avsm 976: j = atomicio(read, remin, cp, amt);
1.122 avsm 977: if (j == 0) {
1.1 deraadt 978: run_err("%s", j ? strerror(errno) :
1.63 stevesk 979: "dropped connection");
1.1 deraadt 980: exit(1);
981: }
982: amt -= j;
983: cp += j;
1.18 markus 984: statbytes += j;
1.1 deraadt 985: } while (amt > 0);
1.112 djm 986:
1.113 djm 987: if (limit_rate)
1.99 markus 988: bwlimit(4096);
989:
1.1 deraadt 990: if (count == bp->cnt) {
991: /* Keep reading so we stay sync'd up. */
992: if (wrerr == NO) {
1.122 avsm 993: if (atomicio(vwrite, ofd, bp->buf,
994: count) != count) {
1.1 deraadt 995: wrerr = YES;
1.122 avsm 996: wrerrno = errno;
1.1 deraadt 997: }
998: }
999: count = 0;
1000: cp = bp->buf;
1001: }
1002: }
1.7 deraadt 1003: if (showprogress)
1.97 fgsch 1004: stop_progress_meter();
1.1 deraadt 1005: if (count != 0 && wrerr == NO &&
1.122 avsm 1006: atomicio(vwrite, ofd, bp->buf, count) != count) {
1.1 deraadt 1007: wrerr = YES;
1.122 avsm 1008: wrerrno = errno;
1.1 deraadt 1009: }
1.98 djm 1010: if (wrerr == NO && ftruncate(ofd, size) != 0) {
1.1 deraadt 1011: run_err("%s: truncate: %s", np, strerror(errno));
1012: wrerr = DISPLAYED;
1013: }
1014: if (pflag) {
1015: if (exists || omode != mode)
1.116 dtucker 1016: if (fchmod(ofd, omode)) {
1.1 deraadt 1017: run_err("%s: set mode: %s",
1.63 stevesk 1018: np, strerror(errno));
1.116 dtucker 1019: wrerr = DISPLAYED;
1020: }
1.1 deraadt 1021: } else {
1022: if (!exists && omode != mode)
1.116 dtucker 1023: if (fchmod(ofd, omode & ~mask)) {
1.1 deraadt 1024: run_err("%s: set mode: %s",
1.63 stevesk 1025: np, strerror(errno));
1.116 dtucker 1026: wrerr = DISPLAYED;
1027: }
1.1 deraadt 1028: }
1.33 provos 1029: if (close(ofd) == -1) {
1030: wrerr = YES;
1031: wrerrno = errno;
1032: }
1.18 markus 1033: (void) response();
1.1 deraadt 1034: if (setimes && wrerr == NO) {
1035: setimes = 0;
1.40 markus 1036: if (utimes(np, tv) < 0) {
1.1 deraadt 1037: run_err("%s: set times: %s",
1.63 stevesk 1038: np, strerror(errno));
1.1 deraadt 1039: wrerr = DISPLAYED;
1040: }
1041: }
1.18 markus 1042: switch (wrerr) {
1.1 deraadt 1043: case YES:
1044: run_err("%s: %s", np, strerror(wrerrno));
1045: break;
1046: case NO:
1.107 deraadt 1047: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 1048: break;
1049: case DISPLAYED:
1050: break;
1051: }
1052: }
1053: screwup:
1054: run_err("protocol error: %s", why);
1055: exit(1);
1056: }
1057:
1058: int
1.86 itojun 1059: response(void)
1.1 deraadt 1060: {
1061: char ch, *cp, resp, rbuf[2048];
1062:
1.30 deraadt 1063: if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp))
1.1 deraadt 1064: lostconn(0);
1065:
1066: cp = rbuf;
1.18 markus 1067: switch (resp) {
1068: case 0: /* ok */
1.1 deraadt 1069: return (0);
1070: default:
1071: *cp++ = resp;
1072: /* FALLTHROUGH */
1.18 markus 1073: case 1: /* error, followed by error msg */
1074: case 2: /* fatal error, "" */
1.1 deraadt 1075: do {
1.30 deraadt 1076: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 1077: lostconn(0);
1078: *cp++ = ch;
1079: } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
1080:
1081: if (!iamremote)
1.107 deraadt 1082: (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf);
1.1 deraadt 1083: ++errs;
1084: if (resp == 1)
1085: return (-1);
1086: exit(1);
1087: }
1088: /* NOTREACHED */
1089: }
1090:
1091: void
1.86 itojun 1092: usage(void)
1.1 deraadt 1093: {
1.83 stevesk 1094: (void) fprintf(stderr,
1.110 jmc 1095: "usage: scp [-1246BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n"
1096: " [-l limit] [-o ssh_option] [-P port] [-S program]\n"
1.90 deraadt 1097: " [[user@]host1:]file1 [...] [[user@]host2:]file2\n");
1.1 deraadt 1098: exit(1);
1099: }
1100:
1101: void
1.18 markus 1102: run_err(const char *fmt,...)
1.1 deraadt 1103: {
1104: static FILE *fp;
1105: va_list ap;
1106:
1107: ++errs;
1.136 biorn 1108: if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) {
1109: (void) fprintf(fp, "%c", 0x01);
1110: (void) fprintf(fp, "scp: ");
1111: va_start(ap, fmt);
1112: (void) vfprintf(fp, fmt, ap);
1113: va_end(ap);
1114: (void) fprintf(fp, "\n");
1115: (void) fflush(fp);
1116: }
1.18 markus 1117:
1118: if (!iamremote) {
1.73 markus 1119: va_start(ap, fmt);
1.18 markus 1120: vfprintf(stderr, fmt, ap);
1.73 markus 1121: va_end(ap);
1.18 markus 1122: fprintf(stderr, "\n");
1123: }
1.1 deraadt 1124: }
1125:
1126: void
1.104 djm 1127: verifydir(char *cp)
1.1 deraadt 1128: {
1129: struct stat stb;
1130:
1131: if (!stat(cp, &stb)) {
1132: if (S_ISDIR(stb.st_mode))
1133: return;
1134: errno = ENOTDIR;
1135: }
1136: run_err("%s: %s", cp, strerror(errno));
1.123 avsm 1137: killchild(0);
1.1 deraadt 1138: }
1139:
1140: int
1.104 djm 1141: okname(char *cp0)
1.1 deraadt 1142: {
1143: int c;
1144: char *cp;
1145:
1146: cp = cp0;
1147: do {
1.75 deraadt 1148: c = (int)*cp;
1.1 deraadt 1149: if (c & 0200)
1150: goto bad;
1.101 markus 1151: if (!isalpha(c) && !isdigit(c)) {
1152: switch (c) {
1153: case '\'':
1154: case '"':
1155: case '`':
1156: case ' ':
1157: case '#':
1158: goto bad;
1159: default:
1160: break;
1161: }
1162: }
1.1 deraadt 1163: } while (*++cp);
1164: return (1);
1165:
1.25 markus 1166: bad: fprintf(stderr, "%s: invalid user name\n", cp0);
1.1 deraadt 1167: return (0);
1168: }
1169:
1170: BUF *
1.104 djm 1171: allocbuf(BUF *bp, int fd, int blksize)
1.1 deraadt 1172: {
1173: size_t size;
1174: struct stat stb;
1175:
1176: if (fstat(fd, &stb) < 0) {
1177: run_err("fstat: %s", strerror(errno));
1178: return (0);
1179: }
1.95 markus 1180: size = roundup(stb.st_blksize, blksize);
1181: if (size == 0)
1.18 markus 1182: size = blksize;
1.1 deraadt 1183: if (bp->cnt >= size)
1184: return (bp);
1.18 markus 1185: if (bp->buf == NULL)
1186: bp->buf = xmalloc(size);
1187: else
1.138 djm 1188: bp->buf = xrealloc(bp->buf, 1, size);
1.81 markus 1189: memset(bp->buf, 0, size);
1.1 deraadt 1190: bp->cnt = size;
1191: return (bp);
1192: }
1193:
1194: void
1.104 djm 1195: lostconn(int signo)
1.1 deraadt 1196: {
1197: if (!iamremote)
1.74 markus 1198: write(STDERR_FILENO, "lost connection\n", 16);
1199: if (signo)
1200: _exit(1);
1201: else
1202: exit(1);
1.4 aaron 1203: }
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