Annotation of src/usr.bin/ssh/scp.c, Revision 1.151
1.151 ! stevesk 1: /* $OpenBSD: scp.c,v 1.150 2006/07/22 20:48:23 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>
1.131 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>
1.150 stevesk 88: #include <string.h>
1.149 stevesk 89: #include <time.h>
1.148 stevesk 90: #include <unistd.h>
1.1 deraadt 91:
92: #include "xmalloc.h"
1.51 markus 93: #include "atomicio.h"
1.50 markus 94: #include "pathnames.h"
1.51 markus 95: #include "log.h"
1.69 mouring 96: #include "misc.h"
1.97 fgsch 97: #include "progressmeter.h"
1.1 deraadt 98:
1.140 deraadt 99: int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout);
1.11 aaron 100:
1.99 markus 101: void bwlimit(int);
102:
1.70 mouring 103: /* Struct for addargs */
104: arglist args;
1.41 markus 105:
1.99 markus 106: /* Bandwidth limit */
1.113 djm 107: off_t limit_rate = 0;
1.99 markus 108:
1.11 aaron 109: /* Name of current file being transferred. */
110: char *curfile;
1.4 aaron 111:
1.1 deraadt 112: /* This is set to non-zero to enable verbose mode. */
1.17 markus 113: int verbose_mode = 0;
1.1 deraadt 114:
1.6 aaron 115: /* This is set to zero if the progressmeter is not desired. */
116: int showprogress = 1;
117:
1.34 deraadt 118: /* This is the program to execute for the secured connection. ("ssh" or -S) */
1.50 markus 119: char *ssh_program = _PATH_SSH_PROGRAM;
1.34 deraadt 120:
1.92 markus 121: /* This is used to store the pid of ssh_program */
1.105 djm 122: pid_t do_cmd_pid = -1;
123:
124: static void
125: killchild(int signo)
126: {
1.119 dtucker 127: if (do_cmd_pid > 1) {
1.123 avsm 128: kill(do_cmd_pid, signo ? signo : SIGTERM);
1.119 dtucker 129: waitpid(do_cmd_pid, NULL, 0);
130: }
1.105 djm 131:
1.123 avsm 132: if (signo)
133: _exit(1);
134: exit(1);
1.105 djm 135: }
1.92 markus 136:
1.129 djm 137: static int
138: do_local_cmd(arglist *a)
139: {
140: u_int i;
141: int status;
142: pid_t pid;
143:
144: if (a->num == 0)
145: fatal("do_local_cmd: no arguments");
146:
147: if (verbose_mode) {
148: fprintf(stderr, "Executing:");
149: for (i = 0; i < a->num; i++)
150: fprintf(stderr, " %s", a->list[i]);
151: fprintf(stderr, "\n");
152: }
153: if ((pid = fork()) == -1)
154: fatal("do_local_cmd: fork: %s", strerror(errno));
155:
156: if (pid == 0) {
157: execvp(a->list[0], a->list);
158: perror(a->list[0]);
159: exit(1);
160: }
161:
162: do_cmd_pid = pid;
163: signal(SIGTERM, killchild);
164: signal(SIGINT, killchild);
165: signal(SIGHUP, killchild);
166:
167: while (waitpid(pid, &status, 0) == -1)
168: if (errno != EINTR)
169: fatal("do_local_cmd: waitpid: %s", strerror(errno));
170:
171: do_cmd_pid = -1;
172:
173: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
174: return (-1);
175:
176: return (0);
177: }
178:
1.20 markus 179: /*
180: * This function executes the given command as the specified user on the
181: * given host. This returns < 0 if execution fails, and >= 0 otherwise. This
182: * assigns the input and output file descriptors on success.
183: */
1.1 deraadt 184:
1.27 markus 185: int
1.140 deraadt 186: do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout)
1.1 deraadt 187: {
1.18 markus 188: int pin[2], pout[2], reserved[2];
189:
190: if (verbose_mode)
1.78 deraadt 191: fprintf(stderr,
192: "Executing: program %s host %s, user %s, command %s\n",
193: ssh_program, host,
194: remuser ? remuser : "(unspecified)", cmd);
1.18 markus 195:
1.20 markus 196: /*
197: * Reserve two descriptors so that the real pipes won't get
198: * descriptors 0 and 1 because that will screw up dup2 below.
199: */
1.142 markus 200: if (pipe(reserved) < 0)
201: fatal("pipe: %s", strerror(errno));
1.18 markus 202:
203: /* Create a socket pair for communicating with ssh. */
204: if (pipe(pin) < 0)
205: fatal("pipe: %s", strerror(errno));
206: if (pipe(pout) < 0)
207: fatal("pipe: %s", strerror(errno));
208:
209: /* Free the reserved descriptors. */
210: close(reserved[0]);
211: close(reserved[1]);
212:
1.106 nino 213: /* Fork a child to execute the command on the remote host using ssh. */
1.92 markus 214: do_cmd_pid = fork();
215: if (do_cmd_pid == 0) {
1.18 markus 216: /* Child. */
217: close(pin[1]);
218: close(pout[0]);
219: dup2(pin[0], 0);
220: dup2(pout[1], 1);
221: close(pin[0]);
222: close(pout[1]);
223:
1.129 djm 224: replacearg(&args, 0, "%s", ssh_program);
1.41 markus 225: if (remuser != NULL)
1.70 mouring 226: addargs(&args, "-l%s", remuser);
227: addargs(&args, "%s", host);
228: addargs(&args, "%s", cmd);
1.18 markus 229:
1.41 markus 230: execvp(ssh_program, args.list);
1.34 deraadt 231: perror(ssh_program);
1.18 markus 232: exit(1);
1.92 markus 233: } else if (do_cmd_pid == -1) {
234: fatal("fork: %s", strerror(errno));
1.18 markus 235: }
236: /* Parent. Close the other side, and return the local side. */
237: close(pin[0]);
238: *fdout = pin[1];
239: close(pout[1]);
240: *fdin = pout[0];
1.105 djm 241: signal(SIGTERM, killchild);
242: signal(SIGINT, killchild);
243: signal(SIGHUP, killchild);
1.18 markus 244: return 0;
1.1 deraadt 245: }
246:
247: typedef struct {
1.124 djm 248: size_t cnt;
1.1 deraadt 249: char *buf;
250: } BUF;
251:
1.18 markus 252: BUF *allocbuf(BUF *, int, int);
253: void lostconn(int);
254: int okname(char *);
255: void run_err(const char *,...);
256: void verifydir(char *);
1.1 deraadt 257:
258: struct passwd *pwd;
1.18 markus 259: uid_t userid;
1.1 deraadt 260: int errs, remin, remout;
261: int pflag, iamremote, iamrecursive, targetshouldbedirectory;
262:
263: #define CMDNEEDS 64
264: char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
265:
1.18 markus 266: int response(void);
267: void rsource(char *, struct stat *);
268: void sink(int, char *[]);
269: void source(int, char *[]);
270: void tolocal(int, char *[]);
271: void toremote(char *, int, char *[]);
272: void usage(void);
1.1 deraadt 273:
274: int
1.104 djm 275: main(int argc, char **argv)
1.1 deraadt 276: {
1.145 djm 277: int ch, fflag, tflag, status, n;
1.99 markus 278: double speed;
1.145 djm 279: char *targ, *endp, **newargv;
1.1 deraadt 280: extern char *optarg;
281: extern int optind;
1.126 djm 282:
283: /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
284: sanitise_stdfd();
1.145 djm 285:
286: /* Copy argv, because we modify it */
287: newargv = xcalloc(MAX(argc + 1, 1), sizeof(*newargv));
288: for (n = 0; n < argc; n++)
289: newargv[n] = xstrdup(argv[n]);
290: argv = newargv;
1.1 deraadt 291:
1.129 djm 292: memset(&args, '\0', sizeof(args));
1.41 markus 293: args.list = NULL;
1.129 djm 294: addargs(&args, "%s", ssh_program);
1.70 mouring 295: addargs(&args, "-x");
1.82 stevesk 296: addargs(&args, "-oForwardAgent no");
1.128 reyk 297: addargs(&args, "-oPermitLocalCommand no");
1.84 stevesk 298: addargs(&args, "-oClearAllForwardings yes");
1.41 markus 299:
1.1 deraadt 300: fflag = tflag = 0;
1.100 markus 301: while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q1246S:o:F:")) != -1)
1.18 markus 302: switch (ch) {
303: /* User-visible flags. */
1.100 markus 304: case '1':
305: case '2':
1.23 markus 306: case '4':
1.41 markus 307: case '6':
308: case 'C':
1.70 mouring 309: addargs(&args, "-%c", ch);
1.41 markus 310: break;
311: case 'o':
312: case 'c':
313: case 'i':
1.83 stevesk 314: case 'F':
1.70 mouring 315: addargs(&args, "-%c%s", ch, optarg);
1.23 markus 316: break;
1.41 markus 317: case 'P':
1.70 mouring 318: addargs(&args, "-p%s", optarg);
1.41 markus 319: break;
320: case 'B':
1.70 mouring 321: addargs(&args, "-oBatchmode yes");
1.23 markus 322: break;
1.99 markus 323: case 'l':
324: speed = strtod(optarg, &endp);
325: if (speed <= 0 || *endp != '\0')
326: usage();
1.113 djm 327: limit_rate = speed * 1024;
1.99 markus 328: break;
1.1 deraadt 329: case 'p':
330: pflag = 1;
331: break;
332: case 'r':
333: iamrecursive = 1;
334: break;
1.34 deraadt 335: case 'S':
1.41 markus 336: ssh_program = xstrdup(optarg);
337: break;
338: case 'v':
1.72 markus 339: addargs(&args, "-v");
1.41 markus 340: verbose_mode = 1;
341: break;
342: case 'q':
1.111 dtucker 343: addargs(&args, "-q");
1.41 markus 344: showprogress = 0;
1.34 deraadt 345: break;
346:
1.18 markus 347: /* Server options. */
1.1 deraadt 348: case 'd':
349: targetshouldbedirectory = 1;
350: break;
1.18 markus 351: case 'f': /* "from" */
1.1 deraadt 352: iamremote = 1;
353: fflag = 1;
354: break;
1.18 markus 355: case 't': /* "to" */
1.1 deraadt 356: iamremote = 1;
357: tflag = 1;
358: break;
359: default:
360: usage();
361: }
362: argc -= optind;
363: argv += optind;
364:
365: if ((pwd = getpwuid(userid = getuid())) == NULL)
1.108 deraadt 366: fatal("unknown user %u", (u_int) userid);
1.1 deraadt 367:
1.18 markus 368: if (!isatty(STDERR_FILENO))
1.7 deraadt 369: showprogress = 0;
370:
1.1 deraadt 371: remin = STDIN_FILENO;
372: remout = STDOUT_FILENO;
373:
1.52 stevesk 374: if (fflag) {
1.18 markus 375: /* Follow "protocol", send data. */
376: (void) response();
1.1 deraadt 377: source(argc, argv);
378: exit(errs != 0);
379: }
1.18 markus 380: if (tflag) {
381: /* Receive data. */
1.1 deraadt 382: sink(argc, argv);
383: exit(errs != 0);
384: }
385: if (argc < 2)
386: usage();
387: if (argc > 2)
388: targetshouldbedirectory = 1;
389:
390: remin = remout = -1;
1.92 markus 391: do_cmd_pid = -1;
1.1 deraadt 392: /* Command to be executed on remote system using "ssh". */
1.55 deraadt 393: (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
394: verbose_mode ? " -v" : "",
1.35 deraadt 395: iamrecursive ? " -r" : "", pflag ? " -p" : "",
396: targetshouldbedirectory ? " -d" : "");
1.1 deraadt 397:
1.18 markus 398: (void) signal(SIGPIPE, lostconn);
1.1 deraadt 399:
400: if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */
401: toremote(targ, argc, argv);
402: else {
403: if (targetshouldbedirectory)
404: verifydir(argv[argc - 1]);
1.130 djm 405: tolocal(argc, argv); /* Dest is local host. */
1.92 markus 406: }
407: /*
408: * Finally check the exit status of the ssh process, if one was forked
409: * and no error has occured yet
410: */
411: if (do_cmd_pid != -1 && errs == 0) {
412: if (remin != -1)
413: (void) close(remin);
414: if (remout != -1)
415: (void) close(remout);
416: if (waitpid(do_cmd_pid, &status, 0) == -1)
417: errs = 1;
418: else {
419: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
420: errs = 1;
421: }
1.1 deraadt 422: }
423: exit(errs != 0);
424: }
425:
426: void
1.104 djm 427: toremote(char *targ, int argc, char **argv)
1.1 deraadt 428: {
1.120 deraadt 429: char *bp, *host, *src, *suser, *thost, *tuser, *arg;
1.129 djm 430: arglist alist;
1.140 deraadt 431: int i;
1.129 djm 432:
433: memset(&alist, '\0', sizeof(alist));
434: alist.list = NULL;
1.1 deraadt 435:
436: *targ++ = 0;
437: if (*targ == 0)
438: targ = ".";
439:
1.121 djm 440: arg = xstrdup(argv[argc - 1]);
1.120 deraadt 441: if ((thost = strrchr(arg, '@'))) {
1.1 deraadt 442: /* user@host */
443: *thost++ = 0;
1.120 deraadt 444: tuser = arg;
1.1 deraadt 445: if (*tuser == '\0')
446: tuser = NULL;
447: } else {
1.120 deraadt 448: thost = arg;
1.1 deraadt 449: tuser = NULL;
450: }
451:
1.129 djm 452: if (tuser != NULL && !okname(tuser)) {
453: xfree(arg);
454: return;
455: }
456:
1.1 deraadt 457: for (i = 0; i < argc - 1; i++) {
458: src = colon(argv[i]);
1.18 markus 459: if (src) { /* remote to remote */
1.129 djm 460: freeargs(&alist);
461: addargs(&alist, "%s", ssh_program);
462: if (verbose_mode)
463: addargs(&alist, "-v");
464: addargs(&alist, "-x");
465: addargs(&alist, "-oClearAllForwardings yes");
466: addargs(&alist, "-n");
467:
1.1 deraadt 468: *src++ = 0;
469: if (*src == 0)
470: src = ".";
1.94 markus 471: host = strrchr(argv[i], '@');
1.129 djm 472:
1.1 deraadt 473: if (host) {
474: *host++ = 0;
1.23 markus 475: host = cleanhostname(host);
1.1 deraadt 476: suser = argv[i];
477: if (*suser == '\0')
478: suser = pwd->pw_name;
1.129 djm 479: else if (!okname(suser))
1.101 markus 480: continue;
1.129 djm 481: addargs(&alist, "-l");
482: addargs(&alist, "%s", suser);
1.23 markus 483: } else {
484: host = cleanhostname(argv[i]);
485: }
1.129 djm 486: addargs(&alist, "%s", host);
487: addargs(&alist, "%s", cmd);
488: addargs(&alist, "%s", src);
489: addargs(&alist, "%s%s%s:%s",
490: tuser ? tuser : "", tuser ? "@" : "",
491: thost, targ);
492: if (do_local_cmd(&alist) != 0)
1.109 markus 493: errs = 1;
1.18 markus 494: } else { /* local to remote */
1.1 deraadt 495: if (remin == -1) {
1.141 djm 496: xasprintf(&bp, "%s -t %s", cmd, targ);
1.23 markus 497: host = cleanhostname(thost);
1.35 deraadt 498: if (do_cmd(host, tuser, bp, &remin,
1.140 deraadt 499: &remout) < 0)
1.18 markus 500: exit(1);
1.1 deraadt 501: if (response() < 0)
502: exit(1);
1.18 markus 503: (void) xfree(bp);
1.1 deraadt 504: }
1.18 markus 505: source(1, argv + i);
1.1 deraadt 506: }
507: }
1.142 markus 508: xfree(arg);
1.1 deraadt 509: }
510:
511: void
1.104 djm 512: tolocal(int argc, char **argv)
1.1 deraadt 513: {
514: char *bp, *host, *src, *suser;
1.129 djm 515: arglist alist;
1.140 deraadt 516: int i;
1.129 djm 517:
518: memset(&alist, '\0', sizeof(alist));
519: alist.list = NULL;
1.1 deraadt 520:
521: for (i = 0; i < argc - 1; i++) {
1.18 markus 522: if (!(src = colon(argv[i]))) { /* Local to local. */
1.129 djm 523: freeargs(&alist);
524: addargs(&alist, "%s", _PATH_CP);
525: if (iamrecursive)
526: addargs(&alist, "-r");
527: if (pflag)
528: addargs(&alist, "-p");
529: addargs(&alist, "%s", argv[i]);
530: addargs(&alist, "%s", argv[argc-1]);
531: if (do_local_cmd(&alist))
1.1 deraadt 532: ++errs;
533: continue;
534: }
535: *src++ = 0;
536: if (*src == 0)
537: src = ".";
1.94 markus 538: if ((host = strrchr(argv[i], '@')) == NULL) {
1.1 deraadt 539: host = argv[i];
540: suser = NULL;
541: } else {
542: *host++ = 0;
543: suser = argv[i];
544: if (*suser == '\0')
545: suser = pwd->pw_name;
546: }
1.23 markus 547: host = cleanhostname(host);
1.141 djm 548: xasprintf(&bp, "%s -f %s", cmd, src);
1.140 deraadt 549: if (do_cmd(host, suser, bp, &remin, &remout) < 0) {
1.18 markus 550: (void) xfree(bp);
551: ++errs;
552: continue;
1.1 deraadt 553: }
1.18 markus 554: xfree(bp);
1.1 deraadt 555: sink(1, argv + argc - 1);
1.18 markus 556: (void) close(remin);
1.1 deraadt 557: remin = remout = -1;
558: }
559: }
560:
561: void
1.104 djm 562: source(int argc, char **argv)
1.1 deraadt 563: {
564: struct stat stb;
565: static BUF buffer;
566: BUF *bp;
1.122 avsm 567: off_t i, amt, statbytes;
568: size_t result;
1.125 dtucker 569: int fd = -1, haderr, indx;
1.1 deraadt 570: char *last, *name, buf[2048];
1.65 deraadt 571: int len;
1.1 deraadt 572:
573: for (indx = 0; indx < argc; ++indx) {
1.18 markus 574: name = argv[indx];
1.11 aaron 575: statbytes = 0;
1.65 deraadt 576: len = strlen(name);
577: while (len > 1 && name[len-1] == '/')
578: name[--len] = '\0';
1.85 markus 579: if (strchr(name, '\n') != NULL) {
580: run_err("%s: skipping, filename contains a newline",
581: name);
582: goto next;
583: }
1.1 deraadt 584: if ((fd = open(name, O_RDONLY, 0)) < 0)
585: goto syserr;
586: if (fstat(fd, &stb) < 0) {
587: syserr: run_err("%s: %s", name, strerror(errno));
588: goto next;
589: }
590: switch (stb.st_mode & S_IFMT) {
591: case S_IFREG:
592: break;
593: case S_IFDIR:
594: if (iamrecursive) {
595: rsource(name, &stb);
596: goto next;
597: }
598: /* FALLTHROUGH */
599: default:
600: run_err("%s: not a regular file", name);
601: goto next;
602: }
603: if ((last = strrchr(name, '/')) == NULL)
604: last = name;
605: else
606: ++last;
1.11 aaron 607: curfile = last;
1.1 deraadt 608: if (pflag) {
609: /*
610: * Make it compatible with possible future
611: * versions expecting microseconds.
612: */
1.55 deraadt 613: (void) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n",
1.47 markus 614: (u_long) stb.st_mtime,
615: (u_long) stb.st_atime);
1.107 deraadt 616: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 617: if (response() < 0)
618: goto next;
619: }
620: #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
1.61 markus 621: snprintf(buf, sizeof buf, "C%04o %lld %s\n",
1.47 markus 622: (u_int) (stb.st_mode & FILEMODEMASK),
1.62 markus 623: (long long)stb.st_size, last);
1.18 markus 624: if (verbose_mode) {
625: fprintf(stderr, "Sending file modes: %s", buf);
626: }
1.107 deraadt 627: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 628: if (response() < 0)
629: goto next;
630: if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) {
1.127 deraadt 631: next: if (fd != -1) {
632: (void) close(fd);
633: fd = -1;
634: }
1.1 deraadt 635: continue;
636: }
1.97 fgsch 637: if (showprogress)
638: start_progress_meter(curfile, stb.st_size, &statbytes);
1.1 deraadt 639: /* Keep writing after an error so that we stay sync'd up. */
640: for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
641: amt = bp->cnt;
642: if (i + amt > stb.st_size)
643: amt = stb.st_size - i;
644: if (!haderr) {
1.30 deraadt 645: result = atomicio(read, fd, bp->buf, amt);
1.1 deraadt 646: if (result != amt)
1.122 avsm 647: haderr = errno;
1.1 deraadt 648: }
649: if (haderr)
1.107 deraadt 650: (void) atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 651: else {
1.107 deraadt 652: result = atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 653: if (result != amt)
1.122 avsm 654: haderr = errno;
1.4 aaron 655: statbytes += result;
1.1 deraadt 656: }
1.113 djm 657: if (limit_rate)
1.99 markus 658: bwlimit(amt);
1.1 deraadt 659: }
1.18 markus 660: if (showprogress)
1.97 fgsch 661: stop_progress_meter();
1.4 aaron 662:
1.127 deraadt 663: if (fd != -1) {
664: if (close(fd) < 0 && !haderr)
665: haderr = errno;
666: fd = -1;
667: }
1.1 deraadt 668: if (!haderr)
1.107 deraadt 669: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 670: else
671: run_err("%s: %s", name, strerror(haderr));
1.18 markus 672: (void) response();
1.1 deraadt 673: }
674: }
675:
676: void
1.104 djm 677: rsource(char *name, struct stat *statp)
1.1 deraadt 678: {
679: DIR *dirp;
680: struct dirent *dp;
681: char *last, *vect[1], path[1100];
682:
683: if (!(dirp = opendir(name))) {
684: run_err("%s: %s", name, strerror(errno));
685: return;
686: }
687: last = strrchr(name, '/');
688: if (last == 0)
689: last = name;
690: else
691: last++;
692: if (pflag) {
1.55 deraadt 693: (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n",
1.47 markus 694: (u_long) statp->st_mtime,
695: (u_long) statp->st_atime);
1.107 deraadt 696: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 697: if (response() < 0) {
698: closedir(dirp);
699: return;
700: }
701: }
1.55 deraadt 702: (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n",
1.47 markus 703: (u_int) (statp->st_mode & FILEMODEMASK), 0, last);
1.18 markus 704: if (verbose_mode)
705: fprintf(stderr, "Entering directory: %s", path);
1.107 deraadt 706: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 707: if (response() < 0) {
708: closedir(dirp);
709: return;
710: }
1.63 stevesk 711: while ((dp = readdir(dirp)) != NULL) {
1.1 deraadt 712: if (dp->d_ino == 0)
713: continue;
714: if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
715: continue;
716: if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) {
717: run_err("%s/%s: name too long", name, dp->d_name);
718: continue;
719: }
1.55 deraadt 720: (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name);
1.1 deraadt 721: vect[0] = path;
722: source(1, vect);
723: }
1.18 markus 724: (void) closedir(dirp);
1.107 deraadt 725: (void) atomicio(vwrite, remout, "E\n", 2);
1.18 markus 726: (void) response();
1.1 deraadt 727: }
728:
729: void
1.99 markus 730: bwlimit(int amount)
731: {
732: static struct timeval bwstart, bwend;
733: static int lamt, thresh = 16384;
1.115 avsm 734: u_int64_t waitlen;
1.99 markus 735: struct timespec ts, rm;
736:
737: if (!timerisset(&bwstart)) {
738: gettimeofday(&bwstart, NULL);
739: return;
740: }
741:
742: lamt += amount;
743: if (lamt < thresh)
744: return;
745:
746: gettimeofday(&bwend, NULL);
747: timersub(&bwend, &bwstart, &bwend);
748: if (!timerisset(&bwend))
749: return;
750:
751: lamt *= 8;
1.115 avsm 752: waitlen = (double)1000000L * lamt / limit_rate;
1.99 markus 753:
1.115 avsm 754: bwstart.tv_sec = waitlen / 1000000L;
755: bwstart.tv_usec = waitlen % 1000000L;
1.99 markus 756:
757: if (timercmp(&bwstart, &bwend, >)) {
758: timersub(&bwstart, &bwend, &bwend);
759:
760: /* Adjust the wait time */
761: if (bwend.tv_sec) {
762: thresh /= 2;
763: if (thresh < 2048)
764: thresh = 2048;
765: } else if (bwend.tv_usec < 100) {
766: thresh *= 2;
767: if (thresh > 32768)
768: thresh = 32768;
769: }
770:
771: TIMEVAL_TO_TIMESPEC(&bwend, &ts);
772: while (nanosleep(&ts, &rm) == -1) {
773: if (errno != EINTR)
774: break;
775: ts = rm;
776: }
777: }
778:
779: lamt = 0;
780: gettimeofday(&bwstart, NULL);
781: }
782:
783: void
1.104 djm 784: sink(int argc, char **argv)
1.1 deraadt 785: {
786: static BUF buffer;
787: struct stat stb;
1.18 markus 788: enum {
789: YES, NO, DISPLAYED
790: } wrerr;
1.1 deraadt 791: BUF *bp;
1.122 avsm 792: off_t i;
1.124 djm 793: size_t j, count;
1.140 deraadt 794: int amt, exists, first, ofd;
795: mode_t mode, omode, mask;
1.97 fgsch 796: off_t size, statbytes;
1.36 deraadt 797: int setimes, targisdir, wrerrno = 0;
1.1 deraadt 798: char ch, *cp, *np, *targ, *why, *vect[1], buf[2048];
1.40 markus 799: struct timeval tv[2];
1.1 deraadt 800:
1.66 stevesk 801: #define atime tv[0]
802: #define mtime tv[1]
1.118 deraadt 803: #define SCREWUP(str) { why = str; goto screwup; }
1.1 deraadt 804:
805: setimes = targisdir = 0;
806: mask = umask(0);
807: if (!pflag)
1.18 markus 808: (void) umask(mask);
1.1 deraadt 809: if (argc != 1) {
810: run_err("ambiguous target");
811: exit(1);
812: }
813: targ = *argv;
814: if (targetshouldbedirectory)
815: verifydir(targ);
1.18 markus 816:
1.107 deraadt 817: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 818: if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
819: targisdir = 1;
820: for (first = 1;; first = 0) {
821: cp = buf;
1.122 avsm 822: if (atomicio(read, remin, cp, 1) != 1)
1.1 deraadt 823: return;
824: if (*cp++ == '\n')
825: SCREWUP("unexpected <newline>");
826: do {
1.30 deraadt 827: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 828: SCREWUP("lost connection");
829: *cp++ = ch;
830: } while (cp < &buf[sizeof(buf) - 1] && ch != '\n');
831: *cp = 0;
1.114 markus 832: if (verbose_mode)
833: fprintf(stderr, "Sink: %s", buf);
1.1 deraadt 834:
835: if (buf[0] == '\01' || buf[0] == '\02') {
836: if (iamremote == 0)
1.107 deraadt 837: (void) atomicio(vwrite, STDERR_FILENO,
1.44 deraadt 838: buf + 1, strlen(buf + 1));
1.1 deraadt 839: if (buf[0] == '\02')
840: exit(1);
841: ++errs;
842: continue;
843: }
844: if (buf[0] == 'E') {
1.107 deraadt 845: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 846: return;
847: }
848: if (ch == '\n')
849: *--cp = 0;
850:
851: cp = buf;
852: if (*cp == 'T') {
853: setimes++;
854: cp++;
1.66 stevesk 855: mtime.tv_sec = strtol(cp, &cp, 10);
856: if (!cp || *cp++ != ' ')
1.1 deraadt 857: SCREWUP("mtime.sec not delimited");
1.66 stevesk 858: mtime.tv_usec = strtol(cp, &cp, 10);
859: if (!cp || *cp++ != ' ')
1.1 deraadt 860: SCREWUP("mtime.usec not delimited");
1.66 stevesk 861: atime.tv_sec = strtol(cp, &cp, 10);
862: if (!cp || *cp++ != ' ')
1.1 deraadt 863: SCREWUP("atime.sec not delimited");
1.66 stevesk 864: atime.tv_usec = strtol(cp, &cp, 10);
865: if (!cp || *cp++ != '\0')
1.1 deraadt 866: SCREWUP("atime.usec not delimited");
1.107 deraadt 867: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 868: continue;
869: }
870: if (*cp != 'C' && *cp != 'D') {
871: /*
872: * Check for the case "rcp remote:foo\* local:bar".
873: * In this case, the line "No match." can be returned
874: * by the shell before the rcp command on the remote is
875: * executed so the ^Aerror_message convention isn't
876: * followed.
877: */
878: if (first) {
879: run_err("%s", cp);
880: exit(1);
881: }
882: SCREWUP("expected control record");
883: }
884: mode = 0;
885: for (++cp; cp < buf + 5; cp++) {
886: if (*cp < '0' || *cp > '7')
887: SCREWUP("bad mode");
888: mode = (mode << 3) | (*cp - '0');
889: }
890: if (*cp++ != ' ')
891: SCREWUP("mode not delimited");
892:
1.63 stevesk 893: for (size = 0; isdigit(*cp);)
1.1 deraadt 894: size = size * 10 + (*cp++ - '0');
895: if (*cp++ != ' ')
896: SCREWUP("size not delimited");
1.114 markus 897: if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) {
898: run_err("error: unexpected filename: %s", cp);
899: exit(1);
900: }
1.1 deraadt 901: if (targisdir) {
902: static char *namebuf;
1.124 djm 903: static size_t cursize;
1.1 deraadt 904: size_t need;
905:
906: need = strlen(targ) + strlen(cp) + 250;
1.55 deraadt 907: if (need > cursize) {
1.58 danh 908: if (namebuf)
909: xfree(namebuf);
1.18 markus 910: namebuf = xmalloc(need);
1.55 deraadt 911: cursize = need;
912: }
913: (void) snprintf(namebuf, need, "%s%s%s", targ,
1.88 mouring 914: strcmp(targ, "/") ? "/" : "", cp);
1.1 deraadt 915: np = namebuf;
916: } else
917: np = targ;
1.12 aaron 918: curfile = cp;
1.1 deraadt 919: exists = stat(np, &stb) == 0;
920: if (buf[0] == 'D') {
921: int mod_flag = pflag;
1.114 markus 922: if (!iamrecursive)
923: SCREWUP("received directory without -r");
1.1 deraadt 924: if (exists) {
925: if (!S_ISDIR(stb.st_mode)) {
926: errno = ENOTDIR;
927: goto bad;
928: }
929: if (pflag)
1.18 markus 930: (void) chmod(np, mode);
1.1 deraadt 931: } else {
1.18 markus 932: /* Handle copying from a read-only
933: directory */
1.1 deraadt 934: mod_flag = 1;
935: if (mkdir(np, mode | S_IRWXU) < 0)
936: goto bad;
937: }
1.58 danh 938: vect[0] = xstrdup(np);
1.1 deraadt 939: sink(1, vect);
940: if (setimes) {
941: setimes = 0;
1.59 deraadt 942: if (utimes(vect[0], tv) < 0)
1.18 markus 943: run_err("%s: set times: %s",
1.59 deraadt 944: vect[0], strerror(errno));
1.1 deraadt 945: }
946: if (mod_flag)
1.59 deraadt 947: (void) chmod(vect[0], mode);
948: if (vect[0])
949: xfree(vect[0]);
1.1 deraadt 950: continue;
951: }
952: omode = mode;
953: mode |= S_IWRITE;
1.71 markus 954: if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
1.1 deraadt 955: bad: run_err("%s: %s", np, strerror(errno));
956: continue;
957: }
1.107 deraadt 958: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 959: if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) {
1.18 markus 960: (void) close(ofd);
1.1 deraadt 961: continue;
962: }
963: cp = bp->buf;
964: wrerr = NO;
1.7 deraadt 965:
1.12 aaron 966: statbytes = 0;
1.97 fgsch 967: if (showprogress)
968: start_progress_meter(curfile, size, &statbytes);
1.1 deraadt 969: for (count = i = 0; i < size; i += 4096) {
970: amt = 4096;
971: if (i + amt > size)
972: amt = size - i;
973: count += amt;
974: do {
1.117 avsm 975: j = atomicio(read, remin, cp, amt);
1.122 avsm 976: if (j == 0) {
1.1 deraadt 977: run_err("%s", j ? strerror(errno) :
1.63 stevesk 978: "dropped connection");
1.1 deraadt 979: exit(1);
980: }
981: amt -= j;
982: cp += j;
1.18 markus 983: statbytes += j;
1.1 deraadt 984: } while (amt > 0);
1.112 djm 985:
1.113 djm 986: if (limit_rate)
1.99 markus 987: bwlimit(4096);
988:
1.1 deraadt 989: if (count == bp->cnt) {
990: /* Keep reading so we stay sync'd up. */
991: if (wrerr == NO) {
1.122 avsm 992: if (atomicio(vwrite, ofd, bp->buf,
993: count) != count) {
1.1 deraadt 994: wrerr = YES;
1.122 avsm 995: wrerrno = errno;
1.1 deraadt 996: }
997: }
998: count = 0;
999: cp = bp->buf;
1000: }
1001: }
1.7 deraadt 1002: if (showprogress)
1.97 fgsch 1003: stop_progress_meter();
1.1 deraadt 1004: if (count != 0 && wrerr == NO &&
1.122 avsm 1005: atomicio(vwrite, ofd, bp->buf, count) != count) {
1.1 deraadt 1006: wrerr = YES;
1.122 avsm 1007: wrerrno = errno;
1.1 deraadt 1008: }
1.98 djm 1009: if (wrerr == NO && ftruncate(ofd, size) != 0) {
1.1 deraadt 1010: run_err("%s: truncate: %s", np, strerror(errno));
1011: wrerr = DISPLAYED;
1012: }
1013: if (pflag) {
1014: if (exists || omode != mode)
1.116 dtucker 1015: if (fchmod(ofd, omode)) {
1.1 deraadt 1016: run_err("%s: set mode: %s",
1.63 stevesk 1017: np, strerror(errno));
1.116 dtucker 1018: wrerr = DISPLAYED;
1019: }
1.1 deraadt 1020: } else {
1021: if (!exists && omode != mode)
1.116 dtucker 1022: if (fchmod(ofd, omode & ~mask)) {
1.1 deraadt 1023: run_err("%s: set mode: %s",
1.63 stevesk 1024: np, strerror(errno));
1.116 dtucker 1025: wrerr = DISPLAYED;
1026: }
1.1 deraadt 1027: }
1.33 provos 1028: if (close(ofd) == -1) {
1029: wrerr = YES;
1030: wrerrno = errno;
1031: }
1.18 markus 1032: (void) response();
1.1 deraadt 1033: if (setimes && wrerr == NO) {
1034: setimes = 0;
1.40 markus 1035: if (utimes(np, tv) < 0) {
1.1 deraadt 1036: run_err("%s: set times: %s",
1.63 stevesk 1037: np, strerror(errno));
1.1 deraadt 1038: wrerr = DISPLAYED;
1039: }
1040: }
1.18 markus 1041: switch (wrerr) {
1.1 deraadt 1042: case YES:
1043: run_err("%s: %s", np, strerror(wrerrno));
1044: break;
1045: case NO:
1.107 deraadt 1046: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 1047: break;
1048: case DISPLAYED:
1049: break;
1050: }
1051: }
1052: screwup:
1053: run_err("protocol error: %s", why);
1054: exit(1);
1055: }
1056:
1057: int
1.86 itojun 1058: response(void)
1.1 deraadt 1059: {
1060: char ch, *cp, resp, rbuf[2048];
1061:
1.30 deraadt 1062: if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp))
1.1 deraadt 1063: lostconn(0);
1064:
1065: cp = rbuf;
1.18 markus 1066: switch (resp) {
1067: case 0: /* ok */
1.1 deraadt 1068: return (0);
1069: default:
1070: *cp++ = resp;
1071: /* FALLTHROUGH */
1.18 markus 1072: case 1: /* error, followed by error msg */
1073: case 2: /* fatal error, "" */
1.1 deraadt 1074: do {
1.30 deraadt 1075: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 1076: lostconn(0);
1077: *cp++ = ch;
1078: } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
1079:
1080: if (!iamremote)
1.107 deraadt 1081: (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf);
1.1 deraadt 1082: ++errs;
1083: if (resp == 1)
1084: return (-1);
1085: exit(1);
1086: }
1087: /* NOTREACHED */
1088: }
1089:
1090: void
1.86 itojun 1091: usage(void)
1.1 deraadt 1092: {
1.83 stevesk 1093: (void) fprintf(stderr,
1.110 jmc 1094: "usage: scp [-1246BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n"
1095: " [-l limit] [-o ssh_option] [-P port] [-S program]\n"
1.90 deraadt 1096: " [[user@]host1:]file1 [...] [[user@]host2:]file2\n");
1.1 deraadt 1097: exit(1);
1098: }
1099:
1100: void
1.18 markus 1101: run_err(const char *fmt,...)
1.1 deraadt 1102: {
1103: static FILE *fp;
1104: va_list ap;
1105:
1106: ++errs;
1.136 biorn 1107: if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) {
1108: (void) fprintf(fp, "%c", 0x01);
1109: (void) fprintf(fp, "scp: ");
1110: va_start(ap, fmt);
1111: (void) vfprintf(fp, fmt, ap);
1112: va_end(ap);
1113: (void) fprintf(fp, "\n");
1114: (void) fflush(fp);
1115: }
1.18 markus 1116:
1117: if (!iamremote) {
1.73 markus 1118: va_start(ap, fmt);
1.18 markus 1119: vfprintf(stderr, fmt, ap);
1.73 markus 1120: va_end(ap);
1.18 markus 1121: fprintf(stderr, "\n");
1122: }
1.1 deraadt 1123: }
1124:
1125: void
1.104 djm 1126: verifydir(char *cp)
1.1 deraadt 1127: {
1128: struct stat stb;
1129:
1130: if (!stat(cp, &stb)) {
1131: if (S_ISDIR(stb.st_mode))
1132: return;
1133: errno = ENOTDIR;
1134: }
1135: run_err("%s: %s", cp, strerror(errno));
1.123 avsm 1136: killchild(0);
1.1 deraadt 1137: }
1138:
1139: int
1.104 djm 1140: okname(char *cp0)
1.1 deraadt 1141: {
1142: int c;
1143: char *cp;
1144:
1145: cp = cp0;
1146: do {
1.75 deraadt 1147: c = (int)*cp;
1.1 deraadt 1148: if (c & 0200)
1149: goto bad;
1.101 markus 1150: if (!isalpha(c) && !isdigit(c)) {
1151: switch (c) {
1152: case '\'':
1153: case '"':
1154: case '`':
1155: case ' ':
1156: case '#':
1157: goto bad;
1158: default:
1159: break;
1160: }
1161: }
1.1 deraadt 1162: } while (*++cp);
1163: return (1);
1164:
1.25 markus 1165: bad: fprintf(stderr, "%s: invalid user name\n", cp0);
1.1 deraadt 1166: return (0);
1167: }
1168:
1169: BUF *
1.104 djm 1170: allocbuf(BUF *bp, int fd, int blksize)
1.1 deraadt 1171: {
1172: size_t size;
1173: struct stat stb;
1174:
1175: if (fstat(fd, &stb) < 0) {
1176: run_err("fstat: %s", strerror(errno));
1177: return (0);
1178: }
1.95 markus 1179: size = roundup(stb.st_blksize, blksize);
1180: if (size == 0)
1.18 markus 1181: size = blksize;
1.1 deraadt 1182: if (bp->cnt >= size)
1183: return (bp);
1.18 markus 1184: if (bp->buf == NULL)
1185: bp->buf = xmalloc(size);
1186: else
1.138 djm 1187: bp->buf = xrealloc(bp->buf, 1, size);
1.81 markus 1188: memset(bp->buf, 0, size);
1.1 deraadt 1189: bp->cnt = size;
1190: return (bp);
1191: }
1192:
1193: void
1.104 djm 1194: lostconn(int signo)
1.1 deraadt 1195: {
1196: if (!iamremote)
1.74 markus 1197: write(STDERR_FILENO, "lost connection\n", 16);
1198: if (signo)
1199: _exit(1);
1200: else
1201: exit(1);
1.4 aaron 1202: }
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