Annotation of src/usr.bin/ssh/scp.c, Revision 1.132
1.1 deraadt 1: /*
1.38 deraadt 2: * scp - secure remote copy. This is basically patched BSD rcp which
3: * uses ssh to do the data transfer (instead of using rcmd).
1.27 markus 4: *
1.38 deraadt 5: * NOTE: This version should NOT be suid root. (This uses ssh to
6: * do the transfer and ssh has the necessary privileges.)
1.27 markus 7: *
1.38 deraadt 8: * 1995 Timo Rinne <tri@iki.fi>, Tatu Ylonen <ylo@cs.hut.fi>
9: *
10: * As far as I am concerned, the code I have written for this software
11: * can be used freely for any purpose. Any derived versions of this
12: * software must be clearly marked as such, and if the derived work is
13: * incompatible with the protocol description in the RFC file, it must be
14: * called by a name other than "ssh" or "Secure Shell".
1.39 markus 15: */
1.38 deraadt 16: /*
1.60 deraadt 17: * Copyright (c) 1999 Theo de Raadt. All rights reserved.
18: * Copyright (c) 1999 Aaron Campbell. All rights reserved.
1.27 markus 19: *
1.38 deraadt 20: * Redistribution and use in source and binary forms, with or without
21: * modification, are permitted provided that the following conditions
22: * are met:
23: * 1. Redistributions of source code must retain the above copyright
24: * notice, this list of conditions and the following disclaimer.
25: * 2. Redistributions in binary form must reproduce the above copyright
26: * notice, this list of conditions and the following disclaimer in the
27: * documentation and/or other materials provided with the distribution.
1.27 markus 28: *
1.38 deraadt 29: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
30: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
31: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
32: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
33: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
34: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
38: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39: */
1.1 deraadt 40:
41: /*
1.35 deraadt 42: * Parts from:
43: *
1.1 deraadt 44: * Copyright (c) 1983, 1990, 1992, 1993, 1995
45: * The Regents of the University of California. All rights reserved.
46: *
47: * Redistribution and use in source and binary forms, with or without
48: * modification, are permitted provided that the following conditions
49: * are met:
50: * 1. Redistributions of source code must retain the above copyright
51: * notice, this list of conditions and the following disclaimer.
52: * 2. Redistributions in binary form must reproduce the above copyright
53: * notice, this list of conditions and the following disclaimer in the
54: * documentation and/or other materials provided with the distribution.
1.103 millert 55: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 56: * may be used to endorse or promote products derived from this software
57: * without specific prior written permission.
58: *
59: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
60: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
61: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
62: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
63: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
64: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
65: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
66: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
67: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
68: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
69: * SUCH DAMAGE.
70: *
71: */
72:
73: #include "includes.h"
1.132 ! stevesk 74: RCSID("$OpenBSD: scp.c,v 1.131 2006/02/08 23:51:24 stevesk Exp $");
! 75:
! 76: #include <sys/types.h>
! 77: #include <sys/wait.h>
1.131 stevesk 78:
79: #include <dirent.h>
1.1 deraadt 80:
81: #include "xmalloc.h"
1.51 markus 82: #include "atomicio.h"
1.50 markus 83: #include "pathnames.h"
1.51 markus 84: #include "log.h"
1.69 mouring 85: #include "misc.h"
1.97 fgsch 86: #include "progressmeter.h"
1.1 deraadt 87:
1.35 deraadt 88: int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout, int argc);
1.11 aaron 89:
1.99 markus 90: void bwlimit(int);
91:
1.70 mouring 92: /* Struct for addargs */
93: arglist args;
1.41 markus 94:
1.99 markus 95: /* Bandwidth limit */
1.113 djm 96: off_t limit_rate = 0;
1.99 markus 97:
1.11 aaron 98: /* Name of current file being transferred. */
99: char *curfile;
1.4 aaron 100:
1.1 deraadt 101: /* This is set to non-zero to enable verbose mode. */
1.17 markus 102: int verbose_mode = 0;
1.1 deraadt 103:
1.6 aaron 104: /* This is set to zero if the progressmeter is not desired. */
105: int showprogress = 1;
106:
1.34 deraadt 107: /* This is the program to execute for the secured connection. ("ssh" or -S) */
1.50 markus 108: char *ssh_program = _PATH_SSH_PROGRAM;
1.34 deraadt 109:
1.92 markus 110: /* This is used to store the pid of ssh_program */
1.105 djm 111: pid_t do_cmd_pid = -1;
112:
113: static void
114: killchild(int signo)
115: {
1.119 dtucker 116: if (do_cmd_pid > 1) {
1.123 avsm 117: kill(do_cmd_pid, signo ? signo : SIGTERM);
1.119 dtucker 118: waitpid(do_cmd_pid, NULL, 0);
119: }
1.105 djm 120:
1.123 avsm 121: if (signo)
122: _exit(1);
123: exit(1);
1.105 djm 124: }
1.92 markus 125:
1.129 djm 126: static int
127: do_local_cmd(arglist *a)
128: {
129: u_int i;
130: int status;
131: pid_t pid;
132:
133: if (a->num == 0)
134: fatal("do_local_cmd: no arguments");
135:
136: if (verbose_mode) {
137: fprintf(stderr, "Executing:");
138: for (i = 0; i < a->num; i++)
139: fprintf(stderr, " %s", a->list[i]);
140: fprintf(stderr, "\n");
141: }
142: if ((pid = fork()) == -1)
143: fatal("do_local_cmd: fork: %s", strerror(errno));
144:
145: if (pid == 0) {
146: execvp(a->list[0], a->list);
147: perror(a->list[0]);
148: exit(1);
149: }
150:
151: do_cmd_pid = pid;
152: signal(SIGTERM, killchild);
153: signal(SIGINT, killchild);
154: signal(SIGHUP, killchild);
155:
156: while (waitpid(pid, &status, 0) == -1)
157: if (errno != EINTR)
158: fatal("do_local_cmd: waitpid: %s", strerror(errno));
159:
160: do_cmd_pid = -1;
161:
162: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
163: return (-1);
164:
165: return (0);
166: }
167:
1.20 markus 168: /*
169: * This function executes the given command as the specified user on the
170: * given host. This returns < 0 if execution fails, and >= 0 otherwise. This
171: * assigns the input and output file descriptors on success.
172: */
1.1 deraadt 173:
1.27 markus 174: int
1.35 deraadt 175: do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout, int argc)
1.1 deraadt 176: {
1.18 markus 177: int pin[2], pout[2], reserved[2];
178:
179: if (verbose_mode)
1.78 deraadt 180: fprintf(stderr,
181: "Executing: program %s host %s, user %s, command %s\n",
182: ssh_program, host,
183: remuser ? remuser : "(unspecified)", cmd);
1.18 markus 184:
1.20 markus 185: /*
186: * Reserve two descriptors so that the real pipes won't get
187: * descriptors 0 and 1 because that will screw up dup2 below.
188: */
1.18 markus 189: pipe(reserved);
190:
191: /* Create a socket pair for communicating with ssh. */
192: if (pipe(pin) < 0)
193: fatal("pipe: %s", strerror(errno));
194: if (pipe(pout) < 0)
195: fatal("pipe: %s", strerror(errno));
196:
197: /* Free the reserved descriptors. */
198: close(reserved[0]);
199: close(reserved[1]);
200:
1.106 nino 201: /* Fork a child to execute the command on the remote host using ssh. */
1.92 markus 202: do_cmd_pid = fork();
203: if (do_cmd_pid == 0) {
1.18 markus 204: /* Child. */
205: close(pin[1]);
206: close(pout[0]);
207: dup2(pin[0], 0);
208: dup2(pout[1], 1);
209: close(pin[0]);
210: close(pout[1]);
211:
1.129 djm 212: replacearg(&args, 0, "%s", ssh_program);
1.41 markus 213: if (remuser != NULL)
1.70 mouring 214: addargs(&args, "-l%s", remuser);
215: addargs(&args, "%s", host);
216: addargs(&args, "%s", cmd);
1.18 markus 217:
1.41 markus 218: execvp(ssh_program, args.list);
1.34 deraadt 219: perror(ssh_program);
1.18 markus 220: exit(1);
1.92 markus 221: } else if (do_cmd_pid == -1) {
222: fatal("fork: %s", strerror(errno));
1.18 markus 223: }
224: /* Parent. Close the other side, and return the local side. */
225: close(pin[0]);
226: *fdout = pin[1];
227: close(pout[1]);
228: *fdin = pout[0];
1.105 djm 229: signal(SIGTERM, killchild);
230: signal(SIGINT, killchild);
231: signal(SIGHUP, killchild);
1.18 markus 232: return 0;
1.1 deraadt 233: }
234:
235: typedef struct {
1.124 djm 236: size_t cnt;
1.1 deraadt 237: char *buf;
238: } BUF;
239:
1.18 markus 240: BUF *allocbuf(BUF *, int, int);
241: void lostconn(int);
242: void nospace(void);
243: int okname(char *);
244: void run_err(const char *,...);
245: void verifydir(char *);
1.1 deraadt 246:
247: struct passwd *pwd;
1.18 markus 248: uid_t userid;
1.1 deraadt 249: int errs, remin, remout;
250: int pflag, iamremote, iamrecursive, targetshouldbedirectory;
251:
252: #define CMDNEEDS 64
253: char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
254:
1.18 markus 255: int response(void);
256: void rsource(char *, struct stat *);
257: void sink(int, char *[]);
258: void source(int, char *[]);
259: void tolocal(int, char *[]);
260: void toremote(char *, int, char *[]);
261: void usage(void);
1.1 deraadt 262:
263: int
1.104 djm 264: main(int argc, char **argv)
1.1 deraadt 265: {
1.92 markus 266: int ch, fflag, tflag, status;
1.99 markus 267: double speed;
268: char *targ, *endp;
1.1 deraadt 269: extern char *optarg;
270: extern int optind;
1.126 djm 271:
272: /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
273: sanitise_stdfd();
1.1 deraadt 274:
1.129 djm 275: memset(&args, '\0', sizeof(args));
1.41 markus 276: args.list = NULL;
1.129 djm 277: addargs(&args, "%s", ssh_program);
1.70 mouring 278: addargs(&args, "-x");
1.82 stevesk 279: addargs(&args, "-oForwardAgent no");
1.128 reyk 280: addargs(&args, "-oPermitLocalCommand no");
1.84 stevesk 281: addargs(&args, "-oClearAllForwardings yes");
1.41 markus 282:
1.1 deraadt 283: fflag = tflag = 0;
1.100 markus 284: while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q1246S:o:F:")) != -1)
1.18 markus 285: switch (ch) {
286: /* User-visible flags. */
1.100 markus 287: case '1':
288: case '2':
1.23 markus 289: case '4':
1.41 markus 290: case '6':
291: case 'C':
1.70 mouring 292: addargs(&args, "-%c", ch);
1.41 markus 293: break;
294: case 'o':
295: case 'c':
296: case 'i':
1.83 stevesk 297: case 'F':
1.70 mouring 298: addargs(&args, "-%c%s", ch, optarg);
1.23 markus 299: break;
1.41 markus 300: case 'P':
1.70 mouring 301: addargs(&args, "-p%s", optarg);
1.41 markus 302: break;
303: case 'B':
1.70 mouring 304: addargs(&args, "-oBatchmode yes");
1.23 markus 305: break;
1.99 markus 306: case 'l':
307: speed = strtod(optarg, &endp);
308: if (speed <= 0 || *endp != '\0')
309: usage();
1.113 djm 310: limit_rate = speed * 1024;
1.99 markus 311: break;
1.1 deraadt 312: case 'p':
313: pflag = 1;
314: break;
315: case 'r':
316: iamrecursive = 1;
317: break;
1.34 deraadt 318: case 'S':
1.41 markus 319: ssh_program = xstrdup(optarg);
320: break;
321: case 'v':
1.72 markus 322: addargs(&args, "-v");
1.41 markus 323: verbose_mode = 1;
324: break;
325: case 'q':
1.111 dtucker 326: addargs(&args, "-q");
1.41 markus 327: showprogress = 0;
1.34 deraadt 328: break;
329:
1.18 markus 330: /* Server options. */
1.1 deraadt 331: case 'd':
332: targetshouldbedirectory = 1;
333: break;
1.18 markus 334: case 'f': /* "from" */
1.1 deraadt 335: iamremote = 1;
336: fflag = 1;
337: break;
1.18 markus 338: case 't': /* "to" */
1.1 deraadt 339: iamremote = 1;
340: tflag = 1;
341: break;
342: default:
343: usage();
344: }
345: argc -= optind;
346: argv += optind;
347:
348: if ((pwd = getpwuid(userid = getuid())) == NULL)
1.108 deraadt 349: fatal("unknown user %u", (u_int) userid);
1.1 deraadt 350:
1.18 markus 351: if (!isatty(STDERR_FILENO))
1.7 deraadt 352: showprogress = 0;
353:
1.1 deraadt 354: remin = STDIN_FILENO;
355: remout = STDOUT_FILENO;
356:
1.52 stevesk 357: if (fflag) {
1.18 markus 358: /* Follow "protocol", send data. */
359: (void) response();
1.1 deraadt 360: source(argc, argv);
361: exit(errs != 0);
362: }
1.18 markus 363: if (tflag) {
364: /* Receive data. */
1.1 deraadt 365: sink(argc, argv);
366: exit(errs != 0);
367: }
368: if (argc < 2)
369: usage();
370: if (argc > 2)
371: targetshouldbedirectory = 1;
372:
373: remin = remout = -1;
1.92 markus 374: do_cmd_pid = -1;
1.1 deraadt 375: /* Command to be executed on remote system using "ssh". */
1.55 deraadt 376: (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
377: verbose_mode ? " -v" : "",
1.35 deraadt 378: iamrecursive ? " -r" : "", pflag ? " -p" : "",
379: targetshouldbedirectory ? " -d" : "");
1.1 deraadt 380:
1.18 markus 381: (void) signal(SIGPIPE, lostconn);
1.1 deraadt 382:
383: if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */
384: toremote(targ, argc, argv);
385: else {
386: if (targetshouldbedirectory)
387: verifydir(argv[argc - 1]);
1.130 djm 388: tolocal(argc, argv); /* Dest is local host. */
1.92 markus 389: }
390: /*
391: * Finally check the exit status of the ssh process, if one was forked
392: * and no error has occured yet
393: */
394: if (do_cmd_pid != -1 && errs == 0) {
395: if (remin != -1)
396: (void) close(remin);
397: if (remout != -1)
398: (void) close(remout);
399: if (waitpid(do_cmd_pid, &status, 0) == -1)
400: errs = 1;
401: else {
402: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
403: errs = 1;
404: }
1.1 deraadt 405: }
406: exit(errs != 0);
407: }
408:
409: void
1.104 djm 410: toremote(char *targ, int argc, char **argv)
1.1 deraadt 411: {
412: int i, len;
1.120 deraadt 413: char *bp, *host, *src, *suser, *thost, *tuser, *arg;
1.129 djm 414: arglist alist;
415:
416: memset(&alist, '\0', sizeof(alist));
417: alist.list = NULL;
1.1 deraadt 418:
419: *targ++ = 0;
420: if (*targ == 0)
421: targ = ".";
422:
1.121 djm 423: arg = xstrdup(argv[argc - 1]);
1.120 deraadt 424: if ((thost = strrchr(arg, '@'))) {
1.1 deraadt 425: /* user@host */
426: *thost++ = 0;
1.120 deraadt 427: tuser = arg;
1.1 deraadt 428: if (*tuser == '\0')
429: tuser = NULL;
430: } else {
1.120 deraadt 431: thost = arg;
1.1 deraadt 432: tuser = NULL;
433: }
434:
1.129 djm 435: if (tuser != NULL && !okname(tuser)) {
436: xfree(arg);
437: return;
438: }
439:
1.1 deraadt 440: for (i = 0; i < argc - 1; i++) {
441: src = colon(argv[i]);
1.18 markus 442: if (src) { /* remote to remote */
1.129 djm 443: freeargs(&alist);
444: addargs(&alist, "%s", ssh_program);
445: if (verbose_mode)
446: addargs(&alist, "-v");
447: addargs(&alist, "-x");
448: addargs(&alist, "-oClearAllForwardings yes");
449: addargs(&alist, "-n");
450:
1.1 deraadt 451: *src++ = 0;
452: if (*src == 0)
453: src = ".";
1.94 markus 454: host = strrchr(argv[i], '@');
1.129 djm 455:
1.1 deraadt 456: if (host) {
457: *host++ = 0;
1.23 markus 458: host = cleanhostname(host);
1.1 deraadt 459: suser = argv[i];
460: if (*suser == '\0')
461: suser = pwd->pw_name;
1.129 djm 462: else if (!okname(suser))
1.101 markus 463: continue;
1.129 djm 464: addargs(&alist, "-l");
465: addargs(&alist, "%s", suser);
1.23 markus 466: } else {
467: host = cleanhostname(argv[i]);
468: }
1.129 djm 469: addargs(&alist, "%s", host);
470: addargs(&alist, "%s", cmd);
471: addargs(&alist, "%s", src);
472: addargs(&alist, "%s%s%s:%s",
473: tuser ? tuser : "", tuser ? "@" : "",
474: thost, targ);
475: if (do_local_cmd(&alist) != 0)
1.109 markus 476: errs = 1;
1.18 markus 477: } else { /* local to remote */
1.1 deraadt 478: if (remin == -1) {
479: len = strlen(targ) + CMDNEEDS + 20;
1.18 markus 480: bp = xmalloc(len);
1.55 deraadt 481: (void) snprintf(bp, len, "%s -t %s", cmd, targ);
1.23 markus 482: host = cleanhostname(thost);
1.35 deraadt 483: if (do_cmd(host, tuser, bp, &remin,
484: &remout, argc) < 0)
1.18 markus 485: exit(1);
1.1 deraadt 486: if (response() < 0)
487: exit(1);
1.18 markus 488: (void) xfree(bp);
1.1 deraadt 489: }
1.18 markus 490: source(1, argv + i);
1.1 deraadt 491: }
492: }
493: }
494:
495: void
1.104 djm 496: tolocal(int argc, char **argv)
1.1 deraadt 497: {
498: int i, len;
499: char *bp, *host, *src, *suser;
1.129 djm 500: arglist alist;
501:
502: memset(&alist, '\0', sizeof(alist));
503: alist.list = NULL;
1.1 deraadt 504:
505: for (i = 0; i < argc - 1; i++) {
1.18 markus 506: if (!(src = colon(argv[i]))) { /* Local to local. */
1.129 djm 507: freeargs(&alist);
508: addargs(&alist, "%s", _PATH_CP);
509: if (iamrecursive)
510: addargs(&alist, "-r");
511: if (pflag)
512: addargs(&alist, "-p");
513: addargs(&alist, "%s", argv[i]);
514: addargs(&alist, "%s", argv[argc-1]);
515: if (do_local_cmd(&alist))
1.1 deraadt 516: ++errs;
517: continue;
518: }
519: *src++ = 0;
520: if (*src == 0)
521: src = ".";
1.94 markus 522: if ((host = strrchr(argv[i], '@')) == NULL) {
1.1 deraadt 523: host = argv[i];
524: suser = NULL;
525: } else {
526: *host++ = 0;
527: suser = argv[i];
528: if (*suser == '\0')
529: suser = pwd->pw_name;
530: }
1.23 markus 531: host = cleanhostname(host);
1.1 deraadt 532: len = strlen(src) + CMDNEEDS + 20;
1.18 markus 533: bp = xmalloc(len);
1.55 deraadt 534: (void) snprintf(bp, len, "%s -f %s", cmd, src);
1.35 deraadt 535: if (do_cmd(host, suser, bp, &remin, &remout, argc) < 0) {
1.18 markus 536: (void) xfree(bp);
537: ++errs;
538: continue;
1.1 deraadt 539: }
1.18 markus 540: xfree(bp);
1.1 deraadt 541: sink(1, argv + argc - 1);
1.18 markus 542: (void) close(remin);
1.1 deraadt 543: remin = remout = -1;
544: }
545: }
546:
547: void
1.104 djm 548: source(int argc, char **argv)
1.1 deraadt 549: {
550: struct stat stb;
551: static BUF buffer;
552: BUF *bp;
1.122 avsm 553: off_t i, amt, statbytes;
554: size_t result;
1.125 dtucker 555: int fd = -1, haderr, indx;
1.1 deraadt 556: char *last, *name, buf[2048];
1.65 deraadt 557: int len;
1.1 deraadt 558:
559: for (indx = 0; indx < argc; ++indx) {
1.18 markus 560: name = argv[indx];
1.11 aaron 561: statbytes = 0;
1.65 deraadt 562: len = strlen(name);
563: while (len > 1 && name[len-1] == '/')
564: name[--len] = '\0';
1.85 markus 565: if (strchr(name, '\n') != NULL) {
566: run_err("%s: skipping, filename contains a newline",
567: name);
568: goto next;
569: }
1.1 deraadt 570: if ((fd = open(name, O_RDONLY, 0)) < 0)
571: goto syserr;
572: if (fstat(fd, &stb) < 0) {
573: syserr: run_err("%s: %s", name, strerror(errno));
574: goto next;
575: }
576: switch (stb.st_mode & S_IFMT) {
577: case S_IFREG:
578: break;
579: case S_IFDIR:
580: if (iamrecursive) {
581: rsource(name, &stb);
582: goto next;
583: }
584: /* FALLTHROUGH */
585: default:
586: run_err("%s: not a regular file", name);
587: goto next;
588: }
589: if ((last = strrchr(name, '/')) == NULL)
590: last = name;
591: else
592: ++last;
1.11 aaron 593: curfile = last;
1.1 deraadt 594: if (pflag) {
595: /*
596: * Make it compatible with possible future
597: * versions expecting microseconds.
598: */
1.55 deraadt 599: (void) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n",
1.47 markus 600: (u_long) stb.st_mtime,
601: (u_long) stb.st_atime);
1.107 deraadt 602: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 603: if (response() < 0)
604: goto next;
605: }
606: #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
1.61 markus 607: snprintf(buf, sizeof buf, "C%04o %lld %s\n",
1.47 markus 608: (u_int) (stb.st_mode & FILEMODEMASK),
1.62 markus 609: (long long)stb.st_size, last);
1.18 markus 610: if (verbose_mode) {
611: fprintf(stderr, "Sending file modes: %s", buf);
612: }
1.107 deraadt 613: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 614: if (response() < 0)
615: goto next;
616: if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) {
1.127 deraadt 617: next: if (fd != -1) {
618: (void) close(fd);
619: fd = -1;
620: }
1.1 deraadt 621: continue;
622: }
1.97 fgsch 623: if (showprogress)
624: start_progress_meter(curfile, stb.st_size, &statbytes);
1.1 deraadt 625: /* Keep writing after an error so that we stay sync'd up. */
626: for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
627: amt = bp->cnt;
628: if (i + amt > stb.st_size)
629: amt = stb.st_size - i;
630: if (!haderr) {
1.30 deraadt 631: result = atomicio(read, fd, bp->buf, amt);
1.1 deraadt 632: if (result != amt)
1.122 avsm 633: haderr = errno;
1.1 deraadt 634: }
635: if (haderr)
1.107 deraadt 636: (void) atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 637: else {
1.107 deraadt 638: result = atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 639: if (result != amt)
1.122 avsm 640: haderr = errno;
1.4 aaron 641: statbytes += result;
1.1 deraadt 642: }
1.113 djm 643: if (limit_rate)
1.99 markus 644: bwlimit(amt);
1.1 deraadt 645: }
1.18 markus 646: if (showprogress)
1.97 fgsch 647: stop_progress_meter();
1.4 aaron 648:
1.127 deraadt 649: if (fd != -1) {
650: if (close(fd) < 0 && !haderr)
651: haderr = errno;
652: fd = -1;
653: }
1.1 deraadt 654: if (!haderr)
1.107 deraadt 655: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 656: else
657: run_err("%s: %s", name, strerror(haderr));
1.18 markus 658: (void) response();
1.1 deraadt 659: }
660: }
661:
662: void
1.104 djm 663: rsource(char *name, struct stat *statp)
1.1 deraadt 664: {
665: DIR *dirp;
666: struct dirent *dp;
667: char *last, *vect[1], path[1100];
668:
669: if (!(dirp = opendir(name))) {
670: run_err("%s: %s", name, strerror(errno));
671: return;
672: }
673: last = strrchr(name, '/');
674: if (last == 0)
675: last = name;
676: else
677: last++;
678: if (pflag) {
1.55 deraadt 679: (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n",
1.47 markus 680: (u_long) statp->st_mtime,
681: (u_long) statp->st_atime);
1.107 deraadt 682: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 683: if (response() < 0) {
684: closedir(dirp);
685: return;
686: }
687: }
1.55 deraadt 688: (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n",
1.47 markus 689: (u_int) (statp->st_mode & FILEMODEMASK), 0, last);
1.18 markus 690: if (verbose_mode)
691: fprintf(stderr, "Entering directory: %s", path);
1.107 deraadt 692: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 693: if (response() < 0) {
694: closedir(dirp);
695: return;
696: }
1.63 stevesk 697: while ((dp = readdir(dirp)) != NULL) {
1.1 deraadt 698: if (dp->d_ino == 0)
699: continue;
700: if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
701: continue;
702: if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) {
703: run_err("%s/%s: name too long", name, dp->d_name);
704: continue;
705: }
1.55 deraadt 706: (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name);
1.1 deraadt 707: vect[0] = path;
708: source(1, vect);
709: }
1.18 markus 710: (void) closedir(dirp);
1.107 deraadt 711: (void) atomicio(vwrite, remout, "E\n", 2);
1.18 markus 712: (void) response();
1.1 deraadt 713: }
714:
715: void
1.99 markus 716: bwlimit(int amount)
717: {
718: static struct timeval bwstart, bwend;
719: static int lamt, thresh = 16384;
1.115 avsm 720: u_int64_t waitlen;
1.99 markus 721: struct timespec ts, rm;
722:
723: if (!timerisset(&bwstart)) {
724: gettimeofday(&bwstart, NULL);
725: return;
726: }
727:
728: lamt += amount;
729: if (lamt < thresh)
730: return;
731:
732: gettimeofday(&bwend, NULL);
733: timersub(&bwend, &bwstart, &bwend);
734: if (!timerisset(&bwend))
735: return;
736:
737: lamt *= 8;
1.115 avsm 738: waitlen = (double)1000000L * lamt / limit_rate;
1.99 markus 739:
1.115 avsm 740: bwstart.tv_sec = waitlen / 1000000L;
741: bwstart.tv_usec = waitlen % 1000000L;
1.99 markus 742:
743: if (timercmp(&bwstart, &bwend, >)) {
744: timersub(&bwstart, &bwend, &bwend);
745:
746: /* Adjust the wait time */
747: if (bwend.tv_sec) {
748: thresh /= 2;
749: if (thresh < 2048)
750: thresh = 2048;
751: } else if (bwend.tv_usec < 100) {
752: thresh *= 2;
753: if (thresh > 32768)
754: thresh = 32768;
755: }
756:
757: TIMEVAL_TO_TIMESPEC(&bwend, &ts);
758: while (nanosleep(&ts, &rm) == -1) {
759: if (errno != EINTR)
760: break;
761: ts = rm;
762: }
763: }
764:
765: lamt = 0;
766: gettimeofday(&bwstart, NULL);
767: }
768:
769: void
1.104 djm 770: sink(int argc, char **argv)
1.1 deraadt 771: {
772: static BUF buffer;
773: struct stat stb;
1.18 markus 774: enum {
775: YES, NO, DISPLAYED
776: } wrerr;
1.1 deraadt 777: BUF *bp;
1.122 avsm 778: off_t i;
1.124 djm 779: size_t j, count;
780: int amt, exists, first, mask, mode, ofd, omode;
1.97 fgsch 781: off_t size, statbytes;
1.36 deraadt 782: int setimes, targisdir, wrerrno = 0;
1.1 deraadt 783: char ch, *cp, *np, *targ, *why, *vect[1], buf[2048];
1.40 markus 784: struct timeval tv[2];
1.1 deraadt 785:
1.66 stevesk 786: #define atime tv[0]
787: #define mtime tv[1]
1.118 deraadt 788: #define SCREWUP(str) { why = str; goto screwup; }
1.1 deraadt 789:
790: setimes = targisdir = 0;
791: mask = umask(0);
792: if (!pflag)
1.18 markus 793: (void) umask(mask);
1.1 deraadt 794: if (argc != 1) {
795: run_err("ambiguous target");
796: exit(1);
797: }
798: targ = *argv;
799: if (targetshouldbedirectory)
800: verifydir(targ);
1.18 markus 801:
1.107 deraadt 802: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 803: if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
804: targisdir = 1;
805: for (first = 1;; first = 0) {
806: cp = buf;
1.122 avsm 807: if (atomicio(read, remin, cp, 1) != 1)
1.1 deraadt 808: return;
809: if (*cp++ == '\n')
810: SCREWUP("unexpected <newline>");
811: do {
1.30 deraadt 812: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 813: SCREWUP("lost connection");
814: *cp++ = ch;
815: } while (cp < &buf[sizeof(buf) - 1] && ch != '\n');
816: *cp = 0;
1.114 markus 817: if (verbose_mode)
818: fprintf(stderr, "Sink: %s", buf);
1.1 deraadt 819:
820: if (buf[0] == '\01' || buf[0] == '\02') {
821: if (iamremote == 0)
1.107 deraadt 822: (void) atomicio(vwrite, STDERR_FILENO,
1.44 deraadt 823: buf + 1, strlen(buf + 1));
1.1 deraadt 824: if (buf[0] == '\02')
825: exit(1);
826: ++errs;
827: continue;
828: }
829: if (buf[0] == 'E') {
1.107 deraadt 830: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 831: return;
832: }
833: if (ch == '\n')
834: *--cp = 0;
835:
836: cp = buf;
837: if (*cp == 'T') {
838: setimes++;
839: cp++;
1.66 stevesk 840: mtime.tv_sec = strtol(cp, &cp, 10);
841: if (!cp || *cp++ != ' ')
1.1 deraadt 842: SCREWUP("mtime.sec not delimited");
1.66 stevesk 843: mtime.tv_usec = strtol(cp, &cp, 10);
844: if (!cp || *cp++ != ' ')
1.1 deraadt 845: SCREWUP("mtime.usec not delimited");
1.66 stevesk 846: atime.tv_sec = strtol(cp, &cp, 10);
847: if (!cp || *cp++ != ' ')
1.1 deraadt 848: SCREWUP("atime.sec not delimited");
1.66 stevesk 849: atime.tv_usec = strtol(cp, &cp, 10);
850: if (!cp || *cp++ != '\0')
1.1 deraadt 851: SCREWUP("atime.usec not delimited");
1.107 deraadt 852: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 853: continue;
854: }
855: if (*cp != 'C' && *cp != 'D') {
856: /*
857: * Check for the case "rcp remote:foo\* local:bar".
858: * In this case, the line "No match." can be returned
859: * by the shell before the rcp command on the remote is
860: * executed so the ^Aerror_message convention isn't
861: * followed.
862: */
863: if (first) {
864: run_err("%s", cp);
865: exit(1);
866: }
867: SCREWUP("expected control record");
868: }
869: mode = 0;
870: for (++cp; cp < buf + 5; cp++) {
871: if (*cp < '0' || *cp > '7')
872: SCREWUP("bad mode");
873: mode = (mode << 3) | (*cp - '0');
874: }
875: if (*cp++ != ' ')
876: SCREWUP("mode not delimited");
877:
1.63 stevesk 878: for (size = 0; isdigit(*cp);)
1.1 deraadt 879: size = size * 10 + (*cp++ - '0');
880: if (*cp++ != ' ')
881: SCREWUP("size not delimited");
1.114 markus 882: if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) {
883: run_err("error: unexpected filename: %s", cp);
884: exit(1);
885: }
1.1 deraadt 886: if (targisdir) {
887: static char *namebuf;
1.124 djm 888: static size_t cursize;
1.1 deraadt 889: size_t need;
890:
891: need = strlen(targ) + strlen(cp) + 250;
1.55 deraadt 892: if (need > cursize) {
1.58 danh 893: if (namebuf)
894: xfree(namebuf);
1.18 markus 895: namebuf = xmalloc(need);
1.55 deraadt 896: cursize = need;
897: }
898: (void) snprintf(namebuf, need, "%s%s%s", targ,
1.88 mouring 899: strcmp(targ, "/") ? "/" : "", cp);
1.1 deraadt 900: np = namebuf;
901: } else
902: np = targ;
1.12 aaron 903: curfile = cp;
1.1 deraadt 904: exists = stat(np, &stb) == 0;
905: if (buf[0] == 'D') {
906: int mod_flag = pflag;
1.114 markus 907: if (!iamrecursive)
908: SCREWUP("received directory without -r");
1.1 deraadt 909: if (exists) {
910: if (!S_ISDIR(stb.st_mode)) {
911: errno = ENOTDIR;
912: goto bad;
913: }
914: if (pflag)
1.18 markus 915: (void) chmod(np, mode);
1.1 deraadt 916: } else {
1.18 markus 917: /* Handle copying from a read-only
918: directory */
1.1 deraadt 919: mod_flag = 1;
920: if (mkdir(np, mode | S_IRWXU) < 0)
921: goto bad;
922: }
1.58 danh 923: vect[0] = xstrdup(np);
1.1 deraadt 924: sink(1, vect);
925: if (setimes) {
926: setimes = 0;
1.59 deraadt 927: if (utimes(vect[0], tv) < 0)
1.18 markus 928: run_err("%s: set times: %s",
1.59 deraadt 929: vect[0], strerror(errno));
1.1 deraadt 930: }
931: if (mod_flag)
1.59 deraadt 932: (void) chmod(vect[0], mode);
933: if (vect[0])
934: xfree(vect[0]);
1.1 deraadt 935: continue;
936: }
937: omode = mode;
938: mode |= S_IWRITE;
1.71 markus 939: if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
1.1 deraadt 940: bad: run_err("%s: %s", np, strerror(errno));
941: continue;
942: }
1.107 deraadt 943: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 944: if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) {
1.18 markus 945: (void) close(ofd);
1.1 deraadt 946: continue;
947: }
948: cp = bp->buf;
949: wrerr = NO;
1.7 deraadt 950:
1.12 aaron 951: statbytes = 0;
1.97 fgsch 952: if (showprogress)
953: start_progress_meter(curfile, size, &statbytes);
1.1 deraadt 954: for (count = i = 0; i < size; i += 4096) {
955: amt = 4096;
956: if (i + amt > size)
957: amt = size - i;
958: count += amt;
959: do {
1.117 avsm 960: j = atomicio(read, remin, cp, amt);
1.122 avsm 961: if (j == 0) {
1.1 deraadt 962: run_err("%s", j ? strerror(errno) :
1.63 stevesk 963: "dropped connection");
1.1 deraadt 964: exit(1);
965: }
966: amt -= j;
967: cp += j;
1.18 markus 968: statbytes += j;
1.1 deraadt 969: } while (amt > 0);
1.112 djm 970:
1.113 djm 971: if (limit_rate)
1.99 markus 972: bwlimit(4096);
973:
1.1 deraadt 974: if (count == bp->cnt) {
975: /* Keep reading so we stay sync'd up. */
976: if (wrerr == NO) {
1.122 avsm 977: if (atomicio(vwrite, ofd, bp->buf,
978: count) != count) {
1.1 deraadt 979: wrerr = YES;
1.122 avsm 980: wrerrno = errno;
1.1 deraadt 981: }
982: }
983: count = 0;
984: cp = bp->buf;
985: }
986: }
1.7 deraadt 987: if (showprogress)
1.97 fgsch 988: stop_progress_meter();
1.1 deraadt 989: if (count != 0 && wrerr == NO &&
1.122 avsm 990: atomicio(vwrite, ofd, bp->buf, count) != count) {
1.1 deraadt 991: wrerr = YES;
1.122 avsm 992: wrerrno = errno;
1.1 deraadt 993: }
1.98 djm 994: if (wrerr == NO && ftruncate(ofd, size) != 0) {
1.1 deraadt 995: run_err("%s: truncate: %s", np, strerror(errno));
996: wrerr = DISPLAYED;
997: }
998: if (pflag) {
999: if (exists || omode != mode)
1.116 dtucker 1000: if (fchmod(ofd, omode)) {
1.1 deraadt 1001: run_err("%s: set mode: %s",
1.63 stevesk 1002: np, strerror(errno));
1.116 dtucker 1003: wrerr = DISPLAYED;
1004: }
1.1 deraadt 1005: } else {
1006: if (!exists && omode != mode)
1.116 dtucker 1007: if (fchmod(ofd, omode & ~mask)) {
1.1 deraadt 1008: run_err("%s: set mode: %s",
1.63 stevesk 1009: np, strerror(errno));
1.116 dtucker 1010: wrerr = DISPLAYED;
1011: }
1.1 deraadt 1012: }
1.33 provos 1013: if (close(ofd) == -1) {
1014: wrerr = YES;
1015: wrerrno = errno;
1016: }
1.18 markus 1017: (void) response();
1.1 deraadt 1018: if (setimes && wrerr == NO) {
1019: setimes = 0;
1.40 markus 1020: if (utimes(np, tv) < 0) {
1.1 deraadt 1021: run_err("%s: set times: %s",
1.63 stevesk 1022: np, strerror(errno));
1.1 deraadt 1023: wrerr = DISPLAYED;
1024: }
1025: }
1.18 markus 1026: switch (wrerr) {
1.1 deraadt 1027: case YES:
1028: run_err("%s: %s", np, strerror(wrerrno));
1029: break;
1030: case NO:
1.107 deraadt 1031: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 1032: break;
1033: case DISPLAYED:
1034: break;
1035: }
1036: }
1037: screwup:
1038: run_err("protocol error: %s", why);
1039: exit(1);
1040: }
1041:
1042: int
1.86 itojun 1043: response(void)
1.1 deraadt 1044: {
1045: char ch, *cp, resp, rbuf[2048];
1046:
1.30 deraadt 1047: if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp))
1.1 deraadt 1048: lostconn(0);
1049:
1050: cp = rbuf;
1.18 markus 1051: switch (resp) {
1052: case 0: /* ok */
1.1 deraadt 1053: return (0);
1054: default:
1055: *cp++ = resp;
1056: /* FALLTHROUGH */
1.18 markus 1057: case 1: /* error, followed by error msg */
1058: case 2: /* fatal error, "" */
1.1 deraadt 1059: do {
1.30 deraadt 1060: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 1061: lostconn(0);
1062: *cp++ = ch;
1063: } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
1064:
1065: if (!iamremote)
1.107 deraadt 1066: (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf);
1.1 deraadt 1067: ++errs;
1068: if (resp == 1)
1069: return (-1);
1070: exit(1);
1071: }
1072: /* NOTREACHED */
1073: }
1074:
1075: void
1.86 itojun 1076: usage(void)
1.1 deraadt 1077: {
1.83 stevesk 1078: (void) fprintf(stderr,
1.110 jmc 1079: "usage: scp [-1246BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n"
1080: " [-l limit] [-o ssh_option] [-P port] [-S program]\n"
1.90 deraadt 1081: " [[user@]host1:]file1 [...] [[user@]host2:]file2\n");
1.1 deraadt 1082: exit(1);
1083: }
1084:
1085: void
1.18 markus 1086: run_err(const char *fmt,...)
1.1 deraadt 1087: {
1088: static FILE *fp;
1089: va_list ap;
1090:
1091: ++errs;
1092: if (fp == NULL && !(fp = fdopen(remout, "w")))
1093: return;
1.18 markus 1094: (void) fprintf(fp, "%c", 0x01);
1095: (void) fprintf(fp, "scp: ");
1.73 markus 1096: va_start(ap, fmt);
1.18 markus 1097: (void) vfprintf(fp, fmt, ap);
1.73 markus 1098: va_end(ap);
1.18 markus 1099: (void) fprintf(fp, "\n");
1100: (void) fflush(fp);
1101:
1102: if (!iamremote) {
1.73 markus 1103: va_start(ap, fmt);
1.18 markus 1104: vfprintf(stderr, fmt, ap);
1.73 markus 1105: va_end(ap);
1.18 markus 1106: fprintf(stderr, "\n");
1107: }
1.1 deraadt 1108: }
1109:
1110: void
1.104 djm 1111: verifydir(char *cp)
1.1 deraadt 1112: {
1113: struct stat stb;
1114:
1115: if (!stat(cp, &stb)) {
1116: if (S_ISDIR(stb.st_mode))
1117: return;
1118: errno = ENOTDIR;
1119: }
1120: run_err("%s: %s", cp, strerror(errno));
1.123 avsm 1121: killchild(0);
1.1 deraadt 1122: }
1123:
1124: int
1.104 djm 1125: okname(char *cp0)
1.1 deraadt 1126: {
1127: int c;
1128: char *cp;
1129:
1130: cp = cp0;
1131: do {
1.75 deraadt 1132: c = (int)*cp;
1.1 deraadt 1133: if (c & 0200)
1134: goto bad;
1.101 markus 1135: if (!isalpha(c) && !isdigit(c)) {
1136: switch (c) {
1137: case '\'':
1138: case '"':
1139: case '`':
1140: case ' ':
1141: case '#':
1142: goto bad;
1143: default:
1144: break;
1145: }
1146: }
1.1 deraadt 1147: } while (*++cp);
1148: return (1);
1149:
1.25 markus 1150: bad: fprintf(stderr, "%s: invalid user name\n", cp0);
1.1 deraadt 1151: return (0);
1152: }
1153:
1154: BUF *
1.104 djm 1155: allocbuf(BUF *bp, int fd, int blksize)
1.1 deraadt 1156: {
1157: size_t size;
1158: struct stat stb;
1159:
1160: if (fstat(fd, &stb) < 0) {
1161: run_err("fstat: %s", strerror(errno));
1162: return (0);
1163: }
1.95 markus 1164: size = roundup(stb.st_blksize, blksize);
1165: if (size == 0)
1.18 markus 1166: size = blksize;
1.1 deraadt 1167: if (bp->cnt >= size)
1168: return (bp);
1.18 markus 1169: if (bp->buf == NULL)
1170: bp->buf = xmalloc(size);
1171: else
1172: bp->buf = xrealloc(bp->buf, size);
1.81 markus 1173: memset(bp->buf, 0, size);
1.1 deraadt 1174: bp->cnt = size;
1175: return (bp);
1176: }
1177:
1178: void
1.104 djm 1179: lostconn(int signo)
1.1 deraadt 1180: {
1181: if (!iamremote)
1.74 markus 1182: write(STDERR_FILENO, "lost connection\n", 16);
1183: if (signo)
1184: _exit(1);
1185: else
1186: exit(1);
1.4 aaron 1187: }
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