Annotation of src/usr.bin/ssh/scp.c, Revision 1.145
1.145 ! djm 1: /* $OpenBSD: scp.c,v 1.144 2006/07/09 15:15:10 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>
1.131 stevesk 79:
1.135 stevesk 80: #include <ctype.h>
1.131 stevesk 81: #include <dirent.h>
1.144 stevesk 82: #include <fcntl.h>
1.143 stevesk 83: #include <pwd.h>
1.133 stevesk 84: #include <signal.h>
1.1 deraadt 85:
86: #include "xmalloc.h"
1.51 markus 87: #include "atomicio.h"
1.50 markus 88: #include "pathnames.h"
1.51 markus 89: #include "log.h"
1.69 mouring 90: #include "misc.h"
1.97 fgsch 91: #include "progressmeter.h"
1.1 deraadt 92:
1.140 deraadt 93: int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout);
1.11 aaron 94:
1.99 markus 95: void bwlimit(int);
96:
1.70 mouring 97: /* Struct for addargs */
98: arglist args;
1.41 markus 99:
1.99 markus 100: /* Bandwidth limit */
1.113 djm 101: off_t limit_rate = 0;
1.99 markus 102:
1.11 aaron 103: /* Name of current file being transferred. */
104: char *curfile;
1.4 aaron 105:
1.1 deraadt 106: /* This is set to non-zero to enable verbose mode. */
1.17 markus 107: int verbose_mode = 0;
1.1 deraadt 108:
1.6 aaron 109: /* This is set to zero if the progressmeter is not desired. */
110: int showprogress = 1;
111:
1.34 deraadt 112: /* This is the program to execute for the secured connection. ("ssh" or -S) */
1.50 markus 113: char *ssh_program = _PATH_SSH_PROGRAM;
1.34 deraadt 114:
1.92 markus 115: /* This is used to store the pid of ssh_program */
1.105 djm 116: pid_t do_cmd_pid = -1;
117:
118: static void
119: killchild(int signo)
120: {
1.119 dtucker 121: if (do_cmd_pid > 1) {
1.123 avsm 122: kill(do_cmd_pid, signo ? signo : SIGTERM);
1.119 dtucker 123: waitpid(do_cmd_pid, NULL, 0);
124: }
1.105 djm 125:
1.123 avsm 126: if (signo)
127: _exit(1);
128: exit(1);
1.105 djm 129: }
1.92 markus 130:
1.129 djm 131: static int
132: do_local_cmd(arglist *a)
133: {
134: u_int i;
135: int status;
136: pid_t pid;
137:
138: if (a->num == 0)
139: fatal("do_local_cmd: no arguments");
140:
141: if (verbose_mode) {
142: fprintf(stderr, "Executing:");
143: for (i = 0; i < a->num; i++)
144: fprintf(stderr, " %s", a->list[i]);
145: fprintf(stderr, "\n");
146: }
147: if ((pid = fork()) == -1)
148: fatal("do_local_cmd: fork: %s", strerror(errno));
149:
150: if (pid == 0) {
151: execvp(a->list[0], a->list);
152: perror(a->list[0]);
153: exit(1);
154: }
155:
156: do_cmd_pid = pid;
157: signal(SIGTERM, killchild);
158: signal(SIGINT, killchild);
159: signal(SIGHUP, killchild);
160:
161: while (waitpid(pid, &status, 0) == -1)
162: if (errno != EINTR)
163: fatal("do_local_cmd: waitpid: %s", strerror(errno));
164:
165: do_cmd_pid = -1;
166:
167: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
168: return (-1);
169:
170: return (0);
171: }
172:
1.20 markus 173: /*
174: * This function executes the given command as the specified user on the
175: * given host. This returns < 0 if execution fails, and >= 0 otherwise. This
176: * assigns the input and output file descriptors on success.
177: */
1.1 deraadt 178:
1.27 markus 179: int
1.140 deraadt 180: do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout)
1.1 deraadt 181: {
1.18 markus 182: int pin[2], pout[2], reserved[2];
183:
184: if (verbose_mode)
1.78 deraadt 185: fprintf(stderr,
186: "Executing: program %s host %s, user %s, command %s\n",
187: ssh_program, host,
188: remuser ? remuser : "(unspecified)", cmd);
1.18 markus 189:
1.20 markus 190: /*
191: * Reserve two descriptors so that the real pipes won't get
192: * descriptors 0 and 1 because that will screw up dup2 below.
193: */
1.142 markus 194: if (pipe(reserved) < 0)
195: fatal("pipe: %s", strerror(errno));
1.18 markus 196:
197: /* Create a socket pair for communicating with ssh. */
198: if (pipe(pin) < 0)
199: fatal("pipe: %s", strerror(errno));
200: if (pipe(pout) < 0)
201: fatal("pipe: %s", strerror(errno));
202:
203: /* Free the reserved descriptors. */
204: close(reserved[0]);
205: close(reserved[1]);
206:
1.106 nino 207: /* Fork a child to execute the command on the remote host using ssh. */
1.92 markus 208: do_cmd_pid = fork();
209: if (do_cmd_pid == 0) {
1.18 markus 210: /* Child. */
211: close(pin[1]);
212: close(pout[0]);
213: dup2(pin[0], 0);
214: dup2(pout[1], 1);
215: close(pin[0]);
216: close(pout[1]);
217:
1.129 djm 218: replacearg(&args, 0, "%s", ssh_program);
1.41 markus 219: if (remuser != NULL)
1.70 mouring 220: addargs(&args, "-l%s", remuser);
221: addargs(&args, "%s", host);
222: addargs(&args, "%s", cmd);
1.18 markus 223:
1.41 markus 224: execvp(ssh_program, args.list);
1.34 deraadt 225: perror(ssh_program);
1.18 markus 226: exit(1);
1.92 markus 227: } else if (do_cmd_pid == -1) {
228: fatal("fork: %s", strerror(errno));
1.18 markus 229: }
230: /* Parent. Close the other side, and return the local side. */
231: close(pin[0]);
232: *fdout = pin[1];
233: close(pout[1]);
234: *fdin = pout[0];
1.105 djm 235: signal(SIGTERM, killchild);
236: signal(SIGINT, killchild);
237: signal(SIGHUP, killchild);
1.18 markus 238: return 0;
1.1 deraadt 239: }
240:
241: typedef struct {
1.124 djm 242: size_t cnt;
1.1 deraadt 243: char *buf;
244: } BUF;
245:
1.18 markus 246: BUF *allocbuf(BUF *, int, int);
247: void lostconn(int);
248: int okname(char *);
249: void run_err(const char *,...);
250: void verifydir(char *);
1.1 deraadt 251:
252: struct passwd *pwd;
1.18 markus 253: uid_t userid;
1.1 deraadt 254: int errs, remin, remout;
255: int pflag, iamremote, iamrecursive, targetshouldbedirectory;
256:
257: #define CMDNEEDS 64
258: char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
259:
1.18 markus 260: int response(void);
261: void rsource(char *, struct stat *);
262: void sink(int, char *[]);
263: void source(int, char *[]);
264: void tolocal(int, char *[]);
265: void toremote(char *, int, char *[]);
266: void usage(void);
1.1 deraadt 267:
268: int
1.104 djm 269: main(int argc, char **argv)
1.1 deraadt 270: {
1.145 ! djm 271: int ch, fflag, tflag, status, n;
1.99 markus 272: double speed;
1.145 ! djm 273: char *targ, *endp, **newargv;
1.1 deraadt 274: extern char *optarg;
275: extern int optind;
1.126 djm 276:
277: /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
278: sanitise_stdfd();
1.145 ! djm 279:
! 280: /* Copy argv, because we modify it */
! 281: newargv = xcalloc(MAX(argc + 1, 1), sizeof(*newargv));
! 282: for (n = 0; n < argc; n++)
! 283: newargv[n] = xstrdup(argv[n]);
! 284: argv = newargv;
1.1 deraadt 285:
1.129 djm 286: memset(&args, '\0', sizeof(args));
1.41 markus 287: args.list = NULL;
1.129 djm 288: addargs(&args, "%s", ssh_program);
1.70 mouring 289: addargs(&args, "-x");
1.82 stevesk 290: addargs(&args, "-oForwardAgent no");
1.128 reyk 291: addargs(&args, "-oPermitLocalCommand no");
1.84 stevesk 292: addargs(&args, "-oClearAllForwardings yes");
1.41 markus 293:
1.1 deraadt 294: fflag = tflag = 0;
1.100 markus 295: while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q1246S:o:F:")) != -1)
1.18 markus 296: switch (ch) {
297: /* User-visible flags. */
1.100 markus 298: case '1':
299: case '2':
1.23 markus 300: case '4':
1.41 markus 301: case '6':
302: case 'C':
1.70 mouring 303: addargs(&args, "-%c", ch);
1.41 markus 304: break;
305: case 'o':
306: case 'c':
307: case 'i':
1.83 stevesk 308: case 'F':
1.70 mouring 309: addargs(&args, "-%c%s", ch, optarg);
1.23 markus 310: break;
1.41 markus 311: case 'P':
1.70 mouring 312: addargs(&args, "-p%s", optarg);
1.41 markus 313: break;
314: case 'B':
1.70 mouring 315: addargs(&args, "-oBatchmode yes");
1.23 markus 316: break;
1.99 markus 317: case 'l':
318: speed = strtod(optarg, &endp);
319: if (speed <= 0 || *endp != '\0')
320: usage();
1.113 djm 321: limit_rate = speed * 1024;
1.99 markus 322: break;
1.1 deraadt 323: case 'p':
324: pflag = 1;
325: break;
326: case 'r':
327: iamrecursive = 1;
328: break;
1.34 deraadt 329: case 'S':
1.41 markus 330: ssh_program = xstrdup(optarg);
331: break;
332: case 'v':
1.72 markus 333: addargs(&args, "-v");
1.41 markus 334: verbose_mode = 1;
335: break;
336: case 'q':
1.111 dtucker 337: addargs(&args, "-q");
1.41 markus 338: showprogress = 0;
1.34 deraadt 339: break;
340:
1.18 markus 341: /* Server options. */
1.1 deraadt 342: case 'd':
343: targetshouldbedirectory = 1;
344: break;
1.18 markus 345: case 'f': /* "from" */
1.1 deraadt 346: iamremote = 1;
347: fflag = 1;
348: break;
1.18 markus 349: case 't': /* "to" */
1.1 deraadt 350: iamremote = 1;
351: tflag = 1;
352: break;
353: default:
354: usage();
355: }
356: argc -= optind;
357: argv += optind;
358:
359: if ((pwd = getpwuid(userid = getuid())) == NULL)
1.108 deraadt 360: fatal("unknown user %u", (u_int) userid);
1.1 deraadt 361:
1.18 markus 362: if (!isatty(STDERR_FILENO))
1.7 deraadt 363: showprogress = 0;
364:
1.1 deraadt 365: remin = STDIN_FILENO;
366: remout = STDOUT_FILENO;
367:
1.52 stevesk 368: if (fflag) {
1.18 markus 369: /* Follow "protocol", send data. */
370: (void) response();
1.1 deraadt 371: source(argc, argv);
372: exit(errs != 0);
373: }
1.18 markus 374: if (tflag) {
375: /* Receive data. */
1.1 deraadt 376: sink(argc, argv);
377: exit(errs != 0);
378: }
379: if (argc < 2)
380: usage();
381: if (argc > 2)
382: targetshouldbedirectory = 1;
383:
384: remin = remout = -1;
1.92 markus 385: do_cmd_pid = -1;
1.1 deraadt 386: /* Command to be executed on remote system using "ssh". */
1.55 deraadt 387: (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
388: verbose_mode ? " -v" : "",
1.35 deraadt 389: iamrecursive ? " -r" : "", pflag ? " -p" : "",
390: targetshouldbedirectory ? " -d" : "");
1.1 deraadt 391:
1.18 markus 392: (void) signal(SIGPIPE, lostconn);
1.1 deraadt 393:
394: if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */
395: toremote(targ, argc, argv);
396: else {
397: if (targetshouldbedirectory)
398: verifydir(argv[argc - 1]);
1.130 djm 399: tolocal(argc, argv); /* Dest is local host. */
1.92 markus 400: }
401: /*
402: * Finally check the exit status of the ssh process, if one was forked
403: * and no error has occured yet
404: */
405: if (do_cmd_pid != -1 && errs == 0) {
406: if (remin != -1)
407: (void) close(remin);
408: if (remout != -1)
409: (void) close(remout);
410: if (waitpid(do_cmd_pid, &status, 0) == -1)
411: errs = 1;
412: else {
413: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
414: errs = 1;
415: }
1.1 deraadt 416: }
417: exit(errs != 0);
418: }
419:
420: void
1.104 djm 421: toremote(char *targ, int argc, char **argv)
1.1 deraadt 422: {
1.120 deraadt 423: char *bp, *host, *src, *suser, *thost, *tuser, *arg;
1.129 djm 424: arglist alist;
1.140 deraadt 425: int i;
1.129 djm 426:
427: memset(&alist, '\0', sizeof(alist));
428: alist.list = NULL;
1.1 deraadt 429:
430: *targ++ = 0;
431: if (*targ == 0)
432: targ = ".";
433:
1.121 djm 434: arg = xstrdup(argv[argc - 1]);
1.120 deraadt 435: if ((thost = strrchr(arg, '@'))) {
1.1 deraadt 436: /* user@host */
437: *thost++ = 0;
1.120 deraadt 438: tuser = arg;
1.1 deraadt 439: if (*tuser == '\0')
440: tuser = NULL;
441: } else {
1.120 deraadt 442: thost = arg;
1.1 deraadt 443: tuser = NULL;
444: }
445:
1.129 djm 446: if (tuser != NULL && !okname(tuser)) {
447: xfree(arg);
448: return;
449: }
450:
1.1 deraadt 451: for (i = 0; i < argc - 1; i++) {
452: src = colon(argv[i]);
1.18 markus 453: if (src) { /* remote to remote */
1.129 djm 454: freeargs(&alist);
455: addargs(&alist, "%s", ssh_program);
456: if (verbose_mode)
457: addargs(&alist, "-v");
458: addargs(&alist, "-x");
459: addargs(&alist, "-oClearAllForwardings yes");
460: addargs(&alist, "-n");
461:
1.1 deraadt 462: *src++ = 0;
463: if (*src == 0)
464: src = ".";
1.94 markus 465: host = strrchr(argv[i], '@');
1.129 djm 466:
1.1 deraadt 467: if (host) {
468: *host++ = 0;
1.23 markus 469: host = cleanhostname(host);
1.1 deraadt 470: suser = argv[i];
471: if (*suser == '\0')
472: suser = pwd->pw_name;
1.129 djm 473: else if (!okname(suser))
1.101 markus 474: continue;
1.129 djm 475: addargs(&alist, "-l");
476: addargs(&alist, "%s", suser);
1.23 markus 477: } else {
478: host = cleanhostname(argv[i]);
479: }
1.129 djm 480: addargs(&alist, "%s", host);
481: addargs(&alist, "%s", cmd);
482: addargs(&alist, "%s", src);
483: addargs(&alist, "%s%s%s:%s",
484: tuser ? tuser : "", tuser ? "@" : "",
485: thost, targ);
486: if (do_local_cmd(&alist) != 0)
1.109 markus 487: errs = 1;
1.18 markus 488: } else { /* local to remote */
1.1 deraadt 489: if (remin == -1) {
1.141 djm 490: xasprintf(&bp, "%s -t %s", cmd, targ);
1.23 markus 491: host = cleanhostname(thost);
1.35 deraadt 492: if (do_cmd(host, tuser, bp, &remin,
1.140 deraadt 493: &remout) < 0)
1.18 markus 494: exit(1);
1.1 deraadt 495: if (response() < 0)
496: exit(1);
1.18 markus 497: (void) xfree(bp);
1.1 deraadt 498: }
1.18 markus 499: source(1, argv + i);
1.1 deraadt 500: }
501: }
1.142 markus 502: xfree(arg);
1.1 deraadt 503: }
504:
505: void
1.104 djm 506: tolocal(int argc, char **argv)
1.1 deraadt 507: {
508: char *bp, *host, *src, *suser;
1.129 djm 509: arglist alist;
1.140 deraadt 510: int i;
1.129 djm 511:
512: memset(&alist, '\0', sizeof(alist));
513: alist.list = NULL;
1.1 deraadt 514:
515: for (i = 0; i < argc - 1; i++) {
1.18 markus 516: if (!(src = colon(argv[i]))) { /* Local to local. */
1.129 djm 517: freeargs(&alist);
518: addargs(&alist, "%s", _PATH_CP);
519: if (iamrecursive)
520: addargs(&alist, "-r");
521: if (pflag)
522: addargs(&alist, "-p");
523: addargs(&alist, "%s", argv[i]);
524: addargs(&alist, "%s", argv[argc-1]);
525: if (do_local_cmd(&alist))
1.1 deraadt 526: ++errs;
527: continue;
528: }
529: *src++ = 0;
530: if (*src == 0)
531: src = ".";
1.94 markus 532: if ((host = strrchr(argv[i], '@')) == NULL) {
1.1 deraadt 533: host = argv[i];
534: suser = NULL;
535: } else {
536: *host++ = 0;
537: suser = argv[i];
538: if (*suser == '\0')
539: suser = pwd->pw_name;
540: }
1.23 markus 541: host = cleanhostname(host);
1.141 djm 542: xasprintf(&bp, "%s -f %s", cmd, src);
1.140 deraadt 543: if (do_cmd(host, suser, bp, &remin, &remout) < 0) {
1.18 markus 544: (void) xfree(bp);
545: ++errs;
546: continue;
1.1 deraadt 547: }
1.18 markus 548: xfree(bp);
1.1 deraadt 549: sink(1, argv + argc - 1);
1.18 markus 550: (void) close(remin);
1.1 deraadt 551: remin = remout = -1;
552: }
553: }
554:
555: void
1.104 djm 556: source(int argc, char **argv)
1.1 deraadt 557: {
558: struct stat stb;
559: static BUF buffer;
560: BUF *bp;
1.122 avsm 561: off_t i, amt, statbytes;
562: size_t result;
1.125 dtucker 563: int fd = -1, haderr, indx;
1.1 deraadt 564: char *last, *name, buf[2048];
1.65 deraadt 565: int len;
1.1 deraadt 566:
567: for (indx = 0; indx < argc; ++indx) {
1.18 markus 568: name = argv[indx];
1.11 aaron 569: statbytes = 0;
1.65 deraadt 570: len = strlen(name);
571: while (len > 1 && name[len-1] == '/')
572: name[--len] = '\0';
1.85 markus 573: if (strchr(name, '\n') != NULL) {
574: run_err("%s: skipping, filename contains a newline",
575: name);
576: goto next;
577: }
1.1 deraadt 578: if ((fd = open(name, O_RDONLY, 0)) < 0)
579: goto syserr;
580: if (fstat(fd, &stb) < 0) {
581: syserr: run_err("%s: %s", name, strerror(errno));
582: goto next;
583: }
584: switch (stb.st_mode & S_IFMT) {
585: case S_IFREG:
586: break;
587: case S_IFDIR:
588: if (iamrecursive) {
589: rsource(name, &stb);
590: goto next;
591: }
592: /* FALLTHROUGH */
593: default:
594: run_err("%s: not a regular file", name);
595: goto next;
596: }
597: if ((last = strrchr(name, '/')) == NULL)
598: last = name;
599: else
600: ++last;
1.11 aaron 601: curfile = last;
1.1 deraadt 602: if (pflag) {
603: /*
604: * Make it compatible with possible future
605: * versions expecting microseconds.
606: */
1.55 deraadt 607: (void) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n",
1.47 markus 608: (u_long) stb.st_mtime,
609: (u_long) stb.st_atime);
1.107 deraadt 610: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 611: if (response() < 0)
612: goto next;
613: }
614: #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
1.61 markus 615: snprintf(buf, sizeof buf, "C%04o %lld %s\n",
1.47 markus 616: (u_int) (stb.st_mode & FILEMODEMASK),
1.62 markus 617: (long long)stb.st_size, last);
1.18 markus 618: if (verbose_mode) {
619: fprintf(stderr, "Sending file modes: %s", buf);
620: }
1.107 deraadt 621: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 622: if (response() < 0)
623: goto next;
624: if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) {
1.127 deraadt 625: next: if (fd != -1) {
626: (void) close(fd);
627: fd = -1;
628: }
1.1 deraadt 629: continue;
630: }
1.97 fgsch 631: if (showprogress)
632: start_progress_meter(curfile, stb.st_size, &statbytes);
1.1 deraadt 633: /* Keep writing after an error so that we stay sync'd up. */
634: for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
635: amt = bp->cnt;
636: if (i + amt > stb.st_size)
637: amt = stb.st_size - i;
638: if (!haderr) {
1.30 deraadt 639: result = atomicio(read, fd, bp->buf, amt);
1.1 deraadt 640: if (result != amt)
1.122 avsm 641: haderr = errno;
1.1 deraadt 642: }
643: if (haderr)
1.107 deraadt 644: (void) atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 645: else {
1.107 deraadt 646: result = atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 647: if (result != amt)
1.122 avsm 648: haderr = errno;
1.4 aaron 649: statbytes += result;
1.1 deraadt 650: }
1.113 djm 651: if (limit_rate)
1.99 markus 652: bwlimit(amt);
1.1 deraadt 653: }
1.18 markus 654: if (showprogress)
1.97 fgsch 655: stop_progress_meter();
1.4 aaron 656:
1.127 deraadt 657: if (fd != -1) {
658: if (close(fd) < 0 && !haderr)
659: haderr = errno;
660: fd = -1;
661: }
1.1 deraadt 662: if (!haderr)
1.107 deraadt 663: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 664: else
665: run_err("%s: %s", name, strerror(haderr));
1.18 markus 666: (void) response();
1.1 deraadt 667: }
668: }
669:
670: void
1.104 djm 671: rsource(char *name, struct stat *statp)
1.1 deraadt 672: {
673: DIR *dirp;
674: struct dirent *dp;
675: char *last, *vect[1], path[1100];
676:
677: if (!(dirp = opendir(name))) {
678: run_err("%s: %s", name, strerror(errno));
679: return;
680: }
681: last = strrchr(name, '/');
682: if (last == 0)
683: last = name;
684: else
685: last++;
686: if (pflag) {
1.55 deraadt 687: (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n",
1.47 markus 688: (u_long) statp->st_mtime,
689: (u_long) statp->st_atime);
1.107 deraadt 690: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 691: if (response() < 0) {
692: closedir(dirp);
693: return;
694: }
695: }
1.55 deraadt 696: (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n",
1.47 markus 697: (u_int) (statp->st_mode & FILEMODEMASK), 0, last);
1.18 markus 698: if (verbose_mode)
699: fprintf(stderr, "Entering directory: %s", path);
1.107 deraadt 700: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 701: if (response() < 0) {
702: closedir(dirp);
703: return;
704: }
1.63 stevesk 705: while ((dp = readdir(dirp)) != NULL) {
1.1 deraadt 706: if (dp->d_ino == 0)
707: continue;
708: if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
709: continue;
710: if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) {
711: run_err("%s/%s: name too long", name, dp->d_name);
712: continue;
713: }
1.55 deraadt 714: (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name);
1.1 deraadt 715: vect[0] = path;
716: source(1, vect);
717: }
1.18 markus 718: (void) closedir(dirp);
1.107 deraadt 719: (void) atomicio(vwrite, remout, "E\n", 2);
1.18 markus 720: (void) response();
1.1 deraadt 721: }
722:
723: void
1.99 markus 724: bwlimit(int amount)
725: {
726: static struct timeval bwstart, bwend;
727: static int lamt, thresh = 16384;
1.115 avsm 728: u_int64_t waitlen;
1.99 markus 729: struct timespec ts, rm;
730:
731: if (!timerisset(&bwstart)) {
732: gettimeofday(&bwstart, NULL);
733: return;
734: }
735:
736: lamt += amount;
737: if (lamt < thresh)
738: return;
739:
740: gettimeofday(&bwend, NULL);
741: timersub(&bwend, &bwstart, &bwend);
742: if (!timerisset(&bwend))
743: return;
744:
745: lamt *= 8;
1.115 avsm 746: waitlen = (double)1000000L * lamt / limit_rate;
1.99 markus 747:
1.115 avsm 748: bwstart.tv_sec = waitlen / 1000000L;
749: bwstart.tv_usec = waitlen % 1000000L;
1.99 markus 750:
751: if (timercmp(&bwstart, &bwend, >)) {
752: timersub(&bwstart, &bwend, &bwend);
753:
754: /* Adjust the wait time */
755: if (bwend.tv_sec) {
756: thresh /= 2;
757: if (thresh < 2048)
758: thresh = 2048;
759: } else if (bwend.tv_usec < 100) {
760: thresh *= 2;
761: if (thresh > 32768)
762: thresh = 32768;
763: }
764:
765: TIMEVAL_TO_TIMESPEC(&bwend, &ts);
766: while (nanosleep(&ts, &rm) == -1) {
767: if (errno != EINTR)
768: break;
769: ts = rm;
770: }
771: }
772:
773: lamt = 0;
774: gettimeofday(&bwstart, NULL);
775: }
776:
777: void
1.104 djm 778: sink(int argc, char **argv)
1.1 deraadt 779: {
780: static BUF buffer;
781: struct stat stb;
1.18 markus 782: enum {
783: YES, NO, DISPLAYED
784: } wrerr;
1.1 deraadt 785: BUF *bp;
1.122 avsm 786: off_t i;
1.124 djm 787: size_t j, count;
1.140 deraadt 788: int amt, exists, first, ofd;
789: mode_t mode, omode, mask;
1.97 fgsch 790: off_t size, statbytes;
1.36 deraadt 791: int setimes, targisdir, wrerrno = 0;
1.1 deraadt 792: char ch, *cp, *np, *targ, *why, *vect[1], buf[2048];
1.40 markus 793: struct timeval tv[2];
1.1 deraadt 794:
1.66 stevesk 795: #define atime tv[0]
796: #define mtime tv[1]
1.118 deraadt 797: #define SCREWUP(str) { why = str; goto screwup; }
1.1 deraadt 798:
799: setimes = targisdir = 0;
800: mask = umask(0);
801: if (!pflag)
1.18 markus 802: (void) umask(mask);
1.1 deraadt 803: if (argc != 1) {
804: run_err("ambiguous target");
805: exit(1);
806: }
807: targ = *argv;
808: if (targetshouldbedirectory)
809: verifydir(targ);
1.18 markus 810:
1.107 deraadt 811: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 812: if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
813: targisdir = 1;
814: for (first = 1;; first = 0) {
815: cp = buf;
1.122 avsm 816: if (atomicio(read, remin, cp, 1) != 1)
1.1 deraadt 817: return;
818: if (*cp++ == '\n')
819: SCREWUP("unexpected <newline>");
820: do {
1.30 deraadt 821: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 822: SCREWUP("lost connection");
823: *cp++ = ch;
824: } while (cp < &buf[sizeof(buf) - 1] && ch != '\n');
825: *cp = 0;
1.114 markus 826: if (verbose_mode)
827: fprintf(stderr, "Sink: %s", buf);
1.1 deraadt 828:
829: if (buf[0] == '\01' || buf[0] == '\02') {
830: if (iamremote == 0)
1.107 deraadt 831: (void) atomicio(vwrite, STDERR_FILENO,
1.44 deraadt 832: buf + 1, strlen(buf + 1));
1.1 deraadt 833: if (buf[0] == '\02')
834: exit(1);
835: ++errs;
836: continue;
837: }
838: if (buf[0] == 'E') {
1.107 deraadt 839: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 840: return;
841: }
842: if (ch == '\n')
843: *--cp = 0;
844:
845: cp = buf;
846: if (*cp == 'T') {
847: setimes++;
848: cp++;
1.66 stevesk 849: mtime.tv_sec = strtol(cp, &cp, 10);
850: if (!cp || *cp++ != ' ')
1.1 deraadt 851: SCREWUP("mtime.sec not delimited");
1.66 stevesk 852: mtime.tv_usec = strtol(cp, &cp, 10);
853: if (!cp || *cp++ != ' ')
1.1 deraadt 854: SCREWUP("mtime.usec not delimited");
1.66 stevesk 855: atime.tv_sec = strtol(cp, &cp, 10);
856: if (!cp || *cp++ != ' ')
1.1 deraadt 857: SCREWUP("atime.sec not delimited");
1.66 stevesk 858: atime.tv_usec = strtol(cp, &cp, 10);
859: if (!cp || *cp++ != '\0')
1.1 deraadt 860: SCREWUP("atime.usec not delimited");
1.107 deraadt 861: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 862: continue;
863: }
864: if (*cp != 'C' && *cp != 'D') {
865: /*
866: * Check for the case "rcp remote:foo\* local:bar".
867: * In this case, the line "No match." can be returned
868: * by the shell before the rcp command on the remote is
869: * executed so the ^Aerror_message convention isn't
870: * followed.
871: */
872: if (first) {
873: run_err("%s", cp);
874: exit(1);
875: }
876: SCREWUP("expected control record");
877: }
878: mode = 0;
879: for (++cp; cp < buf + 5; cp++) {
880: if (*cp < '0' || *cp > '7')
881: SCREWUP("bad mode");
882: mode = (mode << 3) | (*cp - '0');
883: }
884: if (*cp++ != ' ')
885: SCREWUP("mode not delimited");
886:
1.63 stevesk 887: for (size = 0; isdigit(*cp);)
1.1 deraadt 888: size = size * 10 + (*cp++ - '0');
889: if (*cp++ != ' ')
890: SCREWUP("size not delimited");
1.114 markus 891: if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) {
892: run_err("error: unexpected filename: %s", cp);
893: exit(1);
894: }
1.1 deraadt 895: if (targisdir) {
896: static char *namebuf;
1.124 djm 897: static size_t cursize;
1.1 deraadt 898: size_t need;
899:
900: need = strlen(targ) + strlen(cp) + 250;
1.55 deraadt 901: if (need > cursize) {
1.58 danh 902: if (namebuf)
903: xfree(namebuf);
1.18 markus 904: namebuf = xmalloc(need);
1.55 deraadt 905: cursize = need;
906: }
907: (void) snprintf(namebuf, need, "%s%s%s", targ,
1.88 mouring 908: strcmp(targ, "/") ? "/" : "", cp);
1.1 deraadt 909: np = namebuf;
910: } else
911: np = targ;
1.12 aaron 912: curfile = cp;
1.1 deraadt 913: exists = stat(np, &stb) == 0;
914: if (buf[0] == 'D') {
915: int mod_flag = pflag;
1.114 markus 916: if (!iamrecursive)
917: SCREWUP("received directory without -r");
1.1 deraadt 918: if (exists) {
919: if (!S_ISDIR(stb.st_mode)) {
920: errno = ENOTDIR;
921: goto bad;
922: }
923: if (pflag)
1.18 markus 924: (void) chmod(np, mode);
1.1 deraadt 925: } else {
1.18 markus 926: /* Handle copying from a read-only
927: directory */
1.1 deraadt 928: mod_flag = 1;
929: if (mkdir(np, mode | S_IRWXU) < 0)
930: goto bad;
931: }
1.58 danh 932: vect[0] = xstrdup(np);
1.1 deraadt 933: sink(1, vect);
934: if (setimes) {
935: setimes = 0;
1.59 deraadt 936: if (utimes(vect[0], tv) < 0)
1.18 markus 937: run_err("%s: set times: %s",
1.59 deraadt 938: vect[0], strerror(errno));
1.1 deraadt 939: }
940: if (mod_flag)
1.59 deraadt 941: (void) chmod(vect[0], mode);
942: if (vect[0])
943: xfree(vect[0]);
1.1 deraadt 944: continue;
945: }
946: omode = mode;
947: mode |= S_IWRITE;
1.71 markus 948: if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
1.1 deraadt 949: bad: run_err("%s: %s", np, strerror(errno));
950: continue;
951: }
1.107 deraadt 952: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 953: if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) {
1.18 markus 954: (void) close(ofd);
1.1 deraadt 955: continue;
956: }
957: cp = bp->buf;
958: wrerr = NO;
1.7 deraadt 959:
1.12 aaron 960: statbytes = 0;
1.97 fgsch 961: if (showprogress)
962: start_progress_meter(curfile, size, &statbytes);
1.1 deraadt 963: for (count = i = 0; i < size; i += 4096) {
964: amt = 4096;
965: if (i + amt > size)
966: amt = size - i;
967: count += amt;
968: do {
1.117 avsm 969: j = atomicio(read, remin, cp, amt);
1.122 avsm 970: if (j == 0) {
1.1 deraadt 971: run_err("%s", j ? strerror(errno) :
1.63 stevesk 972: "dropped connection");
1.1 deraadt 973: exit(1);
974: }
975: amt -= j;
976: cp += j;
1.18 markus 977: statbytes += j;
1.1 deraadt 978: } while (amt > 0);
1.112 djm 979:
1.113 djm 980: if (limit_rate)
1.99 markus 981: bwlimit(4096);
982:
1.1 deraadt 983: if (count == bp->cnt) {
984: /* Keep reading so we stay sync'd up. */
985: if (wrerr == NO) {
1.122 avsm 986: if (atomicio(vwrite, ofd, bp->buf,
987: count) != count) {
1.1 deraadt 988: wrerr = YES;
1.122 avsm 989: wrerrno = errno;
1.1 deraadt 990: }
991: }
992: count = 0;
993: cp = bp->buf;
994: }
995: }
1.7 deraadt 996: if (showprogress)
1.97 fgsch 997: stop_progress_meter();
1.1 deraadt 998: if (count != 0 && wrerr == NO &&
1.122 avsm 999: atomicio(vwrite, ofd, bp->buf, count) != count) {
1.1 deraadt 1000: wrerr = YES;
1.122 avsm 1001: wrerrno = errno;
1.1 deraadt 1002: }
1.98 djm 1003: if (wrerr == NO && ftruncate(ofd, size) != 0) {
1.1 deraadt 1004: run_err("%s: truncate: %s", np, strerror(errno));
1005: wrerr = DISPLAYED;
1006: }
1007: if (pflag) {
1008: if (exists || omode != mode)
1.116 dtucker 1009: if (fchmod(ofd, omode)) {
1.1 deraadt 1010: run_err("%s: set mode: %s",
1.63 stevesk 1011: np, strerror(errno));
1.116 dtucker 1012: wrerr = DISPLAYED;
1013: }
1.1 deraadt 1014: } else {
1015: if (!exists && omode != mode)
1.116 dtucker 1016: if (fchmod(ofd, omode & ~mask)) {
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: }
1.33 provos 1022: if (close(ofd) == -1) {
1023: wrerr = YES;
1024: wrerrno = errno;
1025: }
1.18 markus 1026: (void) response();
1.1 deraadt 1027: if (setimes && wrerr == NO) {
1028: setimes = 0;
1.40 markus 1029: if (utimes(np, tv) < 0) {
1.1 deraadt 1030: run_err("%s: set times: %s",
1.63 stevesk 1031: np, strerror(errno));
1.1 deraadt 1032: wrerr = DISPLAYED;
1033: }
1034: }
1.18 markus 1035: switch (wrerr) {
1.1 deraadt 1036: case YES:
1037: run_err("%s: %s", np, strerror(wrerrno));
1038: break;
1039: case NO:
1.107 deraadt 1040: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 1041: break;
1042: case DISPLAYED:
1043: break;
1044: }
1045: }
1046: screwup:
1047: run_err("protocol error: %s", why);
1048: exit(1);
1049: }
1050:
1051: int
1.86 itojun 1052: response(void)
1.1 deraadt 1053: {
1054: char ch, *cp, resp, rbuf[2048];
1055:
1.30 deraadt 1056: if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp))
1.1 deraadt 1057: lostconn(0);
1058:
1059: cp = rbuf;
1.18 markus 1060: switch (resp) {
1061: case 0: /* ok */
1.1 deraadt 1062: return (0);
1063: default:
1064: *cp++ = resp;
1065: /* FALLTHROUGH */
1.18 markus 1066: case 1: /* error, followed by error msg */
1067: case 2: /* fatal error, "" */
1.1 deraadt 1068: do {
1.30 deraadt 1069: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 1070: lostconn(0);
1071: *cp++ = ch;
1072: } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
1073:
1074: if (!iamremote)
1.107 deraadt 1075: (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf);
1.1 deraadt 1076: ++errs;
1077: if (resp == 1)
1078: return (-1);
1079: exit(1);
1080: }
1081: /* NOTREACHED */
1082: }
1083:
1084: void
1.86 itojun 1085: usage(void)
1.1 deraadt 1086: {
1.83 stevesk 1087: (void) fprintf(stderr,
1.110 jmc 1088: "usage: scp [-1246BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n"
1089: " [-l limit] [-o ssh_option] [-P port] [-S program]\n"
1.90 deraadt 1090: " [[user@]host1:]file1 [...] [[user@]host2:]file2\n");
1.1 deraadt 1091: exit(1);
1092: }
1093:
1094: void
1.18 markus 1095: run_err(const char *fmt,...)
1.1 deraadt 1096: {
1097: static FILE *fp;
1098: va_list ap;
1099:
1100: ++errs;
1.136 biorn 1101: if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) {
1102: (void) fprintf(fp, "%c", 0x01);
1103: (void) fprintf(fp, "scp: ");
1104: va_start(ap, fmt);
1105: (void) vfprintf(fp, fmt, ap);
1106: va_end(ap);
1107: (void) fprintf(fp, "\n");
1108: (void) fflush(fp);
1109: }
1.18 markus 1110:
1111: if (!iamremote) {
1.73 markus 1112: va_start(ap, fmt);
1.18 markus 1113: vfprintf(stderr, fmt, ap);
1.73 markus 1114: va_end(ap);
1.18 markus 1115: fprintf(stderr, "\n");
1116: }
1.1 deraadt 1117: }
1118:
1119: void
1.104 djm 1120: verifydir(char *cp)
1.1 deraadt 1121: {
1122: struct stat stb;
1123:
1124: if (!stat(cp, &stb)) {
1125: if (S_ISDIR(stb.st_mode))
1126: return;
1127: errno = ENOTDIR;
1128: }
1129: run_err("%s: %s", cp, strerror(errno));
1.123 avsm 1130: killchild(0);
1.1 deraadt 1131: }
1132:
1133: int
1.104 djm 1134: okname(char *cp0)
1.1 deraadt 1135: {
1136: int c;
1137: char *cp;
1138:
1139: cp = cp0;
1140: do {
1.75 deraadt 1141: c = (int)*cp;
1.1 deraadt 1142: if (c & 0200)
1143: goto bad;
1.101 markus 1144: if (!isalpha(c) && !isdigit(c)) {
1145: switch (c) {
1146: case '\'':
1147: case '"':
1148: case '`':
1149: case ' ':
1150: case '#':
1151: goto bad;
1152: default:
1153: break;
1154: }
1155: }
1.1 deraadt 1156: } while (*++cp);
1157: return (1);
1158:
1.25 markus 1159: bad: fprintf(stderr, "%s: invalid user name\n", cp0);
1.1 deraadt 1160: return (0);
1161: }
1162:
1163: BUF *
1.104 djm 1164: allocbuf(BUF *bp, int fd, int blksize)
1.1 deraadt 1165: {
1166: size_t size;
1167: struct stat stb;
1168:
1169: if (fstat(fd, &stb) < 0) {
1170: run_err("fstat: %s", strerror(errno));
1171: return (0);
1172: }
1.95 markus 1173: size = roundup(stb.st_blksize, blksize);
1174: if (size == 0)
1.18 markus 1175: size = blksize;
1.1 deraadt 1176: if (bp->cnt >= size)
1177: return (bp);
1.18 markus 1178: if (bp->buf == NULL)
1179: bp->buf = xmalloc(size);
1180: else
1.138 djm 1181: bp->buf = xrealloc(bp->buf, 1, size);
1.81 markus 1182: memset(bp->buf, 0, size);
1.1 deraadt 1183: bp->cnt = size;
1184: return (bp);
1185: }
1186:
1187: void
1.104 djm 1188: lostconn(int signo)
1.1 deraadt 1189: {
1190: if (!iamremote)
1.74 markus 1191: write(STDERR_FILENO, "lost connection\n", 16);
1192: if (signo)
1193: _exit(1);
1194: else
1195: exit(1);
1.4 aaron 1196: }