Annotation of src/usr.bin/ssh/scp.c, Revision 1.150
1.150 ! stevesk 1: /* $OpenBSD: scp.c,v 1.149 2006/07/22 19:08:54 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>
1.147 stevesk 82: #include <errno.h>
1.144 stevesk 83: #include <fcntl.h>
1.143 stevesk 84: #include <pwd.h>
1.133 stevesk 85: #include <signal.h>
1.146 stevesk 86: #include <stdarg.h>
1.150 ! stevesk 87: #include <string.h>
1.149 stevesk 88: #include <time.h>
1.148 stevesk 89: #include <unistd.h>
1.1 deraadt 90:
91: #include "xmalloc.h"
1.51 markus 92: #include "atomicio.h"
1.50 markus 93: #include "pathnames.h"
1.51 markus 94: #include "log.h"
1.69 mouring 95: #include "misc.h"
1.97 fgsch 96: #include "progressmeter.h"
1.1 deraadt 97:
1.140 deraadt 98: int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout);
1.11 aaron 99:
1.99 markus 100: void bwlimit(int);
101:
1.70 mouring 102: /* Struct for addargs */
103: arglist args;
1.41 markus 104:
1.99 markus 105: /* Bandwidth limit */
1.113 djm 106: off_t limit_rate = 0;
1.99 markus 107:
1.11 aaron 108: /* Name of current file being transferred. */
109: char *curfile;
1.4 aaron 110:
1.1 deraadt 111: /* This is set to non-zero to enable verbose mode. */
1.17 markus 112: int verbose_mode = 0;
1.1 deraadt 113:
1.6 aaron 114: /* This is set to zero if the progressmeter is not desired. */
115: int showprogress = 1;
116:
1.34 deraadt 117: /* This is the program to execute for the secured connection. ("ssh" or -S) */
1.50 markus 118: char *ssh_program = _PATH_SSH_PROGRAM;
1.34 deraadt 119:
1.92 markus 120: /* This is used to store the pid of ssh_program */
1.105 djm 121: pid_t do_cmd_pid = -1;
122:
123: static void
124: killchild(int signo)
125: {
1.119 dtucker 126: if (do_cmd_pid > 1) {
1.123 avsm 127: kill(do_cmd_pid, signo ? signo : SIGTERM);
1.119 dtucker 128: waitpid(do_cmd_pid, NULL, 0);
129: }
1.105 djm 130:
1.123 avsm 131: if (signo)
132: _exit(1);
133: exit(1);
1.105 djm 134: }
1.92 markus 135:
1.129 djm 136: static int
137: do_local_cmd(arglist *a)
138: {
139: u_int i;
140: int status;
141: pid_t pid;
142:
143: if (a->num == 0)
144: fatal("do_local_cmd: no arguments");
145:
146: if (verbose_mode) {
147: fprintf(stderr, "Executing:");
148: for (i = 0; i < a->num; i++)
149: fprintf(stderr, " %s", a->list[i]);
150: fprintf(stderr, "\n");
151: }
152: if ((pid = fork()) == -1)
153: fatal("do_local_cmd: fork: %s", strerror(errno));
154:
155: if (pid == 0) {
156: execvp(a->list[0], a->list);
157: perror(a->list[0]);
158: exit(1);
159: }
160:
161: do_cmd_pid = pid;
162: signal(SIGTERM, killchild);
163: signal(SIGINT, killchild);
164: signal(SIGHUP, killchild);
165:
166: while (waitpid(pid, &status, 0) == -1)
167: if (errno != EINTR)
168: fatal("do_local_cmd: waitpid: %s", strerror(errno));
169:
170: do_cmd_pid = -1;
171:
172: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
173: return (-1);
174:
175: return (0);
176: }
177:
1.20 markus 178: /*
179: * This function executes the given command as the specified user on the
180: * given host. This returns < 0 if execution fails, and >= 0 otherwise. This
181: * assigns the input and output file descriptors on success.
182: */
1.1 deraadt 183:
1.27 markus 184: int
1.140 deraadt 185: do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout)
1.1 deraadt 186: {
1.18 markus 187: int pin[2], pout[2], reserved[2];
188:
189: if (verbose_mode)
1.78 deraadt 190: fprintf(stderr,
191: "Executing: program %s host %s, user %s, command %s\n",
192: ssh_program, host,
193: remuser ? remuser : "(unspecified)", cmd);
1.18 markus 194:
1.20 markus 195: /*
196: * Reserve two descriptors so that the real pipes won't get
197: * descriptors 0 and 1 because that will screw up dup2 below.
198: */
1.142 markus 199: if (pipe(reserved) < 0)
200: fatal("pipe: %s", strerror(errno));
1.18 markus 201:
202: /* Create a socket pair for communicating with ssh. */
203: if (pipe(pin) < 0)
204: fatal("pipe: %s", strerror(errno));
205: if (pipe(pout) < 0)
206: fatal("pipe: %s", strerror(errno));
207:
208: /* Free the reserved descriptors. */
209: close(reserved[0]);
210: close(reserved[1]);
211:
1.106 nino 212: /* Fork a child to execute the command on the remote host using ssh. */
1.92 markus 213: do_cmd_pid = fork();
214: if (do_cmd_pid == 0) {
1.18 markus 215: /* Child. */
216: close(pin[1]);
217: close(pout[0]);
218: dup2(pin[0], 0);
219: dup2(pout[1], 1);
220: close(pin[0]);
221: close(pout[1]);
222:
1.129 djm 223: replacearg(&args, 0, "%s", ssh_program);
1.41 markus 224: if (remuser != NULL)
1.70 mouring 225: addargs(&args, "-l%s", remuser);
226: addargs(&args, "%s", host);
227: addargs(&args, "%s", cmd);
1.18 markus 228:
1.41 markus 229: execvp(ssh_program, args.list);
1.34 deraadt 230: perror(ssh_program);
1.18 markus 231: exit(1);
1.92 markus 232: } else if (do_cmd_pid == -1) {
233: fatal("fork: %s", strerror(errno));
1.18 markus 234: }
235: /* Parent. Close the other side, and return the local side. */
236: close(pin[0]);
237: *fdout = pin[1];
238: close(pout[1]);
239: *fdin = pout[0];
1.105 djm 240: signal(SIGTERM, killchild);
241: signal(SIGINT, killchild);
242: signal(SIGHUP, killchild);
1.18 markus 243: return 0;
1.1 deraadt 244: }
245:
246: typedef struct {
1.124 djm 247: size_t cnt;
1.1 deraadt 248: char *buf;
249: } BUF;
250:
1.18 markus 251: BUF *allocbuf(BUF *, int, int);
252: void lostconn(int);
253: int okname(char *);
254: void run_err(const char *,...);
255: void verifydir(char *);
1.1 deraadt 256:
257: struct passwd *pwd;
1.18 markus 258: uid_t userid;
1.1 deraadt 259: int errs, remin, remout;
260: int pflag, iamremote, iamrecursive, targetshouldbedirectory;
261:
262: #define CMDNEEDS 64
263: char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
264:
1.18 markus 265: int response(void);
266: void rsource(char *, struct stat *);
267: void sink(int, char *[]);
268: void source(int, char *[]);
269: void tolocal(int, char *[]);
270: void toremote(char *, int, char *[]);
271: void usage(void);
1.1 deraadt 272:
273: int
1.104 djm 274: main(int argc, char **argv)
1.1 deraadt 275: {
1.145 djm 276: int ch, fflag, tflag, status, n;
1.99 markus 277: double speed;
1.145 djm 278: char *targ, *endp, **newargv;
1.1 deraadt 279: extern char *optarg;
280: extern int optind;
1.126 djm 281:
282: /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
283: sanitise_stdfd();
1.145 djm 284:
285: /* Copy argv, because we modify it */
286: newargv = xcalloc(MAX(argc + 1, 1), sizeof(*newargv));
287: for (n = 0; n < argc; n++)
288: newargv[n] = xstrdup(argv[n]);
289: argv = newargv;
1.1 deraadt 290:
1.129 djm 291: memset(&args, '\0', sizeof(args));
1.41 markus 292: args.list = NULL;
1.129 djm 293: addargs(&args, "%s", ssh_program);
1.70 mouring 294: addargs(&args, "-x");
1.82 stevesk 295: addargs(&args, "-oForwardAgent no");
1.128 reyk 296: addargs(&args, "-oPermitLocalCommand no");
1.84 stevesk 297: addargs(&args, "-oClearAllForwardings yes");
1.41 markus 298:
1.1 deraadt 299: fflag = tflag = 0;
1.100 markus 300: while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q1246S:o:F:")) != -1)
1.18 markus 301: switch (ch) {
302: /* User-visible flags. */
1.100 markus 303: case '1':
304: case '2':
1.23 markus 305: case '4':
1.41 markus 306: case '6':
307: case 'C':
1.70 mouring 308: addargs(&args, "-%c", ch);
1.41 markus 309: break;
310: case 'o':
311: case 'c':
312: case 'i':
1.83 stevesk 313: case 'F':
1.70 mouring 314: addargs(&args, "-%c%s", ch, optarg);
1.23 markus 315: break;
1.41 markus 316: case 'P':
1.70 mouring 317: addargs(&args, "-p%s", optarg);
1.41 markus 318: break;
319: case 'B':
1.70 mouring 320: addargs(&args, "-oBatchmode yes");
1.23 markus 321: break;
1.99 markus 322: case 'l':
323: speed = strtod(optarg, &endp);
324: if (speed <= 0 || *endp != '\0')
325: usage();
1.113 djm 326: limit_rate = speed * 1024;
1.99 markus 327: break;
1.1 deraadt 328: case 'p':
329: pflag = 1;
330: break;
331: case 'r':
332: iamrecursive = 1;
333: break;
1.34 deraadt 334: case 'S':
1.41 markus 335: ssh_program = xstrdup(optarg);
336: break;
337: case 'v':
1.72 markus 338: addargs(&args, "-v");
1.41 markus 339: verbose_mode = 1;
340: break;
341: case 'q':
1.111 dtucker 342: addargs(&args, "-q");
1.41 markus 343: showprogress = 0;
1.34 deraadt 344: break;
345:
1.18 markus 346: /* Server options. */
1.1 deraadt 347: case 'd':
348: targetshouldbedirectory = 1;
349: break;
1.18 markus 350: case 'f': /* "from" */
1.1 deraadt 351: iamremote = 1;
352: fflag = 1;
353: break;
1.18 markus 354: case 't': /* "to" */
1.1 deraadt 355: iamremote = 1;
356: tflag = 1;
357: break;
358: default:
359: usage();
360: }
361: argc -= optind;
362: argv += optind;
363:
364: if ((pwd = getpwuid(userid = getuid())) == NULL)
1.108 deraadt 365: fatal("unknown user %u", (u_int) userid);
1.1 deraadt 366:
1.18 markus 367: if (!isatty(STDERR_FILENO))
1.7 deraadt 368: showprogress = 0;
369:
1.1 deraadt 370: remin = STDIN_FILENO;
371: remout = STDOUT_FILENO;
372:
1.52 stevesk 373: if (fflag) {
1.18 markus 374: /* Follow "protocol", send data. */
375: (void) response();
1.1 deraadt 376: source(argc, argv);
377: exit(errs != 0);
378: }
1.18 markus 379: if (tflag) {
380: /* Receive data. */
1.1 deraadt 381: sink(argc, argv);
382: exit(errs != 0);
383: }
384: if (argc < 2)
385: usage();
386: if (argc > 2)
387: targetshouldbedirectory = 1;
388:
389: remin = remout = -1;
1.92 markus 390: do_cmd_pid = -1;
1.1 deraadt 391: /* Command to be executed on remote system using "ssh". */
1.55 deraadt 392: (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
393: verbose_mode ? " -v" : "",
1.35 deraadt 394: iamrecursive ? " -r" : "", pflag ? " -p" : "",
395: targetshouldbedirectory ? " -d" : "");
1.1 deraadt 396:
1.18 markus 397: (void) signal(SIGPIPE, lostconn);
1.1 deraadt 398:
399: if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */
400: toremote(targ, argc, argv);
401: else {
402: if (targetshouldbedirectory)
403: verifydir(argv[argc - 1]);
1.130 djm 404: tolocal(argc, argv); /* Dest is local host. */
1.92 markus 405: }
406: /*
407: * Finally check the exit status of the ssh process, if one was forked
408: * and no error has occured yet
409: */
410: if (do_cmd_pid != -1 && errs == 0) {
411: if (remin != -1)
412: (void) close(remin);
413: if (remout != -1)
414: (void) close(remout);
415: if (waitpid(do_cmd_pid, &status, 0) == -1)
416: errs = 1;
417: else {
418: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
419: errs = 1;
420: }
1.1 deraadt 421: }
422: exit(errs != 0);
423: }
424:
425: void
1.104 djm 426: toremote(char *targ, int argc, char **argv)
1.1 deraadt 427: {
1.120 deraadt 428: char *bp, *host, *src, *suser, *thost, *tuser, *arg;
1.129 djm 429: arglist alist;
1.140 deraadt 430: int i;
1.129 djm 431:
432: memset(&alist, '\0', sizeof(alist));
433: alist.list = NULL;
1.1 deraadt 434:
435: *targ++ = 0;
436: if (*targ == 0)
437: targ = ".";
438:
1.121 djm 439: arg = xstrdup(argv[argc - 1]);
1.120 deraadt 440: if ((thost = strrchr(arg, '@'))) {
1.1 deraadt 441: /* user@host */
442: *thost++ = 0;
1.120 deraadt 443: tuser = arg;
1.1 deraadt 444: if (*tuser == '\0')
445: tuser = NULL;
446: } else {
1.120 deraadt 447: thost = arg;
1.1 deraadt 448: tuser = NULL;
449: }
450:
1.129 djm 451: if (tuser != NULL && !okname(tuser)) {
452: xfree(arg);
453: return;
454: }
455:
1.1 deraadt 456: for (i = 0; i < argc - 1; i++) {
457: src = colon(argv[i]);
1.18 markus 458: if (src) { /* remote to remote */
1.129 djm 459: freeargs(&alist);
460: addargs(&alist, "%s", ssh_program);
461: if (verbose_mode)
462: addargs(&alist, "-v");
463: addargs(&alist, "-x");
464: addargs(&alist, "-oClearAllForwardings yes");
465: addargs(&alist, "-n");
466:
1.1 deraadt 467: *src++ = 0;
468: if (*src == 0)
469: src = ".";
1.94 markus 470: host = strrchr(argv[i], '@');
1.129 djm 471:
1.1 deraadt 472: if (host) {
473: *host++ = 0;
1.23 markus 474: host = cleanhostname(host);
1.1 deraadt 475: suser = argv[i];
476: if (*suser == '\0')
477: suser = pwd->pw_name;
1.129 djm 478: else if (!okname(suser))
1.101 markus 479: continue;
1.129 djm 480: addargs(&alist, "-l");
481: addargs(&alist, "%s", suser);
1.23 markus 482: } else {
483: host = cleanhostname(argv[i]);
484: }
1.129 djm 485: addargs(&alist, "%s", host);
486: addargs(&alist, "%s", cmd);
487: addargs(&alist, "%s", src);
488: addargs(&alist, "%s%s%s:%s",
489: tuser ? tuser : "", tuser ? "@" : "",
490: thost, targ);
491: if (do_local_cmd(&alist) != 0)
1.109 markus 492: errs = 1;
1.18 markus 493: } else { /* local to remote */
1.1 deraadt 494: if (remin == -1) {
1.141 djm 495: xasprintf(&bp, "%s -t %s", cmd, targ);
1.23 markus 496: host = cleanhostname(thost);
1.35 deraadt 497: if (do_cmd(host, tuser, bp, &remin,
1.140 deraadt 498: &remout) < 0)
1.18 markus 499: exit(1);
1.1 deraadt 500: if (response() < 0)
501: exit(1);
1.18 markus 502: (void) xfree(bp);
1.1 deraadt 503: }
1.18 markus 504: source(1, argv + i);
1.1 deraadt 505: }
506: }
1.142 markus 507: xfree(arg);
1.1 deraadt 508: }
509:
510: void
1.104 djm 511: tolocal(int argc, char **argv)
1.1 deraadt 512: {
513: char *bp, *host, *src, *suser;
1.129 djm 514: arglist alist;
1.140 deraadt 515: int i;
1.129 djm 516:
517: memset(&alist, '\0', sizeof(alist));
518: alist.list = NULL;
1.1 deraadt 519:
520: for (i = 0; i < argc - 1; i++) {
1.18 markus 521: if (!(src = colon(argv[i]))) { /* Local to local. */
1.129 djm 522: freeargs(&alist);
523: addargs(&alist, "%s", _PATH_CP);
524: if (iamrecursive)
525: addargs(&alist, "-r");
526: if (pflag)
527: addargs(&alist, "-p");
528: addargs(&alist, "%s", argv[i]);
529: addargs(&alist, "%s", argv[argc-1]);
530: if (do_local_cmd(&alist))
1.1 deraadt 531: ++errs;
532: continue;
533: }
534: *src++ = 0;
535: if (*src == 0)
536: src = ".";
1.94 markus 537: if ((host = strrchr(argv[i], '@')) == NULL) {
1.1 deraadt 538: host = argv[i];
539: suser = NULL;
540: } else {
541: *host++ = 0;
542: suser = argv[i];
543: if (*suser == '\0')
544: suser = pwd->pw_name;
545: }
1.23 markus 546: host = cleanhostname(host);
1.141 djm 547: xasprintf(&bp, "%s -f %s", cmd, src);
1.140 deraadt 548: if (do_cmd(host, suser, bp, &remin, &remout) < 0) {
1.18 markus 549: (void) xfree(bp);
550: ++errs;
551: continue;
1.1 deraadt 552: }
1.18 markus 553: xfree(bp);
1.1 deraadt 554: sink(1, argv + argc - 1);
1.18 markus 555: (void) close(remin);
1.1 deraadt 556: remin = remout = -1;
557: }
558: }
559:
560: void
1.104 djm 561: source(int argc, char **argv)
1.1 deraadt 562: {
563: struct stat stb;
564: static BUF buffer;
565: BUF *bp;
1.122 avsm 566: off_t i, amt, statbytes;
567: size_t result;
1.125 dtucker 568: int fd = -1, haderr, indx;
1.1 deraadt 569: char *last, *name, buf[2048];
1.65 deraadt 570: int len;
1.1 deraadt 571:
572: for (indx = 0; indx < argc; ++indx) {
1.18 markus 573: name = argv[indx];
1.11 aaron 574: statbytes = 0;
1.65 deraadt 575: len = strlen(name);
576: while (len > 1 && name[len-1] == '/')
577: name[--len] = '\0';
1.85 markus 578: if (strchr(name, '\n') != NULL) {
579: run_err("%s: skipping, filename contains a newline",
580: name);
581: goto next;
582: }
1.1 deraadt 583: if ((fd = open(name, O_RDONLY, 0)) < 0)
584: goto syserr;
585: if (fstat(fd, &stb) < 0) {
586: syserr: run_err("%s: %s", name, strerror(errno));
587: goto next;
588: }
589: switch (stb.st_mode & S_IFMT) {
590: case S_IFREG:
591: break;
592: case S_IFDIR:
593: if (iamrecursive) {
594: rsource(name, &stb);
595: goto next;
596: }
597: /* FALLTHROUGH */
598: default:
599: run_err("%s: not a regular file", name);
600: goto next;
601: }
602: if ((last = strrchr(name, '/')) == NULL)
603: last = name;
604: else
605: ++last;
1.11 aaron 606: curfile = last;
1.1 deraadt 607: if (pflag) {
608: /*
609: * Make it compatible with possible future
610: * versions expecting microseconds.
611: */
1.55 deraadt 612: (void) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n",
1.47 markus 613: (u_long) stb.st_mtime,
614: (u_long) stb.st_atime);
1.107 deraadt 615: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 616: if (response() < 0)
617: goto next;
618: }
619: #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
1.61 markus 620: snprintf(buf, sizeof buf, "C%04o %lld %s\n",
1.47 markus 621: (u_int) (stb.st_mode & FILEMODEMASK),
1.62 markus 622: (long long)stb.st_size, last);
1.18 markus 623: if (verbose_mode) {
624: fprintf(stderr, "Sending file modes: %s", buf);
625: }
1.107 deraadt 626: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 627: if (response() < 0)
628: goto next;
629: if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) {
1.127 deraadt 630: next: if (fd != -1) {
631: (void) close(fd);
632: fd = -1;
633: }
1.1 deraadt 634: continue;
635: }
1.97 fgsch 636: if (showprogress)
637: start_progress_meter(curfile, stb.st_size, &statbytes);
1.1 deraadt 638: /* Keep writing after an error so that we stay sync'd up. */
639: for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
640: amt = bp->cnt;
641: if (i + amt > stb.st_size)
642: amt = stb.st_size - i;
643: if (!haderr) {
1.30 deraadt 644: result = atomicio(read, fd, bp->buf, amt);
1.1 deraadt 645: if (result != amt)
1.122 avsm 646: haderr = errno;
1.1 deraadt 647: }
648: if (haderr)
1.107 deraadt 649: (void) atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 650: else {
1.107 deraadt 651: result = atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 652: if (result != amt)
1.122 avsm 653: haderr = errno;
1.4 aaron 654: statbytes += result;
1.1 deraadt 655: }
1.113 djm 656: if (limit_rate)
1.99 markus 657: bwlimit(amt);
1.1 deraadt 658: }
1.18 markus 659: if (showprogress)
1.97 fgsch 660: stop_progress_meter();
1.4 aaron 661:
1.127 deraadt 662: if (fd != -1) {
663: if (close(fd) < 0 && !haderr)
664: haderr = errno;
665: fd = -1;
666: }
1.1 deraadt 667: if (!haderr)
1.107 deraadt 668: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 669: else
670: run_err("%s: %s", name, strerror(haderr));
1.18 markus 671: (void) response();
1.1 deraadt 672: }
673: }
674:
675: void
1.104 djm 676: rsource(char *name, struct stat *statp)
1.1 deraadt 677: {
678: DIR *dirp;
679: struct dirent *dp;
680: char *last, *vect[1], path[1100];
681:
682: if (!(dirp = opendir(name))) {
683: run_err("%s: %s", name, strerror(errno));
684: return;
685: }
686: last = strrchr(name, '/');
687: if (last == 0)
688: last = name;
689: else
690: last++;
691: if (pflag) {
1.55 deraadt 692: (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n",
1.47 markus 693: (u_long) statp->st_mtime,
694: (u_long) statp->st_atime);
1.107 deraadt 695: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 696: if (response() < 0) {
697: closedir(dirp);
698: return;
699: }
700: }
1.55 deraadt 701: (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n",
1.47 markus 702: (u_int) (statp->st_mode & FILEMODEMASK), 0, last);
1.18 markus 703: if (verbose_mode)
704: fprintf(stderr, "Entering directory: %s", path);
1.107 deraadt 705: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 706: if (response() < 0) {
707: closedir(dirp);
708: return;
709: }
1.63 stevesk 710: while ((dp = readdir(dirp)) != NULL) {
1.1 deraadt 711: if (dp->d_ino == 0)
712: continue;
713: if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
714: continue;
715: if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) {
716: run_err("%s/%s: name too long", name, dp->d_name);
717: continue;
718: }
1.55 deraadt 719: (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name);
1.1 deraadt 720: vect[0] = path;
721: source(1, vect);
722: }
1.18 markus 723: (void) closedir(dirp);
1.107 deraadt 724: (void) atomicio(vwrite, remout, "E\n", 2);
1.18 markus 725: (void) response();
1.1 deraadt 726: }
727:
728: void
1.99 markus 729: bwlimit(int amount)
730: {
731: static struct timeval bwstart, bwend;
732: static int lamt, thresh = 16384;
1.115 avsm 733: u_int64_t waitlen;
1.99 markus 734: struct timespec ts, rm;
735:
736: if (!timerisset(&bwstart)) {
737: gettimeofday(&bwstart, NULL);
738: return;
739: }
740:
741: lamt += amount;
742: if (lamt < thresh)
743: return;
744:
745: gettimeofday(&bwend, NULL);
746: timersub(&bwend, &bwstart, &bwend);
747: if (!timerisset(&bwend))
748: return;
749:
750: lamt *= 8;
1.115 avsm 751: waitlen = (double)1000000L * lamt / limit_rate;
1.99 markus 752:
1.115 avsm 753: bwstart.tv_sec = waitlen / 1000000L;
754: bwstart.tv_usec = waitlen % 1000000L;
1.99 markus 755:
756: if (timercmp(&bwstart, &bwend, >)) {
757: timersub(&bwstart, &bwend, &bwend);
758:
759: /* Adjust the wait time */
760: if (bwend.tv_sec) {
761: thresh /= 2;
762: if (thresh < 2048)
763: thresh = 2048;
764: } else if (bwend.tv_usec < 100) {
765: thresh *= 2;
766: if (thresh > 32768)
767: thresh = 32768;
768: }
769:
770: TIMEVAL_TO_TIMESPEC(&bwend, &ts);
771: while (nanosleep(&ts, &rm) == -1) {
772: if (errno != EINTR)
773: break;
774: ts = rm;
775: }
776: }
777:
778: lamt = 0;
779: gettimeofday(&bwstart, NULL);
780: }
781:
782: void
1.104 djm 783: sink(int argc, char **argv)
1.1 deraadt 784: {
785: static BUF buffer;
786: struct stat stb;
1.18 markus 787: enum {
788: YES, NO, DISPLAYED
789: } wrerr;
1.1 deraadt 790: BUF *bp;
1.122 avsm 791: off_t i;
1.124 djm 792: size_t j, count;
1.140 deraadt 793: int amt, exists, first, ofd;
794: mode_t mode, omode, mask;
1.97 fgsch 795: off_t size, statbytes;
1.36 deraadt 796: int setimes, targisdir, wrerrno = 0;
1.1 deraadt 797: char ch, *cp, *np, *targ, *why, *vect[1], buf[2048];
1.40 markus 798: struct timeval tv[2];
1.1 deraadt 799:
1.66 stevesk 800: #define atime tv[0]
801: #define mtime tv[1]
1.118 deraadt 802: #define SCREWUP(str) { why = str; goto screwup; }
1.1 deraadt 803:
804: setimes = targisdir = 0;
805: mask = umask(0);
806: if (!pflag)
1.18 markus 807: (void) umask(mask);
1.1 deraadt 808: if (argc != 1) {
809: run_err("ambiguous target");
810: exit(1);
811: }
812: targ = *argv;
813: if (targetshouldbedirectory)
814: verifydir(targ);
1.18 markus 815:
1.107 deraadt 816: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 817: if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
818: targisdir = 1;
819: for (first = 1;; first = 0) {
820: cp = buf;
1.122 avsm 821: if (atomicio(read, remin, cp, 1) != 1)
1.1 deraadt 822: return;
823: if (*cp++ == '\n')
824: SCREWUP("unexpected <newline>");
825: do {
1.30 deraadt 826: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 827: SCREWUP("lost connection");
828: *cp++ = ch;
829: } while (cp < &buf[sizeof(buf) - 1] && ch != '\n');
830: *cp = 0;
1.114 markus 831: if (verbose_mode)
832: fprintf(stderr, "Sink: %s", buf);
1.1 deraadt 833:
834: if (buf[0] == '\01' || buf[0] == '\02') {
835: if (iamremote == 0)
1.107 deraadt 836: (void) atomicio(vwrite, STDERR_FILENO,
1.44 deraadt 837: buf + 1, strlen(buf + 1));
1.1 deraadt 838: if (buf[0] == '\02')
839: exit(1);
840: ++errs;
841: continue;
842: }
843: if (buf[0] == 'E') {
1.107 deraadt 844: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 845: return;
846: }
847: if (ch == '\n')
848: *--cp = 0;
849:
850: cp = buf;
851: if (*cp == 'T') {
852: setimes++;
853: cp++;
1.66 stevesk 854: mtime.tv_sec = strtol(cp, &cp, 10);
855: if (!cp || *cp++ != ' ')
1.1 deraadt 856: SCREWUP("mtime.sec not delimited");
1.66 stevesk 857: mtime.tv_usec = strtol(cp, &cp, 10);
858: if (!cp || *cp++ != ' ')
1.1 deraadt 859: SCREWUP("mtime.usec not delimited");
1.66 stevesk 860: atime.tv_sec = strtol(cp, &cp, 10);
861: if (!cp || *cp++ != ' ')
1.1 deraadt 862: SCREWUP("atime.sec not delimited");
1.66 stevesk 863: atime.tv_usec = strtol(cp, &cp, 10);
864: if (!cp || *cp++ != '\0')
1.1 deraadt 865: SCREWUP("atime.usec not delimited");
1.107 deraadt 866: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 867: continue;
868: }
869: if (*cp != 'C' && *cp != 'D') {
870: /*
871: * Check for the case "rcp remote:foo\* local:bar".
872: * In this case, the line "No match." can be returned
873: * by the shell before the rcp command on the remote is
874: * executed so the ^Aerror_message convention isn't
875: * followed.
876: */
877: if (first) {
878: run_err("%s", cp);
879: exit(1);
880: }
881: SCREWUP("expected control record");
882: }
883: mode = 0;
884: for (++cp; cp < buf + 5; cp++) {
885: if (*cp < '0' || *cp > '7')
886: SCREWUP("bad mode");
887: mode = (mode << 3) | (*cp - '0');
888: }
889: if (*cp++ != ' ')
890: SCREWUP("mode not delimited");
891:
1.63 stevesk 892: for (size = 0; isdigit(*cp);)
1.1 deraadt 893: size = size * 10 + (*cp++ - '0');
894: if (*cp++ != ' ')
895: SCREWUP("size not delimited");
1.114 markus 896: if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) {
897: run_err("error: unexpected filename: %s", cp);
898: exit(1);
899: }
1.1 deraadt 900: if (targisdir) {
901: static char *namebuf;
1.124 djm 902: static size_t cursize;
1.1 deraadt 903: size_t need;
904:
905: need = strlen(targ) + strlen(cp) + 250;
1.55 deraadt 906: if (need > cursize) {
1.58 danh 907: if (namebuf)
908: xfree(namebuf);
1.18 markus 909: namebuf = xmalloc(need);
1.55 deraadt 910: cursize = need;
911: }
912: (void) snprintf(namebuf, need, "%s%s%s", targ,
1.88 mouring 913: strcmp(targ, "/") ? "/" : "", cp);
1.1 deraadt 914: np = namebuf;
915: } else
916: np = targ;
1.12 aaron 917: curfile = cp;
1.1 deraadt 918: exists = stat(np, &stb) == 0;
919: if (buf[0] == 'D') {
920: int mod_flag = pflag;
1.114 markus 921: if (!iamrecursive)
922: SCREWUP("received directory without -r");
1.1 deraadt 923: if (exists) {
924: if (!S_ISDIR(stb.st_mode)) {
925: errno = ENOTDIR;
926: goto bad;
927: }
928: if (pflag)
1.18 markus 929: (void) chmod(np, mode);
1.1 deraadt 930: } else {
1.18 markus 931: /* Handle copying from a read-only
932: directory */
1.1 deraadt 933: mod_flag = 1;
934: if (mkdir(np, mode | S_IRWXU) < 0)
935: goto bad;
936: }
1.58 danh 937: vect[0] = xstrdup(np);
1.1 deraadt 938: sink(1, vect);
939: if (setimes) {
940: setimes = 0;
1.59 deraadt 941: if (utimes(vect[0], tv) < 0)
1.18 markus 942: run_err("%s: set times: %s",
1.59 deraadt 943: vect[0], strerror(errno));
1.1 deraadt 944: }
945: if (mod_flag)
1.59 deraadt 946: (void) chmod(vect[0], mode);
947: if (vect[0])
948: xfree(vect[0]);
1.1 deraadt 949: continue;
950: }
951: omode = mode;
952: mode |= S_IWRITE;
1.71 markus 953: if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
1.1 deraadt 954: bad: run_err("%s: %s", np, strerror(errno));
955: continue;
956: }
1.107 deraadt 957: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 958: if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) {
1.18 markus 959: (void) close(ofd);
1.1 deraadt 960: continue;
961: }
962: cp = bp->buf;
963: wrerr = NO;
1.7 deraadt 964:
1.12 aaron 965: statbytes = 0;
1.97 fgsch 966: if (showprogress)
967: start_progress_meter(curfile, size, &statbytes);
1.1 deraadt 968: for (count = i = 0; i < size; i += 4096) {
969: amt = 4096;
970: if (i + amt > size)
971: amt = size - i;
972: count += amt;
973: do {
1.117 avsm 974: j = atomicio(read, remin, cp, amt);
1.122 avsm 975: if (j == 0) {
1.1 deraadt 976: run_err("%s", j ? strerror(errno) :
1.63 stevesk 977: "dropped connection");
1.1 deraadt 978: exit(1);
979: }
980: amt -= j;
981: cp += j;
1.18 markus 982: statbytes += j;
1.1 deraadt 983: } while (amt > 0);
1.112 djm 984:
1.113 djm 985: if (limit_rate)
1.99 markus 986: bwlimit(4096);
987:
1.1 deraadt 988: if (count == bp->cnt) {
989: /* Keep reading so we stay sync'd up. */
990: if (wrerr == NO) {
1.122 avsm 991: if (atomicio(vwrite, ofd, bp->buf,
992: count) != count) {
1.1 deraadt 993: wrerr = YES;
1.122 avsm 994: wrerrno = errno;
1.1 deraadt 995: }
996: }
997: count = 0;
998: cp = bp->buf;
999: }
1000: }
1.7 deraadt 1001: if (showprogress)
1.97 fgsch 1002: stop_progress_meter();
1.1 deraadt 1003: if (count != 0 && wrerr == NO &&
1.122 avsm 1004: atomicio(vwrite, ofd, bp->buf, count) != count) {
1.1 deraadt 1005: wrerr = YES;
1.122 avsm 1006: wrerrno = errno;
1.1 deraadt 1007: }
1.98 djm 1008: if (wrerr == NO && ftruncate(ofd, size) != 0) {
1.1 deraadt 1009: run_err("%s: truncate: %s", np, strerror(errno));
1010: wrerr = DISPLAYED;
1011: }
1012: if (pflag) {
1013: if (exists || omode != mode)
1.116 dtucker 1014: if (fchmod(ofd, omode)) {
1.1 deraadt 1015: run_err("%s: set mode: %s",
1.63 stevesk 1016: np, strerror(errno));
1.116 dtucker 1017: wrerr = DISPLAYED;
1018: }
1.1 deraadt 1019: } else {
1020: if (!exists && omode != mode)
1.116 dtucker 1021: if (fchmod(ofd, omode & ~mask)) {
1.1 deraadt 1022: run_err("%s: set mode: %s",
1.63 stevesk 1023: np, strerror(errno));
1.116 dtucker 1024: wrerr = DISPLAYED;
1025: }
1.1 deraadt 1026: }
1.33 provos 1027: if (close(ofd) == -1) {
1028: wrerr = YES;
1029: wrerrno = errno;
1030: }
1.18 markus 1031: (void) response();
1.1 deraadt 1032: if (setimes && wrerr == NO) {
1033: setimes = 0;
1.40 markus 1034: if (utimes(np, tv) < 0) {
1.1 deraadt 1035: run_err("%s: set times: %s",
1.63 stevesk 1036: np, strerror(errno));
1.1 deraadt 1037: wrerr = DISPLAYED;
1038: }
1039: }
1.18 markus 1040: switch (wrerr) {
1.1 deraadt 1041: case YES:
1042: run_err("%s: %s", np, strerror(wrerrno));
1043: break;
1044: case NO:
1.107 deraadt 1045: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 1046: break;
1047: case DISPLAYED:
1048: break;
1049: }
1050: }
1051: screwup:
1052: run_err("protocol error: %s", why);
1053: exit(1);
1054: }
1055:
1056: int
1.86 itojun 1057: response(void)
1.1 deraadt 1058: {
1059: char ch, *cp, resp, rbuf[2048];
1060:
1.30 deraadt 1061: if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp))
1.1 deraadt 1062: lostconn(0);
1063:
1064: cp = rbuf;
1.18 markus 1065: switch (resp) {
1066: case 0: /* ok */
1.1 deraadt 1067: return (0);
1068: default:
1069: *cp++ = resp;
1070: /* FALLTHROUGH */
1.18 markus 1071: case 1: /* error, followed by error msg */
1072: case 2: /* fatal error, "" */
1.1 deraadt 1073: do {
1.30 deraadt 1074: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 1075: lostconn(0);
1076: *cp++ = ch;
1077: } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
1078:
1079: if (!iamremote)
1.107 deraadt 1080: (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf);
1.1 deraadt 1081: ++errs;
1082: if (resp == 1)
1083: return (-1);
1084: exit(1);
1085: }
1086: /* NOTREACHED */
1087: }
1088:
1089: void
1.86 itojun 1090: usage(void)
1.1 deraadt 1091: {
1.83 stevesk 1092: (void) fprintf(stderr,
1.110 jmc 1093: "usage: scp [-1246BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n"
1094: " [-l limit] [-o ssh_option] [-P port] [-S program]\n"
1.90 deraadt 1095: " [[user@]host1:]file1 [...] [[user@]host2:]file2\n");
1.1 deraadt 1096: exit(1);
1097: }
1098:
1099: void
1.18 markus 1100: run_err(const char *fmt,...)
1.1 deraadt 1101: {
1102: static FILE *fp;
1103: va_list ap;
1104:
1105: ++errs;
1.136 biorn 1106: if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) {
1107: (void) fprintf(fp, "%c", 0x01);
1108: (void) fprintf(fp, "scp: ");
1109: va_start(ap, fmt);
1110: (void) vfprintf(fp, fmt, ap);
1111: va_end(ap);
1112: (void) fprintf(fp, "\n");
1113: (void) fflush(fp);
1114: }
1.18 markus 1115:
1116: if (!iamremote) {
1.73 markus 1117: va_start(ap, fmt);
1.18 markus 1118: vfprintf(stderr, fmt, ap);
1.73 markus 1119: va_end(ap);
1.18 markus 1120: fprintf(stderr, "\n");
1121: }
1.1 deraadt 1122: }
1123:
1124: void
1.104 djm 1125: verifydir(char *cp)
1.1 deraadt 1126: {
1127: struct stat stb;
1128:
1129: if (!stat(cp, &stb)) {
1130: if (S_ISDIR(stb.st_mode))
1131: return;
1132: errno = ENOTDIR;
1133: }
1134: run_err("%s: %s", cp, strerror(errno));
1.123 avsm 1135: killchild(0);
1.1 deraadt 1136: }
1137:
1138: int
1.104 djm 1139: okname(char *cp0)
1.1 deraadt 1140: {
1141: int c;
1142: char *cp;
1143:
1144: cp = cp0;
1145: do {
1.75 deraadt 1146: c = (int)*cp;
1.1 deraadt 1147: if (c & 0200)
1148: goto bad;
1.101 markus 1149: if (!isalpha(c) && !isdigit(c)) {
1150: switch (c) {
1151: case '\'':
1152: case '"':
1153: case '`':
1154: case ' ':
1155: case '#':
1156: goto bad;
1157: default:
1158: break;
1159: }
1160: }
1.1 deraadt 1161: } while (*++cp);
1162: return (1);
1163:
1.25 markus 1164: bad: fprintf(stderr, "%s: invalid user name\n", cp0);
1.1 deraadt 1165: return (0);
1166: }
1167:
1168: BUF *
1.104 djm 1169: allocbuf(BUF *bp, int fd, int blksize)
1.1 deraadt 1170: {
1171: size_t size;
1172: struct stat stb;
1173:
1174: if (fstat(fd, &stb) < 0) {
1175: run_err("fstat: %s", strerror(errno));
1176: return (0);
1177: }
1.95 markus 1178: size = roundup(stb.st_blksize, blksize);
1179: if (size == 0)
1.18 markus 1180: size = blksize;
1.1 deraadt 1181: if (bp->cnt >= size)
1182: return (bp);
1.18 markus 1183: if (bp->buf == NULL)
1184: bp->buf = xmalloc(size);
1185: else
1.138 djm 1186: bp->buf = xrealloc(bp->buf, 1, size);
1.81 markus 1187: memset(bp->buf, 0, size);
1.1 deraadt 1188: bp->cnt = size;
1189: return (bp);
1190: }
1191:
1192: void
1.104 djm 1193: lostconn(int signo)
1.1 deraadt 1194: {
1195: if (!iamremote)
1.74 markus 1196: write(STDERR_FILENO, "lost connection\n", 16);
1197: if (signo)
1198: _exit(1);
1199: else
1200: exit(1);
1.4 aaron 1201: }
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