Annotation of src/usr.bin/ssh/scp.c, Revision 1.158
1.158 ! dtucker 1: /* $OpenBSD: scp.c,v 1.157 2007/06/12 08:24:20 djm 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:
1.155 deraadt 74: #include <sys/param.h>
1.132 stevesk 75: #include <sys/types.h>
76: #include <sys/wait.h>
1.134 stevesk 77: #include <sys/stat.h>
1.151 stevesk 78: #include <sys/time.h>
1.155 deraadt 79: #include <sys/uio.h>
1.131 stevesk 80:
1.135 stevesk 81: #include <ctype.h>
1.131 stevesk 82: #include <dirent.h>
1.147 stevesk 83: #include <errno.h>
1.144 stevesk 84: #include <fcntl.h>
1.143 stevesk 85: #include <pwd.h>
1.133 stevesk 86: #include <signal.h>
1.146 stevesk 87: #include <stdarg.h>
1.154 stevesk 88: #include <stdio.h>
1.153 stevesk 89: #include <stdlib.h>
1.150 stevesk 90: #include <string.h>
1.149 stevesk 91: #include <time.h>
1.148 stevesk 92: #include <unistd.h>
1.158 ! dtucker 93: #include <vis.h>
1.1 deraadt 94:
95: #include "xmalloc.h"
1.51 markus 96: #include "atomicio.h"
1.50 markus 97: #include "pathnames.h"
1.51 markus 98: #include "log.h"
1.69 mouring 99: #include "misc.h"
1.97 fgsch 100: #include "progressmeter.h"
1.1 deraadt 101:
1.140 deraadt 102: int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout);
1.11 aaron 103:
1.99 markus 104: void bwlimit(int);
105:
1.70 mouring 106: /* Struct for addargs */
107: arglist args;
1.41 markus 108:
1.99 markus 109: /* Bandwidth limit */
1.113 djm 110: off_t limit_rate = 0;
1.99 markus 111:
1.11 aaron 112: /* Name of current file being transferred. */
113: char *curfile;
1.4 aaron 114:
1.1 deraadt 115: /* This is set to non-zero to enable verbose mode. */
1.17 markus 116: int verbose_mode = 0;
1.1 deraadt 117:
1.6 aaron 118: /* This is set to zero if the progressmeter is not desired. */
119: int showprogress = 1;
120:
1.34 deraadt 121: /* This is the program to execute for the secured connection. ("ssh" or -S) */
1.50 markus 122: char *ssh_program = _PATH_SSH_PROGRAM;
1.34 deraadt 123:
1.92 markus 124: /* This is used to store the pid of ssh_program */
1.105 djm 125: pid_t do_cmd_pid = -1;
126:
127: static void
128: killchild(int signo)
129: {
1.119 dtucker 130: if (do_cmd_pid > 1) {
1.123 avsm 131: kill(do_cmd_pid, signo ? signo : SIGTERM);
1.119 dtucker 132: waitpid(do_cmd_pid, NULL, 0);
133: }
1.105 djm 134:
1.123 avsm 135: if (signo)
136: _exit(1);
137: exit(1);
1.105 djm 138: }
1.92 markus 139:
1.129 djm 140: static int
141: do_local_cmd(arglist *a)
142: {
143: u_int i;
144: int status;
145: pid_t pid;
146:
147: if (a->num == 0)
148: fatal("do_local_cmd: no arguments");
149:
150: if (verbose_mode) {
151: fprintf(stderr, "Executing:");
152: for (i = 0; i < a->num; i++)
153: fprintf(stderr, " %s", a->list[i]);
154: fprintf(stderr, "\n");
155: }
156: if ((pid = fork()) == -1)
157: fatal("do_local_cmd: fork: %s", strerror(errno));
158:
159: if (pid == 0) {
160: execvp(a->list[0], a->list);
161: perror(a->list[0]);
162: exit(1);
163: }
164:
165: do_cmd_pid = pid;
166: signal(SIGTERM, killchild);
167: signal(SIGINT, killchild);
168: signal(SIGHUP, killchild);
169:
170: while (waitpid(pid, &status, 0) == -1)
171: if (errno != EINTR)
172: fatal("do_local_cmd: waitpid: %s", strerror(errno));
173:
174: do_cmd_pid = -1;
175:
176: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
177: return (-1);
178:
179: return (0);
180: }
181:
1.20 markus 182: /*
183: * This function executes the given command as the specified user on the
184: * given host. This returns < 0 if execution fails, and >= 0 otherwise. This
185: * assigns the input and output file descriptors on success.
186: */
1.1 deraadt 187:
1.27 markus 188: int
1.140 deraadt 189: do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout)
1.1 deraadt 190: {
1.18 markus 191: int pin[2], pout[2], reserved[2];
192:
193: if (verbose_mode)
1.78 deraadt 194: fprintf(stderr,
195: "Executing: program %s host %s, user %s, command %s\n",
196: ssh_program, host,
197: remuser ? remuser : "(unspecified)", cmd);
1.18 markus 198:
1.20 markus 199: /*
200: * Reserve two descriptors so that the real pipes won't get
201: * descriptors 0 and 1 because that will screw up dup2 below.
202: */
1.142 markus 203: if (pipe(reserved) < 0)
204: fatal("pipe: %s", strerror(errno));
1.18 markus 205:
206: /* Create a socket pair for communicating with ssh. */
207: if (pipe(pin) < 0)
208: fatal("pipe: %s", strerror(errno));
209: if (pipe(pout) < 0)
210: fatal("pipe: %s", strerror(errno));
211:
212: /* Free the reserved descriptors. */
213: close(reserved[0]);
214: close(reserved[1]);
215:
1.106 nino 216: /* Fork a child to execute the command on the remote host using ssh. */
1.92 markus 217: do_cmd_pid = fork();
218: if (do_cmd_pid == 0) {
1.18 markus 219: /* Child. */
220: close(pin[1]);
221: close(pout[0]);
222: dup2(pin[0], 0);
223: dup2(pout[1], 1);
224: close(pin[0]);
225: close(pout[1]);
226:
1.129 djm 227: replacearg(&args, 0, "%s", ssh_program);
1.41 markus 228: if (remuser != NULL)
1.70 mouring 229: addargs(&args, "-l%s", remuser);
230: addargs(&args, "%s", host);
231: addargs(&args, "%s", cmd);
1.18 markus 232:
1.41 markus 233: execvp(ssh_program, args.list);
1.34 deraadt 234: perror(ssh_program);
1.18 markus 235: exit(1);
1.92 markus 236: } else if (do_cmd_pid == -1) {
237: fatal("fork: %s", strerror(errno));
1.18 markus 238: }
239: /* Parent. Close the other side, and return the local side. */
240: close(pin[0]);
241: *fdout = pin[1];
242: close(pout[1]);
243: *fdin = pout[0];
1.105 djm 244: signal(SIGTERM, killchild);
245: signal(SIGINT, killchild);
246: signal(SIGHUP, killchild);
1.18 markus 247: return 0;
1.1 deraadt 248: }
249:
250: typedef struct {
1.124 djm 251: size_t cnt;
1.1 deraadt 252: char *buf;
253: } BUF;
254:
1.18 markus 255: BUF *allocbuf(BUF *, int, int);
256: void lostconn(int);
257: int okname(char *);
258: void run_err(const char *,...);
259: void verifydir(char *);
1.1 deraadt 260:
261: struct passwd *pwd;
1.18 markus 262: uid_t userid;
1.1 deraadt 263: int errs, remin, remout;
264: int pflag, iamremote, iamrecursive, targetshouldbedirectory;
265:
266: #define CMDNEEDS 64
267: char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
268:
1.18 markus 269: int response(void);
270: void rsource(char *, struct stat *);
271: void sink(int, char *[]);
272: void source(int, char *[]);
273: void tolocal(int, char *[]);
274: void toremote(char *, int, char *[]);
275: void usage(void);
1.1 deraadt 276:
277: int
1.104 djm 278: main(int argc, char **argv)
1.1 deraadt 279: {
1.145 djm 280: int ch, fflag, tflag, status, n;
1.99 markus 281: double speed;
1.145 djm 282: char *targ, *endp, **newargv;
1.1 deraadt 283: extern char *optarg;
284: extern int optind;
1.126 djm 285:
286: /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
287: sanitise_stdfd();
1.145 djm 288:
289: /* Copy argv, because we modify it */
290: newargv = xcalloc(MAX(argc + 1, 1), sizeof(*newargv));
291: for (n = 0; n < argc; n++)
292: newargv[n] = xstrdup(argv[n]);
293: argv = newargv;
1.1 deraadt 294:
1.129 djm 295: memset(&args, '\0', sizeof(args));
1.41 markus 296: args.list = NULL;
1.129 djm 297: addargs(&args, "%s", ssh_program);
1.70 mouring 298: addargs(&args, "-x");
1.82 stevesk 299: addargs(&args, "-oForwardAgent no");
1.128 reyk 300: addargs(&args, "-oPermitLocalCommand no");
1.84 stevesk 301: addargs(&args, "-oClearAllForwardings yes");
1.41 markus 302:
1.1 deraadt 303: fflag = tflag = 0;
1.100 markus 304: while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q1246S:o:F:")) != -1)
1.18 markus 305: switch (ch) {
306: /* User-visible flags. */
1.100 markus 307: case '1':
308: case '2':
1.23 markus 309: case '4':
1.41 markus 310: case '6':
311: case 'C':
1.70 mouring 312: addargs(&args, "-%c", ch);
1.41 markus 313: break;
314: case 'o':
315: case 'c':
316: case 'i':
1.83 stevesk 317: case 'F':
1.70 mouring 318: addargs(&args, "-%c%s", ch, optarg);
1.23 markus 319: break;
1.41 markus 320: case 'P':
1.70 mouring 321: addargs(&args, "-p%s", optarg);
1.41 markus 322: break;
323: case 'B':
1.70 mouring 324: addargs(&args, "-oBatchmode yes");
1.23 markus 325: break;
1.99 markus 326: case 'l':
327: speed = strtod(optarg, &endp);
328: if (speed <= 0 || *endp != '\0')
329: usage();
1.113 djm 330: limit_rate = speed * 1024;
1.99 markus 331: break;
1.1 deraadt 332: case 'p':
333: pflag = 1;
334: break;
335: case 'r':
336: iamrecursive = 1;
337: break;
1.34 deraadt 338: case 'S':
1.41 markus 339: ssh_program = xstrdup(optarg);
340: break;
341: case 'v':
1.72 markus 342: addargs(&args, "-v");
1.41 markus 343: verbose_mode = 1;
344: break;
345: case 'q':
1.111 dtucker 346: addargs(&args, "-q");
1.41 markus 347: showprogress = 0;
1.34 deraadt 348: break;
349:
1.18 markus 350: /* Server options. */
1.1 deraadt 351: case 'd':
352: targetshouldbedirectory = 1;
353: break;
1.18 markus 354: case 'f': /* "from" */
1.1 deraadt 355: iamremote = 1;
356: fflag = 1;
357: break;
1.18 markus 358: case 't': /* "to" */
1.1 deraadt 359: iamremote = 1;
360: tflag = 1;
361: break;
362: default:
363: usage();
364: }
365: argc -= optind;
366: argv += optind;
367:
368: if ((pwd = getpwuid(userid = getuid())) == NULL)
1.108 deraadt 369: fatal("unknown user %u", (u_int) userid);
1.1 deraadt 370:
1.156 djm 371: if (!isatty(STDOUT_FILENO))
1.7 deraadt 372: showprogress = 0;
373:
1.1 deraadt 374: remin = STDIN_FILENO;
375: remout = STDOUT_FILENO;
376:
1.52 stevesk 377: if (fflag) {
1.18 markus 378: /* Follow "protocol", send data. */
379: (void) response();
1.1 deraadt 380: source(argc, argv);
381: exit(errs != 0);
382: }
1.18 markus 383: if (tflag) {
384: /* Receive data. */
1.1 deraadt 385: sink(argc, argv);
386: exit(errs != 0);
387: }
388: if (argc < 2)
389: usage();
390: if (argc > 2)
391: targetshouldbedirectory = 1;
392:
393: remin = remout = -1;
1.92 markus 394: do_cmd_pid = -1;
1.1 deraadt 395: /* Command to be executed on remote system using "ssh". */
1.55 deraadt 396: (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
397: verbose_mode ? " -v" : "",
1.35 deraadt 398: iamrecursive ? " -r" : "", pflag ? " -p" : "",
399: targetshouldbedirectory ? " -d" : "");
1.1 deraadt 400:
1.18 markus 401: (void) signal(SIGPIPE, lostconn);
1.1 deraadt 402:
403: if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */
404: toremote(targ, argc, argv);
405: else {
406: if (targetshouldbedirectory)
407: verifydir(argv[argc - 1]);
1.130 djm 408: tolocal(argc, argv); /* Dest is local host. */
1.92 markus 409: }
410: /*
411: * Finally check the exit status of the ssh process, if one was forked
412: * and no error has occured yet
413: */
414: if (do_cmd_pid != -1 && errs == 0) {
415: if (remin != -1)
416: (void) close(remin);
417: if (remout != -1)
418: (void) close(remout);
419: if (waitpid(do_cmd_pid, &status, 0) == -1)
420: errs = 1;
421: else {
422: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
423: errs = 1;
424: }
1.1 deraadt 425: }
426: exit(errs != 0);
427: }
428:
429: void
1.104 djm 430: toremote(char *targ, int argc, char **argv)
1.1 deraadt 431: {
1.120 deraadt 432: char *bp, *host, *src, *suser, *thost, *tuser, *arg;
1.129 djm 433: arglist alist;
1.140 deraadt 434: int i;
1.129 djm 435:
436: memset(&alist, '\0', sizeof(alist));
437: alist.list = NULL;
1.1 deraadt 438:
439: *targ++ = 0;
440: if (*targ == 0)
441: targ = ".";
442:
1.121 djm 443: arg = xstrdup(argv[argc - 1]);
1.120 deraadt 444: if ((thost = strrchr(arg, '@'))) {
1.1 deraadt 445: /* user@host */
446: *thost++ = 0;
1.120 deraadt 447: tuser = arg;
1.1 deraadt 448: if (*tuser == '\0')
449: tuser = NULL;
450: } else {
1.120 deraadt 451: thost = arg;
1.1 deraadt 452: tuser = NULL;
453: }
454:
1.129 djm 455: if (tuser != NULL && !okname(tuser)) {
456: xfree(arg);
457: return;
458: }
459:
1.1 deraadt 460: for (i = 0; i < argc - 1; i++) {
461: src = colon(argv[i]);
1.18 markus 462: if (src) { /* remote to remote */
1.129 djm 463: freeargs(&alist);
464: addargs(&alist, "%s", ssh_program);
465: if (verbose_mode)
466: addargs(&alist, "-v");
467: addargs(&alist, "-x");
468: addargs(&alist, "-oClearAllForwardings yes");
469: addargs(&alist, "-n");
470:
1.1 deraadt 471: *src++ = 0;
472: if (*src == 0)
473: src = ".";
1.94 markus 474: host = strrchr(argv[i], '@');
1.129 djm 475:
1.1 deraadt 476: if (host) {
477: *host++ = 0;
1.23 markus 478: host = cleanhostname(host);
1.1 deraadt 479: suser = argv[i];
480: if (*suser == '\0')
481: suser = pwd->pw_name;
1.129 djm 482: else if (!okname(suser))
1.101 markus 483: continue;
1.129 djm 484: addargs(&alist, "-l");
485: addargs(&alist, "%s", suser);
1.23 markus 486: } else {
487: host = cleanhostname(argv[i]);
488: }
1.129 djm 489: addargs(&alist, "%s", host);
490: addargs(&alist, "%s", cmd);
491: addargs(&alist, "%s", src);
492: addargs(&alist, "%s%s%s:%s",
493: tuser ? tuser : "", tuser ? "@" : "",
494: thost, targ);
495: if (do_local_cmd(&alist) != 0)
1.109 markus 496: errs = 1;
1.18 markus 497: } else { /* local to remote */
1.1 deraadt 498: if (remin == -1) {
1.141 djm 499: xasprintf(&bp, "%s -t %s", cmd, targ);
1.23 markus 500: host = cleanhostname(thost);
1.35 deraadt 501: if (do_cmd(host, tuser, bp, &remin,
1.140 deraadt 502: &remout) < 0)
1.18 markus 503: exit(1);
1.1 deraadt 504: if (response() < 0)
505: exit(1);
1.18 markus 506: (void) xfree(bp);
1.1 deraadt 507: }
1.18 markus 508: source(1, argv + i);
1.1 deraadt 509: }
510: }
1.142 markus 511: xfree(arg);
1.1 deraadt 512: }
513:
514: void
1.104 djm 515: tolocal(int argc, char **argv)
1.1 deraadt 516: {
517: char *bp, *host, *src, *suser;
1.129 djm 518: arglist alist;
1.140 deraadt 519: int i;
1.129 djm 520:
521: memset(&alist, '\0', sizeof(alist));
522: alist.list = NULL;
1.1 deraadt 523:
524: for (i = 0; i < argc - 1; i++) {
1.18 markus 525: if (!(src = colon(argv[i]))) { /* Local to local. */
1.129 djm 526: freeargs(&alist);
527: addargs(&alist, "%s", _PATH_CP);
528: if (iamrecursive)
529: addargs(&alist, "-r");
530: if (pflag)
531: addargs(&alist, "-p");
532: addargs(&alist, "%s", argv[i]);
533: addargs(&alist, "%s", argv[argc-1]);
534: if (do_local_cmd(&alist))
1.1 deraadt 535: ++errs;
536: continue;
537: }
538: *src++ = 0;
539: if (*src == 0)
540: src = ".";
1.94 markus 541: if ((host = strrchr(argv[i], '@')) == NULL) {
1.1 deraadt 542: host = argv[i];
543: suser = NULL;
544: } else {
545: *host++ = 0;
546: suser = argv[i];
547: if (*suser == '\0')
548: suser = pwd->pw_name;
549: }
1.23 markus 550: host = cleanhostname(host);
1.141 djm 551: xasprintf(&bp, "%s -f %s", cmd, src);
1.140 deraadt 552: if (do_cmd(host, suser, bp, &remin, &remout) < 0) {
1.18 markus 553: (void) xfree(bp);
554: ++errs;
555: continue;
1.1 deraadt 556: }
1.18 markus 557: xfree(bp);
1.1 deraadt 558: sink(1, argv + argc - 1);
1.18 markus 559: (void) close(remin);
1.1 deraadt 560: remin = remout = -1;
561: }
562: }
563:
564: void
1.104 djm 565: source(int argc, char **argv)
1.1 deraadt 566: {
567: struct stat stb;
568: static BUF buffer;
569: BUF *bp;
1.122 avsm 570: off_t i, amt, statbytes;
571: size_t result;
1.125 dtucker 572: int fd = -1, haderr, indx;
1.158 ! dtucker 573: char *last, *name, buf[2048], encname[MAXPATHLEN];
1.65 deraadt 574: int len;
1.1 deraadt 575:
576: for (indx = 0; indx < argc; ++indx) {
1.18 markus 577: name = argv[indx];
1.11 aaron 578: statbytes = 0;
1.65 deraadt 579: len = strlen(name);
580: while (len > 1 && name[len-1] == '/')
581: name[--len] = '\0';
1.158 ! dtucker 582: if ((fd = open(name, O_RDONLY|O_NONBLOCK, 0)) < 0)
! 583: goto syserr;
1.85 markus 584: if (strchr(name, '\n') != NULL) {
1.158 ! dtucker 585: strnvis(encname, name, sizeof(encname), VIS_NL);
! 586: name = encname;
1.85 markus 587: }
1.1 deraadt 588: if (fstat(fd, &stb) < 0) {
589: syserr: run_err("%s: %s", name, strerror(errno));
590: goto next;
591: }
1.157 djm 592: unset_nonblock(fd);
1.1 deraadt 593: switch (stb.st_mode & S_IFMT) {
594: case S_IFREG:
595: break;
596: case S_IFDIR:
597: if (iamrecursive) {
598: rsource(name, &stb);
599: goto next;
600: }
601: /* FALLTHROUGH */
602: default:
603: run_err("%s: not a regular file", name);
604: goto next;
605: }
606: if ((last = strrchr(name, '/')) == NULL)
607: last = name;
608: else
609: ++last;
1.11 aaron 610: curfile = last;
1.1 deraadt 611: if (pflag) {
612: /*
613: * Make it compatible with possible future
614: * versions expecting microseconds.
615: */
1.55 deraadt 616: (void) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n",
1.47 markus 617: (u_long) stb.st_mtime,
618: (u_long) stb.st_atime);
1.107 deraadt 619: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 620: if (response() < 0)
621: goto next;
622: }
623: #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
1.61 markus 624: snprintf(buf, sizeof buf, "C%04o %lld %s\n",
1.47 markus 625: (u_int) (stb.st_mode & FILEMODEMASK),
1.62 markus 626: (long long)stb.st_size, last);
1.18 markus 627: if (verbose_mode) {
628: fprintf(stderr, "Sending file modes: %s", buf);
629: }
1.107 deraadt 630: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 631: if (response() < 0)
632: goto next;
633: if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) {
1.127 deraadt 634: next: if (fd != -1) {
635: (void) close(fd);
636: fd = -1;
637: }
1.1 deraadt 638: continue;
639: }
1.97 fgsch 640: if (showprogress)
641: start_progress_meter(curfile, stb.st_size, &statbytes);
1.1 deraadt 642: /* Keep writing after an error so that we stay sync'd up. */
643: for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
644: amt = bp->cnt;
645: if (i + amt > stb.st_size)
646: amt = stb.st_size - i;
647: if (!haderr) {
1.30 deraadt 648: result = atomicio(read, fd, bp->buf, amt);
1.1 deraadt 649: if (result != amt)
1.122 avsm 650: haderr = errno;
1.1 deraadt 651: }
652: if (haderr)
1.107 deraadt 653: (void) atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 654: else {
1.107 deraadt 655: result = atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 656: if (result != amt)
1.122 avsm 657: haderr = errno;
1.4 aaron 658: statbytes += result;
1.1 deraadt 659: }
1.113 djm 660: if (limit_rate)
1.99 markus 661: bwlimit(amt);
1.1 deraadt 662: }
1.18 markus 663: if (showprogress)
1.97 fgsch 664: stop_progress_meter();
1.4 aaron 665:
1.127 deraadt 666: if (fd != -1) {
667: if (close(fd) < 0 && !haderr)
668: haderr = errno;
669: fd = -1;
670: }
1.1 deraadt 671: if (!haderr)
1.107 deraadt 672: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 673: else
674: run_err("%s: %s", name, strerror(haderr));
1.18 markus 675: (void) response();
1.1 deraadt 676: }
677: }
678:
679: void
1.104 djm 680: rsource(char *name, struct stat *statp)
1.1 deraadt 681: {
682: DIR *dirp;
683: struct dirent *dp;
684: char *last, *vect[1], path[1100];
685:
686: if (!(dirp = opendir(name))) {
687: run_err("%s: %s", name, strerror(errno));
688: return;
689: }
690: last = strrchr(name, '/');
691: if (last == 0)
692: last = name;
693: else
694: last++;
695: if (pflag) {
1.55 deraadt 696: (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n",
1.47 markus 697: (u_long) statp->st_mtime,
698: (u_long) statp->st_atime);
1.107 deraadt 699: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 700: if (response() < 0) {
701: closedir(dirp);
702: return;
703: }
704: }
1.55 deraadt 705: (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n",
1.47 markus 706: (u_int) (statp->st_mode & FILEMODEMASK), 0, last);
1.18 markus 707: if (verbose_mode)
708: fprintf(stderr, "Entering directory: %s", path);
1.107 deraadt 709: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 710: if (response() < 0) {
711: closedir(dirp);
712: return;
713: }
1.63 stevesk 714: while ((dp = readdir(dirp)) != NULL) {
1.1 deraadt 715: if (dp->d_ino == 0)
716: continue;
717: if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
718: continue;
719: if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) {
720: run_err("%s/%s: name too long", name, dp->d_name);
721: continue;
722: }
1.55 deraadt 723: (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name);
1.1 deraadt 724: vect[0] = path;
725: source(1, vect);
726: }
1.18 markus 727: (void) closedir(dirp);
1.107 deraadt 728: (void) atomicio(vwrite, remout, "E\n", 2);
1.18 markus 729: (void) response();
1.1 deraadt 730: }
731:
732: void
1.99 markus 733: bwlimit(int amount)
734: {
735: static struct timeval bwstart, bwend;
736: static int lamt, thresh = 16384;
1.115 avsm 737: u_int64_t waitlen;
1.99 markus 738: struct timespec ts, rm;
739:
740: if (!timerisset(&bwstart)) {
741: gettimeofday(&bwstart, NULL);
742: return;
743: }
744:
745: lamt += amount;
746: if (lamt < thresh)
747: return;
748:
749: gettimeofday(&bwend, NULL);
750: timersub(&bwend, &bwstart, &bwend);
751: if (!timerisset(&bwend))
752: return;
753:
754: lamt *= 8;
1.115 avsm 755: waitlen = (double)1000000L * lamt / limit_rate;
1.99 markus 756:
1.115 avsm 757: bwstart.tv_sec = waitlen / 1000000L;
758: bwstart.tv_usec = waitlen % 1000000L;
1.99 markus 759:
760: if (timercmp(&bwstart, &bwend, >)) {
761: timersub(&bwstart, &bwend, &bwend);
762:
763: /* Adjust the wait time */
764: if (bwend.tv_sec) {
765: thresh /= 2;
766: if (thresh < 2048)
767: thresh = 2048;
768: } else if (bwend.tv_usec < 100) {
769: thresh *= 2;
770: if (thresh > 32768)
771: thresh = 32768;
772: }
773:
774: TIMEVAL_TO_TIMESPEC(&bwend, &ts);
775: while (nanosleep(&ts, &rm) == -1) {
776: if (errno != EINTR)
777: break;
778: ts = rm;
779: }
780: }
781:
782: lamt = 0;
783: gettimeofday(&bwstart, NULL);
784: }
785:
786: void
1.104 djm 787: sink(int argc, char **argv)
1.1 deraadt 788: {
789: static BUF buffer;
790: struct stat stb;
1.18 markus 791: enum {
792: YES, NO, DISPLAYED
793: } wrerr;
1.1 deraadt 794: BUF *bp;
1.122 avsm 795: off_t i;
1.124 djm 796: size_t j, count;
1.140 deraadt 797: int amt, exists, first, ofd;
798: mode_t mode, omode, mask;
1.97 fgsch 799: off_t size, statbytes;
1.36 deraadt 800: int setimes, targisdir, wrerrno = 0;
1.1 deraadt 801: char ch, *cp, *np, *targ, *why, *vect[1], buf[2048];
1.40 markus 802: struct timeval tv[2];
1.1 deraadt 803:
1.66 stevesk 804: #define atime tv[0]
805: #define mtime tv[1]
1.118 deraadt 806: #define SCREWUP(str) { why = str; goto screwup; }
1.1 deraadt 807:
808: setimes = targisdir = 0;
809: mask = umask(0);
810: if (!pflag)
1.18 markus 811: (void) umask(mask);
1.1 deraadt 812: if (argc != 1) {
813: run_err("ambiguous target");
814: exit(1);
815: }
816: targ = *argv;
817: if (targetshouldbedirectory)
818: verifydir(targ);
1.18 markus 819:
1.107 deraadt 820: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 821: if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
822: targisdir = 1;
823: for (first = 1;; first = 0) {
824: cp = buf;
1.122 avsm 825: if (atomicio(read, remin, cp, 1) != 1)
1.1 deraadt 826: return;
827: if (*cp++ == '\n')
828: SCREWUP("unexpected <newline>");
829: do {
1.30 deraadt 830: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 831: SCREWUP("lost connection");
832: *cp++ = ch;
833: } while (cp < &buf[sizeof(buf) - 1] && ch != '\n');
834: *cp = 0;
1.114 markus 835: if (verbose_mode)
836: fprintf(stderr, "Sink: %s", buf);
1.1 deraadt 837:
838: if (buf[0] == '\01' || buf[0] == '\02') {
839: if (iamremote == 0)
1.107 deraadt 840: (void) atomicio(vwrite, STDERR_FILENO,
1.44 deraadt 841: buf + 1, strlen(buf + 1));
1.1 deraadt 842: if (buf[0] == '\02')
843: exit(1);
844: ++errs;
845: continue;
846: }
847: if (buf[0] == 'E') {
1.107 deraadt 848: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 849: return;
850: }
851: if (ch == '\n')
852: *--cp = 0;
853:
854: cp = buf;
855: if (*cp == 'T') {
856: setimes++;
857: cp++;
1.66 stevesk 858: mtime.tv_sec = strtol(cp, &cp, 10);
859: if (!cp || *cp++ != ' ')
1.1 deraadt 860: SCREWUP("mtime.sec not delimited");
1.66 stevesk 861: mtime.tv_usec = strtol(cp, &cp, 10);
862: if (!cp || *cp++ != ' ')
1.1 deraadt 863: SCREWUP("mtime.usec not delimited");
1.66 stevesk 864: atime.tv_sec = strtol(cp, &cp, 10);
865: if (!cp || *cp++ != ' ')
1.1 deraadt 866: SCREWUP("atime.sec not delimited");
1.66 stevesk 867: atime.tv_usec = strtol(cp, &cp, 10);
868: if (!cp || *cp++ != '\0')
1.1 deraadt 869: SCREWUP("atime.usec not delimited");
1.107 deraadt 870: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 871: continue;
872: }
873: if (*cp != 'C' && *cp != 'D') {
874: /*
875: * Check for the case "rcp remote:foo\* local:bar".
876: * In this case, the line "No match." can be returned
877: * by the shell before the rcp command on the remote is
878: * executed so the ^Aerror_message convention isn't
879: * followed.
880: */
881: if (first) {
882: run_err("%s", cp);
883: exit(1);
884: }
885: SCREWUP("expected control record");
886: }
887: mode = 0;
888: for (++cp; cp < buf + 5; cp++) {
889: if (*cp < '0' || *cp > '7')
890: SCREWUP("bad mode");
891: mode = (mode << 3) | (*cp - '0');
892: }
893: if (*cp++ != ' ')
894: SCREWUP("mode not delimited");
895:
1.63 stevesk 896: for (size = 0; isdigit(*cp);)
1.1 deraadt 897: size = size * 10 + (*cp++ - '0');
898: if (*cp++ != ' ')
899: SCREWUP("size not delimited");
1.114 markus 900: if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) {
901: run_err("error: unexpected filename: %s", cp);
902: exit(1);
903: }
1.1 deraadt 904: if (targisdir) {
905: static char *namebuf;
1.124 djm 906: static size_t cursize;
1.1 deraadt 907: size_t need;
908:
909: need = strlen(targ) + strlen(cp) + 250;
1.55 deraadt 910: if (need > cursize) {
1.58 danh 911: if (namebuf)
912: xfree(namebuf);
1.18 markus 913: namebuf = xmalloc(need);
1.55 deraadt 914: cursize = need;
915: }
916: (void) snprintf(namebuf, need, "%s%s%s", targ,
1.88 mouring 917: strcmp(targ, "/") ? "/" : "", cp);
1.1 deraadt 918: np = namebuf;
919: } else
920: np = targ;
1.12 aaron 921: curfile = cp;
1.1 deraadt 922: exists = stat(np, &stb) == 0;
923: if (buf[0] == 'D') {
924: int mod_flag = pflag;
1.114 markus 925: if (!iamrecursive)
926: SCREWUP("received directory without -r");
1.1 deraadt 927: if (exists) {
928: if (!S_ISDIR(stb.st_mode)) {
929: errno = ENOTDIR;
930: goto bad;
931: }
932: if (pflag)
1.18 markus 933: (void) chmod(np, mode);
1.1 deraadt 934: } else {
1.18 markus 935: /* Handle copying from a read-only
936: directory */
1.1 deraadt 937: mod_flag = 1;
938: if (mkdir(np, mode | S_IRWXU) < 0)
939: goto bad;
940: }
1.58 danh 941: vect[0] = xstrdup(np);
1.1 deraadt 942: sink(1, vect);
943: if (setimes) {
944: setimes = 0;
1.59 deraadt 945: if (utimes(vect[0], tv) < 0)
1.18 markus 946: run_err("%s: set times: %s",
1.59 deraadt 947: vect[0], strerror(errno));
1.1 deraadt 948: }
949: if (mod_flag)
1.59 deraadt 950: (void) chmod(vect[0], mode);
951: if (vect[0])
952: xfree(vect[0]);
1.1 deraadt 953: continue;
954: }
955: omode = mode;
956: mode |= S_IWRITE;
1.71 markus 957: if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
1.1 deraadt 958: bad: run_err("%s: %s", np, strerror(errno));
959: continue;
960: }
1.107 deraadt 961: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 962: if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) {
1.18 markus 963: (void) close(ofd);
1.1 deraadt 964: continue;
965: }
966: cp = bp->buf;
967: wrerr = NO;
1.7 deraadt 968:
1.12 aaron 969: statbytes = 0;
1.97 fgsch 970: if (showprogress)
971: start_progress_meter(curfile, size, &statbytes);
1.1 deraadt 972: for (count = i = 0; i < size; i += 4096) {
973: amt = 4096;
974: if (i + amt > size)
975: amt = size - i;
976: count += amt;
977: do {
1.117 avsm 978: j = atomicio(read, remin, cp, amt);
1.122 avsm 979: if (j == 0) {
1.1 deraadt 980: run_err("%s", j ? strerror(errno) :
1.63 stevesk 981: "dropped connection");
1.1 deraadt 982: exit(1);
983: }
984: amt -= j;
985: cp += j;
1.18 markus 986: statbytes += j;
1.1 deraadt 987: } while (amt > 0);
1.112 djm 988:
1.113 djm 989: if (limit_rate)
1.99 markus 990: bwlimit(4096);
991:
1.1 deraadt 992: if (count == bp->cnt) {
993: /* Keep reading so we stay sync'd up. */
994: if (wrerr == NO) {
1.122 avsm 995: if (atomicio(vwrite, ofd, bp->buf,
996: count) != count) {
1.1 deraadt 997: wrerr = YES;
1.122 avsm 998: wrerrno = errno;
1.1 deraadt 999: }
1000: }
1001: count = 0;
1002: cp = bp->buf;
1003: }
1004: }
1.7 deraadt 1005: if (showprogress)
1.97 fgsch 1006: stop_progress_meter();
1.1 deraadt 1007: if (count != 0 && wrerr == NO &&
1.122 avsm 1008: atomicio(vwrite, ofd, bp->buf, count) != count) {
1.1 deraadt 1009: wrerr = YES;
1.122 avsm 1010: wrerrno = errno;
1.1 deraadt 1011: }
1.98 djm 1012: if (wrerr == NO && ftruncate(ofd, size) != 0) {
1.1 deraadt 1013: run_err("%s: truncate: %s", np, strerror(errno));
1014: wrerr = DISPLAYED;
1015: }
1016: if (pflag) {
1017: if (exists || omode != mode)
1.116 dtucker 1018: if (fchmod(ofd, omode)) {
1.1 deraadt 1019: run_err("%s: set mode: %s",
1.63 stevesk 1020: np, strerror(errno));
1.116 dtucker 1021: wrerr = DISPLAYED;
1022: }
1.1 deraadt 1023: } else {
1024: if (!exists && omode != mode)
1.116 dtucker 1025: if (fchmod(ofd, omode & ~mask)) {
1.1 deraadt 1026: run_err("%s: set mode: %s",
1.63 stevesk 1027: np, strerror(errno));
1.116 dtucker 1028: wrerr = DISPLAYED;
1029: }
1.1 deraadt 1030: }
1.33 provos 1031: if (close(ofd) == -1) {
1032: wrerr = YES;
1033: wrerrno = errno;
1034: }
1.18 markus 1035: (void) response();
1.1 deraadt 1036: if (setimes && wrerr == NO) {
1037: setimes = 0;
1.40 markus 1038: if (utimes(np, tv) < 0) {
1.1 deraadt 1039: run_err("%s: set times: %s",
1.63 stevesk 1040: np, strerror(errno));
1.1 deraadt 1041: wrerr = DISPLAYED;
1042: }
1043: }
1.18 markus 1044: switch (wrerr) {
1.1 deraadt 1045: case YES:
1046: run_err("%s: %s", np, strerror(wrerrno));
1047: break;
1048: case NO:
1.107 deraadt 1049: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 1050: break;
1051: case DISPLAYED:
1052: break;
1053: }
1054: }
1055: screwup:
1056: run_err("protocol error: %s", why);
1057: exit(1);
1058: }
1059:
1060: int
1.86 itojun 1061: response(void)
1.1 deraadt 1062: {
1063: char ch, *cp, resp, rbuf[2048];
1064:
1.30 deraadt 1065: if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp))
1.1 deraadt 1066: lostconn(0);
1067:
1068: cp = rbuf;
1.18 markus 1069: switch (resp) {
1070: case 0: /* ok */
1.1 deraadt 1071: return (0);
1072: default:
1073: *cp++ = resp;
1074: /* FALLTHROUGH */
1.18 markus 1075: case 1: /* error, followed by error msg */
1076: case 2: /* fatal error, "" */
1.1 deraadt 1077: do {
1.30 deraadt 1078: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 1079: lostconn(0);
1080: *cp++ = ch;
1081: } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
1082:
1083: if (!iamremote)
1.107 deraadt 1084: (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf);
1.1 deraadt 1085: ++errs;
1086: if (resp == 1)
1087: return (-1);
1088: exit(1);
1089: }
1090: /* NOTREACHED */
1091: }
1092:
1093: void
1.86 itojun 1094: usage(void)
1.1 deraadt 1095: {
1.83 stevesk 1096: (void) fprintf(stderr,
1.110 jmc 1097: "usage: scp [-1246BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n"
1098: " [-l limit] [-o ssh_option] [-P port] [-S program]\n"
1.90 deraadt 1099: " [[user@]host1:]file1 [...] [[user@]host2:]file2\n");
1.1 deraadt 1100: exit(1);
1101: }
1102:
1103: void
1.18 markus 1104: run_err(const char *fmt,...)
1.1 deraadt 1105: {
1106: static FILE *fp;
1107: va_list ap;
1108:
1109: ++errs;
1.136 biorn 1110: if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) {
1111: (void) fprintf(fp, "%c", 0x01);
1112: (void) fprintf(fp, "scp: ");
1113: va_start(ap, fmt);
1114: (void) vfprintf(fp, fmt, ap);
1115: va_end(ap);
1116: (void) fprintf(fp, "\n");
1117: (void) fflush(fp);
1118: }
1.18 markus 1119:
1120: if (!iamremote) {
1.73 markus 1121: va_start(ap, fmt);
1.18 markus 1122: vfprintf(stderr, fmt, ap);
1.73 markus 1123: va_end(ap);
1.18 markus 1124: fprintf(stderr, "\n");
1125: }
1.1 deraadt 1126: }
1127:
1128: void
1.104 djm 1129: verifydir(char *cp)
1.1 deraadt 1130: {
1131: struct stat stb;
1132:
1133: if (!stat(cp, &stb)) {
1134: if (S_ISDIR(stb.st_mode))
1135: return;
1136: errno = ENOTDIR;
1137: }
1138: run_err("%s: %s", cp, strerror(errno));
1.123 avsm 1139: killchild(0);
1.1 deraadt 1140: }
1141:
1142: int
1.104 djm 1143: okname(char *cp0)
1.1 deraadt 1144: {
1145: int c;
1146: char *cp;
1147:
1148: cp = cp0;
1149: do {
1.75 deraadt 1150: c = (int)*cp;
1.1 deraadt 1151: if (c & 0200)
1152: goto bad;
1.101 markus 1153: if (!isalpha(c) && !isdigit(c)) {
1154: switch (c) {
1155: case '\'':
1156: case '"':
1157: case '`':
1158: case ' ':
1159: case '#':
1160: goto bad;
1161: default:
1162: break;
1163: }
1164: }
1.1 deraadt 1165: } while (*++cp);
1166: return (1);
1167:
1.25 markus 1168: bad: fprintf(stderr, "%s: invalid user name\n", cp0);
1.1 deraadt 1169: return (0);
1170: }
1171:
1172: BUF *
1.104 djm 1173: allocbuf(BUF *bp, int fd, int blksize)
1.1 deraadt 1174: {
1175: size_t size;
1176: struct stat stb;
1177:
1178: if (fstat(fd, &stb) < 0) {
1179: run_err("fstat: %s", strerror(errno));
1180: return (0);
1181: }
1.95 markus 1182: size = roundup(stb.st_blksize, blksize);
1183: if (size == 0)
1.18 markus 1184: size = blksize;
1.1 deraadt 1185: if (bp->cnt >= size)
1186: return (bp);
1.18 markus 1187: if (bp->buf == NULL)
1188: bp->buf = xmalloc(size);
1189: else
1.138 djm 1190: bp->buf = xrealloc(bp->buf, 1, size);
1.81 markus 1191: memset(bp->buf, 0, size);
1.1 deraadt 1192: bp->cnt = size;
1193: return (bp);
1194: }
1195:
1196: void
1.104 djm 1197: lostconn(int signo)
1.1 deraadt 1198: {
1199: if (!iamremote)
1.74 markus 1200: write(STDERR_FILENO, "lost connection\n", 16);
1201: if (signo)
1202: _exit(1);
1203: else
1204: exit(1);
1.4 aaron 1205: }
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