Annotation of src/usr.bin/ssh/scp.c, Revision 1.124
1.1 deraadt 1: /*
1.38 deraadt 2: * scp - secure remote copy. This is basically patched BSD rcp which
3: * uses ssh to do the data transfer (instead of using rcmd).
1.27 markus 4: *
1.38 deraadt 5: * NOTE: This version should NOT be suid root. (This uses ssh to
6: * do the transfer and ssh has the necessary privileges.)
1.27 markus 7: *
1.38 deraadt 8: * 1995 Timo Rinne <tri@iki.fi>, Tatu Ylonen <ylo@cs.hut.fi>
9: *
10: * As far as I am concerned, the code I have written for this software
11: * can be used freely for any purpose. Any derived versions of this
12: * software must be clearly marked as such, and if the derived work is
13: * incompatible with the protocol description in the RFC file, it must be
14: * called by a name other than "ssh" or "Secure Shell".
1.39 markus 15: */
1.38 deraadt 16: /*
1.60 deraadt 17: * Copyright (c) 1999 Theo de Raadt. All rights reserved.
18: * Copyright (c) 1999 Aaron Campbell. All rights reserved.
1.27 markus 19: *
1.38 deraadt 20: * Redistribution and use in source and binary forms, with or without
21: * modification, are permitted provided that the following conditions
22: * are met:
23: * 1. Redistributions of source code must retain the above copyright
24: * notice, this list of conditions and the following disclaimer.
25: * 2. Redistributions in binary form must reproduce the above copyright
26: * notice, this list of conditions and the following disclaimer in the
27: * documentation and/or other materials provided with the distribution.
1.27 markus 28: *
1.38 deraadt 29: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
30: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
31: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
32: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
33: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
34: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
38: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39: */
1.1 deraadt 40:
41: /*
1.35 deraadt 42: * Parts from:
43: *
1.1 deraadt 44: * Copyright (c) 1983, 1990, 1992, 1993, 1995
45: * The Regents of the University of California. All rights reserved.
46: *
47: * Redistribution and use in source and binary forms, with or without
48: * modification, are permitted provided that the following conditions
49: * are met:
50: * 1. Redistributions of source code must retain the above copyright
51: * notice, this list of conditions and the following disclaimer.
52: * 2. Redistributions in binary form must reproduce the above copyright
53: * notice, this list of conditions and the following disclaimer in the
54: * documentation and/or other materials provided with the distribution.
1.103 millert 55: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 56: * may be used to endorse or promote products derived from this software
57: * without specific prior written permission.
58: *
59: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
60: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
61: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
62: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
63: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
64: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
65: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
66: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
67: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
68: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
69: * SUCH DAMAGE.
70: *
71: */
72:
73: #include "includes.h"
1.124 ! djm 74: RCSID("$OpenBSD: scp.c,v 1.123 2005/05/26 02:08:05 avsm Exp $");
1.1 deraadt 75:
76: #include "xmalloc.h"
1.51 markus 77: #include "atomicio.h"
1.50 markus 78: #include "pathnames.h"
1.51 markus 79: #include "log.h"
1.69 mouring 80: #include "misc.h"
1.97 fgsch 81: #include "progressmeter.h"
1.1 deraadt 82:
1.35 deraadt 83: int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout, int argc);
1.11 aaron 84:
1.99 markus 85: void bwlimit(int);
86:
1.70 mouring 87: /* Struct for addargs */
88: arglist args;
1.41 markus 89:
1.99 markus 90: /* Bandwidth limit */
1.113 djm 91: off_t limit_rate = 0;
1.99 markus 92:
1.11 aaron 93: /* Name of current file being transferred. */
94: char *curfile;
1.4 aaron 95:
1.1 deraadt 96: /* This is set to non-zero to enable verbose mode. */
1.17 markus 97: int verbose_mode = 0;
1.1 deraadt 98:
1.6 aaron 99: /* This is set to zero if the progressmeter is not desired. */
100: int showprogress = 1;
101:
1.34 deraadt 102: /* This is the program to execute for the secured connection. ("ssh" or -S) */
1.50 markus 103: char *ssh_program = _PATH_SSH_PROGRAM;
1.34 deraadt 104:
1.92 markus 105: /* This is used to store the pid of ssh_program */
1.105 djm 106: pid_t do_cmd_pid = -1;
107:
108: static void
109: killchild(int signo)
110: {
1.119 dtucker 111: if (do_cmd_pid > 1) {
1.123 avsm 112: kill(do_cmd_pid, signo ? signo : SIGTERM);
1.119 dtucker 113: waitpid(do_cmd_pid, NULL, 0);
114: }
1.105 djm 115:
1.123 avsm 116: if (signo)
117: _exit(1);
118: exit(1);
1.105 djm 119: }
1.92 markus 120:
1.20 markus 121: /*
122: * This function executes the given command as the specified user on the
123: * given host. This returns < 0 if execution fails, and >= 0 otherwise. This
124: * assigns the input and output file descriptors on success.
125: */
1.1 deraadt 126:
1.27 markus 127: int
1.35 deraadt 128: do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout, int argc)
1.1 deraadt 129: {
1.18 markus 130: int pin[2], pout[2], reserved[2];
131:
132: if (verbose_mode)
1.78 deraadt 133: fprintf(stderr,
134: "Executing: program %s host %s, user %s, command %s\n",
135: ssh_program, host,
136: remuser ? remuser : "(unspecified)", cmd);
1.18 markus 137:
1.20 markus 138: /*
139: * Reserve two descriptors so that the real pipes won't get
140: * descriptors 0 and 1 because that will screw up dup2 below.
141: */
1.18 markus 142: pipe(reserved);
143:
144: /* Create a socket pair for communicating with ssh. */
145: if (pipe(pin) < 0)
146: fatal("pipe: %s", strerror(errno));
147: if (pipe(pout) < 0)
148: fatal("pipe: %s", strerror(errno));
149:
150: /* Free the reserved descriptors. */
151: close(reserved[0]);
152: close(reserved[1]);
153:
1.106 nino 154: /* Fork a child to execute the command on the remote host using ssh. */
1.92 markus 155: do_cmd_pid = fork();
156: if (do_cmd_pid == 0) {
1.18 markus 157: /* Child. */
158: close(pin[1]);
159: close(pout[0]);
160: dup2(pin[0], 0);
161: dup2(pout[1], 1);
162: close(pin[0]);
163: close(pout[1]);
164:
1.41 markus 165: args.list[0] = ssh_program;
166: if (remuser != NULL)
1.70 mouring 167: addargs(&args, "-l%s", remuser);
168: addargs(&args, "%s", host);
169: addargs(&args, "%s", cmd);
1.18 markus 170:
1.41 markus 171: execvp(ssh_program, args.list);
1.34 deraadt 172: perror(ssh_program);
1.18 markus 173: exit(1);
1.92 markus 174: } else if (do_cmd_pid == -1) {
175: fatal("fork: %s", strerror(errno));
1.18 markus 176: }
177: /* Parent. Close the other side, and return the local side. */
178: close(pin[0]);
179: *fdout = pin[1];
180: close(pout[1]);
181: *fdin = pout[0];
1.105 djm 182: signal(SIGTERM, killchild);
183: signal(SIGINT, killchild);
184: signal(SIGHUP, killchild);
1.18 markus 185: return 0;
1.1 deraadt 186: }
187:
188: typedef struct {
1.124 ! djm 189: size_t cnt;
1.1 deraadt 190: char *buf;
191: } BUF;
192:
1.18 markus 193: BUF *allocbuf(BUF *, int, int);
194: void lostconn(int);
195: void nospace(void);
196: int okname(char *);
197: void run_err(const char *,...);
198: void verifydir(char *);
1.1 deraadt 199:
200: struct passwd *pwd;
1.18 markus 201: uid_t userid;
1.1 deraadt 202: int errs, remin, remout;
203: int pflag, iamremote, iamrecursive, targetshouldbedirectory;
204:
205: #define CMDNEEDS 64
206: char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
207:
1.18 markus 208: int response(void);
209: void rsource(char *, struct stat *);
210: void sink(int, char *[]);
211: void source(int, char *[]);
212: void tolocal(int, char *[]);
213: void toremote(char *, int, char *[]);
214: void usage(void);
1.1 deraadt 215:
216: int
1.104 djm 217: main(int argc, char **argv)
1.1 deraadt 218: {
1.92 markus 219: int ch, fflag, tflag, status;
1.99 markus 220: double speed;
221: char *targ, *endp;
1.1 deraadt 222: extern char *optarg;
223: extern int optind;
224:
1.41 markus 225: args.list = NULL;
1.91 deraadt 226: addargs(&args, "ssh"); /* overwritten with ssh_program */
1.70 mouring 227: addargs(&args, "-x");
1.82 stevesk 228: addargs(&args, "-oForwardAgent no");
1.84 stevesk 229: addargs(&args, "-oClearAllForwardings yes");
1.41 markus 230:
1.1 deraadt 231: fflag = tflag = 0;
1.100 markus 232: while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q1246S:o:F:")) != -1)
1.18 markus 233: switch (ch) {
234: /* User-visible flags. */
1.100 markus 235: case '1':
236: case '2':
1.23 markus 237: case '4':
1.41 markus 238: case '6':
239: case 'C':
1.70 mouring 240: addargs(&args, "-%c", ch);
1.41 markus 241: break;
242: case 'o':
243: case 'c':
244: case 'i':
1.83 stevesk 245: case 'F':
1.70 mouring 246: addargs(&args, "-%c%s", ch, optarg);
1.23 markus 247: break;
1.41 markus 248: case 'P':
1.70 mouring 249: addargs(&args, "-p%s", optarg);
1.41 markus 250: break;
251: case 'B':
1.70 mouring 252: addargs(&args, "-oBatchmode yes");
1.23 markus 253: break;
1.99 markus 254: case 'l':
255: speed = strtod(optarg, &endp);
256: if (speed <= 0 || *endp != '\0')
257: usage();
1.113 djm 258: limit_rate = speed * 1024;
1.99 markus 259: break;
1.1 deraadt 260: case 'p':
261: pflag = 1;
262: break;
263: case 'r':
264: iamrecursive = 1;
265: break;
1.34 deraadt 266: case 'S':
1.41 markus 267: ssh_program = xstrdup(optarg);
268: break;
269: case 'v':
1.72 markus 270: addargs(&args, "-v");
1.41 markus 271: verbose_mode = 1;
272: break;
273: case 'q':
1.111 dtucker 274: addargs(&args, "-q");
1.41 markus 275: showprogress = 0;
1.34 deraadt 276: break;
277:
1.18 markus 278: /* Server options. */
1.1 deraadt 279: case 'd':
280: targetshouldbedirectory = 1;
281: break;
1.18 markus 282: case 'f': /* "from" */
1.1 deraadt 283: iamremote = 1;
284: fflag = 1;
285: break;
1.18 markus 286: case 't': /* "to" */
1.1 deraadt 287: iamremote = 1;
288: tflag = 1;
289: break;
290: default:
291: usage();
292: }
293: argc -= optind;
294: argv += optind;
295:
296: if ((pwd = getpwuid(userid = getuid())) == NULL)
1.108 deraadt 297: fatal("unknown user %u", (u_int) userid);
1.1 deraadt 298:
1.18 markus 299: if (!isatty(STDERR_FILENO))
1.7 deraadt 300: showprogress = 0;
301:
1.1 deraadt 302: remin = STDIN_FILENO;
303: remout = STDOUT_FILENO;
304:
1.52 stevesk 305: if (fflag) {
1.18 markus 306: /* Follow "protocol", send data. */
307: (void) response();
1.1 deraadt 308: source(argc, argv);
309: exit(errs != 0);
310: }
1.18 markus 311: if (tflag) {
312: /* Receive data. */
1.1 deraadt 313: sink(argc, argv);
314: exit(errs != 0);
315: }
316: if (argc < 2)
317: usage();
318: if (argc > 2)
319: targetshouldbedirectory = 1;
320:
321: remin = remout = -1;
1.92 markus 322: do_cmd_pid = -1;
1.1 deraadt 323: /* Command to be executed on remote system using "ssh". */
1.55 deraadt 324: (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
325: verbose_mode ? " -v" : "",
1.35 deraadt 326: iamrecursive ? " -r" : "", pflag ? " -p" : "",
327: targetshouldbedirectory ? " -d" : "");
1.1 deraadt 328:
1.18 markus 329: (void) signal(SIGPIPE, lostconn);
1.1 deraadt 330:
331: if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */
332: toremote(targ, argc, argv);
333: else {
1.18 markus 334: tolocal(argc, argv); /* Dest is local host. */
1.1 deraadt 335: if (targetshouldbedirectory)
336: verifydir(argv[argc - 1]);
1.92 markus 337: }
338: /*
339: * Finally check the exit status of the ssh process, if one was forked
340: * and no error has occured yet
341: */
342: if (do_cmd_pid != -1 && errs == 0) {
343: if (remin != -1)
344: (void) close(remin);
345: if (remout != -1)
346: (void) close(remout);
347: if (waitpid(do_cmd_pid, &status, 0) == -1)
348: errs = 1;
349: else {
350: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
351: errs = 1;
352: }
1.1 deraadt 353: }
354: exit(errs != 0);
355: }
356:
357: void
1.104 djm 358: toremote(char *targ, int argc, char **argv)
1.1 deraadt 359: {
360: int i, len;
1.120 deraadt 361: char *bp, *host, *src, *suser, *thost, *tuser, *arg;
1.1 deraadt 362:
363: *targ++ = 0;
364: if (*targ == 0)
365: targ = ".";
366:
1.121 djm 367: arg = xstrdup(argv[argc - 1]);
1.120 deraadt 368: if ((thost = strrchr(arg, '@'))) {
1.1 deraadt 369: /* user@host */
370: *thost++ = 0;
1.120 deraadt 371: tuser = arg;
1.1 deraadt 372: if (*tuser == '\0')
373: tuser = NULL;
374: } else {
1.120 deraadt 375: thost = arg;
1.1 deraadt 376: tuser = NULL;
377: }
378:
379: for (i = 0; i < argc - 1; i++) {
380: src = colon(argv[i]);
1.18 markus 381: if (src) { /* remote to remote */
1.84 stevesk 382: static char *ssh_options =
1.89 markus 383: "-x -o'ClearAllForwardings yes'";
1.1 deraadt 384: *src++ = 0;
385: if (*src == 0)
386: src = ".";
1.94 markus 387: host = strrchr(argv[i], '@');
1.34 deraadt 388: len = strlen(ssh_program) + strlen(argv[i]) +
1.35 deraadt 389: strlen(src) + (tuser ? strlen(tuser) : 0) +
1.84 stevesk 390: strlen(thost) + strlen(targ) +
391: strlen(ssh_options) + CMDNEEDS + 20;
1.18 markus 392: bp = xmalloc(len);
1.1 deraadt 393: if (host) {
394: *host++ = 0;
1.23 markus 395: host = cleanhostname(host);
1.1 deraadt 396: suser = argv[i];
397: if (*suser == '\0')
398: suser = pwd->pw_name;
1.102 markus 399: else if (!okname(suser)) {
400: xfree(bp);
1.1 deraadt 401: continue;
1.102 markus 402: }
403: if (tuser && !okname(tuser)) {
404: xfree(bp);
1.101 markus 405: continue;
1.102 markus 406: }
1.55 deraadt 407: snprintf(bp, len,
1.84 stevesk 408: "%s%s %s -n "
1.55 deraadt 409: "-l %s %s %s %s '%s%s%s:%s'",
1.44 deraadt 410: ssh_program, verbose_mode ? " -v" : "",
1.84 stevesk 411: ssh_options, suser, host, cmd, src,
1.44 deraadt 412: tuser ? tuser : "", tuser ? "@" : "",
413: thost, targ);
1.23 markus 414: } else {
415: host = cleanhostname(argv[i]);
1.55 deraadt 416: snprintf(bp, len,
1.84 stevesk 417: "exec %s%s %s -n %s "
1.55 deraadt 418: "%s %s '%s%s%s:%s'",
1.44 deraadt 419: ssh_program, verbose_mode ? " -v" : "",
1.84 stevesk 420: ssh_options, host, cmd, src,
1.44 deraadt 421: tuser ? tuser : "", tuser ? "@" : "",
422: thost, targ);
1.23 markus 423: }
1.18 markus 424: if (verbose_mode)
425: fprintf(stderr, "Executing: %s\n", bp);
1.109 markus 426: if (system(bp) != 0)
427: errs = 1;
1.18 markus 428: (void) xfree(bp);
429: } else { /* local to remote */
1.1 deraadt 430: if (remin == -1) {
431: len = strlen(targ) + CMDNEEDS + 20;
1.18 markus 432: bp = xmalloc(len);
1.55 deraadt 433: (void) snprintf(bp, len, "%s -t %s", cmd, targ);
1.23 markus 434: host = cleanhostname(thost);
1.35 deraadt 435: if (do_cmd(host, tuser, bp, &remin,
436: &remout, argc) < 0)
1.18 markus 437: exit(1);
1.1 deraadt 438: if (response() < 0)
439: exit(1);
1.18 markus 440: (void) xfree(bp);
1.1 deraadt 441: }
1.18 markus 442: source(1, argv + i);
1.1 deraadt 443: }
444: }
445: }
446:
447: void
1.104 djm 448: tolocal(int argc, char **argv)
1.1 deraadt 449: {
450: int i, len;
451: char *bp, *host, *src, *suser;
452:
453: for (i = 0; i < argc - 1; i++) {
1.18 markus 454: if (!(src = colon(argv[i]))) { /* Local to local. */
1.1 deraadt 455: len = strlen(_PATH_CP) + strlen(argv[i]) +
1.35 deraadt 456: strlen(argv[argc - 1]) + 20;
1.1 deraadt 457: bp = xmalloc(len);
1.55 deraadt 458: (void) snprintf(bp, len, "exec %s%s%s %s %s", _PATH_CP,
1.35 deraadt 459: iamrecursive ? " -r" : "", pflag ? " -p" : "",
460: argv[i], argv[argc - 1]);
1.18 markus 461: if (verbose_mode)
462: fprintf(stderr, "Executing: %s\n", bp);
1.1 deraadt 463: if (system(bp))
464: ++errs;
1.18 markus 465: (void) xfree(bp);
1.1 deraadt 466: continue;
467: }
468: *src++ = 0;
469: if (*src == 0)
470: src = ".";
1.94 markus 471: if ((host = strrchr(argv[i], '@')) == NULL) {
1.1 deraadt 472: host = argv[i];
473: suser = NULL;
474: } else {
475: *host++ = 0;
476: suser = argv[i];
477: if (*suser == '\0')
478: suser = pwd->pw_name;
479: }
1.23 markus 480: host = cleanhostname(host);
1.1 deraadt 481: len = strlen(src) + CMDNEEDS + 20;
1.18 markus 482: bp = xmalloc(len);
1.55 deraadt 483: (void) snprintf(bp, len, "%s -f %s", cmd, src);
1.35 deraadt 484: if (do_cmd(host, suser, bp, &remin, &remout, argc) < 0) {
1.18 markus 485: (void) xfree(bp);
486: ++errs;
487: continue;
1.1 deraadt 488: }
1.18 markus 489: xfree(bp);
1.1 deraadt 490: sink(1, argv + argc - 1);
1.18 markus 491: (void) close(remin);
1.1 deraadt 492: remin = remout = -1;
493: }
494: }
495:
496: void
1.104 djm 497: source(int argc, char **argv)
1.1 deraadt 498: {
499: struct stat stb;
500: static BUF buffer;
501: BUF *bp;
1.122 avsm 502: off_t i, amt, statbytes;
503: size_t result;
1.68 markus 504: int fd, haderr, indx;
1.1 deraadt 505: char *last, *name, buf[2048];
1.65 deraadt 506: int len;
1.1 deraadt 507:
508: for (indx = 0; indx < argc; ++indx) {
1.18 markus 509: name = argv[indx];
1.11 aaron 510: statbytes = 0;
1.65 deraadt 511: len = strlen(name);
512: while (len > 1 && name[len-1] == '/')
513: name[--len] = '\0';
1.85 markus 514: if (strchr(name, '\n') != NULL) {
515: run_err("%s: skipping, filename contains a newline",
516: name);
517: goto next;
518: }
1.1 deraadt 519: if ((fd = open(name, O_RDONLY, 0)) < 0)
520: goto syserr;
521: if (fstat(fd, &stb) < 0) {
522: syserr: run_err("%s: %s", name, strerror(errno));
523: goto next;
524: }
525: switch (stb.st_mode & S_IFMT) {
526: case S_IFREG:
527: break;
528: case S_IFDIR:
529: if (iamrecursive) {
530: rsource(name, &stb);
531: goto next;
532: }
533: /* FALLTHROUGH */
534: default:
535: run_err("%s: not a regular file", name);
536: goto next;
537: }
538: if ((last = strrchr(name, '/')) == NULL)
539: last = name;
540: else
541: ++last;
1.11 aaron 542: curfile = last;
1.1 deraadt 543: if (pflag) {
544: /*
545: * Make it compatible with possible future
546: * versions expecting microseconds.
547: */
1.55 deraadt 548: (void) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n",
1.47 markus 549: (u_long) stb.st_mtime,
550: (u_long) stb.st_atime);
1.107 deraadt 551: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 552: if (response() < 0)
553: goto next;
554: }
555: #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
1.61 markus 556: snprintf(buf, sizeof buf, "C%04o %lld %s\n",
1.47 markus 557: (u_int) (stb.st_mode & FILEMODEMASK),
1.62 markus 558: (long long)stb.st_size, last);
1.18 markus 559: if (verbose_mode) {
560: fprintf(stderr, "Sending file modes: %s", buf);
561: }
1.107 deraadt 562: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 563: if (response() < 0)
564: goto next;
565: if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) {
1.18 markus 566: next: (void) close(fd);
1.1 deraadt 567: continue;
568: }
1.97 fgsch 569: if (showprogress)
570: start_progress_meter(curfile, stb.st_size, &statbytes);
1.1 deraadt 571: /* Keep writing after an error so that we stay sync'd up. */
572: for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
573: amt = bp->cnt;
574: if (i + amt > stb.st_size)
575: amt = stb.st_size - i;
576: if (!haderr) {
1.30 deraadt 577: result = atomicio(read, fd, bp->buf, amt);
1.1 deraadt 578: if (result != amt)
1.122 avsm 579: haderr = errno;
1.1 deraadt 580: }
581: if (haderr)
1.107 deraadt 582: (void) atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 583: else {
1.107 deraadt 584: result = atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 585: if (result != amt)
1.122 avsm 586: haderr = errno;
1.4 aaron 587: statbytes += result;
1.1 deraadt 588: }
1.113 djm 589: if (limit_rate)
1.99 markus 590: bwlimit(amt);
1.1 deraadt 591: }
1.18 markus 592: if (showprogress)
1.97 fgsch 593: stop_progress_meter();
1.4 aaron 594:
1.1 deraadt 595: if (close(fd) < 0 && !haderr)
596: haderr = errno;
597: if (!haderr)
1.107 deraadt 598: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 599: else
600: run_err("%s: %s", name, strerror(haderr));
1.18 markus 601: (void) response();
1.1 deraadt 602: }
603: }
604:
605: void
1.104 djm 606: rsource(char *name, struct stat *statp)
1.1 deraadt 607: {
608: DIR *dirp;
609: struct dirent *dp;
610: char *last, *vect[1], path[1100];
611:
612: if (!(dirp = opendir(name))) {
613: run_err("%s: %s", name, strerror(errno));
614: return;
615: }
616: last = strrchr(name, '/');
617: if (last == 0)
618: last = name;
619: else
620: last++;
621: if (pflag) {
1.55 deraadt 622: (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n",
1.47 markus 623: (u_long) statp->st_mtime,
624: (u_long) statp->st_atime);
1.107 deraadt 625: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 626: if (response() < 0) {
627: closedir(dirp);
628: return;
629: }
630: }
1.55 deraadt 631: (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n",
1.47 markus 632: (u_int) (statp->st_mode & FILEMODEMASK), 0, last);
1.18 markus 633: if (verbose_mode)
634: fprintf(stderr, "Entering directory: %s", path);
1.107 deraadt 635: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 636: if (response() < 0) {
637: closedir(dirp);
638: return;
639: }
1.63 stevesk 640: while ((dp = readdir(dirp)) != NULL) {
1.1 deraadt 641: if (dp->d_ino == 0)
642: continue;
643: if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
644: continue;
645: if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) {
646: run_err("%s/%s: name too long", name, dp->d_name);
647: continue;
648: }
1.55 deraadt 649: (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name);
1.1 deraadt 650: vect[0] = path;
651: source(1, vect);
652: }
1.18 markus 653: (void) closedir(dirp);
1.107 deraadt 654: (void) atomicio(vwrite, remout, "E\n", 2);
1.18 markus 655: (void) response();
1.1 deraadt 656: }
657:
658: void
1.99 markus 659: bwlimit(int amount)
660: {
661: static struct timeval bwstart, bwend;
662: static int lamt, thresh = 16384;
1.115 avsm 663: u_int64_t waitlen;
1.99 markus 664: struct timespec ts, rm;
665:
666: if (!timerisset(&bwstart)) {
667: gettimeofday(&bwstart, NULL);
668: return;
669: }
670:
671: lamt += amount;
672: if (lamt < thresh)
673: return;
674:
675: gettimeofday(&bwend, NULL);
676: timersub(&bwend, &bwstart, &bwend);
677: if (!timerisset(&bwend))
678: return;
679:
680: lamt *= 8;
1.115 avsm 681: waitlen = (double)1000000L * lamt / limit_rate;
1.99 markus 682:
1.115 avsm 683: bwstart.tv_sec = waitlen / 1000000L;
684: bwstart.tv_usec = waitlen % 1000000L;
1.99 markus 685:
686: if (timercmp(&bwstart, &bwend, >)) {
687: timersub(&bwstart, &bwend, &bwend);
688:
689: /* Adjust the wait time */
690: if (bwend.tv_sec) {
691: thresh /= 2;
692: if (thresh < 2048)
693: thresh = 2048;
694: } else if (bwend.tv_usec < 100) {
695: thresh *= 2;
696: if (thresh > 32768)
697: thresh = 32768;
698: }
699:
700: TIMEVAL_TO_TIMESPEC(&bwend, &ts);
701: while (nanosleep(&ts, &rm) == -1) {
702: if (errno != EINTR)
703: break;
704: ts = rm;
705: }
706: }
707:
708: lamt = 0;
709: gettimeofday(&bwstart, NULL);
710: }
711:
712: void
1.104 djm 713: sink(int argc, char **argv)
1.1 deraadt 714: {
715: static BUF buffer;
716: struct stat stb;
1.18 markus 717: enum {
718: YES, NO, DISPLAYED
719: } wrerr;
1.1 deraadt 720: BUF *bp;
1.122 avsm 721: off_t i;
1.124 ! djm 722: size_t j, count;
! 723: int amt, exists, first, mask, mode, ofd, omode;
1.97 fgsch 724: off_t size, statbytes;
1.36 deraadt 725: int setimes, targisdir, wrerrno = 0;
1.1 deraadt 726: char ch, *cp, *np, *targ, *why, *vect[1], buf[2048];
1.40 markus 727: struct timeval tv[2];
1.1 deraadt 728:
1.66 stevesk 729: #define atime tv[0]
730: #define mtime tv[1]
1.118 deraadt 731: #define SCREWUP(str) { why = str; goto screwup; }
1.1 deraadt 732:
733: setimes = targisdir = 0;
734: mask = umask(0);
735: if (!pflag)
1.18 markus 736: (void) umask(mask);
1.1 deraadt 737: if (argc != 1) {
738: run_err("ambiguous target");
739: exit(1);
740: }
741: targ = *argv;
742: if (targetshouldbedirectory)
743: verifydir(targ);
1.18 markus 744:
1.107 deraadt 745: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 746: if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
747: targisdir = 1;
748: for (first = 1;; first = 0) {
749: cp = buf;
1.122 avsm 750: if (atomicio(read, remin, cp, 1) != 1)
1.1 deraadt 751: return;
752: if (*cp++ == '\n')
753: SCREWUP("unexpected <newline>");
754: do {
1.30 deraadt 755: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 756: SCREWUP("lost connection");
757: *cp++ = ch;
758: } while (cp < &buf[sizeof(buf) - 1] && ch != '\n');
759: *cp = 0;
1.114 markus 760: if (verbose_mode)
761: fprintf(stderr, "Sink: %s", buf);
1.1 deraadt 762:
763: if (buf[0] == '\01' || buf[0] == '\02') {
764: if (iamremote == 0)
1.107 deraadt 765: (void) atomicio(vwrite, STDERR_FILENO,
1.44 deraadt 766: buf + 1, strlen(buf + 1));
1.1 deraadt 767: if (buf[0] == '\02')
768: exit(1);
769: ++errs;
770: continue;
771: }
772: if (buf[0] == 'E') {
1.107 deraadt 773: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 774: return;
775: }
776: if (ch == '\n')
777: *--cp = 0;
778:
779: cp = buf;
780: if (*cp == 'T') {
781: setimes++;
782: cp++;
1.66 stevesk 783: mtime.tv_sec = strtol(cp, &cp, 10);
784: if (!cp || *cp++ != ' ')
1.1 deraadt 785: SCREWUP("mtime.sec not delimited");
1.66 stevesk 786: mtime.tv_usec = strtol(cp, &cp, 10);
787: if (!cp || *cp++ != ' ')
1.1 deraadt 788: SCREWUP("mtime.usec not delimited");
1.66 stevesk 789: atime.tv_sec = strtol(cp, &cp, 10);
790: if (!cp || *cp++ != ' ')
1.1 deraadt 791: SCREWUP("atime.sec not delimited");
1.66 stevesk 792: atime.tv_usec = strtol(cp, &cp, 10);
793: if (!cp || *cp++ != '\0')
1.1 deraadt 794: SCREWUP("atime.usec not delimited");
1.107 deraadt 795: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 796: continue;
797: }
798: if (*cp != 'C' && *cp != 'D') {
799: /*
800: * Check for the case "rcp remote:foo\* local:bar".
801: * In this case, the line "No match." can be returned
802: * by the shell before the rcp command on the remote is
803: * executed so the ^Aerror_message convention isn't
804: * followed.
805: */
806: if (first) {
807: run_err("%s", cp);
808: exit(1);
809: }
810: SCREWUP("expected control record");
811: }
812: mode = 0;
813: for (++cp; cp < buf + 5; cp++) {
814: if (*cp < '0' || *cp > '7')
815: SCREWUP("bad mode");
816: mode = (mode << 3) | (*cp - '0');
817: }
818: if (*cp++ != ' ')
819: SCREWUP("mode not delimited");
820:
1.63 stevesk 821: for (size = 0; isdigit(*cp);)
1.1 deraadt 822: size = size * 10 + (*cp++ - '0');
823: if (*cp++ != ' ')
824: SCREWUP("size not delimited");
1.114 markus 825: if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) {
826: run_err("error: unexpected filename: %s", cp);
827: exit(1);
828: }
1.1 deraadt 829: if (targisdir) {
830: static char *namebuf;
1.124 ! djm 831: static size_t cursize;
1.1 deraadt 832: size_t need;
833:
834: need = strlen(targ) + strlen(cp) + 250;
1.55 deraadt 835: if (need > cursize) {
1.58 danh 836: if (namebuf)
837: xfree(namebuf);
1.18 markus 838: namebuf = xmalloc(need);
1.55 deraadt 839: cursize = need;
840: }
841: (void) snprintf(namebuf, need, "%s%s%s", targ,
1.88 mouring 842: strcmp(targ, "/") ? "/" : "", cp);
1.1 deraadt 843: np = namebuf;
844: } else
845: np = targ;
1.12 aaron 846: curfile = cp;
1.1 deraadt 847: exists = stat(np, &stb) == 0;
848: if (buf[0] == 'D') {
849: int mod_flag = pflag;
1.114 markus 850: if (!iamrecursive)
851: SCREWUP("received directory without -r");
1.1 deraadt 852: if (exists) {
853: if (!S_ISDIR(stb.st_mode)) {
854: errno = ENOTDIR;
855: goto bad;
856: }
857: if (pflag)
1.18 markus 858: (void) chmod(np, mode);
1.1 deraadt 859: } else {
1.18 markus 860: /* Handle copying from a read-only
861: directory */
1.1 deraadt 862: mod_flag = 1;
863: if (mkdir(np, mode | S_IRWXU) < 0)
864: goto bad;
865: }
1.58 danh 866: vect[0] = xstrdup(np);
1.1 deraadt 867: sink(1, vect);
868: if (setimes) {
869: setimes = 0;
1.59 deraadt 870: if (utimes(vect[0], tv) < 0)
1.18 markus 871: run_err("%s: set times: %s",
1.59 deraadt 872: vect[0], strerror(errno));
1.1 deraadt 873: }
874: if (mod_flag)
1.59 deraadt 875: (void) chmod(vect[0], mode);
876: if (vect[0])
877: xfree(vect[0]);
1.1 deraadt 878: continue;
879: }
880: omode = mode;
881: mode |= S_IWRITE;
1.71 markus 882: if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
1.1 deraadt 883: bad: run_err("%s: %s", np, strerror(errno));
884: continue;
885: }
1.107 deraadt 886: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 887: if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) {
1.18 markus 888: (void) close(ofd);
1.1 deraadt 889: continue;
890: }
891: cp = bp->buf;
892: wrerr = NO;
1.7 deraadt 893:
1.12 aaron 894: statbytes = 0;
1.97 fgsch 895: if (showprogress)
896: start_progress_meter(curfile, size, &statbytes);
1.1 deraadt 897: for (count = i = 0; i < size; i += 4096) {
898: amt = 4096;
899: if (i + amt > size)
900: amt = size - i;
901: count += amt;
902: do {
1.117 avsm 903: j = atomicio(read, remin, cp, amt);
1.122 avsm 904: if (j == 0) {
1.1 deraadt 905: run_err("%s", j ? strerror(errno) :
1.63 stevesk 906: "dropped connection");
1.1 deraadt 907: exit(1);
908: }
909: amt -= j;
910: cp += j;
1.18 markus 911: statbytes += j;
1.1 deraadt 912: } while (amt > 0);
1.112 djm 913:
1.113 djm 914: if (limit_rate)
1.99 markus 915: bwlimit(4096);
916:
1.1 deraadt 917: if (count == bp->cnt) {
918: /* Keep reading so we stay sync'd up. */
919: if (wrerr == NO) {
1.122 avsm 920: if (atomicio(vwrite, ofd, bp->buf,
921: count) != count) {
1.1 deraadt 922: wrerr = YES;
1.122 avsm 923: wrerrno = errno;
1.1 deraadt 924: }
925: }
926: count = 0;
927: cp = bp->buf;
928: }
929: }
1.7 deraadt 930: if (showprogress)
1.97 fgsch 931: stop_progress_meter();
1.1 deraadt 932: if (count != 0 && wrerr == NO &&
1.122 avsm 933: atomicio(vwrite, ofd, bp->buf, count) != count) {
1.1 deraadt 934: wrerr = YES;
1.122 avsm 935: wrerrno = errno;
1.1 deraadt 936: }
1.98 djm 937: if (wrerr == NO && ftruncate(ofd, size) != 0) {
1.1 deraadt 938: run_err("%s: truncate: %s", np, strerror(errno));
939: wrerr = DISPLAYED;
940: }
941: if (pflag) {
942: if (exists || omode != mode)
1.116 dtucker 943: if (fchmod(ofd, omode)) {
1.1 deraadt 944: run_err("%s: set mode: %s",
1.63 stevesk 945: np, strerror(errno));
1.116 dtucker 946: wrerr = DISPLAYED;
947: }
1.1 deraadt 948: } else {
949: if (!exists && omode != mode)
1.116 dtucker 950: if (fchmod(ofd, omode & ~mask)) {
1.1 deraadt 951: run_err("%s: set mode: %s",
1.63 stevesk 952: np, strerror(errno));
1.116 dtucker 953: wrerr = DISPLAYED;
954: }
1.1 deraadt 955: }
1.33 provos 956: if (close(ofd) == -1) {
957: wrerr = YES;
958: wrerrno = errno;
959: }
1.18 markus 960: (void) response();
1.1 deraadt 961: if (setimes && wrerr == NO) {
962: setimes = 0;
1.40 markus 963: if (utimes(np, tv) < 0) {
1.1 deraadt 964: run_err("%s: set times: %s",
1.63 stevesk 965: np, strerror(errno));
1.1 deraadt 966: wrerr = DISPLAYED;
967: }
968: }
1.18 markus 969: switch (wrerr) {
1.1 deraadt 970: case YES:
971: run_err("%s: %s", np, strerror(wrerrno));
972: break;
973: case NO:
1.107 deraadt 974: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 975: break;
976: case DISPLAYED:
977: break;
978: }
979: }
980: screwup:
981: run_err("protocol error: %s", why);
982: exit(1);
983: }
984:
985: int
1.86 itojun 986: response(void)
1.1 deraadt 987: {
988: char ch, *cp, resp, rbuf[2048];
989:
1.30 deraadt 990: if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp))
1.1 deraadt 991: lostconn(0);
992:
993: cp = rbuf;
1.18 markus 994: switch (resp) {
995: case 0: /* ok */
1.1 deraadt 996: return (0);
997: default:
998: *cp++ = resp;
999: /* FALLTHROUGH */
1.18 markus 1000: case 1: /* error, followed by error msg */
1001: case 2: /* fatal error, "" */
1.1 deraadt 1002: do {
1.30 deraadt 1003: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 1004: lostconn(0);
1005: *cp++ = ch;
1006: } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
1007:
1008: if (!iamremote)
1.107 deraadt 1009: (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf);
1.1 deraadt 1010: ++errs;
1011: if (resp == 1)
1012: return (-1);
1013: exit(1);
1014: }
1015: /* NOTREACHED */
1016: }
1017:
1018: void
1.86 itojun 1019: usage(void)
1.1 deraadt 1020: {
1.83 stevesk 1021: (void) fprintf(stderr,
1.110 jmc 1022: "usage: scp [-1246BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n"
1023: " [-l limit] [-o ssh_option] [-P port] [-S program]\n"
1.90 deraadt 1024: " [[user@]host1:]file1 [...] [[user@]host2:]file2\n");
1.1 deraadt 1025: exit(1);
1026: }
1027:
1028: void
1.18 markus 1029: run_err(const char *fmt,...)
1.1 deraadt 1030: {
1031: static FILE *fp;
1032: va_list ap;
1033:
1034: ++errs;
1035: if (fp == NULL && !(fp = fdopen(remout, "w")))
1036: return;
1.18 markus 1037: (void) fprintf(fp, "%c", 0x01);
1038: (void) fprintf(fp, "scp: ");
1.73 markus 1039: va_start(ap, fmt);
1.18 markus 1040: (void) vfprintf(fp, fmt, ap);
1.73 markus 1041: va_end(ap);
1.18 markus 1042: (void) fprintf(fp, "\n");
1043: (void) fflush(fp);
1044:
1045: if (!iamremote) {
1.73 markus 1046: va_start(ap, fmt);
1.18 markus 1047: vfprintf(stderr, fmt, ap);
1.73 markus 1048: va_end(ap);
1.18 markus 1049: fprintf(stderr, "\n");
1050: }
1.1 deraadt 1051: }
1052:
1053: void
1.104 djm 1054: verifydir(char *cp)
1.1 deraadt 1055: {
1056: struct stat stb;
1057:
1058: if (!stat(cp, &stb)) {
1059: if (S_ISDIR(stb.st_mode))
1060: return;
1061: errno = ENOTDIR;
1062: }
1063: run_err("%s: %s", cp, strerror(errno));
1.123 avsm 1064: killchild(0);
1.1 deraadt 1065: }
1066:
1067: int
1.104 djm 1068: okname(char *cp0)
1.1 deraadt 1069: {
1070: int c;
1071: char *cp;
1072:
1073: cp = cp0;
1074: do {
1.75 deraadt 1075: c = (int)*cp;
1.1 deraadt 1076: if (c & 0200)
1077: goto bad;
1.101 markus 1078: if (!isalpha(c) && !isdigit(c)) {
1079: switch (c) {
1080: case '\'':
1081: case '"':
1082: case '`':
1083: case ' ':
1084: case '#':
1085: goto bad;
1086: default:
1087: break;
1088: }
1089: }
1.1 deraadt 1090: } while (*++cp);
1091: return (1);
1092:
1.25 markus 1093: bad: fprintf(stderr, "%s: invalid user name\n", cp0);
1.1 deraadt 1094: return (0);
1095: }
1096:
1097: BUF *
1.104 djm 1098: allocbuf(BUF *bp, int fd, int blksize)
1.1 deraadt 1099: {
1100: size_t size;
1101: struct stat stb;
1102:
1103: if (fstat(fd, &stb) < 0) {
1104: run_err("fstat: %s", strerror(errno));
1105: return (0);
1106: }
1.95 markus 1107: size = roundup(stb.st_blksize, blksize);
1108: if (size == 0)
1.18 markus 1109: size = blksize;
1.1 deraadt 1110: if (bp->cnt >= size)
1111: return (bp);
1.18 markus 1112: if (bp->buf == NULL)
1113: bp->buf = xmalloc(size);
1114: else
1115: bp->buf = xrealloc(bp->buf, size);
1.81 markus 1116: memset(bp->buf, 0, size);
1.1 deraadt 1117: bp->cnt = size;
1118: return (bp);
1119: }
1120:
1121: void
1.104 djm 1122: lostconn(int signo)
1.1 deraadt 1123: {
1124: if (!iamremote)
1.74 markus 1125: write(STDERR_FILENO, "lost connection\n", 16);
1126: if (signo)
1127: _exit(1);
1128: else
1129: exit(1);
1.4 aaron 1130: }
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