Annotation of src/usr.bin/ssh/scp.c, Revision 1.103
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"
1.103 ! millert 74: RCSID("$OpenBSD: scp.c,v 1.102 2003/03/05 22:33:43 markus 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 */
91: off_t limit = 0;
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 */
106: pid_t do_cmd_pid;
107:
1.20 markus 108: /*
109: * This function executes the given command as the specified user on the
110: * given host. This returns < 0 if execution fails, and >= 0 otherwise. This
111: * assigns the input and output file descriptors on success.
112: */
1.1 deraadt 113:
1.27 markus 114: int
1.35 deraadt 115: do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout, int argc)
1.1 deraadt 116: {
1.18 markus 117: int pin[2], pout[2], reserved[2];
118:
119: if (verbose_mode)
1.78 deraadt 120: fprintf(stderr,
121: "Executing: program %s host %s, user %s, command %s\n",
122: ssh_program, host,
123: remuser ? remuser : "(unspecified)", cmd);
1.18 markus 124:
1.20 markus 125: /*
126: * Reserve two descriptors so that the real pipes won't get
127: * descriptors 0 and 1 because that will screw up dup2 below.
128: */
1.18 markus 129: pipe(reserved);
130:
131: /* Create a socket pair for communicating with ssh. */
132: if (pipe(pin) < 0)
133: fatal("pipe: %s", strerror(errno));
134: if (pipe(pout) < 0)
135: fatal("pipe: %s", strerror(errno));
136:
137: /* Free the reserved descriptors. */
138: close(reserved[0]);
139: close(reserved[1]);
140:
141: /* For a child to execute the command on the remote host using ssh. */
1.92 markus 142: do_cmd_pid = fork();
143: if (do_cmd_pid == 0) {
1.18 markus 144: /* Child. */
145: close(pin[1]);
146: close(pout[0]);
147: dup2(pin[0], 0);
148: dup2(pout[1], 1);
149: close(pin[0]);
150: close(pout[1]);
151:
1.41 markus 152: args.list[0] = ssh_program;
153: if (remuser != NULL)
1.70 mouring 154: addargs(&args, "-l%s", remuser);
155: addargs(&args, "%s", host);
156: addargs(&args, "%s", cmd);
1.18 markus 157:
1.41 markus 158: execvp(ssh_program, args.list);
1.34 deraadt 159: perror(ssh_program);
1.18 markus 160: exit(1);
1.92 markus 161: } else if (do_cmd_pid == -1) {
162: fatal("fork: %s", strerror(errno));
1.18 markus 163: }
164: /* Parent. Close the other side, and return the local side. */
165: close(pin[0]);
166: *fdout = pin[1];
167: close(pout[1]);
168: *fdin = pout[0];
169: return 0;
1.1 deraadt 170: }
171:
172: typedef struct {
173: int cnt;
174: char *buf;
175: } BUF;
176:
1.18 markus 177: BUF *allocbuf(BUF *, int, int);
178: void lostconn(int);
179: void nospace(void);
180: int okname(char *);
181: void run_err(const char *,...);
182: void verifydir(char *);
1.1 deraadt 183:
184: struct passwd *pwd;
1.18 markus 185: uid_t userid;
1.1 deraadt 186: int errs, remin, remout;
187: int pflag, iamremote, iamrecursive, targetshouldbedirectory;
188:
189: #define CMDNEEDS 64
190: char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
191:
1.18 markus 192: int response(void);
193: void rsource(char *, struct stat *);
194: void sink(int, char *[]);
195: void source(int, char *[]);
196: void tolocal(int, char *[]);
197: void toremote(char *, int, char *[]);
198: void usage(void);
1.1 deraadt 199:
200: int
201: main(argc, argv)
202: int argc;
203: char *argv[];
204: {
1.92 markus 205: int ch, fflag, tflag, status;
1.99 markus 206: double speed;
207: char *targ, *endp;
1.1 deraadt 208: extern char *optarg;
209: extern int optind;
210:
1.41 markus 211: args.list = NULL;
1.91 deraadt 212: addargs(&args, "ssh"); /* overwritten with ssh_program */
1.70 mouring 213: addargs(&args, "-x");
1.82 stevesk 214: addargs(&args, "-oForwardAgent no");
1.84 stevesk 215: addargs(&args, "-oClearAllForwardings yes");
1.41 markus 216:
1.1 deraadt 217: fflag = tflag = 0;
1.100 markus 218: while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q1246S:o:F:")) != -1)
1.18 markus 219: switch (ch) {
220: /* User-visible flags. */
1.100 markus 221: case '1':
222: case '2':
1.23 markus 223: case '4':
1.41 markus 224: case '6':
225: case 'C':
1.70 mouring 226: addargs(&args, "-%c", ch);
1.41 markus 227: break;
228: case 'o':
229: case 'c':
230: case 'i':
1.83 stevesk 231: case 'F':
1.70 mouring 232: addargs(&args, "-%c%s", ch, optarg);
1.23 markus 233: break;
1.41 markus 234: case 'P':
1.70 mouring 235: addargs(&args, "-p%s", optarg);
1.41 markus 236: break;
237: case 'B':
1.70 mouring 238: addargs(&args, "-oBatchmode yes");
1.23 markus 239: break;
1.99 markus 240: case 'l':
241: speed = strtod(optarg, &endp);
242: if (speed <= 0 || *endp != '\0')
243: usage();
244: limit = speed * 1024;
245: break;
1.1 deraadt 246: case 'p':
247: pflag = 1;
248: break;
249: case 'r':
250: iamrecursive = 1;
251: break;
1.34 deraadt 252: case 'S':
1.41 markus 253: ssh_program = xstrdup(optarg);
254: break;
255: case 'v':
1.72 markus 256: addargs(&args, "-v");
1.41 markus 257: verbose_mode = 1;
258: break;
259: case 'q':
260: showprogress = 0;
1.34 deraadt 261: break;
262:
1.18 markus 263: /* Server options. */
1.1 deraadt 264: case 'd':
265: targetshouldbedirectory = 1;
266: break;
1.18 markus 267: case 'f': /* "from" */
1.1 deraadt 268: iamremote = 1;
269: fflag = 1;
270: break;
1.18 markus 271: case 't': /* "to" */
1.1 deraadt 272: iamremote = 1;
273: tflag = 1;
274: break;
275: default:
276: usage();
277: }
278: argc -= optind;
279: argv += optind;
280:
281: if ((pwd = getpwuid(userid = getuid())) == NULL)
1.18 markus 282: fatal("unknown user %d", (int) userid);
1.1 deraadt 283:
1.18 markus 284: if (!isatty(STDERR_FILENO))
1.7 deraadt 285: showprogress = 0;
286:
1.1 deraadt 287: remin = STDIN_FILENO;
288: remout = STDOUT_FILENO;
289:
1.52 stevesk 290: if (fflag) {
1.18 markus 291: /* Follow "protocol", send data. */
292: (void) response();
1.1 deraadt 293: source(argc, argv);
294: exit(errs != 0);
295: }
1.18 markus 296: if (tflag) {
297: /* Receive data. */
1.1 deraadt 298: sink(argc, argv);
299: exit(errs != 0);
300: }
301: if (argc < 2)
302: usage();
303: if (argc > 2)
304: targetshouldbedirectory = 1;
305:
306: remin = remout = -1;
1.92 markus 307: do_cmd_pid = -1;
1.1 deraadt 308: /* Command to be executed on remote system using "ssh". */
1.55 deraadt 309: (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
310: verbose_mode ? " -v" : "",
1.35 deraadt 311: iamrecursive ? " -r" : "", pflag ? " -p" : "",
312: targetshouldbedirectory ? " -d" : "");
1.1 deraadt 313:
1.18 markus 314: (void) signal(SIGPIPE, lostconn);
1.1 deraadt 315:
316: if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */
317: toremote(targ, argc, argv);
318: else {
1.18 markus 319: tolocal(argc, argv); /* Dest is local host. */
1.1 deraadt 320: if (targetshouldbedirectory)
321: verifydir(argv[argc - 1]);
1.92 markus 322: }
323: /*
324: * Finally check the exit status of the ssh process, if one was forked
325: * and no error has occured yet
326: */
327: if (do_cmd_pid != -1 && errs == 0) {
328: if (remin != -1)
329: (void) close(remin);
330: if (remout != -1)
331: (void) close(remout);
332: if (waitpid(do_cmd_pid, &status, 0) == -1)
333: errs = 1;
334: else {
335: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
336: errs = 1;
337: }
1.1 deraadt 338: }
339: exit(errs != 0);
340: }
341:
342: void
343: toremote(targ, argc, argv)
344: char *targ, *argv[];
345: int argc;
346: {
347: int i, len;
348: char *bp, *host, *src, *suser, *thost, *tuser;
349:
350: *targ++ = 0;
351: if (*targ == 0)
352: targ = ".";
353:
1.94 markus 354: if ((thost = strrchr(argv[argc - 1], '@'))) {
1.1 deraadt 355: /* user@host */
356: *thost++ = 0;
357: tuser = argv[argc - 1];
358: if (*tuser == '\0')
359: tuser = NULL;
360: } else {
361: thost = argv[argc - 1];
362: tuser = NULL;
363: }
364:
365: for (i = 0; i < argc - 1; i++) {
366: src = colon(argv[i]);
1.18 markus 367: if (src) { /* remote to remote */
1.84 stevesk 368: static char *ssh_options =
1.89 markus 369: "-x -o'ClearAllForwardings yes'";
1.1 deraadt 370: *src++ = 0;
371: if (*src == 0)
372: src = ".";
1.94 markus 373: host = strrchr(argv[i], '@');
1.34 deraadt 374: len = strlen(ssh_program) + strlen(argv[i]) +
1.35 deraadt 375: strlen(src) + (tuser ? strlen(tuser) : 0) +
1.84 stevesk 376: strlen(thost) + strlen(targ) +
377: strlen(ssh_options) + CMDNEEDS + 20;
1.18 markus 378: bp = xmalloc(len);
1.1 deraadt 379: if (host) {
380: *host++ = 0;
1.23 markus 381: host = cleanhostname(host);
1.1 deraadt 382: suser = argv[i];
383: if (*suser == '\0')
384: suser = pwd->pw_name;
1.102 markus 385: else if (!okname(suser)) {
386: xfree(bp);
1.1 deraadt 387: continue;
1.102 markus 388: }
389: if (tuser && !okname(tuser)) {
390: xfree(bp);
1.101 markus 391: continue;
1.102 markus 392: }
1.55 deraadt 393: snprintf(bp, len,
1.84 stevesk 394: "%s%s %s -n "
1.55 deraadt 395: "-l %s %s %s %s '%s%s%s:%s'",
1.44 deraadt 396: ssh_program, verbose_mode ? " -v" : "",
1.84 stevesk 397: ssh_options, suser, host, cmd, src,
1.44 deraadt 398: tuser ? tuser : "", tuser ? "@" : "",
399: thost, targ);
1.23 markus 400: } else {
401: host = cleanhostname(argv[i]);
1.55 deraadt 402: snprintf(bp, len,
1.84 stevesk 403: "exec %s%s %s -n %s "
1.55 deraadt 404: "%s %s '%s%s%s:%s'",
1.44 deraadt 405: ssh_program, verbose_mode ? " -v" : "",
1.84 stevesk 406: ssh_options, host, cmd, src,
1.44 deraadt 407: tuser ? tuser : "", tuser ? "@" : "",
408: thost, targ);
1.23 markus 409: }
1.18 markus 410: if (verbose_mode)
411: fprintf(stderr, "Executing: %s\n", bp);
412: (void) system(bp);
413: (void) xfree(bp);
414: } else { /* local to remote */
1.1 deraadt 415: if (remin == -1) {
416: len = strlen(targ) + CMDNEEDS + 20;
1.18 markus 417: bp = xmalloc(len);
1.55 deraadt 418: (void) snprintf(bp, len, "%s -t %s", cmd, targ);
1.23 markus 419: host = cleanhostname(thost);
1.35 deraadt 420: if (do_cmd(host, tuser, bp, &remin,
421: &remout, argc) < 0)
1.18 markus 422: exit(1);
1.1 deraadt 423: if (response() < 0)
424: exit(1);
1.18 markus 425: (void) xfree(bp);
1.1 deraadt 426: }
1.18 markus 427: source(1, argv + i);
1.1 deraadt 428: }
429: }
430: }
431:
432: void
433: tolocal(argc, argv)
434: int argc;
435: char *argv[];
436: {
437: int i, len;
438: char *bp, *host, *src, *suser;
439:
440: for (i = 0; i < argc - 1; i++) {
1.18 markus 441: if (!(src = colon(argv[i]))) { /* Local to local. */
1.1 deraadt 442: len = strlen(_PATH_CP) + strlen(argv[i]) +
1.35 deraadt 443: strlen(argv[argc - 1]) + 20;
1.1 deraadt 444: bp = xmalloc(len);
1.55 deraadt 445: (void) snprintf(bp, len, "exec %s%s%s %s %s", _PATH_CP,
1.35 deraadt 446: iamrecursive ? " -r" : "", pflag ? " -p" : "",
447: argv[i], argv[argc - 1]);
1.18 markus 448: if (verbose_mode)
449: fprintf(stderr, "Executing: %s\n", bp);
1.1 deraadt 450: if (system(bp))
451: ++errs;
1.18 markus 452: (void) xfree(bp);
1.1 deraadt 453: continue;
454: }
455: *src++ = 0;
456: if (*src == 0)
457: src = ".";
1.94 markus 458: if ((host = strrchr(argv[i], '@')) == NULL) {
1.1 deraadt 459: host = argv[i];
460: suser = NULL;
461: } else {
462: *host++ = 0;
463: suser = argv[i];
464: if (*suser == '\0')
465: suser = pwd->pw_name;
466: }
1.23 markus 467: host = cleanhostname(host);
1.1 deraadt 468: len = strlen(src) + CMDNEEDS + 20;
1.18 markus 469: bp = xmalloc(len);
1.55 deraadt 470: (void) snprintf(bp, len, "%s -f %s", cmd, src);
1.35 deraadt 471: if (do_cmd(host, suser, bp, &remin, &remout, argc) < 0) {
1.18 markus 472: (void) xfree(bp);
473: ++errs;
474: continue;
1.1 deraadt 475: }
1.18 markus 476: xfree(bp);
1.1 deraadt 477: sink(1, argv + argc - 1);
1.18 markus 478: (void) close(remin);
1.1 deraadt 479: remin = remout = -1;
480: }
481: }
482:
483: void
484: source(argc, argv)
485: int argc;
486: char *argv[];
487: {
488: struct stat stb;
489: static BUF buffer;
490: BUF *bp;
1.97 fgsch 491: off_t i, amt, result, statbytes;
1.68 markus 492: int fd, haderr, indx;
1.1 deraadt 493: char *last, *name, buf[2048];
1.65 deraadt 494: int len;
1.1 deraadt 495:
496: for (indx = 0; indx < argc; ++indx) {
1.18 markus 497: name = argv[indx];
1.11 aaron 498: statbytes = 0;
1.65 deraadt 499: len = strlen(name);
500: while (len > 1 && name[len-1] == '/')
501: name[--len] = '\0';
1.85 markus 502: if (strchr(name, '\n') != NULL) {
503: run_err("%s: skipping, filename contains a newline",
504: name);
505: goto next;
506: }
1.1 deraadt 507: if ((fd = open(name, O_RDONLY, 0)) < 0)
508: goto syserr;
509: if (fstat(fd, &stb) < 0) {
510: syserr: run_err("%s: %s", name, strerror(errno));
511: goto next;
512: }
513: switch (stb.st_mode & S_IFMT) {
514: case S_IFREG:
515: break;
516: case S_IFDIR:
517: if (iamrecursive) {
518: rsource(name, &stb);
519: goto next;
520: }
521: /* FALLTHROUGH */
522: default:
523: run_err("%s: not a regular file", name);
524: goto next;
525: }
526: if ((last = strrchr(name, '/')) == NULL)
527: last = name;
528: else
529: ++last;
1.11 aaron 530: curfile = last;
1.1 deraadt 531: if (pflag) {
532: /*
533: * Make it compatible with possible future
534: * versions expecting microseconds.
535: */
1.55 deraadt 536: (void) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n",
1.47 markus 537: (u_long) stb.st_mtime,
538: (u_long) stb.st_atime);
1.29 deraadt 539: (void) atomicio(write, remout, buf, strlen(buf));
1.1 deraadt 540: if (response() < 0)
541: goto next;
542: }
543: #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
1.61 markus 544: snprintf(buf, sizeof buf, "C%04o %lld %s\n",
1.47 markus 545: (u_int) (stb.st_mode & FILEMODEMASK),
1.62 markus 546: (long long)stb.st_size, last);
1.18 markus 547: if (verbose_mode) {
548: fprintf(stderr, "Sending file modes: %s", buf);
549: }
1.29 deraadt 550: (void) atomicio(write, remout, buf, strlen(buf));
1.1 deraadt 551: if (response() < 0)
552: goto next;
553: if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) {
1.18 markus 554: next: (void) close(fd);
1.1 deraadt 555: continue;
556: }
1.97 fgsch 557: if (showprogress)
558: start_progress_meter(curfile, stb.st_size, &statbytes);
1.1 deraadt 559: /* Keep writing after an error so that we stay sync'd up. */
560: for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
561: amt = bp->cnt;
562: if (i + amt > stb.st_size)
563: amt = stb.st_size - i;
564: if (!haderr) {
1.30 deraadt 565: result = atomicio(read, fd, bp->buf, amt);
1.1 deraadt 566: if (result != amt)
567: haderr = result >= 0 ? EIO : errno;
568: }
569: if (haderr)
1.29 deraadt 570: (void) atomicio(write, remout, bp->buf, amt);
1.1 deraadt 571: else {
1.29 deraadt 572: result = atomicio(write, remout, bp->buf, amt);
1.1 deraadt 573: if (result != amt)
574: haderr = result >= 0 ? EIO : errno;
1.4 aaron 575: statbytes += result;
1.1 deraadt 576: }
1.99 markus 577: if (limit)
578: bwlimit(amt);
1.1 deraadt 579: }
1.18 markus 580: if (showprogress)
1.97 fgsch 581: stop_progress_meter();
1.4 aaron 582:
1.1 deraadt 583: if (close(fd) < 0 && !haderr)
584: haderr = errno;
585: if (!haderr)
1.29 deraadt 586: (void) atomicio(write, remout, "", 1);
1.1 deraadt 587: else
588: run_err("%s: %s", name, strerror(haderr));
1.18 markus 589: (void) response();
1.1 deraadt 590: }
591: }
592:
593: void
594: rsource(name, statp)
595: char *name;
596: struct stat *statp;
597: {
598: DIR *dirp;
599: struct dirent *dp;
600: char *last, *vect[1], path[1100];
601:
602: if (!(dirp = opendir(name))) {
603: run_err("%s: %s", name, strerror(errno));
604: return;
605: }
606: last = strrchr(name, '/');
607: if (last == 0)
608: last = name;
609: else
610: last++;
611: if (pflag) {
1.55 deraadt 612: (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n",
1.47 markus 613: (u_long) statp->st_mtime,
614: (u_long) statp->st_atime);
1.29 deraadt 615: (void) atomicio(write, remout, path, strlen(path));
1.1 deraadt 616: if (response() < 0) {
617: closedir(dirp);
618: return;
619: }
620: }
1.55 deraadt 621: (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n",
1.47 markus 622: (u_int) (statp->st_mode & FILEMODEMASK), 0, last);
1.18 markus 623: if (verbose_mode)
624: fprintf(stderr, "Entering directory: %s", path);
1.29 deraadt 625: (void) atomicio(write, remout, path, strlen(path));
1.1 deraadt 626: if (response() < 0) {
627: closedir(dirp);
628: return;
629: }
1.63 stevesk 630: while ((dp = readdir(dirp)) != NULL) {
1.1 deraadt 631: if (dp->d_ino == 0)
632: continue;
633: if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
634: continue;
635: if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) {
636: run_err("%s/%s: name too long", name, dp->d_name);
637: continue;
638: }
1.55 deraadt 639: (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name);
1.1 deraadt 640: vect[0] = path;
641: source(1, vect);
642: }
1.18 markus 643: (void) closedir(dirp);
1.29 deraadt 644: (void) atomicio(write, remout, "E\n", 2);
1.18 markus 645: (void) response();
1.1 deraadt 646: }
647:
648: void
1.99 markus 649: bwlimit(int amount)
650: {
651: static struct timeval bwstart, bwend;
652: static int lamt, thresh = 16384;
653: u_int64_t wait;
654: struct timespec ts, rm;
655:
656: if (!timerisset(&bwstart)) {
657: gettimeofday(&bwstart, NULL);
658: return;
659: }
660:
661: lamt += amount;
662: if (lamt < thresh)
663: return;
664:
665: gettimeofday(&bwend, NULL);
666: timersub(&bwend, &bwstart, &bwend);
667: if (!timerisset(&bwend))
668: return;
669:
670: lamt *= 8;
671: wait = (double)1000000L * lamt / limit;
672:
673: bwstart.tv_sec = wait / 1000000L;
674: bwstart.tv_usec = wait % 1000000L;
675:
676: if (timercmp(&bwstart, &bwend, >)) {
677: timersub(&bwstart, &bwend, &bwend);
678:
679: /* Adjust the wait time */
680: if (bwend.tv_sec) {
681: thresh /= 2;
682: if (thresh < 2048)
683: thresh = 2048;
684: } else if (bwend.tv_usec < 100) {
685: thresh *= 2;
686: if (thresh > 32768)
687: thresh = 32768;
688: }
689:
690: TIMEVAL_TO_TIMESPEC(&bwend, &ts);
691: while (nanosleep(&ts, &rm) == -1) {
692: if (errno != EINTR)
693: break;
694: ts = rm;
695: }
696: }
697:
698: lamt = 0;
699: gettimeofday(&bwstart, NULL);
700: }
701:
702: void
1.1 deraadt 703: sink(argc, argv)
704: int argc;
705: char *argv[];
706: {
707: static BUF buffer;
708: struct stat stb;
1.18 markus 709: enum {
710: YES, NO, DISPLAYED
711: } wrerr;
1.1 deraadt 712: BUF *bp;
713: off_t i, j;
714: int amt, count, exists, first, mask, mode, ofd, omode;
1.97 fgsch 715: off_t size, statbytes;
1.36 deraadt 716: int setimes, targisdir, wrerrno = 0;
1.1 deraadt 717: char ch, *cp, *np, *targ, *why, *vect[1], buf[2048];
1.40 markus 718: struct timeval tv[2];
1.1 deraadt 719:
1.66 stevesk 720: #define atime tv[0]
721: #define mtime tv[1]
1.75 deraadt 722: #define SCREWUP(str) do { why = str; goto screwup; } while (0)
1.1 deraadt 723:
724: setimes = targisdir = 0;
725: mask = umask(0);
726: if (!pflag)
1.18 markus 727: (void) umask(mask);
1.1 deraadt 728: if (argc != 1) {
729: run_err("ambiguous target");
730: exit(1);
731: }
732: targ = *argv;
733: if (targetshouldbedirectory)
734: verifydir(targ);
1.18 markus 735:
1.29 deraadt 736: (void) atomicio(write, remout, "", 1);
1.1 deraadt 737: if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
738: targisdir = 1;
739: for (first = 1;; first = 0) {
740: cp = buf;
1.30 deraadt 741: if (atomicio(read, remin, cp, 1) <= 0)
1.1 deraadt 742: return;
743: if (*cp++ == '\n')
744: SCREWUP("unexpected <newline>");
745: do {
1.30 deraadt 746: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 747: SCREWUP("lost connection");
748: *cp++ = ch;
749: } while (cp < &buf[sizeof(buf) - 1] && ch != '\n');
750: *cp = 0;
751:
752: if (buf[0] == '\01' || buf[0] == '\02') {
753: if (iamremote == 0)
1.29 deraadt 754: (void) atomicio(write, STDERR_FILENO,
1.44 deraadt 755: buf + 1, strlen(buf + 1));
1.1 deraadt 756: if (buf[0] == '\02')
757: exit(1);
758: ++errs;
759: continue;
760: }
761: if (buf[0] == 'E') {
1.29 deraadt 762: (void) atomicio(write, remout, "", 1);
1.1 deraadt 763: return;
764: }
765: if (ch == '\n')
766: *--cp = 0;
767:
768: cp = buf;
769: if (*cp == 'T') {
770: setimes++;
771: cp++;
1.66 stevesk 772: mtime.tv_sec = strtol(cp, &cp, 10);
773: if (!cp || *cp++ != ' ')
1.1 deraadt 774: SCREWUP("mtime.sec not delimited");
1.66 stevesk 775: mtime.tv_usec = strtol(cp, &cp, 10);
776: if (!cp || *cp++ != ' ')
1.1 deraadt 777: SCREWUP("mtime.usec not delimited");
1.66 stevesk 778: atime.tv_sec = strtol(cp, &cp, 10);
779: if (!cp || *cp++ != ' ')
1.1 deraadt 780: SCREWUP("atime.sec not delimited");
1.66 stevesk 781: atime.tv_usec = strtol(cp, &cp, 10);
782: if (!cp || *cp++ != '\0')
1.1 deraadt 783: SCREWUP("atime.usec not delimited");
1.29 deraadt 784: (void) atomicio(write, remout, "", 1);
1.1 deraadt 785: continue;
786: }
787: if (*cp != 'C' && *cp != 'D') {
788: /*
789: * Check for the case "rcp remote:foo\* local:bar".
790: * In this case, the line "No match." can be returned
791: * by the shell before the rcp command on the remote is
792: * executed so the ^Aerror_message convention isn't
793: * followed.
794: */
795: if (first) {
796: run_err("%s", cp);
797: exit(1);
798: }
799: SCREWUP("expected control record");
800: }
801: mode = 0;
802: for (++cp; cp < buf + 5; cp++) {
803: if (*cp < '0' || *cp > '7')
804: SCREWUP("bad mode");
805: mode = (mode << 3) | (*cp - '0');
806: }
807: if (*cp++ != ' ')
808: SCREWUP("mode not delimited");
809:
1.63 stevesk 810: for (size = 0; isdigit(*cp);)
1.1 deraadt 811: size = size * 10 + (*cp++ - '0');
812: if (*cp++ != ' ')
813: SCREWUP("size not delimited");
814: if (targisdir) {
815: static char *namebuf;
816: static int cursize;
817: size_t need;
818:
819: need = strlen(targ) + strlen(cp) + 250;
1.55 deraadt 820: if (need > cursize) {
1.58 danh 821: if (namebuf)
822: xfree(namebuf);
1.18 markus 823: namebuf = xmalloc(need);
1.55 deraadt 824: cursize = need;
825: }
826: (void) snprintf(namebuf, need, "%s%s%s", targ,
1.88 mouring 827: strcmp(targ, "/") ? "/" : "", cp);
1.1 deraadt 828: np = namebuf;
829: } else
830: np = targ;
1.12 aaron 831: curfile = cp;
1.1 deraadt 832: exists = stat(np, &stb) == 0;
833: if (buf[0] == 'D') {
834: int mod_flag = pflag;
835: if (exists) {
836: if (!S_ISDIR(stb.st_mode)) {
837: errno = ENOTDIR;
838: goto bad;
839: }
840: if (pflag)
1.18 markus 841: (void) chmod(np, mode);
1.1 deraadt 842: } else {
1.18 markus 843: /* Handle copying from a read-only
844: directory */
1.1 deraadt 845: mod_flag = 1;
846: if (mkdir(np, mode | S_IRWXU) < 0)
847: goto bad;
848: }
1.58 danh 849: vect[0] = xstrdup(np);
1.1 deraadt 850: sink(1, vect);
851: if (setimes) {
852: setimes = 0;
1.59 deraadt 853: if (utimes(vect[0], tv) < 0)
1.18 markus 854: run_err("%s: set times: %s",
1.59 deraadt 855: vect[0], strerror(errno));
1.1 deraadt 856: }
857: if (mod_flag)
1.59 deraadt 858: (void) chmod(vect[0], mode);
859: if (vect[0])
860: xfree(vect[0]);
1.1 deraadt 861: continue;
862: }
863: omode = mode;
864: mode |= S_IWRITE;
1.71 markus 865: if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
1.1 deraadt 866: bad: run_err("%s: %s", np, strerror(errno));
867: continue;
868: }
1.29 deraadt 869: (void) atomicio(write, remout, "", 1);
1.1 deraadt 870: if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) {
1.18 markus 871: (void) close(ofd);
1.1 deraadt 872: continue;
873: }
874: cp = bp->buf;
875: wrerr = NO;
1.7 deraadt 876:
1.12 aaron 877: statbytes = 0;
1.97 fgsch 878: if (showprogress)
879: start_progress_meter(curfile, size, &statbytes);
1.1 deraadt 880: for (count = i = 0; i < size; i += 4096) {
881: amt = 4096;
882: if (i + amt > size)
883: amt = size - i;
884: count += amt;
885: do {
1.43 markus 886: j = read(remin, cp, amt);
1.78 deraadt 887: if (j == -1 && (errno == EINTR ||
888: errno == EAGAIN)) {
1.43 markus 889: continue;
890: } else if (j <= 0) {
1.1 deraadt 891: run_err("%s", j ? strerror(errno) :
1.63 stevesk 892: "dropped connection");
1.1 deraadt 893: exit(1);
894: }
895: amt -= j;
896: cp += j;
1.18 markus 897: statbytes += j;
1.1 deraadt 898: } while (amt > 0);
1.99 markus 899:
900: if (limit)
901: bwlimit(4096);
902:
1.1 deraadt 903: if (count == bp->cnt) {
904: /* Keep reading so we stay sync'd up. */
905: if (wrerr == NO) {
1.30 deraadt 906: j = atomicio(write, ofd, bp->buf, count);
1.1 deraadt 907: if (j != count) {
908: wrerr = YES;
1.18 markus 909: wrerrno = j >= 0 ? EIO : errno;
1.1 deraadt 910: }
911: }
912: count = 0;
913: cp = bp->buf;
914: }
915: }
1.7 deraadt 916: if (showprogress)
1.97 fgsch 917: stop_progress_meter();
1.1 deraadt 918: if (count != 0 && wrerr == NO &&
1.30 deraadt 919: (j = atomicio(write, ofd, bp->buf, count)) != count) {
1.1 deraadt 920: wrerr = YES;
1.18 markus 921: wrerrno = j >= 0 ? EIO : errno;
1.1 deraadt 922: }
1.98 djm 923: if (wrerr == NO && ftruncate(ofd, size) != 0) {
1.1 deraadt 924: run_err("%s: truncate: %s", np, strerror(errno));
925: wrerr = DISPLAYED;
926: }
927: if (pflag) {
928: if (exists || omode != mode)
929: if (fchmod(ofd, omode))
930: run_err("%s: set mode: %s",
1.63 stevesk 931: np, strerror(errno));
1.1 deraadt 932: } else {
933: if (!exists && omode != mode)
934: if (fchmod(ofd, omode & ~mask))
935: run_err("%s: set mode: %s",
1.63 stevesk 936: np, strerror(errno));
1.1 deraadt 937: }
1.33 provos 938: if (close(ofd) == -1) {
939: wrerr = YES;
940: wrerrno = errno;
941: }
1.18 markus 942: (void) response();
1.1 deraadt 943: if (setimes && wrerr == NO) {
944: setimes = 0;
1.40 markus 945: if (utimes(np, tv) < 0) {
1.1 deraadt 946: run_err("%s: set times: %s",
1.63 stevesk 947: np, strerror(errno));
1.1 deraadt 948: wrerr = DISPLAYED;
949: }
950: }
1.18 markus 951: switch (wrerr) {
1.1 deraadt 952: case YES:
953: run_err("%s: %s", np, strerror(wrerrno));
954: break;
955: case NO:
1.29 deraadt 956: (void) atomicio(write, remout, "", 1);
1.1 deraadt 957: break;
958: case DISPLAYED:
959: break;
960: }
961: }
962: screwup:
963: run_err("protocol error: %s", why);
964: exit(1);
965: }
966:
967: int
1.86 itojun 968: response(void)
1.1 deraadt 969: {
970: char ch, *cp, resp, rbuf[2048];
971:
1.30 deraadt 972: if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp))
1.1 deraadt 973: lostconn(0);
974:
975: cp = rbuf;
1.18 markus 976: switch (resp) {
977: case 0: /* ok */
1.1 deraadt 978: return (0);
979: default:
980: *cp++ = resp;
981: /* FALLTHROUGH */
1.18 markus 982: case 1: /* error, followed by error msg */
983: case 2: /* fatal error, "" */
1.1 deraadt 984: do {
1.30 deraadt 985: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 986: lostconn(0);
987: *cp++ = ch;
988: } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
989:
990: if (!iamremote)
1.29 deraadt 991: (void) atomicio(write, STDERR_FILENO, rbuf, cp - rbuf);
1.1 deraadt 992: ++errs;
993: if (resp == 1)
994: return (-1);
995: exit(1);
996: }
997: /* NOTREACHED */
998: }
999:
1000: void
1.86 itojun 1001: usage(void)
1.1 deraadt 1002: {
1.83 stevesk 1003: (void) fprintf(stderr,
1.100 markus 1004: "usage: scp [-pqrvBC1246] [-F config] [-S program] [-P port]\n"
1.99 markus 1005: " [-c cipher] [-i identity] [-l limit] [-o option]\n"
1.90 deraadt 1006: " [[user@]host1:]file1 [...] [[user@]host2:]file2\n");
1.1 deraadt 1007: exit(1);
1008: }
1009:
1010: void
1.18 markus 1011: run_err(const char *fmt,...)
1.1 deraadt 1012: {
1013: static FILE *fp;
1014: va_list ap;
1015:
1016: ++errs;
1017: if (fp == NULL && !(fp = fdopen(remout, "w")))
1018: return;
1.18 markus 1019: (void) fprintf(fp, "%c", 0x01);
1020: (void) fprintf(fp, "scp: ");
1.73 markus 1021: va_start(ap, fmt);
1.18 markus 1022: (void) vfprintf(fp, fmt, ap);
1.73 markus 1023: va_end(ap);
1.18 markus 1024: (void) fprintf(fp, "\n");
1025: (void) fflush(fp);
1026:
1027: if (!iamremote) {
1.73 markus 1028: va_start(ap, fmt);
1.18 markus 1029: vfprintf(stderr, fmt, ap);
1.73 markus 1030: va_end(ap);
1.18 markus 1031: fprintf(stderr, "\n");
1032: }
1.1 deraadt 1033: }
1034:
1035: void
1036: verifydir(cp)
1037: char *cp;
1038: {
1039: struct stat stb;
1040:
1041: if (!stat(cp, &stb)) {
1042: if (S_ISDIR(stb.st_mode))
1043: return;
1044: errno = ENOTDIR;
1045: }
1046: run_err("%s: %s", cp, strerror(errno));
1047: exit(1);
1048: }
1049:
1050: int
1051: okname(cp0)
1052: char *cp0;
1053: {
1054: int c;
1055: char *cp;
1056:
1057: cp = cp0;
1058: do {
1.75 deraadt 1059: c = (int)*cp;
1.1 deraadt 1060: if (c & 0200)
1061: goto bad;
1.101 markus 1062: if (!isalpha(c) && !isdigit(c)) {
1063: switch (c) {
1064: case '\'':
1065: case '"':
1066: case '`':
1067: case ' ':
1068: case '#':
1069: goto bad;
1070: default:
1071: break;
1072: }
1073: }
1.1 deraadt 1074: } while (*++cp);
1075: return (1);
1076:
1.25 markus 1077: bad: fprintf(stderr, "%s: invalid user name\n", cp0);
1.1 deraadt 1078: return (0);
1079: }
1080:
1081: BUF *
1082: allocbuf(bp, fd, blksize)
1083: BUF *bp;
1084: int fd, blksize;
1085: {
1086: size_t size;
1087: struct stat stb;
1088:
1089: if (fstat(fd, &stb) < 0) {
1090: run_err("fstat: %s", strerror(errno));
1091: return (0);
1092: }
1.95 markus 1093: size = roundup(stb.st_blksize, blksize);
1094: if (size == 0)
1.18 markus 1095: size = blksize;
1.1 deraadt 1096: if (bp->cnt >= size)
1097: return (bp);
1.18 markus 1098: if (bp->buf == NULL)
1099: bp->buf = xmalloc(size);
1100: else
1101: bp->buf = xrealloc(bp->buf, size);
1.81 markus 1102: memset(bp->buf, 0, size);
1.1 deraadt 1103: bp->cnt = size;
1104: return (bp);
1105: }
1106:
1107: void
1108: lostconn(signo)
1109: int signo;
1110: {
1111: if (!iamremote)
1.74 markus 1112: write(STDERR_FILENO, "lost connection\n", 16);
1113: if (signo)
1114: _exit(1);
1115: else
1116: exit(1);
1.4 aaron 1117: }
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