Annotation of src/usr.bin/ssh/scp.c, Revision 1.126
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"
1.126 ! djm 74: RCSID("$OpenBSD: scp.c,v 1.125 2005/07/27 10:39:03 dtucker 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;
1.126 ! djm 224:
! 225: /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
! 226: sanitise_stdfd();
1.1 deraadt 227:
1.41 markus 228: args.list = NULL;
1.91 deraadt 229: addargs(&args, "ssh"); /* overwritten with ssh_program */
1.70 mouring 230: addargs(&args, "-x");
1.82 stevesk 231: addargs(&args, "-oForwardAgent no");
1.84 stevesk 232: addargs(&args, "-oClearAllForwardings yes");
1.41 markus 233:
1.1 deraadt 234: fflag = tflag = 0;
1.100 markus 235: while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q1246S:o:F:")) != -1)
1.18 markus 236: switch (ch) {
237: /* User-visible flags. */
1.100 markus 238: case '1':
239: case '2':
1.23 markus 240: case '4':
1.41 markus 241: case '6':
242: case 'C':
1.70 mouring 243: addargs(&args, "-%c", ch);
1.41 markus 244: break;
245: case 'o':
246: case 'c':
247: case 'i':
1.83 stevesk 248: case 'F':
1.70 mouring 249: addargs(&args, "-%c%s", ch, optarg);
1.23 markus 250: break;
1.41 markus 251: case 'P':
1.70 mouring 252: addargs(&args, "-p%s", optarg);
1.41 markus 253: break;
254: case 'B':
1.70 mouring 255: addargs(&args, "-oBatchmode yes");
1.23 markus 256: break;
1.99 markus 257: case 'l':
258: speed = strtod(optarg, &endp);
259: if (speed <= 0 || *endp != '\0')
260: usage();
1.113 djm 261: limit_rate = speed * 1024;
1.99 markus 262: break;
1.1 deraadt 263: case 'p':
264: pflag = 1;
265: break;
266: case 'r':
267: iamrecursive = 1;
268: break;
1.34 deraadt 269: case 'S':
1.41 markus 270: ssh_program = xstrdup(optarg);
271: break;
272: case 'v':
1.72 markus 273: addargs(&args, "-v");
1.41 markus 274: verbose_mode = 1;
275: break;
276: case 'q':
1.111 dtucker 277: addargs(&args, "-q");
1.41 markus 278: showprogress = 0;
1.34 deraadt 279: break;
280:
1.18 markus 281: /* Server options. */
1.1 deraadt 282: case 'd':
283: targetshouldbedirectory = 1;
284: break;
1.18 markus 285: case 'f': /* "from" */
1.1 deraadt 286: iamremote = 1;
287: fflag = 1;
288: break;
1.18 markus 289: case 't': /* "to" */
1.1 deraadt 290: iamremote = 1;
291: tflag = 1;
292: break;
293: default:
294: usage();
295: }
296: argc -= optind;
297: argv += optind;
298:
299: if ((pwd = getpwuid(userid = getuid())) == NULL)
1.108 deraadt 300: fatal("unknown user %u", (u_int) userid);
1.1 deraadt 301:
1.18 markus 302: if (!isatty(STDERR_FILENO))
1.7 deraadt 303: showprogress = 0;
304:
1.1 deraadt 305: remin = STDIN_FILENO;
306: remout = STDOUT_FILENO;
307:
1.52 stevesk 308: if (fflag) {
1.18 markus 309: /* Follow "protocol", send data. */
310: (void) response();
1.1 deraadt 311: source(argc, argv);
312: exit(errs != 0);
313: }
1.18 markus 314: if (tflag) {
315: /* Receive data. */
1.1 deraadt 316: sink(argc, argv);
317: exit(errs != 0);
318: }
319: if (argc < 2)
320: usage();
321: if (argc > 2)
322: targetshouldbedirectory = 1;
323:
324: remin = remout = -1;
1.92 markus 325: do_cmd_pid = -1;
1.1 deraadt 326: /* Command to be executed on remote system using "ssh". */
1.55 deraadt 327: (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
328: verbose_mode ? " -v" : "",
1.35 deraadt 329: iamrecursive ? " -r" : "", pflag ? " -p" : "",
330: targetshouldbedirectory ? " -d" : "");
1.1 deraadt 331:
1.18 markus 332: (void) signal(SIGPIPE, lostconn);
1.1 deraadt 333:
334: if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */
335: toremote(targ, argc, argv);
336: else {
1.18 markus 337: tolocal(argc, argv); /* Dest is local host. */
1.1 deraadt 338: if (targetshouldbedirectory)
339: verifydir(argv[argc - 1]);
1.92 markus 340: }
341: /*
342: * Finally check the exit status of the ssh process, if one was forked
343: * and no error has occured yet
344: */
345: if (do_cmd_pid != -1 && errs == 0) {
346: if (remin != -1)
347: (void) close(remin);
348: if (remout != -1)
349: (void) close(remout);
350: if (waitpid(do_cmd_pid, &status, 0) == -1)
351: errs = 1;
352: else {
353: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
354: errs = 1;
355: }
1.1 deraadt 356: }
357: exit(errs != 0);
358: }
359:
360: void
1.104 djm 361: toremote(char *targ, int argc, char **argv)
1.1 deraadt 362: {
363: int i, len;
1.120 deraadt 364: char *bp, *host, *src, *suser, *thost, *tuser, *arg;
1.1 deraadt 365:
366: *targ++ = 0;
367: if (*targ == 0)
368: targ = ".";
369:
1.121 djm 370: arg = xstrdup(argv[argc - 1]);
1.120 deraadt 371: if ((thost = strrchr(arg, '@'))) {
1.1 deraadt 372: /* user@host */
373: *thost++ = 0;
1.120 deraadt 374: tuser = arg;
1.1 deraadt 375: if (*tuser == '\0')
376: tuser = NULL;
377: } else {
1.120 deraadt 378: thost = arg;
1.1 deraadt 379: tuser = NULL;
380: }
381:
382: for (i = 0; i < argc - 1; i++) {
383: src = colon(argv[i]);
1.18 markus 384: if (src) { /* remote to remote */
1.84 stevesk 385: static char *ssh_options =
1.89 markus 386: "-x -o'ClearAllForwardings yes'";
1.1 deraadt 387: *src++ = 0;
388: if (*src == 0)
389: src = ".";
1.94 markus 390: host = strrchr(argv[i], '@');
1.34 deraadt 391: len = strlen(ssh_program) + strlen(argv[i]) +
1.35 deraadt 392: strlen(src) + (tuser ? strlen(tuser) : 0) +
1.84 stevesk 393: strlen(thost) + strlen(targ) +
394: strlen(ssh_options) + CMDNEEDS + 20;
1.18 markus 395: bp = xmalloc(len);
1.1 deraadt 396: if (host) {
397: *host++ = 0;
1.23 markus 398: host = cleanhostname(host);
1.1 deraadt 399: suser = argv[i];
400: if (*suser == '\0')
401: suser = pwd->pw_name;
1.102 markus 402: else if (!okname(suser)) {
403: xfree(bp);
1.1 deraadt 404: continue;
1.102 markus 405: }
406: if (tuser && !okname(tuser)) {
407: xfree(bp);
1.101 markus 408: continue;
1.102 markus 409: }
1.55 deraadt 410: snprintf(bp, len,
1.84 stevesk 411: "%s%s %s -n "
1.55 deraadt 412: "-l %s %s %s %s '%s%s%s:%s'",
1.44 deraadt 413: ssh_program, verbose_mode ? " -v" : "",
1.84 stevesk 414: ssh_options, suser, host, cmd, src,
1.44 deraadt 415: tuser ? tuser : "", tuser ? "@" : "",
416: thost, targ);
1.23 markus 417: } else {
418: host = cleanhostname(argv[i]);
1.55 deraadt 419: snprintf(bp, len,
1.84 stevesk 420: "exec %s%s %s -n %s "
1.55 deraadt 421: "%s %s '%s%s%s:%s'",
1.44 deraadt 422: ssh_program, verbose_mode ? " -v" : "",
1.84 stevesk 423: ssh_options, host, cmd, src,
1.44 deraadt 424: tuser ? tuser : "", tuser ? "@" : "",
425: thost, targ);
1.23 markus 426: }
1.18 markus 427: if (verbose_mode)
428: fprintf(stderr, "Executing: %s\n", bp);
1.109 markus 429: if (system(bp) != 0)
430: errs = 1;
1.18 markus 431: (void) xfree(bp);
432: } else { /* local to remote */
1.1 deraadt 433: if (remin == -1) {
434: len = strlen(targ) + CMDNEEDS + 20;
1.18 markus 435: bp = xmalloc(len);
1.55 deraadt 436: (void) snprintf(bp, len, "%s -t %s", cmd, targ);
1.23 markus 437: host = cleanhostname(thost);
1.35 deraadt 438: if (do_cmd(host, tuser, bp, &remin,
439: &remout, argc) < 0)
1.18 markus 440: exit(1);
1.1 deraadt 441: if (response() < 0)
442: exit(1);
1.18 markus 443: (void) xfree(bp);
1.1 deraadt 444: }
1.18 markus 445: source(1, argv + i);
1.1 deraadt 446: }
447: }
448: }
449:
450: void
1.104 djm 451: tolocal(int argc, char **argv)
1.1 deraadt 452: {
453: int i, len;
454: char *bp, *host, *src, *suser;
455:
456: for (i = 0; i < argc - 1; i++) {
1.18 markus 457: if (!(src = colon(argv[i]))) { /* Local to local. */
1.1 deraadt 458: len = strlen(_PATH_CP) + strlen(argv[i]) +
1.35 deraadt 459: strlen(argv[argc - 1]) + 20;
1.1 deraadt 460: bp = xmalloc(len);
1.55 deraadt 461: (void) snprintf(bp, len, "exec %s%s%s %s %s", _PATH_CP,
1.35 deraadt 462: iamrecursive ? " -r" : "", pflag ? " -p" : "",
463: argv[i], argv[argc - 1]);
1.18 markus 464: if (verbose_mode)
465: fprintf(stderr, "Executing: %s\n", bp);
1.1 deraadt 466: if (system(bp))
467: ++errs;
1.18 markus 468: (void) xfree(bp);
1.1 deraadt 469: continue;
470: }
471: *src++ = 0;
472: if (*src == 0)
473: src = ".";
1.94 markus 474: if ((host = strrchr(argv[i], '@')) == NULL) {
1.1 deraadt 475: host = argv[i];
476: suser = NULL;
477: } else {
478: *host++ = 0;
479: suser = argv[i];
480: if (*suser == '\0')
481: suser = pwd->pw_name;
482: }
1.23 markus 483: host = cleanhostname(host);
1.1 deraadt 484: len = strlen(src) + CMDNEEDS + 20;
1.18 markus 485: bp = xmalloc(len);
1.55 deraadt 486: (void) snprintf(bp, len, "%s -f %s", cmd, src);
1.35 deraadt 487: if (do_cmd(host, suser, bp, &remin, &remout, argc) < 0) {
1.18 markus 488: (void) xfree(bp);
489: ++errs;
490: continue;
1.1 deraadt 491: }
1.18 markus 492: xfree(bp);
1.1 deraadt 493: sink(1, argv + argc - 1);
1.18 markus 494: (void) close(remin);
1.1 deraadt 495: remin = remout = -1;
496: }
497: }
498:
499: void
1.104 djm 500: source(int argc, char **argv)
1.1 deraadt 501: {
502: struct stat stb;
503: static BUF buffer;
504: BUF *bp;
1.122 avsm 505: off_t i, amt, statbytes;
506: size_t result;
1.125 dtucker 507: int fd = -1, haderr, indx;
1.1 deraadt 508: char *last, *name, buf[2048];
1.65 deraadt 509: int len;
1.1 deraadt 510:
511: for (indx = 0; indx < argc; ++indx) {
1.18 markus 512: name = argv[indx];
1.11 aaron 513: statbytes = 0;
1.65 deraadt 514: len = strlen(name);
515: while (len > 1 && name[len-1] == '/')
516: name[--len] = '\0';
1.85 markus 517: if (strchr(name, '\n') != NULL) {
518: run_err("%s: skipping, filename contains a newline",
519: name);
520: goto next;
521: }
1.1 deraadt 522: if ((fd = open(name, O_RDONLY, 0)) < 0)
523: goto syserr;
524: if (fstat(fd, &stb) < 0) {
525: syserr: run_err("%s: %s", name, strerror(errno));
526: goto next;
527: }
528: switch (stb.st_mode & S_IFMT) {
529: case S_IFREG:
530: break;
531: case S_IFDIR:
532: if (iamrecursive) {
533: rsource(name, &stb);
534: goto next;
535: }
536: /* FALLTHROUGH */
537: default:
538: run_err("%s: not a regular file", name);
539: goto next;
540: }
541: if ((last = strrchr(name, '/')) == NULL)
542: last = name;
543: else
544: ++last;
1.11 aaron 545: curfile = last;
1.1 deraadt 546: if (pflag) {
547: /*
548: * Make it compatible with possible future
549: * versions expecting microseconds.
550: */
1.55 deraadt 551: (void) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n",
1.47 markus 552: (u_long) stb.st_mtime,
553: (u_long) stb.st_atime);
1.107 deraadt 554: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 555: if (response() < 0)
556: goto next;
557: }
558: #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
1.61 markus 559: snprintf(buf, sizeof buf, "C%04o %lld %s\n",
1.47 markus 560: (u_int) (stb.st_mode & FILEMODEMASK),
1.62 markus 561: (long long)stb.st_size, last);
1.18 markus 562: if (verbose_mode) {
563: fprintf(stderr, "Sending file modes: %s", buf);
564: }
1.107 deraadt 565: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 566: if (response() < 0)
567: goto next;
568: if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) {
1.18 markus 569: next: (void) close(fd);
1.1 deraadt 570: continue;
571: }
1.97 fgsch 572: if (showprogress)
573: start_progress_meter(curfile, stb.st_size, &statbytes);
1.1 deraadt 574: /* Keep writing after an error so that we stay sync'd up. */
575: for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
576: amt = bp->cnt;
577: if (i + amt > stb.st_size)
578: amt = stb.st_size - i;
579: if (!haderr) {
1.30 deraadt 580: result = atomicio(read, fd, bp->buf, amt);
1.1 deraadt 581: if (result != amt)
1.122 avsm 582: haderr = errno;
1.1 deraadt 583: }
584: if (haderr)
1.107 deraadt 585: (void) atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 586: else {
1.107 deraadt 587: result = atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 588: if (result != amt)
1.122 avsm 589: haderr = errno;
1.4 aaron 590: statbytes += result;
1.1 deraadt 591: }
1.113 djm 592: if (limit_rate)
1.99 markus 593: bwlimit(amt);
1.1 deraadt 594: }
1.18 markus 595: if (showprogress)
1.97 fgsch 596: stop_progress_meter();
1.4 aaron 597:
1.1 deraadt 598: if (close(fd) < 0 && !haderr)
599: haderr = errno;
600: if (!haderr)
1.107 deraadt 601: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 602: else
603: run_err("%s: %s", name, strerror(haderr));
1.18 markus 604: (void) response();
1.1 deraadt 605: }
606: }
607:
608: void
1.104 djm 609: rsource(char *name, struct stat *statp)
1.1 deraadt 610: {
611: DIR *dirp;
612: struct dirent *dp;
613: char *last, *vect[1], path[1100];
614:
615: if (!(dirp = opendir(name))) {
616: run_err("%s: %s", name, strerror(errno));
617: return;
618: }
619: last = strrchr(name, '/');
620: if (last == 0)
621: last = name;
622: else
623: last++;
624: if (pflag) {
1.55 deraadt 625: (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n",
1.47 markus 626: (u_long) statp->st_mtime,
627: (u_long) statp->st_atime);
1.107 deraadt 628: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 629: if (response() < 0) {
630: closedir(dirp);
631: return;
632: }
633: }
1.55 deraadt 634: (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n",
1.47 markus 635: (u_int) (statp->st_mode & FILEMODEMASK), 0, last);
1.18 markus 636: if (verbose_mode)
637: fprintf(stderr, "Entering directory: %s", path);
1.107 deraadt 638: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 639: if (response() < 0) {
640: closedir(dirp);
641: return;
642: }
1.63 stevesk 643: while ((dp = readdir(dirp)) != NULL) {
1.1 deraadt 644: if (dp->d_ino == 0)
645: continue;
646: if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
647: continue;
648: if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) {
649: run_err("%s/%s: name too long", name, dp->d_name);
650: continue;
651: }
1.55 deraadt 652: (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name);
1.1 deraadt 653: vect[0] = path;
654: source(1, vect);
655: }
1.18 markus 656: (void) closedir(dirp);
1.107 deraadt 657: (void) atomicio(vwrite, remout, "E\n", 2);
1.18 markus 658: (void) response();
1.1 deraadt 659: }
660:
661: void
1.99 markus 662: bwlimit(int amount)
663: {
664: static struct timeval bwstart, bwend;
665: static int lamt, thresh = 16384;
1.115 avsm 666: u_int64_t waitlen;
1.99 markus 667: struct timespec ts, rm;
668:
669: if (!timerisset(&bwstart)) {
670: gettimeofday(&bwstart, NULL);
671: return;
672: }
673:
674: lamt += amount;
675: if (lamt < thresh)
676: return;
677:
678: gettimeofday(&bwend, NULL);
679: timersub(&bwend, &bwstart, &bwend);
680: if (!timerisset(&bwend))
681: return;
682:
683: lamt *= 8;
1.115 avsm 684: waitlen = (double)1000000L * lamt / limit_rate;
1.99 markus 685:
1.115 avsm 686: bwstart.tv_sec = waitlen / 1000000L;
687: bwstart.tv_usec = waitlen % 1000000L;
1.99 markus 688:
689: if (timercmp(&bwstart, &bwend, >)) {
690: timersub(&bwstart, &bwend, &bwend);
691:
692: /* Adjust the wait time */
693: if (bwend.tv_sec) {
694: thresh /= 2;
695: if (thresh < 2048)
696: thresh = 2048;
697: } else if (bwend.tv_usec < 100) {
698: thresh *= 2;
699: if (thresh > 32768)
700: thresh = 32768;
701: }
702:
703: TIMEVAL_TO_TIMESPEC(&bwend, &ts);
704: while (nanosleep(&ts, &rm) == -1) {
705: if (errno != EINTR)
706: break;
707: ts = rm;
708: }
709: }
710:
711: lamt = 0;
712: gettimeofday(&bwstart, NULL);
713: }
714:
715: void
1.104 djm 716: sink(int argc, char **argv)
1.1 deraadt 717: {
718: static BUF buffer;
719: struct stat stb;
1.18 markus 720: enum {
721: YES, NO, DISPLAYED
722: } wrerr;
1.1 deraadt 723: BUF *bp;
1.122 avsm 724: off_t i;
1.124 djm 725: size_t j, count;
726: int amt, exists, first, mask, mode, ofd, omode;
1.97 fgsch 727: off_t size, statbytes;
1.36 deraadt 728: int setimes, targisdir, wrerrno = 0;
1.1 deraadt 729: char ch, *cp, *np, *targ, *why, *vect[1], buf[2048];
1.40 markus 730: struct timeval tv[2];
1.1 deraadt 731:
1.66 stevesk 732: #define atime tv[0]
733: #define mtime tv[1]
1.118 deraadt 734: #define SCREWUP(str) { why = str; goto screwup; }
1.1 deraadt 735:
736: setimes = targisdir = 0;
737: mask = umask(0);
738: if (!pflag)
1.18 markus 739: (void) umask(mask);
1.1 deraadt 740: if (argc != 1) {
741: run_err("ambiguous target");
742: exit(1);
743: }
744: targ = *argv;
745: if (targetshouldbedirectory)
746: verifydir(targ);
1.18 markus 747:
1.107 deraadt 748: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 749: if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
750: targisdir = 1;
751: for (first = 1;; first = 0) {
752: cp = buf;
1.122 avsm 753: if (atomicio(read, remin, cp, 1) != 1)
1.1 deraadt 754: return;
755: if (*cp++ == '\n')
756: SCREWUP("unexpected <newline>");
757: do {
1.30 deraadt 758: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 759: SCREWUP("lost connection");
760: *cp++ = ch;
761: } while (cp < &buf[sizeof(buf) - 1] && ch != '\n');
762: *cp = 0;
1.114 markus 763: if (verbose_mode)
764: fprintf(stderr, "Sink: %s", buf);
1.1 deraadt 765:
766: if (buf[0] == '\01' || buf[0] == '\02') {
767: if (iamremote == 0)
1.107 deraadt 768: (void) atomicio(vwrite, STDERR_FILENO,
1.44 deraadt 769: buf + 1, strlen(buf + 1));
1.1 deraadt 770: if (buf[0] == '\02')
771: exit(1);
772: ++errs;
773: continue;
774: }
775: if (buf[0] == 'E') {
1.107 deraadt 776: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 777: return;
778: }
779: if (ch == '\n')
780: *--cp = 0;
781:
782: cp = buf;
783: if (*cp == 'T') {
784: setimes++;
785: cp++;
1.66 stevesk 786: mtime.tv_sec = strtol(cp, &cp, 10);
787: if (!cp || *cp++ != ' ')
1.1 deraadt 788: SCREWUP("mtime.sec not delimited");
1.66 stevesk 789: mtime.tv_usec = strtol(cp, &cp, 10);
790: if (!cp || *cp++ != ' ')
1.1 deraadt 791: SCREWUP("mtime.usec not delimited");
1.66 stevesk 792: atime.tv_sec = strtol(cp, &cp, 10);
793: if (!cp || *cp++ != ' ')
1.1 deraadt 794: SCREWUP("atime.sec not delimited");
1.66 stevesk 795: atime.tv_usec = strtol(cp, &cp, 10);
796: if (!cp || *cp++ != '\0')
1.1 deraadt 797: SCREWUP("atime.usec not delimited");
1.107 deraadt 798: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 799: continue;
800: }
801: if (*cp != 'C' && *cp != 'D') {
802: /*
803: * Check for the case "rcp remote:foo\* local:bar".
804: * In this case, the line "No match." can be returned
805: * by the shell before the rcp command on the remote is
806: * executed so the ^Aerror_message convention isn't
807: * followed.
808: */
809: if (first) {
810: run_err("%s", cp);
811: exit(1);
812: }
813: SCREWUP("expected control record");
814: }
815: mode = 0;
816: for (++cp; cp < buf + 5; cp++) {
817: if (*cp < '0' || *cp > '7')
818: SCREWUP("bad mode");
819: mode = (mode << 3) | (*cp - '0');
820: }
821: if (*cp++ != ' ')
822: SCREWUP("mode not delimited");
823:
1.63 stevesk 824: for (size = 0; isdigit(*cp);)
1.1 deraadt 825: size = size * 10 + (*cp++ - '0');
826: if (*cp++ != ' ')
827: SCREWUP("size not delimited");
1.114 markus 828: if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) {
829: run_err("error: unexpected filename: %s", cp);
830: exit(1);
831: }
1.1 deraadt 832: if (targisdir) {
833: static char *namebuf;
1.124 djm 834: static size_t cursize;
1.1 deraadt 835: size_t need;
836:
837: need = strlen(targ) + strlen(cp) + 250;
1.55 deraadt 838: if (need > cursize) {
1.58 danh 839: if (namebuf)
840: xfree(namebuf);
1.18 markus 841: namebuf = xmalloc(need);
1.55 deraadt 842: cursize = need;
843: }
844: (void) snprintf(namebuf, need, "%s%s%s", targ,
1.88 mouring 845: strcmp(targ, "/") ? "/" : "", cp);
1.1 deraadt 846: np = namebuf;
847: } else
848: np = targ;
1.12 aaron 849: curfile = cp;
1.1 deraadt 850: exists = stat(np, &stb) == 0;
851: if (buf[0] == 'D') {
852: int mod_flag = pflag;
1.114 markus 853: if (!iamrecursive)
854: SCREWUP("received directory without -r");
1.1 deraadt 855: if (exists) {
856: if (!S_ISDIR(stb.st_mode)) {
857: errno = ENOTDIR;
858: goto bad;
859: }
860: if (pflag)
1.18 markus 861: (void) chmod(np, mode);
1.1 deraadt 862: } else {
1.18 markus 863: /* Handle copying from a read-only
864: directory */
1.1 deraadt 865: mod_flag = 1;
866: if (mkdir(np, mode | S_IRWXU) < 0)
867: goto bad;
868: }
1.58 danh 869: vect[0] = xstrdup(np);
1.1 deraadt 870: sink(1, vect);
871: if (setimes) {
872: setimes = 0;
1.59 deraadt 873: if (utimes(vect[0], tv) < 0)
1.18 markus 874: run_err("%s: set times: %s",
1.59 deraadt 875: vect[0], strerror(errno));
1.1 deraadt 876: }
877: if (mod_flag)
1.59 deraadt 878: (void) chmod(vect[0], mode);
879: if (vect[0])
880: xfree(vect[0]);
1.1 deraadt 881: continue;
882: }
883: omode = mode;
884: mode |= S_IWRITE;
1.71 markus 885: if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
1.1 deraadt 886: bad: run_err("%s: %s", np, strerror(errno));
887: continue;
888: }
1.107 deraadt 889: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 890: if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) {
1.18 markus 891: (void) close(ofd);
1.1 deraadt 892: continue;
893: }
894: cp = bp->buf;
895: wrerr = NO;
1.7 deraadt 896:
1.12 aaron 897: statbytes = 0;
1.97 fgsch 898: if (showprogress)
899: start_progress_meter(curfile, size, &statbytes);
1.1 deraadt 900: for (count = i = 0; i < size; i += 4096) {
901: amt = 4096;
902: if (i + amt > size)
903: amt = size - i;
904: count += amt;
905: do {
1.117 avsm 906: j = atomicio(read, remin, cp, amt);
1.122 avsm 907: if (j == 0) {
1.1 deraadt 908: run_err("%s", j ? strerror(errno) :
1.63 stevesk 909: "dropped connection");
1.1 deraadt 910: exit(1);
911: }
912: amt -= j;
913: cp += j;
1.18 markus 914: statbytes += j;
1.1 deraadt 915: } while (amt > 0);
1.112 djm 916:
1.113 djm 917: if (limit_rate)
1.99 markus 918: bwlimit(4096);
919:
1.1 deraadt 920: if (count == bp->cnt) {
921: /* Keep reading so we stay sync'd up. */
922: if (wrerr == NO) {
1.122 avsm 923: if (atomicio(vwrite, ofd, bp->buf,
924: count) != count) {
1.1 deraadt 925: wrerr = YES;
1.122 avsm 926: wrerrno = errno;
1.1 deraadt 927: }
928: }
929: count = 0;
930: cp = bp->buf;
931: }
932: }
1.7 deraadt 933: if (showprogress)
1.97 fgsch 934: stop_progress_meter();
1.1 deraadt 935: if (count != 0 && wrerr == NO &&
1.122 avsm 936: atomicio(vwrite, ofd, bp->buf, count) != count) {
1.1 deraadt 937: wrerr = YES;
1.122 avsm 938: wrerrno = errno;
1.1 deraadt 939: }
1.98 djm 940: if (wrerr == NO && ftruncate(ofd, size) != 0) {
1.1 deraadt 941: run_err("%s: truncate: %s", np, strerror(errno));
942: wrerr = DISPLAYED;
943: }
944: if (pflag) {
945: if (exists || omode != mode)
1.116 dtucker 946: if (fchmod(ofd, omode)) {
1.1 deraadt 947: run_err("%s: set mode: %s",
1.63 stevesk 948: np, strerror(errno));
1.116 dtucker 949: wrerr = DISPLAYED;
950: }
1.1 deraadt 951: } else {
952: if (!exists && omode != mode)
1.116 dtucker 953: if (fchmod(ofd, omode & ~mask)) {
1.1 deraadt 954: run_err("%s: set mode: %s",
1.63 stevesk 955: np, strerror(errno));
1.116 dtucker 956: wrerr = DISPLAYED;
957: }
1.1 deraadt 958: }
1.33 provos 959: if (close(ofd) == -1) {
960: wrerr = YES;
961: wrerrno = errno;
962: }
1.18 markus 963: (void) response();
1.1 deraadt 964: if (setimes && wrerr == NO) {
965: setimes = 0;
1.40 markus 966: if (utimes(np, tv) < 0) {
1.1 deraadt 967: run_err("%s: set times: %s",
1.63 stevesk 968: np, strerror(errno));
1.1 deraadt 969: wrerr = DISPLAYED;
970: }
971: }
1.18 markus 972: switch (wrerr) {
1.1 deraadt 973: case YES:
974: run_err("%s: %s", np, strerror(wrerrno));
975: break;
976: case NO:
1.107 deraadt 977: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 978: break;
979: case DISPLAYED:
980: break;
981: }
982: }
983: screwup:
984: run_err("protocol error: %s", why);
985: exit(1);
986: }
987:
988: int
1.86 itojun 989: response(void)
1.1 deraadt 990: {
991: char ch, *cp, resp, rbuf[2048];
992:
1.30 deraadt 993: if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp))
1.1 deraadt 994: lostconn(0);
995:
996: cp = rbuf;
1.18 markus 997: switch (resp) {
998: case 0: /* ok */
1.1 deraadt 999: return (0);
1000: default:
1001: *cp++ = resp;
1002: /* FALLTHROUGH */
1.18 markus 1003: case 1: /* error, followed by error msg */
1004: case 2: /* fatal error, "" */
1.1 deraadt 1005: do {
1.30 deraadt 1006: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 1007: lostconn(0);
1008: *cp++ = ch;
1009: } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
1010:
1011: if (!iamremote)
1.107 deraadt 1012: (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf);
1.1 deraadt 1013: ++errs;
1014: if (resp == 1)
1015: return (-1);
1016: exit(1);
1017: }
1018: /* NOTREACHED */
1019: }
1020:
1021: void
1.86 itojun 1022: usage(void)
1.1 deraadt 1023: {
1.83 stevesk 1024: (void) fprintf(stderr,
1.110 jmc 1025: "usage: scp [-1246BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n"
1026: " [-l limit] [-o ssh_option] [-P port] [-S program]\n"
1.90 deraadt 1027: " [[user@]host1:]file1 [...] [[user@]host2:]file2\n");
1.1 deraadt 1028: exit(1);
1029: }
1030:
1031: void
1.18 markus 1032: run_err(const char *fmt,...)
1.1 deraadt 1033: {
1034: static FILE *fp;
1035: va_list ap;
1036:
1037: ++errs;
1038: if (fp == NULL && !(fp = fdopen(remout, "w")))
1039: return;
1.18 markus 1040: (void) fprintf(fp, "%c", 0x01);
1041: (void) fprintf(fp, "scp: ");
1.73 markus 1042: va_start(ap, fmt);
1.18 markus 1043: (void) vfprintf(fp, fmt, ap);
1.73 markus 1044: va_end(ap);
1.18 markus 1045: (void) fprintf(fp, "\n");
1046: (void) fflush(fp);
1047:
1048: if (!iamremote) {
1.73 markus 1049: va_start(ap, fmt);
1.18 markus 1050: vfprintf(stderr, fmt, ap);
1.73 markus 1051: va_end(ap);
1.18 markus 1052: fprintf(stderr, "\n");
1053: }
1.1 deraadt 1054: }
1055:
1056: void
1.104 djm 1057: verifydir(char *cp)
1.1 deraadt 1058: {
1059: struct stat stb;
1060:
1061: if (!stat(cp, &stb)) {
1062: if (S_ISDIR(stb.st_mode))
1063: return;
1064: errno = ENOTDIR;
1065: }
1066: run_err("%s: %s", cp, strerror(errno));
1.123 avsm 1067: killchild(0);
1.1 deraadt 1068: }
1069:
1070: int
1.104 djm 1071: okname(char *cp0)
1.1 deraadt 1072: {
1073: int c;
1074: char *cp;
1075:
1076: cp = cp0;
1077: do {
1.75 deraadt 1078: c = (int)*cp;
1.1 deraadt 1079: if (c & 0200)
1080: goto bad;
1.101 markus 1081: if (!isalpha(c) && !isdigit(c)) {
1082: switch (c) {
1083: case '\'':
1084: case '"':
1085: case '`':
1086: case ' ':
1087: case '#':
1088: goto bad;
1089: default:
1090: break;
1091: }
1092: }
1.1 deraadt 1093: } while (*++cp);
1094: return (1);
1095:
1.25 markus 1096: bad: fprintf(stderr, "%s: invalid user name\n", cp0);
1.1 deraadt 1097: return (0);
1098: }
1099:
1100: BUF *
1.104 djm 1101: allocbuf(BUF *bp, int fd, int blksize)
1.1 deraadt 1102: {
1103: size_t size;
1104: struct stat stb;
1105:
1106: if (fstat(fd, &stb) < 0) {
1107: run_err("fstat: %s", strerror(errno));
1108: return (0);
1109: }
1.95 markus 1110: size = roundup(stb.st_blksize, blksize);
1111: if (size == 0)
1.18 markus 1112: size = blksize;
1.1 deraadt 1113: if (bp->cnt >= size)
1114: return (bp);
1.18 markus 1115: if (bp->buf == NULL)
1116: bp->buf = xmalloc(size);
1117: else
1118: bp->buf = xrealloc(bp->buf, size);
1.81 markus 1119: memset(bp->buf, 0, size);
1.1 deraadt 1120: bp->cnt = size;
1121: return (bp);
1122: }
1123:
1124: void
1.104 djm 1125: lostconn(int signo)
1.1 deraadt 1126: {
1127: if (!iamremote)
1.74 markus 1128: write(STDERR_FILENO, "lost connection\n", 16);
1129: if (signo)
1130: _exit(1);
1131: else
1132: exit(1);
1.4 aaron 1133: }
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