Annotation of src/usr.bin/ssh/scp.c, Revision 1.120
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"
1.120 ! deraadt 74: RCSID("$OpenBSD: scp.c,v 1.119 2005/01/24 10:22:06 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) {
1.105 djm 112: kill(do_cmd_pid, signo);
1.119 dtucker 113: waitpid(do_cmd_pid, NULL, 0);
114: }
1.105 djm 115:
116: _exit(1);
117: }
1.92 markus 118:
1.20 markus 119: /*
120: * This function executes the given command as the specified user on the
121: * given host. This returns < 0 if execution fails, and >= 0 otherwise. This
122: * assigns the input and output file descriptors on success.
123: */
1.1 deraadt 124:
1.27 markus 125: int
1.35 deraadt 126: do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout, int argc)
1.1 deraadt 127: {
1.18 markus 128: int pin[2], pout[2], reserved[2];
129:
130: if (verbose_mode)
1.78 deraadt 131: fprintf(stderr,
132: "Executing: program %s host %s, user %s, command %s\n",
133: ssh_program, host,
134: remuser ? remuser : "(unspecified)", cmd);
1.18 markus 135:
1.20 markus 136: /*
137: * Reserve two descriptors so that the real pipes won't get
138: * descriptors 0 and 1 because that will screw up dup2 below.
139: */
1.18 markus 140: pipe(reserved);
141:
142: /* Create a socket pair for communicating with ssh. */
143: if (pipe(pin) < 0)
144: fatal("pipe: %s", strerror(errno));
145: if (pipe(pout) < 0)
146: fatal("pipe: %s", strerror(errno));
147:
148: /* Free the reserved descriptors. */
149: close(reserved[0]);
150: close(reserved[1]);
151:
1.106 nino 152: /* Fork a child to execute the command on the remote host using ssh. */
1.92 markus 153: do_cmd_pid = fork();
154: if (do_cmd_pid == 0) {
1.18 markus 155: /* Child. */
156: close(pin[1]);
157: close(pout[0]);
158: dup2(pin[0], 0);
159: dup2(pout[1], 1);
160: close(pin[0]);
161: close(pout[1]);
162:
1.41 markus 163: args.list[0] = ssh_program;
164: if (remuser != NULL)
1.70 mouring 165: addargs(&args, "-l%s", remuser);
166: addargs(&args, "%s", host);
167: addargs(&args, "%s", cmd);
1.18 markus 168:
1.41 markus 169: execvp(ssh_program, args.list);
1.34 deraadt 170: perror(ssh_program);
1.18 markus 171: exit(1);
1.92 markus 172: } else if (do_cmd_pid == -1) {
173: fatal("fork: %s", strerror(errno));
1.18 markus 174: }
175: /* Parent. Close the other side, and return the local side. */
176: close(pin[0]);
177: *fdout = pin[1];
178: close(pout[1]);
179: *fdin = pout[0];
1.105 djm 180: signal(SIGTERM, killchild);
181: signal(SIGINT, killchild);
182: signal(SIGHUP, killchild);
1.18 markus 183: return 0;
1.1 deraadt 184: }
185:
186: typedef struct {
187: int cnt;
188: char *buf;
189: } BUF;
190:
1.18 markus 191: BUF *allocbuf(BUF *, int, int);
192: void lostconn(int);
193: void nospace(void);
194: int okname(char *);
195: void run_err(const char *,...);
196: void verifydir(char *);
1.1 deraadt 197:
198: struct passwd *pwd;
1.18 markus 199: uid_t userid;
1.1 deraadt 200: int errs, remin, remout;
201: int pflag, iamremote, iamrecursive, targetshouldbedirectory;
202:
203: #define CMDNEEDS 64
204: char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
205:
1.18 markus 206: int response(void);
207: void rsource(char *, struct stat *);
208: void sink(int, char *[]);
209: void source(int, char *[]);
210: void tolocal(int, char *[]);
211: void toremote(char *, int, char *[]);
212: void usage(void);
1.1 deraadt 213:
214: int
1.104 djm 215: main(int argc, char **argv)
1.1 deraadt 216: {
1.92 markus 217: int ch, fflag, tflag, status;
1.99 markus 218: double speed;
219: char *targ, *endp;
1.1 deraadt 220: extern char *optarg;
221: extern int optind;
222:
1.41 markus 223: args.list = NULL;
1.91 deraadt 224: addargs(&args, "ssh"); /* overwritten with ssh_program */
1.70 mouring 225: addargs(&args, "-x");
1.82 stevesk 226: addargs(&args, "-oForwardAgent no");
1.84 stevesk 227: addargs(&args, "-oClearAllForwardings yes");
1.41 markus 228:
1.1 deraadt 229: fflag = tflag = 0;
1.100 markus 230: while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q1246S:o:F:")) != -1)
1.18 markus 231: switch (ch) {
232: /* User-visible flags. */
1.100 markus 233: case '1':
234: case '2':
1.23 markus 235: case '4':
1.41 markus 236: case '6':
237: case 'C':
1.70 mouring 238: addargs(&args, "-%c", ch);
1.41 markus 239: break;
240: case 'o':
241: case 'c':
242: case 'i':
1.83 stevesk 243: case 'F':
1.70 mouring 244: addargs(&args, "-%c%s", ch, optarg);
1.23 markus 245: break;
1.41 markus 246: case 'P':
1.70 mouring 247: addargs(&args, "-p%s", optarg);
1.41 markus 248: break;
249: case 'B':
1.70 mouring 250: addargs(&args, "-oBatchmode yes");
1.23 markus 251: break;
1.99 markus 252: case 'l':
253: speed = strtod(optarg, &endp);
254: if (speed <= 0 || *endp != '\0')
255: usage();
1.113 djm 256: limit_rate = speed * 1024;
1.99 markus 257: break;
1.1 deraadt 258: case 'p':
259: pflag = 1;
260: break;
261: case 'r':
262: iamrecursive = 1;
263: break;
1.34 deraadt 264: case 'S':
1.41 markus 265: ssh_program = xstrdup(optarg);
266: break;
267: case 'v':
1.72 markus 268: addargs(&args, "-v");
1.41 markus 269: verbose_mode = 1;
270: break;
271: case 'q':
1.111 dtucker 272: addargs(&args, "-q");
1.41 markus 273: showprogress = 0;
1.34 deraadt 274: break;
275:
1.18 markus 276: /* Server options. */
1.1 deraadt 277: case 'd':
278: targetshouldbedirectory = 1;
279: break;
1.18 markus 280: case 'f': /* "from" */
1.1 deraadt 281: iamremote = 1;
282: fflag = 1;
283: break;
1.18 markus 284: case 't': /* "to" */
1.1 deraadt 285: iamremote = 1;
286: tflag = 1;
287: break;
288: default:
289: usage();
290: }
291: argc -= optind;
292: argv += optind;
293:
294: if ((pwd = getpwuid(userid = getuid())) == NULL)
1.108 deraadt 295: fatal("unknown user %u", (u_int) userid);
1.1 deraadt 296:
1.18 markus 297: if (!isatty(STDERR_FILENO))
1.7 deraadt 298: showprogress = 0;
299:
1.1 deraadt 300: remin = STDIN_FILENO;
301: remout = STDOUT_FILENO;
302:
1.52 stevesk 303: if (fflag) {
1.18 markus 304: /* Follow "protocol", send data. */
305: (void) response();
1.1 deraadt 306: source(argc, argv);
307: exit(errs != 0);
308: }
1.18 markus 309: if (tflag) {
310: /* Receive data. */
1.1 deraadt 311: sink(argc, argv);
312: exit(errs != 0);
313: }
314: if (argc < 2)
315: usage();
316: if (argc > 2)
317: targetshouldbedirectory = 1;
318:
319: remin = remout = -1;
1.92 markus 320: do_cmd_pid = -1;
1.1 deraadt 321: /* Command to be executed on remote system using "ssh". */
1.55 deraadt 322: (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
323: verbose_mode ? " -v" : "",
1.35 deraadt 324: iamrecursive ? " -r" : "", pflag ? " -p" : "",
325: targetshouldbedirectory ? " -d" : "");
1.1 deraadt 326:
1.18 markus 327: (void) signal(SIGPIPE, lostconn);
1.1 deraadt 328:
329: if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */
330: toremote(targ, argc, argv);
331: else {
1.18 markus 332: tolocal(argc, argv); /* Dest is local host. */
1.1 deraadt 333: if (targetshouldbedirectory)
334: verifydir(argv[argc - 1]);
1.92 markus 335: }
336: /*
337: * Finally check the exit status of the ssh process, if one was forked
338: * and no error has occured yet
339: */
340: if (do_cmd_pid != -1 && errs == 0) {
341: if (remin != -1)
342: (void) close(remin);
343: if (remout != -1)
344: (void) close(remout);
345: if (waitpid(do_cmd_pid, &status, 0) == -1)
346: errs = 1;
347: else {
348: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
349: errs = 1;
350: }
1.1 deraadt 351: }
352: exit(errs != 0);
353: }
354:
355: void
1.104 djm 356: toremote(char *targ, int argc, char **argv)
1.1 deraadt 357: {
358: int i, len;
1.120 ! deraadt 359: char *bp, *host, *src, *suser, *thost, *tuser, *arg;
1.1 deraadt 360:
361: *targ++ = 0;
362: if (*targ == 0)
363: targ = ".";
364:
1.120 ! deraadt 365: arg = strdup(argv[argc - 1]);
! 366: if (!arg)
! 367: err(1, "malloc");
! 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;
1.97 fgsch 502: off_t i, amt, result, statbytes;
1.68 markus 503: int fd, haderr, indx;
1.1 deraadt 504: char *last, *name, buf[2048];
1.65 deraadt 505: int len;
1.1 deraadt 506:
507: for (indx = 0; indx < argc; ++indx) {
1.18 markus 508: name = argv[indx];
1.11 aaron 509: statbytes = 0;
1.65 deraadt 510: len = strlen(name);
511: while (len > 1 && name[len-1] == '/')
512: name[--len] = '\0';
1.85 markus 513: if (strchr(name, '\n') != NULL) {
514: run_err("%s: skipping, filename contains a newline",
515: name);
516: goto next;
517: }
1.1 deraadt 518: if ((fd = open(name, O_RDONLY, 0)) < 0)
519: goto syserr;
520: if (fstat(fd, &stb) < 0) {
521: syserr: run_err("%s: %s", name, strerror(errno));
522: goto next;
523: }
524: switch (stb.st_mode & S_IFMT) {
525: case S_IFREG:
526: break;
527: case S_IFDIR:
528: if (iamrecursive) {
529: rsource(name, &stb);
530: goto next;
531: }
532: /* FALLTHROUGH */
533: default:
534: run_err("%s: not a regular file", name);
535: goto next;
536: }
537: if ((last = strrchr(name, '/')) == NULL)
538: last = name;
539: else
540: ++last;
1.11 aaron 541: curfile = last;
1.1 deraadt 542: if (pflag) {
543: /*
544: * Make it compatible with possible future
545: * versions expecting microseconds.
546: */
1.55 deraadt 547: (void) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n",
1.47 markus 548: (u_long) stb.st_mtime,
549: (u_long) stb.st_atime);
1.107 deraadt 550: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 551: if (response() < 0)
552: goto next;
553: }
554: #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
1.61 markus 555: snprintf(buf, sizeof buf, "C%04o %lld %s\n",
1.47 markus 556: (u_int) (stb.st_mode & FILEMODEMASK),
1.62 markus 557: (long long)stb.st_size, last);
1.18 markus 558: if (verbose_mode) {
559: fprintf(stderr, "Sending file modes: %s", buf);
560: }
1.107 deraadt 561: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 562: if (response() < 0)
563: goto next;
564: if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) {
1.18 markus 565: next: (void) close(fd);
1.1 deraadt 566: continue;
567: }
1.97 fgsch 568: if (showprogress)
569: start_progress_meter(curfile, stb.st_size, &statbytes);
1.1 deraadt 570: /* Keep writing after an error so that we stay sync'd up. */
571: for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
572: amt = bp->cnt;
573: if (i + amt > stb.st_size)
574: amt = stb.st_size - i;
575: if (!haderr) {
1.30 deraadt 576: result = atomicio(read, fd, bp->buf, amt);
1.1 deraadt 577: if (result != amt)
578: haderr = result >= 0 ? EIO : errno;
579: }
580: if (haderr)
1.107 deraadt 581: (void) atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 582: else {
1.107 deraadt 583: result = atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 584: if (result != amt)
585: haderr = result >= 0 ? EIO : errno;
1.4 aaron 586: statbytes += result;
1.1 deraadt 587: }
1.113 djm 588: if (limit_rate)
1.99 markus 589: bwlimit(amt);
1.1 deraadt 590: }
1.18 markus 591: if (showprogress)
1.97 fgsch 592: stop_progress_meter();
1.4 aaron 593:
1.1 deraadt 594: if (close(fd) < 0 && !haderr)
595: haderr = errno;
596: if (!haderr)
1.107 deraadt 597: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 598: else
599: run_err("%s: %s", name, strerror(haderr));
1.18 markus 600: (void) response();
1.1 deraadt 601: }
602: }
603:
604: void
1.104 djm 605: rsource(char *name, struct stat *statp)
1.1 deraadt 606: {
607: DIR *dirp;
608: struct dirent *dp;
609: char *last, *vect[1], path[1100];
610:
611: if (!(dirp = opendir(name))) {
612: run_err("%s: %s", name, strerror(errno));
613: return;
614: }
615: last = strrchr(name, '/');
616: if (last == 0)
617: last = name;
618: else
619: last++;
620: if (pflag) {
1.55 deraadt 621: (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n",
1.47 markus 622: (u_long) statp->st_mtime,
623: (u_long) statp->st_atime);
1.107 deraadt 624: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 625: if (response() < 0) {
626: closedir(dirp);
627: return;
628: }
629: }
1.55 deraadt 630: (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n",
1.47 markus 631: (u_int) (statp->st_mode & FILEMODEMASK), 0, last);
1.18 markus 632: if (verbose_mode)
633: fprintf(stderr, "Entering directory: %s", path);
1.107 deraadt 634: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 635: if (response() < 0) {
636: closedir(dirp);
637: return;
638: }
1.63 stevesk 639: while ((dp = readdir(dirp)) != NULL) {
1.1 deraadt 640: if (dp->d_ino == 0)
641: continue;
642: if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
643: continue;
644: if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) {
645: run_err("%s/%s: name too long", name, dp->d_name);
646: continue;
647: }
1.55 deraadt 648: (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name);
1.1 deraadt 649: vect[0] = path;
650: source(1, vect);
651: }
1.18 markus 652: (void) closedir(dirp);
1.107 deraadt 653: (void) atomicio(vwrite, remout, "E\n", 2);
1.18 markus 654: (void) response();
1.1 deraadt 655: }
656:
657: void
1.99 markus 658: bwlimit(int amount)
659: {
660: static struct timeval bwstart, bwend;
661: static int lamt, thresh = 16384;
1.115 avsm 662: u_int64_t waitlen;
1.99 markus 663: struct timespec ts, rm;
664:
665: if (!timerisset(&bwstart)) {
666: gettimeofday(&bwstart, NULL);
667: return;
668: }
669:
670: lamt += amount;
671: if (lamt < thresh)
672: return;
673:
674: gettimeofday(&bwend, NULL);
675: timersub(&bwend, &bwstart, &bwend);
676: if (!timerisset(&bwend))
677: return;
678:
679: lamt *= 8;
1.115 avsm 680: waitlen = (double)1000000L * lamt / limit_rate;
1.99 markus 681:
1.115 avsm 682: bwstart.tv_sec = waitlen / 1000000L;
683: bwstart.tv_usec = waitlen % 1000000L;
1.99 markus 684:
685: if (timercmp(&bwstart, &bwend, >)) {
686: timersub(&bwstart, &bwend, &bwend);
687:
688: /* Adjust the wait time */
689: if (bwend.tv_sec) {
690: thresh /= 2;
691: if (thresh < 2048)
692: thresh = 2048;
693: } else if (bwend.tv_usec < 100) {
694: thresh *= 2;
695: if (thresh > 32768)
696: thresh = 32768;
697: }
698:
699: TIMEVAL_TO_TIMESPEC(&bwend, &ts);
700: while (nanosleep(&ts, &rm) == -1) {
701: if (errno != EINTR)
702: break;
703: ts = rm;
704: }
705: }
706:
707: lamt = 0;
708: gettimeofday(&bwstart, NULL);
709: }
710:
711: void
1.104 djm 712: sink(int argc, char **argv)
1.1 deraadt 713: {
714: static BUF buffer;
715: struct stat stb;
1.18 markus 716: enum {
717: YES, NO, DISPLAYED
718: } wrerr;
1.1 deraadt 719: BUF *bp;
720: off_t i, j;
721: int amt, count, exists, first, mask, mode, ofd, omode;
1.97 fgsch 722: off_t size, statbytes;
1.36 deraadt 723: int setimes, targisdir, wrerrno = 0;
1.1 deraadt 724: char ch, *cp, *np, *targ, *why, *vect[1], buf[2048];
1.40 markus 725: struct timeval tv[2];
1.1 deraadt 726:
1.66 stevesk 727: #define atime tv[0]
728: #define mtime tv[1]
1.118 deraadt 729: #define SCREWUP(str) { why = str; goto screwup; }
1.1 deraadt 730:
731: setimes = targisdir = 0;
732: mask = umask(0);
733: if (!pflag)
1.18 markus 734: (void) umask(mask);
1.1 deraadt 735: if (argc != 1) {
736: run_err("ambiguous target");
737: exit(1);
738: }
739: targ = *argv;
740: if (targetshouldbedirectory)
741: verifydir(targ);
1.18 markus 742:
1.107 deraadt 743: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 744: if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
745: targisdir = 1;
746: for (first = 1;; first = 0) {
747: cp = buf;
1.30 deraadt 748: if (atomicio(read, remin, cp, 1) <= 0)
1.1 deraadt 749: return;
750: if (*cp++ == '\n')
751: SCREWUP("unexpected <newline>");
752: do {
1.30 deraadt 753: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 754: SCREWUP("lost connection");
755: *cp++ = ch;
756: } while (cp < &buf[sizeof(buf) - 1] && ch != '\n');
757: *cp = 0;
1.114 markus 758: if (verbose_mode)
759: fprintf(stderr, "Sink: %s", buf);
1.1 deraadt 760:
761: if (buf[0] == '\01' || buf[0] == '\02') {
762: if (iamremote == 0)
1.107 deraadt 763: (void) atomicio(vwrite, STDERR_FILENO,
1.44 deraadt 764: buf + 1, strlen(buf + 1));
1.1 deraadt 765: if (buf[0] == '\02')
766: exit(1);
767: ++errs;
768: continue;
769: }
770: if (buf[0] == 'E') {
1.107 deraadt 771: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 772: return;
773: }
774: if (ch == '\n')
775: *--cp = 0;
776:
777: cp = buf;
778: if (*cp == 'T') {
779: setimes++;
780: cp++;
1.66 stevesk 781: mtime.tv_sec = strtol(cp, &cp, 10);
782: if (!cp || *cp++ != ' ')
1.1 deraadt 783: SCREWUP("mtime.sec not delimited");
1.66 stevesk 784: mtime.tv_usec = strtol(cp, &cp, 10);
785: if (!cp || *cp++ != ' ')
1.1 deraadt 786: SCREWUP("mtime.usec not delimited");
1.66 stevesk 787: atime.tv_sec = strtol(cp, &cp, 10);
788: if (!cp || *cp++ != ' ')
1.1 deraadt 789: SCREWUP("atime.sec not delimited");
1.66 stevesk 790: atime.tv_usec = strtol(cp, &cp, 10);
791: if (!cp || *cp++ != '\0')
1.1 deraadt 792: SCREWUP("atime.usec not delimited");
1.107 deraadt 793: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 794: continue;
795: }
796: if (*cp != 'C' && *cp != 'D') {
797: /*
798: * Check for the case "rcp remote:foo\* local:bar".
799: * In this case, the line "No match." can be returned
800: * by the shell before the rcp command on the remote is
801: * executed so the ^Aerror_message convention isn't
802: * followed.
803: */
804: if (first) {
805: run_err("%s", cp);
806: exit(1);
807: }
808: SCREWUP("expected control record");
809: }
810: mode = 0;
811: for (++cp; cp < buf + 5; cp++) {
812: if (*cp < '0' || *cp > '7')
813: SCREWUP("bad mode");
814: mode = (mode << 3) | (*cp - '0');
815: }
816: if (*cp++ != ' ')
817: SCREWUP("mode not delimited");
818:
1.63 stevesk 819: for (size = 0; isdigit(*cp);)
1.1 deraadt 820: size = size * 10 + (*cp++ - '0');
821: if (*cp++ != ' ')
822: SCREWUP("size not delimited");
1.114 markus 823: if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) {
824: run_err("error: unexpected filename: %s", cp);
825: exit(1);
826: }
1.1 deraadt 827: if (targisdir) {
828: static char *namebuf;
829: static int cursize;
830: size_t need;
831:
832: need = strlen(targ) + strlen(cp) + 250;
1.55 deraadt 833: if (need > cursize) {
1.58 danh 834: if (namebuf)
835: xfree(namebuf);
1.18 markus 836: namebuf = xmalloc(need);
1.55 deraadt 837: cursize = need;
838: }
839: (void) snprintf(namebuf, need, "%s%s%s", targ,
1.88 mouring 840: strcmp(targ, "/") ? "/" : "", cp);
1.1 deraadt 841: np = namebuf;
842: } else
843: np = targ;
1.12 aaron 844: curfile = cp;
1.1 deraadt 845: exists = stat(np, &stb) == 0;
846: if (buf[0] == 'D') {
847: int mod_flag = pflag;
1.114 markus 848: if (!iamrecursive)
849: SCREWUP("received directory without -r");
1.1 deraadt 850: if (exists) {
851: if (!S_ISDIR(stb.st_mode)) {
852: errno = ENOTDIR;
853: goto bad;
854: }
855: if (pflag)
1.18 markus 856: (void) chmod(np, mode);
1.1 deraadt 857: } else {
1.18 markus 858: /* Handle copying from a read-only
859: directory */
1.1 deraadt 860: mod_flag = 1;
861: if (mkdir(np, mode | S_IRWXU) < 0)
862: goto bad;
863: }
1.58 danh 864: vect[0] = xstrdup(np);
1.1 deraadt 865: sink(1, vect);
866: if (setimes) {
867: setimes = 0;
1.59 deraadt 868: if (utimes(vect[0], tv) < 0)
1.18 markus 869: run_err("%s: set times: %s",
1.59 deraadt 870: vect[0], strerror(errno));
1.1 deraadt 871: }
872: if (mod_flag)
1.59 deraadt 873: (void) chmod(vect[0], mode);
874: if (vect[0])
875: xfree(vect[0]);
1.1 deraadt 876: continue;
877: }
878: omode = mode;
879: mode |= S_IWRITE;
1.71 markus 880: if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
1.1 deraadt 881: bad: run_err("%s: %s", np, strerror(errno));
882: continue;
883: }
1.107 deraadt 884: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 885: if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) {
1.18 markus 886: (void) close(ofd);
1.1 deraadt 887: continue;
888: }
889: cp = bp->buf;
890: wrerr = NO;
1.7 deraadt 891:
1.12 aaron 892: statbytes = 0;
1.97 fgsch 893: if (showprogress)
894: start_progress_meter(curfile, size, &statbytes);
1.1 deraadt 895: for (count = i = 0; i < size; i += 4096) {
896: amt = 4096;
897: if (i + amt > size)
898: amt = size - i;
899: count += amt;
900: do {
1.117 avsm 901: j = atomicio(read, remin, cp, amt);
902: if (j <= 0) {
1.1 deraadt 903: run_err("%s", j ? strerror(errno) :
1.63 stevesk 904: "dropped connection");
1.1 deraadt 905: exit(1);
906: }
907: amt -= j;
908: cp += j;
1.18 markus 909: statbytes += j;
1.1 deraadt 910: } while (amt > 0);
1.112 djm 911:
1.113 djm 912: if (limit_rate)
1.99 markus 913: bwlimit(4096);
914:
1.1 deraadt 915: if (count == bp->cnt) {
916: /* Keep reading so we stay sync'd up. */
917: if (wrerr == NO) {
1.107 deraadt 918: j = atomicio(vwrite, ofd, bp->buf, count);
1.1 deraadt 919: if (j != count) {
920: wrerr = YES;
1.18 markus 921: wrerrno = j >= 0 ? EIO : errno;
1.1 deraadt 922: }
923: }
924: count = 0;
925: cp = bp->buf;
926: }
927: }
1.7 deraadt 928: if (showprogress)
1.97 fgsch 929: stop_progress_meter();
1.1 deraadt 930: if (count != 0 && wrerr == NO &&
1.107 deraadt 931: (j = atomicio(vwrite, ofd, bp->buf, count)) != count) {
1.1 deraadt 932: wrerr = YES;
1.18 markus 933: wrerrno = j >= 0 ? EIO : errno;
1.1 deraadt 934: }
1.98 djm 935: if (wrerr == NO && ftruncate(ofd, size) != 0) {
1.1 deraadt 936: run_err("%s: truncate: %s", np, strerror(errno));
937: wrerr = DISPLAYED;
938: }
939: if (pflag) {
940: if (exists || omode != mode)
1.116 dtucker 941: if (fchmod(ofd, omode)) {
1.1 deraadt 942: run_err("%s: set mode: %s",
1.63 stevesk 943: np, strerror(errno));
1.116 dtucker 944: wrerr = DISPLAYED;
945: }
1.1 deraadt 946: } else {
947: if (!exists && omode != mode)
1.116 dtucker 948: if (fchmod(ofd, omode & ~mask)) {
1.1 deraadt 949: run_err("%s: set mode: %s",
1.63 stevesk 950: np, strerror(errno));
1.116 dtucker 951: wrerr = DISPLAYED;
952: }
1.1 deraadt 953: }
1.33 provos 954: if (close(ofd) == -1) {
955: wrerr = YES;
956: wrerrno = errno;
957: }
1.18 markus 958: (void) response();
1.1 deraadt 959: if (setimes && wrerr == NO) {
960: setimes = 0;
1.40 markus 961: if (utimes(np, tv) < 0) {
1.1 deraadt 962: run_err("%s: set times: %s",
1.63 stevesk 963: np, strerror(errno));
1.1 deraadt 964: wrerr = DISPLAYED;
965: }
966: }
1.18 markus 967: switch (wrerr) {
1.1 deraadt 968: case YES:
969: run_err("%s: %s", np, strerror(wrerrno));
970: break;
971: case NO:
1.107 deraadt 972: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 973: break;
974: case DISPLAYED:
975: break;
976: }
977: }
978: screwup:
979: run_err("protocol error: %s", why);
980: exit(1);
981: }
982:
983: int
1.86 itojun 984: response(void)
1.1 deraadt 985: {
986: char ch, *cp, resp, rbuf[2048];
987:
1.30 deraadt 988: if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp))
1.1 deraadt 989: lostconn(0);
990:
991: cp = rbuf;
1.18 markus 992: switch (resp) {
993: case 0: /* ok */
1.1 deraadt 994: return (0);
995: default:
996: *cp++ = resp;
997: /* FALLTHROUGH */
1.18 markus 998: case 1: /* error, followed by error msg */
999: case 2: /* fatal error, "" */
1.1 deraadt 1000: do {
1.30 deraadt 1001: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 1002: lostconn(0);
1003: *cp++ = ch;
1004: } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
1005:
1006: if (!iamremote)
1.107 deraadt 1007: (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf);
1.1 deraadt 1008: ++errs;
1009: if (resp == 1)
1010: return (-1);
1011: exit(1);
1012: }
1013: /* NOTREACHED */
1014: }
1015:
1016: void
1.86 itojun 1017: usage(void)
1.1 deraadt 1018: {
1.83 stevesk 1019: (void) fprintf(stderr,
1.110 jmc 1020: "usage: scp [-1246BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n"
1021: " [-l limit] [-o ssh_option] [-P port] [-S program]\n"
1.90 deraadt 1022: " [[user@]host1:]file1 [...] [[user@]host2:]file2\n");
1.1 deraadt 1023: exit(1);
1024: }
1025:
1026: void
1.18 markus 1027: run_err(const char *fmt,...)
1.1 deraadt 1028: {
1029: static FILE *fp;
1030: va_list ap;
1031:
1032: ++errs;
1033: if (fp == NULL && !(fp = fdopen(remout, "w")))
1034: return;
1.18 markus 1035: (void) fprintf(fp, "%c", 0x01);
1036: (void) fprintf(fp, "scp: ");
1.73 markus 1037: va_start(ap, fmt);
1.18 markus 1038: (void) vfprintf(fp, fmt, ap);
1.73 markus 1039: va_end(ap);
1.18 markus 1040: (void) fprintf(fp, "\n");
1041: (void) fflush(fp);
1042:
1043: if (!iamremote) {
1.73 markus 1044: va_start(ap, fmt);
1.18 markus 1045: vfprintf(stderr, fmt, ap);
1.73 markus 1046: va_end(ap);
1.18 markus 1047: fprintf(stderr, "\n");
1048: }
1.1 deraadt 1049: }
1050:
1051: void
1.104 djm 1052: verifydir(char *cp)
1.1 deraadt 1053: {
1054: struct stat stb;
1055:
1056: if (!stat(cp, &stb)) {
1057: if (S_ISDIR(stb.st_mode))
1058: return;
1059: errno = ENOTDIR;
1060: }
1061: run_err("%s: %s", cp, strerror(errno));
1062: exit(1);
1063: }
1064:
1065: int
1.104 djm 1066: okname(char *cp0)
1.1 deraadt 1067: {
1068: int c;
1069: char *cp;
1070:
1071: cp = cp0;
1072: do {
1.75 deraadt 1073: c = (int)*cp;
1.1 deraadt 1074: if (c & 0200)
1075: goto bad;
1.101 markus 1076: if (!isalpha(c) && !isdigit(c)) {
1077: switch (c) {
1078: case '\'':
1079: case '"':
1080: case '`':
1081: case ' ':
1082: case '#':
1083: goto bad;
1084: default:
1085: break;
1086: }
1087: }
1.1 deraadt 1088: } while (*++cp);
1089: return (1);
1090:
1.25 markus 1091: bad: fprintf(stderr, "%s: invalid user name\n", cp0);
1.1 deraadt 1092: return (0);
1093: }
1094:
1095: BUF *
1.104 djm 1096: allocbuf(BUF *bp, int fd, int blksize)
1.1 deraadt 1097: {
1098: size_t size;
1099: struct stat stb;
1100:
1101: if (fstat(fd, &stb) < 0) {
1102: run_err("fstat: %s", strerror(errno));
1103: return (0);
1104: }
1.95 markus 1105: size = roundup(stb.st_blksize, blksize);
1106: if (size == 0)
1.18 markus 1107: size = blksize;
1.1 deraadt 1108: if (bp->cnt >= size)
1109: return (bp);
1.18 markus 1110: if (bp->buf == NULL)
1111: bp->buf = xmalloc(size);
1112: else
1113: bp->buf = xrealloc(bp->buf, size);
1.81 markus 1114: memset(bp->buf, 0, size);
1.1 deraadt 1115: bp->cnt = size;
1116: return (bp);
1117: }
1118:
1119: void
1.104 djm 1120: lostconn(int signo)
1.1 deraadt 1121: {
1122: if (!iamremote)
1.74 markus 1123: write(STDERR_FILENO, "lost connection\n", 16);
1124: if (signo)
1125: _exit(1);
1126: else
1127: exit(1);
1.4 aaron 1128: }
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