Annotation of src/usr.bin/ssh/scp.c, Revision 1.136
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"
1.136 ! biorn 74: RCSID("$OpenBSD: scp.c,v 1.135 2006/02/22 00:04:44 stevesk Exp $");
1.132 stevesk 75:
76: #include <sys/types.h>
77: #include <sys/wait.h>
1.134 stevesk 78: #include <sys/stat.h>
1.131 stevesk 79:
1.135 stevesk 80: #include <ctype.h>
1.131 stevesk 81: #include <dirent.h>
1.133 stevesk 82: #include <signal.h>
1.1 deraadt 83:
84: #include "xmalloc.h"
1.51 markus 85: #include "atomicio.h"
1.50 markus 86: #include "pathnames.h"
1.51 markus 87: #include "log.h"
1.69 mouring 88: #include "misc.h"
1.97 fgsch 89: #include "progressmeter.h"
1.1 deraadt 90:
1.35 deraadt 91: int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout, int argc);
1.11 aaron 92:
1.99 markus 93: void bwlimit(int);
94:
1.70 mouring 95: /* Struct for addargs */
96: arglist args;
1.41 markus 97:
1.99 markus 98: /* Bandwidth limit */
1.113 djm 99: off_t limit_rate = 0;
1.99 markus 100:
1.11 aaron 101: /* Name of current file being transferred. */
102: char *curfile;
1.4 aaron 103:
1.1 deraadt 104: /* This is set to non-zero to enable verbose mode. */
1.17 markus 105: int verbose_mode = 0;
1.1 deraadt 106:
1.6 aaron 107: /* This is set to zero if the progressmeter is not desired. */
108: int showprogress = 1;
109:
1.34 deraadt 110: /* This is the program to execute for the secured connection. ("ssh" or -S) */
1.50 markus 111: char *ssh_program = _PATH_SSH_PROGRAM;
1.34 deraadt 112:
1.92 markus 113: /* This is used to store the pid of ssh_program */
1.105 djm 114: pid_t do_cmd_pid = -1;
115:
116: static void
117: killchild(int signo)
118: {
1.119 dtucker 119: if (do_cmd_pid > 1) {
1.123 avsm 120: kill(do_cmd_pid, signo ? signo : SIGTERM);
1.119 dtucker 121: waitpid(do_cmd_pid, NULL, 0);
122: }
1.105 djm 123:
1.123 avsm 124: if (signo)
125: _exit(1);
126: exit(1);
1.105 djm 127: }
1.92 markus 128:
1.129 djm 129: static int
130: do_local_cmd(arglist *a)
131: {
132: u_int i;
133: int status;
134: pid_t pid;
135:
136: if (a->num == 0)
137: fatal("do_local_cmd: no arguments");
138:
139: if (verbose_mode) {
140: fprintf(stderr, "Executing:");
141: for (i = 0; i < a->num; i++)
142: fprintf(stderr, " %s", a->list[i]);
143: fprintf(stderr, "\n");
144: }
145: if ((pid = fork()) == -1)
146: fatal("do_local_cmd: fork: %s", strerror(errno));
147:
148: if (pid == 0) {
149: execvp(a->list[0], a->list);
150: perror(a->list[0]);
151: exit(1);
152: }
153:
154: do_cmd_pid = pid;
155: signal(SIGTERM, killchild);
156: signal(SIGINT, killchild);
157: signal(SIGHUP, killchild);
158:
159: while (waitpid(pid, &status, 0) == -1)
160: if (errno != EINTR)
161: fatal("do_local_cmd: waitpid: %s", strerror(errno));
162:
163: do_cmd_pid = -1;
164:
165: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
166: return (-1);
167:
168: return (0);
169: }
170:
1.20 markus 171: /*
172: * This function executes the given command as the specified user on the
173: * given host. This returns < 0 if execution fails, and >= 0 otherwise. This
174: * assigns the input and output file descriptors on success.
175: */
1.1 deraadt 176:
1.27 markus 177: int
1.35 deraadt 178: do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout, int argc)
1.1 deraadt 179: {
1.18 markus 180: int pin[2], pout[2], reserved[2];
181:
182: if (verbose_mode)
1.78 deraadt 183: fprintf(stderr,
184: "Executing: program %s host %s, user %s, command %s\n",
185: ssh_program, host,
186: remuser ? remuser : "(unspecified)", cmd);
1.18 markus 187:
1.20 markus 188: /*
189: * Reserve two descriptors so that the real pipes won't get
190: * descriptors 0 and 1 because that will screw up dup2 below.
191: */
1.18 markus 192: pipe(reserved);
193:
194: /* Create a socket pair for communicating with ssh. */
195: if (pipe(pin) < 0)
196: fatal("pipe: %s", strerror(errno));
197: if (pipe(pout) < 0)
198: fatal("pipe: %s", strerror(errno));
199:
200: /* Free the reserved descriptors. */
201: close(reserved[0]);
202: close(reserved[1]);
203:
1.106 nino 204: /* Fork a child to execute the command on the remote host using ssh. */
1.92 markus 205: do_cmd_pid = fork();
206: if (do_cmd_pid == 0) {
1.18 markus 207: /* Child. */
208: close(pin[1]);
209: close(pout[0]);
210: dup2(pin[0], 0);
211: dup2(pout[1], 1);
212: close(pin[0]);
213: close(pout[1]);
214:
1.129 djm 215: replacearg(&args, 0, "%s", ssh_program);
1.41 markus 216: if (remuser != NULL)
1.70 mouring 217: addargs(&args, "-l%s", remuser);
218: addargs(&args, "%s", host);
219: addargs(&args, "%s", cmd);
1.18 markus 220:
1.41 markus 221: execvp(ssh_program, args.list);
1.34 deraadt 222: perror(ssh_program);
1.18 markus 223: exit(1);
1.92 markus 224: } else if (do_cmd_pid == -1) {
225: fatal("fork: %s", strerror(errno));
1.18 markus 226: }
227: /* Parent. Close the other side, and return the local side. */
228: close(pin[0]);
229: *fdout = pin[1];
230: close(pout[1]);
231: *fdin = pout[0];
1.105 djm 232: signal(SIGTERM, killchild);
233: signal(SIGINT, killchild);
234: signal(SIGHUP, killchild);
1.18 markus 235: return 0;
1.1 deraadt 236: }
237:
238: typedef struct {
1.124 djm 239: size_t cnt;
1.1 deraadt 240: char *buf;
241: } BUF;
242:
1.18 markus 243: BUF *allocbuf(BUF *, int, int);
244: void lostconn(int);
245: void nospace(void);
246: int okname(char *);
247: void run_err(const char *,...);
248: void verifydir(char *);
1.1 deraadt 249:
250: struct passwd *pwd;
1.18 markus 251: uid_t userid;
1.1 deraadt 252: int errs, remin, remout;
253: int pflag, iamremote, iamrecursive, targetshouldbedirectory;
254:
255: #define CMDNEEDS 64
256: char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
257:
1.18 markus 258: int response(void);
259: void rsource(char *, struct stat *);
260: void sink(int, char *[]);
261: void source(int, char *[]);
262: void tolocal(int, char *[]);
263: void toremote(char *, int, char *[]);
264: void usage(void);
1.1 deraadt 265:
266: int
1.104 djm 267: main(int argc, char **argv)
1.1 deraadt 268: {
1.92 markus 269: int ch, fflag, tflag, status;
1.99 markus 270: double speed;
271: char *targ, *endp;
1.1 deraadt 272: extern char *optarg;
273: extern int optind;
1.126 djm 274:
275: /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
276: sanitise_stdfd();
1.1 deraadt 277:
1.129 djm 278: memset(&args, '\0', sizeof(args));
1.41 markus 279: args.list = NULL;
1.129 djm 280: addargs(&args, "%s", ssh_program);
1.70 mouring 281: addargs(&args, "-x");
1.82 stevesk 282: addargs(&args, "-oForwardAgent no");
1.128 reyk 283: addargs(&args, "-oPermitLocalCommand no");
1.84 stevesk 284: addargs(&args, "-oClearAllForwardings yes");
1.41 markus 285:
1.1 deraadt 286: fflag = tflag = 0;
1.100 markus 287: while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q1246S:o:F:")) != -1)
1.18 markus 288: switch (ch) {
289: /* User-visible flags. */
1.100 markus 290: case '1':
291: case '2':
1.23 markus 292: case '4':
1.41 markus 293: case '6':
294: case 'C':
1.70 mouring 295: addargs(&args, "-%c", ch);
1.41 markus 296: break;
297: case 'o':
298: case 'c':
299: case 'i':
1.83 stevesk 300: case 'F':
1.70 mouring 301: addargs(&args, "-%c%s", ch, optarg);
1.23 markus 302: break;
1.41 markus 303: case 'P':
1.70 mouring 304: addargs(&args, "-p%s", optarg);
1.41 markus 305: break;
306: case 'B':
1.70 mouring 307: addargs(&args, "-oBatchmode yes");
1.23 markus 308: break;
1.99 markus 309: case 'l':
310: speed = strtod(optarg, &endp);
311: if (speed <= 0 || *endp != '\0')
312: usage();
1.113 djm 313: limit_rate = speed * 1024;
1.99 markus 314: break;
1.1 deraadt 315: case 'p':
316: pflag = 1;
317: break;
318: case 'r':
319: iamrecursive = 1;
320: break;
1.34 deraadt 321: case 'S':
1.41 markus 322: ssh_program = xstrdup(optarg);
323: break;
324: case 'v':
1.72 markus 325: addargs(&args, "-v");
1.41 markus 326: verbose_mode = 1;
327: break;
328: case 'q':
1.111 dtucker 329: addargs(&args, "-q");
1.41 markus 330: showprogress = 0;
1.34 deraadt 331: break;
332:
1.18 markus 333: /* Server options. */
1.1 deraadt 334: case 'd':
335: targetshouldbedirectory = 1;
336: break;
1.18 markus 337: case 'f': /* "from" */
1.1 deraadt 338: iamremote = 1;
339: fflag = 1;
340: break;
1.18 markus 341: case 't': /* "to" */
1.1 deraadt 342: iamremote = 1;
343: tflag = 1;
344: break;
345: default:
346: usage();
347: }
348: argc -= optind;
349: argv += optind;
350:
351: if ((pwd = getpwuid(userid = getuid())) == NULL)
1.108 deraadt 352: fatal("unknown user %u", (u_int) userid);
1.1 deraadt 353:
1.18 markus 354: if (!isatty(STDERR_FILENO))
1.7 deraadt 355: showprogress = 0;
356:
1.1 deraadt 357: remin = STDIN_FILENO;
358: remout = STDOUT_FILENO;
359:
1.52 stevesk 360: if (fflag) {
1.18 markus 361: /* Follow "protocol", send data. */
362: (void) response();
1.1 deraadt 363: source(argc, argv);
364: exit(errs != 0);
365: }
1.18 markus 366: if (tflag) {
367: /* Receive data. */
1.1 deraadt 368: sink(argc, argv);
369: exit(errs != 0);
370: }
371: if (argc < 2)
372: usage();
373: if (argc > 2)
374: targetshouldbedirectory = 1;
375:
376: remin = remout = -1;
1.92 markus 377: do_cmd_pid = -1;
1.1 deraadt 378: /* Command to be executed on remote system using "ssh". */
1.55 deraadt 379: (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
380: verbose_mode ? " -v" : "",
1.35 deraadt 381: iamrecursive ? " -r" : "", pflag ? " -p" : "",
382: targetshouldbedirectory ? " -d" : "");
1.1 deraadt 383:
1.18 markus 384: (void) signal(SIGPIPE, lostconn);
1.1 deraadt 385:
386: if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */
387: toremote(targ, argc, argv);
388: else {
389: if (targetshouldbedirectory)
390: verifydir(argv[argc - 1]);
1.130 djm 391: tolocal(argc, argv); /* Dest is local host. */
1.92 markus 392: }
393: /*
394: * Finally check the exit status of the ssh process, if one was forked
395: * and no error has occured yet
396: */
397: if (do_cmd_pid != -1 && errs == 0) {
398: if (remin != -1)
399: (void) close(remin);
400: if (remout != -1)
401: (void) close(remout);
402: if (waitpid(do_cmd_pid, &status, 0) == -1)
403: errs = 1;
404: else {
405: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
406: errs = 1;
407: }
1.1 deraadt 408: }
409: exit(errs != 0);
410: }
411:
412: void
1.104 djm 413: toremote(char *targ, int argc, char **argv)
1.1 deraadt 414: {
415: int i, len;
1.120 deraadt 416: char *bp, *host, *src, *suser, *thost, *tuser, *arg;
1.129 djm 417: arglist alist;
418:
419: memset(&alist, '\0', sizeof(alist));
420: alist.list = NULL;
1.1 deraadt 421:
422: *targ++ = 0;
423: if (*targ == 0)
424: targ = ".";
425:
1.121 djm 426: arg = xstrdup(argv[argc - 1]);
1.120 deraadt 427: if ((thost = strrchr(arg, '@'))) {
1.1 deraadt 428: /* user@host */
429: *thost++ = 0;
1.120 deraadt 430: tuser = arg;
1.1 deraadt 431: if (*tuser == '\0')
432: tuser = NULL;
433: } else {
1.120 deraadt 434: thost = arg;
1.1 deraadt 435: tuser = NULL;
436: }
437:
1.129 djm 438: if (tuser != NULL && !okname(tuser)) {
439: xfree(arg);
440: return;
441: }
442:
1.1 deraadt 443: for (i = 0; i < argc - 1; i++) {
444: src = colon(argv[i]);
1.18 markus 445: if (src) { /* remote to remote */
1.129 djm 446: freeargs(&alist);
447: addargs(&alist, "%s", ssh_program);
448: if (verbose_mode)
449: addargs(&alist, "-v");
450: addargs(&alist, "-x");
451: addargs(&alist, "-oClearAllForwardings yes");
452: addargs(&alist, "-n");
453:
1.1 deraadt 454: *src++ = 0;
455: if (*src == 0)
456: src = ".";
1.94 markus 457: host = strrchr(argv[i], '@');
1.129 djm 458:
1.1 deraadt 459: if (host) {
460: *host++ = 0;
1.23 markus 461: host = cleanhostname(host);
1.1 deraadt 462: suser = argv[i];
463: if (*suser == '\0')
464: suser = pwd->pw_name;
1.129 djm 465: else if (!okname(suser))
1.101 markus 466: continue;
1.129 djm 467: addargs(&alist, "-l");
468: addargs(&alist, "%s", suser);
1.23 markus 469: } else {
470: host = cleanhostname(argv[i]);
471: }
1.129 djm 472: addargs(&alist, "%s", host);
473: addargs(&alist, "%s", cmd);
474: addargs(&alist, "%s", src);
475: addargs(&alist, "%s%s%s:%s",
476: tuser ? tuser : "", tuser ? "@" : "",
477: thost, targ);
478: if (do_local_cmd(&alist) != 0)
1.109 markus 479: errs = 1;
1.18 markus 480: } else { /* local to remote */
1.1 deraadt 481: if (remin == -1) {
482: len = strlen(targ) + CMDNEEDS + 20;
1.18 markus 483: bp = xmalloc(len);
1.55 deraadt 484: (void) snprintf(bp, len, "%s -t %s", cmd, targ);
1.23 markus 485: host = cleanhostname(thost);
1.35 deraadt 486: if (do_cmd(host, tuser, bp, &remin,
487: &remout, argc) < 0)
1.18 markus 488: exit(1);
1.1 deraadt 489: if (response() < 0)
490: exit(1);
1.18 markus 491: (void) xfree(bp);
1.1 deraadt 492: }
1.18 markus 493: source(1, argv + i);
1.1 deraadt 494: }
495: }
496: }
497:
498: void
1.104 djm 499: tolocal(int argc, char **argv)
1.1 deraadt 500: {
501: int i, len;
502: char *bp, *host, *src, *suser;
1.129 djm 503: arglist alist;
504:
505: memset(&alist, '\0', sizeof(alist));
506: alist.list = NULL;
1.1 deraadt 507:
508: for (i = 0; i < argc - 1; i++) {
1.18 markus 509: if (!(src = colon(argv[i]))) { /* Local to local. */
1.129 djm 510: freeargs(&alist);
511: addargs(&alist, "%s", _PATH_CP);
512: if (iamrecursive)
513: addargs(&alist, "-r");
514: if (pflag)
515: addargs(&alist, "-p");
516: addargs(&alist, "%s", argv[i]);
517: addargs(&alist, "%s", argv[argc-1]);
518: if (do_local_cmd(&alist))
1.1 deraadt 519: ++errs;
520: continue;
521: }
522: *src++ = 0;
523: if (*src == 0)
524: src = ".";
1.94 markus 525: if ((host = strrchr(argv[i], '@')) == NULL) {
1.1 deraadt 526: host = argv[i];
527: suser = NULL;
528: } else {
529: *host++ = 0;
530: suser = argv[i];
531: if (*suser == '\0')
532: suser = pwd->pw_name;
533: }
1.23 markus 534: host = cleanhostname(host);
1.1 deraadt 535: len = strlen(src) + CMDNEEDS + 20;
1.18 markus 536: bp = xmalloc(len);
1.55 deraadt 537: (void) snprintf(bp, len, "%s -f %s", cmd, src);
1.35 deraadt 538: if (do_cmd(host, suser, bp, &remin, &remout, argc) < 0) {
1.18 markus 539: (void) xfree(bp);
540: ++errs;
541: continue;
1.1 deraadt 542: }
1.18 markus 543: xfree(bp);
1.1 deraadt 544: sink(1, argv + argc - 1);
1.18 markus 545: (void) close(remin);
1.1 deraadt 546: remin = remout = -1;
547: }
548: }
549:
550: void
1.104 djm 551: source(int argc, char **argv)
1.1 deraadt 552: {
553: struct stat stb;
554: static BUF buffer;
555: BUF *bp;
1.122 avsm 556: off_t i, amt, statbytes;
557: size_t result;
1.125 dtucker 558: int fd = -1, haderr, indx;
1.1 deraadt 559: char *last, *name, buf[2048];
1.65 deraadt 560: int len;
1.1 deraadt 561:
562: for (indx = 0; indx < argc; ++indx) {
1.18 markus 563: name = argv[indx];
1.11 aaron 564: statbytes = 0;
1.65 deraadt 565: len = strlen(name);
566: while (len > 1 && name[len-1] == '/')
567: name[--len] = '\0';
1.85 markus 568: if (strchr(name, '\n') != NULL) {
569: run_err("%s: skipping, filename contains a newline",
570: name);
571: goto next;
572: }
1.1 deraadt 573: if ((fd = open(name, O_RDONLY, 0)) < 0)
574: goto syserr;
575: if (fstat(fd, &stb) < 0) {
576: syserr: run_err("%s: %s", name, strerror(errno));
577: goto next;
578: }
579: switch (stb.st_mode & S_IFMT) {
580: case S_IFREG:
581: break;
582: case S_IFDIR:
583: if (iamrecursive) {
584: rsource(name, &stb);
585: goto next;
586: }
587: /* FALLTHROUGH */
588: default:
589: run_err("%s: not a regular file", name);
590: goto next;
591: }
592: if ((last = strrchr(name, '/')) == NULL)
593: last = name;
594: else
595: ++last;
1.11 aaron 596: curfile = last;
1.1 deraadt 597: if (pflag) {
598: /*
599: * Make it compatible with possible future
600: * versions expecting microseconds.
601: */
1.55 deraadt 602: (void) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n",
1.47 markus 603: (u_long) stb.st_mtime,
604: (u_long) stb.st_atime);
1.107 deraadt 605: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 606: if (response() < 0)
607: goto next;
608: }
609: #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
1.61 markus 610: snprintf(buf, sizeof buf, "C%04o %lld %s\n",
1.47 markus 611: (u_int) (stb.st_mode & FILEMODEMASK),
1.62 markus 612: (long long)stb.st_size, last);
1.18 markus 613: if (verbose_mode) {
614: fprintf(stderr, "Sending file modes: %s", buf);
615: }
1.107 deraadt 616: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 617: if (response() < 0)
618: goto next;
619: if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) {
1.127 deraadt 620: next: if (fd != -1) {
621: (void) close(fd);
622: fd = -1;
623: }
1.1 deraadt 624: continue;
625: }
1.97 fgsch 626: if (showprogress)
627: start_progress_meter(curfile, stb.st_size, &statbytes);
1.1 deraadt 628: /* Keep writing after an error so that we stay sync'd up. */
629: for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
630: amt = bp->cnt;
631: if (i + amt > stb.st_size)
632: amt = stb.st_size - i;
633: if (!haderr) {
1.30 deraadt 634: result = atomicio(read, fd, bp->buf, amt);
1.1 deraadt 635: if (result != amt)
1.122 avsm 636: haderr = errno;
1.1 deraadt 637: }
638: if (haderr)
1.107 deraadt 639: (void) atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 640: else {
1.107 deraadt 641: result = atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 642: if (result != amt)
1.122 avsm 643: haderr = errno;
1.4 aaron 644: statbytes += result;
1.1 deraadt 645: }
1.113 djm 646: if (limit_rate)
1.99 markus 647: bwlimit(amt);
1.1 deraadt 648: }
1.18 markus 649: if (showprogress)
1.97 fgsch 650: stop_progress_meter();
1.4 aaron 651:
1.127 deraadt 652: if (fd != -1) {
653: if (close(fd) < 0 && !haderr)
654: haderr = errno;
655: fd = -1;
656: }
1.1 deraadt 657: if (!haderr)
1.107 deraadt 658: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 659: else
660: run_err("%s: %s", name, strerror(haderr));
1.18 markus 661: (void) response();
1.1 deraadt 662: }
663: }
664:
665: void
1.104 djm 666: rsource(char *name, struct stat *statp)
1.1 deraadt 667: {
668: DIR *dirp;
669: struct dirent *dp;
670: char *last, *vect[1], path[1100];
671:
672: if (!(dirp = opendir(name))) {
673: run_err("%s: %s", name, strerror(errno));
674: return;
675: }
676: last = strrchr(name, '/');
677: if (last == 0)
678: last = name;
679: else
680: last++;
681: if (pflag) {
1.55 deraadt 682: (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n",
1.47 markus 683: (u_long) statp->st_mtime,
684: (u_long) statp->st_atime);
1.107 deraadt 685: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 686: if (response() < 0) {
687: closedir(dirp);
688: return;
689: }
690: }
1.55 deraadt 691: (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n",
1.47 markus 692: (u_int) (statp->st_mode & FILEMODEMASK), 0, last);
1.18 markus 693: if (verbose_mode)
694: fprintf(stderr, "Entering directory: %s", path);
1.107 deraadt 695: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 696: if (response() < 0) {
697: closedir(dirp);
698: return;
699: }
1.63 stevesk 700: while ((dp = readdir(dirp)) != NULL) {
1.1 deraadt 701: if (dp->d_ino == 0)
702: continue;
703: if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
704: continue;
705: if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) {
706: run_err("%s/%s: name too long", name, dp->d_name);
707: continue;
708: }
1.55 deraadt 709: (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name);
1.1 deraadt 710: vect[0] = path;
711: source(1, vect);
712: }
1.18 markus 713: (void) closedir(dirp);
1.107 deraadt 714: (void) atomicio(vwrite, remout, "E\n", 2);
1.18 markus 715: (void) response();
1.1 deraadt 716: }
717:
718: void
1.99 markus 719: bwlimit(int amount)
720: {
721: static struct timeval bwstart, bwend;
722: static int lamt, thresh = 16384;
1.115 avsm 723: u_int64_t waitlen;
1.99 markus 724: struct timespec ts, rm;
725:
726: if (!timerisset(&bwstart)) {
727: gettimeofday(&bwstart, NULL);
728: return;
729: }
730:
731: lamt += amount;
732: if (lamt < thresh)
733: return;
734:
735: gettimeofday(&bwend, NULL);
736: timersub(&bwend, &bwstart, &bwend);
737: if (!timerisset(&bwend))
738: return;
739:
740: lamt *= 8;
1.115 avsm 741: waitlen = (double)1000000L * lamt / limit_rate;
1.99 markus 742:
1.115 avsm 743: bwstart.tv_sec = waitlen / 1000000L;
744: bwstart.tv_usec = waitlen % 1000000L;
1.99 markus 745:
746: if (timercmp(&bwstart, &bwend, >)) {
747: timersub(&bwstart, &bwend, &bwend);
748:
749: /* Adjust the wait time */
750: if (bwend.tv_sec) {
751: thresh /= 2;
752: if (thresh < 2048)
753: thresh = 2048;
754: } else if (bwend.tv_usec < 100) {
755: thresh *= 2;
756: if (thresh > 32768)
757: thresh = 32768;
758: }
759:
760: TIMEVAL_TO_TIMESPEC(&bwend, &ts);
761: while (nanosleep(&ts, &rm) == -1) {
762: if (errno != EINTR)
763: break;
764: ts = rm;
765: }
766: }
767:
768: lamt = 0;
769: gettimeofday(&bwstart, NULL);
770: }
771:
772: void
1.104 djm 773: sink(int argc, char **argv)
1.1 deraadt 774: {
775: static BUF buffer;
776: struct stat stb;
1.18 markus 777: enum {
778: YES, NO, DISPLAYED
779: } wrerr;
1.1 deraadt 780: BUF *bp;
1.122 avsm 781: off_t i;
1.124 djm 782: size_t j, count;
783: int amt, exists, first, mask, mode, ofd, omode;
1.97 fgsch 784: off_t size, statbytes;
1.36 deraadt 785: int setimes, targisdir, wrerrno = 0;
1.1 deraadt 786: char ch, *cp, *np, *targ, *why, *vect[1], buf[2048];
1.40 markus 787: struct timeval tv[2];
1.1 deraadt 788:
1.66 stevesk 789: #define atime tv[0]
790: #define mtime tv[1]
1.118 deraadt 791: #define SCREWUP(str) { why = str; goto screwup; }
1.1 deraadt 792:
793: setimes = targisdir = 0;
794: mask = umask(0);
795: if (!pflag)
1.18 markus 796: (void) umask(mask);
1.1 deraadt 797: if (argc != 1) {
798: run_err("ambiguous target");
799: exit(1);
800: }
801: targ = *argv;
802: if (targetshouldbedirectory)
803: verifydir(targ);
1.18 markus 804:
1.107 deraadt 805: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 806: if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
807: targisdir = 1;
808: for (first = 1;; first = 0) {
809: cp = buf;
1.122 avsm 810: if (atomicio(read, remin, cp, 1) != 1)
1.1 deraadt 811: return;
812: if (*cp++ == '\n')
813: SCREWUP("unexpected <newline>");
814: do {
1.30 deraadt 815: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 816: SCREWUP("lost connection");
817: *cp++ = ch;
818: } while (cp < &buf[sizeof(buf) - 1] && ch != '\n');
819: *cp = 0;
1.114 markus 820: if (verbose_mode)
821: fprintf(stderr, "Sink: %s", buf);
1.1 deraadt 822:
823: if (buf[0] == '\01' || buf[0] == '\02') {
824: if (iamremote == 0)
1.107 deraadt 825: (void) atomicio(vwrite, STDERR_FILENO,
1.44 deraadt 826: buf + 1, strlen(buf + 1));
1.1 deraadt 827: if (buf[0] == '\02')
828: exit(1);
829: ++errs;
830: continue;
831: }
832: if (buf[0] == 'E') {
1.107 deraadt 833: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 834: return;
835: }
836: if (ch == '\n')
837: *--cp = 0;
838:
839: cp = buf;
840: if (*cp == 'T') {
841: setimes++;
842: cp++;
1.66 stevesk 843: mtime.tv_sec = strtol(cp, &cp, 10);
844: if (!cp || *cp++ != ' ')
1.1 deraadt 845: SCREWUP("mtime.sec not delimited");
1.66 stevesk 846: mtime.tv_usec = strtol(cp, &cp, 10);
847: if (!cp || *cp++ != ' ')
1.1 deraadt 848: SCREWUP("mtime.usec not delimited");
1.66 stevesk 849: atime.tv_sec = strtol(cp, &cp, 10);
850: if (!cp || *cp++ != ' ')
1.1 deraadt 851: SCREWUP("atime.sec not delimited");
1.66 stevesk 852: atime.tv_usec = strtol(cp, &cp, 10);
853: if (!cp || *cp++ != '\0')
1.1 deraadt 854: SCREWUP("atime.usec not delimited");
1.107 deraadt 855: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 856: continue;
857: }
858: if (*cp != 'C' && *cp != 'D') {
859: /*
860: * Check for the case "rcp remote:foo\* local:bar".
861: * In this case, the line "No match." can be returned
862: * by the shell before the rcp command on the remote is
863: * executed so the ^Aerror_message convention isn't
864: * followed.
865: */
866: if (first) {
867: run_err("%s", cp);
868: exit(1);
869: }
870: SCREWUP("expected control record");
871: }
872: mode = 0;
873: for (++cp; cp < buf + 5; cp++) {
874: if (*cp < '0' || *cp > '7')
875: SCREWUP("bad mode");
876: mode = (mode << 3) | (*cp - '0');
877: }
878: if (*cp++ != ' ')
879: SCREWUP("mode not delimited");
880:
1.63 stevesk 881: for (size = 0; isdigit(*cp);)
1.1 deraadt 882: size = size * 10 + (*cp++ - '0');
883: if (*cp++ != ' ')
884: SCREWUP("size not delimited");
1.114 markus 885: if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) {
886: run_err("error: unexpected filename: %s", cp);
887: exit(1);
888: }
1.1 deraadt 889: if (targisdir) {
890: static char *namebuf;
1.124 djm 891: static size_t cursize;
1.1 deraadt 892: size_t need;
893:
894: need = strlen(targ) + strlen(cp) + 250;
1.55 deraadt 895: if (need > cursize) {
1.58 danh 896: if (namebuf)
897: xfree(namebuf);
1.18 markus 898: namebuf = xmalloc(need);
1.55 deraadt 899: cursize = need;
900: }
901: (void) snprintf(namebuf, need, "%s%s%s", targ,
1.88 mouring 902: strcmp(targ, "/") ? "/" : "", cp);
1.1 deraadt 903: np = namebuf;
904: } else
905: np = targ;
1.12 aaron 906: curfile = cp;
1.1 deraadt 907: exists = stat(np, &stb) == 0;
908: if (buf[0] == 'D') {
909: int mod_flag = pflag;
1.114 markus 910: if (!iamrecursive)
911: SCREWUP("received directory without -r");
1.1 deraadt 912: if (exists) {
913: if (!S_ISDIR(stb.st_mode)) {
914: errno = ENOTDIR;
915: goto bad;
916: }
917: if (pflag)
1.18 markus 918: (void) chmod(np, mode);
1.1 deraadt 919: } else {
1.18 markus 920: /* Handle copying from a read-only
921: directory */
1.1 deraadt 922: mod_flag = 1;
923: if (mkdir(np, mode | S_IRWXU) < 0)
924: goto bad;
925: }
1.58 danh 926: vect[0] = xstrdup(np);
1.1 deraadt 927: sink(1, vect);
928: if (setimes) {
929: setimes = 0;
1.59 deraadt 930: if (utimes(vect[0], tv) < 0)
1.18 markus 931: run_err("%s: set times: %s",
1.59 deraadt 932: vect[0], strerror(errno));
1.1 deraadt 933: }
934: if (mod_flag)
1.59 deraadt 935: (void) chmod(vect[0], mode);
936: if (vect[0])
937: xfree(vect[0]);
1.1 deraadt 938: continue;
939: }
940: omode = mode;
941: mode |= S_IWRITE;
1.71 markus 942: if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
1.1 deraadt 943: bad: run_err("%s: %s", np, strerror(errno));
944: continue;
945: }
1.107 deraadt 946: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 947: if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) {
1.18 markus 948: (void) close(ofd);
1.1 deraadt 949: continue;
950: }
951: cp = bp->buf;
952: wrerr = NO;
1.7 deraadt 953:
1.12 aaron 954: statbytes = 0;
1.97 fgsch 955: if (showprogress)
956: start_progress_meter(curfile, size, &statbytes);
1.1 deraadt 957: for (count = i = 0; i < size; i += 4096) {
958: amt = 4096;
959: if (i + amt > size)
960: amt = size - i;
961: count += amt;
962: do {
1.117 avsm 963: j = atomicio(read, remin, cp, amt);
1.122 avsm 964: if (j == 0) {
1.1 deraadt 965: run_err("%s", j ? strerror(errno) :
1.63 stevesk 966: "dropped connection");
1.1 deraadt 967: exit(1);
968: }
969: amt -= j;
970: cp += j;
1.18 markus 971: statbytes += j;
1.1 deraadt 972: } while (amt > 0);
1.112 djm 973:
1.113 djm 974: if (limit_rate)
1.99 markus 975: bwlimit(4096);
976:
1.1 deraadt 977: if (count == bp->cnt) {
978: /* Keep reading so we stay sync'd up. */
979: if (wrerr == NO) {
1.122 avsm 980: if (atomicio(vwrite, ofd, bp->buf,
981: count) != count) {
1.1 deraadt 982: wrerr = YES;
1.122 avsm 983: wrerrno = errno;
1.1 deraadt 984: }
985: }
986: count = 0;
987: cp = bp->buf;
988: }
989: }
1.7 deraadt 990: if (showprogress)
1.97 fgsch 991: stop_progress_meter();
1.1 deraadt 992: if (count != 0 && wrerr == NO &&
1.122 avsm 993: atomicio(vwrite, ofd, bp->buf, count) != count) {
1.1 deraadt 994: wrerr = YES;
1.122 avsm 995: wrerrno = errno;
1.1 deraadt 996: }
1.98 djm 997: if (wrerr == NO && ftruncate(ofd, size) != 0) {
1.1 deraadt 998: run_err("%s: truncate: %s", np, strerror(errno));
999: wrerr = DISPLAYED;
1000: }
1001: if (pflag) {
1002: if (exists || omode != mode)
1.116 dtucker 1003: if (fchmod(ofd, omode)) {
1.1 deraadt 1004: run_err("%s: set mode: %s",
1.63 stevesk 1005: np, strerror(errno));
1.116 dtucker 1006: wrerr = DISPLAYED;
1007: }
1.1 deraadt 1008: } else {
1009: if (!exists && omode != mode)
1.116 dtucker 1010: if (fchmod(ofd, omode & ~mask)) {
1.1 deraadt 1011: run_err("%s: set mode: %s",
1.63 stevesk 1012: np, strerror(errno));
1.116 dtucker 1013: wrerr = DISPLAYED;
1014: }
1.1 deraadt 1015: }
1.33 provos 1016: if (close(ofd) == -1) {
1017: wrerr = YES;
1018: wrerrno = errno;
1019: }
1.18 markus 1020: (void) response();
1.1 deraadt 1021: if (setimes && wrerr == NO) {
1022: setimes = 0;
1.40 markus 1023: if (utimes(np, tv) < 0) {
1.1 deraadt 1024: run_err("%s: set times: %s",
1.63 stevesk 1025: np, strerror(errno));
1.1 deraadt 1026: wrerr = DISPLAYED;
1027: }
1028: }
1.18 markus 1029: switch (wrerr) {
1.1 deraadt 1030: case YES:
1031: run_err("%s: %s", np, strerror(wrerrno));
1032: break;
1033: case NO:
1.107 deraadt 1034: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 1035: break;
1036: case DISPLAYED:
1037: break;
1038: }
1039: }
1040: screwup:
1041: run_err("protocol error: %s", why);
1042: exit(1);
1043: }
1044:
1045: int
1.86 itojun 1046: response(void)
1.1 deraadt 1047: {
1048: char ch, *cp, resp, rbuf[2048];
1049:
1.30 deraadt 1050: if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp))
1.1 deraadt 1051: lostconn(0);
1052:
1053: cp = rbuf;
1.18 markus 1054: switch (resp) {
1055: case 0: /* ok */
1.1 deraadt 1056: return (0);
1057: default:
1058: *cp++ = resp;
1059: /* FALLTHROUGH */
1.18 markus 1060: case 1: /* error, followed by error msg */
1061: case 2: /* fatal error, "" */
1.1 deraadt 1062: do {
1.30 deraadt 1063: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 1064: lostconn(0);
1065: *cp++ = ch;
1066: } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
1067:
1068: if (!iamremote)
1.107 deraadt 1069: (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf);
1.1 deraadt 1070: ++errs;
1071: if (resp == 1)
1072: return (-1);
1073: exit(1);
1074: }
1075: /* NOTREACHED */
1076: }
1077:
1078: void
1.86 itojun 1079: usage(void)
1.1 deraadt 1080: {
1.83 stevesk 1081: (void) fprintf(stderr,
1.110 jmc 1082: "usage: scp [-1246BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n"
1083: " [-l limit] [-o ssh_option] [-P port] [-S program]\n"
1.90 deraadt 1084: " [[user@]host1:]file1 [...] [[user@]host2:]file2\n");
1.1 deraadt 1085: exit(1);
1086: }
1087:
1088: void
1.18 markus 1089: run_err(const char *fmt,...)
1.1 deraadt 1090: {
1091: static FILE *fp;
1092: va_list ap;
1093:
1094: ++errs;
1.136 ! biorn 1095: if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) {
! 1096: (void) fprintf(fp, "%c", 0x01);
! 1097: (void) fprintf(fp, "scp: ");
! 1098: va_start(ap, fmt);
! 1099: (void) vfprintf(fp, fmt, ap);
! 1100: va_end(ap);
! 1101: (void) fprintf(fp, "\n");
! 1102: (void) fflush(fp);
! 1103: }
1.18 markus 1104:
1105: if (!iamremote) {
1.73 markus 1106: va_start(ap, fmt);
1.18 markus 1107: vfprintf(stderr, fmt, ap);
1.73 markus 1108: va_end(ap);
1.18 markus 1109: fprintf(stderr, "\n");
1110: }
1.1 deraadt 1111: }
1112:
1113: void
1.104 djm 1114: verifydir(char *cp)
1.1 deraadt 1115: {
1116: struct stat stb;
1117:
1118: if (!stat(cp, &stb)) {
1119: if (S_ISDIR(stb.st_mode))
1120: return;
1121: errno = ENOTDIR;
1122: }
1123: run_err("%s: %s", cp, strerror(errno));
1.123 avsm 1124: killchild(0);
1.1 deraadt 1125: }
1126:
1127: int
1.104 djm 1128: okname(char *cp0)
1.1 deraadt 1129: {
1130: int c;
1131: char *cp;
1132:
1133: cp = cp0;
1134: do {
1.75 deraadt 1135: c = (int)*cp;
1.1 deraadt 1136: if (c & 0200)
1137: goto bad;
1.101 markus 1138: if (!isalpha(c) && !isdigit(c)) {
1139: switch (c) {
1140: case '\'':
1141: case '"':
1142: case '`':
1143: case ' ':
1144: case '#':
1145: goto bad;
1146: default:
1147: break;
1148: }
1149: }
1.1 deraadt 1150: } while (*++cp);
1151: return (1);
1152:
1.25 markus 1153: bad: fprintf(stderr, "%s: invalid user name\n", cp0);
1.1 deraadt 1154: return (0);
1155: }
1156:
1157: BUF *
1.104 djm 1158: allocbuf(BUF *bp, int fd, int blksize)
1.1 deraadt 1159: {
1160: size_t size;
1161: struct stat stb;
1162:
1163: if (fstat(fd, &stb) < 0) {
1164: run_err("fstat: %s", strerror(errno));
1165: return (0);
1166: }
1.95 markus 1167: size = roundup(stb.st_blksize, blksize);
1168: if (size == 0)
1.18 markus 1169: size = blksize;
1.1 deraadt 1170: if (bp->cnt >= size)
1171: return (bp);
1.18 markus 1172: if (bp->buf == NULL)
1173: bp->buf = xmalloc(size);
1174: else
1175: bp->buf = xrealloc(bp->buf, size);
1.81 markus 1176: memset(bp->buf, 0, size);
1.1 deraadt 1177: bp->cnt = size;
1178: return (bp);
1179: }
1180:
1181: void
1.104 djm 1182: lostconn(int signo)
1.1 deraadt 1183: {
1184: if (!iamremote)
1.74 markus 1185: write(STDERR_FILENO, "lost connection\n", 16);
1186: if (signo)
1187: _exit(1);
1188: else
1189: exit(1);
1.4 aaron 1190: }
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