Annotation of src/usr.bin/ssh/scp.c, Revision 1.138
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"
1.132 stevesk 74:
75: #include <sys/types.h>
76: #include <sys/wait.h>
1.134 stevesk 77: #include <sys/stat.h>
1.131 stevesk 78:
1.135 stevesk 79: #include <ctype.h>
1.131 stevesk 80: #include <dirent.h>
1.133 stevesk 81: #include <signal.h>
1.1 deraadt 82:
83: #include "xmalloc.h"
1.51 markus 84: #include "atomicio.h"
1.50 markus 85: #include "pathnames.h"
1.51 markus 86: #include "log.h"
1.69 mouring 87: #include "misc.h"
1.97 fgsch 88: #include "progressmeter.h"
1.1 deraadt 89:
1.35 deraadt 90: int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout, int argc);
1.11 aaron 91:
1.99 markus 92: void bwlimit(int);
93:
1.70 mouring 94: /* Struct for addargs */
95: arglist args;
1.41 markus 96:
1.99 markus 97: /* Bandwidth limit */
1.113 djm 98: off_t limit_rate = 0;
1.99 markus 99:
1.11 aaron 100: /* Name of current file being transferred. */
101: char *curfile;
1.4 aaron 102:
1.1 deraadt 103: /* This is set to non-zero to enable verbose mode. */
1.17 markus 104: int verbose_mode = 0;
1.1 deraadt 105:
1.6 aaron 106: /* This is set to zero if the progressmeter is not desired. */
107: int showprogress = 1;
108:
1.34 deraadt 109: /* This is the program to execute for the secured connection. ("ssh" or -S) */
1.50 markus 110: char *ssh_program = _PATH_SSH_PROGRAM;
1.34 deraadt 111:
1.92 markus 112: /* This is used to store the pid of ssh_program */
1.105 djm 113: pid_t do_cmd_pid = -1;
114:
115: static void
116: killchild(int signo)
117: {
1.119 dtucker 118: if (do_cmd_pid > 1) {
1.123 avsm 119: kill(do_cmd_pid, signo ? signo : SIGTERM);
1.119 dtucker 120: waitpid(do_cmd_pid, NULL, 0);
121: }
1.105 djm 122:
1.123 avsm 123: if (signo)
124: _exit(1);
125: exit(1);
1.105 djm 126: }
1.92 markus 127:
1.129 djm 128: static int
129: do_local_cmd(arglist *a)
130: {
131: u_int i;
132: int status;
133: pid_t pid;
134:
135: if (a->num == 0)
136: fatal("do_local_cmd: no arguments");
137:
138: if (verbose_mode) {
139: fprintf(stderr, "Executing:");
140: for (i = 0; i < a->num; i++)
141: fprintf(stderr, " %s", a->list[i]);
142: fprintf(stderr, "\n");
143: }
144: if ((pid = fork()) == -1)
145: fatal("do_local_cmd: fork: %s", strerror(errno));
146:
147: if (pid == 0) {
148: execvp(a->list[0], a->list);
149: perror(a->list[0]);
150: exit(1);
151: }
152:
153: do_cmd_pid = pid;
154: signal(SIGTERM, killchild);
155: signal(SIGINT, killchild);
156: signal(SIGHUP, killchild);
157:
158: while (waitpid(pid, &status, 0) == -1)
159: if (errno != EINTR)
160: fatal("do_local_cmd: waitpid: %s", strerror(errno));
161:
162: do_cmd_pid = -1;
163:
164: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
165: return (-1);
166:
167: return (0);
168: }
169:
1.20 markus 170: /*
171: * This function executes the given command as the specified user on the
172: * given host. This returns < 0 if execution fails, and >= 0 otherwise. This
173: * assigns the input and output file descriptors on success.
174: */
1.1 deraadt 175:
1.27 markus 176: int
1.35 deraadt 177: do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout, int argc)
1.1 deraadt 178: {
1.18 markus 179: int pin[2], pout[2], reserved[2];
180:
181: if (verbose_mode)
1.78 deraadt 182: fprintf(stderr,
183: "Executing: program %s host %s, user %s, command %s\n",
184: ssh_program, host,
185: remuser ? remuser : "(unspecified)", cmd);
1.18 markus 186:
1.20 markus 187: /*
188: * Reserve two descriptors so that the real pipes won't get
189: * descriptors 0 and 1 because that will screw up dup2 below.
190: */
1.18 markus 191: pipe(reserved);
192:
193: /* Create a socket pair for communicating with ssh. */
194: if (pipe(pin) < 0)
195: fatal("pipe: %s", strerror(errno));
196: if (pipe(pout) < 0)
197: fatal("pipe: %s", strerror(errno));
198:
199: /* Free the reserved descriptors. */
200: close(reserved[0]);
201: close(reserved[1]);
202:
1.106 nino 203: /* Fork a child to execute the command on the remote host using ssh. */
1.92 markus 204: do_cmd_pid = fork();
205: if (do_cmd_pid == 0) {
1.18 markus 206: /* Child. */
207: close(pin[1]);
208: close(pout[0]);
209: dup2(pin[0], 0);
210: dup2(pout[1], 1);
211: close(pin[0]);
212: close(pout[1]);
213:
1.129 djm 214: replacearg(&args, 0, "%s", ssh_program);
1.41 markus 215: if (remuser != NULL)
1.70 mouring 216: addargs(&args, "-l%s", remuser);
217: addargs(&args, "%s", host);
218: addargs(&args, "%s", cmd);
1.18 markus 219:
1.41 markus 220: execvp(ssh_program, args.list);
1.34 deraadt 221: perror(ssh_program);
1.18 markus 222: exit(1);
1.92 markus 223: } else if (do_cmd_pid == -1) {
224: fatal("fork: %s", strerror(errno));
1.18 markus 225: }
226: /* Parent. Close the other side, and return the local side. */
227: close(pin[0]);
228: *fdout = pin[1];
229: close(pout[1]);
230: *fdin = pout[0];
1.105 djm 231: signal(SIGTERM, killchild);
232: signal(SIGINT, killchild);
233: signal(SIGHUP, killchild);
1.18 markus 234: return 0;
1.1 deraadt 235: }
236:
237: typedef struct {
1.124 djm 238: size_t cnt;
1.1 deraadt 239: char *buf;
240: } BUF;
241:
1.18 markus 242: BUF *allocbuf(BUF *, int, int);
243: void lostconn(int);
244: void nospace(void);
245: int okname(char *);
246: void run_err(const char *,...);
247: void verifydir(char *);
1.1 deraadt 248:
249: struct passwd *pwd;
1.18 markus 250: uid_t userid;
1.1 deraadt 251: int errs, remin, remout;
252: int pflag, iamremote, iamrecursive, targetshouldbedirectory;
253:
254: #define CMDNEEDS 64
255: char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
256:
1.18 markus 257: int response(void);
258: void rsource(char *, struct stat *);
259: void sink(int, char *[]);
260: void source(int, char *[]);
261: void tolocal(int, char *[]);
262: void toremote(char *, int, char *[]);
263: void usage(void);
1.1 deraadt 264:
265: int
1.104 djm 266: main(int argc, char **argv)
1.1 deraadt 267: {
1.92 markus 268: int ch, fflag, tflag, status;
1.99 markus 269: double speed;
270: char *targ, *endp;
1.1 deraadt 271: extern char *optarg;
272: extern int optind;
1.126 djm 273:
274: /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
275: sanitise_stdfd();
1.1 deraadt 276:
1.129 djm 277: memset(&args, '\0', sizeof(args));
1.41 markus 278: args.list = NULL;
1.129 djm 279: addargs(&args, "%s", ssh_program);
1.70 mouring 280: addargs(&args, "-x");
1.82 stevesk 281: addargs(&args, "-oForwardAgent no");
1.128 reyk 282: addargs(&args, "-oPermitLocalCommand no");
1.84 stevesk 283: addargs(&args, "-oClearAllForwardings yes");
1.41 markus 284:
1.1 deraadt 285: fflag = tflag = 0;
1.100 markus 286: while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q1246S:o:F:")) != -1)
1.18 markus 287: switch (ch) {
288: /* User-visible flags. */
1.100 markus 289: case '1':
290: case '2':
1.23 markus 291: case '4':
1.41 markus 292: case '6':
293: case 'C':
1.70 mouring 294: addargs(&args, "-%c", ch);
1.41 markus 295: break;
296: case 'o':
297: case 'c':
298: case 'i':
1.83 stevesk 299: case 'F':
1.70 mouring 300: addargs(&args, "-%c%s", ch, optarg);
1.23 markus 301: break;
1.41 markus 302: case 'P':
1.70 mouring 303: addargs(&args, "-p%s", optarg);
1.41 markus 304: break;
305: case 'B':
1.70 mouring 306: addargs(&args, "-oBatchmode yes");
1.23 markus 307: break;
1.99 markus 308: case 'l':
309: speed = strtod(optarg, &endp);
310: if (speed <= 0 || *endp != '\0')
311: usage();
1.113 djm 312: limit_rate = speed * 1024;
1.99 markus 313: break;
1.1 deraadt 314: case 'p':
315: pflag = 1;
316: break;
317: case 'r':
318: iamrecursive = 1;
319: break;
1.34 deraadt 320: case 'S':
1.41 markus 321: ssh_program = xstrdup(optarg);
322: break;
323: case 'v':
1.72 markus 324: addargs(&args, "-v");
1.41 markus 325: verbose_mode = 1;
326: break;
327: case 'q':
1.111 dtucker 328: addargs(&args, "-q");
1.41 markus 329: showprogress = 0;
1.34 deraadt 330: break;
331:
1.18 markus 332: /* Server options. */
1.1 deraadt 333: case 'd':
334: targetshouldbedirectory = 1;
335: break;
1.18 markus 336: case 'f': /* "from" */
1.1 deraadt 337: iamremote = 1;
338: fflag = 1;
339: break;
1.18 markus 340: case 't': /* "to" */
1.1 deraadt 341: iamremote = 1;
342: tflag = 1;
343: break;
344: default:
345: usage();
346: }
347: argc -= optind;
348: argv += optind;
349:
350: if ((pwd = getpwuid(userid = getuid())) == NULL)
1.108 deraadt 351: fatal("unknown user %u", (u_int) userid);
1.1 deraadt 352:
1.18 markus 353: if (!isatty(STDERR_FILENO))
1.7 deraadt 354: showprogress = 0;
355:
1.1 deraadt 356: remin = STDIN_FILENO;
357: remout = STDOUT_FILENO;
358:
1.52 stevesk 359: if (fflag) {
1.18 markus 360: /* Follow "protocol", send data. */
361: (void) response();
1.1 deraadt 362: source(argc, argv);
363: exit(errs != 0);
364: }
1.18 markus 365: if (tflag) {
366: /* Receive data. */
1.1 deraadt 367: sink(argc, argv);
368: exit(errs != 0);
369: }
370: if (argc < 2)
371: usage();
372: if (argc > 2)
373: targetshouldbedirectory = 1;
374:
375: remin = remout = -1;
1.92 markus 376: do_cmd_pid = -1;
1.1 deraadt 377: /* Command to be executed on remote system using "ssh". */
1.55 deraadt 378: (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
379: verbose_mode ? " -v" : "",
1.35 deraadt 380: iamrecursive ? " -r" : "", pflag ? " -p" : "",
381: targetshouldbedirectory ? " -d" : "");
1.1 deraadt 382:
1.18 markus 383: (void) signal(SIGPIPE, lostconn);
1.1 deraadt 384:
385: if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */
386: toremote(targ, argc, argv);
387: else {
388: if (targetshouldbedirectory)
389: verifydir(argv[argc - 1]);
1.130 djm 390: tolocal(argc, argv); /* Dest is local host. */
1.92 markus 391: }
392: /*
393: * Finally check the exit status of the ssh process, if one was forked
394: * and no error has occured yet
395: */
396: if (do_cmd_pid != -1 && errs == 0) {
397: if (remin != -1)
398: (void) close(remin);
399: if (remout != -1)
400: (void) close(remout);
401: if (waitpid(do_cmd_pid, &status, 0) == -1)
402: errs = 1;
403: else {
404: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
405: errs = 1;
406: }
1.1 deraadt 407: }
408: exit(errs != 0);
409: }
410:
411: void
1.104 djm 412: toremote(char *targ, int argc, char **argv)
1.1 deraadt 413: {
414: int i, len;
1.120 deraadt 415: char *bp, *host, *src, *suser, *thost, *tuser, *arg;
1.129 djm 416: arglist alist;
417:
418: memset(&alist, '\0', sizeof(alist));
419: alist.list = NULL;
1.1 deraadt 420:
421: *targ++ = 0;
422: if (*targ == 0)
423: targ = ".";
424:
1.121 djm 425: arg = xstrdup(argv[argc - 1]);
1.120 deraadt 426: if ((thost = strrchr(arg, '@'))) {
1.1 deraadt 427: /* user@host */
428: *thost++ = 0;
1.120 deraadt 429: tuser = arg;
1.1 deraadt 430: if (*tuser == '\0')
431: tuser = NULL;
432: } else {
1.120 deraadt 433: thost = arg;
1.1 deraadt 434: tuser = NULL;
435: }
436:
1.129 djm 437: if (tuser != NULL && !okname(tuser)) {
438: xfree(arg);
439: return;
440: }
441:
1.1 deraadt 442: for (i = 0; i < argc - 1; i++) {
443: src = colon(argv[i]);
1.18 markus 444: if (src) { /* remote to remote */
1.129 djm 445: freeargs(&alist);
446: addargs(&alist, "%s", ssh_program);
447: if (verbose_mode)
448: addargs(&alist, "-v");
449: addargs(&alist, "-x");
450: addargs(&alist, "-oClearAllForwardings yes");
451: addargs(&alist, "-n");
452:
1.1 deraadt 453: *src++ = 0;
454: if (*src == 0)
455: src = ".";
1.94 markus 456: host = strrchr(argv[i], '@');
1.129 djm 457:
1.1 deraadt 458: if (host) {
459: *host++ = 0;
1.23 markus 460: host = cleanhostname(host);
1.1 deraadt 461: suser = argv[i];
462: if (*suser == '\0')
463: suser = pwd->pw_name;
1.129 djm 464: else if (!okname(suser))
1.101 markus 465: continue;
1.129 djm 466: addargs(&alist, "-l");
467: addargs(&alist, "%s", suser);
1.23 markus 468: } else {
469: host = cleanhostname(argv[i]);
470: }
1.129 djm 471: addargs(&alist, "%s", host);
472: addargs(&alist, "%s", cmd);
473: addargs(&alist, "%s", src);
474: addargs(&alist, "%s%s%s:%s",
475: tuser ? tuser : "", tuser ? "@" : "",
476: thost, targ);
477: if (do_local_cmd(&alist) != 0)
1.109 markus 478: errs = 1;
1.18 markus 479: } else { /* local to remote */
1.1 deraadt 480: if (remin == -1) {
481: len = strlen(targ) + CMDNEEDS + 20;
1.18 markus 482: bp = xmalloc(len);
1.55 deraadt 483: (void) snprintf(bp, len, "%s -t %s", cmd, targ);
1.23 markus 484: host = cleanhostname(thost);
1.35 deraadt 485: if (do_cmd(host, tuser, bp, &remin,
486: &remout, argc) < 0)
1.18 markus 487: exit(1);
1.1 deraadt 488: if (response() < 0)
489: exit(1);
1.18 markus 490: (void) xfree(bp);
1.1 deraadt 491: }
1.18 markus 492: source(1, argv + i);
1.1 deraadt 493: }
494: }
495: }
496:
497: void
1.104 djm 498: tolocal(int argc, char **argv)
1.1 deraadt 499: {
500: int i, len;
501: char *bp, *host, *src, *suser;
1.129 djm 502: arglist alist;
503:
504: memset(&alist, '\0', sizeof(alist));
505: alist.list = NULL;
1.1 deraadt 506:
507: for (i = 0; i < argc - 1; i++) {
1.18 markus 508: if (!(src = colon(argv[i]))) { /* Local to local. */
1.129 djm 509: freeargs(&alist);
510: addargs(&alist, "%s", _PATH_CP);
511: if (iamrecursive)
512: addargs(&alist, "-r");
513: if (pflag)
514: addargs(&alist, "-p");
515: addargs(&alist, "%s", argv[i]);
516: addargs(&alist, "%s", argv[argc-1]);
517: if (do_local_cmd(&alist))
1.1 deraadt 518: ++errs;
519: continue;
520: }
521: *src++ = 0;
522: if (*src == 0)
523: src = ".";
1.94 markus 524: if ((host = strrchr(argv[i], '@')) == NULL) {
1.1 deraadt 525: host = argv[i];
526: suser = NULL;
527: } else {
528: *host++ = 0;
529: suser = argv[i];
530: if (*suser == '\0')
531: suser = pwd->pw_name;
532: }
1.23 markus 533: host = cleanhostname(host);
1.1 deraadt 534: len = strlen(src) + CMDNEEDS + 20;
1.18 markus 535: bp = xmalloc(len);
1.55 deraadt 536: (void) snprintf(bp, len, "%s -f %s", cmd, src);
1.35 deraadt 537: if (do_cmd(host, suser, bp, &remin, &remout, argc) < 0) {
1.18 markus 538: (void) xfree(bp);
539: ++errs;
540: continue;
1.1 deraadt 541: }
1.18 markus 542: xfree(bp);
1.1 deraadt 543: sink(1, argv + argc - 1);
1.18 markus 544: (void) close(remin);
1.1 deraadt 545: remin = remout = -1;
546: }
547: }
548:
549: void
1.104 djm 550: source(int argc, char **argv)
1.1 deraadt 551: {
552: struct stat stb;
553: static BUF buffer;
554: BUF *bp;
1.122 avsm 555: off_t i, amt, statbytes;
556: size_t result;
1.125 dtucker 557: int fd = -1, haderr, indx;
1.1 deraadt 558: char *last, *name, buf[2048];
1.65 deraadt 559: int len;
1.1 deraadt 560:
561: for (indx = 0; indx < argc; ++indx) {
1.18 markus 562: name = argv[indx];
1.11 aaron 563: statbytes = 0;
1.65 deraadt 564: len = strlen(name);
565: while (len > 1 && name[len-1] == '/')
566: name[--len] = '\0';
1.85 markus 567: if (strchr(name, '\n') != NULL) {
568: run_err("%s: skipping, filename contains a newline",
569: name);
570: goto next;
571: }
1.1 deraadt 572: if ((fd = open(name, O_RDONLY, 0)) < 0)
573: goto syserr;
574: if (fstat(fd, &stb) < 0) {
575: syserr: run_err("%s: %s", name, strerror(errno));
576: goto next;
577: }
578: switch (stb.st_mode & S_IFMT) {
579: case S_IFREG:
580: break;
581: case S_IFDIR:
582: if (iamrecursive) {
583: rsource(name, &stb);
584: goto next;
585: }
586: /* FALLTHROUGH */
587: default:
588: run_err("%s: not a regular file", name);
589: goto next;
590: }
591: if ((last = strrchr(name, '/')) == NULL)
592: last = name;
593: else
594: ++last;
1.11 aaron 595: curfile = last;
1.1 deraadt 596: if (pflag) {
597: /*
598: * Make it compatible with possible future
599: * versions expecting microseconds.
600: */
1.55 deraadt 601: (void) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n",
1.47 markus 602: (u_long) stb.st_mtime,
603: (u_long) stb.st_atime);
1.107 deraadt 604: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 605: if (response() < 0)
606: goto next;
607: }
608: #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
1.61 markus 609: snprintf(buf, sizeof buf, "C%04o %lld %s\n",
1.47 markus 610: (u_int) (stb.st_mode & FILEMODEMASK),
1.62 markus 611: (long long)stb.st_size, last);
1.18 markus 612: if (verbose_mode) {
613: fprintf(stderr, "Sending file modes: %s", buf);
614: }
1.107 deraadt 615: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 616: if (response() < 0)
617: goto next;
618: if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) {
1.127 deraadt 619: next: if (fd != -1) {
620: (void) close(fd);
621: fd = -1;
622: }
1.1 deraadt 623: continue;
624: }
1.97 fgsch 625: if (showprogress)
626: start_progress_meter(curfile, stb.st_size, &statbytes);
1.1 deraadt 627: /* Keep writing after an error so that we stay sync'd up. */
628: for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
629: amt = bp->cnt;
630: if (i + amt > stb.st_size)
631: amt = stb.st_size - i;
632: if (!haderr) {
1.30 deraadt 633: result = atomicio(read, fd, bp->buf, amt);
1.1 deraadt 634: if (result != amt)
1.122 avsm 635: haderr = errno;
1.1 deraadt 636: }
637: if (haderr)
1.107 deraadt 638: (void) atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 639: else {
1.107 deraadt 640: result = atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 641: if (result != amt)
1.122 avsm 642: haderr = errno;
1.4 aaron 643: statbytes += result;
1.1 deraadt 644: }
1.113 djm 645: if (limit_rate)
1.99 markus 646: bwlimit(amt);
1.1 deraadt 647: }
1.18 markus 648: if (showprogress)
1.97 fgsch 649: stop_progress_meter();
1.4 aaron 650:
1.127 deraadt 651: if (fd != -1) {
652: if (close(fd) < 0 && !haderr)
653: haderr = errno;
654: fd = -1;
655: }
1.1 deraadt 656: if (!haderr)
1.107 deraadt 657: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 658: else
659: run_err("%s: %s", name, strerror(haderr));
1.18 markus 660: (void) response();
1.1 deraadt 661: }
662: }
663:
664: void
1.104 djm 665: rsource(char *name, struct stat *statp)
1.1 deraadt 666: {
667: DIR *dirp;
668: struct dirent *dp;
669: char *last, *vect[1], path[1100];
670:
671: if (!(dirp = opendir(name))) {
672: run_err("%s: %s", name, strerror(errno));
673: return;
674: }
675: last = strrchr(name, '/');
676: if (last == 0)
677: last = name;
678: else
679: last++;
680: if (pflag) {
1.55 deraadt 681: (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n",
1.47 markus 682: (u_long) statp->st_mtime,
683: (u_long) statp->st_atime);
1.107 deraadt 684: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 685: if (response() < 0) {
686: closedir(dirp);
687: return;
688: }
689: }
1.55 deraadt 690: (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n",
1.47 markus 691: (u_int) (statp->st_mode & FILEMODEMASK), 0, last);
1.18 markus 692: if (verbose_mode)
693: fprintf(stderr, "Entering directory: %s", path);
1.107 deraadt 694: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 695: if (response() < 0) {
696: closedir(dirp);
697: return;
698: }
1.63 stevesk 699: while ((dp = readdir(dirp)) != NULL) {
1.1 deraadt 700: if (dp->d_ino == 0)
701: continue;
702: if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
703: continue;
704: if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) {
705: run_err("%s/%s: name too long", name, dp->d_name);
706: continue;
707: }
1.55 deraadt 708: (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name);
1.1 deraadt 709: vect[0] = path;
710: source(1, vect);
711: }
1.18 markus 712: (void) closedir(dirp);
1.107 deraadt 713: (void) atomicio(vwrite, remout, "E\n", 2);
1.18 markus 714: (void) response();
1.1 deraadt 715: }
716:
717: void
1.99 markus 718: bwlimit(int amount)
719: {
720: static struct timeval bwstart, bwend;
721: static int lamt, thresh = 16384;
1.115 avsm 722: u_int64_t waitlen;
1.99 markus 723: struct timespec ts, rm;
724:
725: if (!timerisset(&bwstart)) {
726: gettimeofday(&bwstart, NULL);
727: return;
728: }
729:
730: lamt += amount;
731: if (lamt < thresh)
732: return;
733:
734: gettimeofday(&bwend, NULL);
735: timersub(&bwend, &bwstart, &bwend);
736: if (!timerisset(&bwend))
737: return;
738:
739: lamt *= 8;
1.115 avsm 740: waitlen = (double)1000000L * lamt / limit_rate;
1.99 markus 741:
1.115 avsm 742: bwstart.tv_sec = waitlen / 1000000L;
743: bwstart.tv_usec = waitlen % 1000000L;
1.99 markus 744:
745: if (timercmp(&bwstart, &bwend, >)) {
746: timersub(&bwstart, &bwend, &bwend);
747:
748: /* Adjust the wait time */
749: if (bwend.tv_sec) {
750: thresh /= 2;
751: if (thresh < 2048)
752: thresh = 2048;
753: } else if (bwend.tv_usec < 100) {
754: thresh *= 2;
755: if (thresh > 32768)
756: thresh = 32768;
757: }
758:
759: TIMEVAL_TO_TIMESPEC(&bwend, &ts);
760: while (nanosleep(&ts, &rm) == -1) {
761: if (errno != EINTR)
762: break;
763: ts = rm;
764: }
765: }
766:
767: lamt = 0;
768: gettimeofday(&bwstart, NULL);
769: }
770:
771: void
1.104 djm 772: sink(int argc, char **argv)
1.1 deraadt 773: {
774: static BUF buffer;
775: struct stat stb;
1.18 markus 776: enum {
777: YES, NO, DISPLAYED
778: } wrerr;
1.1 deraadt 779: BUF *bp;
1.122 avsm 780: off_t i;
1.124 djm 781: size_t j, count;
782: int amt, exists, first, mask, mode, ofd, omode;
1.97 fgsch 783: off_t size, statbytes;
1.36 deraadt 784: int setimes, targisdir, wrerrno = 0;
1.1 deraadt 785: char ch, *cp, *np, *targ, *why, *vect[1], buf[2048];
1.40 markus 786: struct timeval tv[2];
1.1 deraadt 787:
1.66 stevesk 788: #define atime tv[0]
789: #define mtime tv[1]
1.118 deraadt 790: #define SCREWUP(str) { why = str; goto screwup; }
1.1 deraadt 791:
792: setimes = targisdir = 0;
793: mask = umask(0);
794: if (!pflag)
1.18 markus 795: (void) umask(mask);
1.1 deraadt 796: if (argc != 1) {
797: run_err("ambiguous target");
798: exit(1);
799: }
800: targ = *argv;
801: if (targetshouldbedirectory)
802: verifydir(targ);
1.18 markus 803:
1.107 deraadt 804: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 805: if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
806: targisdir = 1;
807: for (first = 1;; first = 0) {
808: cp = buf;
1.122 avsm 809: if (atomicio(read, remin, cp, 1) != 1)
1.1 deraadt 810: return;
811: if (*cp++ == '\n')
812: SCREWUP("unexpected <newline>");
813: do {
1.30 deraadt 814: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 815: SCREWUP("lost connection");
816: *cp++ = ch;
817: } while (cp < &buf[sizeof(buf) - 1] && ch != '\n');
818: *cp = 0;
1.114 markus 819: if (verbose_mode)
820: fprintf(stderr, "Sink: %s", buf);
1.1 deraadt 821:
822: if (buf[0] == '\01' || buf[0] == '\02') {
823: if (iamremote == 0)
1.107 deraadt 824: (void) atomicio(vwrite, STDERR_FILENO,
1.44 deraadt 825: buf + 1, strlen(buf + 1));
1.1 deraadt 826: if (buf[0] == '\02')
827: exit(1);
828: ++errs;
829: continue;
830: }
831: if (buf[0] == 'E') {
1.107 deraadt 832: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 833: return;
834: }
835: if (ch == '\n')
836: *--cp = 0;
837:
838: cp = buf;
839: if (*cp == 'T') {
840: setimes++;
841: cp++;
1.66 stevesk 842: mtime.tv_sec = strtol(cp, &cp, 10);
843: if (!cp || *cp++ != ' ')
1.1 deraadt 844: SCREWUP("mtime.sec not delimited");
1.66 stevesk 845: mtime.tv_usec = strtol(cp, &cp, 10);
846: if (!cp || *cp++ != ' ')
1.1 deraadt 847: SCREWUP("mtime.usec not delimited");
1.66 stevesk 848: atime.tv_sec = strtol(cp, &cp, 10);
849: if (!cp || *cp++ != ' ')
1.1 deraadt 850: SCREWUP("atime.sec not delimited");
1.66 stevesk 851: atime.tv_usec = strtol(cp, &cp, 10);
852: if (!cp || *cp++ != '\0')
1.1 deraadt 853: SCREWUP("atime.usec not delimited");
1.107 deraadt 854: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 855: continue;
856: }
857: if (*cp != 'C' && *cp != 'D') {
858: /*
859: * Check for the case "rcp remote:foo\* local:bar".
860: * In this case, the line "No match." can be returned
861: * by the shell before the rcp command on the remote is
862: * executed so the ^Aerror_message convention isn't
863: * followed.
864: */
865: if (first) {
866: run_err("%s", cp);
867: exit(1);
868: }
869: SCREWUP("expected control record");
870: }
871: mode = 0;
872: for (++cp; cp < buf + 5; cp++) {
873: if (*cp < '0' || *cp > '7')
874: SCREWUP("bad mode");
875: mode = (mode << 3) | (*cp - '0');
876: }
877: if (*cp++ != ' ')
878: SCREWUP("mode not delimited");
879:
1.63 stevesk 880: for (size = 0; isdigit(*cp);)
1.1 deraadt 881: size = size * 10 + (*cp++ - '0');
882: if (*cp++ != ' ')
883: SCREWUP("size not delimited");
1.114 markus 884: if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) {
885: run_err("error: unexpected filename: %s", cp);
886: exit(1);
887: }
1.1 deraadt 888: if (targisdir) {
889: static char *namebuf;
1.124 djm 890: static size_t cursize;
1.1 deraadt 891: size_t need;
892:
893: need = strlen(targ) + strlen(cp) + 250;
1.55 deraadt 894: if (need > cursize) {
1.58 danh 895: if (namebuf)
896: xfree(namebuf);
1.18 markus 897: namebuf = xmalloc(need);
1.55 deraadt 898: cursize = need;
899: }
900: (void) snprintf(namebuf, need, "%s%s%s", targ,
1.88 mouring 901: strcmp(targ, "/") ? "/" : "", cp);
1.1 deraadt 902: np = namebuf;
903: } else
904: np = targ;
1.12 aaron 905: curfile = cp;
1.1 deraadt 906: exists = stat(np, &stb) == 0;
907: if (buf[0] == 'D') {
908: int mod_flag = pflag;
1.114 markus 909: if (!iamrecursive)
910: SCREWUP("received directory without -r");
1.1 deraadt 911: if (exists) {
912: if (!S_ISDIR(stb.st_mode)) {
913: errno = ENOTDIR;
914: goto bad;
915: }
916: if (pflag)
1.18 markus 917: (void) chmod(np, mode);
1.1 deraadt 918: } else {
1.18 markus 919: /* Handle copying from a read-only
920: directory */
1.1 deraadt 921: mod_flag = 1;
922: if (mkdir(np, mode | S_IRWXU) < 0)
923: goto bad;
924: }
1.58 danh 925: vect[0] = xstrdup(np);
1.1 deraadt 926: sink(1, vect);
927: if (setimes) {
928: setimes = 0;
1.59 deraadt 929: if (utimes(vect[0], tv) < 0)
1.18 markus 930: run_err("%s: set times: %s",
1.59 deraadt 931: vect[0], strerror(errno));
1.1 deraadt 932: }
933: if (mod_flag)
1.59 deraadt 934: (void) chmod(vect[0], mode);
935: if (vect[0])
936: xfree(vect[0]);
1.1 deraadt 937: continue;
938: }
939: omode = mode;
940: mode |= S_IWRITE;
1.71 markus 941: if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
1.1 deraadt 942: bad: run_err("%s: %s", np, strerror(errno));
943: continue;
944: }
1.107 deraadt 945: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 946: if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) {
1.18 markus 947: (void) close(ofd);
1.1 deraadt 948: continue;
949: }
950: cp = bp->buf;
951: wrerr = NO;
1.7 deraadt 952:
1.12 aaron 953: statbytes = 0;
1.97 fgsch 954: if (showprogress)
955: start_progress_meter(curfile, size, &statbytes);
1.1 deraadt 956: for (count = i = 0; i < size; i += 4096) {
957: amt = 4096;
958: if (i + amt > size)
959: amt = size - i;
960: count += amt;
961: do {
1.117 avsm 962: j = atomicio(read, remin, cp, amt);
1.122 avsm 963: if (j == 0) {
1.1 deraadt 964: run_err("%s", j ? strerror(errno) :
1.63 stevesk 965: "dropped connection");
1.1 deraadt 966: exit(1);
967: }
968: amt -= j;
969: cp += j;
1.18 markus 970: statbytes += j;
1.1 deraadt 971: } while (amt > 0);
1.112 djm 972:
1.113 djm 973: if (limit_rate)
1.99 markus 974: bwlimit(4096);
975:
1.1 deraadt 976: if (count == bp->cnt) {
977: /* Keep reading so we stay sync'd up. */
978: if (wrerr == NO) {
1.122 avsm 979: if (atomicio(vwrite, ofd, bp->buf,
980: count) != count) {
1.1 deraadt 981: wrerr = YES;
1.122 avsm 982: wrerrno = errno;
1.1 deraadt 983: }
984: }
985: count = 0;
986: cp = bp->buf;
987: }
988: }
1.7 deraadt 989: if (showprogress)
1.97 fgsch 990: stop_progress_meter();
1.1 deraadt 991: if (count != 0 && wrerr == NO &&
1.122 avsm 992: atomicio(vwrite, ofd, bp->buf, count) != count) {
1.1 deraadt 993: wrerr = YES;
1.122 avsm 994: wrerrno = errno;
1.1 deraadt 995: }
1.98 djm 996: if (wrerr == NO && ftruncate(ofd, size) != 0) {
1.1 deraadt 997: run_err("%s: truncate: %s", np, strerror(errno));
998: wrerr = DISPLAYED;
999: }
1000: if (pflag) {
1001: if (exists || omode != mode)
1.116 dtucker 1002: if (fchmod(ofd, omode)) {
1.1 deraadt 1003: run_err("%s: set mode: %s",
1.63 stevesk 1004: np, strerror(errno));
1.116 dtucker 1005: wrerr = DISPLAYED;
1006: }
1.1 deraadt 1007: } else {
1008: if (!exists && omode != mode)
1.116 dtucker 1009: if (fchmod(ofd, omode & ~mask)) {
1.1 deraadt 1010: run_err("%s: set mode: %s",
1.63 stevesk 1011: np, strerror(errno));
1.116 dtucker 1012: wrerr = DISPLAYED;
1013: }
1.1 deraadt 1014: }
1.33 provos 1015: if (close(ofd) == -1) {
1016: wrerr = YES;
1017: wrerrno = errno;
1018: }
1.18 markus 1019: (void) response();
1.1 deraadt 1020: if (setimes && wrerr == NO) {
1021: setimes = 0;
1.40 markus 1022: if (utimes(np, tv) < 0) {
1.1 deraadt 1023: run_err("%s: set times: %s",
1.63 stevesk 1024: np, strerror(errno));
1.1 deraadt 1025: wrerr = DISPLAYED;
1026: }
1027: }
1.18 markus 1028: switch (wrerr) {
1.1 deraadt 1029: case YES:
1030: run_err("%s: %s", np, strerror(wrerrno));
1031: break;
1032: case NO:
1.107 deraadt 1033: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 1034: break;
1035: case DISPLAYED:
1036: break;
1037: }
1038: }
1039: screwup:
1040: run_err("protocol error: %s", why);
1041: exit(1);
1042: }
1043:
1044: int
1.86 itojun 1045: response(void)
1.1 deraadt 1046: {
1047: char ch, *cp, resp, rbuf[2048];
1048:
1.30 deraadt 1049: if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp))
1.1 deraadt 1050: lostconn(0);
1051:
1052: cp = rbuf;
1.18 markus 1053: switch (resp) {
1054: case 0: /* ok */
1.1 deraadt 1055: return (0);
1056: default:
1057: *cp++ = resp;
1058: /* FALLTHROUGH */
1.18 markus 1059: case 1: /* error, followed by error msg */
1060: case 2: /* fatal error, "" */
1.1 deraadt 1061: do {
1.30 deraadt 1062: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 1063: lostconn(0);
1064: *cp++ = ch;
1065: } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
1066:
1067: if (!iamremote)
1.107 deraadt 1068: (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf);
1.1 deraadt 1069: ++errs;
1070: if (resp == 1)
1071: return (-1);
1072: exit(1);
1073: }
1074: /* NOTREACHED */
1075: }
1076:
1077: void
1.86 itojun 1078: usage(void)
1.1 deraadt 1079: {
1.83 stevesk 1080: (void) fprintf(stderr,
1.110 jmc 1081: "usage: scp [-1246BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n"
1082: " [-l limit] [-o ssh_option] [-P port] [-S program]\n"
1.90 deraadt 1083: " [[user@]host1:]file1 [...] [[user@]host2:]file2\n");
1.1 deraadt 1084: exit(1);
1085: }
1086:
1087: void
1.18 markus 1088: run_err(const char *fmt,...)
1.1 deraadt 1089: {
1090: static FILE *fp;
1091: va_list ap;
1092:
1093: ++errs;
1.136 biorn 1094: if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) {
1095: (void) fprintf(fp, "%c", 0x01);
1096: (void) fprintf(fp, "scp: ");
1097: va_start(ap, fmt);
1098: (void) vfprintf(fp, fmt, ap);
1099: va_end(ap);
1100: (void) fprintf(fp, "\n");
1101: (void) fflush(fp);
1102: }
1.18 markus 1103:
1104: if (!iamremote) {
1.73 markus 1105: va_start(ap, fmt);
1.18 markus 1106: vfprintf(stderr, fmt, ap);
1.73 markus 1107: va_end(ap);
1.18 markus 1108: fprintf(stderr, "\n");
1109: }
1.1 deraadt 1110: }
1111:
1112: void
1.104 djm 1113: verifydir(char *cp)
1.1 deraadt 1114: {
1115: struct stat stb;
1116:
1117: if (!stat(cp, &stb)) {
1118: if (S_ISDIR(stb.st_mode))
1119: return;
1120: errno = ENOTDIR;
1121: }
1122: run_err("%s: %s", cp, strerror(errno));
1.123 avsm 1123: killchild(0);
1.1 deraadt 1124: }
1125:
1126: int
1.104 djm 1127: okname(char *cp0)
1.1 deraadt 1128: {
1129: int c;
1130: char *cp;
1131:
1132: cp = cp0;
1133: do {
1.75 deraadt 1134: c = (int)*cp;
1.1 deraadt 1135: if (c & 0200)
1136: goto bad;
1.101 markus 1137: if (!isalpha(c) && !isdigit(c)) {
1138: switch (c) {
1139: case '\'':
1140: case '"':
1141: case '`':
1142: case ' ':
1143: case '#':
1144: goto bad;
1145: default:
1146: break;
1147: }
1148: }
1.1 deraadt 1149: } while (*++cp);
1150: return (1);
1151:
1.25 markus 1152: bad: fprintf(stderr, "%s: invalid user name\n", cp0);
1.1 deraadt 1153: return (0);
1154: }
1155:
1156: BUF *
1.104 djm 1157: allocbuf(BUF *bp, int fd, int blksize)
1.1 deraadt 1158: {
1159: size_t size;
1160: struct stat stb;
1161:
1162: if (fstat(fd, &stb) < 0) {
1163: run_err("fstat: %s", strerror(errno));
1164: return (0);
1165: }
1.95 markus 1166: size = roundup(stb.st_blksize, blksize);
1167: if (size == 0)
1.18 markus 1168: size = blksize;
1.1 deraadt 1169: if (bp->cnt >= size)
1170: return (bp);
1.18 markus 1171: if (bp->buf == NULL)
1172: bp->buf = xmalloc(size);
1173: else
1.138 ! djm 1174: bp->buf = xrealloc(bp->buf, 1, size);
1.81 markus 1175: memset(bp->buf, 0, size);
1.1 deraadt 1176: bp->cnt = size;
1177: return (bp);
1178: }
1179:
1180: void
1.104 djm 1181: lostconn(int signo)
1.1 deraadt 1182: {
1183: if (!iamremote)
1.74 markus 1184: write(STDERR_FILENO, "lost connection\n", 16);
1185: if (signo)
1186: _exit(1);
1187: else
1188: exit(1);
1.4 aaron 1189: }
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