Annotation of src/usr.bin/ssh/scp.c, Revision 1.144
1.144 ! stevesk 1: /* $OpenBSD: scp.c,v 1.143 2006/07/06 16:03:53 stevesk Exp $ */
1.1 deraadt 2: /*
1.38 deraadt 3: * scp - secure remote copy. This is basically patched BSD rcp which
4: * uses ssh to do the data transfer (instead of using rcmd).
1.27 markus 5: *
1.38 deraadt 6: * NOTE: This version should NOT be suid root. (This uses ssh to
7: * do the transfer and ssh has the necessary privileges.)
1.27 markus 8: *
1.38 deraadt 9: * 1995 Timo Rinne <tri@iki.fi>, Tatu Ylonen <ylo@cs.hut.fi>
10: *
11: * As far as I am concerned, the code I have written for this software
12: * can be used freely for any purpose. Any derived versions of this
13: * software must be clearly marked as such, and if the derived work is
14: * incompatible with the protocol description in the RFC file, it must be
15: * called by a name other than "ssh" or "Secure Shell".
1.39 markus 16: */
1.38 deraadt 17: /*
1.60 deraadt 18: * Copyright (c) 1999 Theo de Raadt. All rights reserved.
19: * Copyright (c) 1999 Aaron Campbell. All rights reserved.
1.27 markus 20: *
1.38 deraadt 21: * Redistribution and use in source and binary forms, with or without
22: * modification, are permitted provided that the following conditions
23: * are met:
24: * 1. Redistributions of source code must retain the above copyright
25: * notice, this list of conditions and the following disclaimer.
26: * 2. Redistributions in binary form must reproduce the above copyright
27: * notice, this list of conditions and the following disclaimer in the
28: * documentation and/or other materials provided with the distribution.
1.27 markus 29: *
1.38 deraadt 30: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
31: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
32: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
33: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
34: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
35: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
36: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
37: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
38: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
39: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
40: */
1.1 deraadt 41:
42: /*
1.35 deraadt 43: * Parts from:
44: *
1.1 deraadt 45: * Copyright (c) 1983, 1990, 1992, 1993, 1995
46: * The Regents of the University of California. All rights reserved.
47: *
48: * Redistribution and use in source and binary forms, with or without
49: * modification, are permitted provided that the following conditions
50: * are met:
51: * 1. Redistributions of source code must retain the above copyright
52: * notice, this list of conditions and the following disclaimer.
53: * 2. Redistributions in binary form must reproduce the above copyright
54: * notice, this list of conditions and the following disclaimer in the
55: * documentation and/or other materials provided with the distribution.
1.103 millert 56: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 57: * may be used to endorse or promote products derived from this software
58: * without specific prior written permission.
59: *
60: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
61: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
62: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
63: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
64: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
65: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
66: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
67: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
68: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
69: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
70: * SUCH DAMAGE.
71: *
72: */
73:
74: #include "includes.h"
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>
1.144 ! stevesk 82: #include <fcntl.h>
1.143 stevesk 83: #include <pwd.h>
1.133 stevesk 84: #include <signal.h>
1.1 deraadt 85:
86: #include "xmalloc.h"
1.51 markus 87: #include "atomicio.h"
1.50 markus 88: #include "pathnames.h"
1.51 markus 89: #include "log.h"
1.69 mouring 90: #include "misc.h"
1.97 fgsch 91: #include "progressmeter.h"
1.1 deraadt 92:
1.140 deraadt 93: int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout);
1.11 aaron 94:
1.99 markus 95: void bwlimit(int);
96:
1.70 mouring 97: /* Struct for addargs */
98: arglist args;
1.41 markus 99:
1.99 markus 100: /* Bandwidth limit */
1.113 djm 101: off_t limit_rate = 0;
1.99 markus 102:
1.11 aaron 103: /* Name of current file being transferred. */
104: char *curfile;
1.4 aaron 105:
1.1 deraadt 106: /* This is set to non-zero to enable verbose mode. */
1.17 markus 107: int verbose_mode = 0;
1.1 deraadt 108:
1.6 aaron 109: /* This is set to zero if the progressmeter is not desired. */
110: int showprogress = 1;
111:
1.34 deraadt 112: /* This is the program to execute for the secured connection. ("ssh" or -S) */
1.50 markus 113: char *ssh_program = _PATH_SSH_PROGRAM;
1.34 deraadt 114:
1.92 markus 115: /* This is used to store the pid of ssh_program */
1.105 djm 116: pid_t do_cmd_pid = -1;
117:
118: static void
119: killchild(int signo)
120: {
1.119 dtucker 121: if (do_cmd_pid > 1) {
1.123 avsm 122: kill(do_cmd_pid, signo ? signo : SIGTERM);
1.119 dtucker 123: waitpid(do_cmd_pid, NULL, 0);
124: }
1.105 djm 125:
1.123 avsm 126: if (signo)
127: _exit(1);
128: exit(1);
1.105 djm 129: }
1.92 markus 130:
1.129 djm 131: static int
132: do_local_cmd(arglist *a)
133: {
134: u_int i;
135: int status;
136: pid_t pid;
137:
138: if (a->num == 0)
139: fatal("do_local_cmd: no arguments");
140:
141: if (verbose_mode) {
142: fprintf(stderr, "Executing:");
143: for (i = 0; i < a->num; i++)
144: fprintf(stderr, " %s", a->list[i]);
145: fprintf(stderr, "\n");
146: }
147: if ((pid = fork()) == -1)
148: fatal("do_local_cmd: fork: %s", strerror(errno));
149:
150: if (pid == 0) {
151: execvp(a->list[0], a->list);
152: perror(a->list[0]);
153: exit(1);
154: }
155:
156: do_cmd_pid = pid;
157: signal(SIGTERM, killchild);
158: signal(SIGINT, killchild);
159: signal(SIGHUP, killchild);
160:
161: while (waitpid(pid, &status, 0) == -1)
162: if (errno != EINTR)
163: fatal("do_local_cmd: waitpid: %s", strerror(errno));
164:
165: do_cmd_pid = -1;
166:
167: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
168: return (-1);
169:
170: return (0);
171: }
172:
1.20 markus 173: /*
174: * This function executes the given command as the specified user on the
175: * given host. This returns < 0 if execution fails, and >= 0 otherwise. This
176: * assigns the input and output file descriptors on success.
177: */
1.1 deraadt 178:
1.27 markus 179: int
1.140 deraadt 180: do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout)
1.1 deraadt 181: {
1.18 markus 182: int pin[2], pout[2], reserved[2];
183:
184: if (verbose_mode)
1.78 deraadt 185: fprintf(stderr,
186: "Executing: program %s host %s, user %s, command %s\n",
187: ssh_program, host,
188: remuser ? remuser : "(unspecified)", cmd);
1.18 markus 189:
1.20 markus 190: /*
191: * Reserve two descriptors so that the real pipes won't get
192: * descriptors 0 and 1 because that will screw up dup2 below.
193: */
1.142 markus 194: if (pipe(reserved) < 0)
195: fatal("pipe: %s", strerror(errno));
1.18 markus 196:
197: /* Create a socket pair for communicating with ssh. */
198: if (pipe(pin) < 0)
199: fatal("pipe: %s", strerror(errno));
200: if (pipe(pout) < 0)
201: fatal("pipe: %s", strerror(errno));
202:
203: /* Free the reserved descriptors. */
204: close(reserved[0]);
205: close(reserved[1]);
206:
1.106 nino 207: /* Fork a child to execute the command on the remote host using ssh. */
1.92 markus 208: do_cmd_pid = fork();
209: if (do_cmd_pid == 0) {
1.18 markus 210: /* Child. */
211: close(pin[1]);
212: close(pout[0]);
213: dup2(pin[0], 0);
214: dup2(pout[1], 1);
215: close(pin[0]);
216: close(pout[1]);
217:
1.129 djm 218: replacearg(&args, 0, "%s", ssh_program);
1.41 markus 219: if (remuser != NULL)
1.70 mouring 220: addargs(&args, "-l%s", remuser);
221: addargs(&args, "%s", host);
222: addargs(&args, "%s", cmd);
1.18 markus 223:
1.41 markus 224: execvp(ssh_program, args.list);
1.34 deraadt 225: perror(ssh_program);
1.18 markus 226: exit(1);
1.92 markus 227: } else if (do_cmd_pid == -1) {
228: fatal("fork: %s", strerror(errno));
1.18 markus 229: }
230: /* Parent. Close the other side, and return the local side. */
231: close(pin[0]);
232: *fdout = pin[1];
233: close(pout[1]);
234: *fdin = pout[0];
1.105 djm 235: signal(SIGTERM, killchild);
236: signal(SIGINT, killchild);
237: signal(SIGHUP, killchild);
1.18 markus 238: return 0;
1.1 deraadt 239: }
240:
241: typedef struct {
1.124 djm 242: size_t cnt;
1.1 deraadt 243: char *buf;
244: } BUF;
245:
1.18 markus 246: BUF *allocbuf(BUF *, int, int);
247: void lostconn(int);
248: int okname(char *);
249: void run_err(const char *,...);
250: void verifydir(char *);
1.1 deraadt 251:
252: struct passwd *pwd;
1.18 markus 253: uid_t userid;
1.1 deraadt 254: int errs, remin, remout;
255: int pflag, iamremote, iamrecursive, targetshouldbedirectory;
256:
257: #define CMDNEEDS 64
258: char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
259:
1.18 markus 260: int response(void);
261: void rsource(char *, struct stat *);
262: void sink(int, char *[]);
263: void source(int, char *[]);
264: void tolocal(int, char *[]);
265: void toremote(char *, int, char *[]);
266: void usage(void);
1.1 deraadt 267:
268: int
1.104 djm 269: main(int argc, char **argv)
1.1 deraadt 270: {
1.92 markus 271: int ch, fflag, tflag, status;
1.99 markus 272: double speed;
273: char *targ, *endp;
1.1 deraadt 274: extern char *optarg;
275: extern int optind;
1.126 djm 276:
277: /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
278: sanitise_stdfd();
1.1 deraadt 279:
1.129 djm 280: memset(&args, '\0', sizeof(args));
1.41 markus 281: args.list = NULL;
1.129 djm 282: addargs(&args, "%s", ssh_program);
1.70 mouring 283: addargs(&args, "-x");
1.82 stevesk 284: addargs(&args, "-oForwardAgent no");
1.128 reyk 285: addargs(&args, "-oPermitLocalCommand no");
1.84 stevesk 286: addargs(&args, "-oClearAllForwardings yes");
1.41 markus 287:
1.1 deraadt 288: fflag = tflag = 0;
1.100 markus 289: while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q1246S:o:F:")) != -1)
1.18 markus 290: switch (ch) {
291: /* User-visible flags. */
1.100 markus 292: case '1':
293: case '2':
1.23 markus 294: case '4':
1.41 markus 295: case '6':
296: case 'C':
1.70 mouring 297: addargs(&args, "-%c", ch);
1.41 markus 298: break;
299: case 'o':
300: case 'c':
301: case 'i':
1.83 stevesk 302: case 'F':
1.70 mouring 303: addargs(&args, "-%c%s", ch, optarg);
1.23 markus 304: break;
1.41 markus 305: case 'P':
1.70 mouring 306: addargs(&args, "-p%s", optarg);
1.41 markus 307: break;
308: case 'B':
1.70 mouring 309: addargs(&args, "-oBatchmode yes");
1.23 markus 310: break;
1.99 markus 311: case 'l':
312: speed = strtod(optarg, &endp);
313: if (speed <= 0 || *endp != '\0')
314: usage();
1.113 djm 315: limit_rate = speed * 1024;
1.99 markus 316: break;
1.1 deraadt 317: case 'p':
318: pflag = 1;
319: break;
320: case 'r':
321: iamrecursive = 1;
322: break;
1.34 deraadt 323: case 'S':
1.41 markus 324: ssh_program = xstrdup(optarg);
325: break;
326: case 'v':
1.72 markus 327: addargs(&args, "-v");
1.41 markus 328: verbose_mode = 1;
329: break;
330: case 'q':
1.111 dtucker 331: addargs(&args, "-q");
1.41 markus 332: showprogress = 0;
1.34 deraadt 333: break;
334:
1.18 markus 335: /* Server options. */
1.1 deraadt 336: case 'd':
337: targetshouldbedirectory = 1;
338: break;
1.18 markus 339: case 'f': /* "from" */
1.1 deraadt 340: iamremote = 1;
341: fflag = 1;
342: break;
1.18 markus 343: case 't': /* "to" */
1.1 deraadt 344: iamremote = 1;
345: tflag = 1;
346: break;
347: default:
348: usage();
349: }
350: argc -= optind;
351: argv += optind;
352:
353: if ((pwd = getpwuid(userid = getuid())) == NULL)
1.108 deraadt 354: fatal("unknown user %u", (u_int) userid);
1.1 deraadt 355:
1.18 markus 356: if (!isatty(STDERR_FILENO))
1.7 deraadt 357: showprogress = 0;
358:
1.1 deraadt 359: remin = STDIN_FILENO;
360: remout = STDOUT_FILENO;
361:
1.52 stevesk 362: if (fflag) {
1.18 markus 363: /* Follow "protocol", send data. */
364: (void) response();
1.1 deraadt 365: source(argc, argv);
366: exit(errs != 0);
367: }
1.18 markus 368: if (tflag) {
369: /* Receive data. */
1.1 deraadt 370: sink(argc, argv);
371: exit(errs != 0);
372: }
373: if (argc < 2)
374: usage();
375: if (argc > 2)
376: targetshouldbedirectory = 1;
377:
378: remin = remout = -1;
1.92 markus 379: do_cmd_pid = -1;
1.1 deraadt 380: /* Command to be executed on remote system using "ssh". */
1.55 deraadt 381: (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
382: verbose_mode ? " -v" : "",
1.35 deraadt 383: iamrecursive ? " -r" : "", pflag ? " -p" : "",
384: targetshouldbedirectory ? " -d" : "");
1.1 deraadt 385:
1.18 markus 386: (void) signal(SIGPIPE, lostconn);
1.1 deraadt 387:
388: if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */
389: toremote(targ, argc, argv);
390: else {
391: if (targetshouldbedirectory)
392: verifydir(argv[argc - 1]);
1.130 djm 393: tolocal(argc, argv); /* Dest is local host. */
1.92 markus 394: }
395: /*
396: * Finally check the exit status of the ssh process, if one was forked
397: * and no error has occured yet
398: */
399: if (do_cmd_pid != -1 && errs == 0) {
400: if (remin != -1)
401: (void) close(remin);
402: if (remout != -1)
403: (void) close(remout);
404: if (waitpid(do_cmd_pid, &status, 0) == -1)
405: errs = 1;
406: else {
407: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
408: errs = 1;
409: }
1.1 deraadt 410: }
411: exit(errs != 0);
412: }
413:
414: void
1.104 djm 415: toremote(char *targ, int argc, char **argv)
1.1 deraadt 416: {
1.120 deraadt 417: char *bp, *host, *src, *suser, *thost, *tuser, *arg;
1.129 djm 418: arglist alist;
1.140 deraadt 419: int i;
1.129 djm 420:
421: memset(&alist, '\0', sizeof(alist));
422: alist.list = NULL;
1.1 deraadt 423:
424: *targ++ = 0;
425: if (*targ == 0)
426: targ = ".";
427:
1.121 djm 428: arg = xstrdup(argv[argc - 1]);
1.120 deraadt 429: if ((thost = strrchr(arg, '@'))) {
1.1 deraadt 430: /* user@host */
431: *thost++ = 0;
1.120 deraadt 432: tuser = arg;
1.1 deraadt 433: if (*tuser == '\0')
434: tuser = NULL;
435: } else {
1.120 deraadt 436: thost = arg;
1.1 deraadt 437: tuser = NULL;
438: }
439:
1.129 djm 440: if (tuser != NULL && !okname(tuser)) {
441: xfree(arg);
442: return;
443: }
444:
1.1 deraadt 445: for (i = 0; i < argc - 1; i++) {
446: src = colon(argv[i]);
1.18 markus 447: if (src) { /* remote to remote */
1.129 djm 448: freeargs(&alist);
449: addargs(&alist, "%s", ssh_program);
450: if (verbose_mode)
451: addargs(&alist, "-v");
452: addargs(&alist, "-x");
453: addargs(&alist, "-oClearAllForwardings yes");
454: addargs(&alist, "-n");
455:
1.1 deraadt 456: *src++ = 0;
457: if (*src == 0)
458: src = ".";
1.94 markus 459: host = strrchr(argv[i], '@');
1.129 djm 460:
1.1 deraadt 461: if (host) {
462: *host++ = 0;
1.23 markus 463: host = cleanhostname(host);
1.1 deraadt 464: suser = argv[i];
465: if (*suser == '\0')
466: suser = pwd->pw_name;
1.129 djm 467: else if (!okname(suser))
1.101 markus 468: continue;
1.129 djm 469: addargs(&alist, "-l");
470: addargs(&alist, "%s", suser);
1.23 markus 471: } else {
472: host = cleanhostname(argv[i]);
473: }
1.129 djm 474: addargs(&alist, "%s", host);
475: addargs(&alist, "%s", cmd);
476: addargs(&alist, "%s", src);
477: addargs(&alist, "%s%s%s:%s",
478: tuser ? tuser : "", tuser ? "@" : "",
479: thost, targ);
480: if (do_local_cmd(&alist) != 0)
1.109 markus 481: errs = 1;
1.18 markus 482: } else { /* local to remote */
1.1 deraadt 483: if (remin == -1) {
1.141 djm 484: xasprintf(&bp, "%s -t %s", cmd, targ);
1.23 markus 485: host = cleanhostname(thost);
1.35 deraadt 486: if (do_cmd(host, tuser, bp, &remin,
1.140 deraadt 487: &remout) < 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: }
1.142 markus 496: xfree(arg);
1.1 deraadt 497: }
498:
499: void
1.104 djm 500: tolocal(int argc, char **argv)
1.1 deraadt 501: {
502: char *bp, *host, *src, *suser;
1.129 djm 503: arglist alist;
1.140 deraadt 504: int i;
1.129 djm 505:
506: memset(&alist, '\0', sizeof(alist));
507: alist.list = NULL;
1.1 deraadt 508:
509: for (i = 0; i < argc - 1; i++) {
1.18 markus 510: if (!(src = colon(argv[i]))) { /* Local to local. */
1.129 djm 511: freeargs(&alist);
512: addargs(&alist, "%s", _PATH_CP);
513: if (iamrecursive)
514: addargs(&alist, "-r");
515: if (pflag)
516: addargs(&alist, "-p");
517: addargs(&alist, "%s", argv[i]);
518: addargs(&alist, "%s", argv[argc-1]);
519: if (do_local_cmd(&alist))
1.1 deraadt 520: ++errs;
521: continue;
522: }
523: *src++ = 0;
524: if (*src == 0)
525: src = ".";
1.94 markus 526: if ((host = strrchr(argv[i], '@')) == NULL) {
1.1 deraadt 527: host = argv[i];
528: suser = NULL;
529: } else {
530: *host++ = 0;
531: suser = argv[i];
532: if (*suser == '\0')
533: suser = pwd->pw_name;
534: }
1.23 markus 535: host = cleanhostname(host);
1.141 djm 536: xasprintf(&bp, "%s -f %s", cmd, src);
1.140 deraadt 537: if (do_cmd(host, suser, bp, &remin, &remout) < 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;
1.140 deraadt 782: int amt, exists, first, ofd;
783: mode_t mode, omode, mask;
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
1.138 djm 1175: bp->buf = xrealloc(bp->buf, 1, 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: }