Annotation of src/usr.bin/ssh/scp.c, Revision 1.133
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"
1.133 ! stevesk 74: RCSID("$OpenBSD: scp.c,v 1.132 2006/02/10 01:44:26 stevesk Exp $");
1.132 stevesk 75:
76: #include <sys/types.h>
77: #include <sys/wait.h>
1.131 stevesk 78:
79: #include <dirent.h>
1.133 ! stevesk 80: #include <signal.h>
1.1 deraadt 81:
82: #include "xmalloc.h"
1.51 markus 83: #include "atomicio.h"
1.50 markus 84: #include "pathnames.h"
1.51 markus 85: #include "log.h"
1.69 mouring 86: #include "misc.h"
1.97 fgsch 87: #include "progressmeter.h"
1.1 deraadt 88:
1.35 deraadt 89: int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout, int argc);
1.11 aaron 90:
1.99 markus 91: void bwlimit(int);
92:
1.70 mouring 93: /* Struct for addargs */
94: arglist args;
1.41 markus 95:
1.99 markus 96: /* Bandwidth limit */
1.113 djm 97: off_t limit_rate = 0;
1.99 markus 98:
1.11 aaron 99: /* Name of current file being transferred. */
100: char *curfile;
1.4 aaron 101:
1.1 deraadt 102: /* This is set to non-zero to enable verbose mode. */
1.17 markus 103: int verbose_mode = 0;
1.1 deraadt 104:
1.6 aaron 105: /* This is set to zero if the progressmeter is not desired. */
106: int showprogress = 1;
107:
1.34 deraadt 108: /* This is the program to execute for the secured connection. ("ssh" or -S) */
1.50 markus 109: char *ssh_program = _PATH_SSH_PROGRAM;
1.34 deraadt 110:
1.92 markus 111: /* This is used to store the pid of ssh_program */
1.105 djm 112: pid_t do_cmd_pid = -1;
113:
114: static void
115: killchild(int signo)
116: {
1.119 dtucker 117: if (do_cmd_pid > 1) {
1.123 avsm 118: kill(do_cmd_pid, signo ? signo : SIGTERM);
1.119 dtucker 119: waitpid(do_cmd_pid, NULL, 0);
120: }
1.105 djm 121:
1.123 avsm 122: if (signo)
123: _exit(1);
124: exit(1);
1.105 djm 125: }
1.92 markus 126:
1.129 djm 127: static int
128: do_local_cmd(arglist *a)
129: {
130: u_int i;
131: int status;
132: pid_t pid;
133:
134: if (a->num == 0)
135: fatal("do_local_cmd: no arguments");
136:
137: if (verbose_mode) {
138: fprintf(stderr, "Executing:");
139: for (i = 0; i < a->num; i++)
140: fprintf(stderr, " %s", a->list[i]);
141: fprintf(stderr, "\n");
142: }
143: if ((pid = fork()) == -1)
144: fatal("do_local_cmd: fork: %s", strerror(errno));
145:
146: if (pid == 0) {
147: execvp(a->list[0], a->list);
148: perror(a->list[0]);
149: exit(1);
150: }
151:
152: do_cmd_pid = pid;
153: signal(SIGTERM, killchild);
154: signal(SIGINT, killchild);
155: signal(SIGHUP, killchild);
156:
157: while (waitpid(pid, &status, 0) == -1)
158: if (errno != EINTR)
159: fatal("do_local_cmd: waitpid: %s", strerror(errno));
160:
161: do_cmd_pid = -1;
162:
163: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
164: return (-1);
165:
166: return (0);
167: }
168:
1.20 markus 169: /*
170: * This function executes the given command as the specified user on the
171: * given host. This returns < 0 if execution fails, and >= 0 otherwise. This
172: * assigns the input and output file descriptors on success.
173: */
1.1 deraadt 174:
1.27 markus 175: int
1.35 deraadt 176: do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout, int argc)
1.1 deraadt 177: {
1.18 markus 178: int pin[2], pout[2], reserved[2];
179:
180: if (verbose_mode)
1.78 deraadt 181: fprintf(stderr,
182: "Executing: program %s host %s, user %s, command %s\n",
183: ssh_program, host,
184: remuser ? remuser : "(unspecified)", cmd);
1.18 markus 185:
1.20 markus 186: /*
187: * Reserve two descriptors so that the real pipes won't get
188: * descriptors 0 and 1 because that will screw up dup2 below.
189: */
1.18 markus 190: pipe(reserved);
191:
192: /* Create a socket pair for communicating with ssh. */
193: if (pipe(pin) < 0)
194: fatal("pipe: %s", strerror(errno));
195: if (pipe(pout) < 0)
196: fatal("pipe: %s", strerror(errno));
197:
198: /* Free the reserved descriptors. */
199: close(reserved[0]);
200: close(reserved[1]);
201:
1.106 nino 202: /* Fork a child to execute the command on the remote host using ssh. */
1.92 markus 203: do_cmd_pid = fork();
204: if (do_cmd_pid == 0) {
1.18 markus 205: /* Child. */
206: close(pin[1]);
207: close(pout[0]);
208: dup2(pin[0], 0);
209: dup2(pout[1], 1);
210: close(pin[0]);
211: close(pout[1]);
212:
1.129 djm 213: replacearg(&args, 0, "%s", ssh_program);
1.41 markus 214: if (remuser != NULL)
1.70 mouring 215: addargs(&args, "-l%s", remuser);
216: addargs(&args, "%s", host);
217: addargs(&args, "%s", cmd);
1.18 markus 218:
1.41 markus 219: execvp(ssh_program, args.list);
1.34 deraadt 220: perror(ssh_program);
1.18 markus 221: exit(1);
1.92 markus 222: } else if (do_cmd_pid == -1) {
223: fatal("fork: %s", strerror(errno));
1.18 markus 224: }
225: /* Parent. Close the other side, and return the local side. */
226: close(pin[0]);
227: *fdout = pin[1];
228: close(pout[1]);
229: *fdin = pout[0];
1.105 djm 230: signal(SIGTERM, killchild);
231: signal(SIGINT, killchild);
232: signal(SIGHUP, killchild);
1.18 markus 233: return 0;
1.1 deraadt 234: }
235:
236: typedef struct {
1.124 djm 237: size_t cnt;
1.1 deraadt 238: char *buf;
239: } BUF;
240:
1.18 markus 241: BUF *allocbuf(BUF *, int, int);
242: void lostconn(int);
243: void nospace(void);
244: int okname(char *);
245: void run_err(const char *,...);
246: void verifydir(char *);
1.1 deraadt 247:
248: struct passwd *pwd;
1.18 markus 249: uid_t userid;
1.1 deraadt 250: int errs, remin, remout;
251: int pflag, iamremote, iamrecursive, targetshouldbedirectory;
252:
253: #define CMDNEEDS 64
254: char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
255:
1.18 markus 256: int response(void);
257: void rsource(char *, struct stat *);
258: void sink(int, char *[]);
259: void source(int, char *[]);
260: void tolocal(int, char *[]);
261: void toremote(char *, int, char *[]);
262: void usage(void);
1.1 deraadt 263:
264: int
1.104 djm 265: main(int argc, char **argv)
1.1 deraadt 266: {
1.92 markus 267: int ch, fflag, tflag, status;
1.99 markus 268: double speed;
269: char *targ, *endp;
1.1 deraadt 270: extern char *optarg;
271: extern int optind;
1.126 djm 272:
273: /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
274: sanitise_stdfd();
1.1 deraadt 275:
1.129 djm 276: memset(&args, '\0', sizeof(args));
1.41 markus 277: args.list = NULL;
1.129 djm 278: addargs(&args, "%s", ssh_program);
1.70 mouring 279: addargs(&args, "-x");
1.82 stevesk 280: addargs(&args, "-oForwardAgent no");
1.128 reyk 281: addargs(&args, "-oPermitLocalCommand no");
1.84 stevesk 282: addargs(&args, "-oClearAllForwardings yes");
1.41 markus 283:
1.1 deraadt 284: fflag = tflag = 0;
1.100 markus 285: while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q1246S:o:F:")) != -1)
1.18 markus 286: switch (ch) {
287: /* User-visible flags. */
1.100 markus 288: case '1':
289: case '2':
1.23 markus 290: case '4':
1.41 markus 291: case '6':
292: case 'C':
1.70 mouring 293: addargs(&args, "-%c", ch);
1.41 markus 294: break;
295: case 'o':
296: case 'c':
297: case 'i':
1.83 stevesk 298: case 'F':
1.70 mouring 299: addargs(&args, "-%c%s", ch, optarg);
1.23 markus 300: break;
1.41 markus 301: case 'P':
1.70 mouring 302: addargs(&args, "-p%s", optarg);
1.41 markus 303: break;
304: case 'B':
1.70 mouring 305: addargs(&args, "-oBatchmode yes");
1.23 markus 306: break;
1.99 markus 307: case 'l':
308: speed = strtod(optarg, &endp);
309: if (speed <= 0 || *endp != '\0')
310: usage();
1.113 djm 311: limit_rate = speed * 1024;
1.99 markus 312: break;
1.1 deraadt 313: case 'p':
314: pflag = 1;
315: break;
316: case 'r':
317: iamrecursive = 1;
318: break;
1.34 deraadt 319: case 'S':
1.41 markus 320: ssh_program = xstrdup(optarg);
321: break;
322: case 'v':
1.72 markus 323: addargs(&args, "-v");
1.41 markus 324: verbose_mode = 1;
325: break;
326: case 'q':
1.111 dtucker 327: addargs(&args, "-q");
1.41 markus 328: showprogress = 0;
1.34 deraadt 329: break;
330:
1.18 markus 331: /* Server options. */
1.1 deraadt 332: case 'd':
333: targetshouldbedirectory = 1;
334: break;
1.18 markus 335: case 'f': /* "from" */
1.1 deraadt 336: iamremote = 1;
337: fflag = 1;
338: break;
1.18 markus 339: case 't': /* "to" */
1.1 deraadt 340: iamremote = 1;
341: tflag = 1;
342: break;
343: default:
344: usage();
345: }
346: argc -= optind;
347: argv += optind;
348:
349: if ((pwd = getpwuid(userid = getuid())) == NULL)
1.108 deraadt 350: fatal("unknown user %u", (u_int) userid);
1.1 deraadt 351:
1.18 markus 352: if (!isatty(STDERR_FILENO))
1.7 deraadt 353: showprogress = 0;
354:
1.1 deraadt 355: remin = STDIN_FILENO;
356: remout = STDOUT_FILENO;
357:
1.52 stevesk 358: if (fflag) {
1.18 markus 359: /* Follow "protocol", send data. */
360: (void) response();
1.1 deraadt 361: source(argc, argv);
362: exit(errs != 0);
363: }
1.18 markus 364: if (tflag) {
365: /* Receive data. */
1.1 deraadt 366: sink(argc, argv);
367: exit(errs != 0);
368: }
369: if (argc < 2)
370: usage();
371: if (argc > 2)
372: targetshouldbedirectory = 1;
373:
374: remin = remout = -1;
1.92 markus 375: do_cmd_pid = -1;
1.1 deraadt 376: /* Command to be executed on remote system using "ssh". */
1.55 deraadt 377: (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
378: verbose_mode ? " -v" : "",
1.35 deraadt 379: iamrecursive ? " -r" : "", pflag ? " -p" : "",
380: targetshouldbedirectory ? " -d" : "");
1.1 deraadt 381:
1.18 markus 382: (void) signal(SIGPIPE, lostconn);
1.1 deraadt 383:
384: if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */
385: toremote(targ, argc, argv);
386: else {
387: if (targetshouldbedirectory)
388: verifydir(argv[argc - 1]);
1.130 djm 389: tolocal(argc, argv); /* Dest is local host. */
1.92 markus 390: }
391: /*
392: * Finally check the exit status of the ssh process, if one was forked
393: * and no error has occured yet
394: */
395: if (do_cmd_pid != -1 && errs == 0) {
396: if (remin != -1)
397: (void) close(remin);
398: if (remout != -1)
399: (void) close(remout);
400: if (waitpid(do_cmd_pid, &status, 0) == -1)
401: errs = 1;
402: else {
403: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
404: errs = 1;
405: }
1.1 deraadt 406: }
407: exit(errs != 0);
408: }
409:
410: void
1.104 djm 411: toremote(char *targ, int argc, char **argv)
1.1 deraadt 412: {
413: int i, len;
1.120 deraadt 414: char *bp, *host, *src, *suser, *thost, *tuser, *arg;
1.129 djm 415: arglist alist;
416:
417: memset(&alist, '\0', sizeof(alist));
418: alist.list = NULL;
1.1 deraadt 419:
420: *targ++ = 0;
421: if (*targ == 0)
422: targ = ".";
423:
1.121 djm 424: arg = xstrdup(argv[argc - 1]);
1.120 deraadt 425: if ((thost = strrchr(arg, '@'))) {
1.1 deraadt 426: /* user@host */
427: *thost++ = 0;
1.120 deraadt 428: tuser = arg;
1.1 deraadt 429: if (*tuser == '\0')
430: tuser = NULL;
431: } else {
1.120 deraadt 432: thost = arg;
1.1 deraadt 433: tuser = NULL;
434: }
435:
1.129 djm 436: if (tuser != NULL && !okname(tuser)) {
437: xfree(arg);
438: return;
439: }
440:
1.1 deraadt 441: for (i = 0; i < argc - 1; i++) {
442: src = colon(argv[i]);
1.18 markus 443: if (src) { /* remote to remote */
1.129 djm 444: freeargs(&alist);
445: addargs(&alist, "%s", ssh_program);
446: if (verbose_mode)
447: addargs(&alist, "-v");
448: addargs(&alist, "-x");
449: addargs(&alist, "-oClearAllForwardings yes");
450: addargs(&alist, "-n");
451:
1.1 deraadt 452: *src++ = 0;
453: if (*src == 0)
454: src = ".";
1.94 markus 455: host = strrchr(argv[i], '@');
1.129 djm 456:
1.1 deraadt 457: if (host) {
458: *host++ = 0;
1.23 markus 459: host = cleanhostname(host);
1.1 deraadt 460: suser = argv[i];
461: if (*suser == '\0')
462: suser = pwd->pw_name;
1.129 djm 463: else if (!okname(suser))
1.101 markus 464: continue;
1.129 djm 465: addargs(&alist, "-l");
466: addargs(&alist, "%s", suser);
1.23 markus 467: } else {
468: host = cleanhostname(argv[i]);
469: }
1.129 djm 470: addargs(&alist, "%s", host);
471: addargs(&alist, "%s", cmd);
472: addargs(&alist, "%s", src);
473: addargs(&alist, "%s%s%s:%s",
474: tuser ? tuser : "", tuser ? "@" : "",
475: thost, targ);
476: if (do_local_cmd(&alist) != 0)
1.109 markus 477: errs = 1;
1.18 markus 478: } else { /* local to remote */
1.1 deraadt 479: if (remin == -1) {
480: len = strlen(targ) + CMDNEEDS + 20;
1.18 markus 481: bp = xmalloc(len);
1.55 deraadt 482: (void) snprintf(bp, len, "%s -t %s", cmd, targ);
1.23 markus 483: host = cleanhostname(thost);
1.35 deraadt 484: if (do_cmd(host, tuser, bp, &remin,
485: &remout, argc) < 0)
1.18 markus 486: exit(1);
1.1 deraadt 487: if (response() < 0)
488: exit(1);
1.18 markus 489: (void) xfree(bp);
1.1 deraadt 490: }
1.18 markus 491: source(1, argv + i);
1.1 deraadt 492: }
493: }
494: }
495:
496: void
1.104 djm 497: tolocal(int argc, char **argv)
1.1 deraadt 498: {
499: int i, len;
500: char *bp, *host, *src, *suser;
1.129 djm 501: arglist alist;
502:
503: memset(&alist, '\0', sizeof(alist));
504: alist.list = NULL;
1.1 deraadt 505:
506: for (i = 0; i < argc - 1; i++) {
1.18 markus 507: if (!(src = colon(argv[i]))) { /* Local to local. */
1.129 djm 508: freeargs(&alist);
509: addargs(&alist, "%s", _PATH_CP);
510: if (iamrecursive)
511: addargs(&alist, "-r");
512: if (pflag)
513: addargs(&alist, "-p");
514: addargs(&alist, "%s", argv[i]);
515: addargs(&alist, "%s", argv[argc-1]);
516: if (do_local_cmd(&alist))
1.1 deraadt 517: ++errs;
518: continue;
519: }
520: *src++ = 0;
521: if (*src == 0)
522: src = ".";
1.94 markus 523: if ((host = strrchr(argv[i], '@')) == NULL) {
1.1 deraadt 524: host = argv[i];
525: suser = NULL;
526: } else {
527: *host++ = 0;
528: suser = argv[i];
529: if (*suser == '\0')
530: suser = pwd->pw_name;
531: }
1.23 markus 532: host = cleanhostname(host);
1.1 deraadt 533: len = strlen(src) + CMDNEEDS + 20;
1.18 markus 534: bp = xmalloc(len);
1.55 deraadt 535: (void) snprintf(bp, len, "%s -f %s", cmd, src);
1.35 deraadt 536: if (do_cmd(host, suser, bp, &remin, &remout, argc) < 0) {
1.18 markus 537: (void) xfree(bp);
538: ++errs;
539: continue;
1.1 deraadt 540: }
1.18 markus 541: xfree(bp);
1.1 deraadt 542: sink(1, argv + argc - 1);
1.18 markus 543: (void) close(remin);
1.1 deraadt 544: remin = remout = -1;
545: }
546: }
547:
548: void
1.104 djm 549: source(int argc, char **argv)
1.1 deraadt 550: {
551: struct stat stb;
552: static BUF buffer;
553: BUF *bp;
1.122 avsm 554: off_t i, amt, statbytes;
555: size_t result;
1.125 dtucker 556: int fd = -1, haderr, indx;
1.1 deraadt 557: char *last, *name, buf[2048];
1.65 deraadt 558: int len;
1.1 deraadt 559:
560: for (indx = 0; indx < argc; ++indx) {
1.18 markus 561: name = argv[indx];
1.11 aaron 562: statbytes = 0;
1.65 deraadt 563: len = strlen(name);
564: while (len > 1 && name[len-1] == '/')
565: name[--len] = '\0';
1.85 markus 566: if (strchr(name, '\n') != NULL) {
567: run_err("%s: skipping, filename contains a newline",
568: name);
569: goto next;
570: }
1.1 deraadt 571: if ((fd = open(name, O_RDONLY, 0)) < 0)
572: goto syserr;
573: if (fstat(fd, &stb) < 0) {
574: syserr: run_err("%s: %s", name, strerror(errno));
575: goto next;
576: }
577: switch (stb.st_mode & S_IFMT) {
578: case S_IFREG:
579: break;
580: case S_IFDIR:
581: if (iamrecursive) {
582: rsource(name, &stb);
583: goto next;
584: }
585: /* FALLTHROUGH */
586: default:
587: run_err("%s: not a regular file", name);
588: goto next;
589: }
590: if ((last = strrchr(name, '/')) == NULL)
591: last = name;
592: else
593: ++last;
1.11 aaron 594: curfile = last;
1.1 deraadt 595: if (pflag) {
596: /*
597: * Make it compatible with possible future
598: * versions expecting microseconds.
599: */
1.55 deraadt 600: (void) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n",
1.47 markus 601: (u_long) stb.st_mtime,
602: (u_long) stb.st_atime);
1.107 deraadt 603: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 604: if (response() < 0)
605: goto next;
606: }
607: #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
1.61 markus 608: snprintf(buf, sizeof buf, "C%04o %lld %s\n",
1.47 markus 609: (u_int) (stb.st_mode & FILEMODEMASK),
1.62 markus 610: (long long)stb.st_size, last);
1.18 markus 611: if (verbose_mode) {
612: fprintf(stderr, "Sending file modes: %s", buf);
613: }
1.107 deraadt 614: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 615: if (response() < 0)
616: goto next;
617: if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) {
1.127 deraadt 618: next: if (fd != -1) {
619: (void) close(fd);
620: fd = -1;
621: }
1.1 deraadt 622: continue;
623: }
1.97 fgsch 624: if (showprogress)
625: start_progress_meter(curfile, stb.st_size, &statbytes);
1.1 deraadt 626: /* Keep writing after an error so that we stay sync'd up. */
627: for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
628: amt = bp->cnt;
629: if (i + amt > stb.st_size)
630: amt = stb.st_size - i;
631: if (!haderr) {
1.30 deraadt 632: result = atomicio(read, fd, bp->buf, amt);
1.1 deraadt 633: if (result != amt)
1.122 avsm 634: haderr = errno;
1.1 deraadt 635: }
636: if (haderr)
1.107 deraadt 637: (void) atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 638: else {
1.107 deraadt 639: result = atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 640: if (result != amt)
1.122 avsm 641: haderr = errno;
1.4 aaron 642: statbytes += result;
1.1 deraadt 643: }
1.113 djm 644: if (limit_rate)
1.99 markus 645: bwlimit(amt);
1.1 deraadt 646: }
1.18 markus 647: if (showprogress)
1.97 fgsch 648: stop_progress_meter();
1.4 aaron 649:
1.127 deraadt 650: if (fd != -1) {
651: if (close(fd) < 0 && !haderr)
652: haderr = errno;
653: fd = -1;
654: }
1.1 deraadt 655: if (!haderr)
1.107 deraadt 656: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 657: else
658: run_err("%s: %s", name, strerror(haderr));
1.18 markus 659: (void) response();
1.1 deraadt 660: }
661: }
662:
663: void
1.104 djm 664: rsource(char *name, struct stat *statp)
1.1 deraadt 665: {
666: DIR *dirp;
667: struct dirent *dp;
668: char *last, *vect[1], path[1100];
669:
670: if (!(dirp = opendir(name))) {
671: run_err("%s: %s", name, strerror(errno));
672: return;
673: }
674: last = strrchr(name, '/');
675: if (last == 0)
676: last = name;
677: else
678: last++;
679: if (pflag) {
1.55 deraadt 680: (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n",
1.47 markus 681: (u_long) statp->st_mtime,
682: (u_long) statp->st_atime);
1.107 deraadt 683: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 684: if (response() < 0) {
685: closedir(dirp);
686: return;
687: }
688: }
1.55 deraadt 689: (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n",
1.47 markus 690: (u_int) (statp->st_mode & FILEMODEMASK), 0, last);
1.18 markus 691: if (verbose_mode)
692: fprintf(stderr, "Entering directory: %s", path);
1.107 deraadt 693: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 694: if (response() < 0) {
695: closedir(dirp);
696: return;
697: }
1.63 stevesk 698: while ((dp = readdir(dirp)) != NULL) {
1.1 deraadt 699: if (dp->d_ino == 0)
700: continue;
701: if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
702: continue;
703: if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) {
704: run_err("%s/%s: name too long", name, dp->d_name);
705: continue;
706: }
1.55 deraadt 707: (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name);
1.1 deraadt 708: vect[0] = path;
709: source(1, vect);
710: }
1.18 markus 711: (void) closedir(dirp);
1.107 deraadt 712: (void) atomicio(vwrite, remout, "E\n", 2);
1.18 markus 713: (void) response();
1.1 deraadt 714: }
715:
716: void
1.99 markus 717: bwlimit(int amount)
718: {
719: static struct timeval bwstart, bwend;
720: static int lamt, thresh = 16384;
1.115 avsm 721: u_int64_t waitlen;
1.99 markus 722: struct timespec ts, rm;
723:
724: if (!timerisset(&bwstart)) {
725: gettimeofday(&bwstart, NULL);
726: return;
727: }
728:
729: lamt += amount;
730: if (lamt < thresh)
731: return;
732:
733: gettimeofday(&bwend, NULL);
734: timersub(&bwend, &bwstart, &bwend);
735: if (!timerisset(&bwend))
736: return;
737:
738: lamt *= 8;
1.115 avsm 739: waitlen = (double)1000000L * lamt / limit_rate;
1.99 markus 740:
1.115 avsm 741: bwstart.tv_sec = waitlen / 1000000L;
742: bwstart.tv_usec = waitlen % 1000000L;
1.99 markus 743:
744: if (timercmp(&bwstart, &bwend, >)) {
745: timersub(&bwstart, &bwend, &bwend);
746:
747: /* Adjust the wait time */
748: if (bwend.tv_sec) {
749: thresh /= 2;
750: if (thresh < 2048)
751: thresh = 2048;
752: } else if (bwend.tv_usec < 100) {
753: thresh *= 2;
754: if (thresh > 32768)
755: thresh = 32768;
756: }
757:
758: TIMEVAL_TO_TIMESPEC(&bwend, &ts);
759: while (nanosleep(&ts, &rm) == -1) {
760: if (errno != EINTR)
761: break;
762: ts = rm;
763: }
764: }
765:
766: lamt = 0;
767: gettimeofday(&bwstart, NULL);
768: }
769:
770: void
1.104 djm 771: sink(int argc, char **argv)
1.1 deraadt 772: {
773: static BUF buffer;
774: struct stat stb;
1.18 markus 775: enum {
776: YES, NO, DISPLAYED
777: } wrerr;
1.1 deraadt 778: BUF *bp;
1.122 avsm 779: off_t i;
1.124 djm 780: size_t j, count;
781: int amt, exists, first, mask, mode, ofd, omode;
1.97 fgsch 782: off_t size, statbytes;
1.36 deraadt 783: int setimes, targisdir, wrerrno = 0;
1.1 deraadt 784: char ch, *cp, *np, *targ, *why, *vect[1], buf[2048];
1.40 markus 785: struct timeval tv[2];
1.1 deraadt 786:
1.66 stevesk 787: #define atime tv[0]
788: #define mtime tv[1]
1.118 deraadt 789: #define SCREWUP(str) { why = str; goto screwup; }
1.1 deraadt 790:
791: setimes = targisdir = 0;
792: mask = umask(0);
793: if (!pflag)
1.18 markus 794: (void) umask(mask);
1.1 deraadt 795: if (argc != 1) {
796: run_err("ambiguous target");
797: exit(1);
798: }
799: targ = *argv;
800: if (targetshouldbedirectory)
801: verifydir(targ);
1.18 markus 802:
1.107 deraadt 803: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 804: if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
805: targisdir = 1;
806: for (first = 1;; first = 0) {
807: cp = buf;
1.122 avsm 808: if (atomicio(read, remin, cp, 1) != 1)
1.1 deraadt 809: return;
810: if (*cp++ == '\n')
811: SCREWUP("unexpected <newline>");
812: do {
1.30 deraadt 813: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 814: SCREWUP("lost connection");
815: *cp++ = ch;
816: } while (cp < &buf[sizeof(buf) - 1] && ch != '\n');
817: *cp = 0;
1.114 markus 818: if (verbose_mode)
819: fprintf(stderr, "Sink: %s", buf);
1.1 deraadt 820:
821: if (buf[0] == '\01' || buf[0] == '\02') {
822: if (iamremote == 0)
1.107 deraadt 823: (void) atomicio(vwrite, STDERR_FILENO,
1.44 deraadt 824: buf + 1, strlen(buf + 1));
1.1 deraadt 825: if (buf[0] == '\02')
826: exit(1);
827: ++errs;
828: continue;
829: }
830: if (buf[0] == 'E') {
1.107 deraadt 831: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 832: return;
833: }
834: if (ch == '\n')
835: *--cp = 0;
836:
837: cp = buf;
838: if (*cp == 'T') {
839: setimes++;
840: cp++;
1.66 stevesk 841: mtime.tv_sec = strtol(cp, &cp, 10);
842: if (!cp || *cp++ != ' ')
1.1 deraadt 843: SCREWUP("mtime.sec not delimited");
1.66 stevesk 844: mtime.tv_usec = strtol(cp, &cp, 10);
845: if (!cp || *cp++ != ' ')
1.1 deraadt 846: SCREWUP("mtime.usec not delimited");
1.66 stevesk 847: atime.tv_sec = strtol(cp, &cp, 10);
848: if (!cp || *cp++ != ' ')
1.1 deraadt 849: SCREWUP("atime.sec not delimited");
1.66 stevesk 850: atime.tv_usec = strtol(cp, &cp, 10);
851: if (!cp || *cp++ != '\0')
1.1 deraadt 852: SCREWUP("atime.usec not delimited");
1.107 deraadt 853: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 854: continue;
855: }
856: if (*cp != 'C' && *cp != 'D') {
857: /*
858: * Check for the case "rcp remote:foo\* local:bar".
859: * In this case, the line "No match." can be returned
860: * by the shell before the rcp command on the remote is
861: * executed so the ^Aerror_message convention isn't
862: * followed.
863: */
864: if (first) {
865: run_err("%s", cp);
866: exit(1);
867: }
868: SCREWUP("expected control record");
869: }
870: mode = 0;
871: for (++cp; cp < buf + 5; cp++) {
872: if (*cp < '0' || *cp > '7')
873: SCREWUP("bad mode");
874: mode = (mode << 3) | (*cp - '0');
875: }
876: if (*cp++ != ' ')
877: SCREWUP("mode not delimited");
878:
1.63 stevesk 879: for (size = 0; isdigit(*cp);)
1.1 deraadt 880: size = size * 10 + (*cp++ - '0');
881: if (*cp++ != ' ')
882: SCREWUP("size not delimited");
1.114 markus 883: if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) {
884: run_err("error: unexpected filename: %s", cp);
885: exit(1);
886: }
1.1 deraadt 887: if (targisdir) {
888: static char *namebuf;
1.124 djm 889: static size_t cursize;
1.1 deraadt 890: size_t need;
891:
892: need = strlen(targ) + strlen(cp) + 250;
1.55 deraadt 893: if (need > cursize) {
1.58 danh 894: if (namebuf)
895: xfree(namebuf);
1.18 markus 896: namebuf = xmalloc(need);
1.55 deraadt 897: cursize = need;
898: }
899: (void) snprintf(namebuf, need, "%s%s%s", targ,
1.88 mouring 900: strcmp(targ, "/") ? "/" : "", cp);
1.1 deraadt 901: np = namebuf;
902: } else
903: np = targ;
1.12 aaron 904: curfile = cp;
1.1 deraadt 905: exists = stat(np, &stb) == 0;
906: if (buf[0] == 'D') {
907: int mod_flag = pflag;
1.114 markus 908: if (!iamrecursive)
909: SCREWUP("received directory without -r");
1.1 deraadt 910: if (exists) {
911: if (!S_ISDIR(stb.st_mode)) {
912: errno = ENOTDIR;
913: goto bad;
914: }
915: if (pflag)
1.18 markus 916: (void) chmod(np, mode);
1.1 deraadt 917: } else {
1.18 markus 918: /* Handle copying from a read-only
919: directory */
1.1 deraadt 920: mod_flag = 1;
921: if (mkdir(np, mode | S_IRWXU) < 0)
922: goto bad;
923: }
1.58 danh 924: vect[0] = xstrdup(np);
1.1 deraadt 925: sink(1, vect);
926: if (setimes) {
927: setimes = 0;
1.59 deraadt 928: if (utimes(vect[0], tv) < 0)
1.18 markus 929: run_err("%s: set times: %s",
1.59 deraadt 930: vect[0], strerror(errno));
1.1 deraadt 931: }
932: if (mod_flag)
1.59 deraadt 933: (void) chmod(vect[0], mode);
934: if (vect[0])
935: xfree(vect[0]);
1.1 deraadt 936: continue;
937: }
938: omode = mode;
939: mode |= S_IWRITE;
1.71 markus 940: if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
1.1 deraadt 941: bad: run_err("%s: %s", np, strerror(errno));
942: continue;
943: }
1.107 deraadt 944: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 945: if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) {
1.18 markus 946: (void) close(ofd);
1.1 deraadt 947: continue;
948: }
949: cp = bp->buf;
950: wrerr = NO;
1.7 deraadt 951:
1.12 aaron 952: statbytes = 0;
1.97 fgsch 953: if (showprogress)
954: start_progress_meter(curfile, size, &statbytes);
1.1 deraadt 955: for (count = i = 0; i < size; i += 4096) {
956: amt = 4096;
957: if (i + amt > size)
958: amt = size - i;
959: count += amt;
960: do {
1.117 avsm 961: j = atomicio(read, remin, cp, amt);
1.122 avsm 962: if (j == 0) {
1.1 deraadt 963: run_err("%s", j ? strerror(errno) :
1.63 stevesk 964: "dropped connection");
1.1 deraadt 965: exit(1);
966: }
967: amt -= j;
968: cp += j;
1.18 markus 969: statbytes += j;
1.1 deraadt 970: } while (amt > 0);
1.112 djm 971:
1.113 djm 972: if (limit_rate)
1.99 markus 973: bwlimit(4096);
974:
1.1 deraadt 975: if (count == bp->cnt) {
976: /* Keep reading so we stay sync'd up. */
977: if (wrerr == NO) {
1.122 avsm 978: if (atomicio(vwrite, ofd, bp->buf,
979: count) != count) {
1.1 deraadt 980: wrerr = YES;
1.122 avsm 981: wrerrno = errno;
1.1 deraadt 982: }
983: }
984: count = 0;
985: cp = bp->buf;
986: }
987: }
1.7 deraadt 988: if (showprogress)
1.97 fgsch 989: stop_progress_meter();
1.1 deraadt 990: if (count != 0 && wrerr == NO &&
1.122 avsm 991: atomicio(vwrite, ofd, bp->buf, count) != count) {
1.1 deraadt 992: wrerr = YES;
1.122 avsm 993: wrerrno = errno;
1.1 deraadt 994: }
1.98 djm 995: if (wrerr == NO && ftruncate(ofd, size) != 0) {
1.1 deraadt 996: run_err("%s: truncate: %s", np, strerror(errno));
997: wrerr = DISPLAYED;
998: }
999: if (pflag) {
1000: if (exists || omode != mode)
1.116 dtucker 1001: if (fchmod(ofd, omode)) {
1.1 deraadt 1002: run_err("%s: set mode: %s",
1.63 stevesk 1003: np, strerror(errno));
1.116 dtucker 1004: wrerr = DISPLAYED;
1005: }
1.1 deraadt 1006: } else {
1007: if (!exists && omode != mode)
1.116 dtucker 1008: if (fchmod(ofd, omode & ~mask)) {
1.1 deraadt 1009: run_err("%s: set mode: %s",
1.63 stevesk 1010: np, strerror(errno));
1.116 dtucker 1011: wrerr = DISPLAYED;
1012: }
1.1 deraadt 1013: }
1.33 provos 1014: if (close(ofd) == -1) {
1015: wrerr = YES;
1016: wrerrno = errno;
1017: }
1.18 markus 1018: (void) response();
1.1 deraadt 1019: if (setimes && wrerr == NO) {
1020: setimes = 0;
1.40 markus 1021: if (utimes(np, tv) < 0) {
1.1 deraadt 1022: run_err("%s: set times: %s",
1.63 stevesk 1023: np, strerror(errno));
1.1 deraadt 1024: wrerr = DISPLAYED;
1025: }
1026: }
1.18 markus 1027: switch (wrerr) {
1.1 deraadt 1028: case YES:
1029: run_err("%s: %s", np, strerror(wrerrno));
1030: break;
1031: case NO:
1.107 deraadt 1032: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 1033: break;
1034: case DISPLAYED:
1035: break;
1036: }
1037: }
1038: screwup:
1039: run_err("protocol error: %s", why);
1040: exit(1);
1041: }
1042:
1043: int
1.86 itojun 1044: response(void)
1.1 deraadt 1045: {
1046: char ch, *cp, resp, rbuf[2048];
1047:
1.30 deraadt 1048: if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp))
1.1 deraadt 1049: lostconn(0);
1050:
1051: cp = rbuf;
1.18 markus 1052: switch (resp) {
1053: case 0: /* ok */
1.1 deraadt 1054: return (0);
1055: default:
1056: *cp++ = resp;
1057: /* FALLTHROUGH */
1.18 markus 1058: case 1: /* error, followed by error msg */
1059: case 2: /* fatal error, "" */
1.1 deraadt 1060: do {
1.30 deraadt 1061: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 1062: lostconn(0);
1063: *cp++ = ch;
1064: } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
1065:
1066: if (!iamremote)
1.107 deraadt 1067: (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf);
1.1 deraadt 1068: ++errs;
1069: if (resp == 1)
1070: return (-1);
1071: exit(1);
1072: }
1073: /* NOTREACHED */
1074: }
1075:
1076: void
1.86 itojun 1077: usage(void)
1.1 deraadt 1078: {
1.83 stevesk 1079: (void) fprintf(stderr,
1.110 jmc 1080: "usage: scp [-1246BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n"
1081: " [-l limit] [-o ssh_option] [-P port] [-S program]\n"
1.90 deraadt 1082: " [[user@]host1:]file1 [...] [[user@]host2:]file2\n");
1.1 deraadt 1083: exit(1);
1084: }
1085:
1086: void
1.18 markus 1087: run_err(const char *fmt,...)
1.1 deraadt 1088: {
1089: static FILE *fp;
1090: va_list ap;
1091:
1092: ++errs;
1093: if (fp == NULL && !(fp = fdopen(remout, "w")))
1094: return;
1.18 markus 1095: (void) fprintf(fp, "%c", 0x01);
1096: (void) fprintf(fp, "scp: ");
1.73 markus 1097: va_start(ap, fmt);
1.18 markus 1098: (void) vfprintf(fp, fmt, ap);
1.73 markus 1099: va_end(ap);
1.18 markus 1100: (void) fprintf(fp, "\n");
1101: (void) fflush(fp);
1102:
1103: if (!iamremote) {
1.73 markus 1104: va_start(ap, fmt);
1.18 markus 1105: vfprintf(stderr, fmt, ap);
1.73 markus 1106: va_end(ap);
1.18 markus 1107: fprintf(stderr, "\n");
1108: }
1.1 deraadt 1109: }
1110:
1111: void
1.104 djm 1112: verifydir(char *cp)
1.1 deraadt 1113: {
1114: struct stat stb;
1115:
1116: if (!stat(cp, &stb)) {
1117: if (S_ISDIR(stb.st_mode))
1118: return;
1119: errno = ENOTDIR;
1120: }
1121: run_err("%s: %s", cp, strerror(errno));
1.123 avsm 1122: killchild(0);
1.1 deraadt 1123: }
1124:
1125: int
1.104 djm 1126: okname(char *cp0)
1.1 deraadt 1127: {
1128: int c;
1129: char *cp;
1130:
1131: cp = cp0;
1132: do {
1.75 deraadt 1133: c = (int)*cp;
1.1 deraadt 1134: if (c & 0200)
1135: goto bad;
1.101 markus 1136: if (!isalpha(c) && !isdigit(c)) {
1137: switch (c) {
1138: case '\'':
1139: case '"':
1140: case '`':
1141: case ' ':
1142: case '#':
1143: goto bad;
1144: default:
1145: break;
1146: }
1147: }
1.1 deraadt 1148: } while (*++cp);
1149: return (1);
1150:
1.25 markus 1151: bad: fprintf(stderr, "%s: invalid user name\n", cp0);
1.1 deraadt 1152: return (0);
1153: }
1154:
1155: BUF *
1.104 djm 1156: allocbuf(BUF *bp, int fd, int blksize)
1.1 deraadt 1157: {
1158: size_t size;
1159: struct stat stb;
1160:
1161: if (fstat(fd, &stb) < 0) {
1162: run_err("fstat: %s", strerror(errno));
1163: return (0);
1164: }
1.95 markus 1165: size = roundup(stb.st_blksize, blksize);
1166: if (size == 0)
1.18 markus 1167: size = blksize;
1.1 deraadt 1168: if (bp->cnt >= size)
1169: return (bp);
1.18 markus 1170: if (bp->buf == NULL)
1171: bp->buf = xmalloc(size);
1172: else
1173: bp->buf = xrealloc(bp->buf, size);
1.81 markus 1174: memset(bp->buf, 0, size);
1.1 deraadt 1175: bp->cnt = size;
1176: return (bp);
1177: }
1178:
1179: void
1.104 djm 1180: lostconn(int signo)
1.1 deraadt 1181: {
1182: if (!iamremote)
1.74 markus 1183: write(STDERR_FILENO, "lost connection\n", 16);
1184: if (signo)
1185: _exit(1);
1186: else
1187: exit(1);
1.4 aaron 1188: }
![[BACK]](/icons/back.gif){kind=icon}
Return to scp.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / ssh