Annotation of src/usr.bin/ssh/scp.c, Revision 1.141
1.141 ! djm 1: /* $OpenBSD: scp.c,v 1.140 2006/04/01 05:42:20 deraadt 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>
1.133 stevesk 82: #include <signal.h>
1.1 deraadt 83:
84: #include "xmalloc.h"
1.51 markus 85: #include "atomicio.h"
1.50 markus 86: #include "pathnames.h"
1.51 markus 87: #include "log.h"
1.69 mouring 88: #include "misc.h"
1.97 fgsch 89: #include "progressmeter.h"
1.1 deraadt 90:
1.140 deraadt 91: int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout);
1.11 aaron 92:
1.99 markus 93: void bwlimit(int);
94:
1.70 mouring 95: /* Struct for addargs */
96: arglist args;
1.41 markus 97:
1.99 markus 98: /* Bandwidth limit */
1.113 djm 99: off_t limit_rate = 0;
1.99 markus 100:
1.11 aaron 101: /* Name of current file being transferred. */
102: char *curfile;
1.4 aaron 103:
1.1 deraadt 104: /* This is set to non-zero to enable verbose mode. */
1.17 markus 105: int verbose_mode = 0;
1.1 deraadt 106:
1.6 aaron 107: /* This is set to zero if the progressmeter is not desired. */
108: int showprogress = 1;
109:
1.34 deraadt 110: /* This is the program to execute for the secured connection. ("ssh" or -S) */
1.50 markus 111: char *ssh_program = _PATH_SSH_PROGRAM;
1.34 deraadt 112:
1.92 markus 113: /* This is used to store the pid of ssh_program */
1.105 djm 114: pid_t do_cmd_pid = -1;
115:
116: static void
117: killchild(int signo)
118: {
1.119 dtucker 119: if (do_cmd_pid > 1) {
1.123 avsm 120: kill(do_cmd_pid, signo ? signo : SIGTERM);
1.119 dtucker 121: waitpid(do_cmd_pid, NULL, 0);
122: }
1.105 djm 123:
1.123 avsm 124: if (signo)
125: _exit(1);
126: exit(1);
1.105 djm 127: }
1.92 markus 128:
1.129 djm 129: static int
130: do_local_cmd(arglist *a)
131: {
132: u_int i;
133: int status;
134: pid_t pid;
135:
136: if (a->num == 0)
137: fatal("do_local_cmd: no arguments");
138:
139: if (verbose_mode) {
140: fprintf(stderr, "Executing:");
141: for (i = 0; i < a->num; i++)
142: fprintf(stderr, " %s", a->list[i]);
143: fprintf(stderr, "\n");
144: }
145: if ((pid = fork()) == -1)
146: fatal("do_local_cmd: fork: %s", strerror(errno));
147:
148: if (pid == 0) {
149: execvp(a->list[0], a->list);
150: perror(a->list[0]);
151: exit(1);
152: }
153:
154: do_cmd_pid = pid;
155: signal(SIGTERM, killchild);
156: signal(SIGINT, killchild);
157: signal(SIGHUP, killchild);
158:
159: while (waitpid(pid, &status, 0) == -1)
160: if (errno != EINTR)
161: fatal("do_local_cmd: waitpid: %s", strerror(errno));
162:
163: do_cmd_pid = -1;
164:
165: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
166: return (-1);
167:
168: return (0);
169: }
170:
1.20 markus 171: /*
172: * This function executes the given command as the specified user on the
173: * given host. This returns < 0 if execution fails, and >= 0 otherwise. This
174: * assigns the input and output file descriptors on success.
175: */
1.1 deraadt 176:
1.27 markus 177: int
1.140 deraadt 178: do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout)
1.1 deraadt 179: {
1.18 markus 180: int pin[2], pout[2], reserved[2];
181:
182: if (verbose_mode)
1.78 deraadt 183: fprintf(stderr,
184: "Executing: program %s host %s, user %s, command %s\n",
185: ssh_program, host,
186: remuser ? remuser : "(unspecified)", cmd);
1.18 markus 187:
1.20 markus 188: /*
189: * Reserve two descriptors so that the real pipes won't get
190: * descriptors 0 and 1 because that will screw up dup2 below.
191: */
1.18 markus 192: pipe(reserved);
193:
194: /* Create a socket pair for communicating with ssh. */
195: if (pipe(pin) < 0)
196: fatal("pipe: %s", strerror(errno));
197: if (pipe(pout) < 0)
198: fatal("pipe: %s", strerror(errno));
199:
200: /* Free the reserved descriptors. */
201: close(reserved[0]);
202: close(reserved[1]);
203:
1.106 nino 204: /* Fork a child to execute the command on the remote host using ssh. */
1.92 markus 205: do_cmd_pid = fork();
206: if (do_cmd_pid == 0) {
1.18 markus 207: /* Child. */
208: close(pin[1]);
209: close(pout[0]);
210: dup2(pin[0], 0);
211: dup2(pout[1], 1);
212: close(pin[0]);
213: close(pout[1]);
214:
1.129 djm 215: replacearg(&args, 0, "%s", ssh_program);
1.41 markus 216: if (remuser != NULL)
1.70 mouring 217: addargs(&args, "-l%s", remuser);
218: addargs(&args, "%s", host);
219: addargs(&args, "%s", cmd);
1.18 markus 220:
1.41 markus 221: execvp(ssh_program, args.list);
1.34 deraadt 222: perror(ssh_program);
1.18 markus 223: exit(1);
1.92 markus 224: } else if (do_cmd_pid == -1) {
225: fatal("fork: %s", strerror(errno));
1.18 markus 226: }
227: /* Parent. Close the other side, and return the local side. */
228: close(pin[0]);
229: *fdout = pin[1];
230: close(pout[1]);
231: *fdin = pout[0];
1.105 djm 232: signal(SIGTERM, killchild);
233: signal(SIGINT, killchild);
234: signal(SIGHUP, killchild);
1.18 markus 235: return 0;
1.1 deraadt 236: }
237:
238: typedef struct {
1.124 djm 239: size_t cnt;
1.1 deraadt 240: char *buf;
241: } BUF;
242:
1.18 markus 243: BUF *allocbuf(BUF *, int, int);
244: void lostconn(int);
245: 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: {
1.120 deraadt 414: char *bp, *host, *src, *suser, *thost, *tuser, *arg;
1.129 djm 415: arglist alist;
1.140 deraadt 416: int i;
1.129 djm 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) {
1.141 ! djm 481: xasprintf(&bp, "%s -t %s", cmd, targ);
1.23 markus 482: host = cleanhostname(thost);
1.35 deraadt 483: if (do_cmd(host, tuser, bp, &remin,
1.140 deraadt 484: &remout) < 0)
1.18 markus 485: exit(1);
1.1 deraadt 486: if (response() < 0)
487: exit(1);
1.18 markus 488: (void) xfree(bp);
1.1 deraadt 489: }
1.18 markus 490: source(1, argv + i);
1.1 deraadt 491: }
492: }
493: }
494:
495: void
1.104 djm 496: tolocal(int argc, char **argv)
1.1 deraadt 497: {
498: char *bp, *host, *src, *suser;
1.129 djm 499: arglist alist;
1.140 deraadt 500: int i;
1.129 djm 501:
502: memset(&alist, '\0', sizeof(alist));
503: alist.list = NULL;
1.1 deraadt 504:
505: for (i = 0; i < argc - 1; i++) {
1.18 markus 506: if (!(src = colon(argv[i]))) { /* Local to local. */
1.129 djm 507: freeargs(&alist);
508: addargs(&alist, "%s", _PATH_CP);
509: if (iamrecursive)
510: addargs(&alist, "-r");
511: if (pflag)
512: addargs(&alist, "-p");
513: addargs(&alist, "%s", argv[i]);
514: addargs(&alist, "%s", argv[argc-1]);
515: if (do_local_cmd(&alist))
1.1 deraadt 516: ++errs;
517: continue;
518: }
519: *src++ = 0;
520: if (*src == 0)
521: src = ".";
1.94 markus 522: if ((host = strrchr(argv[i], '@')) == NULL) {
1.1 deraadt 523: host = argv[i];
524: suser = NULL;
525: } else {
526: *host++ = 0;
527: suser = argv[i];
528: if (*suser == '\0')
529: suser = pwd->pw_name;
530: }
1.23 markus 531: host = cleanhostname(host);
1.141 ! djm 532: xasprintf(&bp, "%s -f %s", cmd, src);
1.140 deraadt 533: if (do_cmd(host, suser, bp, &remin, &remout) < 0) {
1.18 markus 534: (void) xfree(bp);
535: ++errs;
536: continue;
1.1 deraadt 537: }
1.18 markus 538: xfree(bp);
1.1 deraadt 539: sink(1, argv + argc - 1);
1.18 markus 540: (void) close(remin);
1.1 deraadt 541: remin = remout = -1;
542: }
543: }
544:
545: void
1.104 djm 546: source(int argc, char **argv)
1.1 deraadt 547: {
548: struct stat stb;
549: static BUF buffer;
550: BUF *bp;
1.122 avsm 551: off_t i, amt, statbytes;
552: size_t result;
1.125 dtucker 553: int fd = -1, haderr, indx;
1.1 deraadt 554: char *last, *name, buf[2048];
1.65 deraadt 555: int len;
1.1 deraadt 556:
557: for (indx = 0; indx < argc; ++indx) {
1.18 markus 558: name = argv[indx];
1.11 aaron 559: statbytes = 0;
1.65 deraadt 560: len = strlen(name);
561: while (len > 1 && name[len-1] == '/')
562: name[--len] = '\0';
1.85 markus 563: if (strchr(name, '\n') != NULL) {
564: run_err("%s: skipping, filename contains a newline",
565: name);
566: goto next;
567: }
1.1 deraadt 568: if ((fd = open(name, O_RDONLY, 0)) < 0)
569: goto syserr;
570: if (fstat(fd, &stb) < 0) {
571: syserr: run_err("%s: %s", name, strerror(errno));
572: goto next;
573: }
574: switch (stb.st_mode & S_IFMT) {
575: case S_IFREG:
576: break;
577: case S_IFDIR:
578: if (iamrecursive) {
579: rsource(name, &stb);
580: goto next;
581: }
582: /* FALLTHROUGH */
583: default:
584: run_err("%s: not a regular file", name);
585: goto next;
586: }
587: if ((last = strrchr(name, '/')) == NULL)
588: last = name;
589: else
590: ++last;
1.11 aaron 591: curfile = last;
1.1 deraadt 592: if (pflag) {
593: /*
594: * Make it compatible with possible future
595: * versions expecting microseconds.
596: */
1.55 deraadt 597: (void) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n",
1.47 markus 598: (u_long) stb.st_mtime,
599: (u_long) stb.st_atime);
1.107 deraadt 600: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 601: if (response() < 0)
602: goto next;
603: }
604: #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
1.61 markus 605: snprintf(buf, sizeof buf, "C%04o %lld %s\n",
1.47 markus 606: (u_int) (stb.st_mode & FILEMODEMASK),
1.62 markus 607: (long long)stb.st_size, last);
1.18 markus 608: if (verbose_mode) {
609: fprintf(stderr, "Sending file modes: %s", buf);
610: }
1.107 deraadt 611: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 612: if (response() < 0)
613: goto next;
614: if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) {
1.127 deraadt 615: next: if (fd != -1) {
616: (void) close(fd);
617: fd = -1;
618: }
1.1 deraadt 619: continue;
620: }
1.97 fgsch 621: if (showprogress)
622: start_progress_meter(curfile, stb.st_size, &statbytes);
1.1 deraadt 623: /* Keep writing after an error so that we stay sync'd up. */
624: for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
625: amt = bp->cnt;
626: if (i + amt > stb.st_size)
627: amt = stb.st_size - i;
628: if (!haderr) {
1.30 deraadt 629: result = atomicio(read, fd, bp->buf, amt);
1.1 deraadt 630: if (result != amt)
1.122 avsm 631: haderr = errno;
1.1 deraadt 632: }
633: if (haderr)
1.107 deraadt 634: (void) atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 635: else {
1.107 deraadt 636: result = atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 637: if (result != amt)
1.122 avsm 638: haderr = errno;
1.4 aaron 639: statbytes += result;
1.1 deraadt 640: }
1.113 djm 641: if (limit_rate)
1.99 markus 642: bwlimit(amt);
1.1 deraadt 643: }
1.18 markus 644: if (showprogress)
1.97 fgsch 645: stop_progress_meter();
1.4 aaron 646:
1.127 deraadt 647: if (fd != -1) {
648: if (close(fd) < 0 && !haderr)
649: haderr = errno;
650: fd = -1;
651: }
1.1 deraadt 652: if (!haderr)
1.107 deraadt 653: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 654: else
655: run_err("%s: %s", name, strerror(haderr));
1.18 markus 656: (void) response();
1.1 deraadt 657: }
658: }
659:
660: void
1.104 djm 661: rsource(char *name, struct stat *statp)
1.1 deraadt 662: {
663: DIR *dirp;
664: struct dirent *dp;
665: char *last, *vect[1], path[1100];
666:
667: if (!(dirp = opendir(name))) {
668: run_err("%s: %s", name, strerror(errno));
669: return;
670: }
671: last = strrchr(name, '/');
672: if (last == 0)
673: last = name;
674: else
675: last++;
676: if (pflag) {
1.55 deraadt 677: (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n",
1.47 markus 678: (u_long) statp->st_mtime,
679: (u_long) statp->st_atime);
1.107 deraadt 680: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 681: if (response() < 0) {
682: closedir(dirp);
683: return;
684: }
685: }
1.55 deraadt 686: (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n",
1.47 markus 687: (u_int) (statp->st_mode & FILEMODEMASK), 0, last);
1.18 markus 688: if (verbose_mode)
689: fprintf(stderr, "Entering directory: %s", path);
1.107 deraadt 690: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 691: if (response() < 0) {
692: closedir(dirp);
693: return;
694: }
1.63 stevesk 695: while ((dp = readdir(dirp)) != NULL) {
1.1 deraadt 696: if (dp->d_ino == 0)
697: continue;
698: if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
699: continue;
700: if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) {
701: run_err("%s/%s: name too long", name, dp->d_name);
702: continue;
703: }
1.55 deraadt 704: (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name);
1.1 deraadt 705: vect[0] = path;
706: source(1, vect);
707: }
1.18 markus 708: (void) closedir(dirp);
1.107 deraadt 709: (void) atomicio(vwrite, remout, "E\n", 2);
1.18 markus 710: (void) response();
1.1 deraadt 711: }
712:
713: void
1.99 markus 714: bwlimit(int amount)
715: {
716: static struct timeval bwstart, bwend;
717: static int lamt, thresh = 16384;
1.115 avsm 718: u_int64_t waitlen;
1.99 markus 719: struct timespec ts, rm;
720:
721: if (!timerisset(&bwstart)) {
722: gettimeofday(&bwstart, NULL);
723: return;
724: }
725:
726: lamt += amount;
727: if (lamt < thresh)
728: return;
729:
730: gettimeofday(&bwend, NULL);
731: timersub(&bwend, &bwstart, &bwend);
732: if (!timerisset(&bwend))
733: return;
734:
735: lamt *= 8;
1.115 avsm 736: waitlen = (double)1000000L * lamt / limit_rate;
1.99 markus 737:
1.115 avsm 738: bwstart.tv_sec = waitlen / 1000000L;
739: bwstart.tv_usec = waitlen % 1000000L;
1.99 markus 740:
741: if (timercmp(&bwstart, &bwend, >)) {
742: timersub(&bwstart, &bwend, &bwend);
743:
744: /* Adjust the wait time */
745: if (bwend.tv_sec) {
746: thresh /= 2;
747: if (thresh < 2048)
748: thresh = 2048;
749: } else if (bwend.tv_usec < 100) {
750: thresh *= 2;
751: if (thresh > 32768)
752: thresh = 32768;
753: }
754:
755: TIMEVAL_TO_TIMESPEC(&bwend, &ts);
756: while (nanosleep(&ts, &rm) == -1) {
757: if (errno != EINTR)
758: break;
759: ts = rm;
760: }
761: }
762:
763: lamt = 0;
764: gettimeofday(&bwstart, NULL);
765: }
766:
767: void
1.104 djm 768: sink(int argc, char **argv)
1.1 deraadt 769: {
770: static BUF buffer;
771: struct stat stb;
1.18 markus 772: enum {
773: YES, NO, DISPLAYED
774: } wrerr;
1.1 deraadt 775: BUF *bp;
1.122 avsm 776: off_t i;
1.124 djm 777: size_t j, count;
1.140 deraadt 778: int amt, exists, first, ofd;
779: mode_t mode, omode, mask;
1.97 fgsch 780: off_t size, statbytes;
1.36 deraadt 781: int setimes, targisdir, wrerrno = 0;
1.1 deraadt 782: char ch, *cp, *np, *targ, *why, *vect[1], buf[2048];
1.40 markus 783: struct timeval tv[2];
1.1 deraadt 784:
1.66 stevesk 785: #define atime tv[0]
786: #define mtime tv[1]
1.118 deraadt 787: #define SCREWUP(str) { why = str; goto screwup; }
1.1 deraadt 788:
789: setimes = targisdir = 0;
790: mask = umask(0);
791: if (!pflag)
1.18 markus 792: (void) umask(mask);
1.1 deraadt 793: if (argc != 1) {
794: run_err("ambiguous target");
795: exit(1);
796: }
797: targ = *argv;
798: if (targetshouldbedirectory)
799: verifydir(targ);
1.18 markus 800:
1.107 deraadt 801: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 802: if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
803: targisdir = 1;
804: for (first = 1;; first = 0) {
805: cp = buf;
1.122 avsm 806: if (atomicio(read, remin, cp, 1) != 1)
1.1 deraadt 807: return;
808: if (*cp++ == '\n')
809: SCREWUP("unexpected <newline>");
810: do {
1.30 deraadt 811: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 812: SCREWUP("lost connection");
813: *cp++ = ch;
814: } while (cp < &buf[sizeof(buf) - 1] && ch != '\n');
815: *cp = 0;
1.114 markus 816: if (verbose_mode)
817: fprintf(stderr, "Sink: %s", buf);
1.1 deraadt 818:
819: if (buf[0] == '\01' || buf[0] == '\02') {
820: if (iamremote == 0)
1.107 deraadt 821: (void) atomicio(vwrite, STDERR_FILENO,
1.44 deraadt 822: buf + 1, strlen(buf + 1));
1.1 deraadt 823: if (buf[0] == '\02')
824: exit(1);
825: ++errs;
826: continue;
827: }
828: if (buf[0] == 'E') {
1.107 deraadt 829: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 830: return;
831: }
832: if (ch == '\n')
833: *--cp = 0;
834:
835: cp = buf;
836: if (*cp == 'T') {
837: setimes++;
838: cp++;
1.66 stevesk 839: mtime.tv_sec = strtol(cp, &cp, 10);
840: if (!cp || *cp++ != ' ')
1.1 deraadt 841: SCREWUP("mtime.sec not delimited");
1.66 stevesk 842: mtime.tv_usec = strtol(cp, &cp, 10);
843: if (!cp || *cp++ != ' ')
1.1 deraadt 844: SCREWUP("mtime.usec not delimited");
1.66 stevesk 845: atime.tv_sec = strtol(cp, &cp, 10);
846: if (!cp || *cp++ != ' ')
1.1 deraadt 847: SCREWUP("atime.sec not delimited");
1.66 stevesk 848: atime.tv_usec = strtol(cp, &cp, 10);
849: if (!cp || *cp++ != '\0')
1.1 deraadt 850: SCREWUP("atime.usec not delimited");
1.107 deraadt 851: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 852: continue;
853: }
854: if (*cp != 'C' && *cp != 'D') {
855: /*
856: * Check for the case "rcp remote:foo\* local:bar".
857: * In this case, the line "No match." can be returned
858: * by the shell before the rcp command on the remote is
859: * executed so the ^Aerror_message convention isn't
860: * followed.
861: */
862: if (first) {
863: run_err("%s", cp);
864: exit(1);
865: }
866: SCREWUP("expected control record");
867: }
868: mode = 0;
869: for (++cp; cp < buf + 5; cp++) {
870: if (*cp < '0' || *cp > '7')
871: SCREWUP("bad mode");
872: mode = (mode << 3) | (*cp - '0');
873: }
874: if (*cp++ != ' ')
875: SCREWUP("mode not delimited");
876:
1.63 stevesk 877: for (size = 0; isdigit(*cp);)
1.1 deraadt 878: size = size * 10 + (*cp++ - '0');
879: if (*cp++ != ' ')
880: SCREWUP("size not delimited");
1.114 markus 881: if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) {
882: run_err("error: unexpected filename: %s", cp);
883: exit(1);
884: }
1.1 deraadt 885: if (targisdir) {
886: static char *namebuf;
1.124 djm 887: static size_t cursize;
1.1 deraadt 888: size_t need;
889:
890: need = strlen(targ) + strlen(cp) + 250;
1.55 deraadt 891: if (need > cursize) {
1.58 danh 892: if (namebuf)
893: xfree(namebuf);
1.18 markus 894: namebuf = xmalloc(need);
1.55 deraadt 895: cursize = need;
896: }
897: (void) snprintf(namebuf, need, "%s%s%s", targ,
1.88 mouring 898: strcmp(targ, "/") ? "/" : "", cp);
1.1 deraadt 899: np = namebuf;
900: } else
901: np = targ;
1.12 aaron 902: curfile = cp;
1.1 deraadt 903: exists = stat(np, &stb) == 0;
904: if (buf[0] == 'D') {
905: int mod_flag = pflag;
1.114 markus 906: if (!iamrecursive)
907: SCREWUP("received directory without -r");
1.1 deraadt 908: if (exists) {
909: if (!S_ISDIR(stb.st_mode)) {
910: errno = ENOTDIR;
911: goto bad;
912: }
913: if (pflag)
1.18 markus 914: (void) chmod(np, mode);
1.1 deraadt 915: } else {
1.18 markus 916: /* Handle copying from a read-only
917: directory */
1.1 deraadt 918: mod_flag = 1;
919: if (mkdir(np, mode | S_IRWXU) < 0)
920: goto bad;
921: }
1.58 danh 922: vect[0] = xstrdup(np);
1.1 deraadt 923: sink(1, vect);
924: if (setimes) {
925: setimes = 0;
1.59 deraadt 926: if (utimes(vect[0], tv) < 0)
1.18 markus 927: run_err("%s: set times: %s",
1.59 deraadt 928: vect[0], strerror(errno));
1.1 deraadt 929: }
930: if (mod_flag)
1.59 deraadt 931: (void) chmod(vect[0], mode);
932: if (vect[0])
933: xfree(vect[0]);
1.1 deraadt 934: continue;
935: }
936: omode = mode;
937: mode |= S_IWRITE;
1.71 markus 938: if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
1.1 deraadt 939: bad: run_err("%s: %s", np, strerror(errno));
940: continue;
941: }
1.107 deraadt 942: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 943: if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) {
1.18 markus 944: (void) close(ofd);
1.1 deraadt 945: continue;
946: }
947: cp = bp->buf;
948: wrerr = NO;
1.7 deraadt 949:
1.12 aaron 950: statbytes = 0;
1.97 fgsch 951: if (showprogress)
952: start_progress_meter(curfile, size, &statbytes);
1.1 deraadt 953: for (count = i = 0; i < size; i += 4096) {
954: amt = 4096;
955: if (i + amt > size)
956: amt = size - i;
957: count += amt;
958: do {
1.117 avsm 959: j = atomicio(read, remin, cp, amt);
1.122 avsm 960: if (j == 0) {
1.1 deraadt 961: run_err("%s", j ? strerror(errno) :
1.63 stevesk 962: "dropped connection");
1.1 deraadt 963: exit(1);
964: }
965: amt -= j;
966: cp += j;
1.18 markus 967: statbytes += j;
1.1 deraadt 968: } while (amt > 0);
1.112 djm 969:
1.113 djm 970: if (limit_rate)
1.99 markus 971: bwlimit(4096);
972:
1.1 deraadt 973: if (count == bp->cnt) {
974: /* Keep reading so we stay sync'd up. */
975: if (wrerr == NO) {
1.122 avsm 976: if (atomicio(vwrite, ofd, bp->buf,
977: count) != count) {
1.1 deraadt 978: wrerr = YES;
1.122 avsm 979: wrerrno = errno;
1.1 deraadt 980: }
981: }
982: count = 0;
983: cp = bp->buf;
984: }
985: }
1.7 deraadt 986: if (showprogress)
1.97 fgsch 987: stop_progress_meter();
1.1 deraadt 988: if (count != 0 && wrerr == NO &&
1.122 avsm 989: atomicio(vwrite, ofd, bp->buf, count) != count) {
1.1 deraadt 990: wrerr = YES;
1.122 avsm 991: wrerrno = errno;
1.1 deraadt 992: }
1.98 djm 993: if (wrerr == NO && ftruncate(ofd, size) != 0) {
1.1 deraadt 994: run_err("%s: truncate: %s", np, strerror(errno));
995: wrerr = DISPLAYED;
996: }
997: if (pflag) {
998: if (exists || omode != mode)
1.116 dtucker 999: if (fchmod(ofd, omode)) {
1.1 deraadt 1000: run_err("%s: set mode: %s",
1.63 stevesk 1001: np, strerror(errno));
1.116 dtucker 1002: wrerr = DISPLAYED;
1003: }
1.1 deraadt 1004: } else {
1005: if (!exists && omode != mode)
1.116 dtucker 1006: if (fchmod(ofd, omode & ~mask)) {
1.1 deraadt 1007: run_err("%s: set mode: %s",
1.63 stevesk 1008: np, strerror(errno));
1.116 dtucker 1009: wrerr = DISPLAYED;
1010: }
1.1 deraadt 1011: }
1.33 provos 1012: if (close(ofd) == -1) {
1013: wrerr = YES;
1014: wrerrno = errno;
1015: }
1.18 markus 1016: (void) response();
1.1 deraadt 1017: if (setimes && wrerr == NO) {
1018: setimes = 0;
1.40 markus 1019: if (utimes(np, tv) < 0) {
1.1 deraadt 1020: run_err("%s: set times: %s",
1.63 stevesk 1021: np, strerror(errno));
1.1 deraadt 1022: wrerr = DISPLAYED;
1023: }
1024: }
1.18 markus 1025: switch (wrerr) {
1.1 deraadt 1026: case YES:
1027: run_err("%s: %s", np, strerror(wrerrno));
1028: break;
1029: case NO:
1.107 deraadt 1030: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 1031: break;
1032: case DISPLAYED:
1033: break;
1034: }
1035: }
1036: screwup:
1037: run_err("protocol error: %s", why);
1038: exit(1);
1039: }
1040:
1041: int
1.86 itojun 1042: response(void)
1.1 deraadt 1043: {
1044: char ch, *cp, resp, rbuf[2048];
1045:
1.30 deraadt 1046: if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp))
1.1 deraadt 1047: lostconn(0);
1048:
1049: cp = rbuf;
1.18 markus 1050: switch (resp) {
1051: case 0: /* ok */
1.1 deraadt 1052: return (0);
1053: default:
1054: *cp++ = resp;
1055: /* FALLTHROUGH */
1.18 markus 1056: case 1: /* error, followed by error msg */
1057: case 2: /* fatal error, "" */
1.1 deraadt 1058: do {
1.30 deraadt 1059: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 1060: lostconn(0);
1061: *cp++ = ch;
1062: } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
1063:
1064: if (!iamremote)
1.107 deraadt 1065: (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf);
1.1 deraadt 1066: ++errs;
1067: if (resp == 1)
1068: return (-1);
1069: exit(1);
1070: }
1071: /* NOTREACHED */
1072: }
1073:
1074: void
1.86 itojun 1075: usage(void)
1.1 deraadt 1076: {
1.83 stevesk 1077: (void) fprintf(stderr,
1.110 jmc 1078: "usage: scp [-1246BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n"
1079: " [-l limit] [-o ssh_option] [-P port] [-S program]\n"
1.90 deraadt 1080: " [[user@]host1:]file1 [...] [[user@]host2:]file2\n");
1.1 deraadt 1081: exit(1);
1082: }
1083:
1084: void
1.18 markus 1085: run_err(const char *fmt,...)
1.1 deraadt 1086: {
1087: static FILE *fp;
1088: va_list ap;
1089:
1090: ++errs;
1.136 biorn 1091: if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) {
1092: (void) fprintf(fp, "%c", 0x01);
1093: (void) fprintf(fp, "scp: ");
1094: va_start(ap, fmt);
1095: (void) vfprintf(fp, fmt, ap);
1096: va_end(ap);
1097: (void) fprintf(fp, "\n");
1098: (void) fflush(fp);
1099: }
1.18 markus 1100:
1101: if (!iamremote) {
1.73 markus 1102: va_start(ap, fmt);
1.18 markus 1103: vfprintf(stderr, fmt, ap);
1.73 markus 1104: va_end(ap);
1.18 markus 1105: fprintf(stderr, "\n");
1106: }
1.1 deraadt 1107: }
1108:
1109: void
1.104 djm 1110: verifydir(char *cp)
1.1 deraadt 1111: {
1112: struct stat stb;
1113:
1114: if (!stat(cp, &stb)) {
1115: if (S_ISDIR(stb.st_mode))
1116: return;
1117: errno = ENOTDIR;
1118: }
1119: run_err("%s: %s", cp, strerror(errno));
1.123 avsm 1120: killchild(0);
1.1 deraadt 1121: }
1122:
1123: int
1.104 djm 1124: okname(char *cp0)
1.1 deraadt 1125: {
1126: int c;
1127: char *cp;
1128:
1129: cp = cp0;
1130: do {
1.75 deraadt 1131: c = (int)*cp;
1.1 deraadt 1132: if (c & 0200)
1133: goto bad;
1.101 markus 1134: if (!isalpha(c) && !isdigit(c)) {
1135: switch (c) {
1136: case '\'':
1137: case '"':
1138: case '`':
1139: case ' ':
1140: case '#':
1141: goto bad;
1142: default:
1143: break;
1144: }
1145: }
1.1 deraadt 1146: } while (*++cp);
1147: return (1);
1148:
1.25 markus 1149: bad: fprintf(stderr, "%s: invalid user name\n", cp0);
1.1 deraadt 1150: return (0);
1151: }
1152:
1153: BUF *
1.104 djm 1154: allocbuf(BUF *bp, int fd, int blksize)
1.1 deraadt 1155: {
1156: size_t size;
1157: struct stat stb;
1158:
1159: if (fstat(fd, &stb) < 0) {
1160: run_err("fstat: %s", strerror(errno));
1161: return (0);
1162: }
1.95 markus 1163: size = roundup(stb.st_blksize, blksize);
1164: if (size == 0)
1.18 markus 1165: size = blksize;
1.1 deraadt 1166: if (bp->cnt >= size)
1167: return (bp);
1.18 markus 1168: if (bp->buf == NULL)
1169: bp->buf = xmalloc(size);
1170: else
1.138 djm 1171: bp->buf = xrealloc(bp->buf, 1, size);
1.81 markus 1172: memset(bp->buf, 0, size);
1.1 deraadt 1173: bp->cnt = size;
1174: return (bp);
1175: }
1176:
1177: void
1.104 djm 1178: lostconn(int signo)
1.1 deraadt 1179: {
1180: if (!iamremote)
1.74 markus 1181: write(STDERR_FILENO, "lost connection\n", 16);
1182: if (signo)
1183: _exit(1);
1184: else
1185: exit(1);
1.4 aaron 1186: }
![[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