Annotation of src/usr.bin/ssh/scp.c, Revision 1.148
1.148 ! stevesk 1: /* $OpenBSD: scp.c,v 1.147 2006/07/11 20:07:25 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>
1.147 stevesk 82: #include <errno.h>
1.144 stevesk 83: #include <fcntl.h>
1.143 stevesk 84: #include <pwd.h>
1.133 stevesk 85: #include <signal.h>
1.146 stevesk 86: #include <stdarg.h>
1.148 ! stevesk 87: #include <unistd.h>
1.1 deraadt 88:
89: #include "xmalloc.h"
1.51 markus 90: #include "atomicio.h"
1.50 markus 91: #include "pathnames.h"
1.51 markus 92: #include "log.h"
1.69 mouring 93: #include "misc.h"
1.97 fgsch 94: #include "progressmeter.h"
1.1 deraadt 95:
1.140 deraadt 96: int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout);
1.11 aaron 97:
1.99 markus 98: void bwlimit(int);
99:
1.70 mouring 100: /* Struct for addargs */
101: arglist args;
1.41 markus 102:
1.99 markus 103: /* Bandwidth limit */
1.113 djm 104: off_t limit_rate = 0;
1.99 markus 105:
1.11 aaron 106: /* Name of current file being transferred. */
107: char *curfile;
1.4 aaron 108:
1.1 deraadt 109: /* This is set to non-zero to enable verbose mode. */
1.17 markus 110: int verbose_mode = 0;
1.1 deraadt 111:
1.6 aaron 112: /* This is set to zero if the progressmeter is not desired. */
113: int showprogress = 1;
114:
1.34 deraadt 115: /* This is the program to execute for the secured connection. ("ssh" or -S) */
1.50 markus 116: char *ssh_program = _PATH_SSH_PROGRAM;
1.34 deraadt 117:
1.92 markus 118: /* This is used to store the pid of ssh_program */
1.105 djm 119: pid_t do_cmd_pid = -1;
120:
121: static void
122: killchild(int signo)
123: {
1.119 dtucker 124: if (do_cmd_pid > 1) {
1.123 avsm 125: kill(do_cmd_pid, signo ? signo : SIGTERM);
1.119 dtucker 126: waitpid(do_cmd_pid, NULL, 0);
127: }
1.105 djm 128:
1.123 avsm 129: if (signo)
130: _exit(1);
131: exit(1);
1.105 djm 132: }
1.92 markus 133:
1.129 djm 134: static int
135: do_local_cmd(arglist *a)
136: {
137: u_int i;
138: int status;
139: pid_t pid;
140:
141: if (a->num == 0)
142: fatal("do_local_cmd: no arguments");
143:
144: if (verbose_mode) {
145: fprintf(stderr, "Executing:");
146: for (i = 0; i < a->num; i++)
147: fprintf(stderr, " %s", a->list[i]);
148: fprintf(stderr, "\n");
149: }
150: if ((pid = fork()) == -1)
151: fatal("do_local_cmd: fork: %s", strerror(errno));
152:
153: if (pid == 0) {
154: execvp(a->list[0], a->list);
155: perror(a->list[0]);
156: exit(1);
157: }
158:
159: do_cmd_pid = pid;
160: signal(SIGTERM, killchild);
161: signal(SIGINT, killchild);
162: signal(SIGHUP, killchild);
163:
164: while (waitpid(pid, &status, 0) == -1)
165: if (errno != EINTR)
166: fatal("do_local_cmd: waitpid: %s", strerror(errno));
167:
168: do_cmd_pid = -1;
169:
170: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
171: return (-1);
172:
173: return (0);
174: }
175:
1.20 markus 176: /*
177: * This function executes the given command as the specified user on the
178: * given host. This returns < 0 if execution fails, and >= 0 otherwise. This
179: * assigns the input and output file descriptors on success.
180: */
1.1 deraadt 181:
1.27 markus 182: int
1.140 deraadt 183: do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout)
1.1 deraadt 184: {
1.18 markus 185: int pin[2], pout[2], reserved[2];
186:
187: if (verbose_mode)
1.78 deraadt 188: fprintf(stderr,
189: "Executing: program %s host %s, user %s, command %s\n",
190: ssh_program, host,
191: remuser ? remuser : "(unspecified)", cmd);
1.18 markus 192:
1.20 markus 193: /*
194: * Reserve two descriptors so that the real pipes won't get
195: * descriptors 0 and 1 because that will screw up dup2 below.
196: */
1.142 markus 197: if (pipe(reserved) < 0)
198: fatal("pipe: %s", strerror(errno));
1.18 markus 199:
200: /* Create a socket pair for communicating with ssh. */
201: if (pipe(pin) < 0)
202: fatal("pipe: %s", strerror(errno));
203: if (pipe(pout) < 0)
204: fatal("pipe: %s", strerror(errno));
205:
206: /* Free the reserved descriptors. */
207: close(reserved[0]);
208: close(reserved[1]);
209:
1.106 nino 210: /* Fork a child to execute the command on the remote host using ssh. */
1.92 markus 211: do_cmd_pid = fork();
212: if (do_cmd_pid == 0) {
1.18 markus 213: /* Child. */
214: close(pin[1]);
215: close(pout[0]);
216: dup2(pin[0], 0);
217: dup2(pout[1], 1);
218: close(pin[0]);
219: close(pout[1]);
220:
1.129 djm 221: replacearg(&args, 0, "%s", ssh_program);
1.41 markus 222: if (remuser != NULL)
1.70 mouring 223: addargs(&args, "-l%s", remuser);
224: addargs(&args, "%s", host);
225: addargs(&args, "%s", cmd);
1.18 markus 226:
1.41 markus 227: execvp(ssh_program, args.list);
1.34 deraadt 228: perror(ssh_program);
1.18 markus 229: exit(1);
1.92 markus 230: } else if (do_cmd_pid == -1) {
231: fatal("fork: %s", strerror(errno));
1.18 markus 232: }
233: /* Parent. Close the other side, and return the local side. */
234: close(pin[0]);
235: *fdout = pin[1];
236: close(pout[1]);
237: *fdin = pout[0];
1.105 djm 238: signal(SIGTERM, killchild);
239: signal(SIGINT, killchild);
240: signal(SIGHUP, killchild);
1.18 markus 241: return 0;
1.1 deraadt 242: }
243:
244: typedef struct {
1.124 djm 245: size_t cnt;
1.1 deraadt 246: char *buf;
247: } BUF;
248:
1.18 markus 249: BUF *allocbuf(BUF *, int, int);
250: void lostconn(int);
251: int okname(char *);
252: void run_err(const char *,...);
253: void verifydir(char *);
1.1 deraadt 254:
255: struct passwd *pwd;
1.18 markus 256: uid_t userid;
1.1 deraadt 257: int errs, remin, remout;
258: int pflag, iamremote, iamrecursive, targetshouldbedirectory;
259:
260: #define CMDNEEDS 64
261: char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
262:
1.18 markus 263: int response(void);
264: void rsource(char *, struct stat *);
265: void sink(int, char *[]);
266: void source(int, char *[]);
267: void tolocal(int, char *[]);
268: void toremote(char *, int, char *[]);
269: void usage(void);
1.1 deraadt 270:
271: int
1.104 djm 272: main(int argc, char **argv)
1.1 deraadt 273: {
1.145 djm 274: int ch, fflag, tflag, status, n;
1.99 markus 275: double speed;
1.145 djm 276: char *targ, *endp, **newargv;
1.1 deraadt 277: extern char *optarg;
278: extern int optind;
1.126 djm 279:
280: /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
281: sanitise_stdfd();
1.145 djm 282:
283: /* Copy argv, because we modify it */
284: newargv = xcalloc(MAX(argc + 1, 1), sizeof(*newargv));
285: for (n = 0; n < argc; n++)
286: newargv[n] = xstrdup(argv[n]);
287: argv = newargv;
1.1 deraadt 288:
1.129 djm 289: memset(&args, '\0', sizeof(args));
1.41 markus 290: args.list = NULL;
1.129 djm 291: addargs(&args, "%s", ssh_program);
1.70 mouring 292: addargs(&args, "-x");
1.82 stevesk 293: addargs(&args, "-oForwardAgent no");
1.128 reyk 294: addargs(&args, "-oPermitLocalCommand no");
1.84 stevesk 295: addargs(&args, "-oClearAllForwardings yes");
1.41 markus 296:
1.1 deraadt 297: fflag = tflag = 0;
1.100 markus 298: while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q1246S:o:F:")) != -1)
1.18 markus 299: switch (ch) {
300: /* User-visible flags. */
1.100 markus 301: case '1':
302: case '2':
1.23 markus 303: case '4':
1.41 markus 304: case '6':
305: case 'C':
1.70 mouring 306: addargs(&args, "-%c", ch);
1.41 markus 307: break;
308: case 'o':
309: case 'c':
310: case 'i':
1.83 stevesk 311: case 'F':
1.70 mouring 312: addargs(&args, "-%c%s", ch, optarg);
1.23 markus 313: break;
1.41 markus 314: case 'P':
1.70 mouring 315: addargs(&args, "-p%s", optarg);
1.41 markus 316: break;
317: case 'B':
1.70 mouring 318: addargs(&args, "-oBatchmode yes");
1.23 markus 319: break;
1.99 markus 320: case 'l':
321: speed = strtod(optarg, &endp);
322: if (speed <= 0 || *endp != '\0')
323: usage();
1.113 djm 324: limit_rate = speed * 1024;
1.99 markus 325: break;
1.1 deraadt 326: case 'p':
327: pflag = 1;
328: break;
329: case 'r':
330: iamrecursive = 1;
331: break;
1.34 deraadt 332: case 'S':
1.41 markus 333: ssh_program = xstrdup(optarg);
334: break;
335: case 'v':
1.72 markus 336: addargs(&args, "-v");
1.41 markus 337: verbose_mode = 1;
338: break;
339: case 'q':
1.111 dtucker 340: addargs(&args, "-q");
1.41 markus 341: showprogress = 0;
1.34 deraadt 342: break;
343:
1.18 markus 344: /* Server options. */
1.1 deraadt 345: case 'd':
346: targetshouldbedirectory = 1;
347: break;
1.18 markus 348: case 'f': /* "from" */
1.1 deraadt 349: iamremote = 1;
350: fflag = 1;
351: break;
1.18 markus 352: case 't': /* "to" */
1.1 deraadt 353: iamremote = 1;
354: tflag = 1;
355: break;
356: default:
357: usage();
358: }
359: argc -= optind;
360: argv += optind;
361:
362: if ((pwd = getpwuid(userid = getuid())) == NULL)
1.108 deraadt 363: fatal("unknown user %u", (u_int) userid);
1.1 deraadt 364:
1.18 markus 365: if (!isatty(STDERR_FILENO))
1.7 deraadt 366: showprogress = 0;
367:
1.1 deraadt 368: remin = STDIN_FILENO;
369: remout = STDOUT_FILENO;
370:
1.52 stevesk 371: if (fflag) {
1.18 markus 372: /* Follow "protocol", send data. */
373: (void) response();
1.1 deraadt 374: source(argc, argv);
375: exit(errs != 0);
376: }
1.18 markus 377: if (tflag) {
378: /* Receive data. */
1.1 deraadt 379: sink(argc, argv);
380: exit(errs != 0);
381: }
382: if (argc < 2)
383: usage();
384: if (argc > 2)
385: targetshouldbedirectory = 1;
386:
387: remin = remout = -1;
1.92 markus 388: do_cmd_pid = -1;
1.1 deraadt 389: /* Command to be executed on remote system using "ssh". */
1.55 deraadt 390: (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
391: verbose_mode ? " -v" : "",
1.35 deraadt 392: iamrecursive ? " -r" : "", pflag ? " -p" : "",
393: targetshouldbedirectory ? " -d" : "");
1.1 deraadt 394:
1.18 markus 395: (void) signal(SIGPIPE, lostconn);
1.1 deraadt 396:
397: if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */
398: toremote(targ, argc, argv);
399: else {
400: if (targetshouldbedirectory)
401: verifydir(argv[argc - 1]);
1.130 djm 402: tolocal(argc, argv); /* Dest is local host. */
1.92 markus 403: }
404: /*
405: * Finally check the exit status of the ssh process, if one was forked
406: * and no error has occured yet
407: */
408: if (do_cmd_pid != -1 && errs == 0) {
409: if (remin != -1)
410: (void) close(remin);
411: if (remout != -1)
412: (void) close(remout);
413: if (waitpid(do_cmd_pid, &status, 0) == -1)
414: errs = 1;
415: else {
416: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
417: errs = 1;
418: }
1.1 deraadt 419: }
420: exit(errs != 0);
421: }
422:
423: void
1.104 djm 424: toremote(char *targ, int argc, char **argv)
1.1 deraadt 425: {
1.120 deraadt 426: char *bp, *host, *src, *suser, *thost, *tuser, *arg;
1.129 djm 427: arglist alist;
1.140 deraadt 428: int i;
1.129 djm 429:
430: memset(&alist, '\0', sizeof(alist));
431: alist.list = NULL;
1.1 deraadt 432:
433: *targ++ = 0;
434: if (*targ == 0)
435: targ = ".";
436:
1.121 djm 437: arg = xstrdup(argv[argc - 1]);
1.120 deraadt 438: if ((thost = strrchr(arg, '@'))) {
1.1 deraadt 439: /* user@host */
440: *thost++ = 0;
1.120 deraadt 441: tuser = arg;
1.1 deraadt 442: if (*tuser == '\0')
443: tuser = NULL;
444: } else {
1.120 deraadt 445: thost = arg;
1.1 deraadt 446: tuser = NULL;
447: }
448:
1.129 djm 449: if (tuser != NULL && !okname(tuser)) {
450: xfree(arg);
451: return;
452: }
453:
1.1 deraadt 454: for (i = 0; i < argc - 1; i++) {
455: src = colon(argv[i]);
1.18 markus 456: if (src) { /* remote to remote */
1.129 djm 457: freeargs(&alist);
458: addargs(&alist, "%s", ssh_program);
459: if (verbose_mode)
460: addargs(&alist, "-v");
461: addargs(&alist, "-x");
462: addargs(&alist, "-oClearAllForwardings yes");
463: addargs(&alist, "-n");
464:
1.1 deraadt 465: *src++ = 0;
466: if (*src == 0)
467: src = ".";
1.94 markus 468: host = strrchr(argv[i], '@');
1.129 djm 469:
1.1 deraadt 470: if (host) {
471: *host++ = 0;
1.23 markus 472: host = cleanhostname(host);
1.1 deraadt 473: suser = argv[i];
474: if (*suser == '\0')
475: suser = pwd->pw_name;
1.129 djm 476: else if (!okname(suser))
1.101 markus 477: continue;
1.129 djm 478: addargs(&alist, "-l");
479: addargs(&alist, "%s", suser);
1.23 markus 480: } else {
481: host = cleanhostname(argv[i]);
482: }
1.129 djm 483: addargs(&alist, "%s", host);
484: addargs(&alist, "%s", cmd);
485: addargs(&alist, "%s", src);
486: addargs(&alist, "%s%s%s:%s",
487: tuser ? tuser : "", tuser ? "@" : "",
488: thost, targ);
489: if (do_local_cmd(&alist) != 0)
1.109 markus 490: errs = 1;
1.18 markus 491: } else { /* local to remote */
1.1 deraadt 492: if (remin == -1) {
1.141 djm 493: xasprintf(&bp, "%s -t %s", cmd, targ);
1.23 markus 494: host = cleanhostname(thost);
1.35 deraadt 495: if (do_cmd(host, tuser, bp, &remin,
1.140 deraadt 496: &remout) < 0)
1.18 markus 497: exit(1);
1.1 deraadt 498: if (response() < 0)
499: exit(1);
1.18 markus 500: (void) xfree(bp);
1.1 deraadt 501: }
1.18 markus 502: source(1, argv + i);
1.1 deraadt 503: }
504: }
1.142 markus 505: xfree(arg);
1.1 deraadt 506: }
507:
508: void
1.104 djm 509: tolocal(int argc, char **argv)
1.1 deraadt 510: {
511: char *bp, *host, *src, *suser;
1.129 djm 512: arglist alist;
1.140 deraadt 513: int i;
1.129 djm 514:
515: memset(&alist, '\0', sizeof(alist));
516: alist.list = NULL;
1.1 deraadt 517:
518: for (i = 0; i < argc - 1; i++) {
1.18 markus 519: if (!(src = colon(argv[i]))) { /* Local to local. */
1.129 djm 520: freeargs(&alist);
521: addargs(&alist, "%s", _PATH_CP);
522: if (iamrecursive)
523: addargs(&alist, "-r");
524: if (pflag)
525: addargs(&alist, "-p");
526: addargs(&alist, "%s", argv[i]);
527: addargs(&alist, "%s", argv[argc-1]);
528: if (do_local_cmd(&alist))
1.1 deraadt 529: ++errs;
530: continue;
531: }
532: *src++ = 0;
533: if (*src == 0)
534: src = ".";
1.94 markus 535: if ((host = strrchr(argv[i], '@')) == NULL) {
1.1 deraadt 536: host = argv[i];
537: suser = NULL;
538: } else {
539: *host++ = 0;
540: suser = argv[i];
541: if (*suser == '\0')
542: suser = pwd->pw_name;
543: }
1.23 markus 544: host = cleanhostname(host);
1.141 djm 545: xasprintf(&bp, "%s -f %s", cmd, src);
1.140 deraadt 546: if (do_cmd(host, suser, bp, &remin, &remout) < 0) {
1.18 markus 547: (void) xfree(bp);
548: ++errs;
549: continue;
1.1 deraadt 550: }
1.18 markus 551: xfree(bp);
1.1 deraadt 552: sink(1, argv + argc - 1);
1.18 markus 553: (void) close(remin);
1.1 deraadt 554: remin = remout = -1;
555: }
556: }
557:
558: void
1.104 djm 559: source(int argc, char **argv)
1.1 deraadt 560: {
561: struct stat stb;
562: static BUF buffer;
563: BUF *bp;
1.122 avsm 564: off_t i, amt, statbytes;
565: size_t result;
1.125 dtucker 566: int fd = -1, haderr, indx;
1.1 deraadt 567: char *last, *name, buf[2048];
1.65 deraadt 568: int len;
1.1 deraadt 569:
570: for (indx = 0; indx < argc; ++indx) {
1.18 markus 571: name = argv[indx];
1.11 aaron 572: statbytes = 0;
1.65 deraadt 573: len = strlen(name);
574: while (len > 1 && name[len-1] == '/')
575: name[--len] = '\0';
1.85 markus 576: if (strchr(name, '\n') != NULL) {
577: run_err("%s: skipping, filename contains a newline",
578: name);
579: goto next;
580: }
1.1 deraadt 581: if ((fd = open(name, O_RDONLY, 0)) < 0)
582: goto syserr;
583: if (fstat(fd, &stb) < 0) {
584: syserr: run_err("%s: %s", name, strerror(errno));
585: goto next;
586: }
587: switch (stb.st_mode & S_IFMT) {
588: case S_IFREG:
589: break;
590: case S_IFDIR:
591: if (iamrecursive) {
592: rsource(name, &stb);
593: goto next;
594: }
595: /* FALLTHROUGH */
596: default:
597: run_err("%s: not a regular file", name);
598: goto next;
599: }
600: if ((last = strrchr(name, '/')) == NULL)
601: last = name;
602: else
603: ++last;
1.11 aaron 604: curfile = last;
1.1 deraadt 605: if (pflag) {
606: /*
607: * Make it compatible with possible future
608: * versions expecting microseconds.
609: */
1.55 deraadt 610: (void) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n",
1.47 markus 611: (u_long) stb.st_mtime,
612: (u_long) stb.st_atime);
1.107 deraadt 613: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 614: if (response() < 0)
615: goto next;
616: }
617: #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
1.61 markus 618: snprintf(buf, sizeof buf, "C%04o %lld %s\n",
1.47 markus 619: (u_int) (stb.st_mode & FILEMODEMASK),
1.62 markus 620: (long long)stb.st_size, last);
1.18 markus 621: if (verbose_mode) {
622: fprintf(stderr, "Sending file modes: %s", buf);
623: }
1.107 deraadt 624: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 625: if (response() < 0)
626: goto next;
627: if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) {
1.127 deraadt 628: next: if (fd != -1) {
629: (void) close(fd);
630: fd = -1;
631: }
1.1 deraadt 632: continue;
633: }
1.97 fgsch 634: if (showprogress)
635: start_progress_meter(curfile, stb.st_size, &statbytes);
1.1 deraadt 636: /* Keep writing after an error so that we stay sync'd up. */
637: for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
638: amt = bp->cnt;
639: if (i + amt > stb.st_size)
640: amt = stb.st_size - i;
641: if (!haderr) {
1.30 deraadt 642: result = atomicio(read, fd, bp->buf, amt);
1.1 deraadt 643: if (result != amt)
1.122 avsm 644: haderr = errno;
1.1 deraadt 645: }
646: if (haderr)
1.107 deraadt 647: (void) atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 648: else {
1.107 deraadt 649: result = atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 650: if (result != amt)
1.122 avsm 651: haderr = errno;
1.4 aaron 652: statbytes += result;
1.1 deraadt 653: }
1.113 djm 654: if (limit_rate)
1.99 markus 655: bwlimit(amt);
1.1 deraadt 656: }
1.18 markus 657: if (showprogress)
1.97 fgsch 658: stop_progress_meter();
1.4 aaron 659:
1.127 deraadt 660: if (fd != -1) {
661: if (close(fd) < 0 && !haderr)
662: haderr = errno;
663: fd = -1;
664: }
1.1 deraadt 665: if (!haderr)
1.107 deraadt 666: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 667: else
668: run_err("%s: %s", name, strerror(haderr));
1.18 markus 669: (void) response();
1.1 deraadt 670: }
671: }
672:
673: void
1.104 djm 674: rsource(char *name, struct stat *statp)
1.1 deraadt 675: {
676: DIR *dirp;
677: struct dirent *dp;
678: char *last, *vect[1], path[1100];
679:
680: if (!(dirp = opendir(name))) {
681: run_err("%s: %s", name, strerror(errno));
682: return;
683: }
684: last = strrchr(name, '/');
685: if (last == 0)
686: last = name;
687: else
688: last++;
689: if (pflag) {
1.55 deraadt 690: (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n",
1.47 markus 691: (u_long) statp->st_mtime,
692: (u_long) statp->st_atime);
1.107 deraadt 693: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 694: if (response() < 0) {
695: closedir(dirp);
696: return;
697: }
698: }
1.55 deraadt 699: (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n",
1.47 markus 700: (u_int) (statp->st_mode & FILEMODEMASK), 0, last);
1.18 markus 701: if (verbose_mode)
702: fprintf(stderr, "Entering directory: %s", path);
1.107 deraadt 703: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 704: if (response() < 0) {
705: closedir(dirp);
706: return;
707: }
1.63 stevesk 708: while ((dp = readdir(dirp)) != NULL) {
1.1 deraadt 709: if (dp->d_ino == 0)
710: continue;
711: if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
712: continue;
713: if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) {
714: run_err("%s/%s: name too long", name, dp->d_name);
715: continue;
716: }
1.55 deraadt 717: (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name);
1.1 deraadt 718: vect[0] = path;
719: source(1, vect);
720: }
1.18 markus 721: (void) closedir(dirp);
1.107 deraadt 722: (void) atomicio(vwrite, remout, "E\n", 2);
1.18 markus 723: (void) response();
1.1 deraadt 724: }
725:
726: void
1.99 markus 727: bwlimit(int amount)
728: {
729: static struct timeval bwstart, bwend;
730: static int lamt, thresh = 16384;
1.115 avsm 731: u_int64_t waitlen;
1.99 markus 732: struct timespec ts, rm;
733:
734: if (!timerisset(&bwstart)) {
735: gettimeofday(&bwstart, NULL);
736: return;
737: }
738:
739: lamt += amount;
740: if (lamt < thresh)
741: return;
742:
743: gettimeofday(&bwend, NULL);
744: timersub(&bwend, &bwstart, &bwend);
745: if (!timerisset(&bwend))
746: return;
747:
748: lamt *= 8;
1.115 avsm 749: waitlen = (double)1000000L * lamt / limit_rate;
1.99 markus 750:
1.115 avsm 751: bwstart.tv_sec = waitlen / 1000000L;
752: bwstart.tv_usec = waitlen % 1000000L;
1.99 markus 753:
754: if (timercmp(&bwstart, &bwend, >)) {
755: timersub(&bwstart, &bwend, &bwend);
756:
757: /* Adjust the wait time */
758: if (bwend.tv_sec) {
759: thresh /= 2;
760: if (thresh < 2048)
761: thresh = 2048;
762: } else if (bwend.tv_usec < 100) {
763: thresh *= 2;
764: if (thresh > 32768)
765: thresh = 32768;
766: }
767:
768: TIMEVAL_TO_TIMESPEC(&bwend, &ts);
769: while (nanosleep(&ts, &rm) == -1) {
770: if (errno != EINTR)
771: break;
772: ts = rm;
773: }
774: }
775:
776: lamt = 0;
777: gettimeofday(&bwstart, NULL);
778: }
779:
780: void
1.104 djm 781: sink(int argc, char **argv)
1.1 deraadt 782: {
783: static BUF buffer;
784: struct stat stb;
1.18 markus 785: enum {
786: YES, NO, DISPLAYED
787: } wrerr;
1.1 deraadt 788: BUF *bp;
1.122 avsm 789: off_t i;
1.124 djm 790: size_t j, count;
1.140 deraadt 791: int amt, exists, first, ofd;
792: mode_t mode, omode, mask;
1.97 fgsch 793: off_t size, statbytes;
1.36 deraadt 794: int setimes, targisdir, wrerrno = 0;
1.1 deraadt 795: char ch, *cp, *np, *targ, *why, *vect[1], buf[2048];
1.40 markus 796: struct timeval tv[2];
1.1 deraadt 797:
1.66 stevesk 798: #define atime tv[0]
799: #define mtime tv[1]
1.118 deraadt 800: #define SCREWUP(str) { why = str; goto screwup; }
1.1 deraadt 801:
802: setimes = targisdir = 0;
803: mask = umask(0);
804: if (!pflag)
1.18 markus 805: (void) umask(mask);
1.1 deraadt 806: if (argc != 1) {
807: run_err("ambiguous target");
808: exit(1);
809: }
810: targ = *argv;
811: if (targetshouldbedirectory)
812: verifydir(targ);
1.18 markus 813:
1.107 deraadt 814: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 815: if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
816: targisdir = 1;
817: for (first = 1;; first = 0) {
818: cp = buf;
1.122 avsm 819: if (atomicio(read, remin, cp, 1) != 1)
1.1 deraadt 820: return;
821: if (*cp++ == '\n')
822: SCREWUP("unexpected <newline>");
823: do {
1.30 deraadt 824: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 825: SCREWUP("lost connection");
826: *cp++ = ch;
827: } while (cp < &buf[sizeof(buf) - 1] && ch != '\n');
828: *cp = 0;
1.114 markus 829: if (verbose_mode)
830: fprintf(stderr, "Sink: %s", buf);
1.1 deraadt 831:
832: if (buf[0] == '\01' || buf[0] == '\02') {
833: if (iamremote == 0)
1.107 deraadt 834: (void) atomicio(vwrite, STDERR_FILENO,
1.44 deraadt 835: buf + 1, strlen(buf + 1));
1.1 deraadt 836: if (buf[0] == '\02')
837: exit(1);
838: ++errs;
839: continue;
840: }
841: if (buf[0] == 'E') {
1.107 deraadt 842: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 843: return;
844: }
845: if (ch == '\n')
846: *--cp = 0;
847:
848: cp = buf;
849: if (*cp == 'T') {
850: setimes++;
851: cp++;
1.66 stevesk 852: mtime.tv_sec = strtol(cp, &cp, 10);
853: if (!cp || *cp++ != ' ')
1.1 deraadt 854: SCREWUP("mtime.sec not delimited");
1.66 stevesk 855: mtime.tv_usec = strtol(cp, &cp, 10);
856: if (!cp || *cp++ != ' ')
1.1 deraadt 857: SCREWUP("mtime.usec not delimited");
1.66 stevesk 858: atime.tv_sec = strtol(cp, &cp, 10);
859: if (!cp || *cp++ != ' ')
1.1 deraadt 860: SCREWUP("atime.sec not delimited");
1.66 stevesk 861: atime.tv_usec = strtol(cp, &cp, 10);
862: if (!cp || *cp++ != '\0')
1.1 deraadt 863: SCREWUP("atime.usec not delimited");
1.107 deraadt 864: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 865: continue;
866: }
867: if (*cp != 'C' && *cp != 'D') {
868: /*
869: * Check for the case "rcp remote:foo\* local:bar".
870: * In this case, the line "No match." can be returned
871: * by the shell before the rcp command on the remote is
872: * executed so the ^Aerror_message convention isn't
873: * followed.
874: */
875: if (first) {
876: run_err("%s", cp);
877: exit(1);
878: }
879: SCREWUP("expected control record");
880: }
881: mode = 0;
882: for (++cp; cp < buf + 5; cp++) {
883: if (*cp < '0' || *cp > '7')
884: SCREWUP("bad mode");
885: mode = (mode << 3) | (*cp - '0');
886: }
887: if (*cp++ != ' ')
888: SCREWUP("mode not delimited");
889:
1.63 stevesk 890: for (size = 0; isdigit(*cp);)
1.1 deraadt 891: size = size * 10 + (*cp++ - '0');
892: if (*cp++ != ' ')
893: SCREWUP("size not delimited");
1.114 markus 894: if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) {
895: run_err("error: unexpected filename: %s", cp);
896: exit(1);
897: }
1.1 deraadt 898: if (targisdir) {
899: static char *namebuf;
1.124 djm 900: static size_t cursize;
1.1 deraadt 901: size_t need;
902:
903: need = strlen(targ) + strlen(cp) + 250;
1.55 deraadt 904: if (need > cursize) {
1.58 danh 905: if (namebuf)
906: xfree(namebuf);
1.18 markus 907: namebuf = xmalloc(need);
1.55 deraadt 908: cursize = need;
909: }
910: (void) snprintf(namebuf, need, "%s%s%s", targ,
1.88 mouring 911: strcmp(targ, "/") ? "/" : "", cp);
1.1 deraadt 912: np = namebuf;
913: } else
914: np = targ;
1.12 aaron 915: curfile = cp;
1.1 deraadt 916: exists = stat(np, &stb) == 0;
917: if (buf[0] == 'D') {
918: int mod_flag = pflag;
1.114 markus 919: if (!iamrecursive)
920: SCREWUP("received directory without -r");
1.1 deraadt 921: if (exists) {
922: if (!S_ISDIR(stb.st_mode)) {
923: errno = ENOTDIR;
924: goto bad;
925: }
926: if (pflag)
1.18 markus 927: (void) chmod(np, mode);
1.1 deraadt 928: } else {
1.18 markus 929: /* Handle copying from a read-only
930: directory */
1.1 deraadt 931: mod_flag = 1;
932: if (mkdir(np, mode | S_IRWXU) < 0)
933: goto bad;
934: }
1.58 danh 935: vect[0] = xstrdup(np);
1.1 deraadt 936: sink(1, vect);
937: if (setimes) {
938: setimes = 0;
1.59 deraadt 939: if (utimes(vect[0], tv) < 0)
1.18 markus 940: run_err("%s: set times: %s",
1.59 deraadt 941: vect[0], strerror(errno));
1.1 deraadt 942: }
943: if (mod_flag)
1.59 deraadt 944: (void) chmod(vect[0], mode);
945: if (vect[0])
946: xfree(vect[0]);
1.1 deraadt 947: continue;
948: }
949: omode = mode;
950: mode |= S_IWRITE;
1.71 markus 951: if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
1.1 deraadt 952: bad: run_err("%s: %s", np, strerror(errno));
953: continue;
954: }
1.107 deraadt 955: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 956: if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) {
1.18 markus 957: (void) close(ofd);
1.1 deraadt 958: continue;
959: }
960: cp = bp->buf;
961: wrerr = NO;
1.7 deraadt 962:
1.12 aaron 963: statbytes = 0;
1.97 fgsch 964: if (showprogress)
965: start_progress_meter(curfile, size, &statbytes);
1.1 deraadt 966: for (count = i = 0; i < size; i += 4096) {
967: amt = 4096;
968: if (i + amt > size)
969: amt = size - i;
970: count += amt;
971: do {
1.117 avsm 972: j = atomicio(read, remin, cp, amt);
1.122 avsm 973: if (j == 0) {
1.1 deraadt 974: run_err("%s", j ? strerror(errno) :
1.63 stevesk 975: "dropped connection");
1.1 deraadt 976: exit(1);
977: }
978: amt -= j;
979: cp += j;
1.18 markus 980: statbytes += j;
1.1 deraadt 981: } while (amt > 0);
1.112 djm 982:
1.113 djm 983: if (limit_rate)
1.99 markus 984: bwlimit(4096);
985:
1.1 deraadt 986: if (count == bp->cnt) {
987: /* Keep reading so we stay sync'd up. */
988: if (wrerr == NO) {
1.122 avsm 989: if (atomicio(vwrite, ofd, bp->buf,
990: count) != count) {
1.1 deraadt 991: wrerr = YES;
1.122 avsm 992: wrerrno = errno;
1.1 deraadt 993: }
994: }
995: count = 0;
996: cp = bp->buf;
997: }
998: }
1.7 deraadt 999: if (showprogress)
1.97 fgsch 1000: stop_progress_meter();
1.1 deraadt 1001: if (count != 0 && wrerr == NO &&
1.122 avsm 1002: atomicio(vwrite, ofd, bp->buf, count) != count) {
1.1 deraadt 1003: wrerr = YES;
1.122 avsm 1004: wrerrno = errno;
1.1 deraadt 1005: }
1.98 djm 1006: if (wrerr == NO && ftruncate(ofd, size) != 0) {
1.1 deraadt 1007: run_err("%s: truncate: %s", np, strerror(errno));
1008: wrerr = DISPLAYED;
1009: }
1010: if (pflag) {
1011: if (exists || omode != mode)
1.116 dtucker 1012: if (fchmod(ofd, omode)) {
1.1 deraadt 1013: run_err("%s: set mode: %s",
1.63 stevesk 1014: np, strerror(errno));
1.116 dtucker 1015: wrerr = DISPLAYED;
1016: }
1.1 deraadt 1017: } else {
1018: if (!exists && omode != mode)
1.116 dtucker 1019: if (fchmod(ofd, omode & ~mask)) {
1.1 deraadt 1020: run_err("%s: set mode: %s",
1.63 stevesk 1021: np, strerror(errno));
1.116 dtucker 1022: wrerr = DISPLAYED;
1023: }
1.1 deraadt 1024: }
1.33 provos 1025: if (close(ofd) == -1) {
1026: wrerr = YES;
1027: wrerrno = errno;
1028: }
1.18 markus 1029: (void) response();
1.1 deraadt 1030: if (setimes && wrerr == NO) {
1031: setimes = 0;
1.40 markus 1032: if (utimes(np, tv) < 0) {
1.1 deraadt 1033: run_err("%s: set times: %s",
1.63 stevesk 1034: np, strerror(errno));
1.1 deraadt 1035: wrerr = DISPLAYED;
1036: }
1037: }
1.18 markus 1038: switch (wrerr) {
1.1 deraadt 1039: case YES:
1040: run_err("%s: %s", np, strerror(wrerrno));
1041: break;
1042: case NO:
1.107 deraadt 1043: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 1044: break;
1045: case DISPLAYED:
1046: break;
1047: }
1048: }
1049: screwup:
1050: run_err("protocol error: %s", why);
1051: exit(1);
1052: }
1053:
1054: int
1.86 itojun 1055: response(void)
1.1 deraadt 1056: {
1057: char ch, *cp, resp, rbuf[2048];
1058:
1.30 deraadt 1059: if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp))
1.1 deraadt 1060: lostconn(0);
1061:
1062: cp = rbuf;
1.18 markus 1063: switch (resp) {
1064: case 0: /* ok */
1.1 deraadt 1065: return (0);
1066: default:
1067: *cp++ = resp;
1068: /* FALLTHROUGH */
1.18 markus 1069: case 1: /* error, followed by error msg */
1070: case 2: /* fatal error, "" */
1.1 deraadt 1071: do {
1.30 deraadt 1072: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 1073: lostconn(0);
1074: *cp++ = ch;
1075: } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
1076:
1077: if (!iamremote)
1.107 deraadt 1078: (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf);
1.1 deraadt 1079: ++errs;
1080: if (resp == 1)
1081: return (-1);
1082: exit(1);
1083: }
1084: /* NOTREACHED */
1085: }
1086:
1087: void
1.86 itojun 1088: usage(void)
1.1 deraadt 1089: {
1.83 stevesk 1090: (void) fprintf(stderr,
1.110 jmc 1091: "usage: scp [-1246BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n"
1092: " [-l limit] [-o ssh_option] [-P port] [-S program]\n"
1.90 deraadt 1093: " [[user@]host1:]file1 [...] [[user@]host2:]file2\n");
1.1 deraadt 1094: exit(1);
1095: }
1096:
1097: void
1.18 markus 1098: run_err(const char *fmt,...)
1.1 deraadt 1099: {
1100: static FILE *fp;
1101: va_list ap;
1102:
1103: ++errs;
1.136 biorn 1104: if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) {
1105: (void) fprintf(fp, "%c", 0x01);
1106: (void) fprintf(fp, "scp: ");
1107: va_start(ap, fmt);
1108: (void) vfprintf(fp, fmt, ap);
1109: va_end(ap);
1110: (void) fprintf(fp, "\n");
1111: (void) fflush(fp);
1112: }
1.18 markus 1113:
1114: if (!iamremote) {
1.73 markus 1115: va_start(ap, fmt);
1.18 markus 1116: vfprintf(stderr, fmt, ap);
1.73 markus 1117: va_end(ap);
1.18 markus 1118: fprintf(stderr, "\n");
1119: }
1.1 deraadt 1120: }
1121:
1122: void
1.104 djm 1123: verifydir(char *cp)
1.1 deraadt 1124: {
1125: struct stat stb;
1126:
1127: if (!stat(cp, &stb)) {
1128: if (S_ISDIR(stb.st_mode))
1129: return;
1130: errno = ENOTDIR;
1131: }
1132: run_err("%s: %s", cp, strerror(errno));
1.123 avsm 1133: killchild(0);
1.1 deraadt 1134: }
1135:
1136: int
1.104 djm 1137: okname(char *cp0)
1.1 deraadt 1138: {
1139: int c;
1140: char *cp;
1141:
1142: cp = cp0;
1143: do {
1.75 deraadt 1144: c = (int)*cp;
1.1 deraadt 1145: if (c & 0200)
1146: goto bad;
1.101 markus 1147: if (!isalpha(c) && !isdigit(c)) {
1148: switch (c) {
1149: case '\'':
1150: case '"':
1151: case '`':
1152: case ' ':
1153: case '#':
1154: goto bad;
1155: default:
1156: break;
1157: }
1158: }
1.1 deraadt 1159: } while (*++cp);
1160: return (1);
1161:
1.25 markus 1162: bad: fprintf(stderr, "%s: invalid user name\n", cp0);
1.1 deraadt 1163: return (0);
1164: }
1165:
1166: BUF *
1.104 djm 1167: allocbuf(BUF *bp, int fd, int blksize)
1.1 deraadt 1168: {
1169: size_t size;
1170: struct stat stb;
1171:
1172: if (fstat(fd, &stb) < 0) {
1173: run_err("fstat: %s", strerror(errno));
1174: return (0);
1175: }
1.95 markus 1176: size = roundup(stb.st_blksize, blksize);
1177: if (size == 0)
1.18 markus 1178: size = blksize;
1.1 deraadt 1179: if (bp->cnt >= size)
1180: return (bp);
1.18 markus 1181: if (bp->buf == NULL)
1182: bp->buf = xmalloc(size);
1183: else
1.138 djm 1184: bp->buf = xrealloc(bp->buf, 1, size);
1.81 markus 1185: memset(bp->buf, 0, size);
1.1 deraadt 1186: bp->cnt = size;
1187: return (bp);
1188: }
1189:
1190: void
1.104 djm 1191: lostconn(int signo)
1.1 deraadt 1192: {
1193: if (!iamremote)
1.74 markus 1194: write(STDERR_FILENO, "lost connection\n", 16);
1195: if (signo)
1196: _exit(1);
1197: else
1198: exit(1);
1.4 aaron 1199: }
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