Annotation of src/usr.bin/ssh/scp.c, Revision 1.108
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"
1.108 ! deraadt 74: RCSID("$OpenBSD: scp.c,v 1.107 2003/06/28 16:23:06 deraadt Exp $");
1.1 deraadt 75:
76: #include "xmalloc.h"
1.51 markus 77: #include "atomicio.h"
1.50 markus 78: #include "pathnames.h"
1.51 markus 79: #include "log.h"
1.69 mouring 80: #include "misc.h"
1.97 fgsch 81: #include "progressmeter.h"
1.1 deraadt 82:
1.35 deraadt 83: int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout, int argc);
1.11 aaron 84:
1.99 markus 85: void bwlimit(int);
86:
1.70 mouring 87: /* Struct for addargs */
88: arglist args;
1.41 markus 89:
1.99 markus 90: /* Bandwidth limit */
91: off_t limit = 0;
92:
1.11 aaron 93: /* Name of current file being transferred. */
94: char *curfile;
1.4 aaron 95:
1.1 deraadt 96: /* This is set to non-zero to enable verbose mode. */
1.17 markus 97: int verbose_mode = 0;
1.1 deraadt 98:
1.6 aaron 99: /* This is set to zero if the progressmeter is not desired. */
100: int showprogress = 1;
101:
1.34 deraadt 102: /* This is the program to execute for the secured connection. ("ssh" or -S) */
1.50 markus 103: char *ssh_program = _PATH_SSH_PROGRAM;
1.34 deraadt 104:
1.92 markus 105: /* This is used to store the pid of ssh_program */
1.105 djm 106: pid_t do_cmd_pid = -1;
107:
108: static void
109: killchild(int signo)
110: {
111: if (do_cmd_pid > 1)
112: kill(do_cmd_pid, signo);
113:
114: _exit(1);
115: }
1.92 markus 116:
1.20 markus 117: /*
118: * This function executes the given command as the specified user on the
119: * given host. This returns < 0 if execution fails, and >= 0 otherwise. This
120: * assigns the input and output file descriptors on success.
121: */
1.1 deraadt 122:
1.27 markus 123: int
1.35 deraadt 124: do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout, int argc)
1.1 deraadt 125: {
1.18 markus 126: int pin[2], pout[2], reserved[2];
127:
128: if (verbose_mode)
1.78 deraadt 129: fprintf(stderr,
130: "Executing: program %s host %s, user %s, command %s\n",
131: ssh_program, host,
132: remuser ? remuser : "(unspecified)", cmd);
1.18 markus 133:
1.20 markus 134: /*
135: * Reserve two descriptors so that the real pipes won't get
136: * descriptors 0 and 1 because that will screw up dup2 below.
137: */
1.18 markus 138: pipe(reserved);
139:
140: /* Create a socket pair for communicating with ssh. */
141: if (pipe(pin) < 0)
142: fatal("pipe: %s", strerror(errno));
143: if (pipe(pout) < 0)
144: fatal("pipe: %s", strerror(errno));
145:
146: /* Free the reserved descriptors. */
147: close(reserved[0]);
148: close(reserved[1]);
149:
1.106 nino 150: /* Fork a child to execute the command on the remote host using ssh. */
1.92 markus 151: do_cmd_pid = fork();
152: if (do_cmd_pid == 0) {
1.18 markus 153: /* Child. */
154: close(pin[1]);
155: close(pout[0]);
156: dup2(pin[0], 0);
157: dup2(pout[1], 1);
158: close(pin[0]);
159: close(pout[1]);
160:
1.41 markus 161: args.list[0] = ssh_program;
162: if (remuser != NULL)
1.70 mouring 163: addargs(&args, "-l%s", remuser);
164: addargs(&args, "%s", host);
165: addargs(&args, "%s", cmd);
1.18 markus 166:
1.41 markus 167: execvp(ssh_program, args.list);
1.34 deraadt 168: perror(ssh_program);
1.18 markus 169: exit(1);
1.92 markus 170: } else if (do_cmd_pid == -1) {
171: fatal("fork: %s", strerror(errno));
1.18 markus 172: }
173: /* Parent. Close the other side, and return the local side. */
174: close(pin[0]);
175: *fdout = pin[1];
176: close(pout[1]);
177: *fdin = pout[0];
1.105 djm 178: signal(SIGTERM, killchild);
179: signal(SIGINT, killchild);
180: signal(SIGHUP, killchild);
1.18 markus 181: return 0;
1.1 deraadt 182: }
183:
184: typedef struct {
185: int cnt;
186: char *buf;
187: } BUF;
188:
1.18 markus 189: BUF *allocbuf(BUF *, int, int);
190: void lostconn(int);
191: void nospace(void);
192: int okname(char *);
193: void run_err(const char *,...);
194: void verifydir(char *);
1.1 deraadt 195:
196: struct passwd *pwd;
1.18 markus 197: uid_t userid;
1.1 deraadt 198: int errs, remin, remout;
199: int pflag, iamremote, iamrecursive, targetshouldbedirectory;
200:
201: #define CMDNEEDS 64
202: char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
203:
1.18 markus 204: int response(void);
205: void rsource(char *, struct stat *);
206: void sink(int, char *[]);
207: void source(int, char *[]);
208: void tolocal(int, char *[]);
209: void toremote(char *, int, char *[]);
210: void usage(void);
1.1 deraadt 211:
212: int
1.104 djm 213: main(int argc, char **argv)
1.1 deraadt 214: {
1.92 markus 215: int ch, fflag, tflag, status;
1.99 markus 216: double speed;
217: char *targ, *endp;
1.1 deraadt 218: extern char *optarg;
219: extern int optind;
220:
1.41 markus 221: args.list = NULL;
1.91 deraadt 222: addargs(&args, "ssh"); /* overwritten with ssh_program */
1.70 mouring 223: addargs(&args, "-x");
1.82 stevesk 224: addargs(&args, "-oForwardAgent no");
1.84 stevesk 225: addargs(&args, "-oClearAllForwardings yes");
1.41 markus 226:
1.1 deraadt 227: fflag = tflag = 0;
1.100 markus 228: while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q1246S:o:F:")) != -1)
1.18 markus 229: switch (ch) {
230: /* User-visible flags. */
1.100 markus 231: case '1':
232: case '2':
1.23 markus 233: case '4':
1.41 markus 234: case '6':
235: case 'C':
1.70 mouring 236: addargs(&args, "-%c", ch);
1.41 markus 237: break;
238: case 'o':
239: case 'c':
240: case 'i':
1.83 stevesk 241: case 'F':
1.70 mouring 242: addargs(&args, "-%c%s", ch, optarg);
1.23 markus 243: break;
1.41 markus 244: case 'P':
1.70 mouring 245: addargs(&args, "-p%s", optarg);
1.41 markus 246: break;
247: case 'B':
1.70 mouring 248: addargs(&args, "-oBatchmode yes");
1.23 markus 249: break;
1.99 markus 250: case 'l':
251: speed = strtod(optarg, &endp);
252: if (speed <= 0 || *endp != '\0')
253: usage();
254: limit = speed * 1024;
255: break;
1.1 deraadt 256: case 'p':
257: pflag = 1;
258: break;
259: case 'r':
260: iamrecursive = 1;
261: break;
1.34 deraadt 262: case 'S':
1.41 markus 263: ssh_program = xstrdup(optarg);
264: break;
265: case 'v':
1.72 markus 266: addargs(&args, "-v");
1.41 markus 267: verbose_mode = 1;
268: break;
269: case 'q':
270: showprogress = 0;
1.34 deraadt 271: break;
272:
1.18 markus 273: /* Server options. */
1.1 deraadt 274: case 'd':
275: targetshouldbedirectory = 1;
276: break;
1.18 markus 277: case 'f': /* "from" */
1.1 deraadt 278: iamremote = 1;
279: fflag = 1;
280: break;
1.18 markus 281: case 't': /* "to" */
1.1 deraadt 282: iamremote = 1;
283: tflag = 1;
284: break;
285: default:
286: usage();
287: }
288: argc -= optind;
289: argv += optind;
290:
291: if ((pwd = getpwuid(userid = getuid())) == NULL)
1.108 ! deraadt 292: fatal("unknown user %u", (u_int) userid);
1.1 deraadt 293:
1.18 markus 294: if (!isatty(STDERR_FILENO))
1.7 deraadt 295: showprogress = 0;
296:
1.1 deraadt 297: remin = STDIN_FILENO;
298: remout = STDOUT_FILENO;
299:
1.52 stevesk 300: if (fflag) {
1.18 markus 301: /* Follow "protocol", send data. */
302: (void) response();
1.1 deraadt 303: source(argc, argv);
304: exit(errs != 0);
305: }
1.18 markus 306: if (tflag) {
307: /* Receive data. */
1.1 deraadt 308: sink(argc, argv);
309: exit(errs != 0);
310: }
311: if (argc < 2)
312: usage();
313: if (argc > 2)
314: targetshouldbedirectory = 1;
315:
316: remin = remout = -1;
1.92 markus 317: do_cmd_pid = -1;
1.1 deraadt 318: /* Command to be executed on remote system using "ssh". */
1.55 deraadt 319: (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
320: verbose_mode ? " -v" : "",
1.35 deraadt 321: iamrecursive ? " -r" : "", pflag ? " -p" : "",
322: targetshouldbedirectory ? " -d" : "");
1.1 deraadt 323:
1.18 markus 324: (void) signal(SIGPIPE, lostconn);
1.1 deraadt 325:
326: if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */
327: toremote(targ, argc, argv);
328: else {
1.18 markus 329: tolocal(argc, argv); /* Dest is local host. */
1.1 deraadt 330: if (targetshouldbedirectory)
331: verifydir(argv[argc - 1]);
1.92 markus 332: }
333: /*
334: * Finally check the exit status of the ssh process, if one was forked
335: * and no error has occured yet
336: */
337: if (do_cmd_pid != -1 && errs == 0) {
338: if (remin != -1)
339: (void) close(remin);
340: if (remout != -1)
341: (void) close(remout);
342: if (waitpid(do_cmd_pid, &status, 0) == -1)
343: errs = 1;
344: else {
345: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
346: errs = 1;
347: }
1.1 deraadt 348: }
349: exit(errs != 0);
350: }
351:
352: void
1.104 djm 353: toremote(char *targ, int argc, char **argv)
1.1 deraadt 354: {
355: int i, len;
356: char *bp, *host, *src, *suser, *thost, *tuser;
357:
358: *targ++ = 0;
359: if (*targ == 0)
360: targ = ".";
361:
1.94 markus 362: if ((thost = strrchr(argv[argc - 1], '@'))) {
1.1 deraadt 363: /* user@host */
364: *thost++ = 0;
365: tuser = argv[argc - 1];
366: if (*tuser == '\0')
367: tuser = NULL;
368: } else {
369: thost = argv[argc - 1];
370: tuser = NULL;
371: }
372:
373: for (i = 0; i < argc - 1; i++) {
374: src = colon(argv[i]);
1.18 markus 375: if (src) { /* remote to remote */
1.84 stevesk 376: static char *ssh_options =
1.89 markus 377: "-x -o'ClearAllForwardings yes'";
1.1 deraadt 378: *src++ = 0;
379: if (*src == 0)
380: src = ".";
1.94 markus 381: host = strrchr(argv[i], '@');
1.34 deraadt 382: len = strlen(ssh_program) + strlen(argv[i]) +
1.35 deraadt 383: strlen(src) + (tuser ? strlen(tuser) : 0) +
1.84 stevesk 384: strlen(thost) + strlen(targ) +
385: strlen(ssh_options) + CMDNEEDS + 20;
1.18 markus 386: bp = xmalloc(len);
1.1 deraadt 387: if (host) {
388: *host++ = 0;
1.23 markus 389: host = cleanhostname(host);
1.1 deraadt 390: suser = argv[i];
391: if (*suser == '\0')
392: suser = pwd->pw_name;
1.102 markus 393: else if (!okname(suser)) {
394: xfree(bp);
1.1 deraadt 395: continue;
1.102 markus 396: }
397: if (tuser && !okname(tuser)) {
398: xfree(bp);
1.101 markus 399: continue;
1.102 markus 400: }
1.55 deraadt 401: snprintf(bp, len,
1.84 stevesk 402: "%s%s %s -n "
1.55 deraadt 403: "-l %s %s %s %s '%s%s%s:%s'",
1.44 deraadt 404: ssh_program, verbose_mode ? " -v" : "",
1.84 stevesk 405: ssh_options, suser, host, cmd, src,
1.44 deraadt 406: tuser ? tuser : "", tuser ? "@" : "",
407: thost, targ);
1.23 markus 408: } else {
409: host = cleanhostname(argv[i]);
1.55 deraadt 410: snprintf(bp, len,
1.84 stevesk 411: "exec %s%s %s -n %s "
1.55 deraadt 412: "%s %s '%s%s%s:%s'",
1.44 deraadt 413: ssh_program, verbose_mode ? " -v" : "",
1.84 stevesk 414: ssh_options, host, cmd, src,
1.44 deraadt 415: tuser ? tuser : "", tuser ? "@" : "",
416: thost, targ);
1.23 markus 417: }
1.18 markus 418: if (verbose_mode)
419: fprintf(stderr, "Executing: %s\n", bp);
420: (void) system(bp);
421: (void) xfree(bp);
422: } else { /* local to remote */
1.1 deraadt 423: if (remin == -1) {
424: len = strlen(targ) + CMDNEEDS + 20;
1.18 markus 425: bp = xmalloc(len);
1.55 deraadt 426: (void) snprintf(bp, len, "%s -t %s", cmd, targ);
1.23 markus 427: host = cleanhostname(thost);
1.35 deraadt 428: if (do_cmd(host, tuser, bp, &remin,
429: &remout, argc) < 0)
1.18 markus 430: exit(1);
1.1 deraadt 431: if (response() < 0)
432: exit(1);
1.18 markus 433: (void) xfree(bp);
1.1 deraadt 434: }
1.18 markus 435: source(1, argv + i);
1.1 deraadt 436: }
437: }
438: }
439:
440: void
1.104 djm 441: tolocal(int argc, char **argv)
1.1 deraadt 442: {
443: int i, len;
444: char *bp, *host, *src, *suser;
445:
446: for (i = 0; i < argc - 1; i++) {
1.18 markus 447: if (!(src = colon(argv[i]))) { /* Local to local. */
1.1 deraadt 448: len = strlen(_PATH_CP) + strlen(argv[i]) +
1.35 deraadt 449: strlen(argv[argc - 1]) + 20;
1.1 deraadt 450: bp = xmalloc(len);
1.55 deraadt 451: (void) snprintf(bp, len, "exec %s%s%s %s %s", _PATH_CP,
1.35 deraadt 452: iamrecursive ? " -r" : "", pflag ? " -p" : "",
453: argv[i], argv[argc - 1]);
1.18 markus 454: if (verbose_mode)
455: fprintf(stderr, "Executing: %s\n", bp);
1.1 deraadt 456: if (system(bp))
457: ++errs;
1.18 markus 458: (void) xfree(bp);
1.1 deraadt 459: continue;
460: }
461: *src++ = 0;
462: if (*src == 0)
463: src = ".";
1.94 markus 464: if ((host = strrchr(argv[i], '@')) == NULL) {
1.1 deraadt 465: host = argv[i];
466: suser = NULL;
467: } else {
468: *host++ = 0;
469: suser = argv[i];
470: if (*suser == '\0')
471: suser = pwd->pw_name;
472: }
1.23 markus 473: host = cleanhostname(host);
1.1 deraadt 474: len = strlen(src) + CMDNEEDS + 20;
1.18 markus 475: bp = xmalloc(len);
1.55 deraadt 476: (void) snprintf(bp, len, "%s -f %s", cmd, src);
1.35 deraadt 477: if (do_cmd(host, suser, bp, &remin, &remout, argc) < 0) {
1.18 markus 478: (void) xfree(bp);
479: ++errs;
480: continue;
1.1 deraadt 481: }
1.18 markus 482: xfree(bp);
1.1 deraadt 483: sink(1, argv + argc - 1);
1.18 markus 484: (void) close(remin);
1.1 deraadt 485: remin = remout = -1;
486: }
487: }
488:
489: void
1.104 djm 490: source(int argc, char **argv)
1.1 deraadt 491: {
492: struct stat stb;
493: static BUF buffer;
494: BUF *bp;
1.97 fgsch 495: off_t i, amt, result, statbytes;
1.68 markus 496: int fd, haderr, indx;
1.1 deraadt 497: char *last, *name, buf[2048];
1.65 deraadt 498: int len;
1.1 deraadt 499:
500: for (indx = 0; indx < argc; ++indx) {
1.18 markus 501: name = argv[indx];
1.11 aaron 502: statbytes = 0;
1.65 deraadt 503: len = strlen(name);
504: while (len > 1 && name[len-1] == '/')
505: name[--len] = '\0';
1.85 markus 506: if (strchr(name, '\n') != NULL) {
507: run_err("%s: skipping, filename contains a newline",
508: name);
509: goto next;
510: }
1.1 deraadt 511: if ((fd = open(name, O_RDONLY, 0)) < 0)
512: goto syserr;
513: if (fstat(fd, &stb) < 0) {
514: syserr: run_err("%s: %s", name, strerror(errno));
515: goto next;
516: }
517: switch (stb.st_mode & S_IFMT) {
518: case S_IFREG:
519: break;
520: case S_IFDIR:
521: if (iamrecursive) {
522: rsource(name, &stb);
523: goto next;
524: }
525: /* FALLTHROUGH */
526: default:
527: run_err("%s: not a regular file", name);
528: goto next;
529: }
530: if ((last = strrchr(name, '/')) == NULL)
531: last = name;
532: else
533: ++last;
1.11 aaron 534: curfile = last;
1.1 deraadt 535: if (pflag) {
536: /*
537: * Make it compatible with possible future
538: * versions expecting microseconds.
539: */
1.55 deraadt 540: (void) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n",
1.47 markus 541: (u_long) stb.st_mtime,
542: (u_long) stb.st_atime);
1.107 deraadt 543: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 544: if (response() < 0)
545: goto next;
546: }
547: #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
1.61 markus 548: snprintf(buf, sizeof buf, "C%04o %lld %s\n",
1.47 markus 549: (u_int) (stb.st_mode & FILEMODEMASK),
1.62 markus 550: (long long)stb.st_size, last);
1.18 markus 551: if (verbose_mode) {
552: fprintf(stderr, "Sending file modes: %s", buf);
553: }
1.107 deraadt 554: (void) atomicio(vwrite, remout, buf, strlen(buf));
1.1 deraadt 555: if (response() < 0)
556: goto next;
557: if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) {
1.18 markus 558: next: (void) close(fd);
1.1 deraadt 559: continue;
560: }
1.97 fgsch 561: if (showprogress)
562: start_progress_meter(curfile, stb.st_size, &statbytes);
1.1 deraadt 563: /* Keep writing after an error so that we stay sync'd up. */
564: for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
565: amt = bp->cnt;
566: if (i + amt > stb.st_size)
567: amt = stb.st_size - i;
568: if (!haderr) {
1.30 deraadt 569: result = atomicio(read, fd, bp->buf, amt);
1.1 deraadt 570: if (result != amt)
571: haderr = result >= 0 ? EIO : errno;
572: }
573: if (haderr)
1.107 deraadt 574: (void) atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 575: else {
1.107 deraadt 576: result = atomicio(vwrite, remout, bp->buf, amt);
1.1 deraadt 577: if (result != amt)
578: haderr = result >= 0 ? EIO : errno;
1.4 aaron 579: statbytes += result;
1.1 deraadt 580: }
1.99 markus 581: if (limit)
582: bwlimit(amt);
1.1 deraadt 583: }
1.18 markus 584: if (showprogress)
1.97 fgsch 585: stop_progress_meter();
1.4 aaron 586:
1.1 deraadt 587: if (close(fd) < 0 && !haderr)
588: haderr = errno;
589: if (!haderr)
1.107 deraadt 590: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 591: else
592: run_err("%s: %s", name, strerror(haderr));
1.18 markus 593: (void) response();
1.1 deraadt 594: }
595: }
596:
597: void
1.104 djm 598: rsource(char *name, struct stat *statp)
1.1 deraadt 599: {
600: DIR *dirp;
601: struct dirent *dp;
602: char *last, *vect[1], path[1100];
603:
604: if (!(dirp = opendir(name))) {
605: run_err("%s: %s", name, strerror(errno));
606: return;
607: }
608: last = strrchr(name, '/');
609: if (last == 0)
610: last = name;
611: else
612: last++;
613: if (pflag) {
1.55 deraadt 614: (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n",
1.47 markus 615: (u_long) statp->st_mtime,
616: (u_long) statp->st_atime);
1.107 deraadt 617: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 618: if (response() < 0) {
619: closedir(dirp);
620: return;
621: }
622: }
1.55 deraadt 623: (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n",
1.47 markus 624: (u_int) (statp->st_mode & FILEMODEMASK), 0, last);
1.18 markus 625: if (verbose_mode)
626: fprintf(stderr, "Entering directory: %s", path);
1.107 deraadt 627: (void) atomicio(vwrite, remout, path, strlen(path));
1.1 deraadt 628: if (response() < 0) {
629: closedir(dirp);
630: return;
631: }
1.63 stevesk 632: while ((dp = readdir(dirp)) != NULL) {
1.1 deraadt 633: if (dp->d_ino == 0)
634: continue;
635: if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
636: continue;
637: if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) {
638: run_err("%s/%s: name too long", name, dp->d_name);
639: continue;
640: }
1.55 deraadt 641: (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name);
1.1 deraadt 642: vect[0] = path;
643: source(1, vect);
644: }
1.18 markus 645: (void) closedir(dirp);
1.107 deraadt 646: (void) atomicio(vwrite, remout, "E\n", 2);
1.18 markus 647: (void) response();
1.1 deraadt 648: }
649:
650: void
1.99 markus 651: bwlimit(int amount)
652: {
653: static struct timeval bwstart, bwend;
654: static int lamt, thresh = 16384;
655: u_int64_t wait;
656: struct timespec ts, rm;
657:
658: if (!timerisset(&bwstart)) {
659: gettimeofday(&bwstart, NULL);
660: return;
661: }
662:
663: lamt += amount;
664: if (lamt < thresh)
665: return;
666:
667: gettimeofday(&bwend, NULL);
668: timersub(&bwend, &bwstart, &bwend);
669: if (!timerisset(&bwend))
670: return;
671:
672: lamt *= 8;
673: wait = (double)1000000L * lamt / limit;
674:
675: bwstart.tv_sec = wait / 1000000L;
676: bwstart.tv_usec = wait % 1000000L;
677:
678: if (timercmp(&bwstart, &bwend, >)) {
679: timersub(&bwstart, &bwend, &bwend);
680:
681: /* Adjust the wait time */
682: if (bwend.tv_sec) {
683: thresh /= 2;
684: if (thresh < 2048)
685: thresh = 2048;
686: } else if (bwend.tv_usec < 100) {
687: thresh *= 2;
688: if (thresh > 32768)
689: thresh = 32768;
690: }
691:
692: TIMEVAL_TO_TIMESPEC(&bwend, &ts);
693: while (nanosleep(&ts, &rm) == -1) {
694: if (errno != EINTR)
695: break;
696: ts = rm;
697: }
698: }
699:
700: lamt = 0;
701: gettimeofday(&bwstart, NULL);
702: }
703:
704: void
1.104 djm 705: sink(int argc, char **argv)
1.1 deraadt 706: {
707: static BUF buffer;
708: struct stat stb;
1.18 markus 709: enum {
710: YES, NO, DISPLAYED
711: } wrerr;
1.1 deraadt 712: BUF *bp;
713: off_t i, j;
714: int amt, count, exists, first, mask, mode, ofd, omode;
1.97 fgsch 715: off_t size, statbytes;
1.36 deraadt 716: int setimes, targisdir, wrerrno = 0;
1.1 deraadt 717: char ch, *cp, *np, *targ, *why, *vect[1], buf[2048];
1.40 markus 718: struct timeval tv[2];
1.1 deraadt 719:
1.66 stevesk 720: #define atime tv[0]
721: #define mtime tv[1]
1.75 deraadt 722: #define SCREWUP(str) do { why = str; goto screwup; } while (0)
1.1 deraadt 723:
724: setimes = targisdir = 0;
725: mask = umask(0);
726: if (!pflag)
1.18 markus 727: (void) umask(mask);
1.1 deraadt 728: if (argc != 1) {
729: run_err("ambiguous target");
730: exit(1);
731: }
732: targ = *argv;
733: if (targetshouldbedirectory)
734: verifydir(targ);
1.18 markus 735:
1.107 deraadt 736: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 737: if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
738: targisdir = 1;
739: for (first = 1;; first = 0) {
740: cp = buf;
1.30 deraadt 741: if (atomicio(read, remin, cp, 1) <= 0)
1.1 deraadt 742: return;
743: if (*cp++ == '\n')
744: SCREWUP("unexpected <newline>");
745: do {
1.30 deraadt 746: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 747: SCREWUP("lost connection");
748: *cp++ = ch;
749: } while (cp < &buf[sizeof(buf) - 1] && ch != '\n');
750: *cp = 0;
751:
752: if (buf[0] == '\01' || buf[0] == '\02') {
753: if (iamremote == 0)
1.107 deraadt 754: (void) atomicio(vwrite, STDERR_FILENO,
1.44 deraadt 755: buf + 1, strlen(buf + 1));
1.1 deraadt 756: if (buf[0] == '\02')
757: exit(1);
758: ++errs;
759: continue;
760: }
761: if (buf[0] == 'E') {
1.107 deraadt 762: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 763: return;
764: }
765: if (ch == '\n')
766: *--cp = 0;
767:
768: cp = buf;
769: if (*cp == 'T') {
770: setimes++;
771: cp++;
1.66 stevesk 772: mtime.tv_sec = strtol(cp, &cp, 10);
773: if (!cp || *cp++ != ' ')
1.1 deraadt 774: SCREWUP("mtime.sec not delimited");
1.66 stevesk 775: mtime.tv_usec = strtol(cp, &cp, 10);
776: if (!cp || *cp++ != ' ')
1.1 deraadt 777: SCREWUP("mtime.usec not delimited");
1.66 stevesk 778: atime.tv_sec = strtol(cp, &cp, 10);
779: if (!cp || *cp++ != ' ')
1.1 deraadt 780: SCREWUP("atime.sec not delimited");
1.66 stevesk 781: atime.tv_usec = strtol(cp, &cp, 10);
782: if (!cp || *cp++ != '\0')
1.1 deraadt 783: SCREWUP("atime.usec not delimited");
1.107 deraadt 784: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 785: continue;
786: }
787: if (*cp != 'C' && *cp != 'D') {
788: /*
789: * Check for the case "rcp remote:foo\* local:bar".
790: * In this case, the line "No match." can be returned
791: * by the shell before the rcp command on the remote is
792: * executed so the ^Aerror_message convention isn't
793: * followed.
794: */
795: if (first) {
796: run_err("%s", cp);
797: exit(1);
798: }
799: SCREWUP("expected control record");
800: }
801: mode = 0;
802: for (++cp; cp < buf + 5; cp++) {
803: if (*cp < '0' || *cp > '7')
804: SCREWUP("bad mode");
805: mode = (mode << 3) | (*cp - '0');
806: }
807: if (*cp++ != ' ')
808: SCREWUP("mode not delimited");
809:
1.63 stevesk 810: for (size = 0; isdigit(*cp);)
1.1 deraadt 811: size = size * 10 + (*cp++ - '0');
812: if (*cp++ != ' ')
813: SCREWUP("size not delimited");
814: if (targisdir) {
815: static char *namebuf;
816: static int cursize;
817: size_t need;
818:
819: need = strlen(targ) + strlen(cp) + 250;
1.55 deraadt 820: if (need > cursize) {
1.58 danh 821: if (namebuf)
822: xfree(namebuf);
1.18 markus 823: namebuf = xmalloc(need);
1.55 deraadt 824: cursize = need;
825: }
826: (void) snprintf(namebuf, need, "%s%s%s", targ,
1.88 mouring 827: strcmp(targ, "/") ? "/" : "", cp);
1.1 deraadt 828: np = namebuf;
829: } else
830: np = targ;
1.12 aaron 831: curfile = cp;
1.1 deraadt 832: exists = stat(np, &stb) == 0;
833: if (buf[0] == 'D') {
834: int mod_flag = pflag;
835: if (exists) {
836: if (!S_ISDIR(stb.st_mode)) {
837: errno = ENOTDIR;
838: goto bad;
839: }
840: if (pflag)
1.18 markus 841: (void) chmod(np, mode);
1.1 deraadt 842: } else {
1.18 markus 843: /* Handle copying from a read-only
844: directory */
1.1 deraadt 845: mod_flag = 1;
846: if (mkdir(np, mode | S_IRWXU) < 0)
847: goto bad;
848: }
1.58 danh 849: vect[0] = xstrdup(np);
1.1 deraadt 850: sink(1, vect);
851: if (setimes) {
852: setimes = 0;
1.59 deraadt 853: if (utimes(vect[0], tv) < 0)
1.18 markus 854: run_err("%s: set times: %s",
1.59 deraadt 855: vect[0], strerror(errno));
1.1 deraadt 856: }
857: if (mod_flag)
1.59 deraadt 858: (void) chmod(vect[0], mode);
859: if (vect[0])
860: xfree(vect[0]);
1.1 deraadt 861: continue;
862: }
863: omode = mode;
864: mode |= S_IWRITE;
1.71 markus 865: if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
1.1 deraadt 866: bad: run_err("%s: %s", np, strerror(errno));
867: continue;
868: }
1.107 deraadt 869: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 870: if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) {
1.18 markus 871: (void) close(ofd);
1.1 deraadt 872: continue;
873: }
874: cp = bp->buf;
875: wrerr = NO;
1.7 deraadt 876:
1.12 aaron 877: statbytes = 0;
1.97 fgsch 878: if (showprogress)
879: start_progress_meter(curfile, size, &statbytes);
1.1 deraadt 880: for (count = i = 0; i < size; i += 4096) {
881: amt = 4096;
882: if (i + amt > size)
883: amt = size - i;
884: count += amt;
885: do {
1.43 markus 886: j = read(remin, cp, amt);
1.78 deraadt 887: if (j == -1 && (errno == EINTR ||
888: errno == EAGAIN)) {
1.43 markus 889: continue;
890: } else if (j <= 0) {
1.1 deraadt 891: run_err("%s", j ? strerror(errno) :
1.63 stevesk 892: "dropped connection");
1.1 deraadt 893: exit(1);
894: }
895: amt -= j;
896: cp += j;
1.18 markus 897: statbytes += j;
1.1 deraadt 898: } while (amt > 0);
1.99 markus 899:
900: if (limit)
901: bwlimit(4096);
902:
1.1 deraadt 903: if (count == bp->cnt) {
904: /* Keep reading so we stay sync'd up. */
905: if (wrerr == NO) {
1.107 deraadt 906: j = atomicio(vwrite, ofd, bp->buf, count);
1.1 deraadt 907: if (j != count) {
908: wrerr = YES;
1.18 markus 909: wrerrno = j >= 0 ? EIO : errno;
1.1 deraadt 910: }
911: }
912: count = 0;
913: cp = bp->buf;
914: }
915: }
1.7 deraadt 916: if (showprogress)
1.97 fgsch 917: stop_progress_meter();
1.1 deraadt 918: if (count != 0 && wrerr == NO &&
1.107 deraadt 919: (j = atomicio(vwrite, ofd, bp->buf, count)) != count) {
1.1 deraadt 920: wrerr = YES;
1.18 markus 921: wrerrno = j >= 0 ? EIO : errno;
1.1 deraadt 922: }
1.98 djm 923: if (wrerr == NO && ftruncate(ofd, size) != 0) {
1.1 deraadt 924: run_err("%s: truncate: %s", np, strerror(errno));
925: wrerr = DISPLAYED;
926: }
927: if (pflag) {
928: if (exists || omode != mode)
929: if (fchmod(ofd, omode))
930: run_err("%s: set mode: %s",
1.63 stevesk 931: np, strerror(errno));
1.1 deraadt 932: } else {
933: if (!exists && omode != mode)
934: if (fchmod(ofd, omode & ~mask))
935: run_err("%s: set mode: %s",
1.63 stevesk 936: np, strerror(errno));
1.1 deraadt 937: }
1.33 provos 938: if (close(ofd) == -1) {
939: wrerr = YES;
940: wrerrno = errno;
941: }
1.18 markus 942: (void) response();
1.1 deraadt 943: if (setimes && wrerr == NO) {
944: setimes = 0;
1.40 markus 945: if (utimes(np, tv) < 0) {
1.1 deraadt 946: run_err("%s: set times: %s",
1.63 stevesk 947: np, strerror(errno));
1.1 deraadt 948: wrerr = DISPLAYED;
949: }
950: }
1.18 markus 951: switch (wrerr) {
1.1 deraadt 952: case YES:
953: run_err("%s: %s", np, strerror(wrerrno));
954: break;
955: case NO:
1.107 deraadt 956: (void) atomicio(vwrite, remout, "", 1);
1.1 deraadt 957: break;
958: case DISPLAYED:
959: break;
960: }
961: }
962: screwup:
963: run_err("protocol error: %s", why);
964: exit(1);
965: }
966:
967: int
1.86 itojun 968: response(void)
1.1 deraadt 969: {
970: char ch, *cp, resp, rbuf[2048];
971:
1.30 deraadt 972: if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp))
1.1 deraadt 973: lostconn(0);
974:
975: cp = rbuf;
1.18 markus 976: switch (resp) {
977: case 0: /* ok */
1.1 deraadt 978: return (0);
979: default:
980: *cp++ = resp;
981: /* FALLTHROUGH */
1.18 markus 982: case 1: /* error, followed by error msg */
983: case 2: /* fatal error, "" */
1.1 deraadt 984: do {
1.30 deraadt 985: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 986: lostconn(0);
987: *cp++ = ch;
988: } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
989:
990: if (!iamremote)
1.107 deraadt 991: (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf);
1.1 deraadt 992: ++errs;
993: if (resp == 1)
994: return (-1);
995: exit(1);
996: }
997: /* NOTREACHED */
998: }
999:
1000: void
1.86 itojun 1001: usage(void)
1.1 deraadt 1002: {
1.83 stevesk 1003: (void) fprintf(stderr,
1.100 markus 1004: "usage: scp [-pqrvBC1246] [-F config] [-S program] [-P port]\n"
1.99 markus 1005: " [-c cipher] [-i identity] [-l limit] [-o option]\n"
1.90 deraadt 1006: " [[user@]host1:]file1 [...] [[user@]host2:]file2\n");
1.1 deraadt 1007: exit(1);
1008: }
1009:
1010: void
1.18 markus 1011: run_err(const char *fmt,...)
1.1 deraadt 1012: {
1013: static FILE *fp;
1014: va_list ap;
1015:
1016: ++errs;
1017: if (fp == NULL && !(fp = fdopen(remout, "w")))
1018: return;
1.18 markus 1019: (void) fprintf(fp, "%c", 0x01);
1020: (void) fprintf(fp, "scp: ");
1.73 markus 1021: va_start(ap, fmt);
1.18 markus 1022: (void) vfprintf(fp, fmt, ap);
1.73 markus 1023: va_end(ap);
1.18 markus 1024: (void) fprintf(fp, "\n");
1025: (void) fflush(fp);
1026:
1027: if (!iamremote) {
1.73 markus 1028: va_start(ap, fmt);
1.18 markus 1029: vfprintf(stderr, fmt, ap);
1.73 markus 1030: va_end(ap);
1.18 markus 1031: fprintf(stderr, "\n");
1032: }
1.1 deraadt 1033: }
1034:
1035: void
1.104 djm 1036: verifydir(char *cp)
1.1 deraadt 1037: {
1038: struct stat stb;
1039:
1040: if (!stat(cp, &stb)) {
1041: if (S_ISDIR(stb.st_mode))
1042: return;
1043: errno = ENOTDIR;
1044: }
1045: run_err("%s: %s", cp, strerror(errno));
1046: exit(1);
1047: }
1048:
1049: int
1.104 djm 1050: okname(char *cp0)
1.1 deraadt 1051: {
1052: int c;
1053: char *cp;
1054:
1055: cp = cp0;
1056: do {
1.75 deraadt 1057: c = (int)*cp;
1.1 deraadt 1058: if (c & 0200)
1059: goto bad;
1.101 markus 1060: if (!isalpha(c) && !isdigit(c)) {
1061: switch (c) {
1062: case '\'':
1063: case '"':
1064: case '`':
1065: case ' ':
1066: case '#':
1067: goto bad;
1068: default:
1069: break;
1070: }
1071: }
1.1 deraadt 1072: } while (*++cp);
1073: return (1);
1074:
1.25 markus 1075: bad: fprintf(stderr, "%s: invalid user name\n", cp0);
1.1 deraadt 1076: return (0);
1077: }
1078:
1079: BUF *
1.104 djm 1080: allocbuf(BUF *bp, int fd, int blksize)
1.1 deraadt 1081: {
1082: size_t size;
1083: struct stat stb;
1084:
1085: if (fstat(fd, &stb) < 0) {
1086: run_err("fstat: %s", strerror(errno));
1087: return (0);
1088: }
1.95 markus 1089: size = roundup(stb.st_blksize, blksize);
1090: if (size == 0)
1.18 markus 1091: size = blksize;
1.1 deraadt 1092: if (bp->cnt >= size)
1093: return (bp);
1.18 markus 1094: if (bp->buf == NULL)
1095: bp->buf = xmalloc(size);
1096: else
1097: bp->buf = xrealloc(bp->buf, size);
1.81 markus 1098: memset(bp->buf, 0, size);
1.1 deraadt 1099: bp->cnt = size;
1100: return (bp);
1101: }
1102:
1103: void
1.104 djm 1104: lostconn(int signo)
1.1 deraadt 1105: {
1106: if (!iamremote)
1.74 markus 1107: write(STDERR_FILENO, "lost connection\n", 16);
1108: if (signo)
1109: _exit(1);
1110: else
1111: exit(1);
1.4 aaron 1112: }
![[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