Annotation of src/usr.bin/ssh/scp.c, Revision 1.91.2.1
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.
55: * 3. All advertising materials mentioning features or use of this software
56: * must display the following acknowledgement:
57: * This product includes software developed by the University of
58: * California, Berkeley and its contributors.
59: * 4. Neither the name of the University nor the names of its contributors
60: * may be used to endorse or promote products derived from this software
61: * without specific prior written permission.
62: *
63: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
64: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
65: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
66: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
67: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
68: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
69: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
70: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
71: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
72: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
73: * SUCH DAMAGE.
74: *
75: */
76:
77: #include "includes.h"
1.91.2.1! margarid 78: RCSID("$OpenBSD: scp.c,v 1.102 2003/03/05 22:33:43 markus Exp $");
1.1 deraadt 79:
80: #include "xmalloc.h"
1.51 markus 81: #include "atomicio.h"
1.50 markus 82: #include "pathnames.h"
1.51 markus 83: #include "log.h"
1.69 mouring 84: #include "misc.h"
1.91.2.1! margarid 85: #include "progressmeter.h"
1.1 deraadt 86:
1.35 deraadt 87: int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout, int argc);
1.11 aaron 88:
1.91.2.1! margarid 89: void bwlimit(int);
! 90:
1.70 mouring 91: /* Struct for addargs */
92: arglist args;
1.41 markus 93:
1.91.2.1! margarid 94: /* Bandwidth limit */
! 95: off_t limit = 0;
1.11 aaron 96:
97: /* Name of current file being transferred. */
98: char *curfile;
1.4 aaron 99:
1.1 deraadt 100: /* This is set to non-zero to enable verbose mode. */
1.17 markus 101: int verbose_mode = 0;
1.1 deraadt 102:
1.6 aaron 103: /* This is set to zero if the progressmeter is not desired. */
104: int showprogress = 1;
105:
1.34 deraadt 106: /* This is the program to execute for the secured connection. ("ssh" or -S) */
1.50 markus 107: char *ssh_program = _PATH_SSH_PROGRAM;
1.34 deraadt 108:
1.91.2.1! margarid 109: /* This is used to store the pid of ssh_program */
! 110: pid_t do_cmd_pid;
! 111:
1.20 markus 112: /*
113: * This function executes the given command as the specified user on the
114: * given host. This returns < 0 if execution fails, and >= 0 otherwise. This
115: * assigns the input and output file descriptors on success.
116: */
1.1 deraadt 117:
1.27 markus 118: int
1.35 deraadt 119: do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout, int argc)
1.1 deraadt 120: {
1.18 markus 121: int pin[2], pout[2], reserved[2];
122:
123: if (verbose_mode)
1.78 deraadt 124: fprintf(stderr,
125: "Executing: program %s host %s, user %s, command %s\n",
126: ssh_program, host,
127: remuser ? remuser : "(unspecified)", cmd);
1.18 markus 128:
1.20 markus 129: /*
130: * Reserve two descriptors so that the real pipes won't get
131: * descriptors 0 and 1 because that will screw up dup2 below.
132: */
1.18 markus 133: pipe(reserved);
134:
135: /* Create a socket pair for communicating with ssh. */
136: if (pipe(pin) < 0)
137: fatal("pipe: %s", strerror(errno));
138: if (pipe(pout) < 0)
139: fatal("pipe: %s", strerror(errno));
140:
141: /* Free the reserved descriptors. */
142: close(reserved[0]);
143: close(reserved[1]);
144:
145: /* For a child to execute the command on the remote host using ssh. */
1.91.2.1! margarid 146: do_cmd_pid = fork();
! 147: if (do_cmd_pid == 0) {
1.18 markus 148: /* Child. */
149: close(pin[1]);
150: close(pout[0]);
151: dup2(pin[0], 0);
152: dup2(pout[1], 1);
153: close(pin[0]);
154: close(pout[1]);
155:
1.41 markus 156: args.list[0] = ssh_program;
157: if (remuser != NULL)
1.70 mouring 158: addargs(&args, "-l%s", remuser);
159: addargs(&args, "%s", host);
160: addargs(&args, "%s", cmd);
1.18 markus 161:
1.41 markus 162: execvp(ssh_program, args.list);
1.34 deraadt 163: perror(ssh_program);
1.18 markus 164: exit(1);
1.91.2.1! margarid 165: } else if (do_cmd_pid == -1) {
! 166: fatal("fork: %s", strerror(errno));
1.18 markus 167: }
168: /* Parent. Close the other side, and return the local side. */
169: close(pin[0]);
170: *fdout = pin[1];
171: close(pout[1]);
172: *fdin = pout[0];
173: return 0;
1.1 deraadt 174: }
175:
176: typedef struct {
177: int cnt;
178: char *buf;
179: } BUF;
180:
1.18 markus 181: BUF *allocbuf(BUF *, int, int);
182: void lostconn(int);
183: void nospace(void);
184: int okname(char *);
185: void run_err(const char *,...);
186: void verifydir(char *);
1.1 deraadt 187:
188: struct passwd *pwd;
1.18 markus 189: uid_t userid;
1.1 deraadt 190: int errs, remin, remout;
191: int pflag, iamremote, iamrecursive, targetshouldbedirectory;
192:
193: #define CMDNEEDS 64
194: char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
195:
1.18 markus 196: int response(void);
197: void rsource(char *, struct stat *);
198: void sink(int, char *[]);
199: void source(int, char *[]);
200: void tolocal(int, char *[]);
201: void toremote(char *, int, char *[]);
202: void usage(void);
1.1 deraadt 203:
204: int
205: main(argc, argv)
206: int argc;
207: char *argv[];
208: {
1.91.2.1! margarid 209: int ch, fflag, tflag, status;
! 210: double speed;
! 211: char *targ, *endp;
1.1 deraadt 212: extern char *optarg;
213: extern int optind;
214:
1.41 markus 215: args.list = NULL;
1.91 deraadt 216: addargs(&args, "ssh"); /* overwritten with ssh_program */
1.70 mouring 217: addargs(&args, "-x");
1.82 stevesk 218: addargs(&args, "-oForwardAgent no");
1.84 stevesk 219: addargs(&args, "-oClearAllForwardings yes");
1.41 markus 220:
1.1 deraadt 221: fflag = tflag = 0;
1.91.2.1! margarid 222: while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q1246S:o:F:")) != -1)
1.18 markus 223: switch (ch) {
224: /* User-visible flags. */
1.91.2.1! margarid 225: case '1':
! 226: case '2':
1.23 markus 227: case '4':
1.41 markus 228: case '6':
229: case 'C':
1.70 mouring 230: addargs(&args, "-%c", ch);
1.41 markus 231: break;
232: case 'o':
233: case 'c':
234: case 'i':
1.83 stevesk 235: case 'F':
1.70 mouring 236: addargs(&args, "-%c%s", ch, optarg);
1.23 markus 237: break;
1.41 markus 238: case 'P':
1.70 mouring 239: addargs(&args, "-p%s", optarg);
1.41 markus 240: break;
241: case 'B':
1.70 mouring 242: addargs(&args, "-oBatchmode yes");
1.23 markus 243: break;
1.91.2.1! margarid 244: case 'l':
! 245: speed = strtod(optarg, &endp);
! 246: if (speed <= 0 || *endp != '\0')
! 247: usage();
! 248: limit = speed * 1024;
! 249: break;
1.1 deraadt 250: case 'p':
251: pflag = 1;
252: break;
253: case 'r':
254: iamrecursive = 1;
255: break;
1.34 deraadt 256: case 'S':
1.41 markus 257: ssh_program = xstrdup(optarg);
258: break;
259: case 'v':
1.72 markus 260: addargs(&args, "-v");
1.41 markus 261: verbose_mode = 1;
262: break;
263: case 'q':
264: showprogress = 0;
1.34 deraadt 265: break;
266:
1.18 markus 267: /* Server options. */
1.1 deraadt 268: case 'd':
269: targetshouldbedirectory = 1;
270: break;
1.18 markus 271: case 'f': /* "from" */
1.1 deraadt 272: iamremote = 1;
273: fflag = 1;
274: break;
1.18 markus 275: case 't': /* "to" */
1.1 deraadt 276: iamremote = 1;
277: tflag = 1;
278: break;
279: default:
280: usage();
281: }
282: argc -= optind;
283: argv += optind;
284:
285: if ((pwd = getpwuid(userid = getuid())) == NULL)
1.18 markus 286: fatal("unknown user %d", (int) userid);
1.1 deraadt 287:
1.18 markus 288: if (!isatty(STDERR_FILENO))
1.7 deraadt 289: showprogress = 0;
290:
1.1 deraadt 291: remin = STDIN_FILENO;
292: remout = STDOUT_FILENO;
293:
1.52 stevesk 294: if (fflag) {
1.18 markus 295: /* Follow "protocol", send data. */
296: (void) response();
1.1 deraadt 297: source(argc, argv);
298: exit(errs != 0);
299: }
1.18 markus 300: if (tflag) {
301: /* Receive data. */
1.1 deraadt 302: sink(argc, argv);
303: exit(errs != 0);
304: }
305: if (argc < 2)
306: usage();
307: if (argc > 2)
308: targetshouldbedirectory = 1;
309:
310: remin = remout = -1;
1.91.2.1! margarid 311: do_cmd_pid = -1;
1.1 deraadt 312: /* Command to be executed on remote system using "ssh". */
1.55 deraadt 313: (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
314: verbose_mode ? " -v" : "",
1.35 deraadt 315: iamrecursive ? " -r" : "", pflag ? " -p" : "",
316: targetshouldbedirectory ? " -d" : "");
1.1 deraadt 317:
1.18 markus 318: (void) signal(SIGPIPE, lostconn);
1.1 deraadt 319:
320: if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */
321: toremote(targ, argc, argv);
322: else {
1.18 markus 323: tolocal(argc, argv); /* Dest is local host. */
1.1 deraadt 324: if (targetshouldbedirectory)
325: verifydir(argv[argc - 1]);
326: }
1.91.2.1! margarid 327: /*
! 328: * Finally check the exit status of the ssh process, if one was forked
! 329: * and no error has occured yet
! 330: */
! 331: if (do_cmd_pid != -1 && errs == 0) {
! 332: if (remin != -1)
! 333: (void) close(remin);
! 334: if (remout != -1)
! 335: (void) close(remout);
! 336: if (waitpid(do_cmd_pid, &status, 0) == -1)
! 337: errs = 1;
! 338: else {
! 339: if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
! 340: errs = 1;
! 341: }
! 342: }
1.1 deraadt 343: exit(errs != 0);
344: }
345:
346: void
347: toremote(targ, argc, argv)
348: char *targ, *argv[];
349: int argc;
350: {
351: int i, len;
352: char *bp, *host, *src, *suser, *thost, *tuser;
353:
354: *targ++ = 0;
355: if (*targ == 0)
356: targ = ".";
357:
1.91.2.1! margarid 358: if ((thost = strrchr(argv[argc - 1], '@'))) {
1.1 deraadt 359: /* user@host */
360: *thost++ = 0;
361: tuser = argv[argc - 1];
362: if (*tuser == '\0')
363: tuser = NULL;
364: } else {
365: thost = argv[argc - 1];
366: tuser = NULL;
367: }
368:
369: for (i = 0; i < argc - 1; i++) {
370: src = colon(argv[i]);
1.18 markus 371: if (src) { /* remote to remote */
1.84 stevesk 372: static char *ssh_options =
1.89 markus 373: "-x -o'ClearAllForwardings yes'";
1.1 deraadt 374: *src++ = 0;
375: if (*src == 0)
376: src = ".";
1.91.2.1! margarid 377: host = strrchr(argv[i], '@');
1.34 deraadt 378: len = strlen(ssh_program) + strlen(argv[i]) +
1.35 deraadt 379: strlen(src) + (tuser ? strlen(tuser) : 0) +
1.84 stevesk 380: strlen(thost) + strlen(targ) +
381: strlen(ssh_options) + CMDNEEDS + 20;
1.18 markus 382: bp = xmalloc(len);
1.1 deraadt 383: if (host) {
384: *host++ = 0;
1.23 markus 385: host = cleanhostname(host);
1.1 deraadt 386: suser = argv[i];
387: if (*suser == '\0')
388: suser = pwd->pw_name;
1.91.2.1! margarid 389: else if (!okname(suser)) {
! 390: xfree(bp);
1.1 deraadt 391: continue;
1.91.2.1! margarid 392: }
! 393: if (tuser && !okname(tuser)) {
! 394: xfree(bp);
! 395: continue;
! 396: }
1.55 deraadt 397: snprintf(bp, len,
1.84 stevesk 398: "%s%s %s -n "
1.55 deraadt 399: "-l %s %s %s %s '%s%s%s:%s'",
1.44 deraadt 400: ssh_program, verbose_mode ? " -v" : "",
1.84 stevesk 401: ssh_options, suser, host, cmd, src,
1.44 deraadt 402: tuser ? tuser : "", tuser ? "@" : "",
403: thost, targ);
1.23 markus 404: } else {
405: host = cleanhostname(argv[i]);
1.55 deraadt 406: snprintf(bp, len,
1.84 stevesk 407: "exec %s%s %s -n %s "
1.55 deraadt 408: "%s %s '%s%s%s:%s'",
1.44 deraadt 409: ssh_program, verbose_mode ? " -v" : "",
1.84 stevesk 410: ssh_options, host, cmd, src,
1.44 deraadt 411: tuser ? tuser : "", tuser ? "@" : "",
412: thost, targ);
1.23 markus 413: }
1.18 markus 414: if (verbose_mode)
415: fprintf(stderr, "Executing: %s\n", bp);
416: (void) system(bp);
417: (void) xfree(bp);
418: } else { /* local to remote */
1.1 deraadt 419: if (remin == -1) {
420: len = strlen(targ) + CMDNEEDS + 20;
1.18 markus 421: bp = xmalloc(len);
1.55 deraadt 422: (void) snprintf(bp, len, "%s -t %s", cmd, targ);
1.23 markus 423: host = cleanhostname(thost);
1.35 deraadt 424: if (do_cmd(host, tuser, bp, &remin,
425: &remout, argc) < 0)
1.18 markus 426: exit(1);
1.1 deraadt 427: if (response() < 0)
428: exit(1);
1.18 markus 429: (void) xfree(bp);
1.1 deraadt 430: }
1.18 markus 431: source(1, argv + i);
1.1 deraadt 432: }
433: }
434: }
435:
436: void
437: tolocal(argc, argv)
438: int argc;
439: char *argv[];
440: {
441: int i, len;
442: char *bp, *host, *src, *suser;
443:
444: for (i = 0; i < argc - 1; i++) {
1.18 markus 445: if (!(src = colon(argv[i]))) { /* Local to local. */
1.1 deraadt 446: len = strlen(_PATH_CP) + strlen(argv[i]) +
1.35 deraadt 447: strlen(argv[argc - 1]) + 20;
1.1 deraadt 448: bp = xmalloc(len);
1.55 deraadt 449: (void) snprintf(bp, len, "exec %s%s%s %s %s", _PATH_CP,
1.35 deraadt 450: iamrecursive ? " -r" : "", pflag ? " -p" : "",
451: argv[i], argv[argc - 1]);
1.18 markus 452: if (verbose_mode)
453: fprintf(stderr, "Executing: %s\n", bp);
1.1 deraadt 454: if (system(bp))
455: ++errs;
1.18 markus 456: (void) xfree(bp);
1.1 deraadt 457: continue;
458: }
459: *src++ = 0;
460: if (*src == 0)
461: src = ".";
1.91.2.1! margarid 462: if ((host = strrchr(argv[i], '@')) == NULL) {
1.1 deraadt 463: host = argv[i];
464: suser = NULL;
465: } else {
466: *host++ = 0;
467: suser = argv[i];
468: if (*suser == '\0')
469: suser = pwd->pw_name;
470: }
1.23 markus 471: host = cleanhostname(host);
1.1 deraadt 472: len = strlen(src) + CMDNEEDS + 20;
1.18 markus 473: bp = xmalloc(len);
1.55 deraadt 474: (void) snprintf(bp, len, "%s -f %s", cmd, src);
1.35 deraadt 475: if (do_cmd(host, suser, bp, &remin, &remout, argc) < 0) {
1.18 markus 476: (void) xfree(bp);
477: ++errs;
478: continue;
1.1 deraadt 479: }
1.18 markus 480: xfree(bp);
1.1 deraadt 481: sink(1, argv + argc - 1);
1.18 markus 482: (void) close(remin);
1.1 deraadt 483: remin = remout = -1;
484: }
485: }
486:
487: void
488: source(argc, argv)
489: int argc;
490: char *argv[];
491: {
492: struct stat stb;
493: static BUF buffer;
494: BUF *bp;
1.91.2.1! margarid 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);
1.29 deraadt 543: (void) atomicio(write, 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: }
1.29 deraadt 554: (void) atomicio(write, 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: }
1.91.2.1! margarid 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)
1.29 deraadt 574: (void) atomicio(write, remout, bp->buf, amt);
1.1 deraadt 575: else {
1.29 deraadt 576: result = atomicio(write, 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: }
1.91.2.1! margarid 581: if (limit)
! 582: bwlimit(amt);
1.1 deraadt 583: }
1.18 markus 584: if (showprogress)
1.91.2.1! margarid 585: stop_progress_meter();
1.4 aaron 586:
1.1 deraadt 587: if (close(fd) < 0 && !haderr)
588: haderr = errno;
589: if (!haderr)
1.29 deraadt 590: (void) atomicio(write, 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
598: rsource(name, statp)
599: char *name;
600: struct stat *statp;
601: {
602: DIR *dirp;
603: struct dirent *dp;
604: char *last, *vect[1], path[1100];
605:
606: if (!(dirp = opendir(name))) {
607: run_err("%s: %s", name, strerror(errno));
608: return;
609: }
610: last = strrchr(name, '/');
611: if (last == 0)
612: last = name;
613: else
614: last++;
615: if (pflag) {
1.55 deraadt 616: (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n",
1.47 markus 617: (u_long) statp->st_mtime,
618: (u_long) statp->st_atime);
1.29 deraadt 619: (void) atomicio(write, remout, path, strlen(path));
1.1 deraadt 620: if (response() < 0) {
621: closedir(dirp);
622: return;
623: }
624: }
1.55 deraadt 625: (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n",
1.47 markus 626: (u_int) (statp->st_mode & FILEMODEMASK), 0, last);
1.18 markus 627: if (verbose_mode)
628: fprintf(stderr, "Entering directory: %s", path);
1.29 deraadt 629: (void) atomicio(write, remout, path, strlen(path));
1.1 deraadt 630: if (response() < 0) {
631: closedir(dirp);
632: return;
633: }
1.63 stevesk 634: while ((dp = readdir(dirp)) != NULL) {
1.1 deraadt 635: if (dp->d_ino == 0)
636: continue;
637: if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
638: continue;
639: if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) {
640: run_err("%s/%s: name too long", name, dp->d_name);
641: continue;
642: }
1.55 deraadt 643: (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name);
1.1 deraadt 644: vect[0] = path;
645: source(1, vect);
646: }
1.18 markus 647: (void) closedir(dirp);
1.29 deraadt 648: (void) atomicio(write, remout, "E\n", 2);
1.18 markus 649: (void) response();
1.1 deraadt 650: }
651:
652: void
1.91.2.1! margarid 653: bwlimit(int amount)
! 654: {
! 655: static struct timeval bwstart, bwend;
! 656: static int lamt, thresh = 16384;
! 657: u_int64_t wait;
! 658: struct timespec ts, rm;
! 659:
! 660: if (!timerisset(&bwstart)) {
! 661: gettimeofday(&bwstart, NULL);
! 662: return;
! 663: }
! 664:
! 665: lamt += amount;
! 666: if (lamt < thresh)
! 667: return;
! 668:
! 669: gettimeofday(&bwend, NULL);
! 670: timersub(&bwend, &bwstart, &bwend);
! 671: if (!timerisset(&bwend))
! 672: return;
! 673:
! 674: lamt *= 8;
! 675: wait = (double)1000000L * lamt / limit;
! 676:
! 677: bwstart.tv_sec = wait / 1000000L;
! 678: bwstart.tv_usec = wait % 1000000L;
! 679:
! 680: if (timercmp(&bwstart, &bwend, >)) {
! 681: timersub(&bwstart, &bwend, &bwend);
! 682:
! 683: /* Adjust the wait time */
! 684: if (bwend.tv_sec) {
! 685: thresh /= 2;
! 686: if (thresh < 2048)
! 687: thresh = 2048;
! 688: } else if (bwend.tv_usec < 100) {
! 689: thresh *= 2;
! 690: if (thresh > 32768)
! 691: thresh = 32768;
! 692: }
! 693:
! 694: TIMEVAL_TO_TIMESPEC(&bwend, &ts);
! 695: while (nanosleep(&ts, &rm) == -1) {
! 696: if (errno != EINTR)
! 697: break;
! 698: ts = rm;
! 699: }
! 700: }
! 701:
! 702: lamt = 0;
! 703: gettimeofday(&bwstart, NULL);
! 704: }
! 705:
! 706: void
1.1 deraadt 707: sink(argc, argv)
708: int argc;
709: char *argv[];
710: {
711: static BUF buffer;
712: struct stat stb;
1.18 markus 713: enum {
714: YES, NO, DISPLAYED
715: } wrerr;
1.1 deraadt 716: BUF *bp;
717: off_t i, j;
718: int amt, count, exists, first, mask, mode, ofd, omode;
1.91.2.1! margarid 719: off_t size, statbytes;
1.36 deraadt 720: int setimes, targisdir, wrerrno = 0;
1.1 deraadt 721: char ch, *cp, *np, *targ, *why, *vect[1], buf[2048];
1.40 markus 722: struct timeval tv[2];
1.1 deraadt 723:
1.66 stevesk 724: #define atime tv[0]
725: #define mtime tv[1]
1.75 deraadt 726: #define SCREWUP(str) do { why = str; goto screwup; } while (0)
1.1 deraadt 727:
728: setimes = targisdir = 0;
729: mask = umask(0);
730: if (!pflag)
1.18 markus 731: (void) umask(mask);
1.1 deraadt 732: if (argc != 1) {
733: run_err("ambiguous target");
734: exit(1);
735: }
736: targ = *argv;
737: if (targetshouldbedirectory)
738: verifydir(targ);
1.18 markus 739:
1.29 deraadt 740: (void) atomicio(write, remout, "", 1);
1.1 deraadt 741: if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
742: targisdir = 1;
743: for (first = 1;; first = 0) {
744: cp = buf;
1.30 deraadt 745: if (atomicio(read, remin, cp, 1) <= 0)
1.1 deraadt 746: return;
747: if (*cp++ == '\n')
748: SCREWUP("unexpected <newline>");
749: do {
1.30 deraadt 750: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 751: SCREWUP("lost connection");
752: *cp++ = ch;
753: } while (cp < &buf[sizeof(buf) - 1] && ch != '\n');
754: *cp = 0;
755:
756: if (buf[0] == '\01' || buf[0] == '\02') {
757: if (iamremote == 0)
1.29 deraadt 758: (void) atomicio(write, STDERR_FILENO,
1.44 deraadt 759: buf + 1, strlen(buf + 1));
1.1 deraadt 760: if (buf[0] == '\02')
761: exit(1);
762: ++errs;
763: continue;
764: }
765: if (buf[0] == 'E') {
1.29 deraadt 766: (void) atomicio(write, remout, "", 1);
1.1 deraadt 767: return;
768: }
769: if (ch == '\n')
770: *--cp = 0;
771:
772: cp = buf;
773: if (*cp == 'T') {
774: setimes++;
775: cp++;
1.66 stevesk 776: mtime.tv_sec = strtol(cp, &cp, 10);
777: if (!cp || *cp++ != ' ')
1.1 deraadt 778: SCREWUP("mtime.sec not delimited");
1.66 stevesk 779: mtime.tv_usec = strtol(cp, &cp, 10);
780: if (!cp || *cp++ != ' ')
1.1 deraadt 781: SCREWUP("mtime.usec not delimited");
1.66 stevesk 782: atime.tv_sec = strtol(cp, &cp, 10);
783: if (!cp || *cp++ != ' ')
1.1 deraadt 784: SCREWUP("atime.sec not delimited");
1.66 stevesk 785: atime.tv_usec = strtol(cp, &cp, 10);
786: if (!cp || *cp++ != '\0')
1.1 deraadt 787: SCREWUP("atime.usec not delimited");
1.29 deraadt 788: (void) atomicio(write, remout, "", 1);
1.1 deraadt 789: continue;
790: }
791: if (*cp != 'C' && *cp != 'D') {
792: /*
793: * Check for the case "rcp remote:foo\* local:bar".
794: * In this case, the line "No match." can be returned
795: * by the shell before the rcp command on the remote is
796: * executed so the ^Aerror_message convention isn't
797: * followed.
798: */
799: if (first) {
800: run_err("%s", cp);
801: exit(1);
802: }
803: SCREWUP("expected control record");
804: }
805: mode = 0;
806: for (++cp; cp < buf + 5; cp++) {
807: if (*cp < '0' || *cp > '7')
808: SCREWUP("bad mode");
809: mode = (mode << 3) | (*cp - '0');
810: }
811: if (*cp++ != ' ')
812: SCREWUP("mode not delimited");
813:
1.63 stevesk 814: for (size = 0; isdigit(*cp);)
1.1 deraadt 815: size = size * 10 + (*cp++ - '0');
816: if (*cp++ != ' ')
817: SCREWUP("size not delimited");
818: if (targisdir) {
819: static char *namebuf;
820: static int cursize;
821: size_t need;
822:
823: need = strlen(targ) + strlen(cp) + 250;
1.55 deraadt 824: if (need > cursize) {
1.58 danh 825: if (namebuf)
826: xfree(namebuf);
1.18 markus 827: namebuf = xmalloc(need);
1.55 deraadt 828: cursize = need;
829: }
830: (void) snprintf(namebuf, need, "%s%s%s", targ,
1.88 mouring 831: strcmp(targ, "/") ? "/" : "", cp);
1.1 deraadt 832: np = namebuf;
833: } else
834: np = targ;
1.12 aaron 835: curfile = cp;
1.1 deraadt 836: exists = stat(np, &stb) == 0;
837: if (buf[0] == 'D') {
838: int mod_flag = pflag;
839: if (exists) {
840: if (!S_ISDIR(stb.st_mode)) {
841: errno = ENOTDIR;
842: goto bad;
843: }
844: if (pflag)
1.18 markus 845: (void) chmod(np, mode);
1.1 deraadt 846: } else {
1.18 markus 847: /* Handle copying from a read-only
848: directory */
1.1 deraadt 849: mod_flag = 1;
850: if (mkdir(np, mode | S_IRWXU) < 0)
851: goto bad;
852: }
1.58 danh 853: vect[0] = xstrdup(np);
1.1 deraadt 854: sink(1, vect);
855: if (setimes) {
856: setimes = 0;
1.59 deraadt 857: if (utimes(vect[0], tv) < 0)
1.18 markus 858: run_err("%s: set times: %s",
1.59 deraadt 859: vect[0], strerror(errno));
1.1 deraadt 860: }
861: if (mod_flag)
1.59 deraadt 862: (void) chmod(vect[0], mode);
863: if (vect[0])
864: xfree(vect[0]);
1.1 deraadt 865: continue;
866: }
867: omode = mode;
868: mode |= S_IWRITE;
1.71 markus 869: if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
1.1 deraadt 870: bad: run_err("%s: %s", np, strerror(errno));
871: continue;
872: }
1.29 deraadt 873: (void) atomicio(write, remout, "", 1);
1.1 deraadt 874: if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) {
1.18 markus 875: (void) close(ofd);
1.1 deraadt 876: continue;
877: }
878: cp = bp->buf;
879: wrerr = NO;
1.7 deraadt 880:
1.12 aaron 881: statbytes = 0;
1.91.2.1! margarid 882: if (showprogress)
! 883: start_progress_meter(curfile, size, &statbytes);
1.1 deraadt 884: for (count = i = 0; i < size; i += 4096) {
885: amt = 4096;
886: if (i + amt > size)
887: amt = size - i;
888: count += amt;
889: do {
1.43 markus 890: j = read(remin, cp, amt);
1.78 deraadt 891: if (j == -1 && (errno == EINTR ||
892: errno == EAGAIN)) {
1.43 markus 893: continue;
894: } else if (j <= 0) {
1.1 deraadt 895: run_err("%s", j ? strerror(errno) :
1.63 stevesk 896: "dropped connection");
1.1 deraadt 897: exit(1);
898: }
899: amt -= j;
900: cp += j;
1.18 markus 901: statbytes += j;
1.1 deraadt 902: } while (amt > 0);
1.91.2.1! margarid 903:
! 904: if (limit)
! 905: bwlimit(4096);
! 906:
1.1 deraadt 907: if (count == bp->cnt) {
908: /* Keep reading so we stay sync'd up. */
909: if (wrerr == NO) {
1.30 deraadt 910: j = atomicio(write, ofd, bp->buf, count);
1.1 deraadt 911: if (j != count) {
912: wrerr = YES;
1.18 markus 913: wrerrno = j >= 0 ? EIO : errno;
1.1 deraadt 914: }
915: }
916: count = 0;
917: cp = bp->buf;
918: }
919: }
1.7 deraadt 920: if (showprogress)
1.91.2.1! margarid 921: stop_progress_meter();
1.1 deraadt 922: if (count != 0 && wrerr == NO &&
1.30 deraadt 923: (j = atomicio(write, ofd, bp->buf, count)) != count) {
1.1 deraadt 924: wrerr = YES;
1.18 markus 925: wrerrno = j >= 0 ? EIO : errno;
1.1 deraadt 926: }
1.91.2.1! margarid 927: if (wrerr == NO && ftruncate(ofd, size) != 0) {
1.1 deraadt 928: run_err("%s: truncate: %s", np, strerror(errno));
929: wrerr = DISPLAYED;
930: }
931: if (pflag) {
932: if (exists || omode != mode)
933: if (fchmod(ofd, omode))
934: run_err("%s: set mode: %s",
1.63 stevesk 935: np, strerror(errno));
1.1 deraadt 936: } else {
937: if (!exists && omode != mode)
938: if (fchmod(ofd, omode & ~mask))
939: run_err("%s: set mode: %s",
1.63 stevesk 940: np, strerror(errno));
1.1 deraadt 941: }
1.33 provos 942: if (close(ofd) == -1) {
943: wrerr = YES;
944: wrerrno = errno;
945: }
1.18 markus 946: (void) response();
1.1 deraadt 947: if (setimes && wrerr == NO) {
948: setimes = 0;
1.40 markus 949: if (utimes(np, tv) < 0) {
1.1 deraadt 950: run_err("%s: set times: %s",
1.63 stevesk 951: np, strerror(errno));
1.1 deraadt 952: wrerr = DISPLAYED;
953: }
954: }
1.18 markus 955: switch (wrerr) {
1.1 deraadt 956: case YES:
957: run_err("%s: %s", np, strerror(wrerrno));
958: break;
959: case NO:
1.29 deraadt 960: (void) atomicio(write, remout, "", 1);
1.1 deraadt 961: break;
962: case DISPLAYED:
963: break;
964: }
965: }
966: screwup:
967: run_err("protocol error: %s", why);
968: exit(1);
969: }
970:
971: int
1.86 itojun 972: response(void)
1.1 deraadt 973: {
974: char ch, *cp, resp, rbuf[2048];
975:
1.30 deraadt 976: if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp))
1.1 deraadt 977: lostconn(0);
978:
979: cp = rbuf;
1.18 markus 980: switch (resp) {
981: case 0: /* ok */
1.1 deraadt 982: return (0);
983: default:
984: *cp++ = resp;
985: /* FALLTHROUGH */
1.18 markus 986: case 1: /* error, followed by error msg */
987: case 2: /* fatal error, "" */
1.1 deraadt 988: do {
1.30 deraadt 989: if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1.1 deraadt 990: lostconn(0);
991: *cp++ = ch;
992: } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
993:
994: if (!iamremote)
1.29 deraadt 995: (void) atomicio(write, STDERR_FILENO, rbuf, cp - rbuf);
1.1 deraadt 996: ++errs;
997: if (resp == 1)
998: return (-1);
999: exit(1);
1000: }
1001: /* NOTREACHED */
1002: }
1003:
1004: void
1.86 itojun 1005: usage(void)
1.1 deraadt 1006: {
1.83 stevesk 1007: (void) fprintf(stderr,
1.91.2.1! margarid 1008: "usage: scp [-pqrvBC1246] [-F config] [-S program] [-P port]\n"
! 1009: " [-c cipher] [-i identity] [-l limit] [-o option]\n"
1.90 deraadt 1010: " [[user@]host1:]file1 [...] [[user@]host2:]file2\n");
1.1 deraadt 1011: exit(1);
1012: }
1013:
1014: void
1.18 markus 1015: run_err(const char *fmt,...)
1.1 deraadt 1016: {
1017: static FILE *fp;
1018: va_list ap;
1019:
1020: ++errs;
1021: if (fp == NULL && !(fp = fdopen(remout, "w")))
1022: return;
1.18 markus 1023: (void) fprintf(fp, "%c", 0x01);
1024: (void) fprintf(fp, "scp: ");
1.73 markus 1025: va_start(ap, fmt);
1.18 markus 1026: (void) vfprintf(fp, fmt, ap);
1.73 markus 1027: va_end(ap);
1.18 markus 1028: (void) fprintf(fp, "\n");
1029: (void) fflush(fp);
1030:
1031: if (!iamremote) {
1.73 markus 1032: va_start(ap, fmt);
1.18 markus 1033: vfprintf(stderr, fmt, ap);
1.73 markus 1034: va_end(ap);
1.18 markus 1035: fprintf(stderr, "\n");
1036: }
1.1 deraadt 1037: }
1038:
1039: void
1040: verifydir(cp)
1041: char *cp;
1042: {
1043: struct stat stb;
1044:
1045: if (!stat(cp, &stb)) {
1046: if (S_ISDIR(stb.st_mode))
1047: return;
1048: errno = ENOTDIR;
1049: }
1050: run_err("%s: %s", cp, strerror(errno));
1051: exit(1);
1052: }
1053:
1054: int
1055: okname(cp0)
1056: char *cp0;
1057: {
1058: int c;
1059: char *cp;
1060:
1061: cp = cp0;
1062: do {
1.75 deraadt 1063: c = (int)*cp;
1.1 deraadt 1064: if (c & 0200)
1065: goto bad;
1.91.2.1! margarid 1066: if (!isalpha(c) && !isdigit(c)) {
! 1067: switch (c) {
! 1068: case '\'':
! 1069: case '"':
! 1070: case '`':
! 1071: case ' ':
! 1072: case '#':
! 1073: goto bad;
! 1074: default:
! 1075: break;
! 1076: }
! 1077: }
1.1 deraadt 1078: } while (*++cp);
1079: return (1);
1080:
1.25 markus 1081: bad: fprintf(stderr, "%s: invalid user name\n", cp0);
1.1 deraadt 1082: return (0);
1083: }
1084:
1085: BUF *
1086: allocbuf(bp, fd, blksize)
1087: BUF *bp;
1088: int fd, blksize;
1089: {
1090: size_t size;
1091: struct stat stb;
1092:
1093: if (fstat(fd, &stb) < 0) {
1094: run_err("fstat: %s", strerror(errno));
1095: return (0);
1096: }
1.91.2.1! margarid 1097: size = roundup(stb.st_blksize, blksize);
! 1098: if (size == 0)
1.18 markus 1099: size = blksize;
1.1 deraadt 1100: if (bp->cnt >= size)
1101: return (bp);
1.18 markus 1102: if (bp->buf == NULL)
1103: bp->buf = xmalloc(size);
1104: else
1105: bp->buf = xrealloc(bp->buf, size);
1.81 markus 1106: memset(bp->buf, 0, size);
1.1 deraadt 1107: bp->cnt = size;
1108: return (bp);
1109: }
1110:
1111: void
1112: lostconn(signo)
1113: int signo;
1114: {
1115: if (!iamremote)
1.74 markus 1116: write(STDERR_FILENO, "lost connection\n", 16);
1117: if (signo)
1118: _exit(1);
1119: else
1120: exit(1);
1.4 aaron 1121: }
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