]> andersk Git - gssapi-openssh.git/blob - openssh/scp.c
o Link dynamically against dependant libraries.
[gssapi-openssh.git] / openssh / scp.c
1 /*
2  * scp - secure remote copy.  This is basically patched BSD rcp which
3  * uses ssh to do the data transfer (instead of using rcmd).
4  *
5  * NOTE: This version should NOT be suid root.  (This uses ssh to
6  * do the transfer and ssh has the necessary privileges.)
7  *
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".
15  */
16 /*
17  * Copyright (c) 1999 Theo de Raadt.  All rights reserved.
18  * Copyright (c) 1999 Aaron Campbell.  All rights reserved.
19  *
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.
28  *
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  */
40
41 /*
42  * Parts from:
43  *
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"
78 RCSID("$OpenBSD: scp.c,v 1.102 2003/03/05 22:33:43 markus Exp $");
79
80 #include "xmalloc.h"
81 #include "atomicio.h"
82 #include "pathnames.h"
83 #include "log.h"
84 #include "misc.h"
85 #include "progressmeter.h"
86
87 #ifdef HAVE___PROGNAME
88 extern char *__progname;
89 #else
90 char *__progname;
91 #endif
92
93 void bwlimit(int);
94
95 /* Struct for addargs */
96 arglist args;
97
98 /* Bandwidth limit */
99 off_t limitbw = 0;
100
101 /* Name of current file being transferred. */
102 char *curfile;
103
104 /* This is set to non-zero to enable verbose mode. */
105 int verbose_mode = 0;
106
107 /* This is set to zero if the progressmeter is not desired. */
108 int showprogress = 1;
109
110 /* This is the program to execute for the secured connection. ("ssh" or -S) */
111 char *ssh_program;
112
113 /* This is used to store the pid of ssh_program */
114 pid_t do_cmd_pid;
115
116 /*
117  * This function executes the given command as the specified user on the
118  * given host.  This returns < 0 if execution fails, and >= 0 otherwise. This
119  * assigns the input and output file descriptors on success.
120  */
121
122 int
123 do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout, int argc)
124 {
125         int pin[2], pout[2], reserved[2];
126
127         if (verbose_mode)
128                 fprintf(stderr,
129                     "Executing: program %s host %s, user %s, command %s\n",
130                     ssh_program, host,
131                     remuser ? remuser : "(unspecified)", cmd);
132
133         /*
134          * Reserve two descriptors so that the real pipes won't get
135          * descriptors 0 and 1 because that will screw up dup2 below.
136          */
137         pipe(reserved);
138
139         /* Create a socket pair for communicating with ssh. */
140         if (pipe(pin) < 0)
141                 fatal("pipe: %s", strerror(errno));
142         if (pipe(pout) < 0)
143                 fatal("pipe: %s", strerror(errno));
144
145         /* Free the reserved descriptors. */
146         close(reserved[0]);
147         close(reserved[1]);
148
149         /* For a child to execute the command on the remote host using ssh. */
150         do_cmd_pid = fork();
151         if (do_cmd_pid == 0) {
152                 /* Child. */
153                 close(pin[1]);
154                 close(pout[0]);
155                 dup2(pin[0], 0);
156                 dup2(pout[1], 1);
157                 close(pin[0]);
158                 close(pout[1]);
159
160                 args.list[0] = ssh_program;
161                 if (remuser != NULL)
162                         addargs(&args, "-l%s", remuser);
163                 addargs(&args, "%s", host);
164                 addargs(&args, "%s", cmd);
165
166                 execvp(ssh_program, args.list);
167                 perror(ssh_program);
168                 exit(1);
169         } else if (do_cmd_pid == -1) {
170                 fatal("fork: %s", strerror(errno));
171         }
172         /* Parent.  Close the other side, and return the local side. */
173         close(pin[0]);
174         *fdout = pin[1];
175         close(pout[1]);
176         *fdin = pout[0];
177         return 0;
178 }
179
180 typedef struct {
181         int cnt;
182         char *buf;
183 } BUF;
184
185 BUF *allocbuf(BUF *, int, int);
186 void lostconn(int);
187 void nospace(void);
188 int okname(char *);
189 void run_err(const char *,...);
190 void verifydir(char *);
191
192 struct passwd *pwd;
193 uid_t userid;
194 int errs, remin, remout;
195 int pflag, iamremote, iamrecursive, targetshouldbedirectory;
196
197 #define CMDNEEDS        64
198 char cmd[CMDNEEDS];             /* must hold "rcp -r -p -d\0" */
199
200 int response(void);
201 void rsource(char *, struct stat *);
202 void sink(int, char *[]);
203 void source(int, char *[]);
204 void tolocal(int, char *[]);
205 void toremote(char *, int, char *[]);
206 void usage(void);
207
208 int
209 main(argc, argv)
210         int argc;
211         char *argv[];
212 {
213         int ch, fflag, tflag, status;
214         double speed;
215         char *targ, *endp;
216         extern char *optarg;
217         extern int optind;
218
219         __progname = get_progname(argv[0]);
220         init_pathnames();
221         ssh_program = _PATH_SSH_PROGRAM;
222
223         args.list = NULL;
224         addargs(&args, "ssh");          /* overwritten with ssh_program */
225         addargs(&args, "-x");
226         addargs(&args, "-oForwardAgent no");
227         addargs(&args, "-oClearAllForwardings yes");
228
229         fflag = tflag = 0;
230         while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q1246S:o:F:")) != -1)
231                 switch (ch) {
232                 /* User-visible flags. */
233                 case '1':
234                 case '2':
235                 case '4':
236                 case '6':
237                 case 'C':
238                         addargs(&args, "-%c", ch);
239                         break;
240                 case 'o':
241                 case 'c':
242                 case 'i':
243                 case 'F':
244                         addargs(&args, "-%c%s", ch, optarg);
245                         break;
246                 case 'P':
247                         addargs(&args, "-p%s", optarg);
248                         break;
249                 case 'B':
250                         addargs(&args, "-oBatchmode yes");
251                         break;
252                 case 'l':
253                         speed = strtod(optarg, &endp);
254                         if (speed <= 0 || *endp != '\0')
255                                 usage();
256                         limitbw = speed * 1024;
257                         break;
258                 case 'p':
259                         pflag = 1;
260                         break;
261                 case 'r':
262                         iamrecursive = 1;
263                         break;
264                 case 'S':
265                         ssh_program = xstrdup(optarg);
266                         break;
267                 case 'v':
268                         addargs(&args, "-v");
269                         verbose_mode = 1;
270                         break;
271                 case 'q':
272                         showprogress = 0;
273                         break;
274
275                 /* Server options. */
276                 case 'd':
277                         targetshouldbedirectory = 1;
278                         break;
279                 case 'f':       /* "from" */
280                         iamremote = 1;
281                         fflag = 1;
282                         break;
283                 case 't':       /* "to" */
284                         iamremote = 1;
285                         tflag = 1;
286 #ifdef HAVE_CYGWIN
287                         setmode(0, O_BINARY);
288 #endif
289                         break;
290                 default:
291                         usage();
292                 }
293         argc -= optind;
294         argv += optind;
295
296         if ((pwd = getpwuid(userid = getuid())) == NULL)
297                 fatal("unknown user %d", (int) userid);
298
299         if (!isatty(STDERR_FILENO))
300                 showprogress = 0;
301
302         remin = STDIN_FILENO;
303         remout = STDOUT_FILENO;
304
305         if (fflag) {
306                 /* Follow "protocol", send data. */
307                 (void) response();
308                 source(argc, argv);
309                 exit(errs != 0);
310         }
311         if (tflag) {
312                 /* Receive data. */
313                 sink(argc, argv);
314                 exit(errs != 0);
315         }
316         if (argc < 2)
317                 usage();
318         if (argc > 2)
319                 targetshouldbedirectory = 1;
320
321         remin = remout = -1;
322         do_cmd_pid = -1;
323         /* Command to be executed on remote system using "ssh". */
324         (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
325             verbose_mode ? " -v" : "",
326             iamrecursive ? " -r" : "", pflag ? " -p" : "",
327             targetshouldbedirectory ? " -d" : "");
328
329         (void) signal(SIGPIPE, lostconn);
330
331         if ((targ = colon(argv[argc - 1])))     /* Dest is remote host. */
332                 toremote(targ, argc, argv);
333         else {
334                 tolocal(argc, argv);    /* Dest is local host. */
335                 if (targetshouldbedirectory)
336                         verifydir(argv[argc - 1]);
337         }
338         /*
339          * Finally check the exit status of the ssh process, if one was forked
340          * and no error has occured yet
341          */
342         if (do_cmd_pid != -1 && errs == 0) {
343                 if (remin != -1)
344                     (void) close(remin);
345                 if (remout != -1)
346                     (void) close(remout);
347                 if (waitpid(do_cmd_pid, &status, 0) == -1)
348                         errs = 1;
349                 else {
350                         if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
351                                 errs = 1;
352                 }
353         }
354         exit(errs != 0);
355 }
356
357 void
358 toremote(targ, argc, argv)
359         char *targ, *argv[];
360         int argc;
361 {
362         int i, len;
363         char *bp, *host, *src, *suser, *thost, *tuser;
364
365         *targ++ = 0;
366         if (*targ == 0)
367                 targ = ".";
368
369         if ((thost = strrchr(argv[argc - 1], '@'))) {
370                 /* user@host */
371                 *thost++ = 0;
372                 tuser = argv[argc - 1];
373                 if (*tuser == '\0')
374                         tuser = NULL;
375         } else {
376                 thost = argv[argc - 1];
377                 tuser = NULL;
378         }
379
380         for (i = 0; i < argc - 1; i++) {
381                 src = colon(argv[i]);
382                 if (src) {      /* remote to remote */
383                         static char *ssh_options =
384                             "-x -o'ClearAllForwardings yes'";
385                         *src++ = 0;
386                         if (*src == 0)
387                                 src = ".";
388                         host = strrchr(argv[i], '@');
389                         len = strlen(ssh_program) + strlen(argv[i]) +
390                             strlen(src) + (tuser ? strlen(tuser) : 0) +
391                             strlen(thost) + strlen(targ) +
392                             strlen(ssh_options) + CMDNEEDS + 20;
393                         bp = xmalloc(len);
394                         if (host) {
395                                 *host++ = 0;
396                                 host = cleanhostname(host);
397                                 suser = argv[i];
398                                 if (*suser == '\0')
399                                         suser = pwd->pw_name;
400                                 else if (!okname(suser)) {
401                                         xfree(bp);
402                                         continue;
403                                 }
404                                 if (tuser && !okname(tuser)) {
405                                         xfree(bp);
406                                         continue;
407                                 }
408                                 snprintf(bp, len,
409                                     "%s%s %s -n "
410                                     "-l %s %s %s %s '%s%s%s:%s'",
411                                     ssh_program, verbose_mode ? " -v" : "",
412                                     ssh_options, suser, host, cmd, src,
413                                     tuser ? tuser : "", tuser ? "@" : "",
414                                     thost, targ);
415                         } else {
416                                 host = cleanhostname(argv[i]);
417                                 snprintf(bp, len,
418                                     "exec %s%s %s -n %s "
419                                     "%s %s '%s%s%s:%s'",
420                                     ssh_program, verbose_mode ? " -v" : "",
421                                     ssh_options, host, cmd, src,
422                                     tuser ? tuser : "", tuser ? "@" : "",
423                                     thost, targ);
424                         }
425                         if (verbose_mode)
426                                 fprintf(stderr, "Executing: %s\n", bp);
427                         (void) system(bp);
428                         (void) xfree(bp);
429                 } else {        /* local to remote */
430                         if (remin == -1) {
431                                 len = strlen(targ) + CMDNEEDS + 20;
432                                 bp = xmalloc(len);
433                                 (void) snprintf(bp, len, "%s -t %s", cmd, targ);
434                                 host = cleanhostname(thost);
435                                 if (do_cmd(host, tuser, bp, &remin,
436                                     &remout, argc) < 0)
437                                         exit(1);
438                                 if (response() < 0)
439                                         exit(1);
440                                 (void) xfree(bp);
441                         }
442                         source(1, argv + i);
443                 }
444         }
445 }
446
447 void
448 tolocal(argc, argv)
449         int argc;
450         char *argv[];
451 {
452         int i, len;
453         char *bp, *host, *src, *suser;
454
455         for (i = 0; i < argc - 1; i++) {
456                 if (!(src = colon(argv[i]))) {  /* Local to local. */
457                         len = strlen(_PATH_CP) + strlen(argv[i]) +
458                             strlen(argv[argc - 1]) + 20;
459                         bp = xmalloc(len);
460                         (void) snprintf(bp, len, "exec %s%s%s %s %s", _PATH_CP,
461                             iamrecursive ? " -r" : "", pflag ? " -p" : "",
462                             argv[i], argv[argc - 1]);
463                         if (verbose_mode)
464                                 fprintf(stderr, "Executing: %s\n", bp);
465                         if (system(bp))
466                                 ++errs;
467                         (void) xfree(bp);
468                         continue;
469                 }
470                 *src++ = 0;
471                 if (*src == 0)
472                         src = ".";
473                 if ((host = strrchr(argv[i], '@')) == NULL) {
474                         host = argv[i];
475                         suser = NULL;
476                 } else {
477                         *host++ = 0;
478                         suser = argv[i];
479                         if (*suser == '\0')
480                                 suser = pwd->pw_name;
481                 }
482                 host = cleanhostname(host);
483                 len = strlen(src) + CMDNEEDS + 20;
484                 bp = xmalloc(len);
485                 (void) snprintf(bp, len, "%s -f %s", cmd, src);
486                 if (do_cmd(host, suser, bp, &remin, &remout, argc) < 0) {
487                         (void) xfree(bp);
488                         ++errs;
489                         continue;
490                 }
491                 xfree(bp);
492                 sink(1, argv + argc - 1);
493                 (void) close(remin);
494                 remin = remout = -1;
495         }
496 }
497
498 void
499 source(argc, argv)
500         int argc;
501         char *argv[];
502 {
503         struct stat stb;
504         static BUF buffer;
505         BUF *bp;
506         off_t i, amt, result, statbytes;
507         int fd, haderr, indx;
508         char *last, *name, buf[2048];
509         int len;
510
511         for (indx = 0; indx < argc; ++indx) {
512                 name = argv[indx];
513                 statbytes = 0;
514                 len = strlen(name);
515                 while (len > 1 && name[len-1] == '/')
516                         name[--len] = '\0';
517                 if (strchr(name, '\n') != NULL) {
518                         run_err("%s: skipping, filename contains a newline",
519                             name);
520                         goto next;
521                 }
522                 if ((fd = open(name, O_RDONLY, 0)) < 0)
523                         goto syserr;
524                 if (fstat(fd, &stb) < 0) {
525 syserr:                 run_err("%s: %s", name, strerror(errno));
526                         goto next;
527                 }
528                 switch (stb.st_mode & S_IFMT) {
529                 case S_IFREG:
530                         break;
531                 case S_IFDIR:
532                         if (iamrecursive) {
533                                 rsource(name, &stb);
534                                 goto next;
535                         }
536                         /* FALLTHROUGH */
537                 default:
538                         run_err("%s: not a regular file", name);
539                         goto next;
540                 }
541                 if ((last = strrchr(name, '/')) == NULL)
542                         last = name;
543                 else
544                         ++last;
545                 curfile = last;
546                 if (pflag) {
547                         /*
548                          * Make it compatible with possible future
549                          * versions expecting microseconds.
550                          */
551                         (void) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n",
552                             (u_long) stb.st_mtime,
553                             (u_long) stb.st_atime);
554                         (void) atomicio(write, remout, buf, strlen(buf));
555                         if (response() < 0)
556                                 goto next;
557                 }
558 #define FILEMODEMASK    (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
559 #ifdef HAVE_LONG_LONG_INT
560                 snprintf(buf, sizeof buf, "C%04o %lld %s\n",
561                     (u_int) (stb.st_mode & FILEMODEMASK),
562                     (long long)stb.st_size, last);
563 #else
564                 /* XXX: Handle integer overflow? */
565                 snprintf(buf, sizeof buf, "C%04o %lu %s\n",
566                     (u_int) (stb.st_mode & FILEMODEMASK),
567                     (u_long) stb.st_size, last);
568 #endif
569                 if (verbose_mode) {
570                         fprintf(stderr, "Sending file modes: %s", buf);
571                 }
572                 (void) atomicio(write, remout, buf, strlen(buf));
573                 if (response() < 0)
574                         goto next;
575                 if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) {
576 next:                   (void) close(fd);
577                         continue;
578                 }
579                 if (showprogress)
580                         start_progress_meter(curfile, stb.st_size, &statbytes);
581                 /* Keep writing after an error so that we stay sync'd up. */
582                 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
583                         amt = bp->cnt;
584                         if (i + amt > stb.st_size)
585                                 amt = stb.st_size - i;
586                         if (!haderr) {
587                                 result = atomicio(read, fd, bp->buf, amt);
588                                 if (result != amt)
589                                         haderr = result >= 0 ? EIO : errno;
590                         }
591                         if (haderr)
592                                 (void) atomicio(write, remout, bp->buf, amt);
593                         else {
594                                 result = atomicio(write, remout, bp->buf, amt);
595                                 if (result != amt)
596                                         haderr = result >= 0 ? EIO : errno;
597                                 statbytes += result;
598                         }
599                         if (limitbw)
600                                 bwlimit(amt);
601                 }
602                 if (showprogress)
603                         stop_progress_meter();
604
605                 if (close(fd) < 0 && !haderr)
606                         haderr = errno;
607                 if (!haderr)
608                         (void) atomicio(write, remout, "", 1);
609                 else
610                         run_err("%s: %s", name, strerror(haderr));
611                 (void) response();
612         }
613 }
614
615 void
616 rsource(name, statp)
617         char *name;
618         struct stat *statp;
619 {
620         DIR *dirp;
621         struct dirent *dp;
622         char *last, *vect[1], path[1100];
623
624         if (!(dirp = opendir(name))) {
625                 run_err("%s: %s", name, strerror(errno));
626                 return;
627         }
628         last = strrchr(name, '/');
629         if (last == 0)
630                 last = name;
631         else
632                 last++;
633         if (pflag) {
634                 (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n",
635                     (u_long) statp->st_mtime,
636                     (u_long) statp->st_atime);
637                 (void) atomicio(write, remout, path, strlen(path));
638                 if (response() < 0) {
639                         closedir(dirp);
640                         return;
641                 }
642         }
643         (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n",
644             (u_int) (statp->st_mode & FILEMODEMASK), 0, last);
645         if (verbose_mode)
646                 fprintf(stderr, "Entering directory: %s", path);
647         (void) atomicio(write, remout, path, strlen(path));
648         if (response() < 0) {
649                 closedir(dirp);
650                 return;
651         }
652         while ((dp = readdir(dirp)) != NULL) {
653                 if (dp->d_ino == 0)
654                         continue;
655                 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
656                         continue;
657                 if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) {
658                         run_err("%s/%s: name too long", name, dp->d_name);
659                         continue;
660                 }
661                 (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name);
662                 vect[0] = path;
663                 source(1, vect);
664         }
665         (void) closedir(dirp);
666         (void) atomicio(write, remout, "E\n", 2);
667         (void) response();
668 }
669
670 void
671 bwlimit(int amount)
672 {
673         static struct timeval bwstart, bwend;
674         static int lamt, thresh = 16384;
675         u_int64_t wait;
676         struct timespec ts, rm;
677
678         if (!timerisset(&bwstart)) {
679                 gettimeofday(&bwstart, NULL);
680                 return;
681         }
682
683         lamt += amount;
684         if (lamt < thresh)
685                 return;
686
687         gettimeofday(&bwend, NULL);
688         timersub(&bwend, &bwstart, &bwend);
689         if (!timerisset(&bwend))
690                 return;
691
692         lamt *= 8;
693         wait = (double)1000000L * lamt / limitbw;
694
695         bwstart.tv_sec = wait / 1000000L;
696         bwstart.tv_usec = wait % 1000000L;
697
698         if (timercmp(&bwstart, &bwend, >)) {
699                 timersub(&bwstart, &bwend, &bwend);
700
701                 /* Adjust the wait time */
702                 if (bwend.tv_sec) {
703                         thresh /= 2;
704                         if (thresh < 2048)
705                                 thresh = 2048;
706                 } else if (bwend.tv_usec < 100) {
707                         thresh *= 2;
708                         if (thresh > 32768)
709                                 thresh = 32768;
710                 }
711
712                 TIMEVAL_TO_TIMESPEC(&bwend, &ts);
713                 while (nanosleep(&ts, &rm) == -1) {
714                         if (errno != EINTR)
715                                 break;
716                         ts = rm;
717                 }
718         }
719
720         lamt = 0;
721         gettimeofday(&bwstart, NULL);
722 }
723
724 void
725 sink(argc, argv)
726         int argc;
727         char *argv[];
728 {
729         static BUF buffer;
730         struct stat stb;
731         enum {
732                 YES, NO, DISPLAYED
733         } wrerr;
734         BUF *bp;
735         off_t i, j;
736         int amt, count, exists, first, mask, mode, ofd, omode;
737         off_t size, statbytes;
738         int setimes, targisdir, wrerrno = 0;
739         char ch, *cp, *np, *targ, *why, *vect[1], buf[2048];
740         struct timeval tv[2];
741
742 #define atime   tv[0]
743 #define mtime   tv[1]
744 #define SCREWUP(str)    do { why = str; goto screwup; } while (0)
745
746         setimes = targisdir = 0;
747         mask = umask(0);
748         if (!pflag)
749                 (void) umask(mask);
750         if (argc != 1) {
751                 run_err("ambiguous target");
752                 exit(1);
753         }
754         targ = *argv;
755         if (targetshouldbedirectory)
756                 verifydir(targ);
757
758         (void) atomicio(write, remout, "", 1);
759         if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
760                 targisdir = 1;
761         for (first = 1;; first = 0) {
762                 cp = buf;
763                 if (atomicio(read, remin, cp, 1) <= 0)
764                         return;
765                 if (*cp++ == '\n')
766                         SCREWUP("unexpected <newline>");
767                 do {
768                         if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
769                                 SCREWUP("lost connection");
770                         *cp++ = ch;
771                 } while (cp < &buf[sizeof(buf) - 1] && ch != '\n');
772                 *cp = 0;
773
774                 if (buf[0] == '\01' || buf[0] == '\02') {
775                         if (iamremote == 0)
776                                 (void) atomicio(write, STDERR_FILENO,
777                                     buf + 1, strlen(buf + 1));
778                         if (buf[0] == '\02')
779                                 exit(1);
780                         ++errs;
781                         continue;
782                 }
783                 if (buf[0] == 'E') {
784                         (void) atomicio(write, remout, "", 1);
785                         return;
786                 }
787                 if (ch == '\n')
788                         *--cp = 0;
789
790                 cp = buf;
791                 if (*cp == 'T') {
792                         setimes++;
793                         cp++;
794                         mtime.tv_sec = strtol(cp, &cp, 10);
795                         if (!cp || *cp++ != ' ')
796                                 SCREWUP("mtime.sec not delimited");
797                         mtime.tv_usec = strtol(cp, &cp, 10);
798                         if (!cp || *cp++ != ' ')
799                                 SCREWUP("mtime.usec not delimited");
800                         atime.tv_sec = strtol(cp, &cp, 10);
801                         if (!cp || *cp++ != ' ')
802                                 SCREWUP("atime.sec not delimited");
803                         atime.tv_usec = strtol(cp, &cp, 10);
804                         if (!cp || *cp++ != '\0')
805                                 SCREWUP("atime.usec not delimited");
806                         (void) atomicio(write, remout, "", 1);
807                         continue;
808                 }
809                 if (*cp != 'C' && *cp != 'D') {
810                         /*
811                          * Check for the case "rcp remote:foo\* local:bar".
812                          * In this case, the line "No match." can be returned
813                          * by the shell before the rcp command on the remote is
814                          * executed so the ^Aerror_message convention isn't
815                          * followed.
816                          */
817                         if (first) {
818                                 run_err("%s", cp);
819                                 exit(1);
820                         }
821                         SCREWUP("expected control record");
822                 }
823                 mode = 0;
824                 for (++cp; cp < buf + 5; cp++) {
825                         if (*cp < '0' || *cp > '7')
826                                 SCREWUP("bad mode");
827                         mode = (mode << 3) | (*cp - '0');
828                 }
829                 if (*cp++ != ' ')
830                         SCREWUP("mode not delimited");
831
832                 for (size = 0; isdigit(*cp);)
833                         size = size * 10 + (*cp++ - '0');
834                 if (*cp++ != ' ')
835                         SCREWUP("size not delimited");
836                 if (targisdir) {
837                         static char *namebuf;
838                         static int cursize;
839                         size_t need;
840
841                         need = strlen(targ) + strlen(cp) + 250;
842                         if (need > cursize) {
843                                 if (namebuf)
844                                         xfree(namebuf);
845                                 namebuf = xmalloc(need);
846                                 cursize = need;
847                         }
848                         (void) snprintf(namebuf, need, "%s%s%s", targ,
849                             strcmp(targ, "/") ? "/" : "", cp);
850                         np = namebuf;
851                 } else
852                         np = targ;
853                 curfile = cp;
854                 exists = stat(np, &stb) == 0;
855                 if (buf[0] == 'D') {
856                         int mod_flag = pflag;
857                         if (exists) {
858                                 if (!S_ISDIR(stb.st_mode)) {
859                                         errno = ENOTDIR;
860                                         goto bad;
861                                 }
862                                 if (pflag)
863                                         (void) chmod(np, mode);
864                         } else {
865                                 /* Handle copying from a read-only
866                                    directory */
867                                 mod_flag = 1;
868                                 if (mkdir(np, mode | S_IRWXU) < 0)
869                                         goto bad;
870                         }
871                         vect[0] = xstrdup(np);
872                         sink(1, vect);
873                         if (setimes) {
874                                 setimes = 0;
875                                 if (utimes(vect[0], tv) < 0)
876                                         run_err("%s: set times: %s",
877                                             vect[0], strerror(errno));
878                         }
879                         if (mod_flag)
880                                 (void) chmod(vect[0], mode);
881                         if (vect[0])
882                                 xfree(vect[0]);
883                         continue;
884                 }
885                 omode = mode;
886                 mode |= S_IWRITE;
887                 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
888 bad:                    run_err("%s: %s", np, strerror(errno));
889                         continue;
890                 }
891                 (void) atomicio(write, remout, "", 1);
892                 if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) {
893                         (void) close(ofd);
894                         continue;
895                 }
896                 cp = bp->buf;
897                 wrerr = NO;
898
899                 statbytes = 0;
900                 if (showprogress)
901                         start_progress_meter(curfile, size, &statbytes);
902                 for (count = i = 0; i < size; i += 4096) {
903                         amt = 4096;
904                         if (i + amt > size)
905                                 amt = size - i;
906                         count += amt;
907                         do {
908                                 j = read(remin, cp, amt);
909                                 if (j == -1 && (errno == EINTR ||
910                                     errno == EAGAIN)) {
911                                         continue;
912                                 } else if (j <= 0) {
913                                         run_err("%s", j ? strerror(errno) :
914                                             "dropped connection");
915                                         exit(1);
916                                 }
917                                 amt -= j;
918                                 cp += j;
919                                 statbytes += j;
920                         } while (amt > 0);
921                 
922                         if (limitbw)
923                                 bwlimit(4096);
924
925                         if (count == bp->cnt) {
926                                 /* Keep reading so we stay sync'd up. */
927                                 if (wrerr == NO) {
928                                         j = atomicio(write, ofd, bp->buf, count);
929                                         if (j != count) {
930                                                 wrerr = YES;
931                                                 wrerrno = j >= 0 ? EIO : errno;
932                                         }
933                                 }
934                                 count = 0;
935                                 cp = bp->buf;
936                         }
937                 }
938                 if (showprogress)
939                         stop_progress_meter();
940                 if (count != 0 && wrerr == NO &&
941                     (j = atomicio(write, ofd, bp->buf, count)) != count) {
942                         wrerr = YES;
943                         wrerrno = j >= 0 ? EIO : errno;
944                 }
945                 if (wrerr == NO && ftruncate(ofd, size) != 0) {
946                         run_err("%s: truncate: %s", np, strerror(errno));
947                         wrerr = DISPLAYED;
948                 }
949                 if (pflag) {
950                         if (exists || omode != mode)
951 #ifdef HAVE_FCHMOD
952                                 if (fchmod(ofd, omode))
953 #else /* HAVE_FCHMOD */
954                                 if (chmod(np, omode))
955 #endif /* HAVE_FCHMOD */
956                                         run_err("%s: set mode: %s",
957                                             np, strerror(errno));
958                 } else {
959                         if (!exists && omode != mode)
960 #ifdef HAVE_FCHMOD
961                                 if (fchmod(ofd, omode & ~mask))
962 #else /* HAVE_FCHMOD */
963                                 if (chmod(np, omode & ~mask))
964 #endif /* HAVE_FCHMOD */
965                                         run_err("%s: set mode: %s",
966                                             np, strerror(errno));
967                 }
968                 if (close(ofd) == -1) {
969                         wrerr = YES;
970                         wrerrno = errno;
971                 }
972                 (void) response();
973                 if (setimes && wrerr == NO) {
974                         setimes = 0;
975                         if (utimes(np, tv) < 0) {
976                                 run_err("%s: set times: %s",
977                                     np, strerror(errno));
978                                 wrerr = DISPLAYED;
979                         }
980                 }
981                 switch (wrerr) {
982                 case YES:
983                         run_err("%s: %s", np, strerror(wrerrno));
984                         break;
985                 case NO:
986                         (void) atomicio(write, remout, "", 1);
987                         break;
988                 case DISPLAYED:
989                         break;
990                 }
991         }
992 screwup:
993         run_err("protocol error: %s", why);
994         exit(1);
995 }
996
997 int
998 response(void)
999 {
1000         char ch, *cp, resp, rbuf[2048];
1001
1002         if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp))
1003                 lostconn(0);
1004
1005         cp = rbuf;
1006         switch (resp) {
1007         case 0:         /* ok */
1008                 return (0);
1009         default:
1010                 *cp++ = resp;
1011                 /* FALLTHROUGH */
1012         case 1:         /* error, followed by error msg */
1013         case 2:         /* fatal error, "" */
1014                 do {
1015                         if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1016                                 lostconn(0);
1017                         *cp++ = ch;
1018                 } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
1019
1020                 if (!iamremote)
1021                         (void) atomicio(write, STDERR_FILENO, rbuf, cp - rbuf);
1022                 ++errs;
1023                 if (resp == 1)
1024                         return (-1);
1025                 exit(1);
1026         }
1027         /* NOTREACHED */
1028 }
1029
1030 void
1031 usage(void)
1032 {
1033         (void) fprintf(stderr,
1034             "usage: scp [-pqrvBC1246] [-F config] [-S program] [-P port]\n"
1035             "           [-c cipher] [-i identity] [-l limit] [-o option]\n"
1036             "           [[user@]host1:]file1 [...] [[user@]host2:]file2\n");
1037         exit(1);
1038 }
1039
1040 void
1041 run_err(const char *fmt,...)
1042 {
1043         static FILE *fp;
1044         va_list ap;
1045
1046         ++errs;
1047         if (fp == NULL && !(fp = fdopen(remout, "w")))
1048                 return;
1049         (void) fprintf(fp, "%c", 0x01);
1050         (void) fprintf(fp, "scp: ");
1051         va_start(ap, fmt);
1052         (void) vfprintf(fp, fmt, ap);
1053         va_end(ap);
1054         (void) fprintf(fp, "\n");
1055         (void) fflush(fp);
1056
1057         if (!iamremote) {
1058                 va_start(ap, fmt);
1059                 vfprintf(stderr, fmt, ap);
1060                 va_end(ap);
1061                 fprintf(stderr, "\n");
1062         }
1063 }
1064
1065 void
1066 verifydir(cp)
1067         char *cp;
1068 {
1069         struct stat stb;
1070
1071         if (!stat(cp, &stb)) {
1072                 if (S_ISDIR(stb.st_mode))
1073                         return;
1074                 errno = ENOTDIR;
1075         }
1076         run_err("%s: %s", cp, strerror(errno));
1077         exit(1);
1078 }
1079
1080 int
1081 okname(cp0)
1082         char *cp0;
1083 {
1084         int c;
1085         char *cp;
1086
1087         cp = cp0;
1088         do {
1089                 c = (int)*cp;
1090                 if (c & 0200)
1091                         goto bad;
1092                 if (!isalpha(c) && !isdigit(c)) {
1093                         switch (c) {
1094                         case '\'':
1095                         case '"':
1096                         case '`':
1097                         case ' ':
1098                         case '#':
1099                                 goto bad;
1100                         default:
1101                                 break;
1102                         }
1103                 }
1104         } while (*++cp);
1105         return (1);
1106
1107 bad:    fprintf(stderr, "%s: invalid user name\n", cp0);
1108         return (0);
1109 }
1110
1111 BUF *
1112 allocbuf(bp, fd, blksize)
1113         BUF *bp;
1114         int fd, blksize;
1115 {
1116         size_t size;
1117 #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
1118         struct stat stb;
1119
1120         if (fstat(fd, &stb) < 0) {
1121                 run_err("fstat: %s", strerror(errno));
1122                 return (0);
1123         }
1124         size = roundup(stb.st_blksize, blksize);
1125         if (size == 0)
1126                 size = blksize;
1127 #else /* HAVE_STRUCT_STAT_ST_BLKSIZE */
1128         size = blksize;
1129 #endif /* HAVE_STRUCT_STAT_ST_BLKSIZE */
1130         if (bp->cnt >= size)
1131                 return (bp);
1132         if (bp->buf == NULL)
1133                 bp->buf = xmalloc(size);
1134         else
1135                 bp->buf = xrealloc(bp->buf, size);
1136         memset(bp->buf, 0, size);
1137         bp->cnt = size;
1138         return (bp);
1139 }
1140
1141 void
1142 lostconn(signo)
1143         int signo;
1144 {
1145         if (!iamremote)
1146                 write(STDERR_FILENO, "lost connection\n", 16);
1147         if (signo)
1148                 _exit(1);
1149         else
1150                 exit(1);
1151 }
This page took 0.13742 seconds and 5 git commands to generate.