2 Copyright (C) by Andrew Tridgell 1996, 2000
3 Copyright (C) Paul Mackerras 1996
4 Copyright (C) 2001, 2002 by Martin Pool <mbp@samba.org>
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 #define BLOCK_SIZE 700
26 #define RSYNC_RSH_ENV "RSYNC_RSH"
28 #define RSYNC_NAME "rsync"
29 #define RSYNCD_CONF "/etc/rsyncd.conf"
31 #define DEFAULT_LOCK_FILE "/var/run/rsyncd.lock"
32 #define URL_PREFIX "rsync://"
34 #define BACKUP_SUFFIX "~"
36 /* a non-zero CHAR_OFFSET makes the rolling sum stronger, but is
37 incompatible with older versions :-( */
41 #define FLAG_DELETE (1<<0)
42 #define SAME_MODE (1<<1)
43 #define SAME_RDEV (1<<2)
44 #define SAME_UID (1<<3)
45 #define SAME_GID (1<<4)
46 #define SAME_DIR (1<<5)
47 #define SAME_NAME SAME_DIR
48 #define LONG_NAME (1<<6)
49 #define SAME_TIME (1<<7)
51 /* update this if you make incompatible changes */
52 #define PROTOCOL_VERSION 26
54 /* We refuse to interoperate with versions that are not in this range.
55 * Note that we assume we'll work with later versions: the onus is on
56 * people writing them to make sure that they don't send us anything
57 * we won't understand.
59 * There are two possible explanations for the limit at thirty: either
60 * to allow new major-rev versions that do not interoperate with us,
61 * and (more likely) so that we can detect an attempt to connect rsync
62 * to a non-rsync server, which is unlikely to begin by sending a byte
63 * between 15 and 30. */
64 #define MIN_PROTOCOL_VERSION 15
65 #define MAX_PROTOCOL_VERSION 30
67 #define RSYNC_PORT 873
69 #define SPARSE_WRITE_SIZE (1024)
70 #define WRITE_SIZE (32*1024)
71 #define CHUNK_SIZE (32*1024)
72 #define MAX_MAP_SIZE (256*1024)
73 #define IO_BUFFER_SIZE (4092)
79 /* Log values. I *think* what these mean is: FLOG goes to the server
80 * logfile; FERROR and FINFO try to end up on the client, with
81 * different levels of filtering. */
82 enum logcode {FNONE=0, FERROR=1, FINFO=2, FLOG=3 };
88 /* The default RSYNC_RSH is always set in config.h, either to "remsh",
89 * "rsh", or otherwise something specified by the user. HAVE_REMSH
90 * controls parameter munging for HP/UX, etc. */
92 #include <sys/types.h>
100 #ifdef HAVE_SYS_PARAM_H
101 #include <sys/param.h>
108 #ifdef HAVE_SYS_SOCKET_H
109 #include <sys/socket.h>
120 #ifdef TIME_WITH_SYS_TIME
121 #include <sys/time.h>
124 #ifdef HAVE_SYS_TIME_H
125 #include <sys/time.h>
134 #ifdef HAVE_SYS_FCNTL_H
135 #include <sys/fcntl.h>
139 #include <sys/stat.h>
141 #ifdef HAVE_SYS_IOCTL_H
142 #include <sys/ioctl.h>
145 #ifdef HAVE_SYS_FILIO_H
146 #include <sys/filio.h>
150 #ifdef HAVE_SYS_WAIT_H
151 #include <sys/wait.h>
165 #ifdef HAVE_SYS_SELECT_H
166 #include <sys/select.h>
169 #ifdef HAVE_SYS_MODE_H
170 /* apparently AIX needs this for S_ISLNK */
172 #include <sys/mode.h>
179 #include "lib/fnmatch.h"
190 /* these are needed for the uid/gid mapping code */
195 #include <netinet/in.h>
196 #include <arpa/inet.h>
199 #include <sys/file.h>
204 # define dirent direct
206 # include <sys/ndir.h>
209 # include <sys/dir.h>
226 #define uchar unsigned char
229 #if HAVE_UNSIGNED_CHAR
230 #define schar signed char
236 #if (SIZEOF_INT == 4)
238 #elif (SIZEOF_LONG == 4)
240 #elif (SIZEOF_SHORT == 4)
243 /* I hope this works */
250 #define uint32 unsigned int32
254 #define OFF_T off64_t
255 #define STRUCT_STAT struct stat64
258 #define STRUCT_STAT struct stat
262 #define int64 off64_t
263 #elif (SIZEOF_LONG == 8)
265 #elif (SIZEOF_INT == 8)
268 #define int64 long long
270 /* As long as it gets... */
275 /* Starting from protocol version 26, we always use 64-bit
276 * ino_t and dev_t internally, even if this platform does not
277 * allow files to have 64-bit inums. That's because the
278 * receiver needs to find duplicate (dev,ino) tuples to detect
279 * hardlinks, and it might have files coming from a platform
280 * that has 64-bit inums.
282 * The only exception is if we're on a platform with no 64-bit type at
285 * Because we use read_longint() to get these off the wire, if you
286 * transfer devices or hardlinks with dev or inum > 2**32 to a machine
287 * with no 64-bit types then you will get an overflow error. Probably
288 * not many people have that combination of machines, and you can
289 * avoid it by not preserving hardlinks or not transferring device
290 * nodes. It's not clear that any other behaviour is better.
292 * Note that if you transfer devices from a 64-bit-devt machine (say,
293 * Solaris) to a 32-bit-devt machine (say, Linux-2.2/x86) then the
294 * device numbers will be truncated. But it's a kind of silly thing
297 * FIXME: In future, we should probable split the device number into
298 * major/minor, and transfer the two parts as 32-bit ints. That gives
299 * you somewhat more of a chance that they'll come from a big machine
300 * to a little one in a useful way.
302 * FIXME: Really we need an unsigned type, and we perhaps ought to
303 * cope with platforms on which this is an unsigned int or even a
306 #define INO64_T int64
307 #define DEV64_T int64
310 #define MIN(a,b) ((a)<(b)?(a):(b))
314 #define MAX(a,b) ((a)>(b)?(a):(b))
317 #ifndef MAXHOSTNAMELEN
318 #define MAXHOSTNAMELEN 256
321 /* the length of the md4 checksum */
322 #define MD4_SUM_LENGTH 16
323 #define SUM_LENGTH 16
326 #define MAXPATHLEN 1024
330 #define INADDR_NONE 0xffffffff
340 /** Device this file lives upon */
343 /** If this is a device node, the device number. */
355 #define ARENA_SIZE (32 * 1024)
361 struct string_area *next;
367 struct file_struct **files;
368 struct string_area *string_area;
372 OFF_T offset; /* offset in file of this chunk */
373 int len; /* length of chunk of file */
374 int i; /* index of this chunk */
375 uint32 sum1; /* simple checksum */
376 char sum2[SUM_LENGTH]; /* checksum */
380 OFF_T flength; /* total file length */
381 size_t count; /* how many chunks */
382 size_t remainder; /* flength % block_length */
383 size_t n; /* block_length */
384 struct sum_buf *sums; /* points to info for each chunk */
390 OFF_T file_size, p_offset, p_fd_offset;
393 struct exclude_struct {
404 int64 total_transferred_size;
411 int num_transferred_files;
415 /* we need this function because of the silly way in which duplicate
416 entries are handled in the file lists - we can't change this
417 without breaking existing versions */
418 static inline int flist_up(struct file_list *flist, int i)
420 while (!flist->files[i]->basename) i++;
424 #include "byteorder.h"
425 #include "lib/mdfour.h"
426 #include "lib/permstring.h"
427 #include "lib/addrinfo.h"
431 /* We have replacement versions of these if they're missing. */
432 #ifndef HAVE_ASPRINTF
433 int asprintf(char **ptr, const char *format, ...);
436 #ifndef HAVE_VASPRINTF
437 int vasprintf(char **ptr, const char *format, va_list ap);
440 #if !defined(HAVE_VSNPRINTF) && !defined(HAVE_C99_VSNPRINTF)
441 int vsnprintf (char *str, size_t count, const char *fmt, va_list args);
444 #if !defined(HAVE_SNPRINTF) && !defined(HAVE_C99_VSNPRINTF)
445 int snprintf(char *str,size_t count,const char *fmt,...);
450 extern char *sys_errlist[];
451 #define strerror(i) sys_errlist[i]
455 # define strchr index
456 # define strrchr rindex
459 #ifndef HAVE_ERRNO_DECL
463 #define SUPPORT_LINKS HAVE_READLINK
464 #define SUPPORT_HARD_LINKS HAVE_LINK
466 /* This could be bad on systems which have no lchown and where chown
467 * follows symbollic links. On such systems it might be better not to
468 * try to chown symlinks at all. */
473 #define SIGNAL_CAST (RETSIGTYPE (*)())
476 #define EWOULDBLOCK EAGAIN
480 #define STDIN_FILENO 0
483 #ifndef STDOUT_FILENO
484 #define STDOUT_FILENO 1
487 #ifndef STDERR_FILENO
488 #define STDERR_FILENO 2
496 #define _S_IFMT 0170000
500 #define _S_IFLNK 0120000
504 #define S_ISLNK(mode) (((mode) & (_S_IFMT)) == (_S_IFLNK))
508 #define S_ISBLK(mode) (((mode) & (_S_IFMT)) == (_S_IFBLK))
512 #define S_ISCHR(mode) (((mode) & (_S_IFMT)) == (_S_IFCHR))
517 #define S_ISSOCK(mode) (((mode) & (_S_IFMT)) == (_S_IFSOCK))
519 #define S_ISSOCK(mode) (0)
525 #define S_ISFIFO(mode) (((mode) & (_S_IFMT)) == (_S_IFIFO))
527 #define S_ISFIFO(mode) (0)
532 #define S_ISDIR(mode) (((mode) & (_S_IFMT)) == (_S_IFDIR))
536 #define S_ISREG(mode) (((mode) & (_S_IFMT)) == (_S_IFREG))
539 /* work out what fcntl flag to use for non-blocking */
541 # define NONBLOCK_FLAG O_NONBLOCK
543 # define NONBLOCK_FLAG O_NDELAY
545 # define NONBLOCK_FLAG FNDELAY
548 #ifndef INADDR_LOOPBACK
549 #define INADDR_LOOPBACK 0x7f000001
553 #define INADDR_NONE 0xffffffff
556 #define IS_DEVICE(mode) (S_ISCHR(mode) || S_ISBLK(mode) || S_ISSOCK(mode) || S_ISFIFO(mode))
559 #define ACCESSPERMS 0777
561 /* Initial mask on permissions given to temporary files. Mask off setuid
562 bits and group access because of potential race-condition security
563 holes, and mask other access because mode 707 is bizarre */
564 #define INITACCESSPERMS 0700
566 /* handler for null strings in printf format */
567 #define NS(s) ((s)?(s):"<NULL>")
569 #if !defined(__GNUC__) || defined(APPLE)
570 /* Apparently the OS X port of gcc gags on __attribute__.
572 * <http://www.opensource.apple.com/bugs/X/gcc/2512150.html> */
573 #define __attribute__(x)
578 /* use magic gcc attributes to catch format errors */
579 void rprintf(enum logcode , const char *, ...)
580 __attribute__((format (printf, 2, 3)))
583 /* This is just like rprintf, but it also tries to print some
584 * representation of the error code. Normally errcode = errno. */
585 void rsyserr(enum logcode, int, const char *, ...)
586 __attribute__((format (printf, 3, 4)))
589 #ifdef REPLACE_INET_NTOA
590 #define inet_ntoa rep_inet_ntoa
595 size_t strlcpy(char *d, const char *s, size_t bufsize);
599 size_t strlcat(char *d, const char *s, size_t bufsize);
603 #define WEXITSTATUS(stat) ((int)(((stat)>>8)&0xFF))
606 #define exit_cleanup(code) _exit_cleanup(code, __FILE__, __LINE__)
611 #ifndef HAVE_INET_NTOP
613 inet_ntop(int af, const void *src, char *dst, size_t size);
614 #endif /* !HAVE_INET_NTOP */
616 #ifndef HAVE_INET_PTON
617 int isc_net_pton(int af, const char *src, void *dst);
620 #define UNUSED(x) x __attribute__((__unused__))