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_SYSCONF "/etc/rsyncd.conf"
30 #define RSYNCD_USERCONF "rsyncd.conf"
32 #define DEFAULT_LOCK_FILE "/var/run/rsyncd.lock"
33 #define URL_PREFIX "rsync://"
35 #define BACKUP_SUFFIX "~"
37 /* a non-zero CHAR_OFFSET makes the rolling sum stronger, but is
38 incompatible with older versions :-( */
42 #define FLAG_DELETE (1<<0)
43 #define SAME_MODE (1<<1)
44 #define SAME_RDEV (1<<2)
45 #define SAME_UID (1<<3)
46 #define SAME_GID (1<<4)
47 #define SAME_DIR (1<<5)
48 #define SAME_NAME SAME_DIR
49 #define LONG_NAME (1<<6)
50 #define SAME_TIME (1<<7)
52 /* update this if you make incompatible changes */
53 #define PROTOCOL_VERSION 27
55 /* We refuse to interoperate with versions that are not in this range.
56 * Note that we assume we'll work with later versions: the onus is on
57 * people writing them to make sure that they don't send us anything
58 * we won't understand.
60 * Interoperation with old but supported protocol versions
61 * should cause a warning to be printed. At a future date
62 * the old protocol will become the minimum and
63 * compatibility code removed.
65 * There are two possible explanations for the limit at
66 * MAX_PROTOCOL_VERSION: either to allow new major-rev versions that
67 * do not interoperate with us, and (more likely) so that we can
68 * detect an attempt to connect rsync to a non-rsync server, which is
69 * unlikely to begin by sending a byte between MIN_PROTOCL_VERSION and
70 * MAX_PROTOCOL_VERSION. */
72 #define MIN_PROTOCOL_VERSION 17
73 #define OLD_PROTOCOL_VERSION 20
74 #define MAX_PROTOCOL_VERSION 40
76 #define RSYNC_PORT 873
78 #define SPARSE_WRITE_SIZE (1024)
79 #define WRITE_SIZE (32*1024)
80 #define CHUNK_SIZE (32*1024)
81 #define MAX_MAP_SIZE (256*1024)
82 #define IO_BUFFER_SIZE (4092)
84 #define IOERR_GENERAL (1<<0) /* For backward compatibility, this must == 1 */
85 #define IOERR_VANISHED (1<<1)
92 #define SERVER_EXCLUDES 1
93 #define ALL_EXCLUDES 2
96 #define MISSING_FATAL 1
101 /* Log values. I *think* what these mean is: FLOG goes to the server
102 * logfile; FERROR and FINFO try to end up on the client, with
103 * different levels of filtering. */
104 enum logcode {FNONE=0, FERROR=1, FINFO=2, FLOG=3 };
110 /* The default RSYNC_RSH is always set in config.h. */
112 #include <sys/types.h>
120 #ifdef HAVE_SYS_PARAM_H
121 #include <sys/param.h>
128 #if defined(HAVE_MALLOC_H) && (defined(HAVE_MALLINFO) || !defined(HAVE_STDLIB_H))
132 #ifdef HAVE_SYS_SOCKET_H
133 #include <sys/socket.h>
140 #ifdef TIME_WITH_SYS_TIME
141 #include <sys/time.h>
144 #ifdef HAVE_SYS_TIME_H
145 #include <sys/time.h>
154 #ifdef HAVE_SYS_FCNTL_H
155 #include <sys/fcntl.h>
159 #include <sys/stat.h>
161 #ifdef HAVE_SYS_IOCTL_H
162 #include <sys/ioctl.h>
165 #ifdef HAVE_SYS_FILIO_H
166 #include <sys/filio.h>
170 #ifdef HAVE_SYS_WAIT_H
171 #include <sys/wait.h>
185 #ifdef HAVE_SYS_SELECT_H
186 #include <sys/select.h>
189 #ifdef HAVE_SYS_MODE_H
190 /* apparently AIX needs this for S_ISLNK */
192 #include <sys/mode.h>
200 /* these are needed for the uid/gid mapping code */
205 #include <netinet/in.h>
206 #include <arpa/inet.h>
209 #include <sys/file.h>
214 # define dirent direct
216 # include <sys/ndir.h>
219 # include <sys/dir.h>
236 #define uchar unsigned char
239 #if HAVE_UNSIGNED_CHAR
240 #define schar signed char
246 #if (SIZEOF_INT == 4)
248 #elif (SIZEOF_LONG == 4)
250 #elif (SIZEOF_SHORT == 4)
253 /* I hope this works */
260 #define uint32 unsigned int32
264 #define OFF_T off64_t
265 #define STRUCT_STAT struct stat64
268 #define STRUCT_STAT struct stat
272 #define int64 off64_t
273 #elif (SIZEOF_LONG == 8)
275 #elif (SIZEOF_INT == 8)
278 #define int64 long long
280 /* As long as it gets... */
285 #if (SIZEOF_LONG == 8)
286 #define uint64 unsigned long
287 #elif (SIZEOF_INT == 8)
288 #define uint64 unsigned int
290 #define uint64 unsigned long long
292 /* As long as it gets... */
293 #define uint64 unsigned off_t
296 /* Starting from protocol version 26, we always use 64-bit
297 * ino_t and dev_t internally, even if this platform does not
298 * allow files to have 64-bit inums. That's because the
299 * receiver needs to find duplicate (dev,ino) tuples to detect
300 * hardlinks, and it might have files coming from a platform
301 * that has 64-bit inums.
303 * The only exception is if we're on a platform with no 64-bit type at
306 * Because we use read_longint() to get these off the wire, if you
307 * transfer devices or hardlinks with dev or inum > 2**32 to a machine
308 * with no 64-bit types then you will get an overflow error. Probably
309 * not many people have that combination of machines, and you can
310 * avoid it by not preserving hardlinks or not transferring device
311 * nodes. It's not clear that any other behaviour is better.
313 * Note that if you transfer devices from a 64-bit-devt machine (say,
314 * Solaris) to a 32-bit-devt machine (say, Linux-2.2/x86) then the
315 * device numbers will be truncated. But it's a kind of silly thing
318 * FIXME: In future, we should probable split the device number into
319 * major/minor, and transfer the two parts as 32-bit ints. That gives
320 * you somewhat more of a chance that they'll come from a big machine
321 * to a little one in a useful way.
323 * FIXME: Really we need an unsigned type, and we perhaps ought to
324 * cope with platforms on which this is an unsigned int or even a
327 #define INO64_T uint64
328 #define DEV64_T uint64
331 #define MIN(a,b) ((a)<(b)?(a):(b))
335 #define MAX(a,b) ((a)>(b)?(a):(b))
338 #ifndef MAXHOSTNAMELEN
339 #define MAXHOSTNAMELEN 256
342 /* the length of the md4 checksum */
343 #define MD4_SUM_LENGTH 16
344 #define SUM_LENGTH 16
345 #define SHORT_SUM_LENGTH 2
346 #define BLOCKSUM_BIAS 10
349 #define MAXPATHLEN 1024
357 #define INADDR_NONE 0xffffffff
360 #ifndef IN_LOOPBACKNET
361 #define IN_LOOPBACKNET 127
371 /** Device this file lives upon */
374 /** If this is a device node, the device number. */
386 #define ARENA_SIZE (32 * 1024)
392 struct string_area *next;
398 struct file_struct **files;
399 struct string_area *string_area;
403 OFF_T offset; /**< offset in file of this chunk */
404 int len; /**< length of chunk of file */
405 int i; /**< index of this chunk */
406 uint32 sum1; /**< simple checksum */
407 char sum2[SUM_LENGTH]; /**< checksum */
411 OFF_T flength; /**< total file length */
412 size_t count; /**< how many chunks */
413 size_t remainder; /**< flength % block_length */
414 size_t blength; /**< block_length */
415 size_t s2length; /**< sum2_length */
416 struct sum_buf *sums; /**< points to info for each chunk */
420 char *p; /* Window pointer */
421 int fd; /* File Descriptor */
422 int p_size; /* Window size at allocation */
423 int p_len; /* Window size after fill */
424 /* p_size and p_len could be
425 * consolodated by using a local
426 * variable in map_ptr() */
427 int status; /* first errno from read errors */
428 OFF_T file_size; /* File size (from stat) */
429 OFF_T p_offset; /* Window start */
430 OFF_T p_fd_offset; /* offset of cursor in fd ala lseek */
433 #define MATCHFLG_WILD (1<<0) /* pattern has '*', '[', and/or '?' */
434 #define MATCHFLG_WILD2 (1<<1) /* pattern has '**' */
435 #define MATCHFLG_WILD2_PREFIX (1<<2) /* pattern starts with '**' */
436 #define MATCHFLG_ABS_PATH (1<<3) /* path-match on absolute path */
437 struct exclude_struct {
447 int64 total_transferred_size;
454 int num_transferred_files;
458 /* we need this function because of the silly way in which duplicate
459 entries are handled in the file lists - we can't change this
460 without breaking existing versions */
461 static inline int flist_up(struct file_list *flist, int i)
463 while (!flist->files[i]->basename) i++;
467 #include "byteorder.h"
468 #include "lib/mdfour.h"
469 #include "lib/wildmatch.h"
470 #include "lib/permstring.h"
471 #include "lib/addrinfo.h"
475 /* We have replacement versions of these if they're missing. */
476 #ifndef HAVE_ASPRINTF
477 int asprintf(char **ptr, const char *format, ...);
480 #ifndef HAVE_VASPRINTF
481 int vasprintf(char **ptr, const char *format, va_list ap);
484 #if !defined(HAVE_VSNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
485 #define vsnprintf rsync_vsnprintf
486 int vsnprintf(char *str, size_t count, const char *fmt, va_list args);
489 #if !defined(HAVE_SNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
490 #define snprintf rsync_snprintf
491 int snprintf(char *str,size_t count,const char *fmt,...);
496 extern char *sys_errlist[];
497 #define strerror(i) sys_errlist[i]
501 # define strchr index
502 # define strrchr rindex
505 #ifndef HAVE_ERRNO_DECL
509 #define SUPPORT_LINKS HAVE_READLINK
510 #define SUPPORT_HARD_LINKS HAVE_LINK
512 /* This could be bad on systems which have no lchown and where chown
513 * follows symbollic links. On such systems it might be better not to
514 * try to chown symlinks at all. */
519 #define SIGNAL_CAST (RETSIGTYPE (*)())
522 #define EWOULDBLOCK EAGAIN
526 #define STDIN_FILENO 0
529 #ifndef STDOUT_FILENO
530 #define STDOUT_FILENO 1
533 #ifndef STDERR_FILENO
534 #define STDERR_FILENO 2
542 #define ACCESSPERMS 0777
549 #define CHMOD_BITS (S_ISUID | S_ISGID | S_ISVTX | ACCESSPERMS)
552 #define _S_IFMT 0170000
556 #define _S_IFLNK 0120000
560 #define S_ISLNK(mode) (((mode) & (_S_IFMT)) == (_S_IFLNK))
564 #define S_ISBLK(mode) (((mode) & (_S_IFMT)) == (_S_IFBLK))
568 #define S_ISCHR(mode) (((mode) & (_S_IFMT)) == (_S_IFCHR))
573 #define S_ISSOCK(mode) (((mode) & (_S_IFMT)) == (_S_IFSOCK))
575 #define S_ISSOCK(mode) (0)
581 #define S_ISFIFO(mode) (((mode) & (_S_IFMT)) == (_S_IFIFO))
583 #define S_ISFIFO(mode) (0)
588 #define S_ISDIR(mode) (((mode) & (_S_IFMT)) == (_S_IFDIR))
592 #define S_ISREG(mode) (((mode) & (_S_IFMT)) == (_S_IFREG))
595 /* work out what fcntl flag to use for non-blocking */
597 # define NONBLOCK_FLAG O_NONBLOCK
599 # define NONBLOCK_FLAG O_NDELAY
601 # define NONBLOCK_FLAG FNDELAY
604 #ifndef INADDR_LOOPBACK
605 #define INADDR_LOOPBACK 0x7f000001
609 #define INADDR_NONE 0xffffffff
612 #define IS_DEVICE(mode) (S_ISCHR(mode) || S_ISBLK(mode) || S_ISSOCK(mode) || S_ISFIFO(mode))
614 /* Initial mask on permissions given to temporary files. Mask off setuid
615 bits and group access because of potential race-condition security
616 holes, and mask other access because mode 707 is bizarre */
617 #define INITACCESSPERMS 0700
619 /* handler for null strings in printf format */
620 #define NS(s) ((s)?(s):"<NULL>")
622 #if !defined(__GNUC__) || defined(APPLE)
623 /* Apparently the OS X port of gcc gags on __attribute__.
625 * <http://www.opensource.apple.com/bugs/X/gcc/2512150.html> */
626 #define __attribute__(x)
630 /* Convenient wrappers for malloc and realloc. Use them. */
631 #define new(type) ((type *)malloc(sizeof(type)))
632 #define new_array(type, num) ((type *)_new_array(sizeof(type), (num)))
633 #define realloc_array(ptr, type, num) ((type *)_realloc_array((ptr), sizeof(type), (num)))
635 /* use magic gcc attributes to catch format errors */
636 void rprintf(enum logcode , const char *, ...)
637 __attribute__((format (printf, 2, 3)))
640 /* This is just like rprintf, but it also tries to print some
641 * representation of the error code. Normally errcode = errno. */
642 void rsyserr(enum logcode, int, const char *, ...)
643 __attribute__((format (printf, 3, 4)))
646 #ifdef REPLACE_INET_NTOA
647 #define inet_ntoa rep_inet_ntoa
650 /* Make sure that the O_BINARY flag is defined. */
656 size_t strlcpy(char *d, const char *s, size_t bufsize);
660 size_t strlcat(char *d, const char *s, size_t bufsize);
664 #define WEXITSTATUS(stat) ((int)(((stat)>>8)&0xFF))
667 #define exit_cleanup(code) _exit_cleanup(code, __FILE__, __LINE__)
672 #ifndef HAVE_INET_NTOP
674 inet_ntop(int af, const void *src, char *dst, size_t size);
675 #endif /* !HAVE_INET_NTOP */
677 #ifndef HAVE_INET_PTON
678 int inet_pton(int af, const char *src, void *dst);
681 #ifdef MAINTAINER_MODE
682 const char *get_panic_action(void);
685 #define UNUSED(x) x __attribute__((__unused__))
687 extern const char *io_write_phase, *io_read_phase;