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"
27 #define RSYNC_RSH_IO_ENV "RSYNC_RSH_IO"
29 #define RSYNC_NAME "rsync"
30 #define RSYNCD_SYSCONF "/etc/rsyncd.conf"
31 #define RSYNCD_USERCONF "rsyncd.conf"
33 #define DEFAULT_LOCK_FILE "/var/run/rsyncd.lock"
34 #define URL_PREFIX "rsync://"
36 #define BACKUP_SUFFIX "~"
38 /* a non-zero CHAR_OFFSET makes the rolling sum stronger, but is
39 incompatible with older versions :-( */
43 #define FLAG_DELETE (1<<0)
44 #define SAME_MODE (1<<1)
45 #define EXTENDED_FLAGS (1<<2)
46 #define SAME_RDEV_pre28 EXTENDED_FLAGS /* Only use in protocols < 28 */
47 #define SAME_UID (1<<3)
48 #define SAME_GID (1<<4)
49 #define SAME_DIR (1<<5)
50 #define SAME_NAME SAME_DIR
51 #define LONG_NAME (1<<6)
52 #define SAME_TIME (1<<7)
53 #define SAME_HIGH_RDEV (1<<8)
54 #define HAS_INODE_DATA (1<<9)
55 #define SAME_DEV (1<<10)
57 /* What flags are relevant after the transfer of the flist is complete? */
58 #define LIVE_FLAGS FLAG_DELETE
60 /* update this if you make incompatible changes */
61 #define PROTOCOL_VERSION 28
63 /* We refuse to interoperate with versions that are not in this range.
64 * Note that we assume we'll work with later versions: the onus is on
65 * people writing them to make sure that they don't send us anything
66 * we won't understand.
68 * Interoperation with old but supported protocol versions
69 * should cause a warning to be printed. At a future date
70 * the old protocol will become the minimum and
71 * compatibility code removed.
73 * There are two possible explanations for the limit at
74 * MAX_PROTOCOL_VERSION: either to allow new major-rev versions that
75 * do not interoperate with us, and (more likely) so that we can
76 * detect an attempt to connect rsync to a non-rsync server, which is
77 * unlikely to begin by sending a byte between MIN_PROTOCL_VERSION and
78 * MAX_PROTOCOL_VERSION. */
80 #define MIN_PROTOCOL_VERSION 19
81 #define OLD_PROTOCOL_VERSION 20
82 #define MAX_PROTOCOL_VERSION 40
84 #define RSYNC_PORT 873
86 #define SPARSE_WRITE_SIZE (1024)
87 #define WRITE_SIZE (32*1024)
88 #define CHUNK_SIZE (32*1024)
89 #define MAX_MAP_SIZE (256*1024)
90 #define IO_BUFFER_SIZE (4092)
92 #define IOERR_GENERAL (1<<0) /* For backward compatibility, this must == 1 */
93 #define IOERR_VANISHED (1<<1)
100 #define SERVER_EXCLUDES 1
101 #define ALL_EXCLUDES 2
104 #define MISSING_FATAL 1
106 #define ADD_INCLUDE 1
107 #define ADD_EXCLUDE 0
110 #define NORMAL_FLUSH 0
112 /* Log-message categories. FLOG is only used on the daemon side to
113 * output messages to the log file. */
114 enum logcode { FERROR=1, FINFO=2, FLOG=3 };
116 /* Messages types that are sent over the message channel. The logcode
117 * values must all be present here with identical numbers. */
119 MSG_DATA=0, /* raw data on the multiplexed stream */
120 MSG_ERROR=FERROR, MSG_INFO=FINFO, MSG_LOG=FLOG, /* remote logging */
121 MSG_REDO=4, /* reprocess indicated flist index */
122 MSG_DONE=5, /* current phase is done */
129 /* The default RSYNC_RSH is always set in config.h. */
131 #include <sys/types.h>
139 #ifdef HAVE_SYS_PARAM_H
140 #include <sys/param.h>
147 #if defined(HAVE_MALLOC_H) && (defined(HAVE_MALLINFO) || !defined(HAVE_STDLIB_H))
151 #ifdef HAVE_SYS_SOCKET_H
152 #include <sys/socket.h>
159 #ifdef TIME_WITH_SYS_TIME
160 #include <sys/time.h>
163 #ifdef HAVE_SYS_TIME_H
164 #include <sys/time.h>
173 #ifdef HAVE_SYS_FCNTL_H
174 #include <sys/fcntl.h>
178 #include <sys/stat.h>
180 #ifdef HAVE_SYS_IOCTL_H
181 #include <sys/ioctl.h>
184 #ifdef HAVE_SYS_FILIO_H
185 #include <sys/filio.h>
189 #ifdef HAVE_SYS_WAIT_H
190 #include <sys/wait.h>
204 #ifdef HAVE_SYS_SELECT_H
205 #include <sys/select.h>
208 #ifdef HAVE_SYS_MODE_H
209 /* apparently AIX needs this for S_ISLNK */
211 #include <sys/mode.h>
219 /* these are needed for the uid/gid mapping code */
224 #include <netinet/in.h>
225 #include <arpa/inet.h>
228 #include <sys/file.h>
233 # define dirent direct
235 # include <sys/ndir.h>
238 # include <sys/dir.h>
255 #define uchar unsigned char
258 #if HAVE_UNSIGNED_CHAR
259 #define schar signed char
265 #if (SIZEOF_INT == 4)
267 #elif (SIZEOF_LONG == 4)
269 #elif (SIZEOF_SHORT == 4)
272 /* I hope this works */
279 #define uint32 unsigned int32
283 #define OFF_T off64_t
284 #define STRUCT_STAT struct stat64
287 #define STRUCT_STAT struct stat
291 #define int64 off64_t
292 #elif (SIZEOF_LONG == 8)
294 #elif (SIZEOF_INT == 8)
297 #define int64 long long
299 /* As long as it gets... */
304 #if (SIZEOF_LONG == 8)
305 #define uint64 unsigned long
306 #elif (SIZEOF_INT == 8)
307 #define uint64 unsigned int
309 #define uint64 unsigned long long
311 /* As long as it gets... */
312 #define uint64 unsigned off_t
315 /* Starting from protocol version 26, we always use 64-bit
316 * ino_t and dev_t internally, even if this platform does not
317 * allow files to have 64-bit inums. That's because the
318 * receiver needs to find duplicate (dev,ino) tuples to detect
319 * hardlinks, and it might have files coming from a platform
320 * that has 64-bit inums.
322 * The only exception is if we're on a platform with no 64-bit type at
325 * Because we use read_longint() to get these off the wire, if you
326 * transfer devices or hardlinks with dev or inum > 2**32 to a machine
327 * with no 64-bit types then you will get an overflow error. Probably
328 * not many people have that combination of machines, and you can
329 * avoid it by not preserving hardlinks or not transferring device
330 * nodes. It's not clear that any other behaviour is better.
332 * Note that if you transfer devices from a 64-bit-devt machine (say,
333 * Solaris) to a 32-bit-devt machine (say, Linux-2.2/x86) then the
334 * device numbers will be truncated. But it's a kind of silly thing
337 * FIXME: In future, we should probable split the device number into
338 * major/minor, and transfer the two parts as 32-bit ints. That gives
339 * you somewhat more of a chance that they'll come from a big machine
340 * to a little one in a useful way.
342 * FIXME: Really we need an unsigned type, and we perhaps ought to
343 * cope with platforms on which this is an unsigned int or even a
346 #define INO64_T uint64
347 #define DEV64_T uint64
350 #define MIN(a,b) ((a)<(b)?(a):(b))
354 #define MAX(a,b) ((a)>(b)?(a):(b))
357 #ifndef MAXHOSTNAMELEN
358 #define MAXHOSTNAMELEN 256
361 /* the length of the md4 checksum */
362 #define MD4_SUM_LENGTH 16
363 #define SUM_LENGTH 16
364 #define SHORT_SUM_LENGTH 2
365 #define BLOCKSUM_BIAS 10
368 #define MAXPATHLEN 1024
376 #define INADDR_NONE 0xffffffff
379 #ifndef IN_LOOPBACKNET
380 #define IN_LOOPBACKNET 127
383 #define GID_NONE (gid_t) -1
386 struct file_struct *head;
387 struct file_struct *next;
395 #define F_DEV link_u.idev->dev
396 #define F_INODE link_u.idev->inode
398 #define F_HEAD link_u.links->head
399 #define F_NEXT link_u.links->next
406 DEV64_T rdev; /* The device number, if this is a device */
407 char *sum; /* Only a normal file can have a checksum */
408 char *link; /* Holds symlink string, if a symlink */
419 unsigned short flags;
422 #define ARENA_SIZE (32 * 1024)
428 struct string_area *next;
434 struct file_struct **files;
435 struct string_area *string_area;
439 OFF_T offset; /**< offset in file of this chunk */
440 unsigned int len; /**< length of chunk of file */
441 int i; /**< index of this chunk */
442 uint32 sum1; /**< simple checksum */
443 char sum2[SUM_LENGTH]; /**< checksum */
447 OFF_T flength; /**< total file length */
448 size_t count; /**< how many chunks */
449 unsigned int blength; /**< block_length */
450 unsigned int remainder; /**< flength % block_length */
451 int s2length; /**< sum2_length */
452 struct sum_buf *sums; /**< points to info for each chunk */
456 char *p; /* Window pointer */
457 int fd; /* File Descriptor */
458 int p_size; /* Window size at allocation */
459 int p_len; /* Window size after fill */
460 /* p_size and p_len could be
461 * consolodated by using a local
462 * variable in map_ptr() */
463 int status; /* first errno from read errors */
464 OFF_T file_size; /* File size (from stat) */
465 OFF_T p_offset; /* Window start */
466 OFF_T p_fd_offset; /* offset of cursor in fd ala lseek */
469 #define MATCHFLG_WILD (1<<0) /* pattern has '*', '[', and/or '?' */
470 #define MATCHFLG_WILD2 (1<<1) /* pattern has '**' */
471 #define MATCHFLG_WILD2_PREFIX (1<<2) /* pattern starts with '**' */
472 #define MATCHFLG_ABS_PATH (1<<3) /* path-match on absolute path */
473 struct exclude_struct {
483 int64 total_transferred_size;
490 int num_transferred_files;
491 int current_file_index;
495 /* we need this function because of the silly way in which duplicate
496 entries are handled in the file lists - we can't change this
497 without breaking existing versions */
498 static inline int flist_up(struct file_list *flist, int i)
500 while (!flist->files[i]->basename) i++;
504 #include "byteorder.h"
505 #include "lib/mdfour.h"
506 #include "lib/wildmatch.h"
507 #include "lib/permstring.h"
508 #include "lib/addrinfo.h"
512 /* We have replacement versions of these if they're missing. */
513 #ifndef HAVE_ASPRINTF
514 int asprintf(char **ptr, const char *format, ...);
517 #ifndef HAVE_VASPRINTF
518 int vasprintf(char **ptr, const char *format, va_list ap);
521 #if !defined(HAVE_VSNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
522 #define vsnprintf rsync_vsnprintf
523 int vsnprintf(char *str, size_t count, const char *fmt, va_list args);
526 #if !defined(HAVE_SNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
527 #define snprintf rsync_snprintf
528 int snprintf(char *str,size_t count,const char *fmt,...);
533 extern char *sys_errlist[];
534 #define strerror(i) sys_errlist[i]
538 # define strchr index
539 # define strrchr rindex
542 #ifndef HAVE_ERRNO_DECL
546 #define SUPPORT_LINKS HAVE_READLINK
547 #define SUPPORT_HARD_LINKS HAVE_LINK
549 /* This could be bad on systems which have no lchown and where chown
550 * follows symbollic links. On such systems it might be better not to
551 * try to chown symlinks at all. */
556 #define SIGNAL_CAST (RETSIGTYPE (*)())
559 #define EWOULDBLOCK EAGAIN
563 #define STDIN_FILENO 0
566 #ifndef STDOUT_FILENO
567 #define STDOUT_FILENO 1
570 #ifndef STDERR_FILENO
571 #define STDERR_FILENO 2
579 #define ACCESSPERMS 0777
586 #define CHMOD_BITS (S_ISUID | S_ISGID | S_ISVTX | ACCESSPERMS)
589 #define _S_IFMT 0170000
593 #define _S_IFLNK 0120000
597 #define S_ISLNK(mode) (((mode) & (_S_IFMT)) == (_S_IFLNK))
601 #define S_ISBLK(mode) (((mode) & (_S_IFMT)) == (_S_IFBLK))
605 #define S_ISCHR(mode) (((mode) & (_S_IFMT)) == (_S_IFCHR))
610 #define S_ISSOCK(mode) (((mode) & (_S_IFMT)) == (_S_IFSOCK))
612 #define S_ISSOCK(mode) (0)
618 #define S_ISFIFO(mode) (((mode) & (_S_IFMT)) == (_S_IFIFO))
620 #define S_ISFIFO(mode) (0)
625 #define S_ISDIR(mode) (((mode) & (_S_IFMT)) == (_S_IFDIR))
629 #define S_ISREG(mode) (((mode) & (_S_IFMT)) == (_S_IFREG))
632 /* work out what fcntl flag to use for non-blocking */
634 # define NONBLOCK_FLAG O_NONBLOCK
636 # define NONBLOCK_FLAG O_NDELAY
638 # define NONBLOCK_FLAG FNDELAY
641 #ifndef INADDR_LOOPBACK
642 #define INADDR_LOOPBACK 0x7f000001
646 #define INADDR_NONE 0xffffffff
649 #define IS_DEVICE(mode) (S_ISCHR(mode) || S_ISBLK(mode) || S_ISSOCK(mode) || S_ISFIFO(mode))
651 /* Initial mask on permissions given to temporary files. Mask off setuid
652 bits and group access because of potential race-condition security
653 holes, and mask other access because mode 707 is bizarre */
654 #define INITACCESSPERMS 0700
656 /* handler for null strings in printf format */
657 #define NS(s) ((s)?(s):"<NULL>")
659 #if !defined(__GNUC__) || defined(APPLE)
660 /* Apparently the OS X port of gcc gags on __attribute__.
662 * <http://www.opensource.apple.com/bugs/X/gcc/2512150.html> */
663 #define __attribute__(x)
667 /* Convenient wrappers for malloc and realloc. Use them. */
668 #define new(type) ((type *)malloc(sizeof(type)))
669 #define new_array(type, num) ((type *)_new_array(sizeof(type), (num)))
670 #define realloc_array(ptr, type, num) ((type *)_realloc_array((ptr), sizeof(type), (num)))
672 /* use magic gcc attributes to catch format errors */
673 void rprintf(enum logcode , const char *, ...)
674 __attribute__((format (printf, 2, 3)))
677 /* This is just like rprintf, but it also tries to print some
678 * representation of the error code. Normally errcode = errno. */
679 void rsyserr(enum logcode, int, const char *, ...)
680 __attribute__((format (printf, 3, 4)))
683 #ifdef REPLACE_INET_NTOA
684 #define inet_ntoa rep_inet_ntoa
687 /* Make sure that the O_BINARY flag is defined. */
693 size_t strlcpy(char *d, const char *s, size_t bufsize);
697 size_t strlcat(char *d, const char *s, size_t bufsize);
701 #define WEXITSTATUS(stat) ((int)(((stat)>>8)&0xFF))
704 #define exit_cleanup(code) _exit_cleanup(code, __FILE__, __LINE__)
709 #ifndef HAVE_INET_NTOP
711 inet_ntop(int af, const void *src, char *dst, size_t size);
712 #endif /* !HAVE_INET_NTOP */
714 #ifndef HAVE_INET_PTON
715 int inet_pton(int af, const char *src, void *dst);
718 #ifdef MAINTAINER_MODE
719 const char *get_panic_action(void);
722 #define UNUSED(x) x __attribute__((__unused__))
724 extern const char *io_write_phase, *io_read_phase;