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 :-( */
42 /* These flags are used during the flist transfer. */
44 #define FLAG_DELETE (1<<0)
45 #define SAME_MODE (1<<1)
46 #define EXTENDED_FLAGS (1<<2)
47 #define SAME_RDEV_pre28 EXTENDED_FLAGS /* Only use in protocols < 28 */
48 #define SAME_UID (1<<3)
49 #define SAME_GID (1<<4)
50 #define SAME_DIR (1<<5)
51 #define SAME_NAME SAME_DIR
52 #define LONG_NAME (1<<6)
53 #define SAME_TIME (1<<7)
54 #define SAME_HIGH_RDEV (1<<8)
55 #define HAS_INODE_DATA (1<<9)
56 #define SAME_DEV (1<<10)
58 /* What flags above are relevant after the transfer of the flist? */
59 #define LIVE_FLAGS FLAG_DELETE
61 /* update this if you make incompatible changes */
62 #define PROTOCOL_VERSION 28
64 /* We refuse to interoperate with versions that are not in this range.
65 * Note that we assume we'll work with later versions: the onus is on
66 * people writing them to make sure that they don't send us anything
67 * we won't understand.
69 * Interoperation with old but supported protocol versions
70 * should cause a warning to be printed. At a future date
71 * the old protocol will become the minimum and
72 * compatibility code removed.
74 * There are two possible explanations for the limit at
75 * MAX_PROTOCOL_VERSION: either to allow new major-rev versions that
76 * do not interoperate with us, and (more likely) so that we can
77 * detect an attempt to connect rsync to a non-rsync server, which is
78 * unlikely to begin by sending a byte between MIN_PROTOCL_VERSION and
79 * MAX_PROTOCOL_VERSION. */
81 #define MIN_PROTOCOL_VERSION 19
82 #define OLD_PROTOCOL_VERSION 20
83 #define MAX_PROTOCOL_VERSION 40
85 #define RSYNC_PORT 873
87 #define SPARSE_WRITE_SIZE (1024)
88 #define WRITE_SIZE (32*1024)
89 #define CHUNK_SIZE (32*1024)
90 #define MAX_MAP_SIZE (256*1024)
91 #define IO_BUFFER_SIZE (4092)
93 #define IOERR_GENERAL (1<<0) /* For backward compatibility, this must == 1 */
94 #define IOERR_VANISHED (1<<1)
100 #define NO_EXCLUDES 0
101 #define SERVER_EXCLUDES 1
102 #define ALL_EXCLUDES 2
105 #define MISSING_FATAL 1
107 #define ADD_INCLUDE 1
108 #define ADD_EXCLUDE 0
111 #define NORMAL_FLUSH 0
113 /* Log-message categories. FLOG is only used on the daemon side to
114 * output messages to the log file. */
115 enum logcode { FERROR=1, FINFO=2, FLOG=3 };
117 /* Messages types that are sent over the message channel. The logcode
118 * values must all be present here with identical numbers. */
120 MSG_DATA=0, /* raw data on the multiplexed stream */
121 MSG_ERROR=FERROR, MSG_INFO=FINFO, MSG_LOG=FLOG, /* remote logging */
122 MSG_REDO=4, /* reprocess indicated flist index */
123 MSG_DONE=5, /* current phase is done */
130 /* The default RSYNC_RSH is always set in config.h. */
132 #include <sys/types.h>
140 #ifdef HAVE_SYS_PARAM_H
141 #include <sys/param.h>
148 #if defined(HAVE_MALLOC_H) && (defined(HAVE_MALLINFO) || !defined(HAVE_STDLIB_H))
152 #ifdef HAVE_SYS_SOCKET_H
153 #include <sys/socket.h>
160 #ifdef TIME_WITH_SYS_TIME
161 #include <sys/time.h>
164 #ifdef HAVE_SYS_TIME_H
165 #include <sys/time.h>
174 #ifdef HAVE_SYS_FCNTL_H
175 #include <sys/fcntl.h>
179 #include <sys/stat.h>
181 #ifdef HAVE_SYS_IOCTL_H
182 #include <sys/ioctl.h>
185 #ifdef HAVE_SYS_FILIO_H
186 #include <sys/filio.h>
190 #ifdef HAVE_SYS_WAIT_H
191 #include <sys/wait.h>
205 #ifdef HAVE_SYS_SELECT_H
206 #include <sys/select.h>
209 #ifdef HAVE_SYS_MODE_H
210 /* apparently AIX needs this for S_ISLNK */
212 #include <sys/mode.h>
220 /* these are needed for the uid/gid mapping code */
225 #include <netinet/in.h>
226 #include <arpa/inet.h>
229 #include <sys/file.h>
234 # define dirent direct
236 # include <sys/ndir.h>
239 # include <sys/dir.h>
256 #define uchar unsigned char
259 #if HAVE_UNSIGNED_CHAR
260 #define schar signed char
266 #if (SIZEOF_INT == 4)
268 #elif (SIZEOF_LONG == 4)
270 #elif (SIZEOF_SHORT == 4)
273 /* I hope this works */
280 #define uint32 unsigned int32
284 #define OFF_T off64_t
285 #define STRUCT_STAT struct stat64
288 #define STRUCT_STAT struct stat
292 #define int64 off64_t
293 #elif (SIZEOF_LONG == 8)
295 #elif (SIZEOF_INT == 8)
298 #define int64 long long
300 /* As long as it gets... */
305 #if (SIZEOF_LONG == 8)
306 #define uint64 unsigned long
307 #elif (SIZEOF_INT == 8)
308 #define uint64 unsigned int
310 #define uint64 unsigned long long
312 /* As long as it gets... */
313 #define uint64 unsigned off_t
316 /* Starting from protocol version 26, we always use 64-bit
317 * ino_t and dev_t internally, even if this platform does not
318 * allow files to have 64-bit inums. That's because the
319 * receiver needs to find duplicate (dev,ino) tuples to detect
320 * hardlinks, and it might have files coming from a platform
321 * that has 64-bit inums.
323 * The only exception is if we're on a platform with no 64-bit type at
326 * Because we use read_longint() to get these off the wire, if you
327 * transfer devices or hardlinks with dev or inum > 2**32 to a machine
328 * with no 64-bit types then you will get an overflow error. Probably
329 * not many people have that combination of machines, and you can
330 * avoid it by not preserving hardlinks or not transferring device
331 * nodes. It's not clear that any other behaviour is better.
333 * Note that if you transfer devices from a 64-bit-devt machine (say,
334 * Solaris) to a 32-bit-devt machine (say, Linux-2.2/x86) then the
335 * device numbers will be truncated. But it's a kind of silly thing
338 * FIXME: In future, we should probable split the device number into
339 * major/minor, and transfer the two parts as 32-bit ints. That gives
340 * you somewhat more of a chance that they'll come from a big machine
341 * to a little one in a useful way.
343 * FIXME: Really we need an unsigned type, and we perhaps ought to
344 * cope with platforms on which this is an unsigned int or even a
347 #define INO64_T uint64
348 #define DEV64_T uint64
351 #define MIN(a,b) ((a)<(b)?(a):(b))
355 #define MAX(a,b) ((a)>(b)?(a):(b))
358 #ifndef MAXHOSTNAMELEN
359 #define MAXHOSTNAMELEN 256
362 /* the length of the md4 checksum */
363 #define MD4_SUM_LENGTH 16
364 #define SUM_LENGTH 16
365 #define SHORT_SUM_LENGTH 2
366 #define BLOCKSUM_BIAS 10
369 #define MAXPATHLEN 1024
377 #define INADDR_NONE 0xffffffff
380 #ifndef IN_LOOPBACKNET
381 #define IN_LOOPBACKNET 127
384 #define GID_NONE (gid_t) -1
387 struct file_struct *head;
388 struct file_struct *next;
396 #define F_DEV link_u.idev->dev
397 #define F_INODE link_u.idev->inode
399 #define F_HEAD link_u.links->head
400 #define F_NEXT link_u.links->next
407 DEV64_T rdev; /* The device number, if this is a device */
408 char *sum; /* Only a normal file can have a checksum */
409 char *link; /* Holds symlink string, if a symlink */
420 unsigned short flags;
423 #define ARENA_SIZE (32 * 1024)
429 struct string_area *next;
435 struct file_struct **files;
436 struct string_area *string_area;
440 OFF_T offset; /**< offset in file of this chunk */
441 unsigned int len; /**< length of chunk of file */
442 int i; /**< index of this chunk */
443 uint32 sum1; /**< simple checksum */
444 char sum2[SUM_LENGTH]; /**< checksum */
448 OFF_T flength; /**< total file length */
449 size_t count; /**< how many chunks */
450 unsigned int blength; /**< block_length */
451 unsigned int remainder; /**< flength % block_length */
452 int s2length; /**< sum2_length */
453 struct sum_buf *sums; /**< points to info for each chunk */
457 char *p; /* Window pointer */
458 int fd; /* File Descriptor */
459 int p_size; /* Window size at allocation */
460 int p_len; /* Window size after fill */
461 /* p_size and p_len could be
462 * consolodated by using a local
463 * variable in map_ptr() */
464 int status; /* first errno from read errors */
465 OFF_T file_size; /* File size (from stat) */
466 OFF_T p_offset; /* Window start */
467 OFF_T p_fd_offset; /* offset of cursor in fd ala lseek */
470 #define MATCHFLG_WILD (1<<0) /* pattern has '*', '[', and/or '?' */
471 #define MATCHFLG_WILD2 (1<<1) /* pattern has '**' */
472 #define MATCHFLG_WILD2_PREFIX (1<<2) /* pattern starts with '**' */
473 #define MATCHFLG_ABS_PATH (1<<3) /* path-match on absolute path */
474 struct exclude_struct {
484 int64 total_transferred_size;
491 int num_transferred_files;
492 int current_file_index;
496 /* we need this function because of the silly way in which duplicate
497 entries are handled in the file lists - we can't change this
498 without breaking existing versions */
499 static inline int flist_up(struct file_list *flist, int i)
501 while (!flist->files[i]->basename) i++;
505 #include "byteorder.h"
506 #include "lib/mdfour.h"
507 #include "lib/wildmatch.h"
508 #include "lib/permstring.h"
509 #include "lib/addrinfo.h"
513 /* We have replacement versions of these if they're missing. */
514 #ifndef HAVE_ASPRINTF
515 int asprintf(char **ptr, const char *format, ...);
518 #ifndef HAVE_VASPRINTF
519 int vasprintf(char **ptr, const char *format, va_list ap);
522 #if !defined(HAVE_VSNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
523 #define vsnprintf rsync_vsnprintf
524 int vsnprintf(char *str, size_t count, const char *fmt, va_list args);
527 #if !defined(HAVE_SNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
528 #define snprintf rsync_snprintf
529 int snprintf(char *str,size_t count,const char *fmt,...);
534 extern char *sys_errlist[];
535 #define strerror(i) sys_errlist[i]
539 # define strchr index
540 # define strrchr rindex
543 #ifndef HAVE_ERRNO_DECL
547 #define SUPPORT_LINKS HAVE_READLINK
548 #define SUPPORT_HARD_LINKS HAVE_LINK
550 /* This could be bad on systems which have no lchown and where chown
551 * follows symbollic links. On such systems it might be better not to
552 * try to chown symlinks at all. */
557 #define SIGNAL_CAST (RETSIGTYPE (*)())
560 #define EWOULDBLOCK EAGAIN
564 #define STDIN_FILENO 0
567 #ifndef STDOUT_FILENO
568 #define STDOUT_FILENO 1
571 #ifndef STDERR_FILENO
572 #define STDERR_FILENO 2
580 #define ACCESSPERMS 0777
587 #define CHMOD_BITS (S_ISUID | S_ISGID | S_ISVTX | ACCESSPERMS)
590 #define _S_IFMT 0170000
594 #define _S_IFLNK 0120000
598 #define S_ISLNK(mode) (((mode) & (_S_IFMT)) == (_S_IFLNK))
602 #define S_ISBLK(mode) (((mode) & (_S_IFMT)) == (_S_IFBLK))
606 #define S_ISCHR(mode) (((mode) & (_S_IFMT)) == (_S_IFCHR))
611 #define S_ISSOCK(mode) (((mode) & (_S_IFMT)) == (_S_IFSOCK))
613 #define S_ISSOCK(mode) (0)
619 #define S_ISFIFO(mode) (((mode) & (_S_IFMT)) == (_S_IFIFO))
621 #define S_ISFIFO(mode) (0)
626 #define S_ISDIR(mode) (((mode) & (_S_IFMT)) == (_S_IFDIR))
630 #define S_ISREG(mode) (((mode) & (_S_IFMT)) == (_S_IFREG))
633 /* work out what fcntl flag to use for non-blocking */
635 # define NONBLOCK_FLAG O_NONBLOCK
637 # define NONBLOCK_FLAG O_NDELAY
639 # define NONBLOCK_FLAG FNDELAY
642 #ifndef INADDR_LOOPBACK
643 #define INADDR_LOOPBACK 0x7f000001
647 #define INADDR_NONE 0xffffffff
650 #define IS_DEVICE(mode) (S_ISCHR(mode) || S_ISBLK(mode) || S_ISSOCK(mode) || S_ISFIFO(mode))
652 /* Initial mask on permissions given to temporary files. Mask off setuid
653 bits and group access because of potential race-condition security
654 holes, and mask other access because mode 707 is bizarre */
655 #define INITACCESSPERMS 0700
657 /* handler for null strings in printf format */
658 #define NS(s) ((s)?(s):"<NULL>")
660 #if !defined(__GNUC__) || defined(APPLE)
661 /* Apparently the OS X port of gcc gags on __attribute__.
663 * <http://www.opensource.apple.com/bugs/X/gcc/2512150.html> */
664 #define __attribute__(x)
668 /* Convenient wrappers for malloc and realloc. Use them. */
669 #define new(type) ((type *)malloc(sizeof(type)))
670 #define new_array(type, num) ((type *)_new_array(sizeof(type), (num)))
671 #define realloc_array(ptr, type, num) ((type *)_realloc_array((ptr), sizeof(type), (num)))
673 /* use magic gcc attributes to catch format errors */
674 void rprintf(enum logcode , const char *, ...)
675 __attribute__((format (printf, 2, 3)))
678 /* This is just like rprintf, but it also tries to print some
679 * representation of the error code. Normally errcode = errno. */
680 void rsyserr(enum logcode, int, const char *, ...)
681 __attribute__((format (printf, 3, 4)))
684 #ifdef REPLACE_INET_NTOA
685 #define inet_ntoa rep_inet_ntoa
688 /* Make sure that the O_BINARY flag is defined. */
694 size_t strlcpy(char *d, const char *s, size_t bufsize);
698 size_t strlcat(char *d, const char *s, size_t bufsize);
702 #define WEXITSTATUS(stat) ((int)(((stat)>>8)&0xFF))
705 #define exit_cleanup(code) _exit_cleanup(code, __FILE__, __LINE__)
710 #ifndef HAVE_INET_NTOP
712 inet_ntop(int af, const void *src, char *dst, size_t size);
713 #endif /* !HAVE_INET_NTOP */
715 #ifndef HAVE_INET_PTON
716 int inet_pton(int af, const char *src, void *dst);
719 #ifdef MAINTAINER_MODE
720 const char *get_panic_action(void);
723 #define UNUSED(x) x __attribute__((__unused__))
725 extern const char *io_write_phase, *io_read_phase;