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 OLD_SAME_RDEV EXTENDED_FLAGS
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)
55 /* update this if you make incompatible changes */
56 #define PROTOCOL_VERSION 27
58 /* We refuse to interoperate with versions that are not in this range.
59 * Note that we assume we'll work with later versions: the onus is on
60 * people writing them to make sure that they don't send us anything
61 * we won't understand.
63 * Interoperation with old but supported protocol versions
64 * should cause a warning to be printed. At a future date
65 * the old protocol will become the minimum and
66 * compatibility code removed.
68 * There are two possible explanations for the limit at
69 * MAX_PROTOCOL_VERSION: either to allow new major-rev versions that
70 * do not interoperate with us, and (more likely) so that we can
71 * detect an attempt to connect rsync to a non-rsync server, which is
72 * unlikely to begin by sending a byte between MIN_PROTOCL_VERSION and
73 * MAX_PROTOCOL_VERSION. */
75 #define MIN_PROTOCOL_VERSION 19
76 #define OLD_PROTOCOL_VERSION 20
77 #define MAX_PROTOCOL_VERSION 40
79 #define RSYNC_PORT 873
81 #define SPARSE_WRITE_SIZE (1024)
82 #define WRITE_SIZE (32*1024)
83 #define CHUNK_SIZE (32*1024)
84 #define MAX_MAP_SIZE (256*1024)
85 #define IO_BUFFER_SIZE (4092)
87 #define IOERR_GENERAL (1<<0) /* For backward compatibility, this must == 1 */
88 #define IOERR_VANISHED (1<<1)
95 #define SERVER_EXCLUDES 1
96 #define ALL_EXCLUDES 2
99 #define MISSING_FATAL 1
101 #define ADD_INCLUDE 1
102 #define ADD_EXCLUDE 0
104 /* Log values. I *think* what these mean is: FLOG goes to the server
105 * logfile; FERROR and FINFO try to end up on the client, with
106 * different levels of filtering. */
107 enum logcode {FNONE=0, FERROR=1, FINFO=2, FLOG=3 };
113 /* The default RSYNC_RSH is always set in config.h. */
115 #include <sys/types.h>
123 #ifdef HAVE_SYS_PARAM_H
124 #include <sys/param.h>
131 #if defined(HAVE_MALLOC_H) && (defined(HAVE_MALLINFO) || !defined(HAVE_STDLIB_H))
135 #ifdef HAVE_SYS_SOCKET_H
136 #include <sys/socket.h>
143 #ifdef TIME_WITH_SYS_TIME
144 #include <sys/time.h>
147 #ifdef HAVE_SYS_TIME_H
148 #include <sys/time.h>
157 #ifdef HAVE_SYS_FCNTL_H
158 #include <sys/fcntl.h>
162 #include <sys/stat.h>
164 #ifdef HAVE_SYS_IOCTL_H
165 #include <sys/ioctl.h>
168 #ifdef HAVE_SYS_FILIO_H
169 #include <sys/filio.h>
173 #ifdef HAVE_SYS_WAIT_H
174 #include <sys/wait.h>
188 #ifdef HAVE_SYS_SELECT_H
189 #include <sys/select.h>
192 #ifdef HAVE_SYS_MODE_H
193 /* apparently AIX needs this for S_ISLNK */
195 #include <sys/mode.h>
203 /* these are needed for the uid/gid mapping code */
208 #include <netinet/in.h>
209 #include <arpa/inet.h>
212 #include <sys/file.h>
217 # define dirent direct
219 # include <sys/ndir.h>
222 # include <sys/dir.h>
239 #define uchar unsigned char
242 #if HAVE_UNSIGNED_CHAR
243 #define schar signed char
249 #if (SIZEOF_INT == 4)
251 #elif (SIZEOF_LONG == 4)
253 #elif (SIZEOF_SHORT == 4)
256 /* I hope this works */
263 #define uint32 unsigned int32
267 #define OFF_T off64_t
268 #define STRUCT_STAT struct stat64
271 #define STRUCT_STAT struct stat
275 #define int64 off64_t
276 #elif (SIZEOF_LONG == 8)
278 #elif (SIZEOF_INT == 8)
281 #define int64 long long
283 /* As long as it gets... */
288 #if (SIZEOF_LONG == 8)
289 #define uint64 unsigned long
290 #elif (SIZEOF_INT == 8)
291 #define uint64 unsigned int
293 #define uint64 unsigned long long
295 /* As long as it gets... */
296 #define uint64 unsigned off_t
299 /* Starting from protocol version 26, we always use 64-bit
300 * ino_t and dev_t internally, even if this platform does not
301 * allow files to have 64-bit inums. That's because the
302 * receiver needs to find duplicate (dev,ino) tuples to detect
303 * hardlinks, and it might have files coming from a platform
304 * that has 64-bit inums.
306 * The only exception is if we're on a platform with no 64-bit type at
309 * Because we use read_longint() to get these off the wire, if you
310 * transfer devices or hardlinks with dev or inum > 2**32 to a machine
311 * with no 64-bit types then you will get an overflow error. Probably
312 * not many people have that combination of machines, and you can
313 * avoid it by not preserving hardlinks or not transferring device
314 * nodes. It's not clear that any other behaviour is better.
316 * Note that if you transfer devices from a 64-bit-devt machine (say,
317 * Solaris) to a 32-bit-devt machine (say, Linux-2.2/x86) then the
318 * device numbers will be truncated. But it's a kind of silly thing
321 * FIXME: In future, we should probable split the device number into
322 * major/minor, and transfer the two parts as 32-bit ints. That gives
323 * you somewhat more of a chance that they'll come from a big machine
324 * to a little one in a useful way.
326 * FIXME: Really we need an unsigned type, and we perhaps ought to
327 * cope with platforms on which this is an unsigned int or even a
330 #define INO64_T uint64
331 #define DEV64_T uint64
334 #define MIN(a,b) ((a)<(b)?(a):(b))
338 #define MAX(a,b) ((a)>(b)?(a):(b))
341 #ifndef MAXHOSTNAMELEN
342 #define MAXHOSTNAMELEN 256
345 /* the length of the md4 checksum */
346 #define MD4_SUM_LENGTH 16
347 #define SUM_LENGTH 16
348 #define SHORT_SUM_LENGTH 2
349 #define BLOCKSUM_BIAS 10
352 #define MAXPATHLEN 1024
360 #define INADDR_NONE 0xffffffff
363 #ifndef IN_LOOPBACKNET
364 #define IN_LOOPBACKNET 127
367 #define GID_NONE (gid_t) -1
375 /** Device this file lives upon */
378 /** If this is a device node, the device number. */
387 unsigned short flags;
391 #define ARENA_SIZE (32 * 1024)
397 struct string_area *next;
403 struct file_struct **files;
404 struct string_area *string_area;
408 OFF_T offset; /**< offset in file of this chunk */
409 unsigned int len; /**< length of chunk of file */
410 int i; /**< index of this chunk */
411 uint32 sum1; /**< simple checksum */
412 char sum2[SUM_LENGTH]; /**< checksum */
416 OFF_T flength; /**< total file length */
417 size_t count; /**< how many chunks */
418 unsigned int blength; /**< block_length */
419 unsigned int remainder; /**< flength % block_length */
420 int s2length; /**< sum2_length */
421 struct sum_buf *sums; /**< points to info for each chunk */
425 char *p; /* Window pointer */
426 int fd; /* File Descriptor */
427 int p_size; /* Window size at allocation */
428 int p_len; /* Window size after fill */
429 /* p_size and p_len could be
430 * consolodated by using a local
431 * variable in map_ptr() */
432 int status; /* first errno from read errors */
433 OFF_T file_size; /* File size (from stat) */
434 OFF_T p_offset; /* Window start */
435 OFF_T p_fd_offset; /* offset of cursor in fd ala lseek */
438 #define MATCHFLG_WILD (1<<0) /* pattern has '*', '[', and/or '?' */
439 #define MATCHFLG_WILD2 (1<<1) /* pattern has '**' */
440 #define MATCHFLG_WILD2_PREFIX (1<<2) /* pattern starts with '**' */
441 #define MATCHFLG_ABS_PATH (1<<3) /* path-match on absolute path */
442 struct exclude_struct {
452 int64 total_transferred_size;
459 int num_transferred_files;
463 /* we need this function because of the silly way in which duplicate
464 entries are handled in the file lists - we can't change this
465 without breaking existing versions */
466 static inline int flist_up(struct file_list *flist, int i)
468 while (!flist->files[i]->basename) i++;
472 #include "byteorder.h"
473 #include "lib/mdfour.h"
474 #include "lib/wildmatch.h"
475 #include "lib/permstring.h"
476 #include "lib/addrinfo.h"
480 /* We have replacement versions of these if they're missing. */
481 #ifndef HAVE_ASPRINTF
482 int asprintf(char **ptr, const char *format, ...);
485 #ifndef HAVE_VASPRINTF
486 int vasprintf(char **ptr, const char *format, va_list ap);
489 #if !defined(HAVE_VSNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
490 #define vsnprintf rsync_vsnprintf
491 int vsnprintf(char *str, size_t count, const char *fmt, va_list args);
494 #if !defined(HAVE_SNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
495 #define snprintf rsync_snprintf
496 int snprintf(char *str,size_t count,const char *fmt,...);
501 extern char *sys_errlist[];
502 #define strerror(i) sys_errlist[i]
506 # define strchr index
507 # define strrchr rindex
510 #ifndef HAVE_ERRNO_DECL
514 #define SUPPORT_LINKS HAVE_READLINK
515 #define SUPPORT_HARD_LINKS HAVE_LINK
517 /* This could be bad on systems which have no lchown and where chown
518 * follows symbollic links. On such systems it might be better not to
519 * try to chown symlinks at all. */
524 #define SIGNAL_CAST (RETSIGTYPE (*)())
527 #define EWOULDBLOCK EAGAIN
531 #define STDIN_FILENO 0
534 #ifndef STDOUT_FILENO
535 #define STDOUT_FILENO 1
538 #ifndef STDERR_FILENO
539 #define STDERR_FILENO 2
547 #define ACCESSPERMS 0777
554 #define CHMOD_BITS (S_ISUID | S_ISGID | S_ISVTX | ACCESSPERMS)
557 #define _S_IFMT 0170000
561 #define _S_IFLNK 0120000
565 #define S_ISLNK(mode) (((mode) & (_S_IFMT)) == (_S_IFLNK))
569 #define S_ISBLK(mode) (((mode) & (_S_IFMT)) == (_S_IFBLK))
573 #define S_ISCHR(mode) (((mode) & (_S_IFMT)) == (_S_IFCHR))
578 #define S_ISSOCK(mode) (((mode) & (_S_IFMT)) == (_S_IFSOCK))
580 #define S_ISSOCK(mode) (0)
586 #define S_ISFIFO(mode) (((mode) & (_S_IFMT)) == (_S_IFIFO))
588 #define S_ISFIFO(mode) (0)
593 #define S_ISDIR(mode) (((mode) & (_S_IFMT)) == (_S_IFDIR))
597 #define S_ISREG(mode) (((mode) & (_S_IFMT)) == (_S_IFREG))
600 /* work out what fcntl flag to use for non-blocking */
602 # define NONBLOCK_FLAG O_NONBLOCK
604 # define NONBLOCK_FLAG O_NDELAY
606 # define NONBLOCK_FLAG FNDELAY
609 #ifndef INADDR_LOOPBACK
610 #define INADDR_LOOPBACK 0x7f000001
614 #define INADDR_NONE 0xffffffff
617 #define IS_DEVICE(mode) (S_ISCHR(mode) || S_ISBLK(mode) || S_ISSOCK(mode) || S_ISFIFO(mode))
619 /* Initial mask on permissions given to temporary files. Mask off setuid
620 bits and group access because of potential race-condition security
621 holes, and mask other access because mode 707 is bizarre */
622 #define INITACCESSPERMS 0700
624 /* handler for null strings in printf format */
625 #define NS(s) ((s)?(s):"<NULL>")
627 #if !defined(__GNUC__) || defined(APPLE)
628 /* Apparently the OS X port of gcc gags on __attribute__.
630 * <http://www.opensource.apple.com/bugs/X/gcc/2512150.html> */
631 #define __attribute__(x)
635 /* Convenient wrappers for malloc and realloc. Use them. */
636 #define new(type) ((type *)malloc(sizeof(type)))
637 #define new_array(type, num) ((type *)_new_array(sizeof(type), (num)))
638 #define realloc_array(ptr, type, num) ((type *)_realloc_array((ptr), sizeof(type), (num)))
640 /* use magic gcc attributes to catch format errors */
641 void rprintf(enum logcode , const char *, ...)
642 __attribute__((format (printf, 2, 3)))
645 /* This is just like rprintf, but it also tries to print some
646 * representation of the error code. Normally errcode = errno. */
647 void rsyserr(enum logcode, int, const char *, ...)
648 __attribute__((format (printf, 3, 4)))
651 #ifdef REPLACE_INET_NTOA
652 #define inet_ntoa rep_inet_ntoa
655 /* Make sure that the O_BINARY flag is defined. */
661 size_t strlcpy(char *d, const char *s, size_t bufsize);
665 size_t strlcat(char *d, const char *s, size_t bufsize);
669 #define WEXITSTATUS(stat) ((int)(((stat)>>8)&0xFF))
672 #define exit_cleanup(code) _exit_cleanup(code, __FILE__, __LINE__)
677 #ifndef HAVE_INET_NTOP
679 inet_ntop(int af, const void *src, char *dst, size_t size);
680 #endif /* !HAVE_INET_NTOP */
682 #ifndef HAVE_INET_PTON
683 int inet_pton(int af, const char *src, void *dst);
686 #ifdef MAINTAINER_MODE
687 const char *get_panic_action(void);
690 #define UNUSED(x) x __attribute__((__unused__))
692 extern const char *io_write_phase, *io_read_phase;