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 /* update this if you make incompatible changes */
58 #define PROTOCOL_VERSION 28
60 /* We refuse to interoperate with versions that are not in this range.
61 * Note that we assume we'll work with later versions: the onus is on
62 * people writing them to make sure that they don't send us anything
63 * we won't understand.
65 * Interoperation with old but supported protocol versions
66 * should cause a warning to be printed. At a future date
67 * the old protocol will become the minimum and
68 * compatibility code removed.
70 * There are two possible explanations for the limit at
71 * MAX_PROTOCOL_VERSION: either to allow new major-rev versions that
72 * do not interoperate with us, and (more likely) so that we can
73 * detect an attempt to connect rsync to a non-rsync server, which is
74 * unlikely to begin by sending a byte between MIN_PROTOCL_VERSION and
75 * MAX_PROTOCOL_VERSION. */
77 #define MIN_PROTOCOL_VERSION 19
78 #define OLD_PROTOCOL_VERSION 20
79 #define MAX_PROTOCOL_VERSION 40
81 #define RSYNC_PORT 873
83 #define SPARSE_WRITE_SIZE (1024)
84 #define WRITE_SIZE (32*1024)
85 #define CHUNK_SIZE (32*1024)
86 #define MAX_MAP_SIZE (256*1024)
87 #define IO_BUFFER_SIZE (4092)
89 #define IOERR_GENERAL (1<<0) /* For backward compatibility, this must == 1 */
90 #define IOERR_VANISHED (1<<1)
97 #define SERVER_EXCLUDES 1
98 #define ALL_EXCLUDES 2
101 #define MISSING_FATAL 1
103 #define ADD_INCLUDE 1
104 #define ADD_EXCLUDE 0
106 /* Log values. I *think* what these mean is: FLOG goes to the server
107 * logfile; FERROR and FINFO try to end up on the client, with
108 * different levels of filtering. */
109 enum logcode {FNONE=0, FERROR=1, FINFO=2, FLOG=3 };
115 /* The default RSYNC_RSH is always set in config.h. */
117 #include <sys/types.h>
125 #ifdef HAVE_SYS_PARAM_H
126 #include <sys/param.h>
133 #if defined(HAVE_MALLOC_H) && (defined(HAVE_MALLINFO) || !defined(HAVE_STDLIB_H))
137 #ifdef HAVE_SYS_SOCKET_H
138 #include <sys/socket.h>
145 #ifdef TIME_WITH_SYS_TIME
146 #include <sys/time.h>
149 #ifdef HAVE_SYS_TIME_H
150 #include <sys/time.h>
159 #ifdef HAVE_SYS_FCNTL_H
160 #include <sys/fcntl.h>
164 #include <sys/stat.h>
166 #ifdef HAVE_SYS_IOCTL_H
167 #include <sys/ioctl.h>
170 #ifdef HAVE_SYS_FILIO_H
171 #include <sys/filio.h>
175 #ifdef HAVE_SYS_WAIT_H
176 #include <sys/wait.h>
190 #ifdef HAVE_SYS_SELECT_H
191 #include <sys/select.h>
194 #ifdef HAVE_SYS_MODE_H
195 /* apparently AIX needs this for S_ISLNK */
197 #include <sys/mode.h>
205 /* these are needed for the uid/gid mapping code */
210 #include <netinet/in.h>
211 #include <arpa/inet.h>
214 #include <sys/file.h>
219 # define dirent direct
221 # include <sys/ndir.h>
224 # include <sys/dir.h>
241 #define uchar unsigned char
244 #if HAVE_UNSIGNED_CHAR
245 #define schar signed char
251 #if (SIZEOF_INT == 4)
253 #elif (SIZEOF_LONG == 4)
255 #elif (SIZEOF_SHORT == 4)
258 /* I hope this works */
265 #define uint32 unsigned int32
269 #define OFF_T off64_t
270 #define STRUCT_STAT struct stat64
273 #define STRUCT_STAT struct stat
277 #define int64 off64_t
278 #elif (SIZEOF_LONG == 8)
280 #elif (SIZEOF_INT == 8)
283 #define int64 long long
285 /* As long as it gets... */
290 #if (SIZEOF_LONG == 8)
291 #define uint64 unsigned long
292 #elif (SIZEOF_INT == 8)
293 #define uint64 unsigned int
295 #define uint64 unsigned long long
297 /* As long as it gets... */
298 #define uint64 unsigned off_t
301 /* Starting from protocol version 26, we always use 64-bit
302 * ino_t and dev_t internally, even if this platform does not
303 * allow files to have 64-bit inums. That's because the
304 * receiver needs to find duplicate (dev,ino) tuples to detect
305 * hardlinks, and it might have files coming from a platform
306 * that has 64-bit inums.
308 * The only exception is if we're on a platform with no 64-bit type at
311 * Because we use read_longint() to get these off the wire, if you
312 * transfer devices or hardlinks with dev or inum > 2**32 to a machine
313 * with no 64-bit types then you will get an overflow error. Probably
314 * not many people have that combination of machines, and you can
315 * avoid it by not preserving hardlinks or not transferring device
316 * nodes. It's not clear that any other behaviour is better.
318 * Note that if you transfer devices from a 64-bit-devt machine (say,
319 * Solaris) to a 32-bit-devt machine (say, Linux-2.2/x86) then the
320 * device numbers will be truncated. But it's a kind of silly thing
323 * FIXME: In future, we should probable split the device number into
324 * major/minor, and transfer the two parts as 32-bit ints. That gives
325 * you somewhat more of a chance that they'll come from a big machine
326 * to a little one in a useful way.
328 * FIXME: Really we need an unsigned type, and we perhaps ought to
329 * cope with platforms on which this is an unsigned int or even a
332 #define INO64_T uint64
333 #define DEV64_T uint64
336 #define MIN(a,b) ((a)<(b)?(a):(b))
340 #define MAX(a,b) ((a)>(b)?(a):(b))
343 #ifndef MAXHOSTNAMELEN
344 #define MAXHOSTNAMELEN 256
347 /* the length of the md4 checksum */
348 #define MD4_SUM_LENGTH 16
349 #define SUM_LENGTH 16
350 #define SHORT_SUM_LENGTH 2
351 #define BLOCKSUM_BIAS 10
354 #define MAXPATHLEN 1024
362 #define INADDR_NONE 0xffffffff
365 #ifndef IN_LOOPBACKNET
366 #define IN_LOOPBACKNET 127
369 #define GID_NONE (gid_t) -1
377 /** Device this file lives upon */
380 /** If this is a device node, the device number. */
389 unsigned short flags;
393 #define ARENA_SIZE (32 * 1024)
399 struct string_area *next;
405 struct file_struct **files;
406 struct string_area *string_area;
410 OFF_T offset; /**< offset in file of this chunk */
411 unsigned int len; /**< length of chunk of file */
412 int i; /**< index of this chunk */
413 uint32 sum1; /**< simple checksum */
414 char sum2[SUM_LENGTH]; /**< checksum */
418 OFF_T flength; /**< total file length */
419 size_t count; /**< how many chunks */
420 unsigned int blength; /**< block_length */
421 unsigned int remainder; /**< flength % block_length */
422 int s2length; /**< sum2_length */
423 struct sum_buf *sums; /**< points to info for each chunk */
427 char *p; /* Window pointer */
428 int fd; /* File Descriptor */
429 int p_size; /* Window size at allocation */
430 int p_len; /* Window size after fill */
431 /* p_size and p_len could be
432 * consolodated by using a local
433 * variable in map_ptr() */
434 int status; /* first errno from read errors */
435 OFF_T file_size; /* File size (from stat) */
436 OFF_T p_offset; /* Window start */
437 OFF_T p_fd_offset; /* offset of cursor in fd ala lseek */
440 #define MATCHFLG_WILD (1<<0) /* pattern has '*', '[', and/or '?' */
441 #define MATCHFLG_WILD2 (1<<1) /* pattern has '**' */
442 #define MATCHFLG_WILD2_PREFIX (1<<2) /* pattern starts with '**' */
443 #define MATCHFLG_ABS_PATH (1<<3) /* path-match on absolute path */
444 struct exclude_struct {
454 int64 total_transferred_size;
461 int num_transferred_files;
465 /* we need this function because of the silly way in which duplicate
466 entries are handled in the file lists - we can't change this
467 without breaking existing versions */
468 static inline int flist_up(struct file_list *flist, int i)
470 while (!flist->files[i]->basename) i++;
474 #include "byteorder.h"
475 #include "lib/mdfour.h"
476 #include "lib/wildmatch.h"
477 #include "lib/permstring.h"
478 #include "lib/addrinfo.h"
482 /* We have replacement versions of these if they're missing. */
483 #ifndef HAVE_ASPRINTF
484 int asprintf(char **ptr, const char *format, ...);
487 #ifndef HAVE_VASPRINTF
488 int vasprintf(char **ptr, const char *format, va_list ap);
491 #if !defined(HAVE_VSNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
492 #define vsnprintf rsync_vsnprintf
493 int vsnprintf(char *str, size_t count, const char *fmt, va_list args);
496 #if !defined(HAVE_SNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
497 #define snprintf rsync_snprintf
498 int snprintf(char *str,size_t count,const char *fmt,...);
503 extern char *sys_errlist[];
504 #define strerror(i) sys_errlist[i]
508 # define strchr index
509 # define strrchr rindex
512 #ifndef HAVE_ERRNO_DECL
516 #define SUPPORT_LINKS HAVE_READLINK
517 #define SUPPORT_HARD_LINKS HAVE_LINK
519 /* This could be bad on systems which have no lchown and where chown
520 * follows symbollic links. On such systems it might be better not to
521 * try to chown symlinks at all. */
526 #define SIGNAL_CAST (RETSIGTYPE (*)())
529 #define EWOULDBLOCK EAGAIN
533 #define STDIN_FILENO 0
536 #ifndef STDOUT_FILENO
537 #define STDOUT_FILENO 1
540 #ifndef STDERR_FILENO
541 #define STDERR_FILENO 2
549 #define ACCESSPERMS 0777
556 #define CHMOD_BITS (S_ISUID | S_ISGID | S_ISVTX | ACCESSPERMS)
559 #define _S_IFMT 0170000
563 #define _S_IFLNK 0120000
567 #define S_ISLNK(mode) (((mode) & (_S_IFMT)) == (_S_IFLNK))
571 #define S_ISBLK(mode) (((mode) & (_S_IFMT)) == (_S_IFBLK))
575 #define S_ISCHR(mode) (((mode) & (_S_IFMT)) == (_S_IFCHR))
580 #define S_ISSOCK(mode) (((mode) & (_S_IFMT)) == (_S_IFSOCK))
582 #define S_ISSOCK(mode) (0)
588 #define S_ISFIFO(mode) (((mode) & (_S_IFMT)) == (_S_IFIFO))
590 #define S_ISFIFO(mode) (0)
595 #define S_ISDIR(mode) (((mode) & (_S_IFMT)) == (_S_IFDIR))
599 #define S_ISREG(mode) (((mode) & (_S_IFMT)) == (_S_IFREG))
602 /* work out what fcntl flag to use for non-blocking */
604 # define NONBLOCK_FLAG O_NONBLOCK
606 # define NONBLOCK_FLAG O_NDELAY
608 # define NONBLOCK_FLAG FNDELAY
611 #ifndef INADDR_LOOPBACK
612 #define INADDR_LOOPBACK 0x7f000001
616 #define INADDR_NONE 0xffffffff
619 #define IS_DEVICE(mode) (S_ISCHR(mode) || S_ISBLK(mode) || S_ISSOCK(mode) || S_ISFIFO(mode))
621 /* Initial mask on permissions given to temporary files. Mask off setuid
622 bits and group access because of potential race-condition security
623 holes, and mask other access because mode 707 is bizarre */
624 #define INITACCESSPERMS 0700
626 /* handler for null strings in printf format */
627 #define NS(s) ((s)?(s):"<NULL>")
629 #if !defined(__GNUC__) || defined(APPLE)
630 /* Apparently the OS X port of gcc gags on __attribute__.
632 * <http://www.opensource.apple.com/bugs/X/gcc/2512150.html> */
633 #define __attribute__(x)
637 /* Convenient wrappers for malloc and realloc. Use them. */
638 #define new(type) ((type *)malloc(sizeof(type)))
639 #define new_array(type, num) ((type *)_new_array(sizeof(type), (num)))
640 #define realloc_array(ptr, type, num) ((type *)_realloc_array((ptr), sizeof(type), (num)))
642 /* use magic gcc attributes to catch format errors */
643 void rprintf(enum logcode , const char *, ...)
644 __attribute__((format (printf, 2, 3)))
647 /* This is just like rprintf, but it also tries to print some
648 * representation of the error code. Normally errcode = errno. */
649 void rsyserr(enum logcode, int, const char *, ...)
650 __attribute__((format (printf, 3, 4)))
653 #ifdef REPLACE_INET_NTOA
654 #define inet_ntoa rep_inet_ntoa
657 /* Make sure that the O_BINARY flag is defined. */
663 size_t strlcpy(char *d, const char *s, size_t bufsize);
667 size_t strlcat(char *d, const char *s, size_t bufsize);
671 #define WEXITSTATUS(stat) ((int)(((stat)>>8)&0xFF))
674 #define exit_cleanup(code) _exit_cleanup(code, __FILE__, __LINE__)
679 #ifndef HAVE_INET_NTOP
681 inet_ntop(int af, const void *src, char *dst, size_t size);
682 #endif /* !HAVE_INET_NTOP */
684 #ifndef HAVE_INET_PTON
685 int inet_pton(int af, const char *src, void *dst);
688 #ifdef MAINTAINER_MODE
689 const char *get_panic_action(void);
692 #define UNUSED(x) x __attribute__((__unused__))
694 extern const char *io_write_phase, *io_read_phase;