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 26
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 thirty: either
66 * to allow new major-rev versions that do not interoperate with us,
67 * and (more likely) so that we can detect an attempt to connect rsync
68 * to a non-rsync server, which is unlikely to begin by sending a byte
69 * between 15 and 30. */
70 #define MIN_PROTOCOL_VERSION 15
71 #define OLD_PROTOCOL_VERSION 20
72 #define MAX_PROTOCOL_VERSION 40
74 #define RSYNC_PORT 873
76 #define SPARSE_WRITE_SIZE (1024)
77 #define WRITE_SIZE (32*1024)
78 #define CHUNK_SIZE (32*1024)
79 #define MAX_MAP_SIZE (256*1024)
80 #define IO_BUFFER_SIZE (4092)
86 /* Log values. I *think* what these mean is: FLOG goes to the server
87 * logfile; FERROR and FINFO try to end up on the client, with
88 * different levels of filtering. */
89 enum logcode {FNONE=0, FERROR=1, FINFO=2, FLOG=3 };
95 /* The default RSYNC_RSH is always set in config.h, either to "remsh",
96 * "rsh", or otherwise something specified by the user. HAVE_REMSH
97 * controls parameter munging for HP/UX, etc. */
99 #include <sys/types.h>
107 #ifdef HAVE_SYS_PARAM_H
108 #include <sys/param.h>
115 #ifdef HAVE_SYS_SOCKET_H
116 #include <sys/socket.h>
127 #ifdef TIME_WITH_SYS_TIME
128 #include <sys/time.h>
131 #ifdef HAVE_SYS_TIME_H
132 #include <sys/time.h>
141 #ifdef HAVE_SYS_FCNTL_H
142 #include <sys/fcntl.h>
146 #include <sys/stat.h>
148 #ifdef HAVE_SYS_IOCTL_H
149 #include <sys/ioctl.h>
152 #ifdef HAVE_SYS_FILIO_H
153 #include <sys/filio.h>
157 #ifdef HAVE_SYS_WAIT_H
158 #include <sys/wait.h>
172 #ifdef HAVE_SYS_SELECT_H
173 #include <sys/select.h>
176 #ifdef HAVE_SYS_MODE_H
177 /* apparently AIX needs this for S_ISLNK */
179 #include <sys/mode.h>
186 #include "lib/fnmatch.h"
197 /* these are needed for the uid/gid mapping code */
202 #include <netinet/in.h>
203 #include <arpa/inet.h>
206 #include <sys/file.h>
211 # define dirent direct
213 # include <sys/ndir.h>
216 # include <sys/dir.h>
233 #define uchar unsigned char
236 #if HAVE_UNSIGNED_CHAR
237 #define schar signed char
243 #if (SIZEOF_INT == 4)
245 #elif (SIZEOF_LONG == 4)
247 #elif (SIZEOF_SHORT == 4)
250 /* I hope this works */
257 #define uint32 unsigned int32
261 #define OFF_T off64_t
262 #define STRUCT_STAT struct stat64
265 #define STRUCT_STAT struct stat
269 #define int64 off64_t
270 #elif (SIZEOF_LONG == 8)
272 #elif (SIZEOF_INT == 8)
275 #define int64 long long
277 /* As long as it gets... */
282 #if (SIZEOF_LONG == 8)
283 #define uint64 unsigned long
284 #elif (SIZEOF_INT == 8)
285 #define uint64 unsigned int
287 #define uint64 unsigned long long
289 /* As long as it gets... */
290 #define uint64 unsigned off_t
293 /* Starting from protocol version 26, we always use 64-bit
294 * ino_t and dev_t internally, even if this platform does not
295 * allow files to have 64-bit inums. That's because the
296 * receiver needs to find duplicate (dev,ino) tuples to detect
297 * hardlinks, and it might have files coming from a platform
298 * that has 64-bit inums.
300 * The only exception is if we're on a platform with no 64-bit type at
303 * Because we use read_longint() to get these off the wire, if you
304 * transfer devices or hardlinks with dev or inum > 2**32 to a machine
305 * with no 64-bit types then you will get an overflow error. Probably
306 * not many people have that combination of machines, and you can
307 * avoid it by not preserving hardlinks or not transferring device
308 * nodes. It's not clear that any other behaviour is better.
310 * Note that if you transfer devices from a 64-bit-devt machine (say,
311 * Solaris) to a 32-bit-devt machine (say, Linux-2.2/x86) then the
312 * device numbers will be truncated. But it's a kind of silly thing
315 * FIXME: In future, we should probable split the device number into
316 * major/minor, and transfer the two parts as 32-bit ints. That gives
317 * you somewhat more of a chance that they'll come from a big machine
318 * to a little one in a useful way.
320 * FIXME: Really we need an unsigned type, and we perhaps ought to
321 * cope with platforms on which this is an unsigned int or even a
324 #define INO64_T uint64
325 #define DEV64_T uint64
328 #define MIN(a,b) ((a)<(b)?(a):(b))
332 #define MAX(a,b) ((a)>(b)?(a):(b))
335 #ifndef MAXHOSTNAMELEN
336 #define MAXHOSTNAMELEN 256
339 /* the length of the md4 checksum */
340 #define MD4_SUM_LENGTH 16
341 #define SUM_LENGTH 16
344 #define MAXPATHLEN 1024
352 #define INADDR_NONE 0xffffffff
355 #ifndef IN_LOOPBACKNET
356 #define IN_LOOPBACKNET 127
366 /** Device this file lives upon */
369 /** If this is a device node, the device number. */
381 #define ARENA_SIZE (32 * 1024)
387 struct string_area *next;
393 struct file_struct **files;
394 struct string_area *string_area;
398 OFF_T offset; /**< offset in file of this chunk */
399 int len; /**< length of chunk of file */
400 int i; /**< index of this chunk */
401 uint32 sum1; /**< simple checksum */
402 char sum2[SUM_LENGTH]; /**< checksum */
406 OFF_T flength; /**< total file length */
407 size_t count; /**< how many chunks */
408 size_t remainder; /**< flength % block_length */
409 size_t n; /**< block_length */
410 struct sum_buf *sums; /**< points to info for each chunk */
416 OFF_T file_size, p_offset, p_fd_offset;
419 struct exclude_struct {
430 int64 total_transferred_size;
437 int num_transferred_files;
441 /* we need this function because of the silly way in which duplicate
442 entries are handled in the file lists - we can't change this
443 without breaking existing versions */
444 static inline int flist_up(struct file_list *flist, int i)
446 while (!flist->files[i]->basename) i++;
450 #include "byteorder.h"
451 #include "lib/mdfour.h"
452 #include "lib/permstring.h"
453 #include "lib/addrinfo.h"
457 /* We have replacement versions of these if they're missing. */
458 #ifndef HAVE_ASPRINTF
459 int asprintf(char **ptr, const char *format, ...);
462 #ifndef HAVE_VASPRINTF
463 int vasprintf(char **ptr, const char *format, va_list ap);
466 #if !defined(HAVE_VSNPRINTF) && !defined(HAVE_C99_VSNPRINTF)
467 int vsnprintf (char *str, size_t count, const char *fmt, va_list args);
470 #if !defined(HAVE_SNPRINTF) && !defined(HAVE_C99_VSNPRINTF)
471 int snprintf(char *str,size_t count,const char *fmt,...);
476 extern char *sys_errlist[];
477 #define strerror(i) sys_errlist[i]
481 # define strchr index
482 # define strrchr rindex
485 #ifndef HAVE_ERRNO_DECL
489 #define SUPPORT_LINKS HAVE_READLINK
490 #define SUPPORT_HARD_LINKS HAVE_LINK
492 /* This could be bad on systems which have no lchown and where chown
493 * follows symbollic links. On such systems it might be better not to
494 * try to chown symlinks at all. */
499 #define SIGNAL_CAST (RETSIGTYPE (*)())
502 #define EWOULDBLOCK EAGAIN
506 #define STDIN_FILENO 0
509 #ifndef STDOUT_FILENO
510 #define STDOUT_FILENO 1
513 #ifndef STDERR_FILENO
514 #define STDERR_FILENO 2
522 #define ACCESSPERMS 0777
529 #define CHMOD_BITS (S_ISUID | S_ISGID | S_ISVTX | ACCESSPERMS)
532 #define _S_IFMT 0170000
536 #define _S_IFLNK 0120000
540 #define S_ISLNK(mode) (((mode) & (_S_IFMT)) == (_S_IFLNK))
544 #define S_ISBLK(mode) (((mode) & (_S_IFMT)) == (_S_IFBLK))
548 #define S_ISCHR(mode) (((mode) & (_S_IFMT)) == (_S_IFCHR))
553 #define S_ISSOCK(mode) (((mode) & (_S_IFMT)) == (_S_IFSOCK))
555 #define S_ISSOCK(mode) (0)
561 #define S_ISFIFO(mode) (((mode) & (_S_IFMT)) == (_S_IFIFO))
563 #define S_ISFIFO(mode) (0)
568 #define S_ISDIR(mode) (((mode) & (_S_IFMT)) == (_S_IFDIR))
572 #define S_ISREG(mode) (((mode) & (_S_IFMT)) == (_S_IFREG))
575 /* work out what fcntl flag to use for non-blocking */
577 # define NONBLOCK_FLAG O_NONBLOCK
579 # define NONBLOCK_FLAG O_NDELAY
581 # define NONBLOCK_FLAG FNDELAY
584 #ifndef INADDR_LOOPBACK
585 #define INADDR_LOOPBACK 0x7f000001
589 #define INADDR_NONE 0xffffffff
592 #define IS_DEVICE(mode) (S_ISCHR(mode) || S_ISBLK(mode) || S_ISSOCK(mode) || S_ISFIFO(mode))
594 /* Initial mask on permissions given to temporary files. Mask off setuid
595 bits and group access because of potential race-condition security
596 holes, and mask other access because mode 707 is bizarre */
597 #define INITACCESSPERMS 0700
599 /* handler for null strings in printf format */
600 #define NS(s) ((s)?(s):"<NULL>")
602 #if !defined(__GNUC__) || defined(APPLE)
603 /* Apparently the OS X port of gcc gags on __attribute__.
605 * <http://www.opensource.apple.com/bugs/X/gcc/2512150.html> */
606 #define __attribute__(x)
611 /* use magic gcc attributes to catch format errors */
612 void rprintf(enum logcode , const char *, ...)
613 __attribute__((format (printf, 2, 3)))
616 /* This is just like rprintf, but it also tries to print some
617 * representation of the error code. Normally errcode = errno. */
618 void rsyserr(enum logcode, int, const char *, ...)
619 __attribute__((format (printf, 3, 4)))
622 #ifdef REPLACE_INET_NTOA
623 #define inet_ntoa rep_inet_ntoa
628 size_t strlcpy(char *d, const char *s, size_t bufsize);
632 size_t strlcat(char *d, const char *s, size_t bufsize);
636 #define WEXITSTATUS(stat) ((int)(((stat)>>8)&0xFF))
639 #define exit_cleanup(code) _exit_cleanup(code, __FILE__, __LINE__)
644 #ifndef HAVE_INET_NTOP
646 inet_ntop(int af, const void *src, char *dst, size_t size);
647 #endif /* !HAVE_INET_NTOP */
649 #ifndef HAVE_INET_PTON
650 int inet_pton(int af, const char *src, void *dst);
653 #ifdef MAINTAINER_MODE
654 const char *get_panic_action(void);
657 #define UNUSED(x) x __attribute__((__unused__))
659 extern const char *io_write_phase, *io_read_phase;