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 only used during the flist transfer. */
44 #define XMIT_TOP_DIR (1<<0)
45 #define XMIT_SAME_MODE (1<<1)
46 #define XMIT_EXTENDED_FLAGS (1<<2)
47 #define XMIT_SAME_RDEV_pre28 XMIT_EXTENDED_FLAGS /* Only in protocols < 28 */
48 #define XMIT_SAME_UID (1<<3)
49 #define XMIT_SAME_GID (1<<4)
50 #define XMIT_SAME_NAME (1<<5)
51 #define XMIT_LONG_NAME (1<<6)
52 #define XMIT_SAME_TIME (1<<7)
53 #define XMIT_SAME_HIGH_RDEV (1<<8)
54 #define XMIT_HAS_IDEV_DATA (1<<9)
55 #define XMIT_SAME_DEV (1<<10)
57 /* These flags are used in the live flist data. */
59 #define FLAG_TOP_DIR (1<<0)
60 #define FLAG_HLINK_EOL (1<<1) /* generator only */
61 #define FLAG_MOUNT_POINT (1<<2) /* sender only */
63 /* update this if you make incompatible changes */
64 #define PROTOCOL_VERSION 28
66 /* We refuse to interoperate with versions that are not in this range.
67 * Note that we assume we'll work with later versions: the onus is on
68 * people writing them to make sure that they don't send us anything
69 * we won't understand.
71 * Interoperation with old but supported protocol versions
72 * should cause a warning to be printed. At a future date
73 * the old protocol will become the minimum and
74 * compatibility code removed.
76 * There are two possible explanations for the limit at
77 * MAX_PROTOCOL_VERSION: either to allow new major-rev versions that
78 * do not interoperate with us, and (more likely) so that we can
79 * detect an attempt to connect rsync to a non-rsync server, which is
80 * unlikely to begin by sending a byte between MIN_PROTOCL_VERSION and
81 * MAX_PROTOCOL_VERSION. */
83 #define MIN_PROTOCOL_VERSION 19
84 #define OLD_PROTOCOL_VERSION 20
85 #define MAX_PROTOCOL_VERSION 40
87 #define RSYNC_PORT 873
89 #define SPARSE_WRITE_SIZE (1024)
90 #define WRITE_SIZE (32*1024)
91 #define CHUNK_SIZE (32*1024)
92 #define MAX_MAP_SIZE (256*1024)
93 #define IO_BUFFER_SIZE (4092)
95 #define IOERR_GENERAL (1<<0) /* For backward compatibility, this must == 1 */
96 #define IOERR_VANISHED (1<<1)
102 #define NO_EXCLUDES 0
103 #define SERVER_EXCLUDES 1
104 #define ALL_EXCLUDES 2
107 #define MISSING_FATAL 1
109 #define ADD_INCLUDE 1
110 #define ADD_EXCLUDE 0
113 #define NORMAL_FLUSH 0
115 #define CLEAR_STRUCT 0
116 #define FREE_STRUCT 1
118 /* Log-message categories. FLOG is only used on the daemon side to
119 * output messages to the log file. */
120 enum logcode { FERROR=1, FINFO=2, FLOG=3 };
122 /* Messages types that are sent over the message channel. The logcode
123 * values must all be present here with identical numbers. */
125 MSG_DATA=0, /* raw data on the multiplexed stream */
126 MSG_ERROR=FERROR, MSG_INFO=FINFO, MSG_LOG=FLOG, /* remote logging */
127 MSG_REDO=4, /* reprocess indicated flist index */
128 MSG_DONE=5, /* current phase is done */
135 /* The default RSYNC_RSH is always set in config.h. */
137 #include <sys/types.h>
145 #ifdef HAVE_SYS_PARAM_H
146 #include <sys/param.h>
153 #if defined(HAVE_MALLOC_H) && (defined(HAVE_MALLINFO) || !defined(HAVE_STDLIB_H))
157 #ifdef HAVE_SYS_SOCKET_H
158 #include <sys/socket.h>
165 #ifdef TIME_WITH_SYS_TIME
166 #include <sys/time.h>
169 #ifdef HAVE_SYS_TIME_H
170 #include <sys/time.h>
179 #ifdef HAVE_SYS_FCNTL_H
180 #include <sys/fcntl.h>
184 #include <sys/stat.h>
186 #ifdef HAVE_SYS_IOCTL_H
187 #include <sys/ioctl.h>
190 #ifdef HAVE_SYS_FILIO_H
191 #include <sys/filio.h>
195 #ifdef HAVE_SYS_WAIT_H
196 #include <sys/wait.h>
210 #ifdef HAVE_SYS_SELECT_H
211 #include <sys/select.h>
214 #ifdef HAVE_SYS_MODE_H
215 /* apparently AIX needs this for S_ISLNK */
217 #include <sys/mode.h>
225 /* these are needed for the uid/gid mapping code */
230 #include <netinet/in.h>
231 #include <arpa/inet.h>
234 #include <sys/file.h>
239 # define dirent direct
241 # include <sys/ndir.h>
244 # include <sys/dir.h>
261 #define uchar unsigned char
264 #if HAVE_UNSIGNED_CHAR
265 #define schar signed char
271 #if (SIZEOF_INT == 4)
273 #elif (SIZEOF_LONG == 4)
275 #elif (SIZEOF_SHORT == 4)
278 /* I hope this works */
285 #define uint32 unsigned int32
289 #define OFF_T off64_t
290 #define STRUCT_STAT struct stat64
293 #define STRUCT_STAT struct stat
297 #define int64 off64_t
298 #elif (SIZEOF_LONG == 8)
300 #elif (SIZEOF_INT == 8)
303 #define int64 long long
305 /* As long as it gets... */
310 #if (SIZEOF_LONG == 8)
311 #define uint64 unsigned long
312 #elif (SIZEOF_INT == 8)
313 #define uint64 unsigned int
315 #define uint64 unsigned long long
317 /* As long as it gets... */
318 #define uint64 unsigned off_t
321 /* Starting from protocol version 26, we always use 64-bit
322 * ino_t and dev_t internally, even if this platform does not
323 * allow files to have 64-bit inums. That's because the
324 * receiver needs to find duplicate (dev,ino) tuples to detect
325 * hardlinks, and it might have files coming from a platform
326 * that has 64-bit inums.
328 * The only exception is if we're on a platform with no 64-bit type at
331 * Because we use read_longint() to get these off the wire, if you
332 * transfer devices or hardlinks with dev or inum > 2**32 to a machine
333 * with no 64-bit types then you will get an overflow error. Probably
334 * not many people have that combination of machines, and you can
335 * avoid it by not preserving hardlinks or not transferring device
336 * nodes. It's not clear that any other behaviour is better.
338 * Note that if you transfer devices from a 64-bit-devt machine (say,
339 * Solaris) to a 32-bit-devt machine (say, Linux-2.2/x86) then the
340 * device numbers will be truncated. But it's a kind of silly thing
343 * FIXME: In future, we should probable split the device number into
344 * major/minor, and transfer the two parts as 32-bit ints. That gives
345 * you somewhat more of a chance that they'll come from a big machine
346 * to a little one in a useful way.
348 * FIXME: Really we need an unsigned type, and we perhaps ought to
349 * cope with platforms on which this is an unsigned int or even a
352 #define INO64_T uint64
353 #define DEV64_T uint64
356 #define MIN(a,b) ((a)<(b)?(a):(b))
360 #define MAX(a,b) ((a)>(b)?(a):(b))
363 #ifndef MAXHOSTNAMELEN
364 #define MAXHOSTNAMELEN 256
367 /* the length of the md4 checksum */
368 #define MD4_SUM_LENGTH 16
369 #define SUM_LENGTH 16
370 #define SHORT_SUM_LENGTH 2
371 #define BLOCKSUM_BIAS 10
374 #define MAXPATHLEN 1024
382 #define INADDR_NONE 0xffffffff
385 #ifndef IN_LOOPBACKNET
386 #define IN_LOOPBACKNET 127
389 #define GID_NONE (gid_t) -1
391 #define HL_CHECK_MASTER 0
396 struct file_struct *next;
404 #define F_DEV link_u.idev->dev
405 #define F_INODE link_u.idev->inode
407 #define F_HLINDEX link_u.links->hlindex
408 #define F_NEXT link_u.links->next
415 DEV64_T rdev; /* The device number, if this is a device */
416 char *sum; /* Only a normal file can have a checksum */
417 char *link; /* Holds symlink string, if a symlink */
428 uchar flags; /* this item MUST remain last */
432 * Start the flist array at FLIST_START entries and grow it
433 * by doubling until FLIST_LINEAR then grow by FLIST_LINEAR
435 #define FLIST_START (32 * 1024)
436 #define FLIST_LINEAR (FLIST_START * 512)
442 struct string_area *next;
448 struct file_struct **files;
449 struct string_area *string_area;
453 OFF_T offset; /**< offset in file of this chunk */
454 unsigned int len; /**< length of chunk of file */
455 int i; /**< index of this chunk */
456 uint32 sum1; /**< simple checksum */
457 char sum2[SUM_LENGTH]; /**< checksum */
461 OFF_T flength; /**< total file length */
462 size_t count; /**< how many chunks */
463 unsigned int blength; /**< block_length */
464 unsigned int remainder; /**< flength % block_length */
465 int s2length; /**< sum2_length */
466 struct sum_buf *sums; /**< points to info for each chunk */
470 char *p; /* Window pointer */
471 int fd; /* File Descriptor */
472 int p_size; /* Window size at allocation */
473 int p_len; /* Window size after fill */
474 /* p_size and p_len could be
475 * consolodated by using a local
476 * variable in map_ptr() */
477 int status; /* first errno from read errors */
478 OFF_T file_size; /* File size (from stat) */
479 OFF_T p_offset; /* Window start */
480 OFF_T p_fd_offset; /* offset of cursor in fd ala lseek */
483 #define MATCHFLG_WILD (1<<0) /* pattern has '*', '[', and/or '?' */
484 #define MATCHFLG_WILD2 (1<<1) /* pattern has '**' */
485 #define MATCHFLG_WILD2_PREFIX (1<<2) /* pattern starts with '**' */
486 #define MATCHFLG_ABS_PATH (1<<3) /* path-match on absolute path */
487 struct exclude_struct {
497 int64 total_transferred_size;
504 int num_transferred_files;
505 int current_file_index;
509 /* we need this function because of the silly way in which duplicate
510 entries are handled in the file lists - we can't change this
511 without breaking existing versions */
512 static inline int flist_up(struct file_list *flist, int i)
514 while (!flist->files[i]->basename) i++;
518 #include "byteorder.h"
519 #include "lib/mdfour.h"
520 #include "lib/wildmatch.h"
521 #include "lib/permstring.h"
522 #include "lib/addrinfo.h"
526 /* We have replacement versions of these if they're missing. */
527 #ifndef HAVE_ASPRINTF
528 int asprintf(char **ptr, const char *format, ...);
531 #ifndef HAVE_VASPRINTF
532 int vasprintf(char **ptr, const char *format, va_list ap);
535 #if !defined(HAVE_VSNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
536 #define vsnprintf rsync_vsnprintf
537 int vsnprintf(char *str, size_t count, const char *fmt, va_list args);
540 #if !defined(HAVE_SNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
541 #define snprintf rsync_snprintf
542 int snprintf(char *str,size_t count,const char *fmt,...);
547 extern char *sys_errlist[];
548 #define strerror(i) sys_errlist[i]
552 # define strchr index
553 # define strrchr rindex
556 #ifndef HAVE_ERRNO_DECL
560 #define SUPPORT_LINKS HAVE_READLINK
561 #define SUPPORT_HARD_LINKS HAVE_LINK
563 /* This could be bad on systems which have no lchown and where chown
564 * follows symbollic links. On such systems it might be better not to
565 * try to chown symlinks at all. */
570 #define SIGNAL_CAST (RETSIGTYPE (*)())
573 #define EWOULDBLOCK EAGAIN
577 #define STDIN_FILENO 0
580 #ifndef STDOUT_FILENO
581 #define STDOUT_FILENO 1
584 #ifndef STDERR_FILENO
585 #define STDERR_FILENO 2
593 #define ACCESSPERMS 0777
600 #define CHMOD_BITS (S_ISUID | S_ISGID | S_ISVTX | ACCESSPERMS)
603 #define _S_IFMT 0170000
607 #define _S_IFLNK 0120000
611 #define S_ISLNK(mode) (((mode) & (_S_IFMT)) == (_S_IFLNK))
615 #define S_ISBLK(mode) (((mode) & (_S_IFMT)) == (_S_IFBLK))
619 #define S_ISCHR(mode) (((mode) & (_S_IFMT)) == (_S_IFCHR))
624 #define S_ISSOCK(mode) (((mode) & (_S_IFMT)) == (_S_IFSOCK))
626 #define S_ISSOCK(mode) (0)
632 #define S_ISFIFO(mode) (((mode) & (_S_IFMT)) == (_S_IFIFO))
634 #define S_ISFIFO(mode) (0)
639 #define S_ISDIR(mode) (((mode) & (_S_IFMT)) == (_S_IFDIR))
643 #define S_ISREG(mode) (((mode) & (_S_IFMT)) == (_S_IFREG))
646 /* work out what fcntl flag to use for non-blocking */
648 # define NONBLOCK_FLAG O_NONBLOCK
650 # define NONBLOCK_FLAG O_NDELAY
652 # define NONBLOCK_FLAG FNDELAY
655 #ifndef INADDR_LOOPBACK
656 #define INADDR_LOOPBACK 0x7f000001
660 #define INADDR_NONE 0xffffffff
663 #define IS_DEVICE(mode) (S_ISCHR(mode) || S_ISBLK(mode) || S_ISSOCK(mode) || S_ISFIFO(mode))
665 /* Initial mask on permissions given to temporary files. Mask off setuid
666 bits and group access because of potential race-condition security
667 holes, and mask other access because mode 707 is bizarre */
668 #define INITACCESSPERMS 0700
670 /* handler for null strings in printf format */
671 #define NS(s) ((s)?(s):"<NULL>")
673 #if !defined(__GNUC__) || defined(APPLE)
674 /* Apparently the OS X port of gcc gags on __attribute__.
676 * <http://www.opensource.apple.com/bugs/X/gcc/2512150.html> */
677 #define __attribute__(x)
681 /* Convenient wrappers for malloc and realloc. Use them. */
682 #define new(type) ((type *)malloc(sizeof(type)))
683 #define new_array(type, num) ((type *)_new_array(sizeof(type), (num)))
684 #define realloc_array(ptr, type, num) ((type *)_realloc_array((ptr), sizeof(type), (num)))
686 /* use magic gcc attributes to catch format errors */
687 void rprintf(enum logcode , const char *, ...)
688 __attribute__((format (printf, 2, 3)))
691 /* This is just like rprintf, but it also tries to print some
692 * representation of the error code. Normally errcode = errno. */
693 void rsyserr(enum logcode, int, const char *, ...)
694 __attribute__((format (printf, 3, 4)))
697 #ifdef REPLACE_INET_NTOA
698 #define inet_ntoa rep_inet_ntoa
701 /* Make sure that the O_BINARY flag is defined. */
707 size_t strlcpy(char *d, const char *s, size_t bufsize);
711 size_t strlcat(char *d, const char *s, size_t bufsize);
715 #define WEXITSTATUS(stat) ((int)(((stat)>>8)&0xFF))
718 #define exit_cleanup(code) _exit_cleanup(code, __FILE__, __LINE__)
721 #define MY_UID() geteuid()
723 #define MY_UID() getuid()
727 #define MY_GID() getegid()
729 #define MY_GID() getgid()
734 #ifndef HAVE_INET_NTOP
736 inet_ntop(int af, const void *src, char *dst, size_t size);
737 #endif /* !HAVE_INET_NTOP */
739 #ifndef HAVE_INET_PTON
740 int inet_pton(int af, const char *src, void *dst);
743 #ifdef MAINTAINER_MODE
744 const char *get_panic_action(void);
747 #define UNUSED(x) x __attribute__((__unused__))
749 extern const char *io_write_phase, *io_read_phase;