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 /* RSYNCD_SYSCONF is now set in config.h */
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_RDEV_MAJOR (1<<8)
54 #define XMIT_HAS_IDEV_DATA (1<<9)
55 #define XMIT_SAME_DEV (1<<10)
56 #define XMIT_RDEV_MINOR_IS_SMALL (1<<11)
58 /* These flags are used in the live flist data. */
60 #define FLAG_TOP_DIR (1<<0)
61 #define FLAG_HLINK_EOL (1<<1) /* generator only */
62 #define FLAG_MOUNT_POINT (1<<2) /* sender only */
64 /* update this if you make incompatible changes */
65 #define PROTOCOL_VERSION 28
67 /* We refuse to interoperate with versions that are not in this range.
68 * Note that we assume we'll work with later versions: the onus is on
69 * people writing them to make sure that they don't send us anything
70 * we won't understand.
72 * Interoperation with old but supported protocol versions
73 * should cause a warning to be printed. At a future date
74 * the old protocol will become the minimum and
75 * compatibility code removed.
77 * There are two possible explanations for the limit at
78 * MAX_PROTOCOL_VERSION: either to allow new major-rev versions that
79 * do not interoperate with us, and (more likely) so that we can
80 * detect an attempt to connect rsync to a non-rsync server, which is
81 * unlikely to begin by sending a byte between MIN_PROTOCL_VERSION and
82 * MAX_PROTOCOL_VERSION. */
84 #define MIN_PROTOCOL_VERSION 20
85 #define OLD_PROTOCOL_VERSION 25
86 #define MAX_PROTOCOL_VERSION 40
88 #define RSYNC_PORT 873
90 #define SPARSE_WRITE_SIZE (1024)
91 #define WRITE_SIZE (32*1024)
92 #define CHUNK_SIZE (32*1024)
93 #define MAX_MAP_SIZE (256*1024)
94 #define IO_BUFFER_SIZE (4092)
96 #define IOERR_GENERAL (1<<0) /* For backward compatibility, this must == 1 */
97 #define IOERR_VANISHED (1<<1)
101 #define MAX_BASIS_DIRS 20
105 #define NO_EXCLUDES 0
106 #define SERVER_EXCLUDES 1
107 #define ALL_EXCLUDES 2
109 #define XFLG_FATAL_ERRORS (1<<0)
110 #define XFLG_DEF_INCLUDE (1<<1)
111 #define XFLG_WORDS_ONLY (1<<2)
112 #define XFLG_WORD_SPLIT (1<<3)
113 #define XFLG_DIRECTORY (1<<4)
115 #define PERMS_REPORT (1<<0)
116 #define PERMS_SKIP_MTIME (1<<1)
119 #define NORMAL_FLUSH 0
121 #define PDIR_CREATE 1
122 #define PDIR_DELETE 0
124 #define FNAMECMP_BASIS_DIR 0x00
125 #define FNAMECMP_FNAME 0x80
126 #define FNAMECMP_PARTIAL_DIR 0x81
127 #define FNAMECMP_BACKUP 0x82
130 /* Log-message categories. FLOG is only used on the daemon side to
131 * output messages to the log file. */
132 enum logcode { FERROR=1, FINFO=2, FLOG=3 };
134 /* Messages types that are sent over the message channel. The logcode
135 * values must all be present here with identical numbers. */
137 MSG_DONE=5, /* current phase is done */
138 MSG_REDO=4, /* reprocess indicated flist index */
139 MSG_ERROR=FERROR, MSG_INFO=FINFO, MSG_LOG=FLOG, /* remote logging */
140 MSG_DATA=0 /* raw data on the multiplexed stream */
147 /* The default RSYNC_RSH is always set in config.h. */
149 #include <sys/types.h>
157 #ifdef HAVE_SYS_PARAM_H
158 #include <sys/param.h>
165 #if defined(HAVE_MALLOC_H) && (defined(HAVE_MALLINFO) || !defined(HAVE_STDLIB_H))
169 #ifdef HAVE_SYS_SOCKET_H
170 #include <sys/socket.h>
177 #ifdef TIME_WITH_SYS_TIME
178 #include <sys/time.h>
181 #ifdef HAVE_SYS_TIME_H
182 #include <sys/time.h>
191 #ifdef HAVE_SYS_FCNTL_H
192 #include <sys/fcntl.h>
196 #include <sys/stat.h>
198 #ifdef HAVE_SYS_IOCTL_H
199 #include <sys/ioctl.h>
202 #ifdef HAVE_SYS_FILIO_H
203 #include <sys/filio.h>
207 #ifdef HAVE_SYS_WAIT_H
208 #include <sys/wait.h>
222 #ifdef HAVE_SYS_SELECT_H
223 #include <sys/select.h>
226 #ifdef HAVE_SYS_MODE_H
227 /* apparently AIX needs this for S_ISLNK */
229 #include <sys/mode.h>
237 /* these are needed for the uid/gid mapping code */
242 #include <netinet/in.h>
243 #include <arpa/inet.h>
246 #include <sys/file.h>
251 # define dirent direct
253 # include <sys/ndir.h>
256 # include <sys/dir.h>
264 #include <sys/mkdev.h>
265 # if !defined(makedev) && defined(mkdev)
266 # define makedev mkdev
268 #elif MAJOR_IN_SYSMACROS
269 #include <sys/sysmacros.h>
278 #include "lib/pool_alloc.h"
283 #define uchar unsigned char
286 #if HAVE_UNSIGNED_CHAR
287 #define schar signed char
293 #if (SIZEOF_INT == 4)
295 #elif (SIZEOF_LONG == 4)
297 #elif (SIZEOF_SHORT == 4)
300 /* I hope this works */
307 #define uint32 unsigned int32
311 #define OFF_T off64_t
312 #define STRUCT_STAT struct stat64
315 #define STRUCT_STAT struct stat
319 #define int64 off64_t
320 #elif (SIZEOF_LONG == 8)
322 #elif (SIZEOF_INT == 8)
325 #define int64 long long
327 /* As long as it gets... */
329 #define INT64_IS_OFF_T
332 #if (SIZEOF_LONG == 8)
333 #define uint64 unsigned long
334 #elif (SIZEOF_INT == 8)
335 #define uint64 unsigned int
337 #define uint64 unsigned long long
339 /* As long as it gets... */
340 #define uint64 unsigned off_t
343 /* Starting from protocol version 26, we always use 64-bit
344 * ino_t and dev_t internally, even if this platform does not
345 * allow files to have 64-bit inums. That's because the
346 * receiver needs to find duplicate (dev,ino) tuples to detect
347 * hardlinks, and it might have files coming from a platform
348 * that has 64-bit inums.
350 * The only exception is if we're on a platform with no 64-bit type at
353 * Because we use read_longint() to get these off the wire, if you
354 * transfer devices or hardlinks with dev or inum > 2**32 to a machine
355 * with no 64-bit types then you will get an overflow error. Probably
356 * not many people have that combination of machines, and you can
357 * avoid it by not preserving hardlinks or not transferring device
358 * nodes. It's not clear that any other behaviour is better.
360 * Note that if you transfer devices from a 64-bit-devt machine (say,
361 * Solaris) to a 32-bit-devt machine (say, Linux-2.2/x86) then the
362 * device numbers will be truncated. But it's a kind of silly thing
365 * FIXME: I don't think the code in flist.c has ever worked on a system
366 * where dev_t is a struct.
375 #define MIN(a,b) ((a)<(b)?(a):(b))
379 #define MAX(a,b) ((a)>(b)?(a):(b))
382 #ifndef MAXHOSTNAMELEN
383 #define MAXHOSTNAMELEN 256
386 /* the length of the md4 checksum */
387 #define MD4_SUM_LENGTH 16
388 #define SUM_LENGTH 16
389 #define SHORT_SUM_LENGTH 2
390 #define BLOCKSUM_BIAS 10
393 #define MAXPATHLEN 1024
401 #define INADDR_NONE 0xffffffff
404 #ifndef IN_LOOPBACKNET
405 #define IN_LOOPBACKNET 127
408 #define GID_NONE ((gid_t)-1)
410 #define HL_CHECK_MASTER 0
415 struct file_struct *next;
418 #define F_DEV link_u.idev->dev
419 #define F_INODE link_u.idev->inode
421 #define F_HLINDEX link_u.links->hlindex
422 #define F_NEXT link_u.links->next
426 dev_t rdev; /* The device number, if this is a device */
427 char *sum; /* Only a normal file can have a checksum */
428 char *link; /* Points to symlink string, if a symlink */
442 uchar flags; /* this item MUST remain last */
446 * Start the flist array at FLIST_START entries and grow it
447 * by doubling until FLIST_LINEAR then grow by FLIST_LINEAR
449 #define FLIST_START (32 * 1024)
450 #define FLIST_LINEAR (FLIST_START * 512)
453 * Extent size for allocation pools A minimum size of 128KB
454 * is needed to mmap them so that freeing will release the
457 * Larger sizes reduce leftover fragments and speed free calls
458 * (when they happen) Smaller sizes increase the chance of
459 * freed allocations freeing whole extents.
461 #define FILE_EXTENT (256 * 1024)
462 #define HLINK_EXTENT (128 * 1024)
465 #define WITHOUT_HLINK 0
470 alloc_pool_t file_pool;
471 alloc_pool_t hlink_pool;
472 struct file_struct **files;
475 #define SUMFLG_SAME_OFFSET (1<<0)
478 OFF_T offset; /**< offset in file of this chunk */
479 unsigned int len; /**< length of chunk of file */
480 uint32 sum1; /**< simple checksum */
481 short flags; /**< flag bits */
482 char sum2[SUM_LENGTH]; /**< checksum */
486 OFF_T flength; /**< total file length */
487 size_t count; /**< how many chunks */
488 unsigned int blength; /**< block_length */
489 unsigned int remainder; /**< flength % block_length */
490 int s2length; /**< sum2_length */
491 struct sum_buf *sums; /**< points to info for each chunk */
495 char *p; /* Window pointer */
496 int fd; /* File Descriptor */
497 int p_size; /* Largest window size we allocated */
498 int p_len; /* Latest (rounded) window size */
499 int def_window_size; /* Default window size */
500 int status; /* first errno from read errors */
501 OFF_T file_size; /* File size (from stat) */
502 OFF_T p_offset; /* Window start */
503 OFF_T p_fd_offset; /* offset of cursor in fd ala lseek */
506 #define MATCHFLG_WILD (1<<0) /* pattern has '*', '[', and/or '?' */
507 #define MATCHFLG_WILD2 (1<<1) /* pattern has '**' */
508 #define MATCHFLG_WILD2_PREFIX (1<<2) /* pattern starts with '**' */
509 #define MATCHFLG_ABS_PATH (1<<3) /* path-match on absolute path */
510 #define MATCHFLG_INCLUDE (1<<4) /* this is an include, not an exclude */
511 #define MATCHFLG_DIRECTORY (1<<5) /* this matches only directories */
512 #define MATCHFLG_CLEAR_LIST (1<<6) /* this item is the "!" token */
513 struct exclude_struct {
514 struct exclude_struct *next;
516 unsigned int match_flags;
520 struct exclude_list_struct {
521 struct exclude_struct *head;
522 struct exclude_struct *tail;
528 int64 total_transferred_size;
535 int num_transferred_files;
536 int current_file_index;
540 /* we need this function because of the silly way in which duplicate
541 entries are handled in the file lists - we can't change this
542 without breaking existing versions */
543 static inline int flist_up(struct file_list *flist, int i)
545 while (!flist->files[i]->basename) i++;
549 #include "byteorder.h"
550 #include "lib/mdfour.h"
551 #include "lib/wildmatch.h"
552 #include "lib/permstring.h"
553 #include "lib/addrinfo.h"
557 /* We have replacement versions of these if they're missing. */
558 #ifndef HAVE_ASPRINTF
559 int asprintf(char **ptr, const char *format, ...);
562 #ifndef HAVE_VASPRINTF
563 int vasprintf(char **ptr, const char *format, va_list ap);
566 #if !defined(HAVE_VSNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
567 #define vsnprintf rsync_vsnprintf
568 int vsnprintf(char *str, size_t count, const char *fmt, va_list args);
571 #if !defined(HAVE_SNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
572 #define snprintf rsync_snprintf
573 int snprintf(char *str,size_t count,const char *fmt,...);
578 extern char *sys_errlist[];
579 #define strerror(i) sys_errlist[i]
583 # define strchr index
584 # define strrchr rindex
587 #ifndef HAVE_ERRNO_DECL
591 #define SUPPORT_LINKS HAVE_READLINK
592 #define SUPPORT_HARD_LINKS HAVE_LINK
594 /* This could be bad on systems which have no lchown and where chown
595 * follows symbollic links. On such systems it might be better not to
596 * try to chown symlinks at all. */
601 #define SIGNAL_CAST (RETSIGTYPE (*)())
604 #define EWOULDBLOCK EAGAIN
608 #define STDIN_FILENO 0
611 #ifndef STDOUT_FILENO
612 #define STDOUT_FILENO 1
615 #ifndef STDERR_FILENO
616 #define STDERR_FILENO 2
628 #define ACCESSPERMS 0777
635 #define CHMOD_BITS (S_ISUID | S_ISGID | S_ISVTX | ACCESSPERMS)
638 #define _S_IFMT 0170000
642 #define _S_IFLNK 0120000
646 #define S_ISLNK(mode) (((mode) & (_S_IFMT)) == (_S_IFLNK))
650 #define S_ISBLK(mode) (((mode) & (_S_IFMT)) == (_S_IFBLK))
654 #define S_ISCHR(mode) (((mode) & (_S_IFMT)) == (_S_IFCHR))
659 #define S_ISSOCK(mode) (((mode) & (_S_IFMT)) == (_S_IFSOCK))
661 #define S_ISSOCK(mode) (0)
667 #define S_ISFIFO(mode) (((mode) & (_S_IFMT)) == (_S_IFIFO))
669 #define S_ISFIFO(mode) (0)
674 #define S_ISDIR(mode) (((mode) & (_S_IFMT)) == (_S_IFDIR))
678 #define S_ISREG(mode) (((mode) & (_S_IFMT)) == (_S_IFREG))
681 /* work out what fcntl flag to use for non-blocking */
683 # define NONBLOCK_FLAG O_NONBLOCK
685 # define NONBLOCK_FLAG O_NDELAY
687 # define NONBLOCK_FLAG FNDELAY
690 #ifndef INADDR_LOOPBACK
691 #define INADDR_LOOPBACK 0x7f000001
695 #define INADDR_NONE 0xffffffff
698 #define IS_DEVICE(mode) (S_ISCHR(mode) || S_ISBLK(mode) || S_ISSOCK(mode) || S_ISFIFO(mode))
700 /* Initial mask on permissions given to temporary files. Mask off setuid
701 bits and group access because of potential race-condition security
702 holes, and mask other access because mode 707 is bizarre */
703 #define INITACCESSPERMS 0700
705 /* handler for null strings in printf format */
706 #define NS(s) ((s)?(s):"<NULL>")
708 #if !defined(__GNUC__) || defined(APPLE)
709 /* Apparently the OS X port of gcc gags on __attribute__.
711 * <http://www.opensource.apple.com/bugs/X/gcc/2512150.html> */
712 #define __attribute__(x)
716 /* Convenient wrappers for malloc and realloc. Use them. */
717 #define new(type) ((type *)malloc(sizeof(type)))
718 #define new_array(type, num) ((type *)_new_array(sizeof(type), (num)))
719 #define realloc_array(ptr, type, num) ((type *)_realloc_array((ptr), sizeof(type), (num)))
721 /* use magic gcc attributes to catch format errors */
722 void rprintf(enum logcode , const char *, ...)
723 __attribute__((format (printf, 2, 3)))
726 /* This is just like rprintf, but it also tries to print some
727 * representation of the error code. Normally errcode = errno. */
728 void rsyserr(enum logcode, int, const char *, ...)
729 __attribute__((format (printf, 3, 4)))
732 #ifdef REPLACE_INET_NTOA
733 #define inet_ntoa rep_inet_ntoa
736 /* Make sure that the O_BINARY flag is defined. */
742 size_t strlcpy(char *d, const char *s, size_t bufsize);
746 size_t strlcat(char *d, const char *s, size_t bufsize);
750 #define WEXITSTATUS(stat) ((int)(((stat)>>8)&0xFF))
753 #define exit_cleanup(code) _exit_cleanup(code, __FILE__, __LINE__)
756 #define MY_UID() geteuid()
758 #define MY_UID() getuid()
762 #define MY_GID() getegid()
764 #define MY_GID() getgid()
769 #ifndef HAVE_INET_NTOP
771 inet_ntop(int af, const void *src, char *dst, size_t size);
772 #endif /* !HAVE_INET_NTOP */
774 #ifndef HAVE_INET_PTON
775 int inet_pton(int af, const char *src, void *dst);
778 #ifdef MAINTAINER_MODE
779 const char *get_panic_action(void);
782 #define UNUSED(x) x __attribute__((__unused__))
784 extern const char *io_write_phase, *io_read_phase;