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 SAME_RDEV (1<<2)
46 #define SAME_UID (1<<3)
47 #define SAME_GID (1<<4)
48 #define SAME_DIR (1<<5)
49 #define SAME_NAME SAME_DIR
50 #define LONG_NAME (1<<6)
51 #define SAME_TIME (1<<7)
53 /* update this if you make incompatible changes */
54 #define PROTOCOL_VERSION 27
56 /* We refuse to interoperate with versions that are not in this range.
57 * Note that we assume we'll work with later versions: the onus is on
58 * people writing them to make sure that they don't send us anything
59 * we won't understand.
61 * Interoperation with old but supported protocol versions
62 * should cause a warning to be printed. At a future date
63 * the old protocol will become the minimum and
64 * compatibility code removed.
66 * There are two possible explanations for the limit at
67 * MAX_PROTOCOL_VERSION: either to allow new major-rev versions that
68 * do not interoperate with us, and (more likely) so that we can
69 * detect an attempt to connect rsync to a non-rsync server, which is
70 * unlikely to begin by sending a byte between MIN_PROTOCL_VERSION and
71 * MAX_PROTOCOL_VERSION. */
73 #define MIN_PROTOCOL_VERSION 19
74 #define OLD_PROTOCOL_VERSION 20
75 #define MAX_PROTOCOL_VERSION 40
77 #define RSYNC_PORT 873
79 #define SPARSE_WRITE_SIZE (1024)
80 #define WRITE_SIZE (32*1024)
81 #define CHUNK_SIZE (32*1024)
82 #define MAX_MAP_SIZE (256*1024)
83 #define IO_BUFFER_SIZE (4092)
85 #define IOERR_GENERAL (1<<0) /* For backward compatibility, this must == 1 */
86 #define IOERR_VANISHED (1<<1)
93 #define SERVER_EXCLUDES 1
94 #define ALL_EXCLUDES 2
97 #define MISSING_FATAL 1
100 #define ADD_EXCLUDE 0
102 /* Log values. I *think* what these mean is: FLOG goes to the server
103 * logfile; FERROR and FINFO try to end up on the client, with
104 * different levels of filtering. */
105 enum logcode {FNONE=0, FERROR=1, FINFO=2, FLOG=3 };
111 /* The default RSYNC_RSH is always set in config.h. */
113 #include <sys/types.h>
121 #ifdef HAVE_SYS_PARAM_H
122 #include <sys/param.h>
129 #if defined(HAVE_MALLOC_H) && (defined(HAVE_MALLINFO) || !defined(HAVE_STDLIB_H))
133 #ifdef HAVE_SYS_SOCKET_H
134 #include <sys/socket.h>
141 #ifdef TIME_WITH_SYS_TIME
142 #include <sys/time.h>
145 #ifdef HAVE_SYS_TIME_H
146 #include <sys/time.h>
155 #ifdef HAVE_SYS_FCNTL_H
156 #include <sys/fcntl.h>
160 #include <sys/stat.h>
162 #ifdef HAVE_SYS_IOCTL_H
163 #include <sys/ioctl.h>
166 #ifdef HAVE_SYS_FILIO_H
167 #include <sys/filio.h>
171 #ifdef HAVE_SYS_WAIT_H
172 #include <sys/wait.h>
186 #ifdef HAVE_SYS_SELECT_H
187 #include <sys/select.h>
190 #ifdef HAVE_SYS_MODE_H
191 /* apparently AIX needs this for S_ISLNK */
193 #include <sys/mode.h>
201 /* these are needed for the uid/gid mapping code */
206 #include <netinet/in.h>
207 #include <arpa/inet.h>
210 #include <sys/file.h>
215 # define dirent direct
217 # include <sys/ndir.h>
220 # include <sys/dir.h>
237 #define uchar unsigned char
240 #if HAVE_UNSIGNED_CHAR
241 #define schar signed char
247 #if (SIZEOF_INT == 4)
249 #elif (SIZEOF_LONG == 4)
251 #elif (SIZEOF_SHORT == 4)
254 /* I hope this works */
261 #define uint32 unsigned int32
265 #define OFF_T off64_t
266 #define STRUCT_STAT struct stat64
269 #define STRUCT_STAT struct stat
273 #define int64 off64_t
274 #elif (SIZEOF_LONG == 8)
276 #elif (SIZEOF_INT == 8)
279 #define int64 long long
281 /* As long as it gets... */
286 #if (SIZEOF_LONG == 8)
287 #define uint64 unsigned long
288 #elif (SIZEOF_INT == 8)
289 #define uint64 unsigned int
291 #define uint64 unsigned long long
293 /* As long as it gets... */
294 #define uint64 unsigned off_t
297 /* Starting from protocol version 26, we always use 64-bit
298 * ino_t and dev_t internally, even if this platform does not
299 * allow files to have 64-bit inums. That's because the
300 * receiver needs to find duplicate (dev,ino) tuples to detect
301 * hardlinks, and it might have files coming from a platform
302 * that has 64-bit inums.
304 * The only exception is if we're on a platform with no 64-bit type at
307 * Because we use read_longint() to get these off the wire, if you
308 * transfer devices or hardlinks with dev or inum > 2**32 to a machine
309 * with no 64-bit types then you will get an overflow error. Probably
310 * not many people have that combination of machines, and you can
311 * avoid it by not preserving hardlinks or not transferring device
312 * nodes. It's not clear that any other behaviour is better.
314 * Note that if you transfer devices from a 64-bit-devt machine (say,
315 * Solaris) to a 32-bit-devt machine (say, Linux-2.2/x86) then the
316 * device numbers will be truncated. But it's a kind of silly thing
319 * FIXME: In future, we should probable split the device number into
320 * major/minor, and transfer the two parts as 32-bit ints. That gives
321 * you somewhat more of a chance that they'll come from a big machine
322 * to a little one in a useful way.
324 * FIXME: Really we need an unsigned type, and we perhaps ought to
325 * cope with platforms on which this is an unsigned int or even a
328 #define INO64_T uint64
329 #define DEV64_T uint64
332 #define MIN(a,b) ((a)<(b)?(a):(b))
336 #define MAX(a,b) ((a)>(b)?(a):(b))
339 #ifndef MAXHOSTNAMELEN
340 #define MAXHOSTNAMELEN 256
343 /* the length of the md4 checksum */
344 #define MD4_SUM_LENGTH 16
345 #define SUM_LENGTH 16
346 #define SHORT_SUM_LENGTH 2
347 #define BLOCKSUM_BIAS 10
350 #define MAXPATHLEN 1024
358 #define INADDR_NONE 0xffffffff
361 #ifndef IN_LOOPBACKNET
362 #define IN_LOOPBACKNET 127
365 #define GID_NONE (gid_t) -1
374 /** Device this file lives upon */
377 /** If this is a device node, the device number. */
389 #define ARENA_SIZE (32 * 1024)
395 struct string_area *next;
401 struct file_struct **files;
402 struct string_area *string_area;
406 OFF_T offset; /**< offset in file of this chunk */
407 unsigned int len; /**< length of chunk of file */
408 int i; /**< index of this chunk */
409 uint32 sum1; /**< simple checksum */
410 char sum2[SUM_LENGTH]; /**< checksum */
414 OFF_T flength; /**< total file length */
415 size_t count; /**< how many chunks */
416 unsigned int blength; /**< block_length */
417 unsigned int remainder; /**< flength % block_length */
418 int s2length; /**< sum2_length */
419 struct sum_buf *sums; /**< points to info for each chunk */
423 char *p; /* Window pointer */
424 int fd; /* File Descriptor */
425 int p_size; /* Window size at allocation */
426 int p_len; /* Window size after fill */
427 /* p_size and p_len could be
428 * consolodated by using a local
429 * variable in map_ptr() */
430 int status; /* first errno from read errors */
431 OFF_T file_size; /* File size (from stat) */
432 OFF_T p_offset; /* Window start */
433 OFF_T p_fd_offset; /* offset of cursor in fd ala lseek */
436 #define MATCHFLG_WILD (1<<0) /* pattern has '*', '[', and/or '?' */
437 #define MATCHFLG_WILD2 (1<<1) /* pattern has '**' */
438 #define MATCHFLG_WILD2_PREFIX (1<<2) /* pattern starts with '**' */
439 #define MATCHFLG_ABS_PATH (1<<3) /* path-match on absolute path */
440 struct exclude_struct {
450 int64 total_transferred_size;
457 int num_transferred_files;
461 /* we need this function because of the silly way in which duplicate
462 entries are handled in the file lists - we can't change this
463 without breaking existing versions */
464 static inline int flist_up(struct file_list *flist, int i)
466 while (!flist->files[i]->basename) i++;
470 #include "byteorder.h"
471 #include "lib/mdfour.h"
472 #include "lib/wildmatch.h"
473 #include "lib/permstring.h"
474 #include "lib/addrinfo.h"
478 /* We have replacement versions of these if they're missing. */
479 #ifndef HAVE_ASPRINTF
480 int asprintf(char **ptr, const char *format, ...);
483 #ifndef HAVE_VASPRINTF
484 int vasprintf(char **ptr, const char *format, va_list ap);
487 #if !defined(HAVE_VSNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
488 #define vsnprintf rsync_vsnprintf
489 int vsnprintf(char *str, size_t count, const char *fmt, va_list args);
492 #if !defined(HAVE_SNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
493 #define snprintf rsync_snprintf
494 int snprintf(char *str,size_t count,const char *fmt,...);
499 extern char *sys_errlist[];
500 #define strerror(i) sys_errlist[i]
504 # define strchr index
505 # define strrchr rindex
508 #ifndef HAVE_ERRNO_DECL
512 #define SUPPORT_LINKS HAVE_READLINK
513 #define SUPPORT_HARD_LINKS HAVE_LINK
515 /* This could be bad on systems which have no lchown and where chown
516 * follows symbollic links. On such systems it might be better not to
517 * try to chown symlinks at all. */
522 #define SIGNAL_CAST (RETSIGTYPE (*)())
525 #define EWOULDBLOCK EAGAIN
529 #define STDIN_FILENO 0
532 #ifndef STDOUT_FILENO
533 #define STDOUT_FILENO 1
536 #ifndef STDERR_FILENO
537 #define STDERR_FILENO 2
545 #define ACCESSPERMS 0777
552 #define CHMOD_BITS (S_ISUID | S_ISGID | S_ISVTX | ACCESSPERMS)
555 #define _S_IFMT 0170000
559 #define _S_IFLNK 0120000
563 #define S_ISLNK(mode) (((mode) & (_S_IFMT)) == (_S_IFLNK))
567 #define S_ISBLK(mode) (((mode) & (_S_IFMT)) == (_S_IFBLK))
571 #define S_ISCHR(mode) (((mode) & (_S_IFMT)) == (_S_IFCHR))
576 #define S_ISSOCK(mode) (((mode) & (_S_IFMT)) == (_S_IFSOCK))
578 #define S_ISSOCK(mode) (0)
584 #define S_ISFIFO(mode) (((mode) & (_S_IFMT)) == (_S_IFIFO))
586 #define S_ISFIFO(mode) (0)
591 #define S_ISDIR(mode) (((mode) & (_S_IFMT)) == (_S_IFDIR))
595 #define S_ISREG(mode) (((mode) & (_S_IFMT)) == (_S_IFREG))
598 /* work out what fcntl flag to use for non-blocking */
600 # define NONBLOCK_FLAG O_NONBLOCK
602 # define NONBLOCK_FLAG O_NDELAY
604 # define NONBLOCK_FLAG FNDELAY
607 #ifndef INADDR_LOOPBACK
608 #define INADDR_LOOPBACK 0x7f000001
612 #define INADDR_NONE 0xffffffff
615 #define IS_DEVICE(mode) (S_ISCHR(mode) || S_ISBLK(mode) || S_ISSOCK(mode) || S_ISFIFO(mode))
617 /* Initial mask on permissions given to temporary files. Mask off setuid
618 bits and group access because of potential race-condition security
619 holes, and mask other access because mode 707 is bizarre */
620 #define INITACCESSPERMS 0700
622 /* handler for null strings in printf format */
623 #define NS(s) ((s)?(s):"<NULL>")
625 #if !defined(__GNUC__) || defined(APPLE)
626 /* Apparently the OS X port of gcc gags on __attribute__.
628 * <http://www.opensource.apple.com/bugs/X/gcc/2512150.html> */
629 #define __attribute__(x)
633 /* Convenient wrappers for malloc and realloc. Use them. */
634 #define new(type) ((type *)malloc(sizeof(type)))
635 #define new_array(type, num) ((type *)_new_array(sizeof(type), (num)))
636 #define realloc_array(ptr, type, num) ((type *)_realloc_array((ptr), sizeof(type), (num)))
638 /* use magic gcc attributes to catch format errors */
639 void rprintf(enum logcode , const char *, ...)
640 __attribute__((format (printf, 2, 3)))
643 /* This is just like rprintf, but it also tries to print some
644 * representation of the error code. Normally errcode = errno. */
645 void rsyserr(enum logcode, int, const char *, ...)
646 __attribute__((format (printf, 3, 4)))
649 #ifdef REPLACE_INET_NTOA
650 #define inet_ntoa rep_inet_ntoa
653 /* Make sure that the O_BINARY flag is defined. */
659 size_t strlcpy(char *d, const char *s, size_t bufsize);
663 size_t strlcat(char *d, const char *s, size_t bufsize);
667 #define WEXITSTATUS(stat) ((int)(((stat)>>8)&0xFF))
670 #define exit_cleanup(code) _exit_cleanup(code, __FILE__, __LINE__)
675 #ifndef HAVE_INET_NTOP
677 inet_ntop(int af, const void *src, char *dst, size_t size);
678 #endif /* !HAVE_INET_NTOP */
680 #ifndef HAVE_INET_PTON
681 int inet_pton(int af, const char *src, void *dst);
684 #ifdef MAINTAINER_MODE
685 const char *get_panic_action(void);
688 #define UNUSED(x) x __attribute__((__unused__))
690 extern const char *io_write_phase, *io_read_phase;