/* Copyright (C) by Andrew Tridgell 1996, 2000 Copyright (C) Paul Mackerras 1996 Copyright (C) 2001, 2002 by Martin Pool This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #define False 0 #define True 1 #define BLOCK_SIZE 700 #define RSYNC_RSH_ENV "RSYNC_RSH" #define RSYNC_RSH_IO_ENV "RSYNC_RSH_IO" #define RSYNC_NAME "rsync" #define RSYNCD_SYSCONF "/etc/rsyncd.conf" #define RSYNCD_USERCONF "rsyncd.conf" #define DEFAULT_LOCK_FILE "/var/run/rsyncd.lock" #define URL_PREFIX "rsync://" #define BACKUP_SUFFIX "~" /* a non-zero CHAR_OFFSET makes the rolling sum stronger, but is incompatible with older versions :-( */ #define CHAR_OFFSET 0 /* These flags are only used during the flist transfer. */ #define XMIT_TOP_DIR (1<<0) #define XMIT_SAME_MODE (1<<1) #define XMIT_EXTENDED_FLAGS (1<<2) #define XMIT_SAME_RDEV_pre28 XMIT_EXTENDED_FLAGS /* Only in protocols < 28 */ #define XMIT_SAME_UID (1<<3) #define XMIT_SAME_GID (1<<4) #define XMIT_SAME_NAME (1<<5) #define XMIT_LONG_NAME (1<<6) #define XMIT_SAME_TIME (1<<7) #define XMIT_SAME_HIGH_RDEV (1<<8) #define XMIT_HAS_IDEV_DATA (1<<9) #define XMIT_SAME_DEV (1<<10) /* These flags are used in the live flist data. */ #define FLAG_TOP_DIR (1<<0) #define FLAG_HLINK_EOL (1<<1) /* generator only */ #define FLAG_MOUNT_POINT (1<<2) /* sender only */ /* update this if you make incompatible changes */ #define PROTOCOL_VERSION 28 /* We refuse to interoperate with versions that are not in this range. * Note that we assume we'll work with later versions: the onus is on * people writing them to make sure that they don't send us anything * we won't understand. * * Interoperation with old but supported protocol versions * should cause a warning to be printed. At a future date * the old protocol will become the minimum and * compatibility code removed. * * There are two possible explanations for the limit at * MAX_PROTOCOL_VERSION: either to allow new major-rev versions that * do not interoperate with us, and (more likely) so that we can * detect an attempt to connect rsync to a non-rsync server, which is * unlikely to begin by sending a byte between MIN_PROTOCL_VERSION and * MAX_PROTOCOL_VERSION. */ #define MIN_PROTOCOL_VERSION 19 #define OLD_PROTOCOL_VERSION 20 #define MAX_PROTOCOL_VERSION 40 #define RSYNC_PORT 873 #define SPARSE_WRITE_SIZE (1024) #define WRITE_SIZE (32*1024) #define CHUNK_SIZE (32*1024) #define MAX_MAP_SIZE (256*1024) #define IO_BUFFER_SIZE (4092) #define IOERR_GENERAL (1<<0) /* For backward compatibility, this must == 1 */ #define IOERR_VANISHED (1<<1) #define MAX_ARGS 1000 #define MPLEX_BASE 7 #define NO_EXCLUDES 0 #define SERVER_EXCLUDES 1 #define ALL_EXCLUDES 2 #define MISSING_OK 0 #define MISSING_FATAL 1 #define ADD_INCLUDE 1 #define ADD_EXCLUDE 0 #define FULL_FLUSH 1 #define NORMAL_FLUSH 0 /* Log-message categories. FLOG is only used on the daemon side to * output messages to the log file. */ enum logcode { FERROR=1, FINFO=2, FLOG=3 }; /* Messages types that are sent over the message channel. The logcode * values must all be present here with identical numbers. */ enum msgcode { MSG_DATA=0, /* raw data on the multiplexed stream */ MSG_ERROR=FERROR, MSG_INFO=FINFO, MSG_LOG=FLOG, /* remote logging */ MSG_REDO=4, /* reprocess indicated flist index */ MSG_DONE=5, /* current phase is done */ }; #include "errcode.h" #include "config.h" /* The default RSYNC_RSH is always set in config.h. */ #include #ifdef HAVE_UNISTD_H #include #endif #include #include #ifdef HAVE_SYS_PARAM_H #include #endif #ifdef HAVE_STDLIB_H #include #endif #if defined(HAVE_MALLOC_H) && (defined(HAVE_MALLINFO) || !defined(HAVE_STDLIB_H)) #include #endif #ifdef HAVE_SYS_SOCKET_H #include #endif #ifdef HAVE_STRING_H #include #endif #ifdef TIME_WITH_SYS_TIME #include #include #else #ifdef HAVE_SYS_TIME_H #include #else #include #endif #endif #ifdef HAVE_FCNTL_H #include #else #ifdef HAVE_SYS_FCNTL_H #include #endif #endif #include #ifdef HAVE_SYS_IOCTL_H #include #endif #ifdef HAVE_SYS_FILIO_H #include #endif #include #ifdef HAVE_SYS_WAIT_H #include #endif #ifdef HAVE_CTYPE_H #include #endif #ifdef HAVE_GRP_H #include #endif #include #ifdef HAVE_UTIME_H #include #endif #ifdef HAVE_SYS_SELECT_H #include #endif #ifdef HAVE_SYS_MODE_H /* apparently AIX needs this for S_ISLNK */ #ifndef S_ISLNK #include #endif #endif #ifdef HAVE_GLOB_H #include #endif /* these are needed for the uid/gid mapping code */ #include #include #include #include #include #include #include #include #if HAVE_DIRENT_H # include #else # define dirent direct # if HAVE_SYS_NDIR_H # include # endif # if HAVE_SYS_DIR_H # include # endif # if HAVE_NDIR_H # include # endif #endif #ifdef HAVE_COMPAT_H #include #endif #include #include "lib/pool_alloc.h" #define BOOL int #ifndef uchar #define uchar unsigned char #endif #if HAVE_UNSIGNED_CHAR #define schar signed char #else #define schar char #endif #ifndef int32 #if (SIZEOF_INT == 4) #define int32 int #elif (SIZEOF_LONG == 4) #define int32 long #elif (SIZEOF_SHORT == 4) #define int32 short #else /* I hope this works */ #define int32 int #define LARGE_INT32 #endif #endif #ifndef uint32 #define uint32 unsigned int32 #endif #if HAVE_OFF64_T #define OFF_T off64_t #define STRUCT_STAT struct stat64 #else #define OFF_T off_t #define STRUCT_STAT struct stat #endif #if HAVE_OFF64_T #define int64 off64_t #elif (SIZEOF_LONG == 8) #define int64 long #elif (SIZEOF_INT == 8) #define int64 int #elif HAVE_LONGLONG #define int64 long long #else /* As long as it gets... */ #define int64 off_t #define NO_INT64 #endif #if (SIZEOF_LONG == 8) #define uint64 unsigned long #elif (SIZEOF_INT == 8) #define uint64 unsigned int #elif HAVE_LONGLONG #define uint64 unsigned long long #else /* As long as it gets... */ #define uint64 unsigned off_t #endif /* Starting from protocol version 26, we always use 64-bit * ino_t and dev_t internally, even if this platform does not * allow files to have 64-bit inums. That's because the * receiver needs to find duplicate (dev,ino) tuples to detect * hardlinks, and it might have files coming from a platform * that has 64-bit inums. * * The only exception is if we're on a platform with no 64-bit type at * all. * * Because we use read_longint() to get these off the wire, if you * transfer devices or hardlinks with dev or inum > 2**32 to a machine * with no 64-bit types then you will get an overflow error. Probably * not many people have that combination of machines, and you can * avoid it by not preserving hardlinks or not transferring device * nodes. It's not clear that any other behaviour is better. * * Note that if you transfer devices from a 64-bit-devt machine (say, * Solaris) to a 32-bit-devt machine (say, Linux-2.2/x86) then the * device numbers will be truncated. But it's a kind of silly thing * to do anyhow. * * FIXME: In future, we should probable split the device number into * major/minor, and transfer the two parts as 32-bit ints. That gives * you somewhat more of a chance that they'll come from a big machine * to a little one in a useful way. * * FIXME: Really we need an unsigned type, and we perhaps ought to * cope with platforms on which this is an unsigned int or even a * struct. Later. */ #define INO64_T uint64 #define DEV64_T uint64 #ifndef MIN #define MIN(a,b) ((a)<(b)?(a):(b)) #endif #ifndef MAX #define MAX(a,b) ((a)>(b)?(a):(b)) #endif #ifndef MAXHOSTNAMELEN #define MAXHOSTNAMELEN 256 #endif /* the length of the md4 checksum */ #define MD4_SUM_LENGTH 16 #define SUM_LENGTH 16 #define SHORT_SUM_LENGTH 2 #define BLOCKSUM_BIAS 10 #ifndef MAXPATHLEN #define MAXPATHLEN 1024 #endif #ifndef NAME_MAX #define NAME_MAX 255 #endif #ifndef INADDR_NONE #define INADDR_NONE 0xffffffff #endif #ifndef IN_LOOPBACKNET #define IN_LOOPBACKNET 127 #endif #define GID_NONE (gid_t) -1 #define HL_CHECK_MASTER 0 #define HL_SKIP 1 struct hlink { int hlindex; struct file_struct *next; }; struct idev { INO64_T inode; DEV64_T dev; }; #define F_DEV link_u.idev->dev #define F_INODE link_u.idev->inode #define F_HLINDEX link_u.links->hlindex #define F_NEXT link_u.links->next struct file_struct { time_t modtime; OFF_T length; mode_t mode; union { DEV64_T rdev; /* The device number, if this is a device */ char *sum; /* Only a normal file can have a checksum */ char *link; /* Holds symlink string, if a symlink */ } u; union { struct idev *idev; struct hlink *links; } link_u; char *basename; char *dirname; char *basedir; uid_t uid; gid_t gid; uchar flags; /* this item MUST remain last */ }; /* * Start the flist array at FLIST_START entries and grow it * by doubling until FLIST_LINEAR then grow by FLIST_LINEAR */ #define FLIST_START (32 * 1024) #define FLIST_LINEAR (FLIST_START * 512) /* * Extent size for allocation pools A minimum size of 128KB * is needed to mmap them so that freeing will release the * space to the OS. * * Larger sizes reduce leftover fragments and speed free calls * (when they happen) Smaller sizes increase the chance of * freed allocations freeing whole extents. */ #define FILE_EXTENT (256 * 1024) #define HLINK_EXTENT (128 * 1024) #define WITH_HLINK 1 #define WITHOUT_HLINK 0 struct file_list { int count; int malloced; alloc_pool_t file_pool; alloc_pool_t hlink_pool; struct file_struct **files; }; struct sum_buf { OFF_T offset; /**< offset in file of this chunk */ unsigned int len; /**< length of chunk of file */ int i; /**< index of this chunk */ uint32 sum1; /**< simple checksum */ char sum2[SUM_LENGTH]; /**< checksum */ }; struct sum_struct { OFF_T flength; /**< total file length */ size_t count; /**< how many chunks */ unsigned int blength; /**< block_length */ unsigned int remainder; /**< flength % block_length */ int s2length; /**< sum2_length */ struct sum_buf *sums; /**< points to info for each chunk */ }; struct map_struct { char *p; /* Window pointer */ int fd; /* File Descriptor */ int p_size; /* Window size at allocation */ int p_len; /* Window size after fill */ /* p_size and p_len could be * consolodated by using a local * variable in map_ptr() */ int status; /* first errno from read errors */ OFF_T file_size; /* File size (from stat) */ OFF_T p_offset; /* Window start */ OFF_T p_fd_offset; /* offset of cursor in fd ala lseek */ }; #define MATCHFLG_WILD (1<<0) /* pattern has '*', '[', and/or '?' */ #define MATCHFLG_WILD2 (1<<1) /* pattern has '**' */ #define MATCHFLG_WILD2_PREFIX (1<<2) /* pattern starts with '**' */ #define MATCHFLG_ABS_PATH (1<<3) /* path-match on absolute path */ struct exclude_struct { char *pattern; int match_flags; int include; int directory; int slash_cnt; }; struct stats { int64 total_size; int64 total_transferred_size; int64 total_written; int64 total_read; int64 literal_data; int64 matched_data; int flist_size; int num_files; int num_transferred_files; int current_file_index; }; /* we need this function because of the silly way in which duplicate entries are handled in the file lists - we can't change this without breaking existing versions */ static inline int flist_up(struct file_list *flist, int i) { while (!flist->files[i]->basename) i++; return i; } #include "byteorder.h" #include "lib/mdfour.h" #include "lib/wildmatch.h" #include "lib/permstring.h" #include "lib/addrinfo.h" #include "proto.h" /* We have replacement versions of these if they're missing. */ #ifndef HAVE_ASPRINTF int asprintf(char **ptr, const char *format, ...); #endif #ifndef HAVE_VASPRINTF int vasprintf(char **ptr, const char *format, va_list ap); #endif #if !defined(HAVE_VSNPRINTF) || !defined(HAVE_C99_VSNPRINTF) #define vsnprintf rsync_vsnprintf int vsnprintf(char *str, size_t count, const char *fmt, va_list args); #endif #if !defined(HAVE_SNPRINTF) || !defined(HAVE_C99_VSNPRINTF) #define snprintf rsync_snprintf int snprintf(char *str,size_t count,const char *fmt,...); #endif #if !HAVE_STRERROR extern char *sys_errlist[]; #define strerror(i) sys_errlist[i] #endif #ifndef HAVE_STRCHR # define strchr index # define strrchr rindex #endif #ifndef HAVE_ERRNO_DECL extern int errno; #endif #define SUPPORT_LINKS HAVE_READLINK #define SUPPORT_HARD_LINKS HAVE_LINK /* This could be bad on systems which have no lchown and where chown * follows symbollic links. On such systems it might be better not to * try to chown symlinks at all. */ #ifndef HAVE_LCHOWN #define lchown chown #endif #define SIGNAL_CAST (RETSIGTYPE (*)()) #ifndef EWOULDBLOCK #define EWOULDBLOCK EAGAIN #endif #ifndef STDIN_FILENO #define STDIN_FILENO 0 #endif #ifndef STDOUT_FILENO #define STDOUT_FILENO 1 #endif #ifndef STDERR_FILENO #define STDERR_FILENO 2 #endif #ifndef S_IWUSR #define S_IWUSR 0200 #endif #ifndef ACCESSPERMS #define ACCESSPERMS 0777 #endif #ifndef S_ISVTX #define S_ISVTX 0 #endif #define CHMOD_BITS (S_ISUID | S_ISGID | S_ISVTX | ACCESSPERMS) #ifndef _S_IFMT #define _S_IFMT 0170000 #endif #ifndef _S_IFLNK #define _S_IFLNK 0120000 #endif #ifndef S_ISLNK #define S_ISLNK(mode) (((mode) & (_S_IFMT)) == (_S_IFLNK)) #endif #ifndef S_ISBLK #define S_ISBLK(mode) (((mode) & (_S_IFMT)) == (_S_IFBLK)) #endif #ifndef S_ISCHR #define S_ISCHR(mode) (((mode) & (_S_IFMT)) == (_S_IFCHR)) #endif #ifndef S_ISSOCK #ifdef _S_IFSOCK #define S_ISSOCK(mode) (((mode) & (_S_IFMT)) == (_S_IFSOCK)) #else #define S_ISSOCK(mode) (0) #endif #endif #ifndef S_ISFIFO #ifdef _S_IFIFO #define S_ISFIFO(mode) (((mode) & (_S_IFMT)) == (_S_IFIFO)) #else #define S_ISFIFO(mode) (0) #endif #endif #ifndef S_ISDIR #define S_ISDIR(mode) (((mode) & (_S_IFMT)) == (_S_IFDIR)) #endif #ifndef S_ISREG #define S_ISREG(mode) (((mode) & (_S_IFMT)) == (_S_IFREG)) #endif /* work out what fcntl flag to use for non-blocking */ #ifdef O_NONBLOCK # define NONBLOCK_FLAG O_NONBLOCK #elif defined(SYSV) # define NONBLOCK_FLAG O_NDELAY #else # define NONBLOCK_FLAG FNDELAY #endif #ifndef INADDR_LOOPBACK #define INADDR_LOOPBACK 0x7f000001 #endif #ifndef INADDR_NONE #define INADDR_NONE 0xffffffff #endif #define IS_DEVICE(mode) (S_ISCHR(mode) || S_ISBLK(mode) || S_ISSOCK(mode) || S_ISFIFO(mode)) /* Initial mask on permissions given to temporary files. Mask off setuid bits and group access because of potential race-condition security holes, and mask other access because mode 707 is bizarre */ #define INITACCESSPERMS 0700 /* handler for null strings in printf format */ #define NS(s) ((s)?(s):"") #if !defined(__GNUC__) || defined(APPLE) /* Apparently the OS X port of gcc gags on __attribute__. * * */ #define __attribute__(x) #endif /* Convenient wrappers for malloc and realloc. Use them. */ #define new(type) ((type *)malloc(sizeof(type))) #define new_array(type, num) ((type *)_new_array(sizeof(type), (num))) #define realloc_array(ptr, type, num) ((type *)_realloc_array((ptr), sizeof(type), (num))) /* use magic gcc attributes to catch format errors */ void rprintf(enum logcode , const char *, ...) __attribute__((format (printf, 2, 3))) ; /* This is just like rprintf, but it also tries to print some * representation of the error code. Normally errcode = errno. */ void rsyserr(enum logcode, int, const char *, ...) __attribute__((format (printf, 3, 4))) ; #ifdef REPLACE_INET_NTOA #define inet_ntoa rep_inet_ntoa #endif /* Make sure that the O_BINARY flag is defined. */ #ifndef O_BINARY #define O_BINARY 0 #endif #ifndef HAVE_STRLCPY size_t strlcpy(char *d, const char *s, size_t bufsize); #endif #ifndef HAVE_STRLCAT size_t strlcat(char *d, const char *s, size_t bufsize); #endif #ifndef WEXITSTATUS #define WEXITSTATUS(stat) ((int)(((stat)>>8)&0xFF)) #endif #define exit_cleanup(code) _exit_cleanup(code, __FILE__, __LINE__) #ifdef HAVE_GETEUID #define MY_UID() geteuid() #else #define MY_UID() getuid() #endif #ifdef HAVE_GETEGID #define MY_GID() getegid() #else #define MY_GID() getgid() #endif extern int verbose; #ifndef HAVE_INET_NTOP const char * inet_ntop(int af, const void *src, char *dst, size_t size); #endif /* !HAVE_INET_NTOP */ #ifndef HAVE_INET_PTON int inet_pton(int af, const char *src, void *dst); #endif #ifdef MAINTAINER_MODE const char *get_panic_action(void); #endif #define UNUSED(x) x __attribute__((__unused__)) extern const char *io_write_phase, *io_read_phase;