Files
android_external_rsync/rsync.h
2003-12-16 23:04:59 +00:00

689 lines
15 KiB
C

/*
Copyright (C) by Andrew Tridgell 1996, 2000
Copyright (C) Paul Mackerras 1996
Copyright (C) 2001, 2002 by Martin Pool <mbp@samba.org>
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
#define FLAG_DELETE (1<<0)
#define SAME_MODE (1<<1)
#define SAME_RDEV (1<<2)
#define SAME_UID (1<<3)
#define SAME_GID (1<<4)
#define SAME_DIR (1<<5)
#define SAME_NAME SAME_DIR
#define LONG_NAME (1<<6)
#define SAME_TIME (1<<7)
/* update this if you make incompatible changes */
#define PROTOCOL_VERSION 27
/* 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 17
#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
/* Log values. I *think* what these mean is: FLOG goes to the server
* logfile; FERROR and FINFO try to end up on the client, with
* different levels of filtering. */
enum logcode {FNONE=0, FERROR=1, FINFO=2, FLOG=3 };
#include "errcode.h"
#include "config.h"
/* The default RSYNC_RSH is always set in config.h. */
#include <sys/types.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <stdio.h>
#include <stddef.h>
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#if defined(HAVE_MALLOC_H) && (defined(HAVE_MALLINFO) || !defined(HAVE_STDLIB_H))
#include <malloc.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef TIME_WITH_SYS_TIME
#include <sys/time.h>
#include <time.h>
#else
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#else
#include <time.h>
#endif
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#else
#ifdef HAVE_SYS_FCNTL_H
#include <sys/fcntl.h>
#endif
#endif
#include <sys/stat.h>
#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif
#ifdef HAVE_SYS_FILIO_H
#include <sys/filio.h>
#endif
#include <signal.h>
#ifdef HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
#ifdef HAVE_CTYPE_H
#include <ctype.h>
#endif
#ifdef HAVE_GRP_H
#include <grp.h>
#endif
#include <errno.h>
#ifdef HAVE_UTIME_H
#include <utime.h>
#endif
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#ifdef HAVE_SYS_MODE_H
/* apparently AIX needs this for S_ISLNK */
#ifndef S_ISLNK
#include <sys/mode.h>
#endif
#endif
#ifdef HAVE_GLOB_H
#include <glob.h>
#endif
/* these are needed for the uid/gid mapping code */
#include <pwd.h>
#include <grp.h>
#include <stdarg.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <syslog.h>
#include <sys/file.h>
#if HAVE_DIRENT_H
# include <dirent.h>
#else
# define dirent direct
# if HAVE_SYS_NDIR_H
# include <sys/ndir.h>
# endif
# if HAVE_SYS_DIR_H
# include <sys/dir.h>
# endif
# if HAVE_NDIR_H
# include <ndir.h>
# endif
#endif
#ifdef HAVE_COMPAT_H
#include <compat.h>
#endif
#include <assert.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
struct file_struct {
unsigned flags;
time_t modtime;
OFF_T length;
mode_t mode;
INO64_T inode;
/** Device this file lives upon */
DEV64_T dev;
/** If this is a device node, the device number. */
DEV64_T rdev;
uid_t uid;
gid_t gid;
char *basename;
char *dirname;
char *basedir;
char *link;
char *sum;
};
#define ARENA_SIZE (32 * 1024)
struct string_area {
char *base;
char *end;
char *current;
struct string_area *next;
};
struct file_list {
int count;
int malloced;
struct file_struct **files;
struct string_area *string_area;
};
struct sum_buf {
OFF_T offset; /**< offset in file of this chunk */
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 */
size_t remainder; /**< flength % block_length */
size_t blength; /**< block_length */
size_t 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;
};
/* 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):"<NULL>")
#if !defined(__GNUC__) || defined(APPLE)
/* Apparently the OS X port of gcc gags on __attribute__.
*
* <http://www.opensource.apple.com/bugs/X/gcc/2512150.html> */
#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__)
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;