mirror of
https://github.com/RsyncProject/rsync.git
synced 2026-01-30 09:42:04 -05:00
22b1933287
temporary files were being created with the same permissions as the original file. So if the file was setuid but not owned by the user doing the transfer then there was a window of opportunity for a malicious user to execute it with the wrong permissions while it was being transferred. Thanks to snabb@epipe.fi for pointing this out.
443 lines
7.8 KiB
C
443 lines
7.8 KiB
C
/*
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Copyright (C) Andrew Tridgell 1996
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Copyright (C) Paul Mackerras 1996
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#define BLOCK_SIZE 700
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#define RSYNC_RSH_ENV "RSYNC_RSH"
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#define RSYNC_NAME "rsync"
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#define RSYNCD_CONF "/etc/rsyncd.conf"
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#define BACKUP_SUFFIX "~"
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/* a non-zero CHAR_OFFSET makes the rolling sum stronger, but is
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imcompatible with older versions :-( */
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#define CHAR_OFFSET 0
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#define FLAG_DELETE (1<<0)
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#define SAME_MODE (1<<1)
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#define SAME_RDEV (1<<2)
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#define SAME_UID (1<<3)
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#define SAME_GID (1<<4)
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#define SAME_DIR (1<<5)
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#define SAME_NAME SAME_DIR
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#define LONG_NAME (1<<6)
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#define SAME_TIME (1<<7)
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/* update this if you make incompatible changes */
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#define PROTOCOL_VERSION 19
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#define MIN_PROTOCOL_VERSION 11
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#define MAX_PROTOCOL_VERSION 30
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#define RSYNC_PORT 873
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#define SPARSE_WRITE_SIZE (1024)
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#define WRITE_SIZE (32*1024)
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#define CHUNK_SIZE (32*1024)
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#define MAX_MAP_SIZE (1*1024*1024)
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#define IO_BUFFER_SIZE (4092)
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#define MAX_READ_BUFFER (1024*1024)
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#define MAX_ARGS 1000
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#define MPLEX_BASE 7
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#define FERROR 1
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#define FINFO 2
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#include "config.h"
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#if HAVE_REMSH
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#define RSYNC_RSH "remsh"
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#else
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#define RSYNC_RSH "rsh"
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#endif
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#include <sys/types.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <stdio.h>
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#include <stddef.h>
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#ifdef HAVE_SYS_PARAM_H
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#include <sys/param.h>
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#endif
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#ifdef HAVE_SYS_SOCKET_H
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#include <sys/socket.h>
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#ifdef HAVE_MALLOC_H
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#include <malloc.h>
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#endif
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#ifdef TIME_WITH_SYS_TIME
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#include <sys/time.h>
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#include <time.h>
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#else
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#ifdef HAVE_SYS_TIME_H
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#include <sys/time.h>
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#else
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#include <time.h>
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#endif
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#endif
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#ifdef HAVE_FCNTL_H
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#include <fcntl.h>
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#else
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#ifdef HAVE_SYS_FCNTL_H
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#include <sys/fcntl.h>
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#endif
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#endif
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#include <sys/stat.h>
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#ifdef HAVE_SYS_IOCTL_H
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#include <sys/ioctl.h>
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#endif
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#ifdef HAVE_SYS_FILIO_H
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#include <sys/filio.h>
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#endif
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#include <signal.h>
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#ifdef HAVE_SYS_WAIT_H
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#include <sys/wait.h>
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#endif
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#ifdef HAVE_CTYPE_H
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#include <ctype.h>
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#endif
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#ifdef HAVE_GRP_H
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#include <grp.h>
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#endif
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#include <errno.h>
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#if defined(HAVE_MMAP) && defined(HAVE_MUNMAP)
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#include <sys/mman.h>
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#define USE_MMAP 1
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#endif
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#ifdef HAVE_UTIME_H
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#include <utime.h>
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#endif
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#ifdef HAVE_SYS_SELECT_H
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#include <sys/select.h>
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#endif
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#ifdef HAVE_SYS_MODE_H
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/* apparently AIX needs this for S_ISLNK */
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#ifndef S_ISLNK
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#include <sys/mode.h>
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#endif
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#endif
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#ifdef HAVE_FNMATCH
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#include <fnmatch.h>
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#else
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#include "lib/fnmatch.h"
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#endif
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#ifdef HAVE_GETOPT_LONG
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#include <getopt.h>
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#else
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#include "lib/getopt.h"
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#endif
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#ifdef HAVE_GLOB
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#include <glob.h>
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#endif
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/* these are needed for the uid/gid mapping code */
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#include <pwd.h>
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#include <grp.h>
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#include <stdarg.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <syslog.h>
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#include <sys/file.h>
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#if HAVE_DIRENT_H
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# include <dirent.h>
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#else
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# define dirent direct
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# if HAVE_SYS_NDIR_H
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# include <sys/ndir.h>
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# endif
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# if HAVE_SYS_DIR_H
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# include <sys/dir.h>
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# endif
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# if HAVE_NDIR_H
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# include <ndir.h>
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# endif
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#endif
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#ifdef HAVE_COMPAT_H
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#include <compat.h>
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#endif
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#ifndef S_IFLNK
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#define S_IFLNK 0120000
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#endif
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#ifndef S_ISLNK
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#define S_ISLNK(mode) (((mode) & S_IFLNK) == S_IFLNK)
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#endif
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#define BOOL int
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#ifndef uchar
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#define uchar unsigned char
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#endif
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#if HAVE_UNSIGNED_CHAR
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#define schar signed char
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#else
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#define schar char
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#endif
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#ifndef int32
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#if (SIZEOF_INT == 4)
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#define int32 int
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#elif (SIZEOF_LONG == 4)
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#define int32 long
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#elif (SIZEOF_SHORT == 4)
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#define int32 short
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#endif
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#endif
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#ifndef uint32
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#define uint32 unsigned int32
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#endif
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#if HAVE_OFF64_T
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#define OFF_T off64_t
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#define STRUCT_STAT struct stat64
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#else
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#define OFF_T off_t
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#define STRUCT_STAT struct stat
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#endif
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#if HAVE_OFF64_T
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#define int64 off64_t
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#elif (SIZEOF_LONG == 8)
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#define int64 long
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#elif (SIZEOF_INT == 8)
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#define int64 int
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#elif HAVE_LONGLONG
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#define int64 long long
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#else
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#define int64 off_t
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#define NO_INT64
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#endif
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#ifndef MIN
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#define MIN(a,b) ((a)<(b)?(a):(b))
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#endif
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#ifndef MAX
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#define MAX(a,b) ((a)>(b)?(a):(b))
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#endif
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/* the length of the md4 checksum */
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#define MD4_SUM_LENGTH 16
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#define SUM_LENGTH 16
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#ifndef MAXPATHLEN
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#define MAXPATHLEN 1024
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#endif
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#ifndef INADDR_NONE
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#define INADDR_NONE 0xffffffff
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#endif
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struct file_struct {
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unsigned flags;
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time_t modtime;
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OFF_T length;
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mode_t mode;
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ino_t inode;
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dev_t dev;
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dev_t rdev;
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uid_t uid;
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gid_t gid;
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char *basename;
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char *dirname;
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char *basedir;
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char *link;
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char *sum;
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};
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struct file_list {
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int count;
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int malloced;
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struct file_struct **files;
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};
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struct sum_buf {
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OFF_T offset; /* offset in file of this chunk */
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int len; /* length of chunk of file */
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int i; /* index of this chunk */
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uint32 sum1; /* simple checksum */
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char sum2[SUM_LENGTH]; /* checksum */
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};
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struct sum_struct {
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OFF_T flength; /* total file length */
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int count; /* how many chunks */
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int remainder; /* flength % block_length */
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int n; /* block_length */
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struct sum_buf *sums; /* points to info for each chunk */
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};
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struct map_struct {
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char *map,*p;
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int fd,p_size,p_len;
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OFF_T size, p_offset;
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};
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struct exclude_struct {
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char *orig;
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char *pattern;
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int regular_exp;
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int include;
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int directory;
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int local;
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};
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struct stats {
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int64 total_size;
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int64 total_transferred_size;
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int64 total_written;
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int64 total_read;
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int64 literal_data;
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int64 matched_data;
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int flist_size;
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int num_files;
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int num_transferred_files;
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};
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/* we need this function because of the silly way in which duplicate
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entries are handled in the file lists - we can't change this
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without breaking existing versions */
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static inline int flist_up(struct file_list *flist, int i)
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{
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while (!flist->files[i]->basename) i++;
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return i;
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}
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#include "byteorder.h"
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#include "version.h"
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#include "proto.h"
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#include "md4.h"
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#if !HAVE_STRERROR
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extern char *sys_errlist[];
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#define strerror(i) sys_errlist[i]
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#endif
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#ifndef HAVE_STRCHR
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# define strchr index
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# define strrchr rindex
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#endif
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#ifndef HAVE_ERRNO_DECL
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extern int errno;
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#endif
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#define SUPPORT_LINKS HAVE_READLINK
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#define SUPPORT_HARD_LINKS HAVE_LINK
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#ifndef HAVE_LCHOWN
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#define lchown chown
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#endif
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#define SIGNAL_CAST (RETSIGTYPE (*)())
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#ifndef EWOULDBLOCK
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#define EWOULDBLOCK EAGAIN
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#endif
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#ifndef STDIN_FILENO
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#define STDIN_FILENO 0
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#endif
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#ifndef STDOUT_FILENO
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#define STDOUT_FILENO 1
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#endif
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#ifndef STDERR_FILENO
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#define STDERR_FILENO 2
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#endif
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#ifndef S_IWUSR
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#define S_IWUSR 0200
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#endif
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#ifndef S_ISBLK
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#define S_ISBLK(mode) (((mode) & (_S_IFMT)) == (_S_IFBLK))
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#endif
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#ifndef S_ISCHR
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#define S_ISCHR(mode) (((mode) & (_S_IFMT)) == (_S_IFCHR))
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#endif
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#ifndef S_ISSOCK
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#ifdef _S_IFSOCK
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#define S_ISSOCK(mode) (((mode) & (_S_IFMT)) == (_S_IFSOCK))
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#else
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#define S_ISSOCK(mode) (0)
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#endif
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#endif
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#ifndef S_ISFIFO
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#ifdef _S_IFIFO
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#define S_ISFIFO(mode) (((mode) & (_S_IFMT)) == (_S_IFIFO))
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#else
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#define S_ISFIFO(mode) (0)
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#endif
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#endif
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#ifndef S_ISDIR
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#define S_ISDIR(mode) (((mode) & (_S_IFMT)) == (_S_IFDIR))
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#endif
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#ifndef S_ISREG
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#define S_ISREG(mode) (((mode) & (_S_IFMT)) == (_S_IFREG))
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#endif
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#define IS_DEVICE(mode) (S_ISCHR(mode) || S_ISBLK(mode) || S_ISSOCK(mode) || S_ISFIFO(mode))
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#ifndef ACCESSPERMS
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#define ACCESSPERMS 0777
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#endif
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