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) /* receiver/generator */
62 #define FLAG_MOUNT_POINT (1<<2) /* sender */
63 #define FLAG_NO_FUZZY (1<<2) /* generator */
64 #define FLAG_DEL_HERE (1<<3) /* receiver/generator */
65 #define FLAG_SENT (1<<3) /* sender */
66 #define FLAG_HLINK_TOL (1<<4) /* receiver/generator */
68 /* update this if you make incompatible changes */
69 #define PROTOCOL_VERSION 29
71 /* We refuse to interoperate with versions that are not in this range.
72 * Note that we assume we'll work with later versions: the onus is on
73 * people writing them to make sure that they don't send us anything
74 * we won't understand.
76 * Interoperation with old but supported protocol versions
77 * should cause a warning to be printed. At a future date
78 * the old protocol will become the minimum and
79 * compatibility code removed.
81 * There are two possible explanations for the limit at
82 * MAX_PROTOCOL_VERSION: either to allow new major-rev versions that
83 * do not interoperate with us, and (more likely) so that we can
84 * detect an attempt to connect rsync to a non-rsync server, which is
85 * unlikely to begin by sending a byte between MIN_PROTOCL_VERSION and
86 * MAX_PROTOCOL_VERSION. */
88 #define MIN_PROTOCOL_VERSION 20
89 #define OLD_PROTOCOL_VERSION 25
90 #define MAX_PROTOCOL_VERSION 40
92 #define RSYNC_PORT 873
94 #define SPARSE_WRITE_SIZE (1024)
95 #define WRITE_SIZE (32*1024)
96 #define CHUNK_SIZE (32*1024)
97 #define MAX_MAP_SIZE (256*1024)
98 #define IO_BUFFER_SIZE (4092)
99 #define MAX_BLOCK_SIZE ((int32)1 << 29)
101 #define IOERR_GENERAL (1<<0) /* For backward compatibility, this must == 1 */
102 #define IOERR_VANISHED (1<<1)
103 #define IOERR_DEL_LIMIT (1<<2)
105 #define MAX_ARGS 1000
106 #define MAX_BASIS_DIRS 20
107 #define MAX_SERVER_ARGS (MAX_BASIS_DIRS*2 + 100)
112 #define SERVER_FILTERS 1
113 #define ALL_FILTERS 2
115 #define XFLG_FATAL_ERRORS (1<<0)
116 #define XFLG_OLD_PREFIXES (1<<1)
117 #define XFLG_ANCHORED2ABS (1<<2)
118 #define XFLG_ABS_IF_SLASH (1<<3)
120 #define PERMS_REPORT (1<<0)
121 #define PERMS_SKIP_MTIME (1<<1)
124 #define NORMAL_FLUSH 0
126 #define PDIR_CREATE 1
127 #define PDIR_DELETE 0
129 /* Note: 0x00 - 0x7F are used for basis_dir[] indexes! */
130 #define FNAMECMP_BASIS_DIR_LOW 0x00 /* Must remain 0! */
131 #define FNAMECMP_BASIS_DIR_HIGH 0x7F
132 #define FNAMECMP_FNAME 0x80
133 #define FNAMECMP_PARTIAL_DIR 0x81
134 #define FNAMECMP_BACKUP 0x82
135 #define FNAMECMP_FUZZY 0x83
137 /* For use by the itemize_changes code */
138 #define ITEM_REPORT_CHECKSUM (1<<1)
139 #define ITEM_REPORT_SIZE (1<<2)
140 #define ITEM_REPORT_TIME (1<<3)
141 #define ITEM_REPORT_PERMS (1<<4)
142 #define ITEM_REPORT_OWNER (1<<5)
143 #define ITEM_REPORT_GROUP (1<<6)
144 #define ITEM_REPORT_XATTRS (1<<7)
145 #define ITEM_BASIS_TYPE_FOLLOWS (1<<11)
146 #define ITEM_XNAME_FOLLOWS (1<<12)
147 #define ITEM_IS_NEW (1<<13)
148 #define ITEM_LOCAL_CHANGE (1<<14)
149 #define ITEM_TRANSFER (1<<15)
150 /* These are outside the range of the transmitted flags. */
151 #define ITEM_NO_DEST_AND_NO_UPDATE (1<<16) /* used by itemize() */
152 #define ITEM_MISSING_DATA (1<<16) /* used by log_formatted() */
153 #define ITEM_DELETED (1<<17) /* used by log_formatted() */
155 #define SIGNIFICANT_ITEM_FLAGS (~(\
156 ITEM_BASIS_TYPE_FOLLOWS | ITEM_XNAME_FOLLOWS | ITEM_LOCAL_CHANGE))
159 /* Log-message categories. FLOG and FCLIENT are only used on the daemon
160 * side for custom logging -- they don't get sent over the socket. */
161 enum logcode { FERROR=1, FINFO=2, FLOG=3, FCLIENT=4 };
163 /* Messages types that are sent over the message channel. The logcode
164 * values must all be present here with identical numbers. */
166 MSG_DATA=0, /* raw data on the multiplexed stream */
167 MSG_ERROR=FERROR, MSG_INFO=FINFO, /* remote logging */
168 MSG_LOG=FLOG, MSG_FCLIENT=FCLIENT, /* sibling logging */
169 MSG_REDO=9, /* reprocess indicated flist index */
170 MSG_SUCCESS=100,/* successfully updated indicated flist index */
171 MSG_DELETED=101,/* successfully deleted a file on receiving side */
172 MSG_DONE=86 /* current phase is done */
179 /* The default RSYNC_RSH is always set in config.h. */
182 #ifdef HAVE_SYS_TYPES_H
183 # include <sys/types.h>
185 #ifdef HAVE_SYS_STAT_H
186 # include <sys/stat.h>
192 # ifdef HAVE_STDLIB_H
197 # if !defined STDC_HEADERS && defined HAVE_MEMORY_H
202 #ifdef HAVE_STRINGS_H
203 # include <strings.h>
209 #ifdef HAVE_SYS_PARAM_H
210 #include <sys/param.h>
213 #if defined HAVE_MALLOC_H && (defined HAVE_MALLINFO || !defined HAVE_STDLIB_H)
217 #ifdef HAVE_SYS_SOCKET_H
218 #include <sys/socket.h>
221 #ifdef TIME_WITH_SYS_TIME
222 #include <sys/time.h>
225 #ifdef HAVE_SYS_TIME_H
226 #include <sys/time.h>
235 #ifdef HAVE_SYS_FCNTL_H
236 #include <sys/fcntl.h>
240 #ifdef HAVE_SYS_IOCTL_H
241 #include <sys/ioctl.h>
244 #ifdef HAVE_SYS_FILIO_H
245 #include <sys/filio.h>
249 #ifdef HAVE_SYS_WAIT_H
250 #include <sys/wait.h>
264 #ifdef HAVE_SYS_SELECT_H
265 #include <sys/select.h>
268 #ifdef HAVE_SYS_MODE_H
269 /* apparently AIX needs this for S_ISLNK */
271 #include <sys/mode.h>
279 /* these are needed for the uid/gid mapping code */
284 #include <netinet/in.h>
285 #include <arpa/inet.h>
288 #include <sys/file.h>
293 # define dirent direct
294 # ifdef HAVE_SYS_NDIR_H
295 # include <sys/ndir.h>
297 # ifdef HAVE_SYS_DIR_H
298 # include <sys/dir.h>
305 #ifdef MAJOR_IN_MKDEV
306 #include <sys/mkdev.h>
307 # if !defined makedev && (defined mkdev || defined _WIN32 || defined __WIN32__)
308 # define makedev mkdev
310 #elif defined MAJOR_IN_SYSMACROS
311 #include <sys/sysmacros.h>
324 #include "lib/pool_alloc.h"
329 #define uchar unsigned char
332 #ifdef SIGNED_CHAR_OK
333 #define schar signed char
338 /* Find a variable that is either exactly 32-bits or longer.
339 * If some code depends on 32-bit truncation, it will need to
340 * take special action in a "#if SIZEOF_INT32 > 4" section. */
344 # define SIZEOF_INT32 4
345 #elif SIZEOF_LONG == 4
347 # define SIZEOF_INT32 4
348 #elif SIZEOF_SHORT == 4
350 # define SIZEOF_INT32 4
353 # define SIZEOF_INT32 SIZEOF_INT
354 #elif SIZEOF_LONG > 4
356 # define SIZEOF_INT32 SIZEOF_LONG
358 # error Could not find a 32-bit integer variable
361 # define SIZEOF_INT32 4
365 #define uint32 unsigned int32
368 #if SIZEOF_OFF_T == 8 || !SIZEOF_OFF64_T || !defined HAVE_STRUCT_STAT64
370 #define STRUCT_STAT struct stat
372 #define OFF_T off64_t
373 #define STRUCT_STAT struct stat64
374 #define USE_STAT64_FUNCS 1
377 /* CAVEAT: on some systems, int64 will really be a 32-bit integer IFF
378 * that's the maximum size the file system can handle and there is no
379 * 64-bit type available. The rsync source must therefore take steps
380 * to ensure that any code that really requires a 64-bit integer has
381 * it (e.g. the checksum code uses two 32-bit integers for its 64-bit
383 #if SIZEOF_OFF64_T == 8
384 # define int64 off64_t
385 # define SIZEOF_INT64 8
386 #elif SIZEOF_LONG == 8
388 # define SIZEOF_INT64 8
389 #elif SIZEOF_INT == 8
391 # define SIZEOF_INT64 8
392 #elif SIZEOF_LONG_LONG == 8
393 # define int64 long long
394 # define SIZEOF_INT64 8
395 #elif SIZEOF_OFF_T == 8
397 # define SIZEOF_INT64 8
400 # define SIZEOF_INT64 SIZEOF_INT
401 #elif SIZEOF_LONG > 8
403 # define SIZEOF_INT64 SIZEOF_LONG
404 #elif SIZEOF_LONG_LONG > 8
405 # define int64 long long
406 # define SIZEOF_INT64 SIZEOF_LONG_LONG
408 /* As long as it gets... */
410 # define SIZEOF_INT64 SIZEOF_OFF_T
413 /* Starting from protocol version 26, we always use 64-bit
414 * ino_t and dev_t internally, even if this platform does not
415 * allow files to have 64-bit inums. That's because the
416 * receiver needs to find duplicate (dev,ino) tuples to detect
417 * hardlinks, and it might have files coming from a platform
418 * that has 64-bit inums.
420 * The only exception is if we're on a platform with no 64-bit type at
423 * Because we use read_longint() to get these off the wire, if you
424 * transfer devices or hardlinks with dev or inum > 2**32 to a machine
425 * with no 64-bit types then you will get an overflow error. Probably
426 * not many people have that combination of machines, and you can
427 * avoid it by not preserving hardlinks or not transferring device
428 * nodes. It's not clear that any other behaviour is better.
430 * Note that if you transfer devices from a 64-bit-devt machine (say,
431 * Solaris) to a 32-bit-devt machine (say, Linux-2.2/x86) then the
432 * device numbers will be truncated. But it's a kind of silly thing
435 * FIXME: I don't think the code in flist.c has ever worked on a system
436 * where dev_t is a struct.
445 #define MIN(a,b) ((a)<(b)?(a):(b))
449 #define MAX(a,b) ((a)>(b)?(a):(b))
452 #ifndef MAXHOSTNAMELEN
453 #define MAXHOSTNAMELEN 256
456 /* the length of the md4 checksum */
457 #define MD4_SUM_LENGTH 16
458 #define SUM_LENGTH 16
459 #define SHORT_SUM_LENGTH 2
460 #define BLOCKSUM_BIAS 10
463 #define MAXPATHLEN 1024
466 /* We want a roomy line buffer that can hold more than MAXPATHLEN,
467 * and significantly more than an overly short MAXPATHLEN. */
468 #if MAXPATHLEN < 4096
469 #define BIGPATHBUFLEN (4096+1024)
471 #define BIGPATHBUFLEN (MAXPATHLEN+1024)
479 #define INADDR_NONE 0xffffffff
482 #ifndef IN_LOOPBACKNET
483 #define IN_LOOPBACKNET 127
486 #define GID_NONE ((gid_t)-1)
488 #define HL_CHECK_MASTER 0
496 #define F_DEV link_u.idev->dev
497 #define F_INODE link_u.idev->inode
499 #define F_HLINDEX link_u.links->hlindex
500 #define F_NEXT link_u.links->next
504 dev_t rdev; /* The device number, if this is a device */
505 char *sum; /* Only a normal file can have a checksum */
506 char *link; /* Points to symlink string, if a symlink */
509 char *basename; /* The current item's name (AKA filename) */
510 char *dirname; /* The directory info inside the transfer */
512 char *root; /* Sender-side dir info outside transfer */
513 int depth; /* Receiver-side directory depth info */
523 uchar flags; /* this item MUST remain last */
527 * Start the flist array at FLIST_START entries and grow it
528 * by doubling until FLIST_LINEAR then grow by FLIST_LINEAR
530 #define FLIST_START (32 * 1024)
531 #define FLIST_LINEAR (FLIST_START * 512)
534 * Extent size for allocation pools A minimum size of 128KB
535 * is needed to mmap them so that freeing will release the
538 * Larger sizes reduce leftover fragments and speed free calls
539 * (when they happen) Smaller sizes increase the chance of
540 * freed allocations freeing whole extents.
542 #define FILE_EXTENT (256 * 1024)
543 #define HLINK_EXTENT (128 * 1024)
546 #define WITHOUT_HLINK 0
549 struct file_struct **files;
550 alloc_pool_t file_pool;
551 alloc_pool_t hlink_pool;
557 #define SUMFLG_SAME_OFFSET (1<<0)
560 OFF_T offset; /**< offset in file of this chunk */
561 int32 len; /**< length of chunk of file */
562 uint32 sum1; /**< simple checksum */
563 short flags; /**< flag bits */
564 char sum2[SUM_LENGTH]; /**< checksum */
568 OFF_T flength; /**< total file length */
569 struct sum_buf *sums; /**< points to info for each chunk */
570 int32 count; /**< how many chunks */
571 int32 blength; /**< block_length */
572 int32 remainder; /**< flength % block_length */
573 int s2length; /**< sum2_length */
577 OFF_T file_size; /* File size (from stat) */
578 OFF_T p_offset; /* Window start */
579 OFF_T p_fd_offset; /* offset of cursor in fd ala lseek */
580 char *p; /* Window pointer */
581 int32 p_size; /* Largest window size we allocated */
582 int32 p_len; /* Latest (rounded) window size */
583 int32 def_window_size; /* Default window size */
584 int fd; /* File Descriptor */
585 int status; /* first errno from read errors */
588 #define MATCHFLG_WILD (1<<0) /* pattern has '*', '[', and/or '?' */
589 #define MATCHFLG_WILD2 (1<<1) /* pattern has '**' */
590 #define MATCHFLG_WILD2_PREFIX (1<<2) /* pattern starts with '**' */
591 #define MATCHFLG_ABS_PATH (1<<3) /* path-match on absolute path */
592 #define MATCHFLG_INCLUDE (1<<4) /* this is an include, not an exclude */
593 #define MATCHFLG_DIRECTORY (1<<5) /* this matches only directories */
594 #define MATCHFLG_CLEAR_LIST (1<<6) /* this item is the "!" token */
595 #define MATCHFLG_WORD_SPLIT (1<<7) /* split rules on whitespace */
596 #define MATCHFLG_NO_INHERIT (1<<8) /* don't inherit these rules */
597 #define MATCHFLG_NO_PREFIXES (1<<9) /* parse no prefixes from patterns */
598 #define MATCHFLG_MERGE_FILE (1<<10)/* specifies a file to merge */
599 #define MATCHFLG_PERDIR_MERGE (1<<11)/* merge-file is searched per-dir */
600 #define MATCHFLG_EXCLUDE_SELF (1<<12)/* merge-file name should be excluded */
601 #define MATCHFLG_FINISH_SETUP (1<<13)/* per-dir merge file needs setup */
602 #define MATCHFLG_NEGATE (1<<14)/* rule matches when pattern does not */
603 #define MATCHFLG_CVS_IGNORE (1<<15)/* rule was -C or :C */
604 #define MATCHFLG_SENDER_SIDE (1<<16)/* rule applies to the sending side */
605 #define MATCHFLG_RECEIVER_SIDE (1<<17)/* rule applies to the receiving side */
607 #define MATCHFLGS_FROM_CONTAINER (MATCHFLG_ABS_PATH | MATCHFLG_INCLUDE \
608 | MATCHFLG_DIRECTORY | MATCHFLG_SENDER_SIDE \
609 | MATCHFLG_NEGATE | MATCHFLG_RECEIVER_SIDE)
611 struct filter_struct {
612 struct filter_struct *next;
617 struct filter_list_struct *mergelist;
621 struct filter_list_struct {
622 struct filter_struct *head;
623 struct filter_struct *tail;
629 int64 total_transferred_size;
634 int64 flist_buildtime;
635 int64 flist_xfertime;
638 int num_transferred_files;
639 int current_file_index;
643 #include "byteorder.h"
644 #include "lib/mdfour.h"
645 #include "lib/wildmatch.h"
646 #include "lib/permstring.h"
647 #include "lib/addrinfo.h"
651 /* We have replacement versions of these if they're missing. */
652 #ifndef HAVE_ASPRINTF
653 int asprintf(char **ptr, const char *format, ...);
656 #ifndef HAVE_VASPRINTF
657 int vasprintf(char **ptr, const char *format, va_list ap);
660 #if !defined HAVE_VSNPRINTF || !defined HAVE_C99_VSNPRINTF
661 #define vsnprintf rsync_vsnprintf
662 int vsnprintf(char *str, size_t count, const char *fmt, va_list args);
665 #if !defined HAVE_SNPRINTF || !defined HAVE_C99_VSNPRINTF
666 #define snprintf rsync_snprintf
667 int snprintf(char *str,size_t count,const char *fmt,...);
671 #ifndef HAVE_STRERROR
672 extern char *sys_errlist[];
673 #define strerror(i) sys_errlist[i]
677 # define strchr index
678 # define strrchr rindex
681 #ifndef HAVE_ERRNO_DECL
686 #define SUPPORT_LINKS 1
689 #define SUPPORT_HARD_LINKS 1
692 #define SIGNAL_CAST (RETSIGTYPE (*)())
695 #define EWOULDBLOCK EAGAIN
699 #define STDIN_FILENO 0
702 #ifndef STDOUT_FILENO
703 #define STDOUT_FILENO 1
706 #ifndef STDERR_FILENO
707 #define STDERR_FILENO 2
719 #define ACCESSPERMS 0777
726 #define CHMOD_BITS (S_ISUID | S_ISGID | S_ISVTX | ACCESSPERMS)
729 #define _S_IFMT 0170000
733 #define _S_IFLNK 0120000
737 #define S_ISLNK(mode) (((mode) & (_S_IFMT)) == (_S_IFLNK))
741 #define S_ISBLK(mode) (((mode) & (_S_IFMT)) == (_S_IFBLK))
745 #define S_ISCHR(mode) (((mode) & (_S_IFMT)) == (_S_IFCHR))
750 #define S_ISSOCK(mode) (((mode) & (_S_IFMT)) == (_S_IFSOCK))
752 #define S_ISSOCK(mode) (0)
758 #define S_ISFIFO(mode) (((mode) & (_S_IFMT)) == (_S_IFIFO))
760 #define S_ISFIFO(mode) (0)
765 #define S_ISDIR(mode) (((mode) & (_S_IFMT)) == (_S_IFDIR))
769 #define S_ISREG(mode) (((mode) & (_S_IFMT)) == (_S_IFREG))
772 /* work out what fcntl flag to use for non-blocking */
774 # define NONBLOCK_FLAG O_NONBLOCK
776 # define NONBLOCK_FLAG O_NDELAY
778 # define NONBLOCK_FLAG FNDELAY
781 #ifndef INADDR_LOOPBACK
782 #define INADDR_LOOPBACK 0x7f000001
786 #define INADDR_NONE 0xffffffff
789 #define IS_DEVICE(mode) (S_ISCHR(mode) || S_ISBLK(mode) || S_ISSOCK(mode) || S_ISFIFO(mode))
791 /* Initial mask on permissions given to temporary files. Mask off setuid
792 bits and group access because of potential race-condition security
793 holes, and mask other access because mode 707 is bizarre */
794 #define INITACCESSPERMS 0700
796 /* handler for null strings in printf format */
797 #define NS(s) ((s)?safe_fname(s):"<NULL>")
799 #if !defined __GNUC__ || defined __APPLE__
800 /* Apparently the OS X port of gcc gags on __attribute__.
802 * <http://www.opensource.apple.com/bugs/X/gcc/2512150.html> */
803 #define __attribute__(x)
807 /* Convenient wrappers for malloc and realloc. Use them. */
808 #define new(type) ((type *)malloc(sizeof(type)))
809 #define new_array(type, num) ((type *)_new_array(sizeof(type), (num)))
810 #define realloc_array(ptr, type, num) ((type *)_realloc_array((ptr), sizeof(type), (num)))
812 /* use magic gcc attributes to catch format errors */
813 void rprintf(enum logcode , const char *, ...)
814 __attribute__((format (printf, 2, 3)))
817 /* This is just like rprintf, but it also tries to print some
818 * representation of the error code. Normally errcode = errno. */
819 void rsyserr(enum logcode, int, const char *, ...)
820 __attribute__((format (printf, 3, 4)))
823 #ifdef REPLACE_INET_NTOA
824 #define inet_ntoa rep_inet_ntoa
827 /* Make sure that the O_BINARY flag is defined. */
833 size_t strlcpy(char *d, const char *s, size_t bufsize);
837 size_t strlcat(char *d, const char *s, size_t bufsize);
841 #define WEXITSTATUS(stat) ((int)(((stat)>>8)&0xFF))
844 #define exit_cleanup(code) _exit_cleanup(code, __FILE__, __LINE__)
847 #define MY_UID() geteuid()
849 #define MY_UID() getuid()
853 #define MY_GID() getegid()
855 #define MY_GID() getgid()
860 #ifndef HAVE_INET_NTOP
861 const char *inet_ntop(int af, const void *src, char *dst, size_t size);
864 #ifndef HAVE_INET_PTON
865 int inet_pton(int af, const char *src, void *dst);
868 #ifdef MAINTAINER_MODE
869 const char *get_panic_action(void);
872 #define UNUSED(x) x __attribute__((__unused__))
874 extern const char *io_write_phase, *io_read_phase;