Annotation of src/usr.bin/rsync/extern.h, Revision 1.44
1.44 ! job 1: /* $OpenBSD: extern.h,v 1.43 2021/10/29 08:00:59 claudio Exp $ */
1.1 benno 2: /*
3: * Copyright (c) 2019 Kristaps Dzonsons <kristaps@bsd.lv>
4: *
5: * Permission to use, copy, modify, and distribute this software for any
6: * purpose with or without fee is hereby granted, provided that the above
7: * copyright notice and this permission notice appear in all copies.
8: *
9: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16: */
17: #ifndef EXTERN_H
18: #define EXTERN_H
19:
20: /*
21: * This is the rsync protocol version that we support.
22: */
23: #define RSYNC_PROTOCOL (27)
24:
25: /*
26: * Maximum amount of file data sent over the wire at once.
27: */
28: #define MAX_CHUNK (32 * 1024)
29:
30: /*
31: * This is the minimum size for a block of data not including those in
32: * the remainder block.
33: */
34: #define BLOCK_SIZE_MIN (700)
35:
36: /*
1.42 claudio 37: * Maximum number of base directories that can be used.
38: */
39: #define MAX_BASEDIR 20
40:
41: #define BASE_MODE_COMPARE 1
42: #define BASE_MODE_COPY 2
43: #define BASE_MODE_LINK 3
44:
45: /*
1.1 benno 46: * The sender and receiver use a two-phase synchronisation process.
47: * The first uses two-byte hashes; the second, 16-byte.
48: * (The second must hold a full MD4 digest.)
49: */
50: #define CSUM_LENGTH_PHASE1 (2)
51: #define CSUM_LENGTH_PHASE2 (16)
1.37 claudio 52:
53: /*
54: * Rsync error codes.
55: */
56: #define ERR_SYNTAX 1
57: #define ERR_PROTOCOL 2
58: #define ERR_SOCK_IO 10
59: #define ERR_FILE_IO 11
60: #define ERR_WIREPROTO 12
61: #define ERR_IPC 14 /* catchall for any kind of syscall error */
62: #define ERR_TERMIMATED 16
63: #define ERR_WAITPID 21
64: #define ERR_NOMEM 22
1.1 benno 65:
1.14 florian 66: /*
1.34 claudio 67: * Use this for --timeout.
1.14 florian 68: * All poll events will use it and catch time-outs.
69: */
1.34 claudio 70: extern int poll_timeout;
1.44 ! job 71:
! 72: /*
! 73: * Use this for --contimeout.
! 74: */
! 75: extern int poll_contimeout;
1.13 florian 76:
1.1 benno 77: /*
78: * Operating mode for a client or a server.
79: * Sender means we synchronise local files with those from remote.
80: * Receiver is the opposite.
81: * This is relative to which host we're running on.
82: */
83: enum fmode {
84: FARGS_SENDER,
85: FARGS_RECEIVER
86: };
87:
88: /*
89: * File arguments given on the command line.
90: * See struct opts.
91: */
92: struct fargs {
93: char *host; /* hostname or NULL if local */
94: char **sources; /* transfer source */
95: size_t sourcesz; /* number of sources */
96: char *sink; /* transfer endpoint */
97: enum fmode mode; /* mode of operation */
98: int remote; /* uses rsync:// or :: for remote */
99: char *module; /* if rsync://, the module */
100: };
101:
102: /*
103: * The subset of stat(2) information that we need.
104: * (There are some parts we don't use yet.)
105: */
106: struct flstat {
1.12 florian 107: mode_t mode; /* mode */
108: uid_t uid; /* user */
109: gid_t gid; /* group */
110: dev_t rdev; /* device type */
111: off_t size; /* size */
112: time_t mtime; /* modification */
1.1 benno 113: unsigned int flags;
1.12 florian 114: #define FLSTAT_TOP_DIR 0x01 /* a top-level directory */
1.1 benno 115:
116: };
117:
118: /*
119: * A list of files with their statistics.
120: */
121: struct flist {
122: char *path; /* path relative to root */
123: const char *wpath; /* "working" path for receiver */
124: struct flstat st; /* file information */
125: char *link; /* symlink target or NULL */
126: };
127:
128: /*
129: * Options passed into the command line.
130: * See struct fargs.
131: */
132: struct opts {
1.3 deraadt 133: int sender; /* --sender */
134: int server; /* --server */
135: int recursive; /* -r */
136: int dry_run; /* -n */
137: int preserve_times; /* -t */
138: int preserve_perms; /* -p */
139: int preserve_links; /* -l */
1.5 benno 140: int preserve_gids; /* -g */
1.9 florian 141: int preserve_uids; /* -u */
1.3 deraadt 142: int del; /* --delete */
1.12 florian 143: int devices; /* --devices */
144: int specials; /* --specials */
1.36 job 145: int no_motd; /* --no-motd */
1.22 benno 146: int numeric_ids; /* --numeric-ids */
1.28 bket 147: int one_file_system; /* -x */
1.42 claudio 148: int alt_base_mode;
1.43 claudio 149: off_t max_size; /* --max-size */
150: off_t min_size; /* --min-size */
1.3 deraadt 151: char *rsync_path; /* --rsync-path */
1.4 deraadt 152: char *ssh_prog; /* --rsh or -e */
1.18 deraadt 153: char *port; /* --port */
1.32 claudio 154: char *address; /* --address */
1.42 claudio 155: char *basedir[MAX_BASEDIR];
1.1 benno 156: };
157:
1.40 claudio 158: enum rule_type {
159: RULE_NONE,
160: RULE_EXCLUDE,
161: RULE_INCLUDE,
162: RULE_CLEAR,
163: #ifdef NOTYET
164: RULE_MERGE,
165: RULE_DIR_MERGE,
166: RULE_SHOW,
167: RULE_HIDE,
168: RULE_PROTECT,
169: RULE_RISK,
170: #endif
171: };
172:
1.1 benno 173: /*
174: * An individual block description for a file.
175: * See struct blkset.
176: */
177: struct blk {
178: off_t offs; /* offset in file */
179: size_t idx; /* block index */
180: size_t len; /* bytes in block */
181: uint32_t chksum_short; /* fast checksum */
182: unsigned char chksum_long[CSUM_LENGTH_PHASE2]; /* slow checksum */
183: };
184:
1.14 florian 185: enum blkstatst {
186: BLKSTAT_NONE = 0,
1.21 benno 187: BLKSTAT_NEXT,
1.14 florian 188: BLKSTAT_DATA,
189: BLKSTAT_TOK,
190: BLKSTAT_HASH,
1.21 benno 191: BLKSTAT_DONE,
192: BLKSTAT_PHASE,
1.14 florian 193: };
194:
1.1 benno 195: /*
1.13 florian 196: * Information for the sender updating receiver blocks reentrantly.
197: */
198: struct blkstat {
1.14 florian 199: off_t offs; /* position in sender file */
200: off_t total; /* total amount processed */
201: off_t dirty; /* total amount sent */
202: size_t hint; /* optimisation: next probable match */
203: void *map; /* mapped file or MAP_FAILED otherwise */
204: size_t mapsz; /* size of file or zero */
205: int fd; /* descriptor girding the map */
206: enum blkstatst curst; /* FSM for sending file blocks */
207: off_t curpos; /* sending: position in file to send */
208: off_t curlen; /* sending: length of send */
209: int32_t curtok; /* sending: next matching token or zero */
1.31 florian 210: struct blktab *blktab; /* hashtable of blocks */
211: uint32_t s1; /* partial sum for computing fast hash */
212: uint32_t s2; /* partial sum for computing fast hash */
1.13 florian 213: };
214:
215: /*
1.1 benno 216: * When transferring file contents, we break the file down into blocks
217: * and work with those.
218: */
219: struct blkset {
220: off_t size; /* file size */
221: size_t rem; /* terminal block length if non-zero */
222: size_t len; /* block length */
223: size_t csum; /* checksum length */
224: struct blk *blks; /* all blocks */
225: size_t blksz; /* number of blks */
226: };
227:
228: /*
229: * Values required during a communication session.
230: */
231: struct sess {
232: const struct opts *opts; /* system options */
233: int32_t seed; /* checksum seed */
234: int32_t lver; /* local version */
235: int32_t rver; /* remote version */
236: uint64_t total_read; /* non-logging wire/reads */
237: uint64_t total_size; /* total file size */
238: uint64_t total_write; /* non-logging wire/writes */
239: int mplex_reads; /* multiplexing reads? */
240: size_t mplex_read_remain; /* remaining bytes */
241: int mplex_writes; /* multiplexing writes? */
242: };
243:
1.6 benno 244: /*
245: * Combination of name and numeric id for groups and users.
246: */
247: struct ident {
248: int32_t id; /* the gid_t or uid_t */
249: int32_t mapped; /* if receiving, the mapped gid */
250: char *name; /* resolved name */
251: };
1.27 deraadt 252:
253: typedef struct arglist arglist;
254: struct arglist {
255: char **list;
256: u_int num;
257: u_int nalloc;
258: };
1.35 claudio 259: void addargs(arglist *, const char *, ...)
1.27 deraadt 260: __attribute__((format(printf, 2, 3)));
261: void freeargs(arglist *);
1.6 benno 262:
1.1 benno 263: struct download;
264: struct upload;
265:
1.29 benno 266: extern int verbose;
267:
1.17 deraadt 268: #define MINIMUM(a, b) (((a) < (b)) ? (a) : (b))
1.14 florian 269:
1.29 benno 270: #define LOG0(_fmt, ...) \
1.33 deraadt 271: rsync_log( -1, (_fmt), ##__VA_ARGS__)
1.29 benno 272: #define LOG1(_fmt, ...) \
1.33 deraadt 273: rsync_log( 0, (_fmt), ##__VA_ARGS__)
1.29 benno 274: #define LOG2(_fmt, ...) \
1.33 deraadt 275: rsync_log( 1, (_fmt), ##__VA_ARGS__)
1.29 benno 276: #define LOG3(_fmt, ...) \
1.33 deraadt 277: rsync_log( 2, (_fmt), ##__VA_ARGS__)
1.29 benno 278: #define LOG4(_fmt, ...) \
1.33 deraadt 279: rsync_log( 3, (_fmt), ##__VA_ARGS__)
1.29 benno 280: #define ERRX1(_fmt, ...) \
1.33 deraadt 281: rsync_errx1( (_fmt), ##__VA_ARGS__)
1.29 benno 282: #define WARNX(_fmt, ...) \
1.33 deraadt 283: rsync_warnx( (_fmt), ##__VA_ARGS__)
1.29 benno 284: #define WARN(_fmt, ...) \
1.33 deraadt 285: rsync_warn(0, (_fmt), ##__VA_ARGS__)
1.29 benno 286: #define WARN1(_fmt, ...) \
1.33 deraadt 287: rsync_warn(1, (_fmt), ##__VA_ARGS__)
1.29 benno 288: #define WARN2(_fmt, ...) \
1.33 deraadt 289: rsync_warn(2, (_fmt), ##__VA_ARGS__)
1.29 benno 290: #define ERR(_fmt, ...) \
1.33 deraadt 291: rsync_err( (_fmt), ##__VA_ARGS__)
1.29 benno 292: #define ERRX(_fmt, ...) \
1.33 deraadt 293: rsync_errx( (_fmt), ##__VA_ARGS__)
1.29 benno 294:
1.39 claudio 295: void rsync_log(int, const char *, ...)
1.33 deraadt 296: __attribute__((format(printf, 2, 3)));
1.39 claudio 297: void rsync_warnx1(const char *, ...)
1.33 deraadt 298: __attribute__((format(printf, 1, 2)));
1.39 claudio 299: void rsync_warn(int, const char *, ...)
1.33 deraadt 300: __attribute__((format(printf, 2, 3)));
1.39 claudio 301: void rsync_warnx(const char *, ...)
1.33 deraadt 302: __attribute__((format(printf, 1, 2)));
1.39 claudio 303: void rsync_err(const char *, ...)
1.33 deraadt 304: __attribute__((format(printf, 1, 2)));
1.39 claudio 305: void rsync_errx(const char *, ...)
1.33 deraadt 306: __attribute__((format(printf, 1, 2)));
1.39 claudio 307: void rsync_errx1(const char *, ...)
1.33 deraadt 308: __attribute__((format(printf, 1, 2)));
1.1 benno 309:
1.39 claudio 310: int flist_del(struct sess *, int, const struct flist *, size_t);
311: int flist_gen(struct sess *, size_t, char **, struct flist **, size_t *);
312: int flist_gen_local(struct sess *, const char *, struct flist **, size_t *);
313: void flist_free(struct flist *, size_t);
314: int flist_recv(struct sess *, int, struct flist **, size_t *);
315: int flist_send(struct sess *, int, int, const struct flist *, size_t);
316: int flist_gen_dels(struct sess *, const char *, struct flist **, size_t *,
317: const struct flist *, size_t);
318:
1.42 claudio 319: const char *alt_base_mode(int);
320: char **fargs_cmdline(struct sess *, const struct fargs *, size_t *);
1.39 claudio 321:
322: int io_read_buf(struct sess *, int, void *, size_t);
323: int io_read_byte(struct sess *, int, uint8_t *);
324: int io_read_check(int);
325: int io_read_flush(struct sess *, int);
326: int io_read_int(struct sess *, int, int32_t *);
327: int io_read_uint(struct sess *, int, uint32_t *);
328: int io_read_long(struct sess *, int, int64_t *);
329: int io_read_size(struct sess *, int, size_t *);
330: int io_read_ulong(struct sess *, int, uint64_t *);
331: int io_write_buf(struct sess *, int, const void *, size_t);
332: int io_write_byte(struct sess *, int, uint8_t);
333: int io_write_int(struct sess *, int, int32_t);
334: int io_write_uint(struct sess *, int, uint32_t);
335: int io_write_line(struct sess *, int, const char *);
336: int io_write_long(struct sess *, int, int64_t);
337: int io_write_ulong(struct sess *, int, uint64_t);
338:
339: int io_lowbuffer_alloc(struct sess *, void **, size_t *, size_t *, size_t);
340: void io_lowbuffer_int(struct sess *, void *, size_t *, size_t, int32_t);
341: void io_lowbuffer_buf(struct sess *, void *, size_t *, size_t, const void *,
342: size_t);
343:
344: void io_buffer_int(void *, size_t *, size_t, int32_t);
345: void io_buffer_buf(void *, size_t *, size_t, const void *, size_t);
346:
347: void io_unbuffer_int(const void *, size_t *, size_t, int32_t *);
348: int io_unbuffer_size(const void *, size_t *, size_t, size_t *);
349: void io_unbuffer_buf(const void *, size_t *, size_t, void *, size_t);
350:
351: int rsync_receiver(struct sess *, int, int, const char *);
352: int rsync_sender(struct sess *, int, int, size_t, char **);
353: int rsync_client(const struct opts *, int, const struct fargs *);
354: int rsync_connect(const struct opts *, int *, const struct fargs *);
355: int rsync_socket(const struct opts *, int, const struct fargs *);
356: int rsync_server(const struct opts *, size_t, char *[]);
357: int rsync_downloader(struct download *, struct sess *, int *);
358: int rsync_set_metadata(struct sess *, int, int, const struct flist *,
359: const char *);
360: int rsync_set_metadata_at(struct sess *, int, int, const struct flist *,
361: const char *);
362: int rsync_uploader(struct upload *, int *, struct sess *, int *);
363: int rsync_uploader_tail(struct upload *, struct sess *);
364:
365: struct download *download_alloc(struct sess *, int, const struct flist *,
366: size_t, int);
367: void download_free(struct download *);
368: struct upload *upload_alloc(const char *, int, int, size_t,
369: const struct flist *, size_t, mode_t);
370: void upload_free(struct upload *);
1.31 florian 371:
372: struct blktab *blkhash_alloc(void);
373: int blkhash_set(struct blktab *, const struct blkset *);
374: void blkhash_free(struct blktab *);
1.1 benno 375:
1.39 claudio 376: struct blkset *blk_recv(struct sess *, int, const char *);
377: void blk_recv_ack(char [20], const struct blkset *, int32_t);
378: void blk_match(struct sess *, const struct blkset *,
379: const char *, struct blkstat *);
380: int blk_send(struct sess *, int, size_t, const struct blkset *,
381: const char *);
382: int blk_send_ack(struct sess *, int, struct blkset *);
383:
384: uint32_t hash_fast(const void *, size_t);
385: void hash_slow(const void *, size_t, unsigned char *,
386: const struct sess *);
387: void hash_file(const void *, size_t, unsigned char *,
388: const struct sess *);
1.42 claudio 389:
390: void copy_file(int, const char *, const struct flist *);
1.39 claudio 391:
392: int mkpath(char *);
393:
394: int mkstempat(int, char *);
395: char *mkstemplinkat(char*, int, char *);
396: char *mkstempfifoat(int, char *);
397: char *mkstempnodat(int, char *, mode_t, dev_t);
398: char *mkstempsock(const char *, char *);
399: int mktemplate(char **, const char *, int);
1.40 claudio 400:
401: int parse_rule(char *line, enum rule_type);
1.41 claudio 402: void parse_file(const char *, enum rule_type);
1.40 claudio 403: void send_rules(struct sess *, int);
404: void recv_rules(struct sess *, int);
405: int rules_match(const char *, int);
406:
407: int rmatch(const char *, const char *, int);
1.39 claudio 408:
409: char *symlink_read(const char *);
410: char *symlinkat_read(int, const char *);
411:
412: int sess_stats_send(struct sess *, int);
413: int sess_stats_recv(struct sess *, int);
414:
415: int idents_add(int, struct ident **, size_t *, int32_t);
416: void idents_assign_gid(struct sess *, struct flist *, size_t,
417: const struct ident *, size_t);
418: void idents_assign_uid(struct sess *, struct flist *, size_t,
419: const struct ident *, size_t);
420: void idents_free(struct ident *, size_t);
421: int idents_recv(struct sess *, int, struct ident **, size_t *);
422: void idents_remap(struct sess *, int, struct ident *, size_t);
423: int idents_send(struct sess *, int, const struct ident *, size_t);
1.1 benno 424:
425: #endif /*!EXTERN_H*/
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