1 /* $OpenBSD: ftree.c,v 1.8 1997/09/01 18:29:49 deraadt Exp $ */
2 /* $NetBSD: ftree.c,v 1.4 1995/03/21 09:07:21 cgd Exp $ */
5 * Copyright (c) 1992 Keith Muller.
6 * Copyright (c) 1992, 1993
7 * The Regents of the University of California. All rights reserved.
9 * This code is derived from software contributed to Berkeley by
10 * Keith Muller of the University of California, San Diego.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. All advertising materials mentioning features or use of this software
21 * must display the following acknowledgement:
22 * This product includes software developed by the University of
23 * California, Berkeley and its contributors.
24 * 4. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
43 static char sccsid
[] = "@(#)ftree.c 8.2 (Berkeley) 4/18/94";
45 static char rcsid
[] __attribute__((__unused__
)) = "$OpenBSD: ftree.c,v 1.8 1997/09/01 18:29:49 deraadt Exp $";
49 #include <sys/types.h>
52 #include <sys/param.h>
64 * routines to interface with the fts library function.
66 * file args supplied to pax are stored on a single linked list (of type FTREE)
67 * and given to fts to be processed one at a time. pax "selects" files from
68 * the expansion of each arg into the corresponding file tree (if the arg is a
69 * directory, otherwise the node itself is just passed to pax). The selection
70 * is modified by the -n and -u flags. The user is informed when a specific
71 * file arg does not generate any selected files. -n keeps expanding the file
72 * tree arg until one of its files is selected, then skips to the next file
73 * arg. when the user does not supply the file trees as command line args to
74 * pax, they are read from stdin
77 static FTS
*ftsp
= NULL
; /* curent FTS handle */
78 static int ftsopts
; /* options to be used on fts_open */
79 static char *farray
[2]; /* array for passing each arg to fts */
80 static FTREE
*fthead
= NULL
; /* head of linked list of file args */
81 static FTREE
*fttail
= NULL
; /* tail of linked list of file args */
82 static FTREE
*ftcur
= NULL
; /* current file arg being processed */
83 static FTSENT
*ftent
= NULL
; /* current file tree entry */
84 static int ftree_skip
; /* when set skip to next file arg */
86 static int ftree_arg
__P((void));
90 * initialize the options passed to fts_open() during this run of pax
91 * options are based on the selection of pax options by the user
92 * fts_start() also calls fts_arg() to open the first valid file arg. We
93 * also attempt to reset directory access times when -t (tflag) is set.
95 * 0 if there is at least one valid file arg to process, -1 otherwise
107 * set up the operation mode of fts, open the first file arg. We must
108 * use FTS_NOCHDIR, as the user may have to open multiple archives and
109 * if fts did a chdir off into the boondocks, we may create an archive
110 * volume in an place where the user did not expect to.
112 ftsopts
= FTS_NOCHDIR
;
115 * optional user flags that effect file traversal
116 * -H command line symlink follow only (half follow)
117 * -L follow sylinks (logical)
118 * -P do not follow sylinks (physical). This is the default.
119 * -X do not cross over mount points
120 * -t preserve access times on files read.
121 * -n select only the first member of a file tree when a match is found
122 * -d do not extract subtrees rooted at a directory arg.
125 ftsopts
|= FTS_LOGICAL
;
127 ftsopts
|= FTS_PHYSICAL
;
130 paxwarn(0, "The -H flag is not supported on this version");
132 ftsopts
|= FTS_COMFOLLOW
;
137 if ((fthead
== NULL
) && ((farray
[0] = malloc(PAXPATHLEN
+2)) == NULL
)) {
138 paxwarn(1, "Unable to allocate memory for file name buffer");
144 if (tflag
&& (atdir_start() < 0))
151 * add the arg to the linked list of files to process. Each will be
152 * processed by fts one at a time
154 * 0 if added to the linked list, -1 if failed
159 ftree_add(register char *str
, int chflg
)
162 ftree_add(str
, chflg
)
171 * simple check for bad args
173 if ((str
== NULL
) || (*str
== '\0')) {
174 paxwarn(0, "Invalid file name arguement");
179 * allocate FTREE node and add to the end of the linked list (args are
180 * processed in the same order they were passed to pax). Get rid of any
181 * trailing / the user may pass us. (watch out for / by itself).
183 if ((ft
= (FTREE
*)malloc(sizeof(FTREE
))) == NULL
) {
184 paxwarn(0, "Unable to allocate memory for filename");
188 if (((len
= strlen(str
) - 1) > 0) && (str
[len
] == '/'))
194 if (fthead
== NULL
) {
195 fttail
= fthead
= ft
;
205 * this entry has been selected by pax. bump up reference count and handle
206 * -n and -d processing.
211 ftree_sel(register ARCHD
*arcn
)
215 register ARCHD
*arcn
;
219 * set reference bit for this pattern. This linked list is only used
220 * when file trees are supplied pax as args. The list is not used when
221 * the trees are read from stdin.
227 * if -n we are done with this arg, force a skip to the next arg when
228 * pax asks for the next file in next_file().
229 * if -d we tell fts only to match the directory (if the arg is a dir)
230 * and not the entire file tree rooted at that point.
235 if (!dflag
|| (arcn
->type
!= PAX_DIR
))
239 (void)fts_set(ftsp
, ftent
, FTS_SKIP
);
244 * called at end on pax execution. Prints all those file args that did not
245 * have a selected member (reference count still 0)
257 register int wban
= 0;
260 * make sure all dir access times were reset.
266 * walk down list and check reference count. Print out those members
267 * that never had a match
269 for (ft
= fthead
; ft
!= NULL
; ft
= ft
->fow
) {
270 if ((ft
->refcnt
> 0) || ft
->chflg
)
273 paxwarn(1,"WARNING! These file names were not selected:");
276 (void)fprintf(stderr
, "%s\n", ft
->fname
);
282 * Get the next file arg for fts to process. Can be from either the linked
283 * list or read from stdin when the user did not them as args to pax. Each
284 * arg is processed until the first successful fts_open().
286 * 0 when the next arg is ready to go, -1 if out of file args (or EOF on
301 * close off the current file tree
304 (void)fts_close(ftsp
);
309 * keep looping until we get a valid file tree to process. Stop when we
310 * reach the end of the list (or get an eof on stdin)
313 if (fthead
== NULL
) {
315 * the user didn't supply any args, get the file trees
316 * to process from stdin;
318 if (fgets(farray
[0], PAXPATHLEN
+1, stdin
) == NULL
)
320 if ((pt
= strchr(farray
[0], '\n')) != NULL
)
324 * the user supplied the file args as arguements to pax
328 else if ((ftcur
= ftcur
->fow
) == NULL
)
331 /* First fchdir() back... */
332 if (fchdir(cwdfd
) < 0) {
334 "Can't fchdir to starting directory");
337 if (chdir(ftcur
->fname
) < 0) {
338 syswarn(1, errno
, "Can't chdir to %s",
344 farray
[0] = ftcur
->fname
;
348 * watch it, fts wants the file arg stored in a array of char
349 * ptrs, with the last one a null. we use a two element array
350 * and set farray[0] to point at the buffer with the file name
351 * in it. We cannnot pass all the file args to fts at one shot
352 * as we need to keep a handle on which file arg generates what
353 * files (the -n and -d flags need this). If the open is
354 * successful, return a 0.
356 if ((ftsp
= fts_open(farray
, ftsopts
, NULL
)) != NULL
)
364 * supplies the next file to process in the supplied archd structure.
366 * 0 when contents of arcn have been set with the next file, -1 when done.
371 next_file(register ARCHD
*arcn
)
375 register ARCHD
*arcn
;
383 * ftree_sel() might have set the ftree_skip flag if the user has the
384 * -n option and a file was selected from this file arg tree. (-n says
385 * only one member is matched for each pattern) ftree_skip being 1
386 * forces us to go to the next arg now.
390 * clear and go to next arg
398 * loop until we get a valid file to process
401 if ((ftent
= fts_read(ftsp
)) == NULL
) {
403 * out of files in this tree, go to next arg, if none
412 * handle each type of fts_read() flag
414 switch(ftent
->fts_info
) {
426 * already saw this directory. If the user wants file
427 * access times reset, we use this to restore the
428 * access time for this directory since this is the
429 * last time we will see it in this file subtree
430 * remember to force the time (this is -t on a read
431 * directory, not a created directory).
434 if (!tflag
|| (get_atdir(ftent
->fts_statb
.st_dev
,
435 ftent
->fts_statb
.st_ino
, &mtime
, &atime
) < 0))
437 if (!tflag
|| (get_atdir(ftent
->fts_statp
->st_dev
,
438 ftent
->fts_statp
->st_ino
, &mtime
, &atime
) < 0))
441 set_ftime(ftent
->fts_path
, mtime
, atime
, 1);
445 * fts claims a file system cycle
447 paxwarn(1,"File system cycle found at %s",ftent
->fts_path
);
453 syswarn(1, ftent
->fts_errno
,
455 "Unable to read directory %s", ftent
->fts_path
);
461 syswarn(1, ftent
->fts_errno
,
463 "File system traversal error");
470 syswarn(1, ftent
->fts_errno
,
472 "Unable to access %s", ftent
->fts_path
);
477 * ok got a file tree node to process. copy info into arcn
478 * structure (initialize as required)
483 arcn
->ln_name
[0] = '\0';
485 arcn
->sb
= ftent
->fts_statb
;
487 arcn
->sb
= *(ftent
->fts_statp
);
491 * file type based set up and copy into the arcn struct
493 * we try to reset the access time on all files and directories
494 * we may read when the -t flag is specified. files are reset
495 * when we close them after copying. we reset the directories
496 * when we are done with their file tree (we also clean up at
497 * end in case we cut short a file tree traversal). However
498 * there is no way to reset access times on symlinks.
500 switch(S_IFMT
& arcn
->sb
.st_mode
) {
502 arcn
->type
= PAX_DIR
;
505 add_atdir(ftent
->fts_path
, arcn
->sb
.st_dev
,
506 arcn
->sb
.st_ino
, arcn
->sb
.st_mtime
,
510 arcn
->type
= PAX_CHR
;
513 arcn
->type
= PAX_BLK
;
517 * only regular files with have data to store on the
518 * archive. all others will store a zero length skip.
519 * the skip field is used by pax for actual data it has
520 * to read (or skip over).
522 arcn
->type
= PAX_REG
;
523 arcn
->skip
= arcn
->sb
.st_size
;
526 arcn
->type
= PAX_SLK
;
528 * have to read the symlink path from the file
530 if ((cnt
= readlink(ftent
->fts_path
, arcn
->ln_name
,
532 syswarn(1, errno
, "Unable to read symlink %s",
537 * set link name length, watch out readlink does not
538 * allways null terminate the link path
540 arcn
->ln_name
[cnt
] = '\0';
545 * under BSD storing a socket is senseless but we will
546 * let the format specific write function make the
547 * decision of what to do with it.
549 arcn
->type
= PAX_SCK
;
552 arcn
->type
= PAX_FIF
;
559 * copy file name, set file name length
561 arcn
->nlen
= l_strncpy(arcn
->name
, ftent
->fts_path
, sizeof(arcn
->name
) - 1);
562 arcn
->name
[arcn
->nlen
] = '\0';
563 arcn
->org_name
= ftent
->fts_path
;