1 /*-
2  * SPDX-License-Identifier: BSD-3-Clause
56  * is modified by the -n and -u flags. The user is informed when a specific
57  * file arg does not generate any selected files. -n keeps expanding the file
58  * tree arg until one of its files is selected, then skips to the next file
59  * arg. when the user does not supply the file trees as command line args to
77  *	options are based on the selection of pax options by the user
79  *	also attempt to reset directory access times when -t (tflag) is set.
81  *	0 if there is at least one valid file arg to process, -1 otherwise
89 	 * use FTS_NOCHDIR, as the user may have to open multiple archives and  in ftree_start()
91 	 * volume in a place where the user did not expect to.  in ftree_start()
96 	 * optional user flags that effect file traversal  in ftree_start()
97 	 * -H command line symlink follow only (half follow)  in ftree_start()
98 	 * -L follow symlinks (logical)  in ftree_start()
99 	 * -P do not follow symlinks (physical). This is the default.  in ftree_start()
100 	 * -X do not cross over mount points  in ftree_start()
101 	 * -t preserve access times on files read.  in ftree_start()
102 	 * -n select only the first member of a file tree when a match is found  in ftree_start()
103 	 * -d do not extract subtrees rooted at a directory arg.  in ftree_start()
116 		return(-1);  in ftree_start()
120 		return(-1);  in ftree_start()
122 		return(-1);  in ftree_start()
131  *	0 if added to the linked list, -1 if failed
145 		return(-1);  in ftree_add()
151 	 * trailing / the user may pass us. (watch out for / by itself).  in ftree_add()
155 		return(-1);  in ftree_add()
158 	if (((len = strlen(str) - 1) > 0) && (str[len] == '/'))  in ftree_add()
160 	ft->fname = str;  in ftree_add()
161 	ft->refcnt = 0;  in ftree_add()
162 	ft->chflg = chflg;  in ftree_add()
163 	ft->fow = NULL;  in ftree_add()
168 	fttail->fow = ft;  in ftree_add()
175  *	this entry has been selected by pax. bump up reference count and handle
176  *	-n and -d processing.
188 		ftcur->refcnt = 1;  in ftree_sel()
191 	 * if -n we are done with this arg, force a skip to the next arg when  in ftree_sel()
193 	 * if -d we tell fts only to match the directory (if the arg is a dir)  in ftree_sel()
199 	if (!dflag || (arcn->type != PAX_DIR))  in ftree_sel()
208  *	this entry has not been selected by pax.
221  *	have a selected member (reference count still 0)
240 	for (ft = fthead; ft != NULL; ft = ft->fow) {  in ftree_chk()
241 		if ((ft->refcnt > 0) || ft->chflg)  in ftree_chk()
244 			paxwarn(1,"WARNING! These file names were not selected:");  in ftree_chk()
247 		(void)fprintf(stderr, "%s\n", ft->fname);  in ftree_chk()
254  *	list or read from stdin when the user did not them as args to pax. Each
257  *	0 when the next arg is ready to go, -1 if out of file args (or EOF on
281 			 * the user didn't supply any args, get the file trees  in ftree_arg()
285 				return(-1);  in ftree_arg()
290 			 * the user supplied the file args as arguments to pax  in ftree_arg()
294 			else if ((ftcur = ftcur->fow) == NULL)  in ftree_arg()
295 				return(-1);  in ftree_arg()
296 			if (ftcur->chflg) {  in ftree_arg()
301 					return(-1);  in ftree_arg()
303 				if (chdir(ftcur->fname) < 0) {  in ftree_arg()
305 					    ftcur->fname);  in ftree_arg()
306 					return(-1);  in ftree_arg()
310 				farray[0] = ftcur->fname;  in ftree_arg()
319 		 * files (the -n and -d flags need this). If the open is  in ftree_arg()
332  *	0 when contents of arcn have been set with the next file, -1 when done.
343 	 * ftree_sel() might have set the ftree_skip flag if the user has the  in next_file()
344 	 * -n option and a file was selected from this file arg tree. (-n says  in next_file()
354 			return(-1);  in next_file()
367 				return(-1);  in next_file()
374 		switch(ftent->fts_info) {  in next_file()
386 			 * already saw this directory. If the user wants file  in next_file()
390 			 * remember to force the time (this is -t on a read  in next_file()
393 			if (!tflag || (get_atdir(ftent->fts_statp->st_dev,  in next_file()
394 			    ftent->fts_statp->st_ino, &mtime, &atime) < 0))  in next_file()
396 			set_ftime(ftent->fts_path, mtime, atime, 1);  in next_file()
402 			paxwarn(1,"File system cycle found at %s",ftent->fts_path);  in next_file()
405 			syswarn(1, ftent->fts_errno,  in next_file()
406 			    "Unable to read directory %s", ftent->fts_path);  in next_file()
409 			syswarn(1, ftent->fts_errno,  in next_file()
414 			syswarn(1, ftent->fts_errno,  in next_file()
415 			    "Unable to access %s", ftent->fts_path);  in next_file()
423 		arcn->skip = 0;  in next_file()
424 		arcn->pad = 0;  in next_file()
425 		arcn->ln_nlen = 0;  in next_file()
426 		arcn->ln_name[0] = '\0';  in next_file()
427 		arcn->sb = *(ftent->fts_statp);  in next_file()
433 		 * we may read when the -t flag is specified. files are reset  in next_file()
439 		switch(S_IFMT & arcn->sb.st_mode) {  in next_file()
441 			arcn->type = PAX_DIR;  in next_file()
444 			add_atdir(ftent->fts_path, arcn->sb.st_dev,  in next_file()
445 			    arcn->sb.st_ino, arcn->sb.st_mtime,  in next_file()
446 			    arcn->sb.st_atime);  in next_file()
449 			arcn->type = PAX_CHR;  in next_file()
452 			arcn->type = PAX_BLK;  in next_file()
461 			arcn->type = PAX_REG;  in next_file()
462 			arcn->skip = arcn->sb.st_size;  in next_file()
465 			arcn->type = PAX_SLK;  in next_file()
469 			if ((cnt = readlink(ftent->fts_path, arcn->ln_name,  in next_file()
470 			    PAXPATHLEN - 1)) < 0) {  in next_file()
472 				    ftent->fts_path);  in next_file()
479 			arcn->ln_name[cnt] = '\0';  in next_file()
480 			arcn->ln_nlen = cnt;  in next_file()
488 			arcn->type = PAX_SCK;  in next_file()
491 			arcn->type = PAX_FIF;  in next_file()
500 	arcn->nlen = l_strncpy(arcn->name, ftent->fts_path, sizeof(arcn->name) - 1);  in next_file()
501 	arcn->name[arcn->nlen] = '\0';  in next_file()
502 	arcn->org_name = ftent->fts_path;  in next_file()