Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	bin/pax/ftree.c	Lines:	88	165	53.3 %
Date:	2017-11-13	Branches:	56	131	42.7 %


/*	$OpenBSD: ftree.c,v 1.41 2017/09/16 07:42:34 otto Exp $	*/
/*	$NetBSD: ftree.c,v 1.4 1995/03/21 09:07:21 cgd Exp $	*/

/*-
 * Copyright (c) 1992 Keith Muller.
 * Copyright (c) 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Keith Muller of the University of California, San Diego.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <fts.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "pax.h"
#include "extern.h"

/*
 * Data structure used to store the file args to be handed to fts().
 * It keeps track of which args generated a "selected" member.
 */
typedef struct ftree {
	char		*fname;		/* file tree name */
	int		refcnt;		/* has tree had a selected file? */
	int		newercnt;	/* skipped due to -u/-D */
	int		chflg;		/* change directory flag */
	struct ftree	*fow;		/* pointer to next entry on list */
} FTREE;


/*
 * routines to interface with the fts library function.
 *
 * file args supplied to pax are stored on a single linked list (of type FTREE)
 * and given to fts to be processed one at a time. pax "selects" files from
 * the expansion of each arg into the corresponding file tree (if the arg is a
 * directory, otherwise the node itself is just passed to pax). The selection
 * is modified by the -n and -u flags. The user is informed when a specific
 * file arg does not generate any selected files. -n keeps expanding the file
 * tree arg until one of its files is selected, then skips to the next file
 * arg. when the user does not supply the file trees as command line args to
 * pax, they are read from stdin
 */

static FTS *ftsp = NULL;		/* current FTS handle */
static int ftsopts;			/* options to be used on fts_open */
static char *farray[2];			/* array for passing each arg to fts */
static FTREE *fthead = NULL;		/* head of linked list of file args */
static FTREE *fttail = NULL;		/* tail of linked list of file args */
static FTREE *ftcur = NULL;		/* current file arg being processed */
static FTSENT *ftent = NULL;		/* current file tree entry */
static int ftree_skip;			/* when set skip to next file arg */

static int ftree_arg(void);
static char *getpathname(char *, int);

/*
 * ftree_start()
 *	initialize the options passed to fts_open() during this run of pax
 *	options are based on the selection of pax options by the user
 *	fts_start() also calls fts_arg() to open the first valid file arg. We
 *	also attempt to reset directory access times when -t (tflag) is set.
 * Return:
 *	0 if there is at least one valid file arg to process, -1 otherwise
 */

int
ftree_start(void)
{
	/*
	 * set up the operation mode of fts, open the first file arg. We must
	 * use FTS_NOCHDIR, as the user may have to open multiple archives and
	 * if fts did a chdir off into the boondocks, we may create an archive
	 * volume in an place where the user did not expect to.
	 */
	ftsopts = FTS_NOCHDIR;

	/*
	 * optional user flags that effect file traversal
	 * -H command line symlink follow only (half follow)
	 * -L follow sylinks (logical)
	 * -P do not follow sylinks (physical). This is the default.
	 * -X do not cross over mount points
	 * -t preserve access times on files read.
	 * -n select only the first member of a file tree when a match is found
	 * -d do not extract subtrees rooted at a directory arg.
	 */
	if (Lflag)
		ftsopts |= FTS_LOGICAL;
	else
		ftsopts |= FTS_PHYSICAL;
	if (Hflag)
		ftsopts |= FTS_COMFOLLOW;
	if (Xflag)
		ftsopts |= FTS_XDEV;

	if ((fthead == NULL) && ((farray[0] = malloc(PAXPATHLEN+2)) == NULL)) {
		paxwarn(1, "Unable to allocate memory for file name buffer");
		return(-1);
	}

	if (ftree_arg() < 0)
		return(-1);
	if (tflag && (atdir_start() < 0))
		return(-1);
	return(0);
}

/*
 * ftree_add()
 *	add the arg to the linked list of files to process. Each will be
 *	processed by fts one at a time
 * Return:
 *	0 if added to the linked list, -1 if failed
 */

int
ftree_add(char *str, int chflg)
{
	FTREE *ft;
	int len;

	/*
	 * simple check for bad args
	 */
	if ((str == NULL) || (*str == '\0')) {
		paxwarn(0, "Invalid file name argument");
		return(-1);
	}

	/*
	 * allocate FTREE node and add to the end of the linked list (args are
	 * processed in the same order they were passed to pax). Get rid of any
	 * trailing / the user may pass us. (watch out for / by itself).
	 */
	if ((ft = malloc(sizeof(FTREE))) == NULL) {
		paxwarn(0, "Unable to allocate memory for filename");
		return(-1);
	}

	if (((len = strlen(str) - 1) > 0) && (str[len] == '/'))
		str[len] = '\0';
	ft->fname = str;
	ft->refcnt = 0;
	ft->newercnt = 0;
	ft->chflg = chflg;
	ft->fow = NULL;
	if (fthead == NULL) {
		fttail = fthead = ft;
		return(0);
	}
	fttail->fow = ft;
	fttail = ft;
	return(0);
}

/*
 * ftree_sel()
 *	this entry has been selected by pax. bump up reference count and handle
 *	-n and -d processing.
 */

void
ftree_sel(ARCHD *arcn)
{
	/*
	 * set reference bit for this pattern. This linked list is only used
	 * when file trees are supplied pax as args. The list is not used when
	 * the trees are read from stdin.
	 */
	if (ftcur != NULL)
		ftcur->refcnt = 1;

	/*
	 * if -n we are done with this arg, force a skip to the next arg when
	 * pax asks for the next file in next_file().
	 * if -d we tell fts only to match the directory (if the arg is a dir)
	 * and not the entire file tree rooted at that point.
	 */
	if (nflag)
		ftree_skip = 1;

	if (!dflag || (arcn->type != PAX_DIR))
		return;

	if (ftent != NULL)
		(void)fts_set(ftsp, ftent, FTS_SKIP);
}

/*
 * ftree_skipped_newer()
 *	file has been skipped because a newer file exists and -u/-D given
 */

void
ftree_skipped_newer(ARCHD *arcn)
{
	/* skipped due to -u/-D, mark accordingly */
	if (ftcur != NULL)
		ftcur->newercnt = 1;
}

/*
 * ftree_chk()
 *	called at end on pax execution. Prints all those file args that did not
 *	have a selected member (reference count still 0)
 */

void
ftree_chk(void)
{
	FTREE *ft;
	int wban = 0;

	/*
	 * make sure all dir access times were reset.
	 */
	if (tflag)
		atdir_end();

	/*
	 * walk down list and check reference count. Print out those members
	 * that never had a match
	 */
	for (ft = fthead; ft != NULL; ft = ft->fow) {
		if ((ft->refcnt > 0) || ft->newercnt > 0 || ft->chflg)
			continue;
		if (wban == 0) {
			paxwarn(1,"WARNING! These file names were not selected:");
			++wban;
		}
		(void)fprintf(stderr, "%s\n", ft->fname);
	}
}

/*
 * ftree_arg()
 *	Get the next file arg for fts to process. Can be from either the linked
 *	list or read from stdin when the user did not them as args to pax. Each
 *	arg is processed until the first successful fts_open().
 * Return:
 *	0 when the next arg is ready to go, -1 if out of file args (or EOF on
 *	stdin).
 */

static int
ftree_arg(void)
{

	/*
	 * close off the current file tree
	 */
	if (ftsp != NULL) {
		(void)fts_close(ftsp);
		ftsp = NULL;
	}

	/*
	 * keep looping until we get a valid file tree to process. Stop when we
	 * reach the end of the list (or get an eof on stdin)
	 */
	for (;;) {
		if (fthead == NULL) {
			/*
			 * the user didn't supply any args, get the file trees
			 * to process from stdin;
			 */
			if (getpathname(farray[0], PAXPATHLEN+1) == NULL)
				return(-1);
		} else {
			/*
			 * the user supplied the file args as arguments to pax
			 */
			if (ftcur == NULL)
				ftcur = fthead;
			else if ((ftcur = ftcur->fow) == NULL)
				return(-1);
			if (ftcur->chflg) {
				/* First fchdir() back... */
				if (fchdir(cwdfd) < 0) {
					syswarn(1, errno,
					  "Can't fchdir to starting directory");
					return(-1);
				}
				if (chdir(ftcur->fname) < 0) {
					syswarn(1, errno, "Can't chdir to %s",
					    ftcur->fname);
					return(-1);
				}
				continue;
			} else
				farray[0] = ftcur->fname;
		}

		/*
		 * watch it, fts wants the file arg stored in a array of char
		 * ptrs, with the last one a null. we use a two element array
		 * and set farray[0] to point at the buffer with the file name
		 * in it. We cannot pass all the file args to fts at one shot
		 * as we need to keep a handle on which file arg generates what
		 * files (the -n and -d flags need this). If the open is
		 * successful, return a 0.
		 */
		if ((ftsp = fts_open(farray, ftsopts, NULL)) != NULL)
			break;
	}
	return(0);
}

/*
 * next_file()
 *	supplies the next file to process in the supplied archd structure.
 * Return:
 *	0 when contents of arcn have been set with the next file, -1 when done.
 */

int
next_file(ARCHD *arcn)
{
	int cnt;

	/*
	 * ftree_sel() might have set the ftree_skip flag if the user has the
	 * -n option and a file was selected from this file arg tree. (-n says
	 * only one member is matched for each pattern) ftree_skip being 1
	 * forces us to go to the next arg now.
	 */
	if (ftree_skip) {
		/*
		 * clear and go to next arg
		 */
		ftree_skip = 0;
		if (ftree_arg() < 0)
			return(-1);
	}

	/*
	 * loop until we get a valid file to process
	 */
	for (;;) {
		if ((ftent = fts_read(ftsp)) == NULL) {
			if (errno)
				syswarn(1, errno, "next_file");
			/*
			 * out of files in this tree, go to next arg, if none
			 * we are done
			 */
			if (ftree_arg() < 0)
				return(-1);
			continue;
		}

		/*
		 * handle each type of fts_read() flag
		 */
		switch (ftent->fts_info) {
		case FTS_D:
		case FTS_DEFAULT:
		case FTS_F:
		case FTS_SL:
		case FTS_SLNONE:
			/*
			 * these are all ok
			 */
			break;
		case FTS_DP:
			/*
			 * already saw this directory. If the user wants file
			 * access times reset, we use this to restore the
			 * access time for this directory since this is the
			 * last time we will see it in this file subtree
			 * remember to force the time (this is -t on a read
			 * directory, not a created directory).
			 */
			if (!tflag)
				continue;
			do_atdir(ftent->fts_path, ftent->fts_statp->st_dev,
			    ftent->fts_statp->st_ino);
			continue;
		case FTS_DC:
			/*
			 * fts claims a file system cycle
			 */
			paxwarn(1,"File system cycle found at %s",ftent->fts_path);
			continue;
		case FTS_DNR:
			syswarn(1, ftent->fts_errno,
			    "Unable to read directory %s", ftent->fts_path);
			continue;
		case FTS_ERR:
			syswarn(1, ftent->fts_errno,
			    "File system traversal error");
			continue;
		case FTS_NS:
		case FTS_NSOK:
			syswarn(1, ftent->fts_errno,
			    "Unable to access %s", ftent->fts_path);
			continue;
		}

		/*
		 * ok got a file tree node to process. copy info into arcn
		 * structure (initialize as required)
		 */
		arcn->skip = 0;
		arcn->pad = 0;
		arcn->ln_nlen = 0;
		arcn->ln_name[0] = '\0';
		memcpy(&arcn->sb, ftent->fts_statp, sizeof(arcn->sb));

		/*
		 * file type based set up and copy into the arcn struct
		 * SIDE NOTE:
		 * we try to reset the access time on all files and directories
		 * we may read when the -t flag is specified. files are reset
		 * when we close them after copying. we reset the directories
		 * when we are done with their file tree (we also clean up at
		 * end in case we cut short a file tree traversal). However
		 * there is no way to reset access times on symlinks.
		 */
		switch (S_IFMT & arcn->sb.st_mode) {
		case S_IFDIR:
			arcn->type = PAX_DIR;
			if (!tflag)
				break;
			add_atdir(ftent->fts_path, arcn->sb.st_dev,
			    arcn->sb.st_ino, &arcn->sb.st_mtim,
			    &arcn->sb.st_atim);
			break;
		case S_IFCHR:
			arcn->type = PAX_CHR;
			break;
		case S_IFBLK:
			arcn->type = PAX_BLK;
			break;
		case S_IFREG:
			/*
			 * only regular files with have data to store on the
			 * archive. all others will store a zero length skip.
			 * the skip field is used by pax for actual data it has
			 * to read (or skip over).
			 */
			arcn->type = PAX_REG;
			arcn->skip = arcn->sb.st_size;
			break;
		case S_IFLNK:
			arcn->type = PAX_SLK;
			/*
			 * have to read the symlink path from the file
			 */
			if ((cnt = readlink(ftent->fts_path, arcn->ln_name,
			    PAXPATHLEN)) < 0) {
				syswarn(1, errno, "Unable to read symlink %s",
				    ftent->fts_path);
				continue;
			}
			/*
			 * set link name length, watch out readlink does not
			 * NUL terminate the link path
			 */
			arcn->ln_name[cnt] = '\0';
			arcn->ln_nlen = cnt;
			break;
		case S_IFSOCK:
			/*
			 * under BSD storing a socket is senseless but we will
			 * let the format specific write function make the
			 * decision of what to do with it.
			 */
			arcn->type = PAX_SCK;
			break;
		case S_IFIFO:
			arcn->type = PAX_FIF;
			break;
		}
		break;
	}

	/*
	 * copy file name, set file name length
	 */
	arcn->nlen = strlcpy(arcn->name, ftent->fts_path, sizeof(arcn->name));
	if ((size_t)arcn->nlen >= sizeof(arcn->name))
		arcn->nlen = sizeof(arcn->name) - 1; /* XXX truncate? */
	arcn->org_name = ftent->fts_path;
	return(0);
}

/*
 * getpathname()
 *	Reads a pathname from stdin, handling NUL- or newline-termination.
 * Return:
 *	NULL at end of file, otherwise the NUL-terminated buffer.
 */

static char *
getpathname(char *buf, int buflen)
{
	char *bp, *ep;
	int ch, term;

	if (zeroflag) {
		/*
		 * Read a NUL-terminated pathname, being especially
		 * paranoid about proper termination and pathname length.
		 */
		for (bp = buf, ep = buf + buflen; bp < ep; bp++) {
			if ((ch = getchar()) == EOF) {
				if (bp != buf)
					paxwarn(1, "Ignoring unterminated "
					    "pathname at EOF");
				return(NULL);
			}
			if ((*bp = ch) == '\0')
				return(buf);
		}
		/* Too long - skip this path */
		*--bp = '\0';
		term = '\0';
	} else {
		if (fgets(buf, buflen, stdin) == NULL)
			return(NULL);
		if ((bp = strchr(buf, '\n')) != NULL || feof(stdin)) {
			if (bp != NULL)
				*bp = '\0';
			return(buf);
		}
		/* Too long - skip this path */
		term = '\n';
	}
	while ((ch = getchar()) != term && ch != EOF)
		continue;
	paxwarn(1, "Ignoring too-long pathname: %s", buf);
	return(NULL);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: ftree.c,v 1.41 2017/09/16 07:42:34 otto Exp $ */
2			/* $NetBSD: ftree.c,v 1.4 1995/03/21 09:07:21 cgd Exp $ */
3
4			/*-
5			* Copyright (c) 1992 Keith Muller.
6			* Copyright (c) 1992, 1993
7			* The Regents of the University of California. All rights reserved.
8			*
9			* This code is derived from software contributed to Berkeley by
10			* Keith Muller of the University of California, San Diego.
11			*
12			* Redistribution and use in source and binary forms, with or without
13			* modification, are permitted provided that the following conditions
14			* are met:
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. Neither the name of the University nor the names of its contributors
21			* may be used to endorse or promote products derived from this software
22			* without specific prior written permission.
23			*
24			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34			* SUCH DAMAGE.
35			*/
36
37			#include <sys/types.h>
38			#include <sys/stat.h>
39			#include <errno.h>
40			#include <fts.h>
41			#include <stdio.h>
42			#include <stdlib.h>
43			#include <string.h>
44			#include <unistd.h>
45
46			#include "pax.h"
47			#include "extern.h"
48
49			/*
50			* Data structure used to store the file args to be handed to fts().
51			* It keeps track of which args generated a "selected" member.
52			*/
53			typedef struct ftree {
54			char fname; / file tree name */
55			int refcnt; /* has tree had a selected file? */
56			int newercnt; /* skipped due to -u/-D */
57			int chflg; /* change directory flag */
58			struct ftree fow; / pointer to next entry on list */
59			} FTREE;
60
61
62			/*
63			* routines to interface with the fts library function.
64			*
65			* file args supplied to pax are stored on a single linked list (of type FTREE)
66			* and given to fts to be processed one at a time. pax "selects" files from
67			* the expansion of each arg into the corresponding file tree (if the arg is a
68			* directory, otherwise the node itself is just passed to pax). The selection
69			* is modified by the -n and -u flags. The user is informed when a specific
70			* file arg does not generate any selected files. -n keeps expanding the file
71			* tree arg until one of its files is selected, then skips to the next file
72			* arg. when the user does not supply the file trees as command line args to
73			* pax, they are read from stdin
74			*/
75
76			static FTS ftsp = NULL; / current FTS handle */
77			static int ftsopts; /* options to be used on fts_open */
78			static char farray[2]; / array for passing each arg to fts */
79			static FTREE fthead = NULL; / head of linked list of file args */
80			static FTREE fttail = NULL; / tail of linked list of file args */
81			static FTREE ftcur = NULL; / current file arg being processed */
82			static FTSENT ftent = NULL; / current file tree entry */
83			static int ftree_skip; /* when set skip to next file arg */
84
85			static int ftree_arg(void);
86			static char getpathname(char , int);
87
88			/*
89			* ftree_start()
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.
94			* Return:
95			* 0 if there is at least one valid file arg to process, -1 otherwise
96			*/
97
98			int
99			ftree_start(void)
100			{
101			/*
102			* set up the operation mode of fts, open the first file arg. We must
103			* use FTS_NOCHDIR, as the user may have to open multiple archives and
104			* if fts did a chdir off into the boondocks, we may create an archive
105			* volume in an place where the user did not expect to.
106			*/
107		80	ftsopts = FTS_NOCHDIR;
108
109			/*
110			* optional user flags that effect file traversal
111			* -H command line symlink follow only (half follow)
112			* -L follow sylinks (logical)
113			* -P do not follow sylinks (physical). This is the default.
114			* -X do not cross over mount points
115			* -t preserve access times on files read.
116			* -n select only the first member of a file tree when a match is found
117			* -d do not extract subtrees rooted at a directory arg.
118			*/
119		40	if (Lflag)
120			ftsopts \|= FTS_LOGICAL;
121			else
122			ftsopts \|= FTS_PHYSICAL;
123	✗✓	40	if (Hflag)
124			ftsopts \|= FTS_COMFOLLOW;
125	✗✓	40	if (Xflag)
126			ftsopts \|= FTS_XDEV;
127
128	✓✓✗✓	70	if ((fthead == NULL) && ((farray[0] = malloc(PAXPATHLEN+2)) == NULL)) {
129			paxwarn(1, "Unable to allocate memory for file name buffer");
130			return(-1);
131			}
132
133	✓✓	40	if (ftree_arg() < 0)
134		12	return(-1);
135	✗✓✗✗	28	if (tflag && (atdir_start() < 0))
136			return(-1);
137		28	return(0);
138		40	}
139
140			/*
141			* ftree_add()
142			* add the arg to the linked list of files to process. Each will be
143			* processed by fts one at a time
144			* Return:
145			* 0 if added to the linked list, -1 if failed
146			*/
147
148			int
149			ftree_add(char *str, int chflg)
150			{
151			FTREE *ft;
152			int len;
153
154			/*
155			* simple check for bad args
156			*/
157	✓✗✗✓	120	if ((str == NULL) \|\| (*str == '\0')) {
158			paxwarn(0, "Invalid file name argument");
159			return(-1);
160			}
161
162			/*
163			* allocate FTREE node and add to the end of the linked list (args are
164			* processed in the same order they were passed to pax). Get rid of any
165			* trailing / the user may pass us. (watch out for / by itself).
166			*/
167	✗✓	40	if ((ft = malloc(sizeof(FTREE))) == NULL) {
168			paxwarn(0, "Unable to allocate memory for filename");
169			return(-1);
170			}
171
172	✓✓✗✓	74	if (((len = strlen(str) - 1) > 0) && (str[len] == '/'))
173			str[len] = '\0';
174		40	ft->fname = str;
175		40	ft->refcnt = 0;
176		40	ft->newercnt = 0;
177		40	ft->chflg = chflg;
178		40	ft->fow = NULL;
179	✓✓	40	if (fthead == NULL) {
180		10	fttail = fthead = ft;
181		10	return(0);
182			}
183		30	fttail->fow = ft;
184		30	fttail = ft;
185		30	return(0);
186		40	}
187
188			/*
189			* ftree_sel()
190			* this entry has been selected by pax. bump up reference count and handle
191			* -n and -d processing.
192			*/
193
194			void
195			ftree_sel(ARCHD *arcn)
196			{
197			/*
198			* set reference bit for this pattern. This linked list is only used
199			* when file trees are supplied pax as args. The list is not used when
200			* the trees are read from stdin.
201			*/
202	✓✓	226	if (ftcur != NULL)
203		101	ftcur->refcnt = 1;
204
205			/*
206			* if -n we are done with this arg, force a skip to the next arg when
207			* pax asks for the next file in next_file().
208			* if -d we tell fts only to match the directory (if the arg is a dir)
209			* and not the entire file tree rooted at that point.
210			*/
211	✗✓	113	if (nflag)
212			ftree_skip = 1;
213
214	✗✓✗✗	113	if (!dflag \|\| (arcn->type != PAX_DIR))
215			return;
216
217			if (ftent != NULL)
218			(void)fts_set(ftsp, ftent, FTS_SKIP);
219		113	}
220
221			/*
222			* ftree_skipped_newer()
223			* file has been skipped because a newer file exists and -u/-D given
224			*/
225
226			void
227			ftree_skipped_newer(ARCHD *arcn)
228			{
229			/* skipped due to -u/-D, mark accordingly */
230			if (ftcur != NULL)
231			ftcur->newercnt = 1;
232			}
233
234			/*
235			* ftree_chk()
236			* called at end on pax execution. Prints all those file args that did not
237			* have a selected member (reference count still 0)
238			*/
239
240			void
241			ftree_chk(void)
242			{
243			FTREE *ft;
244			int wban = 0;
245
246			/*
247			* make sure all dir access times were reset.
248			*/
249	✗✓	68	if (tflag)
250			atdir_end();
251
252			/*
253			* walk down list and check reference count. Print out those members
254			* that never had a match
255			*/
256	✓✓	148	for (ft = fthead; ft != NULL; ft = ft->fow) {
257	✗✓✗✗ ✗✗	40	if ((ft->refcnt > 0) \|\| ft->newercnt > 0 \|\| ft->chflg)
258			continue;
259			if (wban == 0) {
260			paxwarn(1,"WARNING! These file names were not selected:");
261			++wban;
262			}
263			(void)fprintf(stderr, "%s\n", ft->fname);
264			}
265		34	}
266
267			/*
268			* ftree_arg()
269			* Get the next file arg for fts to process. Can be from either the linked
270			* list or read from stdin when the user did not them as args to pax. Each
271			* arg is processed until the first successful fts_open().
272			* Return:
273			* 0 when the next arg is ready to go, -1 if out of file args (or EOF on
274			* stdin).
275			*/
276
277			static int
278			ftree_arg(void)
279			{
280
281			/*
282			* close off the current file tree
283			*/
284	✓✓	196	if (ftsp != NULL) {
285		58	(void)fts_close(ftsp);
286		58	ftsp = NULL;
287		58	}
288
289			/*
290			* keep looping until we get a valid file tree to process. Stop when we
291			* reach the end of the list (or get an eof on stdin)
292			*/
293		98	for (;;) {
294	✓✓	98	if (fthead == NULL) {
295			/*
296			* the user didn't supply any args, get the file trees
297			* to process from stdin;
298			*/
299	✓✓	48	if (getpathname(farray[0], PAXPATHLEN+1) == NULL)
300		30	return(-1);
301			} else {
302			/*
303			* the user supplied the file args as arguments to pax
304			*/
305	✓✓	50	if (ftcur == NULL)
306		10	ftcur = fthead;
307	✓✓	40	else if ((ftcur = ftcur->fow) == NULL)
308		10	return(-1);
309	✗✓	40	if (ftcur->chflg) {
310			/* First fchdir() back... */
311			if (fchdir(cwdfd) < 0) {
312			syswarn(1, errno,
313			"Can't fchdir to starting directory");
314			return(-1);
315			}
316			if (chdir(ftcur->fname) < 0) {
317			syswarn(1, errno, "Can't chdir to %s",
318			ftcur->fname);
319			return(-1);
320			}
321			continue;
322			} else
323		40	farray[0] = ftcur->fname;
324			}
325
326			/*
327			* watch it, fts wants the file arg stored in a array of char
328			* ptrs, with the last one a null. we use a two element array
329			* and set farray[0] to point at the buffer with the file name
330			* in it. We cannot pass all the file args to fts at one shot
331			* as we need to keep a handle on which file arg generates what
332			* files (the -n and -d flags need this). If the open is
333			* successful, return a 0.
334			*/
335	✗✓	58	if ((ftsp = fts_open(farray, ftsopts, NULL)) != NULL)
336			break;
337			}
338		58	return(0);
339		98	}
340
341			/*
342			* next_file()
343			* supplies the next file to process in the supplied archd structure.
344			* Return:
345			* 0 when contents of arcn have been set with the next file, -1 when done.
346			*/
347
348			int
349			next_file(ARCHD *arcn)
350			{
351			int cnt;
352
353			/*
354			* ftree_sel() might have set the ftree_skip flag if the user has the
355			* -n option and a file was selected from this file arg tree. (-n says
356			* only one member is matched for each pattern) ftree_skip being 1
357			* forces us to go to the next arg now.
358			*/
359	✗✓	282	if (ftree_skip) {
360			/*
361			* clear and go to next arg
362			*/
363			ftree_skip = 0;
364			if (ftree_arg() < 0)
365			return(-1);
366			}
367
368			/*
369			* loop until we get a valid file to process
370			*/
371		141	for (;;) {
372	✓✓	193	if ((ftent = fts_read(ftsp)) == NULL) {
373	✗✓	58	if (errno)
374			syswarn(1, errno, "next_file");
375			/*
376			* out of files in this tree, go to next arg, if none
377			* we are done
378			*/
379	✓✓	58	if (ftree_arg() < 0)
380		28	return(-1);
381		30	continue;
382			}
383
384			/*
385			* handle each type of fts_read() flag
386			*/
387	✓✗✗✗ ✗✓✓	135	switch (ftent->fts_info) {
388			case FTS_D:
389			case FTS_DEFAULT:
390			case FTS_F:
391			case FTS_SL:
392			case FTS_SLNONE:
393			/*
394			* these are all ok
395			*/
396			break;
397			case FTS_DP:
398			/*
399			* already saw this directory. If the user wants file
400			* access times reset, we use this to restore the
401			* access time for this directory since this is the
402			* last time we will see it in this file subtree
403			* remember to force the time (this is -t on a read
404			* directory, not a created directory).
405			*/
406	✓✗	16	if (!tflag)
407		16	continue;
408			do_atdir(ftent->fts_path, ftent->fts_statp->st_dev,
409			ftent->fts_statp->st_ino);
410			continue;
411			case FTS_DC:
412			/*
413			* fts claims a file system cycle
414			*/
415			paxwarn(1,"File system cycle found at %s",ftent->fts_path);
416			continue;
417			case FTS_DNR:
418			syswarn(1, ftent->fts_errno,
419			"Unable to read directory %s", ftent->fts_path);
420			continue;
421			case FTS_ERR:
422			syswarn(1, ftent->fts_errno,
423			"File system traversal error");
424			continue;
425			case FTS_NS:
426			case FTS_NSOK:
427		12	syswarn(1, ftent->fts_errno,
428		6	"Unable to access %s", ftent->fts_path);
429		6	continue;
430			}
431
432			/*
433			* ok got a file tree node to process. copy info into arcn
434			* structure (initialize as required)
435			*/
436		226	arcn->skip = 0;
437		226	arcn->pad = 0;
438		226	arcn->ln_nlen = 0;
439		226	arcn->ln_name[0] = '\0';
440		226	memcpy(&arcn->sb, ftent->fts_statp, sizeof(arcn->sb));
441
442			/*
443			* file type based set up and copy into the arcn struct
444			* SIDE NOTE:
445			* we try to reset the access time on all files and directories
446			* we may read when the -t flag is specified. files are reset
447			* when we close them after copying. we reset the directories
448			* when we are done with their file tree (we also clean up at
449			* end in case we cut short a file tree traversal). However
450			* there is no way to reset access times on symlinks.
451			*/
452	✓✗✗✓ ✗✗✗✓	226	switch (S_IFMT & arcn->sb.st_mode) {
453			case S_IFDIR:
454		16	arcn->type = PAX_DIR;
455	✗✓	16	if (!tflag)
456			break;
457			add_atdir(ftent->fts_path, arcn->sb.st_dev,
458			arcn->sb.st_ino, &arcn->sb.st_mtim,
459			&arcn->sb.st_atim);
460			break;
461			case S_IFCHR:
462			arcn->type = PAX_CHR;
463			break;
464			case S_IFBLK:
465			arcn->type = PAX_BLK;
466			break;
467			case S_IFREG:
468			/*
469			* only regular files with have data to store on the
470			* archive. all others will store a zero length skip.
471			* the skip field is used by pax for actual data it has
472			* to read (or skip over).
473			*/
474		97	arcn->type = PAX_REG;
475		97	arcn->skip = arcn->sb.st_size;
476		97	break;
477			case S_IFLNK:
478			arcn->type = PAX_SLK;
479			/*
480			* have to read the symlink path from the file
481			*/
482			if ((cnt = readlink(ftent->fts_path, arcn->ln_name,
483			PAXPATHLEN)) < 0) {
484			syswarn(1, errno, "Unable to read symlink %s",
485			ftent->fts_path);
486			continue;
487			}
488			/*
489			* set link name length, watch out readlink does not
490			* NUL terminate the link path
491			*/
492			arcn->ln_name[cnt] = '\0';
493			arcn->ln_nlen = cnt;
494			break;
495			case S_IFSOCK:
496			/*
497			* under BSD storing a socket is senseless but we will
498			* let the format specific write function make the
499			* decision of what to do with it.
500			*/
501			arcn->type = PAX_SCK;
502			break;
503			case S_IFIFO:
504			arcn->type = PAX_FIF;
505			break;
506			}
507			break;
508			}
509
510			/*
511			* copy file name, set file name length
512			*/
513		113	arcn->nlen = strlcpy(arcn->name, ftent->fts_path, sizeof(arcn->name));
514	✗✓	113	if ((size_t)arcn->nlen >= sizeof(arcn->name))
515			arcn->nlen = sizeof(arcn->name) - 1; /* XXX truncate? */
516		113	arcn->org_name = ftent->fts_path;
517		113	return(0);
518		141	}
519
520			/*
521			* getpathname()
522			* Reads a pathname from stdin, handling NUL- or newline-termination.
523			* Return:
524			* NULL at end of file, otherwise the NUL-terminated buffer.
525			*/
526
527			static char *
528			getpathname(char *buf, int buflen)
529			{
530			char bp, ep;
531			int ch, term;
532
533	✗✓	96	if (zeroflag) {
534			/*
535			* Read a NUL-terminated pathname, being especially
536			* paranoid about proper termination and pathname length.
537			*/
538			for (bp = buf, ep = buf + buflen; bp < ep; bp++) {
539			if ((ch = getchar()) == EOF) {
540			if (bp != buf)
541			paxwarn(1, "Ignoring unterminated "
542			"pathname at EOF");
543			return(NULL);
544			}
545			if ((*bp = ch) == '\0')
546			return(buf);
547			}
548			/* Too long - skip this path */
549			*--bp = '\0';
550			term = '\0';
551			} else {
552	✓✓	48	if (fgets(buf, buflen, stdin) == NULL)
553		30	return(NULL);
554	✗✓✗✗ ✗✗✗✗	18	if ((bp = strchr(buf, '\n')) != NULL \|\| feof(stdin)) {
555	✓✗	18	if (bp != NULL)
556		18	*bp = '\0';
557		18	return(buf);
558			}
559			/* Too long - skip this path */
560			term = '\n';
561			}
562			while ((ch = getchar()) != term && ch != EOF)
563			continue;
564			paxwarn(1, "Ignoring too-long pathname: %s", buf);
565			return(NULL);
566		48	}