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📁 ..
📄 Makefile.inc(11.75 KB)
📄 Symbol.map(8.61 KB)
📄 __getosreldate.c(2.34 KB)
📄 __pthread_mutex_init_calloc_cb_stub.c(1.78 KB)
📄 __xuname.c(3.54 KB)
📄 _once_stub.c(2.45 KB)
📄 _pthread_stubs.c(13.83 KB)
📄 _rand48.c(1.37 KB)
📄 _spinlock_stub.c(2.33 KB)
📄 _thread_init.c(1.74 KB)
📄 alarm.3(2.8 KB)
📄 alarm.c(2.1 KB)
📄 arc4random-compat.c(2.35 KB)
📄 arc4random.3(4.78 KB)
📄 arc4random.c(5.87 KB)
📄 arc4random.h(4.11 KB)
📄 arc4random_uniform.c(1.77 KB)
📄 assert.c(2.12 KB)
📄 auxv.3(3.28 KB)
📄 auxv.c(8.11 KB)
📄 basename.3(2.22 KB)
📄 basename.c(1.91 KB)
📄 basename_compat.c(2.18 KB)
📄 cap_rights_get.3(3.53 KB)
📄 cap_sandboxed.3(2.45 KB)
📄 cap_sandboxed.c(1.79 KB)
📄 check_utility_compat.3(2.99 KB)
📄 check_utility_compat.c(2.3 KB)
📄 clock.3(2.59 KB)
📄 clock.c(2.16 KB)
📄 clock_getcpuclockid.3(3.31 KB)
📄 clock_getcpuclockid.c(1.67 KB)
📄 closedir.c(2.38 KB)
📄 confstr.3(3.6 KB)
📄 confstr.c(3.78 KB)
📄 crypt.c(3.13 KB)
📄 ctermid.3(3.03 KB)
📄 ctermid.c(2.21 KB)
📄 daemon.3(3.92 KB)
📄 daemon.c(3.09 KB)
📄 devname-compat11.c(1.79 KB)
📄 devname.3(3.25 KB)
📄 devname.c(2.41 KB)
📄 directory.3(8.7 KB)
📄 dirfd.c(1.62 KB)
📄 dirname.3(2.22 KB)
📄 dirname.c(2.29 KB)
📄 dirname_compat.c(2.05 KB)
📄 disklabel.c(4.86 KB)
📄 dl_iterate_phdr.3(3.27 KB)
📄 dladdr.3(3.92 KB)
📄 dlfcn.c(6.44 KB)
📄 dlinfo.3(7.14 KB)
📄 dllockinit.3(3.9 KB)
📄 dlopen.3(11.35 KB)
📄 drand48.c(605 B)
📄 dup3.3(2.74 KB)
📄 dup3.c(1.96 KB)
📄 elf_utils.c(3.67 KB)
📄 erand48.c(691 B)
📄 err.3(5.79 KB)
📄 err.c(4.35 KB)
📄 errlst.c(8.3 KB)
📄 errno.c(1.45 KB)
📄 eventfd.c(1.79 KB)
📄 exec.3(9.24 KB)
📄 exec.c(7 KB)
📄 exect.c(1.61 KB)
📄 fdevname.c(1.83 KB)
📄 feature_present.3(2.48 KB)
📄 feature_present.c(2.26 KB)
📄 fmtcheck.3(3.27 KB)
📄 fmtcheck.c(6.92 KB)
📄 fmtmsg.3(6.45 KB)
📄 fmtmsg.c(5.86 KB)
📄 fnmatch.3(4.11 KB)
📄 fnmatch.c(8.85 KB)
📄 fpclassify.3(3.11 KB)
📄 fpclassify.c(2.67 KB)
📄 frexp.3(2.76 KB)
📄 frexp.c(1.88 KB)
📄 fstab.c(6.85 KB)
📄 ftok.3(2.71 KB)
📄 ftok.c(1.83 KB)
📄 fts-compat.c(32.07 KB)
📄 fts-compat.h(5.28 KB)
📄 fts-compat11.c(31.65 KB)
📄 fts-compat11.h(3.85 KB)
📄 fts.3(19.27 KB)
📄 fts.c(30.66 KB)
📄 ftw-compat11.c(2.59 KB)
📄 ftw.3(5.7 KB)
📄 ftw.c(2.28 KB)
📄 gen-compat.h(2.35 KB)
📄 gen-private.h(2.64 KB)
📄 getbootfile.3(2.57 KB)
📄 getbootfile.c(2.01 KB)
📄 getbsize.3(3.05 KB)
📄 getbsize.c(3 KB)
📄 getcap.3(14.8 KB)
📄 getcap.c(22.93 KB)
📄 getcontext.3(4.92 KB)
📄 getcwd.3(4.08 KB)
📄 getcwd.c(5.61 KB)
📄 getdiskbyname.3(2.23 KB)
📄 getdomainname.3(2.94 KB)
📄 getdomainname.c(1.98 KB)
📄 getentropy.3(2.05 KB)
📄 getentropy.c(4.09 KB)
📄 getfsent.3(4.54 KB)
📄 getgrent.3(6.7 KB)
📄 getgrent.c(34.33 KB)
📄 getgrouplist.3(2.81 KB)
📄 getgrouplist.c(2.03 KB)
📄 gethostname.3(3.58 KB)
📄 gethostname.c(2.02 KB)
📄 getloadavg.3(2.44 KB)
📄 getloadavg.c(2.39 KB)
📄 getlogin.c(2.65 KB)
📄 getmntinfo-compat11.c(2.61 KB)
📄 getmntinfo.3(3.1 KB)
📄 getmntinfo.c(2.57 KB)
📄 getnetgrent.3(4.02 KB)
📄 getnetgrent.c(24.86 KB)
📄 getosreldate.3(2.48 KB)
📄 getosreldate.c(2.09 KB)
📄 getpagesize.3(2.17 KB)
📄 getpagesize.c(2.46 KB)
📄 getpagesizes.3(2.94 KB)
📄 getpagesizes.c(2.99 KB)
📄 getpass.3(3 KB)
📄 getpeereid.3(3.36 KB)
📄 getpeereid.c(1.95 KB)
📄 getprogname.3(3.1 KB)
📄 getprogname.c(249 B)
📄 getpwent.3(7.67 KB)
📄 getpwent.c(44.7 KB)
📄 getttyent.3(5.75 KB)
📄 getttyent.c(6.7 KB)
📄 getusershell.3(2.86 KB)
📄 getusershell.c(5.74 KB)
📄 getutxent.3(11.32 KB)
📄 getutxent.c(4.89 KB)
📄 getvfsbyname.3(3.44 KB)
📄 getvfsbyname.c(3.1 KB)
📄 glob-compat11.c(25.67 KB)
📄 glob-compat11.h(2.8 KB)
📄 glob.3(10.79 KB)
📄 glob.c(26.49 KB)
📄 initgroups.3(2.62 KB)
📄 initgroups.c(2.33 KB)
📄 isatty.c(1.84 KB)
📄 isgreater.3(2.86 KB)
📄 isinf.c(2.14 KB)
📄 isnan.c(2.36 KB)
📄 jrand48.c(662 B)
📄 lcong48.c(832 B)
📄 ldexp.3(2.47 KB)
📄 ldexp.c(2.89 KB)
📄 libc_dlopen.c(1.88 KB)
📄 lockf.3(7.27 KB)
📄 lockf.c(2.55 KB)
📄 lrand48.c(670 B)
📄 makecontext.3(4.25 KB)
📄 memalign.c(1.63 KB)
📄 modf.3(2.63 KB)
📄 modf.c(2.95 KB)
📄 mrand48.c(709 B)
📄 nftw-compat11.c(2.91 KB)
📄 nftw.c(2.71 KB)
📄 nice.3(2.92 KB)
📄 nice.c(2.14 KB)
📄 nlist.3(2.55 KB)
📄 nlist.c(7.54 KB)
📄 nrand48.c(628 B)
📄 opendir.c(8.52 KB)
📄 pause.3(2.36 KB)
📄 pause.c(2.01 KB)
📄 pmadvise.c(425 B)
📄 popen.3(4.86 KB)
📄 popen.c(6 KB)
📄 posix_spawn.3(14.35 KB)
📄 posix_spawn.c(14.04 KB)
📄 posix_spawn_file_actions_addopen.3(6.28 KB)
📄 posix_spawn_file_actions_init.3(3.78 KB)
📄 posix_spawnattr_getflags.3(3.81 KB)
📄 posix_spawnattr_getpgroup.3(3.45 KB)
📄 posix_spawnattr_getschedparam.3(3.69 KB)
📄 posix_spawnattr_getschedpolicy.3(3.63 KB)
📄 posix_spawnattr_getsigdefault.3(3.65 KB)
📄 posix_spawnattr_getsigmask.3(3.56 KB)
📄 posix_spawnattr_init.3(4.09 KB)
📄 psignal.3(3.18 KB)
📄 psignal.c(2.22 KB)
📄 pututxline.c(7.34 KB)
📄 pw_scan.c(6.3 KB)
📄 pw_scan.h(1.8 KB)
📄 raise.3(2.31 KB)
📄 raise.c(1.96 KB)
📄 rand48.3(4.56 KB)
📄 rand48.h(811 B)
📄 readdir-compat11.c(3.63 KB)
📄 readdir.c(3.91 KB)
📄 readpassphrase.3(4.77 KB)
📄 readpassphrase.c(5.65 KB)
📄 recvmmsg.c(2.83 KB)
📄 rewinddir.c(2.29 KB)
📄 rfork_thread.3(2.7 KB)
📄 scandir-compat11.c(4.89 KB)
📄 scandir.3(3.86 KB)
📄 scandir.c(4.8 KB)
📄 scandir_b.c(1.38 KB)
📄 seed48.c(1 KB)
📄 seekdir.c(2.17 KB)
📄 sem.c(11.4 KB)
📄 sem_destroy.3(2.51 KB)
📄 sem_getvalue.3(2.56 KB)
📄 sem_init.3(2.81 KB)
📄 sem_new.c(9.95 KB)
📄 sem_open.3(5.37 KB)
📄 sem_post.3(2.45 KB)
📄 sem_timedwait.3(5 KB)
📄 sem_wait.3(2.73 KB)
📄 semctl.c(2.67 KB)
📄 sendmmsg.c(2.1 KB)
📄 setdomainname.c(1.97 KB)
📄 sethostname.c(1.96 KB)
📄 setjmp.3(4.48 KB)
📄 setjmperr.c(2.11 KB)
📄 setmode.3(3.56 KB)
📄 setmode.c(11.38 KB)
📄 setproctitle.3(3.54 KB)
📄 setproctitle.c(4.87 KB)
📄 setprogname.c(273 B)
📄 siginterrupt.3(3.74 KB)
📄 siginterrupt.c(2.29 KB)
📄 siglist.c(3.49 KB)
📄 signal.3(9.11 KB)
📄 signal.c(2.17 KB)
📄 sigsetops.3(4.15 KB)
📄 sigsetops.c(3.04 KB)
📄 sleep.3(2.88 KB)
📄 sleep.c(2.61 KB)
📄 srand48.c(859 B)
📄 statvfs.3(4.96 KB)
📄 statvfs.c(3.82 KB)
📄 stringlist.3(3.14 KB)
📄 stringlist.c(2.74 KB)
📄 strtofflags.3(2.96 KB)
📄 strtofflags.c(4.78 KB)
📄 sysconf.3(8.75 KB)
📄 sysconf.c(15.62 KB)
📄 sysctl.3(28.37 KB)
📄 sysctl.c(5.35 KB)
📄 sysctlbyname.c(1.81 KB)
📄 sysctlnametomib.c(2.14 KB)
📄 syslog.3(7.35 KB)
📄 syslog.c(12.21 KB)
📄 tcgetpgrp.3(2.6 KB)
📄 tcgetsid.3(2.24 KB)
📄 tcgetwinsize.3(4.62 KB)
📄 tcsendbreak.3(4.75 KB)
📄 tcsetattr.3(8.86 KB)
📄 tcsetpgrp.3(3.09 KB)
📄 tcsetsid.3(2.83 KB)
📄 telldir.c(5.62 KB)
📄 telldir.h(3.84 KB)
📄 termios.c(5.63 KB)
📄 time.3(2.94 KB)
📄 time.c(1.93 KB)
📄 times.3(3.62 KB)
📄 times.c(2.49 KB)
📄 timespec_get.3(2.52 KB)
📄 timespec_get.c(1.92 KB)
📄 timezone.3(2.29 KB)
📄 timezone.c(3.94 KB)
📄 tls.c(12.39 KB)
📄 trivial-getcontextx.c(1.97 KB)
📄 ttyname.3(3.39 KB)
📄 ttyname.c(3.24 KB)
📄 ttyslot.c(1.8 KB)
📄 tzset.3(7.41 KB)
📄 ualarm.3(2.88 KB)
📄 ualarm.c(2.33 KB)
📄 ucontext.3(3.57 KB)
📄 ulimit.3(2.8 KB)
📄 ulimit.c(2.25 KB)
📄 uname.3(3.14 KB)
📄 uname.c(1.91 KB)
📄 unvis-compat.c(1.89 KB)
📄 usleep.3(2.75 KB)
📄 usleep.c(2.2 KB)
📄 utime.3(2.74 KB)
📄 utime.c(2 KB)
📄 utxdb.c(4.56 KB)
📄 utxdb.h(2.2 KB)
📄 valloc.3(2.37 KB)
📄 valloc.c(1.85 KB)
📄 wait.c(2.1 KB)
📄 wait3.c(2.13 KB)
📄 waitid.c(2.49 KB)
📄 waitpid.c(2.15 KB)
📄 wordexp.3(5.04 KB)
📄 wordexp.c(10.48 KB)

Editing: opendir.c

/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 1983, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * 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/cdefs.h>
__SCCSID("@(#)opendir.c	8.8 (Berkeley) 5/1/95");
__FBSDID("$FreeBSD$");

#include "namespace.h"
#include <sys/param.h>

#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "un-namespace.h"

#include "gen-private.h"
#include "telldir.h"

static DIR * __opendir_common(int, int, bool);

/*
 * Open a directory.
 */
DIR *
opendir(const char *name)
{

return (__opendir2(name, DTF_HIDEW|DTF_NODUP));
}

/*
 * Open a directory with existing file descriptor.
 */
DIR *
fdopendir(int fd)
{

if (_fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
		return (NULL);
	return (__opendir_common(fd, DTF_HIDEW|DTF_NODUP, true));
}

DIR *
__opendir2(const char *name, int flags)
{
	int fd;
	DIR *dir;
	int saved_errno;

if ((flags & (__DTF_READALL | __DTF_SKIPREAD)) != 0)
		return (NULL);
	if ((fd = _open(name,
	    O_RDONLY | O_NONBLOCK | O_DIRECTORY | O_CLOEXEC)) == -1)
		return (NULL);

dir = __opendir_common(fd, flags, false);
	if (dir == NULL) {
		saved_errno = errno;
		_close(fd);
		errno = saved_errno;
	}
	return (dir);
}

static int
opendir_compar(const void *p1, const void *p2)
{

return (strcmp((*(const struct dirent * const *)p1)->d_name,
	    (*(const struct dirent * const *)p2)->d_name));
}

/*
 * For a directory at the top of a unionfs stack, the entire directory's
 * contents are read and cached locally until the next call to rewinddir().
 * For the fdopendir() case, the initial seek position must be preserved.
 * For rewinddir(), the full directory should always be re-read from the
 * beginning.
 *
 * If an error occurs, the existing buffer and state of 'dirp' is left
 * unchanged.
 */
bool
_filldir(DIR *dirp, bool use_current_pos)
{
	struct dirent **dpv;
	char *buf, *ddptr, *ddeptr;
	off_t pos;
	int fd2, incr, len, n, saved_errno, space;
	
	len = 0;
	space = 0;
	buf = NULL;
	ddptr = NULL;

/*
	 * Use the system page size if that is a multiple of DIRBLKSIZ.
	 * Hopefully this can be a big win someday by allowing page
	 * trades to user space to be done by _getdirentries().
	 */
	incr = getpagesize();
	if ((incr % DIRBLKSIZ) != 0) 
		incr = DIRBLKSIZ;

/*
	 * The strategy here is to read all the directory
	 * entries into a buffer, sort the buffer, and
	 * remove duplicate entries by setting the inode
	 * number to zero.
	 *
	 * We reopen the directory because _getdirentries()
	 * on a MNT_UNION mount modifies the open directory,
	 * making it refer to the lower directory after the
	 * upper directory's entries are exhausted.
	 * This would otherwise break software that uses
	 * the directory descriptor for fchdir or *at
	 * functions, such as fts.c.
	 */
	if ((fd2 = _openat(dirp->dd_fd, ".", O_RDONLY | O_CLOEXEC)) == -1)
		return (false);

if (use_current_pos) {
		pos = lseek(dirp->dd_fd, 0, SEEK_CUR);
		if (pos == -1 || lseek(fd2, pos, SEEK_SET) == -1) {
			saved_errno = errno;
			_close(fd2);
			errno = saved_errno;
			return (false);
		}
	}

do {
		/*
		 * Always make at least DIRBLKSIZ bytes
		 * available to _getdirentries
		 */
		if (space < DIRBLKSIZ) {
			space += incr;
			len += incr;
			buf = reallocf(buf, len);
			if (buf == NULL) {
				saved_errno = errno;
				_close(fd2);
				errno = saved_errno;
				return (false);
			}
			ddptr = buf + (len - space);
		}

n = _getdirentries(fd2, ddptr, space, &dirp->dd_seek);
		if (n > 0) {
			ddptr += n;
			space -= n;
		}
		if (n < 0) {
			saved_errno = errno;
			_close(fd2);
			errno = saved_errno;
			return (false);
		}
	} while (n > 0);
	_close(fd2);

ddeptr = ddptr;

/*
	 * There is now a buffer full of (possibly) duplicate
	 * names.
	 */
	dirp->dd_buf = buf;

/*
	 * Go round this loop twice...
	 *
	 * Scan through the buffer, counting entries.
	 * On the second pass, save pointers to each one.
	 * Then sort the pointers and remove duplicate names.
	 */
	for (dpv = NULL;;) {
		n = 0;
		ddptr = buf;
		while (ddptr < ddeptr) {
			struct dirent *dp;

dp = (struct dirent *) ddptr;
			if ((long)dp & 03L)
				break;
			if ((dp->d_reclen <= 0) ||
			    (dp->d_reclen > (ddeptr + 1 - ddptr)))
				break;
			ddptr += dp->d_reclen;
			if (dp->d_fileno) {
				if (dpv)
					dpv[n] = dp;
				n++;
			}
		}

if (dpv) {
			struct dirent *xp;

/*
			 * This sort must be stable.
			 */
			mergesort(dpv, n, sizeof(*dpv), opendir_compar);

dpv[n] = NULL;
			xp = NULL;

/*
			 * Scan through the buffer in sort order,
			 * zapping the inode number of any
			 * duplicate names.
			 */
			for (n = 0; dpv[n]; n++) {
				struct dirent *dp = dpv[n];

if ((xp == NULL) ||
				    strcmp(dp->d_name, xp->d_name)) {
					xp = dp;
				} else {
					dp->d_fileno = 0;
				}
				if (dp->d_type == DT_WHT &&
				    (dirp->dd_flags & DTF_HIDEW))
					dp->d_fileno = 0;
			}

free(dpv);
			break;
		} else {
			dpv = malloc((n+1) * sizeof(struct dirent *));
			if (dpv == NULL)
				break;
		}
	}

dirp->dd_len = len;
	dirp->dd_size = ddptr - dirp->dd_buf;
	return (true);
}

static bool
is_unionstack(int fd)
{
	int unionstack;

unionstack = _fcntl(fd, F_ISUNIONSTACK, 0);
	if (unionstack != -1)
		return (unionstack);

/*
	 * Should not happen unless running on a kernel without the op,
	 * but no use rendering the system useless in such a case.
	 */
	return (0);
}

/*
 * Common routine for opendir(3), __opendir2(3) and fdopendir(3).
 */
static DIR *
__opendir_common(int fd, int flags, bool use_current_pos)
{
	DIR *dirp;
	int incr;
	int saved_errno;
	bool unionstack;

if ((dirp = malloc(sizeof(DIR) + sizeof(struct _telldir))) == NULL)
		return (NULL);

dirp->dd_buf = NULL;
	dirp->dd_fd = fd;
	dirp->dd_flags = flags;
	dirp->dd_loc = 0;
	dirp->dd_lock = NULL;
	dirp->dd_td = (struct _telldir *)((char *)dirp + sizeof(DIR));
	LIST_INIT(&dirp->dd_td->td_locq);
	dirp->dd_td->td_loccnt = 0;
	dirp->dd_compat_de = NULL;

/*
	 * Determine whether this directory is the top of a union stack.
	 */
	unionstack = false;
	if (flags & DTF_NODUP) {
		unionstack = is_unionstack(fd);
	}

if (unionstack) {
		if (!_filldir(dirp, use_current_pos))
			goto fail;
		dirp->dd_flags |= __DTF_READALL;
	} else {
		dirp->dd_len = incr;
		dirp->dd_buf = malloc(dirp->dd_len);
		if (dirp->dd_buf == NULL)
			goto fail;
		if (use_current_pos) {
			/*
			 * Read the first batch of directory entries
			 * to prime dd_seek.  This also checks if the
			 * fd passed to fdopendir() is a directory.
			 */
			dirp->dd_size = _getdirentries(dirp->dd_fd,
			    dirp->dd_buf, dirp->dd_len, &dirp->dd_seek);
			if (dirp->dd_size < 0) {
				if (errno == EINVAL)
					errno = ENOTDIR;
				goto fail;
			}
			dirp->dd_flags |= __DTF_SKIPREAD;
		} else {
			dirp->dd_size = 0;
			dirp->dd_seek = 0;
		}
	}

return (dirp);

fail:
	saved_errno = errno;
	free(dirp->dd_buf);
	free(dirp);
	errno = saved_errno;
	return (NULL);
}

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Editing: opendir.c

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