diff --git a/include/dirent.h b/include/dirent.h index c77d844e399b..b894bb845329 100644 --- a/include/dirent.h +++ b/include/dirent.h @@ -1,113 +1,114 @@ /*- * Copyright (c) 1989, 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. * * @(#)dirent.h 8.2 (Berkeley) 7/28/94 * $FreeBSD$ */ #ifndef _DIRENT_H_ #define _DIRENT_H_ /* * The kernel defines the format of directory entries returned by * the getdirentries(2) system call. */ #include #include #if __XSI_VISIBLE /* * XXX this is probably illegal in the __XSI_VISIBLE case, but brings us closer * to the specification. */ #define d_ino d_fileno /* backward and XSI compatibility */ #endif #if __BSD_VISIBLE #include /* definitions for library routines operating on directories. */ #define DIRBLKSIZ 1024 struct _dirdesc; typedef struct _dirdesc DIR; /* flags for opendir2 */ #define DTF_HIDEW 0x0001 /* hide whiteout entries */ #define DTF_NODUP 0x0002 /* don't return duplicate names */ #define DTF_REWIND 0x0004 /* rewind after reading union stack */ #define __DTF_READALL 0x0008 /* everything has been read */ +#define __DTF_SKIPREAD 0x0010 /* assume internal buffer is populated */ #else /* !__BSD_VISIBLE */ typedef void * DIR; #endif /* __BSD_VISIBLE */ #ifndef _KERNEL __BEGIN_DECLS #if __POSIX_VISIBLE >= 200809 || __XSI_VISIBLE >= 700 int alphasort(const struct dirent **, const struct dirent **); int dirfd(DIR *); #endif #if __BSD_VISIBLE DIR *__opendir2(const char *, int); int fdclosedir(DIR *); int getdents(int, char *, int); int getdirentries(int, char *, int, long *); #endif DIR *opendir(const char *); DIR *fdopendir(int); struct dirent * readdir(DIR *); #if __POSIX_VISIBLE >= 199506 || __XSI_VISIBLE >= 500 int readdir_r(DIR *, struct dirent *, struct dirent **); #endif void rewinddir(DIR *); #if __POSIX_VISIBLE >= 200809 || __XSI_VISIBLE >= 700 int scandir(const char *, struct dirent ***, int (*)(const struct dirent *), int (*)(const struct dirent **, const struct dirent **)); #ifdef __BLOCKS__ int scandir_b(const char *, struct dirent ***, int (^)(const struct dirent *), int (^)(const struct dirent **, const struct dirent **)); #endif #endif #if __XSI_VISIBLE void seekdir(DIR *, long); long telldir(DIR *); #endif int closedir(DIR *); __END_DECLS #endif /* !_KERNEL */ #endif /* !_DIRENT_H_ */ diff --git a/lib/libc/gen/gen-private.h b/lib/libc/gen/gen-private.h index e8854ad2d856..d1fab5f31462 100644 --- a/lib/libc/gen/gen-private.h +++ b/lib/libc/gen/gen-private.h @@ -1,59 +1,58 @@ /*- * Copyright (c) 1989, 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. * * $FreeBSD$ */ #ifndef _GEN_PRIVATE_H_ #define _GEN_PRIVATE_H_ struct _telldir; /* see telldir.h */ struct pthread_mutex; /* * Structure describing an open directory. * * NOTE. Change structure layout with care, at least dd_fd field has to * remain unchanged to guarantee backward compatibility. */ struct _dirdesc { int dd_fd; /* file descriptor associated with directory */ long dd_loc; /* offset in current buffer */ long dd_size; /* amount of data returned by getdirentries */ char *dd_buf; /* data buffer */ int dd_len; /* size of data buffer */ long dd_seek; /* magic cookie returned by getdirentries */ - long dd_rewind; /* magic cookie for rewinding */ int dd_flags; /* flags for readdir */ struct pthread_mutex *dd_lock; /* lock */ struct _telldir *dd_td; /* telldir position recording */ }; #define _dirfd(dirp) ((dirp)->dd_fd) #endif /* !_GEN_PRIVATE_H_ */ diff --git a/lib/libc/gen/opendir.c b/lib/libc/gen/opendir.c index a9eb0af1ba4b..54928e73d60c 100644 --- a/lib/libc/gen/opendir.c +++ b/lib/libc/gen/opendir.c @@ -1,317 +1,360 @@ /*- * 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. * 4. 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. */ #if defined(LIBC_SCCS) && !defined(lint) static char sccsid[] = "@(#)opendir.c 8.8 (Berkeley) 5/1/95"; #endif /* LIBC_SCCS and not lint */ #include __FBSDID("$FreeBSD$"); #include "namespace.h" #include #include #include #include #include #include #include #include #include #include "un-namespace.h" #include "gen-private.h" #include "telldir.h" -static DIR * __opendir_common(int, int); +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) { - struct stat statb; - /* Check that fd is associated with a directory. */ - if (_fstat(fd, &statb) != 0) - return (NULL); - if (!S_ISDIR(statb.st_mode)) { - errno = ENOTDIR; - return (NULL); - } if (_fcntl(fd, F_SETFD, FD_CLOEXEC) == -1) return (NULL); - return (__opendir_common(fd, DTF_HIDEW|DTF_NODUP)); + 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); + 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 **)p1)->d_name, (*(const struct dirent **)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 = 0;;) { + 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); +} + + /* * Common routine for opendir(3), __opendir2(3) and fdopendir(3). */ static DIR * -__opendir_common(int fd, int flags) +__opendir_common(int fd, int flags, bool use_current_pos) { DIR *dirp; int incr; int saved_errno; int unionstack; - int fd2; - - fd2 = -1; 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; /* * 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; /* * Determine whether this directory is the top of a union stack. */ if (flags & DTF_NODUP) { struct statfs sfb; if (_fstatfs(fd, &sfb) < 0) goto fail; unionstack = !strcmp(sfb.f_fstypename, "unionfs") || (sfb.f_flags & MNT_UNION); } else { unionstack = 0; } if (unionstack) { - int len = 0; - int space = 0; - char *buf = 0; - char *ddptr = 0; - char *ddeptr; - int n; - struct dirent **dpv; - - /* - * 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(fd, ".", O_RDONLY | O_CLOEXEC)) == -1) { - saved_errno = errno; - free(buf); - free(dirp); - errno = saved_errno; - return (NULL); - } - - do { - /* - * Always make at least DIRBLKSIZ bytes - * available to _getdirentries - */ - if (space < DIRBLKSIZ) { - space += incr; - len += incr; - buf = reallocf(buf, len); - if (buf == NULL) - goto fail; - ddptr = buf + (len - space); - } - - n = _getdirentries(fd2, ddptr, space, &dirp->dd_seek); - if (n > 0) { - ddptr += n; - space -= n; - } - } while (n > 0); - - ddeptr = ddptr; - flags |= __DTF_READALL; - - _close(fd2); - fd2 = -1; - - /* - * 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 = 0;;) { - 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 && - (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; + if (!_filldir(dirp, use_current_pos)) + goto fail; + dirp->dd_flags |= __DTF_READALL; } else { dirp->dd_len = incr; - dirp->dd_size = 0; dirp->dd_buf = malloc(dirp->dd_len); if (dirp->dd_buf == NULL) goto fail; - dirp->dd_seek = 0; + 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; + } } - dirp->dd_loc = 0; - dirp->dd_fd = fd; - dirp->dd_flags = flags; - dirp->dd_lock = NULL; - - /* - * Set up seek point for rewinddir. - */ - dirp->dd_rewind = telldir(dirp); - return (dirp); fail: saved_errno = errno; - if (fd2 != -1) - _close(fd2); + free(dirp->dd_buf); free(dirp); errno = saved_errno; return (NULL); } diff --git a/lib/libc/gen/readdir.c b/lib/libc/gen/readdir.c index 324870b39ad1..69f59d16087a 100644 --- a/lib/libc/gen/readdir.c +++ b/lib/libc/gen/readdir.c @@ -1,133 +1,135 @@ /* * 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. * 4. 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. */ #if defined(LIBC_SCCS) && !defined(lint) static char sccsid[] = "@(#)readdir.c 8.3 (Berkeley) 9/29/94"; #endif /* LIBC_SCCS and not lint */ #include __FBSDID("$FreeBSD$"); #include "namespace.h" #include #include #include #include #include #include "un-namespace.h" #include "libc_private.h" #include "gen-private.h" #include "telldir.h" /* * get next entry in a directory. */ struct dirent * _readdir_unlocked(dirp, skip) DIR *dirp; int skip; { struct dirent *dp; for (;;) { if (dirp->dd_loc >= dirp->dd_size) { if (dirp->dd_flags & __DTF_READALL) return (NULL); dirp->dd_loc = 0; } - if (dirp->dd_loc == 0 && !(dirp->dd_flags & __DTF_READALL)) { + if (dirp->dd_loc == 0 && + !(dirp->dd_flags & (__DTF_READALL | __DTF_SKIPREAD))) { dirp->dd_size = _getdirentries(dirp->dd_fd, dirp->dd_buf, dirp->dd_len, &dirp->dd_seek); if (dirp->dd_size <= 0) return (NULL); } + dirp->dd_flags &= ~__DTF_SKIPREAD; dp = (struct dirent *)(dirp->dd_buf + dirp->dd_loc); if ((long)dp & 03L) /* bogus pointer check */ return (NULL); if (dp->d_reclen <= 0 || dp->d_reclen > dirp->dd_len + 1 - dirp->dd_loc) return (NULL); dirp->dd_loc += dp->d_reclen; if (dp->d_ino == 0 && skip) continue; if (dp->d_type == DT_WHT && (dirp->dd_flags & DTF_HIDEW)) continue; return (dp); } } struct dirent * readdir(dirp) DIR *dirp; { struct dirent *dp; if (__isthreaded) { _pthread_mutex_lock(&dirp->dd_lock); dp = _readdir_unlocked(dirp, 1); _pthread_mutex_unlock(&dirp->dd_lock); } else dp = _readdir_unlocked(dirp, 1); return (dp); } int readdir_r(dirp, entry, result) DIR *dirp; struct dirent *entry; struct dirent **result; { struct dirent *dp; int saved_errno; saved_errno = errno; errno = 0; if (__isthreaded) { _pthread_mutex_lock(&dirp->dd_lock); if ((dp = _readdir_unlocked(dirp, 1)) != NULL) memcpy(entry, dp, _GENERIC_DIRSIZ(dp)); _pthread_mutex_unlock(&dirp->dd_lock); } else if ((dp = _readdir_unlocked(dirp, 1)) != NULL) memcpy(entry, dp, _GENERIC_DIRSIZ(dp)); if (errno != 0) { if (dp == NULL) return (errno); } else errno = saved_errno; if (dp != NULL) *result = entry; else *result = NULL; return (0); } diff --git a/lib/libc/gen/rewinddir.c b/lib/libc/gen/rewinddir.c index 0eb091a08246..e1168b3570e2 100644 --- a/lib/libc/gen/rewinddir.c +++ b/lib/libc/gen/rewinddir.c @@ -1,49 +1,63 @@ /*- * Copyright (c) 1990, 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. * 4. 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. */ #if defined(LIBC_SCCS) && !defined(lint) static char sccsid[] = "@(#)rewinddir.c 8.1 (Berkeley) 6/8/93"; #endif /* LIBC_SCCS and not lint */ #include __FBSDID("$FreeBSD$"); +#include "namespace.h" #include #include +#include +#include +#include "un-namespace.h" +#include "libc_private.h" #include "gen-private.h" #include "telldir.h" void rewinddir(dirp) DIR *dirp; { - _seekdir(dirp, dirp->dd_rewind); - dirp->dd_rewind = telldir(dirp); + if (__isthreaded) + _pthread_mutex_lock(&dirp->dd_lock); + if (dirp->dd_flags & __DTF_READALL) + _filldir(dirp, false); + else if (dirp->dd_seek != 0) { + (void) lseek(dirp->dd_fd, 0, SEEK_SET); + dirp->dd_seek = 0; + } + dirp->dd_loc = 0; + if (__isthreaded) + _pthread_mutex_unlock(&dirp->dd_lock); } diff --git a/lib/libc/gen/telldir.h b/lib/libc/gen/telldir.h index ef930d2b80b7..04989bb7b536 100644 --- a/lib/libc/gen/telldir.h +++ b/lib/libc/gen/telldir.h @@ -1,66 +1,68 @@ /* * Copyright (c) 1983, 1993 * The Regents of the University of California. All rights reserved. * * Copyright (c) 2000 * Daniel Eischen. 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. * * $FreeBSD$ */ #ifndef _TELLDIR_H_ #define _TELLDIR_H_ #include +#include /* * One of these structures is malloced to describe the current directory * position each time telldir is called. It records the current magic * cookie returned by getdirentries and the offset within the buffer * associated with that return value. */ struct ddloc { LIST_ENTRY(ddloc) loc_lqe; /* entry in list */ long loc_index; /* key associated with structure */ long loc_seek; /* magic cookie returned by getdirentries */ long loc_loc; /* offset of entry in buffer */ }; /* * One of these structures is malloced for each DIR to record telldir * positions. */ struct _telldir { LIST_HEAD(, ddloc) td_locq; /* list of locations */ long td_loccnt; /* index of entry for sequential readdir's */ }; +bool _filldir(DIR *, bool); struct dirent *_readdir_unlocked(DIR *, int); void _reclaim_telldir(DIR *); void _seekdir(DIR *, long); #endif