diff options
| -rw-r--r-- | include/dirent.h | 1 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/readdir.c | 18 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/readdir_r.c | 78 |
3 files changed, 30 insertions, 67 deletions
diff --git a/include/dirent.h b/include/dirent.h index fdf4c4a2f1..8325a19e5f 100644 --- a/include/dirent.h +++ b/include/dirent.h @@ -20,6 +20,7 @@ extern DIR *__opendirat (int dfd, const char *__name) attribute_hidden; extern DIR *__fdopendir (int __fd) attribute_hidden; extern int __closedir (DIR *__dirp) attribute_hidden; extern struct dirent *__readdir (DIR *__dirp) attribute_hidden; +extern struct dirent *__readdir_unlocked (DIR *__dirp) attribute_hidden; extern struct dirent64 *__readdir64 (DIR *__dirp); libc_hidden_proto (__readdir64) extern int __readdir_r (DIR *__dirp, struct dirent *__entry, diff --git a/sysdeps/unix/sysv/linux/readdir.c b/sysdeps/unix/sysv/linux/readdir.c index 2e03e66e69..ca2a8964e9 100644 --- a/sysdeps/unix/sysv/linux/readdir.c +++ b/sysdeps/unix/sysv/linux/readdir.c @@ -23,15 +23,11 @@ /* Read a directory entry from DIRP. */ struct dirent * -__readdir (DIR *dirp) +__readdir_unlocked (DIR *dirp) { struct dirent *dp; int saved_errno = errno; -#if IS_IN (libc) - __libc_lock_lock (dirp->lock); -#endif - do { size_t reclen; @@ -75,6 +71,18 @@ __readdir (DIR *dirp) /* Skip deleted files. */ } while (dp->d_ino == 0); + return dp; +} + +struct dirent * +__readdir (DIR *dirp) +{ + struct dirent *dp; + +#if IS_IN (libc) + __libc_lock_lock (dirp->lock); +#endif + dp = __readdir_unlocked (dirp); #if IS_IN (libc) __libc_lock_unlock (dirp->lock); #endif diff --git a/sysdeps/unix/sysv/linux/readdir_r.c b/sysdeps/unix/sysv/linux/readdir_r.c index 0069041394..28cbe9b038 100644 --- a/sysdeps/unix/sysv/linux/readdir_r.c +++ b/sysdeps/unix/sysv/linux/readdir_r.c @@ -25,89 +25,43 @@ __readdir_r (DIR *dirp, struct dirent *entry, struct dirent **result) { struct dirent *dp; size_t reclen; - const int saved_errno = errno; - int ret; __libc_lock_lock (dirp->lock); - do + while (1) { - if (dirp->offset >= dirp->size) - { - /* We've emptied out our buffer. Refill it. */ - - size_t maxread = dirp->allocation; - ssize_t bytes; - - maxread = dirp->allocation; - - bytes = __getdents (dirp->fd, dirp->data, maxread); - if (bytes <= 0) - { - /* On some systems getdents fails with ENOENT when the - open directory has been rmdir'd already. POSIX.1 - requires that we treat this condition like normal EOF. */ - if (bytes < 0 && errno == ENOENT) - { - bytes = 0; - __set_errno (saved_errno); - } - if (bytes < 0) - dirp->errcode = errno; - - dp = NULL; - break; - } - dirp->size = (size_t) bytes; - - /* Reset the offset into the buffer. */ - dirp->offset = 0; - } - - dp = (struct dirent *) &dirp->data[dirp->offset]; + dp = __readdir_unlocked (dirp); + if (dp == NULL) + break; reclen = dp->d_reclen; + if (reclen <= offsetof (struct dirent, d_name) + NAME_MAX + 1) + break; - dirp->offset += reclen; - - dirp->filepos = dp->d_off; - - if (reclen > offsetof (struct dirent, d_name) + NAME_MAX + 1) + /* The record is very long. It could still fit into the caller-supplied + buffer if we can skip padding at the end. */ + size_t namelen = _D_EXACT_NAMLEN (dp); + if (namelen <= NAME_MAX) { - /* The record is very long. It could still fit into the - caller-supplied buffer if we can skip padding at the - end. */ - size_t namelen = _D_EXACT_NAMLEN (dp); - if (namelen <= NAME_MAX) - reclen = offsetof (struct dirent, d_name) + namelen + 1; - else - { - /* The name is too long. Ignore this file. */ - dirp->errcode = ENAMETOOLONG; - dp->d_ino = 0; - continue; - } + reclen = offsetof (struct dirent, d_name) + namelen + 1; + break; } - /* Skip deleted and ignored files. */ + /* The name is too long. Ignore this file. */ + dirp->errcode = ENAMETOOLONG; } - while (dp->d_ino == 0); if (dp != NULL) { *result = memcpy (entry, dp, reclen); entry->d_reclen = reclen; - ret = 0; } else - { - *result = NULL; - ret = dirp->errcode; - } + *result = NULL; __libc_lock_unlock (dirp->lock); - return ret; + return dp != NULL ? 0 : dirp->errcode; } weak_alias (__readdir_r, readdir_r) |