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head/lib/libc/gen/opendir.c
| Show First 20 Lines • Show All 267 Lines • ▼ Show 20 Lines | for (dpv = NULL;;) { | ||||
| } | } | ||||
| } | } | ||||
| dirp->dd_len = len; | dirp->dd_len = len; | ||||
| dirp->dd_size = ddptr - dirp->dd_buf; | dirp->dd_size = ddptr - dirp->dd_buf; | ||||
| return (true); | return (true); | ||||
| } | } | ||||
| static bool | |||||
| is_unionstack(int fd) | |||||
| { | |||||
| struct statfs sfb; | |||||
| int unionstack; | |||||
| unionstack = _fcntl(fd, F_ISUNIONSTACK); | |||||
| if (unionstack != -1) | |||||
| return (unionstack); | |||||
| /* | /* | ||||
| * Temporary compat for kernels which don't provide F_ISUNIONSTACK. | |||||
| */ | |||||
| if (_fstatfs(fd, &sfb) < 0) | |||||
| return (true); | |||||
| return (strcmp(sfb.f_fstypename, "unionfs") == 0 || | |||||
| (sfb.f_flags & MNT_UNION)); | |||||
| } | |||||
| /* | |||||
| * Common routine for opendir(3), __opendir2(3) and fdopendir(3). | * Common routine for opendir(3), __opendir2(3) and fdopendir(3). | ||||
| */ | */ | ||||
| static DIR * | static DIR * | ||||
| __opendir_common(int fd, int flags, bool use_current_pos) | __opendir_common(int fd, int flags, bool use_current_pos) | ||||
| { | { | ||||
| DIR *dirp; | DIR *dirp; | ||||
| int incr; | int incr; | ||||
| int saved_errno; | int saved_errno; | ||||
| Show All 21 Lines | __opendir_common(int fd, int flags, bool use_current_pos) | ||||
| if ((incr % DIRBLKSIZ) != 0) | if ((incr % DIRBLKSIZ) != 0) | ||||
| incr = DIRBLKSIZ; | incr = DIRBLKSIZ; | ||||
| /* | /* | ||||
| * Determine whether this directory is the top of a union stack. | * Determine whether this directory is the top of a union stack. | ||||
| */ | */ | ||||
| unionstack = false; | unionstack = false; | ||||
| if (flags & DTF_NODUP) { | if (flags & DTF_NODUP) { | ||||
| struct statfs sfb; | unionstack = is_unionstack(fd); | ||||
| if (_fstatfs(fd, &sfb) == 0) { | |||||
| unionstack = strcmp(sfb.f_fstypename, "unionfs") == 0 || | |||||
| (sfb.f_flags & MNT_UNION); | |||||
| } | |||||
| } | } | ||||
| if (unionstack) { | if (unionstack) { | ||||
| if (!_filldir(dirp, use_current_pos)) | if (!_filldir(dirp, use_current_pos)) | ||||
| goto fail; | goto fail; | ||||
| dirp->dd_flags |= __DTF_READALL; | dirp->dd_flags |= __DTF_READALL; | ||||
| } else { | } else { | ||||
| dirp->dd_len = incr; | dirp->dd_len = incr; | ||||
| Show All 32 Lines | |||||