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193 | use strict 'vars'; |
193 | use strict 'vars'; |
194 | |
194 | |
195 | use base 'Exporter'; |
195 | use base 'Exporter'; |
196 | |
196 | |
197 | BEGIN { |
197 | BEGIN { |
198 | our $VERSION = '3.19'; |
198 | our $VERSION = '3.2'; |
199 | |
199 | |
200 | our @AIO_REQ = qw(aio_sendfile aio_read aio_write aio_open aio_close |
200 | our @AIO_REQ = qw(aio_sendfile aio_read aio_write aio_open aio_close |
201 | aio_stat aio_lstat aio_unlink aio_rmdir aio_readdir aio_readdirx |
201 | aio_stat aio_lstat aio_unlink aio_rmdir aio_readdir aio_readdirx |
202 | aio_scandir aio_symlink aio_readlink aio_sync aio_fsync |
202 | aio_scandir aio_symlink aio_readlink aio_sync aio_fsync |
203 | aio_fdatasync aio_sync_file_range aio_pathsync aio_readahead |
203 | aio_fdatasync aio_sync_file_range aio_pathsync aio_readahead |
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577 | |
577 | |
578 | When this flag is set, then the names will be returned in an order where |
578 | When this flag is set, then the names will be returned in an order where |
579 | likely directories come first. This is useful when you need to quickly |
579 | likely directories come first. This is useful when you need to quickly |
580 | find directories, or you want to find all directories while avoiding to |
580 | find directories, or you want to find all directories while avoiding to |
581 | stat() each entry. |
581 | stat() each entry. |
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582 | |
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583 | If the system returns type information in readdir, then this is used |
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584 | to find directories directly. Otherwise, likely directories are files |
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585 | beginning with ".", or otherwise files with no dots, of which files with |
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586 | short names are tried first. |
582 | |
587 | |
583 | =item AIO::READDIR_STAT_ORDER |
588 | =item AIO::READDIR_STAT_ORDER |
584 | |
589 | |
585 | When this flag is set, then the names will be returned in an order |
590 | When this flag is set, then the names will be returned in an order |
586 | suitable for stat()'ing each one. That is, when you plan to stat() |
591 | suitable for stat()'ing each one. That is, when you plan to stat() |
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770 | |
775 | |
771 | Implementation notes. |
776 | Implementation notes. |
772 | |
777 | |
773 | The C<aio_readdir> cannot be avoided, but C<stat()>'ing every entry can. |
778 | The C<aio_readdir> cannot be avoided, but C<stat()>'ing every entry can. |
774 | |
779 | |
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780 | If readdir returns file type information, then this is used directly to |
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781 | find directories. |
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782 | |
775 | After reading the directory, the modification time, size etc. of the |
783 | Otherwise, after reading the directory, the modification time, size etc. |
776 | directory before and after the readdir is checked, and if they match (and |
784 | of the directory before and after the readdir is checked, and if they |
777 | isn't the current time), the link count will be used to decide how many |
785 | match (and isn't the current time), the link count will be used to decide |
778 | entries are directories (if >= 2). Otherwise, no knowledge of the number |
786 | how many entries are directories (if >= 2). Otherwise, no knowledge of the |
779 | of subdirectories will be assumed. |
787 | number of subdirectories will be assumed. |
780 | |
788 | |
781 | Then entries will be sorted into likely directories (everything without |
789 | Then entries will be sorted into likely directories a non-initial dot |
782 | a non-initial dot currently) and likely non-directories (everything |
790 | currently) and likely non-directories (see C<aio_readdirx>). Then every |
783 | else). Then every entry plus an appended C</.> will be C<stat>'ed, |
791 | entry plus an appended C</.> will be C<stat>'ed, likely directories first, |
784 | likely directories first. If that succeeds, it assumes that the entry |
792 | in order of their inode numbers. If that succeeds, it assumes that the |
785 | is a directory or a symlink to directory (which will be checked |
793 | entry is a directory or a symlink to directory (which will be checked |
786 | seperately). This is often faster than stat'ing the entry itself because |
794 | seperately). This is often faster than stat'ing the entry itself because |
787 | filesystems might detect the type of the entry without reading the inode |
795 | filesystems might detect the type of the entry without reading the inode |
788 | data (e.g. ext2fs filetype feature). |
796 | data (e.g. ext2fs filetype feature), even on systems that cannot return |
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797 | the filetype information on readdir. |
789 | |
798 | |
790 | If the known number of directories (link count - 2) has been reached, the |
799 | If the known number of directories (link count - 2) has been reached, the |
791 | rest of the entries is assumed to be non-directories. |
800 | rest of the entries is assumed to be non-directories. |
792 | |
801 | |
793 | This only works with certainty on POSIX (= UNIX) filesystems, which |
802 | This only works with certainty on POSIX (= UNIX) filesystems, which |
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835 | # if nlink == 2, we are finished |
844 | # if nlink == 2, we are finished |
836 | # on non-posix-fs's, we rely on nlink < 2 |
845 | # on non-posix-fs's, we rely on nlink < 2 |
837 | $ndirs = (stat _)[3] - 2 |
846 | $ndirs = (stat _)[3] - 2 |
838 | or return $grp->result ([], $entries); |
847 | or return $grp->result ([], $entries); |
839 | } |
848 | } |
840 | |
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841 | # sort into likely dirs and likely nondirs |
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842 | # dirs == files without ".", short entries first |
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843 | $entries = [map $_->[0], |
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844 | sort { $b->[1] cmp $a->[1] } |
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845 | map [$_, sprintf "%s%04d", (/.\./ ? "1" : "0"), length], |
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846 | @$entries]; |
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847 | |
849 | |
848 | my (@dirs, @nondirs); |
850 | my (@dirs, @nondirs); |
849 | |
851 | |
850 | my $statgrp = add $grp aio_group sub { |
852 | my $statgrp = add $grp aio_group sub { |
851 | $grp->result (\@dirs, \@nondirs); |
853 | $grp->result (\@dirs, \@nondirs); |