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- From: lwall@jpl-devvax.JPL.NASA.GOV (Larry Wall)
- Newsgroups: comp.lang.perl
- Subject: Re: find2perl
- Message-ID: <11709@jpl-devvax.JPL.NASA.GOV>
- Date: 7 Mar 91 02:27:36 GMT
- References: <11674@jpl-devvax.JPL.NASA.GOV> <40887@genrad.UUCP>
- Reply-To: lwall@jpl-devvax.JPL.NASA.GOV (Larry Wall)
- Organization: Jet Propulsion Laboratory, Pasadena, CA
- Lines: 675
-
- In article <40887@genrad.UUCP> rep@thor.genrad.COM (Pete Peterson) writes:
- : In article <11674@jpl-devvax.JPL.NASA.GOV> lwall@jpl-devvax.JPL.NASA.GOV (Larry Wall) writes:
- : >This is an alpha version of find2perl. It spits out a perl script that
- : >does the same thing (hopefully) as the corresponding find command.
- : >
- : >Usage:
- : >
- : > find2perl . -name '*.bak' -print | perl
- : >
- : >This isn't thoroughly tested. It does do -print0 and -eval. It doesn't
- : >do -ls or -cpio (yet). It does try pretty hard to avoid unnecessary
- : >stats.
- :
- : OK, I give up. I'll ask the dumb question. Why does it do:
- : $pat = "*$pat*" unless $pat =~ tr/?*[//;
- :
- : thus changing "find2perl . -name 'core'" into "find2perl . -name '*core*'"?
-
- Not a dumb question at all. I misread the man page, and got confused by
- a feature that only applies to "fast find".
-
- I've fixed that, and added -depth, -ls, -cpio, -ncpio and -tar. So you
- can call this a beta.
-
- I didn't realize till now just how much random crap tar and cpio leave sitting
- around in their output files...
-
- BTW, Sun's find -cpio sets the inode number of a directory wrong, though
- it's probable that no one actually looks at it.
-
- Larry
-
- #!/bin/sh
- : make a subdirectory, cd to it, and run this through sh.
- echo 'If this kit is complete, "End of kit" will echo at the end'
- echo Extracting find2perl
- sed >find2perl <<'!STUFFY!FUNK!' -e 's/X//'
- X#!/usr/bin/perl
- X
- Xwhile ($ARGV[0] =~ /^[^-(]/) {
- X push(@roots, shift);
- X}
- X@roots = ('.') unless @roots;
- Xfor (@roots) { $_ = "e($_); }
- X$roots = join(',', @roots);
- X
- X$indent = 1;
- X
- Xwhile (@ARGV) {
- X $_ = shift;
- X if ($_ eq '(') {
- X $out .= &tab . "(\n";
- X $indent++;
- X next;
- X }
- X elsif ($_ eq ')') {
- X $indent--;
- X $out .= &tab . ")";
- X }
- X elsif ($_ eq '!') {
- X $out .= &tab . "!";
- X next;
- X }
- X else {
- X s/^-// || die "Unrecognized switch: $_\n";
- X }
- X if ($_ eq 'name') {
- X $out .= &tab;
- X $pat = &fileglob_to_re(shift);
- X $out .= '/' . $pat . "/";
- X }
- X elsif ($_ eq 'perm') {
- X $onum = shift;
- X die "Malformed -perm argument: $onum\n" unless $onum =~ /^-?[0-7]+$/;
- X if ($onum =~ s/^-//) {
- X $onum = '0' . sprintf("%o", oct($onum) & 017777); # s/b 07777 ?
- X $out .= &tab . "(\$mode & $onum) == $onum";
- X }
- X else {
- X $onum = '0' . $onum unless $onum =~ /^0/;
- X $out .= &tab . "(\$mode & 0777) == $onum";
- X }
- X }
- X elsif ($_ eq 'type') {
- X ($filetest = shift) =~ tr/s/S/;
- X $out .= &tab . "-$filetest _";
- X }
- X elsif ($_ eq 'print') {
- X $out .= &tab . 'print("$name\n")';
- X }
- X elsif ($_ eq 'print0') {
- X $out .= &tab . 'print("$name\0")';
- X }
- X elsif ($_ eq 'fstype') {
- X $out .= &tab;
- X $type = shift;
- X if ($type eq 'nfs')
- X { $out .= '$dev < 0'; }
- X else
- X { $out .= '$dev >= 0'; }
- X }
- X elsif ($_ eq 'user') {
- X $uname = shift;
- X $out .= &tab . "\$uid == \$uid{'$uname'}";
- X $inituser++;
- X }
- X elsif ($_ eq 'group') {
- X $gname = shift;
- X $out .= &tab . "\$gid == \$gid('$gname')";
- X $initgroup++;
- X }
- X elsif ($_ eq 'nouser') {
- X $out .= &tab . '!defined $uid{$uid}';
- X $inituser++;
- X }
- X elsif ($_ eq 'nogroup') {
- X $out .= &tab . '!defined $gid{$gid}';
- X $initgroup++;
- X }
- X elsif ($_ eq 'links') {
- X $out .= &tab . '$nlink ' . &n(shift);
- X }
- X elsif ($_ eq 'inum') {
- X $out .= &tab . '$ino ' . &n(shift);
- X }
- X elsif ($_ eq 'size') {
- X $out .= &tab . 'int((-s _ + 511) / 512) ' . &n(shift);
- X }
- X elsif ($_ eq 'atime') {
- X $out .= &tab . 'int(-A _) ' . &n(shift);
- X }
- X elsif ($_ eq 'mtime') {
- X $out .= &tab . 'int(-M _) ' . &n(shift);
- X }
- X elsif ($_ eq 'ctime') {
- X $out .= &tab . 'int(-C _) ' . &n(shift);
- X }
- X elsif ($_ eq 'exec') {
- X for (@cmd = (); @ARGV && $ARGV[0] ne ';'; push(@cmd,shift)) { }
- X shift;
- X for (@cmd) { s/'/\\'/g; }
- X $" = "','";
- X $out .= &tab . "&exec(0, '@cmd')";
- X $" = ' ';
- X $initexec++;
- X }
- X elsif ($_ eq 'ok') {
- X for (@cmd = (); @ARGV && $ARGV[0] ne ';'; push(@cmd,shift)) { }
- X shift;
- X for (@cmd) { s/'/\\'/g; }
- X $" = "','";
- X $out .= &tab . "&exec(1, '@cmd')";
- X $" = ' ';
- X $initexec++;
- X }
- X elsif ($_ eq 'prune') {
- X $out .= &tab . '($prune = 1)';
- X }
- X elsif ($_ eq 'xdev') {
- X $out .= &tab . '(($prune |= ($dev != $topdev)),1)';
- X }
- X elsif ($_ eq 'newer') {
- X $out .= &tab;
- X $file = shift;
- X $newername = 'AGE_OF' . $file;
- X $newername =~ s/[^\w]/_/g;
- X $newername = '$' . $newername;
- X $out .= "-M _ < $newername";
- X $initnewer .= "$newername = -M " . "e($file) . ";\n";
- X }
- X elsif ($_ eq 'eval') {
- X $prog = "e(shift);
- X $out .= &tab . "eval $prog";
- X }
- X elsif ($_ eq 'depth') {
- X $depth++;
- X next;
- X }
- X elsif ($_ eq 'ls') {
- X $out .= &tab . "&ls";
- X $initls++;
- X }
- X elsif ($_ eq 'tar') {
- X $out .= &tab;
- X die "-tar must have a filename argument\n" unless @ARGV;
- X $file = shift;
- X $fh = 'FH' . $file;
- X $fh =~ s/[^\w]/_/g;
- X $out .= "&tar($fh)";
- X $file = '>' . $file;
- X $initfile .= "open($fh, " . "e($file) .
- X qq{) || die "Can't open $fh: \$!\\n";\n};
- X $inittar++;
- X $flushall = "\n&tflushall;\n";
- X }
- X elsif (/^n?cpio$/) {
- X $depth++;
- X $out .= &tab;
- X die "-$_ must have a filename argument\n" unless @ARGV;
- X $file = shift;
- X $fh = 'FH' . $file;
- X $fh =~ s/[^\w]/_/g;
- X $out .= "&cpio('" . substr($_,0,1) . "', $fh)";
- X $file = '>' . $file;
- X $initfile .= "open($fh, " . "e($file) .
- X qq{) || die "Can't open $fh: \$!\\n";\n};
- X $initcpio++;
- X $flushall = "\n&flushall;\n";
- X }
- X else {
- X die "Unrecognized switch: -$_\n";
- X }
- X if (@ARGV) {
- X if ($ARGV[0] eq '-o') {
- X $out .= " ||\n";
- X shift;
- X }
- X else {
- X $out .= " &&" unless $ARGV[0] eq ')';
- X $out .= "\n";
- X shift if $ARGV[0] eq '-a';
- X }
- X }
- X}
- X
- Xprint <<'END';
- X#!/usr/bin/perl
- X
- XEND
- X
- Xif ($initls) {
- X print <<'END';
- X@rwx = ('---','--x','-w-','-wx','r--','r-x','rw-','rwx');
- X@moname = (Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec);
- X
- XEND
- X}
- X
- Xif ($inituser || $initls) {
- X print 'while (($name, $pw, $uid) = getpwent) {', "\n";
- X print ' $uid{$name} = $uid{$uid} = $uid;', "\n" if $inituser;
- X print ' $user{$uid} = $name unless $user{$uid};', "\n" if $initls;
- X print "}\n\n";
- X}
- X
- Xif ($initgroup || $initls) {
- X print 'while (($name, $pw, $gid) = getgrent) {', "\n";
- X print ' $gid{$name} = $gid{$gid} = $gid;', "\n" if $initgroup;
- X print ' $group{$gid} = $name unless $group{$gid};', "\n" if $initls;
- X print "}\n\n";
- X}
- X
- Xprint $initnewer, "\n" if $initnewer;
- X
- Xprint $initfile, "\n" if $initfile;
- X
- Xprint <<"END";
- X# Traverse desired filesystems
- X
- X&dodirs($roots);
- X$flushall
- Xexit;
- X
- Xsub wanted {
- X$out;
- X}
- X
- XEND
- X
- Xprint <<'END';
- Xsub dodirs {
- X chop($cwd = `pwd`);
- X foreach $topdir (@_) {
- X (($topdev,$topino,$topmode,$topnlink) = stat($topdir))
- X || (warn("Can't stat $topdir: $!\n"), next);
- X if (-d _) {
- X if (chdir($topdir)) {
- XEND
- Xif ($depth) {
- X print <<'END';
- X $topdir = '' if $topdir eq '/';
- X &dodir($topdir,$topnlink);
- X ($dir,$_) = ($topdir,'.');
- X $name = $topdir;
- X &wanted;
- XEND
- X}
- Xelse {
- X print <<'END';
- X ($dir,$_) = ($topdir,'.');
- X $name = $topdir;
- X &wanted;
- X $topdir = '' if $topdir eq '/';
- X &dodir($topdir,$topnlink);
- XEND
- X}
- Xprint <<'END';
- X }
- X else {
- X warn "Can't cd to $topdir: $!\n";
- X }
- X }
- X else {
- X unless (($dir,$_) = $topdir =~ m#^(.*/)(.*)$#) {
- X ($dir,$_) = ('.', $topdir);
- X }
- X chdir $dir && &wanted;
- X }
- X chdir $cwd;
- X }
- X}
- X
- Xsub dodir {
- X local($dir,$nlink) = @_;
- X local($dev,$ino,$mode,$subcount);
- X local($name);
- X
- X # Get the list of files in the current directory.
- X
- X opendir(DIR,'.') || warn "Can't open $dir: $!\n";
- X local(@filenames) = readdir(DIR);
- X closedir(DIR);
- X
- X if ($nlink == 2) { # This dir has no subdirectories.
- X for (@filenames) {
- X next if $_ eq '.';
- X next if $_ eq '..';
- X $name = "$dir/$_";
- X &wanted;
- X }
- X }
- X else { # This dir has subdirectories.
- X $subcount = $nlink - 2;
- X for (@filenames) {
- X next if $_ eq '.';
- X next if $_ eq '..';
- X $nlink = $prune = 0;
- X $name = "$dir/$_";
- XEND
- Xprint <<'END' unless $depth;
- X &wanted;
- XEND
- Xprint <<'END';
- X if ($subcount > 0) { # Seen all the subdirs?
- X
- X # Get link count and check for directoriness.
- X
- X ($dev,$ino,$mode,$nlink) = lstat($_) unless $nlink;
- X
- X if (-d _) {
- X
- X # It really is a directory, so do it recursively.
- X
- X if (!$prune && chdir $_) {
- X &dodir($name,$nlink);
- X chdir '..';
- X }
- X --$subcount;
- X }
- X }
- XEND
- Xprint <<'END' if $depth;
- X &wanted;
- XEND
- Xprint <<'END';
- X }
- X }
- X}
- X
- XEND
- X
- Xif ($initexec) {
- X print <<'END';
- Xsub exec {
- X local($ok, @cmd) = @_;
- X foreach $word (@cmd) {
- X $word =~ s#{}#$name#g;
- X }
- X if ($ok) {
- X local($old) = select(STDOUT);
- X $| = 1;
- X print "@cmd";
- X select($old);
- X return 0 unless <STDIN> =~ /^y/;
- X }
- X chdir $cwd; # sigh
- X system @cmd;
- X chdir $dir;
- X return !$?;
- X}
- X
- XEND
- X}
- X
- Xif ($initls) {
- X print <<'END';
- Xsub ls {
- X ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$sizemm,
- X $atime,$mtime,$ctime,$blksize,$blocks) = lstat(_);
- X
- X $pname = $name;
- X
- X if (defined $blocks) {
- X $blocks = int(($blocks + 1) / 2);
- X }
- X else {
- X $blocks = int(($size + 1023) / 1024);
- X }
- X
- X if (-f _) { $perms = '-'; }
- X elsif (-d _) { $perms = 'd'; }
- X elsif (-c _) { $perms = 'c'; $sizemm = &sizemm; }
- X elsif (-b _) { $perms = 'b'; $sizemm = &sizemm; }
- X elsif (-p _) { $perms = 'p'; }
- X elsif (-S _) { $perms = 's'; }
- X else { $perms = 'l'; $pname .= ' -> ' . readlink($_); }
- X
- X $tmpmode = $mode;
- X $tmp = $rwx[$tmpmode & 7];
- X $tmpmode >>= 3;
- X $tmp = $rwx[$tmpmode & 7] . $tmp;
- X $tmpmode >>= 3;
- X $tmp = $rwx[$tmpmode & 7] . $tmp;
- X substr($tmp,2,1) =~ tr/-x/Ss/ if -u _;
- X substr($tmp,5,1) =~ tr/-x/Ss/ if -g _;
- X substr($tmp,8,1) =~ tr/-x/Tt/ if -k _;
- X $perms .= $tmp;
- X
- X $user = $user{$uid} || $uid;
- X $group = $group{$gid} || $gid;
- X
- X ($sec,$min,$hour,$mday,$mon,$year) = localtime($mtime);
- X $moname = $moname[$mon];
- X if (-M _ > 365.25 / 2) {
- X $timeyear = '19' . $year;
- X }
- X else {
- X $timeyear = sprintf("%02d:%02d", $hour, $min);
- X }
- X
- X printf "%5lu %4ld %-10s %2d %-8s %-8s %8s %s %2d %5s %s\n",
- X $ino,
- X $blocks,
- X $perms,
- X $nlink,
- X $user,
- X $group,
- X $sizemm,
- X $moname,
- X $mday,
- X $timeyear,
- X $pname;
- X 1;
- X}
- X
- Xsub sizemm {
- X sprintf("%3d, %3d", ($rdev >> 8) & 255, $rdev & 255);
- X}
- X
- XEND
- X}
- X
- Xif ($initcpio) {
- Xprint <<'END';
- Xsub cpio {
- X local($nc,$fh) = @_;
- X local($text);
- X
- X if ($name eq 'TRAILER!!!') {
- X $text = '';
- X $size = 0;
- X }
- X else {
- X ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
- X $atime,$mtime,$ctime,$blksize,$blocks) = lstat(_);
- X if (-f _) {
- X open(IN, $_) || do {
- X warn "Couldn't open $name: $!\n";
- X return;
- X };
- X }
- X else {
- X $text = readlink($_);
- X $size = 0 unless defined $text;
- X }
- X }
- X
- X ($nm = $name) =~ s#^\./##;
- X $nc{$fh} = $nc;
- X if ($nc eq 'n') {
- X $cpout{$fh} .=
- X sprintf("%06o%06o%06o%06o%06o%06o%06o%06o%011lo%06o%011lo%s\0",
- X 070707,
- X $dev & 0777777,
- X $ino & 0777777,
- X $mode & 0777777,
- X $uid & 0777777,
- X $gid & 0777777,
- X $nlink & 0777777,
- X $rdev & 0177777,
- X $mtime,
- X length($nm)+1,
- X $size,
- X $nm);
- X }
- X else {
- X $cpout{$fh} .= "\0" if length($cpout{$fh}) & 1;
- X $cpout{$fh} .= pack("SSSSSSSSLSLa*",
- X 070707, $dev, $ino, $mode, $uid, $gid, $nlink, $rdev, $mtime,
- X length($nm)+1, $size, $nm . (length($nm) & 1 ? "\0" : "\0\0"));
- X }
- X if ($text ne '') {
- X $cpout{$fh} .= $text;
- X }
- X elsif ($size) {
- X &flush($fh) while ($l = length($cpout{$fh})) >= 5120;
- X while (sysread(IN, $cpout{$fh}, 5120 - $l, $l)) {
- X &flush($fh);
- X $l = length($cpout{$fh});
- X }
- X }
- X close IN;
- X}
- X
- Xsub flush {
- X local($fh) = @_;
- X
- X while (length($cpout{$fh}) >= 5120) {
- X syswrite($fh,$cpout{$fh},5120);
- X ++$blocks{$fh};
- X substr($cpout{$fh}, 0, 5120) = '';
- X }
- X}
- X
- Xsub flushall {
- X $name = 'TRAILER!!!';
- X foreach $fh (keys %cpout) {
- X &cpio($nc{$fh},$fh);
- X $cpout{$fh} .= "0" x (5120 - length($cpout{$fh}));
- X &flush($fh);
- X print $blocks{$fh} * 10, " blocks\n";
- X }
- X}
- X
- XEND
- X}
- X
- Xif ($inittar) {
- Xprint <<'END';
- Xsub tar {
- X local($fh) = @_;
- X local($linkname,$header,$l,$slop);
- X local($linkflag) = "\0";
- X
- X ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
- X $atime,$mtime,$ctime,$blksize,$blocks) = lstat(_);
- X $nm = $name;
- X if ($nlink > 1) {
- X if ($linkname = $linkseen{$fh,$dev,$ino}) {
- X $linkflag = 1;
- X }
- X else {
- X $linkseen{$fh,$dev,$ino} = $nm;
- X }
- X }
- X if (-f _) {
- X open(IN, $_) || do {
- X warn "Couldn't open $name: $!\n";
- X return;
- X };
- X $size = 0 if $linkflag ne "\0";
- X }
- X else {
- X $linkname = readlink($_);
- X $linkflag = 2 if defined $linkname;
- X $nm .= '/' if -d _;
- X $size = 0;
- X }
- X
- X $header = pack("a100a8a8a8a12a12a8a1a100",
- X $nm,
- X sprintf("%6o ", $mode & 0777),
- X sprintf("%6o ", $uid & 0777777),
- X sprintf("%6o ", $gid & 0777777),
- X sprintf("%11o ", $size),
- X sprintf("%11o ", $mtime),
- X " ",
- X $linkflag,
- X $linkname);
- X $l = length($header) % 512;
- X substr($header, 148, 6) = sprintf("%6o", unpack("%16C*", $header));
- X substr($header, 154, 1) = "\0"; # blech
- X $tarout{$fh} .= $header;
- X $tarout{$fh} .= "\0" x (512 - $l) if $l;
- X if ($size) {
- X &tflush($fh) while ($l = length($tarout{$fh})) >= 10240;
- X while (sysread(IN, $tarout{$fh}, 10240 - $l, $l)) {
- X $slop = length($tarout{$fh}) % 512;
- X $tarout{$fh} .= "\0" x (512 - $slop) if $slop;
- X &tflush($fh);
- X $l = length($tarout{$fh});
- X }
- X }
- X close IN;
- X}
- X
- Xsub tflush {
- X local($fh) = @_;
- X
- X while (length($tarout{$fh}) >= 10240) {
- X syswrite($fh,$tarout{$fh},10240);
- X ++$blocks{$fh};
- X substr($tarout{$fh}, 0, 10240) = '';
- X }
- X}
- X
- Xsub tflushall {
- X local($len);
- X
- X foreach $fh (keys %tarout) {
- X $len = 10240 - length($tarout{$fh});
- X $len += 10240 if $len < 1024;
- X $tarout{$fh} .= "\0" x $len;
- X &tflush($fh);
- X }
- X}
- X
- XEND
- X}
- X
- Xexit;
- X
- X############################################################################
- X
- Xsub tab {
- X local($tabstring);
- X
- X $tabstring = "\t" x ($indent / 2) . ' ' x ($indent % 2 * 4);
- X if ($_ !~ /^(name|print)/) {
- X if (!$statdone) {
- X $tabstring .= <<'ENDOFSTAT' . $tabstring;
- X(($dev,$ino,$mode,$nlink,$uid,$gid) = lstat($_)) &&
- XENDOFSTAT
- X $statdone = 1;
- X }
- X }
- X $tabstring =~ s/^\s+/ / if $out =~ /!$/;
- X $tabstring;
- X}
- X
- Xsub fileglob_to_re {
- X local($tmp) = @_;
- X
- X $tmp =~ s/([.^\$()])/\\$1/g;
- X $tmp =~ s/([?*])/.$1/g;
- X "^$tmp$";
- X}
- X
- Xsub n {
- X local($n) = @_;
- X
- X $n =~ s/^-0*/< / || $n =~ s/^\+0*/> / || $n =~ s/^0*/== /;
- X $n;
- X}
- X
- Xsub quote {
- X local($string) = @_;
- X $string =~ s/'/\\'/;
- X "'$string'";
- X}
- !STUFFY!FUNK!
- echo ""
- echo "End of kit"
- : I do not append .signature, but someone might mail this.
- exit
-
-