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Diffstat (limited to 'win32/bin/search.bat')
| -rw-r--r-- | win32/bin/search.bat | 1873 |
1 files changed, 1873 insertions, 0 deletions
diff --git a/win32/bin/search.bat b/win32/bin/search.bat new file mode 100644 index 0000000000..0bb123759f --- /dev/null +++ b/win32/bin/search.bat @@ -0,0 +1,1873 @@ +@rem = '--*-Perl-*--'; +@rem = ' +@echo off +perl -S %0.bat %1 %2 %3 %4 %5 %6 %7 %8 %9 +goto endofperl +@rem '; +#!/usr/local/bin/perl -w +'di'; +'ig00'; +############################################################################## +## +## search +## +## Jeffrey Friedl (jfriedl@omron.co.jp), Dec 1994. +## Copyright 19.... ah hell, just take it. +## +## BLURB: +## A combo of find and grep -- more or less do a 'grep' on a whole +## directory tree. Fast, with lots of options. Much more powerful than +## the simple "find ... | xargs grep ....". Has a full man page. +## Powerfully customizable. +## +## This file is big, but mostly comments and man page. +## +## See man page for usage info. +## Return value: 2=error, 1=nothing found, 0=something found. +## + +$version = "950918.5"; +## +## "950918.5"; +## Changed all 'sysread' to 'read' because Linux perl's don't seem +## to like sysread() +## +## "941227.4"; +## Added -n, -u +## +## "941222.3" +## Added -nice (due to Lionel Cons <Lionel.Cons@cern.ch>) +## Removed any leading "./" from name. +## Added default flags for ~/.search, including TTY, -nice, -list, etc. +## Program name now has path removed when printed in diagnostics. +## Added simple tilde-expansion to -dir arg. +## Added -dskip, etc. Fixed -iregex bug. +## Changed -dir to be additive, adding -ddir. +## Now screen out devices, pipes, and sockets. +## More tidying and lots of expanding of the man page +## +## +## "941217.2"; +## initial release. + +$stripped=0; + +&init; +$rc_file = join('/', $ENV{'HOME'}, ".search"); + +&check_args; + +## Make sure we've got a regex. +## Don't need one if -find or -showrc was specified. +$!=2, die "expecting regex arguments.\n" + if $FIND_ONLY == 0 && $showrc == 0 && @ARGV == 0; + +&prepare_to_search($rc_file); + +&import_program if !defined &dodir; ## BIG key to speed. + +## do search while there are directories to be done. +&dodir(shift(@todo)) while @todo; + +&clear_message if $VERBOSE && $STDERR_IS_TTY; +exit($retval); +############################################################################### + +sub init +{ + ## initialize variables that might be reset by command-line args + $DOREP=0; ## set true by -dorep (redo multi-hardlink files) + $DO_SORT=0; ## set by -sort (sort files in a dir before checking) + $FIND_ONLY=0; ## set by -find (don't search files) + $LIST_ONLY=0; ## set true by -l (list filenames only) + $NEWER=0; ## set by -newer, "-mtime -###" + $NICE=0; ## set by -nice (print human-readable output) + $NOLINKS=0; ## set true by -nolinks (don't follow symlinks) + $OLDER=0; ## set by -older, "-mtime ###" + $PREPEND_FILENAME=1; ## set false by -h (don't prefix lines with filename) + $REPORT_LINENUM=0; ## set true by -n (show line numbers) + $VERBOSE=0; ## set to a value by -v, -vv, etc. (verbose messages) + $WHY=0; ## set true by -why, -vvv+ (report why skipped) + $XDEV=0; ## set true by -xdev (stay on one filesystem) + $all=0; ## set true by -all (don't skip many kinds of files) + $iflag = ''; ## set to 'i' by -i (ignore case); + $norc=0; ## set by -norc (don't load rc file) + $showrc=0; ## set by -showrc (show what happens with rc file) + $underlineOK=0; ## set true by -u (watch for underline stuff) + $words=0; ## set true by -w (match whole-words only) + $DELAY=0; ## inter-file delay (seconds) + $retval=1; ## will set to 0 if we find anything. + + ## various elements of stat() that we might access + $STAT_DEV = 1; + $STAT_INODE = 2; + $STAT_MTIME = 9; + + $VV_PRINT_COUNT = 50; ## with -vv, print every VV_PRINT_COUNT files, or... + $VV_SIZE = 1024*1024; ## ...every VV_SIZE bytes searched + $vv_print = $vv_size = 0; ## running totals. + + ## set default options, in case the rc file wants them + $opt{'TTY'}= 1 if -t STDOUT; + + ## want to know this for debugging message stuff + $STDERR_IS_TTY = -t STDERR ? 1 : 0; + $STDERR_SCREWS_STDOUT = ($STDERR_IS_TTY && -t STDOUT) ? 1 : 0; + + $0 =~ s,.*/,,; ## clean up $0 for any diagnostics we'll be printing. +} + +## +## Check arguments. +## +sub check_args +{ + while (@ARGV && $ARGV[0] =~ m/^-/) + { + $arg = shift(@ARGV); + + if ($arg eq '-version' || ($VERBOSE && $arg eq '-help')) { + print qq/Jeffrey's file search, version "$version".\n/; + exit(0) unless $arg eq '-help'; + } + if ($arg eq '-help') { + print <<INLINE_LITERAL_TEXT; +usage: $0 [options] [-e] [PerlRegex ....] +OPTIONS TELLING *WHERE* TO SEARCH: + -dir DIR start search at the named directory (default is current dir). + -xdev stay on starting file system. + -sort sort the files in each directory before processing. + -nolinks don't follow symbolic links. +OPTIONS TELLING WHICH FILES TO EVEN CONSIDER: + -mtime # consider files modified > # days ago (-# for < # days old) + -newer FILE consider files modified more recently than FILE (also -older) + -name GLOB consider files whose name matches pattern (also -regex). + -skip GLOB opposite of -name: identifies files to not consider. + -path GLOB like -name, but for files whose whole path is described. + -dpath/-dregex/-dskip versions for selecting or pruning directories. + -all don't skip any files marked to be skipped by the startup file. + -x<SPECIAL> (see manual, and/or try -showrc). + -why report why a file isn't checked (also implied by -vvvv). +OPTIONS TELLING WHAT TO DO WITH FILES THAT WILL BE CONSIDERED: + -f | -find just list files (PerlRegex ignored). Default is to grep them. + -ff | -ffind Does a faster -find (implies -find -all -dorep) +OPTIONS CONTROLLING HOW THE SEARCH IS DONE (AND WHAT IS PRINTED): + -l | -list only list files with matches, not the lines themselves. + -nice | -nnice print more "human readable" output. + -n prefix each output line with its line number in the file. + -h don't prefix output lines with file name. + -u also look "inside" manpage-style underlined text + -i do case-insensitive searching. + -w match words only (as defined by perl's \\b). +OTHER OPTIONS: + -v, -vv, -vvv various levels of message verbosity. + -e end of options (in case a regex looks like an option). + -showrc show what the rc file sets, then exit. + -norc don't load the rc file. + -dorep check files with multiple hard links multiple times. +INLINE_LITERAL_TEXT + print "Use -v -help for more verbose help.\n" unless $VERBOSE; + print "This script file is also a man page.\n" unless $stripped; + print <<INLINE_LITERAL_TEXT if $VERBOSE; + +If -f (or -find) given, PerlRegex is optional and ignored. +Otherwise, will search for files with lines matching any of the given regexes. + +Combining things like -name and -mtime implies boolean AND. +However, duplicating things (such as -name '*.c' -name '*.txt') implies OR. + +-mtime may be given floating point (i.e. 1.5 is a day and a half). +-iskip/-idskip/-ipath/... etc are case-insensitive versions. + +If any letter in -newer/-older is upper case, "or equal" is +inserted into the test. + +You can always find the latest version on the World Wide Web in + http://www.wg.omron.co.jp/~jfriedl/perl/ +INLINE_LITERAL_TEXT + exit(0); + } + $DOREP=1, next if $arg eq '-dorep'; ## do repeats + $DO_SORT=1, next if $arg eq '-sort'; ## sort files + $NOLINKS=1, next if $arg eq '-nolinks'; ## no sym. links + $PREPEND_FILENAME=0, next if $arg eq '-h'; ## no filename prefix + $REPORT_LINENUM=1, next if $arg eq '-n'; ## show line numbers + $WHY=1, next if $arg eq '-why'; ## tell why skipped + $XDEV=1, next if $arg eq '-xdev'; ## don't leave F.S. + $all=1,$opt{'-all'}=1,next if $arg eq '-all'; ## don't skip *.Z, etc + $iflag='i', next if $arg eq '-i'; ## ignore case + $norc=1, next if $arg eq '-norc'; ## don't load rc file + $showrc=1, next if $arg eq '-showrc'; ## show rc file + $underlineOK=1, next if $arg eq '-u'; ## look throuh underln. + $words=1, next if $arg eq '-w'; ## match "words" only + &strip if $arg eq '-strip'; ## dump this program + last if $arg eq '-e'; + $DELAY=$1, next if $arg =~ m/-delay(\d+)/; + + $FIND_ONLY=1, next if $arg =~/^-f(ind)?$/;## do "find" only + + $FIND_ONLY=1, $DOREP=1, $all=1, + next if $arg =~/^-ff(ind)?$/;## fast -find + $LIST_ONLY=1,$opt{'-list'}=1, + next if $arg =~/^-l(ist)?$/;## only list files + + if ($arg =~ m/^-(v+)$/) { ## verbosity + $VERBOSE =length($1); + foreach $len (1..$VERBOSE) { $opt{'-'.('v' x $len)}=1 } + next; + } + if ($arg =~ m/^-(n+)ice$/) { ## "nice" output + $NICE =length($1); + foreach $len (1..$NICE) { $opt{'-'.('n' x $len).'ice'}=1 } + next; + } + + if ($arg =~ m/^-(i?)(d?)skip$/) { + local($i) = $1 eq 'i'; + local($d) = $2 eq 'd'; + $! = 2, die qq/$0: expecting glob arg to -$arg\n/ unless @ARGV; + foreach (split(/\s+/, shift @ARGV)) { + if ($d) { + $idskip{$_}=1 if $i; + $dskip{$_}=1; + } else { + $iskip{$_}=1 if $i; + $skip{$_}=1; + } + } + next; + } + + + if ($arg =~ m/^-(i?)(d?)(regex|path|name)$/) { + local($i) = $1 eq 'i'; + $! = 2, die qq/$0: expecting arg to -$arg\n/ unless @ARGV; + foreach (split(/\s+/, shift @ARGV)) { + $iname{join(',', $arg, $_)}=1 if $i; + $name{join(',', $arg, $_)}=1; + } + next; + } + + if ($arg =~ m/^-d?dir$/) { + $opt{'-dir'}=1; + $! = 2, die qq/$0: expecting filename arg to -$arg\n/ unless @ARGV; + $start = shift(@ARGV); + $start =~ s#^~(/+|$)#$ENV{'HOME'}$1# if defined $ENV{'HOME'}; + $! = 2, die qq/$0: can't find ${arg}'s "$start"\n/ unless -e $start; + $! = 2, die qq/$0: ${arg}'s "$start" not a directory.\n/ unless -d _; + undef(@todo), $opt{'-ddir'}=1 if $arg eq '-ddir'; + push(@todo, $start); + next; + } + + if ($arg =~ m/^-(new|old)er$/i) { + $! = 2, die "$0: expecting filename arg to -$arg\n" unless @ARGV; + local($file, $time) = shift(@ARGV); + $! = 2, die qq/$0: can't stat -${arg}'s "$file"./ + unless $time = (stat($file))[$STAT_MTIME]; + local($upper) = $arg =~ tr/A-Z//; + if ($arg =~ m/new/i) { + $time++ unless $upper; + $NEWER = $time if $NEWER < $time; + } else { + $time-- unless $upper; + $OLDER = $time if $OLDER == 0 || $OLDER > $time; + } + next; + } + + if ($arg =~ m/-mtime/) { + $! = 2, die "$0: expecting numerical arg to -$arg\n" unless @ARGV; + local($days) = shift(@ARGV); + $! = 2, die qq/$0: inappropriate arg ($days) to $arg\n/ if $days==0; + $days *= 3600 * 24; + if ($days < 0) { + local($time) = $^T + $days; + $NEWER = $time if $NEWER < $time; + } else { + local($time) = $^T - $days; + $OLDER = $time if $OLDER == 0 || $OLDER > $time; + } + next; + } + + ## special user options + if ($arg =~ m/^-x(.+)/) { + foreach (split(/[\s,]+/, $1)) { $user_opt{$_} = $opt{$_}= 1; } + next; + } + + $! = 2, die "$0: unknown arg [$arg]\n"; + } +} + +## +## Given a filename glob, return a regex. +## If the glob has no globbing chars (no * ? or [..]), then +## prepend an effective '*' to it. +## +sub glob_to_regex +{ + local($glob) = @_; + local(@parts) = $glob =~ m/\\.|[*?]|\[]?[^]]*]|[^[\\*?]+/g; + local($trueglob)=0; + foreach (@parts) { + if ($_ eq '*' || $_ eq '?') { + $_ = ".$_"; + $trueglob=1; ## * and ? are a real glob + } elsif (substr($_, 0, 1) eq '[') { + $trueglob=1; ## [..] is a real glob + } else { + s/^\\//; ## remove any leading backslash; + s/\W/\\$&/g; ## now quote anything dangerous; + } + } + unshift(@parts, '.*') unless $trueglob; + join('', '^', @parts, '$'); +} + +sub prepare_to_search +{ + local($rc_file) = @_; + + $HEADER_BYTES=0; ## Might be set nonzero in &read_rc; + $last_message_length = 0; ## For &message and &clear_message. + + &read_rc($rc_file, $showrc) unless $norc; + exit(0) if $showrc; + + $NEXT_DIR_ENTRY = $DO_SORT ? 'shift @files' : 'readdir(DIR)'; + $WHY = 1 if $VERBOSE > 3; ## Arg -vvvv or above implies -why. + @todo = ('.') if @todo == 0; ## Where we'll start looking + + ## see if any user options were specified that weren't accounted for + foreach $opt (keys %user_opt) { + next if defined $seen_opt{$opt}; + warn "warning: -x$opt never considered.\n"; + } + + die "$0: multiple time constraints exclude all possible files.\n" + if ($NEWER && $OLDER) && ($NEWER > $OLDER); + + ## + ## Process any -skip/-iskip args that had been given + ## + local(@skip_test); + foreach $glob (keys %skip) { + $i = defined($iskip{$glob}) ? 'i': ''; + push(@skip_test, '$name =~ m/'. &glob_to_regex($glob). "/$i"); + } + if (@skip_test) { + $SKIP_TEST = join('||',@skip_test); + $DO_SKIP_TEST = 1; + } else { + $DO_SKIP_TEST = $SKIP_TEST = 0; + } + + ## + ## Process any -dskip/-idskip args that had been given + ## + local(@dskip_test); + foreach $glob (keys %dskip) { + $i = defined($idskip{$glob}) ? 'i': ''; + push(@dskip_test, '$name =~ m/'. &glob_to_regex($glob). "/$i"); + } + if (@dskip_test) { + $DSKIP_TEST = join('||',@dskip_test); + $DO_DSKIP_TEST = 1; + } else { + $DO_DSKIP_TEST = $DSKIP_TEST = 0; + } + + + ## + ## Process any -name, -path, -regex, etc. args that had been given. + ## + undef @name_test; + undef @dname_test; + foreach $key (keys %name) { + local($type, $pat) = split(/,/, $key, 2); + local($i) = defined($iname{$key}) ? 'i' : ''; + if ($type =~ /regex/) { + $pat =~ s/!/\\!/g; + $test = "\$name =~ m!^$pat\$!$i"; + } else { + local($var) = $type eq 'name' ? '$name' : '$file'; + $test = "$var =~ m/". &glob_to_regex($pat). "/$i"; + } + if ($type =~ m/^-i?d/) { + push(@dname_test, $test); + } else { + push(@name_test, $test); + } + } + if (@name_test) { + $GLOB_TESTS = join('||', @name_test); + + $DO_GLOB_TESTS = 1; + } else { + $GLOB_TESTS = $DO_GLOB_TESTS = 0; + } + if (@dname_test) { + $DGLOB_TESTS = join('||', @dname_test); + $DO_DGLOB_TESTS = 1; + } else { + $DGLOB_TESTS = $DO_DGLOB_TESTS = 0; + } + + + ## + ## Process any 'magic' things from the startup file. + ## + if (@magic_tests && $HEADER_BYTES) { + ## the $magic' one is for when &dodir is not inlined + $tests = join('||',@magic_tests); + $MAGIC_TESTS = " { package magic; \$val = ($tests) }"; + $DO_MAGIC_TESTS = 1; + } else { + $MAGIC_TESTS = 1; + $DO_MAGIC_TESTS = 0; + } + + ## + ## Prepare regular expressions. + ## + { + local(@regex_tests); + + if ($LIST_ONLY) { + $mflag = ''; + ## need to have $* set, but perl5 just won''t shut up about it. + if ($] >= 5) { + $mflag = 'm'; + } else { + eval ' $* = 1 '; + } + } + + ## + ## Until I figure out a better way to deal with it, + ## We have to worry about a regex like [^xyz] when doing $LIST_ONLY. + ## Such a regex *will* match \n, and if I'm pulling in multiple + ## lines, it can allow lines to match that would otherwise not match. + ## + ## Therefore, if there is a '[^' in a regex, we can NOT take a chance + ## an use the fast listonly. + ## + $CAN_USE_FAST_LISTONLY = $LIST_ONLY; + + local(@extra); + local($underline_glue) = ($] >= 5) ? '(:?_\cH)?' : '(_\cH)?'; + while (@ARGV) { + $regex = shift(@ARGV); + ## + ## If watching for underlined things too, add another regex. + ## + if ($underlineOK) { + if ($regex =~ m/[?*+{}()\\.|^\$[]/) { + warn "$0: warning, can't underline-safe ``$regex''.\n"; + } else { + $regex = join($underline_glue, split(//, $regex)); + } + } + + ## If nothing special in the regex, just use index... + ## is quite a bit faster. + if (($iflag eq '') && ($words == 0) && + $regex !~ m/[?*+{}()\\.|^\$[]/) + { + push(@regex_tests, "(index(\$_, q+$regex+)>=0)"); + + } else { + $regex =~ s#[\$\@\/]\w#\\$&#; + if ($words) { + if ($regex =~ m/\|/) { + ## could be dangerous -- see if we can wrap in parens. + if ($regex =~ m/\\\d/) { + warn "warning: -w and a | in a regex is dangerous.\n" + } else { + $regex = join($regex, '(', ')'); + } + } + $regex = join($regex, '\b', '\b'); + } + $CAN_USE_FAST_LISTONLY = 0 if substr($regex, "[^") >= 0; + push(@regex_tests, "m/$regex/$iflag$mflag"); + } + + ## If we're done, but still have @extra to do, get set for that. + if (@ARGV == 0 && @extra) { + @ARGV = @extra; ## now deal with the extra stuff. + $underlineOK = 0; ## but no more of this. + undef @extra; ## or this. + } + } + if (@regex_tests) { + $REGEX_TEST = join('||', @regex_tests); + ## print STDERR $REGEX_TEST, "\n"; exit; + } else { + ## must be doing -find -- just give something syntactically correct. + $REGEX_TEST = 1; + } + } + + ## + ## Make sure we can read the first item(s). + ## + foreach $start (@todo) { + $! = 2, die qq/$0: can't stat "$start"\n/ + unless ($dev,$inode) = (stat($start))[$STAT_DEV,$STAT_INODE]; + + if (defined $dir_done{"$dev,$inode"}) { + ## ignore the repeat. + warn(qq/ignoring "$start" (same as "$dir_done{"$dev,$inode"}").\n/) + if $VERBOSE; + next; + } + + ## if -xdev was given, remember the device. + $xdev{$dev} = 1 if $XDEV; + + ## Note that we won't want to do it again + $dir_done{"$dev,$inode"} = $start; + } +} + + +## +## See the comment above the __END__ above the 'sub dodir' below. +## +sub import_program +{ + sub bad { + print STDERR "$0: internal error (@_)\n"; + exit 2; + } + + ## Read from data, up to next __END__. This will be &dodir. + local($/) = "\n__END__"; + $prog = <DATA>; + close(DATA); + + $prog =~ s/\beval\b//g; ## remove any 'eval' + + ## Inline uppercase $-variables by their current values. + if ($] >= 5) { + $prog =~ s/\$([A-Z][A-Z0-9_]{2,}\b)/ + &bad($1) if !defined ${$main::{$1}}; ${$main::{$1}};/eg; + } else { + $prog =~ s/\$([A-Z][A-Z0-9_]{2,}\b)/local(*VAR) = $_main{$1}; + &bad($1) if !defined $VAR; $VAR;/eg; + } + + eval $prog; ## now do it. This will define &dodir; + $!=2, die "$0 internal error: $@\n" if $@; +} + +########################################################################### + +## +## Read the .search file: +## Blank lines and lines that are only #-comments ignored. +## Newlines may be escaped to create long lines +## Other lines are directives. +## +## A directive may begin with an optional tag in the form <...> +## Things inside the <...> are evaluated as with: +## <(this || that) && must> +## will be true if +## -xmust -xthis or -xmust -xthat +## were specified on the command line (order doesn't matter, though) +## A directive is not done if there is a tag and it's false. +## Any characters but whitespace and &|()>,! may appear after an -x +## (although "-xdev" is special). -xmust,this is the same as -xmust -xthis. +## Something like -x~ would make <~> true, and <!~> false. +## +## Directives are in the form: +## option: STRING +## magic : NUMBYTES : EXPR +## +## With option: +## The STRING is parsed like a Bourne shell command line, and the +## options are used as if given on the command line. +## No comments are allowed on 'option' lines. +## Examples: +## # skip objects and libraries +## option: -skip '.o .a' +## # skip emacs *~ and *# files, unless -x~ given: +## <!~> option: -skip '~ #' +## +## With magic: +## EXPR can be pretty much any perl (comments allowed!). +## If it evaluates to true for any particular file, it is skipped. +## The only info you'll have about a file is the variable $H, which +## will have at least the first NUMBYTES of the file (less if the file +## is shorter than that, of course, and maybe more). You'll also have +## any variables you set in previous 'magic' lines. +## Examples: +## magic: 6 : ($x6 = substr($H, 0, 6)) eq 'GIF87a' +## magic: 6 : $x6 eq 'GIF89a' +## +## magic: 6 : (($x6 = substr($H, 0, 6)) eq 'GIF87a' ## old gif \ +## || $x6 eq 'GIF89a' ## new gif +## (the above two sets are the same) +## ## Check the first 32 bytes for "binarish" looking bytes. +## ## Don't blindly dump on any high-bit set, as non-ASCII text +## ## often has them set. \x80 and \xff seem to be special, though. +## ## Require two in a row to not get things like perl's $^T. +## ## This is known to get *.Z, *.gz, pkzip, *.elc and about any +## ## executable you'll find. +## magic: 32 : $H =~ m/[\x00-\x06\x10-\x1a\x1c-\x1f\x80\xff]{2}/ +## +sub read_rc +{ + local($file, $show) = @_; + local($line_num, $ln, $tag) = 0; + local($use_default, @default) = 0; + + { package magic; $ = 0; } ## turn off warnings for when we run EXPR's + + unless (open(RC, "$file")) { + $use_default=1; + $file = "<internal default startup file>"; + ## no RC file -- use this default. + @default = split(/\n/,<<'--------INLINE_LITERAL_TEXT'); + magic: 32 : $H =~ m/[\x00-\x06\x10-\x1a\x1c-\x1f\x80\xff]{2}/ + option: -skip '.a .COM .elc .EXE .gz .o .pbm .xbm .dvi' + option: -iskip '.tarz .zip .z .lzh .jpg .jpeg .gif .uu' + <!~> option: -skip '~ #' +--------INLINE_LITERAL_TEXT + } + + ## + ## Make an eval error pretty. + ## + sub clean_eval_error { + local($_) = @_; + s/ in file \(eval\) at line \d+,//g; ## perl4-style error + s/ at \(eval \d+\) line \d+,//g; ## perl5-style error + $_ = $` if m/\n/; ## remove all but first line + "$_\n"; + } + + print "reading RC file: $file\n" if $show; + + while ($_ = ($use_default ? shift(@default) : <RC>)) { + $ln = ++$line_num; ## note starting line num. + $_ .= <RC>, $line_num++ while s/\\\n?$/\n/; ## allow continuations + next if /^\s*(#.*)?$/; ## skip blank or comment-only lines. + $do = ''; + + ## look for an initial <...> tag. + if (s/^\s*<([^>]*)>//) { + ## This simple s// will make the tag ready to eval. + ($tag = $msg = $1) =~ + s/[^\s&|(!)]+/ + $seen_opt{$&}=1; ## note seen option + "defined(\$opt{q>$&>})" ## (q>> is safe quoting here) + /eg; + + ## see if the tag is true or not, abort this line if not. + $dothis = (eval $tag); + $!=2, die "$file $ln <$msg>: $_".&clean_eval_error($@) if $@; + + if ($show) { + $msg =~ s/[^\s&|(!)]+/-x$&/; + $msg =~ s/\s*!\s*/ no /g; + $msg =~ s/\s*&&\s*/ and /g; + $msg =~ s/\s*\|\|\s*/ or /g; + $msg =~ s/^\s+//; $msg =~ s/\s+$//; + $do = $dothis ? "(doing because $msg)" : + "(do if $msg)"; + } elsif (!$dothis) { + next; + } + } + + if (m/^\s*option\s*:\s*/) { + next if $all && !$show; ## -all turns off these checks; + local($_) = $'; + s/\n$//; + local($orig) = $_; + print " $do option: $_\n" if $show; + local($0) = "$0 ($file)"; ## for any error message. + local(@ARGV); + local($this); + ## + ## Parse $_ as a Bourne shell line -- fill @ARGV + ## + while (length) { + if (s/^\s+//) { + push(@ARGV, $this) if defined $this; + undef $this; + next; + } + $this = '' if !defined $this; + $this .= $1 while s/^'([^']*)'// || + s/^"([^"]*)"// || + s/^([^'"\s\\]+)//|| + s/^(\\[\D\d])//; + die "$file $ln: error parsing $orig at $_\n" if m/^\S/; + } + push(@ARGV, $this) if defined $this; + &check_args; + die qq/$file $ln: unused arg "@ARGV".\n/ if @ARGV; + next; + } + + if (m/^\s*magic\s*:\s*(\d+)\s*:\s*/) { + next if $all && !$show; ## -all turns off these checks; + local($bytes, $check) = ($1, $'); + + if ($show) { + $check =~ s/\n?$/\n/; + print " $do contents: $check"; + } + ## Check to make sure the thing at least compiles. + eval "package magic; (\$H = '1'x \$main'bytes) && (\n$check\n)\n"; + $! = 2, die "$file $ln: ".&clean_eval_error($@) if $@; + + $HEADER_BYTES = $bytes if $bytes > $HEADER_BYTES; + push(@magic_tests, "(\n$check\n)"); + next; + } + $! = 2, die "$file $ln: unknown command\n"; + } + close(RC); +} + +sub message +{ + if (!$STDERR_IS_TTY) { + print STDERR $_[0], "\n"; + } else { + local($text) = @_; + $thislength = length($text); + if ($thislength >= $last_message_length) { + print STDERR $text, "\r"; + } else { + print STDERR $text, ' 'x ($last_message_length-$thislength),"\r"; + } + $last_message_length = $thislength; + } +} + +sub clear_message +{ + print STDERR ' ' x $last_message_length, "\r" if $last_message_length; + $vv_print = $vv_size = $last_message_length = 0; +} + +## +## Output a copy of this program with comments, extra whitespace, and +## the trailing man page removed. On an ultra slow machine, such a copy +## might load faster (but I can't tell any difference on my machine). +## +sub strip { + seek(DATA, 0, 0) || die "$0: can't reset internal pointer.\n"; + while(<DATA>) { + print, next if /INLINE_LITERAL_TEXT/.../INLINE_LITERAL_TEXT/; + ## must mention INLINE_LITERAL_TEXT on this line! + s/\#\#.*|^\s+|\s+$//; ## remove cruft + last if $_ eq '.00;'; + next if ($_ eq '') || ($_ eq "'di'") || ($_ eq "'ig00'"); + s/\$stripped=0;/\$stripped=1;/; + s/\s\s+/ /; ## squish multiple whitespaces down to one. + print $_, "\n"; + } + exit(0); +} + +## +## Just to shut up -w. Never executed. +## +sub dummy { + + 1 || &dummy || &dir_done || &bad || &message || $NEXT_DIR_ENTRY || + $DELAY || $VV_SIZE || $VV_PRINT_COUNT || $STDERR_SCREWS_STDOUT || + @files || @files || $magic'H || $magic'H || $xdev{''} || &clear_message; + +} + +## +## If the following __END__ is in place, what follows will be +## inlined when the program first starts up. Any $ variable name +## all in upper case, specifically, any string matching +## \$([A-Z][A-Z0-9_]{2,}\b +## will have the true value for that variable inlined. Also, any 'eval' is +## removed +## +## The idea is that when the whole thing is then eval'ed to define &dodir, +## the perl optimizer will make all the decisions that are based upon +## command-line options (such as $VERBOSE), since they'll be inlined as +## constants +## +## Also, and here's the big win, the tests for matching the regex, and a +## few others, are all inlined. Should be blinding speed here. +## +## See the read from <DATA> above for where all this takes place. +## But all-in-all, you *want* the __END__ here. Comment it out only for +## debugging.... +## + +__END__ + +## +## Given a directory, check all "appropriate" files in it. +## Shove any subdirectories into the global @todo, so they'll be done +## later. +## +## Be careful about adding any upper-case variables, as they are subject +## to being inlined. See comments above the __END__ above. +## +sub dodir +{ + local($dir) = @_; + $dir =~ s,/+$,,; ## remove any trailing slash. + unless (opendir(DIR, "$dir/.")) { + &clear_message if $VERBOSE && $STDERR_SCREWS_STDOUT; + warn qq($0: can't opendir "$dir/".\n); + return; + } + + if ($VERBOSE) { + &message($dir); + $vv_print = $vv_size = 0; + } + + @files = sort readdir(DIR) if $DO_SORT; + + while (defined($name = eval $NEXT_DIR_ENTRY)) + { + next if $name eq '.' || $name eq '..'; ## never follow these. + + ## create full relative pathname. + $file = $dir eq '.' ? $name : "$dir/$name"; + + ## if link and skipping them, do so. + if ($NOLINKS && -l $file) { + warn qq/skip (symlink): $file\n/ if $WHY; + next; + } + + ## skip things unless files or directories + unless (-f $file || -d _) { + if ($WHY) { + $why = (-S _ && "socket") || + (-p _ && "pipe") || + (-b _ && "block special")|| + (-c _ && "char special") || "somekinda special"; + warn qq/skip ($why): $file\n/; + } + next; + } + + ## skip things we can't read + unless (-r _) { + if ($WHY) { + $why = (-l $file) ? "follow" : "read"; + warn qq/skip (can't $why): $file\n/; + } + next; + } + + ## skip things that are empty + unless (-s _) { + warn qq/skip (empty): $file\n/ if $WHY; + next; + } + + ## Note file device & inode. If -xdev, skip if appropriate. + ($dev, $inode) = (stat(_))[$STAT_DEV, $STAT_INODE]; + if ($XDEV && defined $xdev{$dev}) { + warn qq/skip (other device): $file\n/ if $WHY; + next; + } + $id = "$dev,$inode"; + + ## special work for a directory + if (-d _) { + ## Do checks for directory file endings. + if ($DO_DSKIP_TEST && (eval $DSKIP_TEST)) { + warn qq/skip (-dskip): $file\n/ if $WHY; + next; + } + ## do checks for -name/-regex/-path tests + if ($DO_DGLOB_TESTS && !(eval $DGLOB_TESTS)) { + warn qq/skip (dirname): $file\n/ if $WHY; + next; + } + + ## _never_ redo a directory + if (defined $dir_done{$id}) { + warn qq/skip (did as "$dir_done{$id}"): $file\n/ if $WHY; + next; + } + $dir_done{$id} = $file; ## mark it done. + unshift(@todo, $file); ## add to the list to do. + next; + } + if ($WHY == 0 && $VERBOSE > 1) { + if ($VERBOSE>2||$vv_print++>$VV_PRINT_COUNT||($vv_size+=-s _)>$VV_SIZE){ + &message($file); + $vv_print = $vv_size = 0; + } + } + + ## do time-related tests + if ($NEWER || $OLDER) { + $_ = (stat(_))[$STAT_MTIME]; + if ($NEWER && $_ < $NEWER) { + warn qq/skip (too old): $file\n/ if $WHY; + next; + } + if ($OLDER && $_ > $OLDER) { + warn qq/skip (too new): $file\n/ if $WHY; + next; + } + } + + ## do checks for file endings + if ($DO_SKIP_TEST && (eval $SKIP_TEST)) { + warn qq/skip (-skip): $file\n/ if $WHY; + next; + } + + ## do checks for -name/-regex/-path tests + if ($DO_GLOB_TESTS && !(eval $GLOB_TESTS)) { + warn qq/skip (filename): $file\n/ if $WHY; + next; + } + + + ## If we're not repeating files, + ## skip this one if we've done it, or note we're doing it. + unless ($DOREP) { + if (defined $file_done{$id}) { + warn qq/skip (did as "$file_done{$id}"): $file\n/ if $WHY; + next; + } + $file_done{$id} = $file; + } + + if ($DO_MAGIC_TESTS) { + if (!open(FILE_IN, $file)) { + &clear_message if $VERBOSE && $STDERR_SCREWS_STDOUT; + warn qq/$0: can't open: $file\n/; + next; + } + unless (read(FILE_IN, $magic'H, $HEADER_BYTES)) { + &clear_message if $VERBOSE && $STDERR_SCREWS_STDOUT; + warn qq/$0: can't read from "$file"\n"/; + close(FILE_IN); + next; + } + + eval $MAGIC_TESTS; + if ($magic'val) { + close(FILE_IN); + warn qq/skip (magic): $file\n/ if $WHY; + next; + } + seek(FILE_IN, 0, 0); ## reset for later <FILE_IN> + } + + if ($WHY != 0 && $VERBOSE > 1) { + if ($VERBOSE>2||$vv_print++>$VV_PRINT_COUNT||($vv_size+=-s _)>$VV_SIZE){ + &message($file); + $vv_print = $vv_size = 0; + } + } + + if ($DELAY) { + sleep($DELAY); + } + + if ($FIND_ONLY) { + &clear_message if $VERBOSE && $STDERR_SCREWS_STDOUT; + print $file, "\n"; + $retval=0; ## we've found something + close(FILE_IN) if $DO_MAGIC_TESTS; + next; + } else { + ## if we weren't doing magic tests, file won't be open yet... + if (!$DO_MAGIC_TESTS && !open(FILE_IN, $file)) { + &clear_message if $VERBOSE && $STDERR_SCREWS_STDOUT; + warn qq/$0: can't open: $file\n/; + next; + } + if ($LIST_ONLY && $CAN_USE_FAST_LISTONLY) { + ## + ## This is rather complex, but buys us a LOT when we're just + ## listing files and not the individual internal lines. + ## + local($size) = 4096; ## block-size in which to do reads + local($nl); ## will point to $_'s ending newline. + local($read); ## will be how many bytes read. + local($_) = ''; ## Starts out empty + local($hold); ## (see below) + + while (($read = read(FILE_IN,$_,$size,length($_)))||length($_)) + { + undef @parts; + ## if read a full block, but no newline, need to read more. + while ($read == $size && ($nl = rindex($_, "\n")) < 0) { + push(@parts, $_); ## save that part + $read = read(FILE_IN, $_, $size); ## keep trying + } + + ## + ## If we had to save parts, must now combine them together. + ## adjusting $nl to reflect the now-larger $_. This should + ## be a lot more efficient than using any kind of .= in the + ## loop above. + ## + if (@parts) { + local($lastlen) = length($_); #only need if $nl >= 0 + $_ = join('', @parts, $_); + $nl = length($_) - ($lastlen - $nl) if $nl >= 0; + } + + ## + ## If we're at the end of the file, then we can use $_ as + ## is. Otherwise, we need to remove the final partial-line + ## and save it so that it'll be at the beginning of the + ## next read (where the rest of the line will be layed in + ## right after it). $hold will be what we should save + ## until next time. + ## + if ($read != $size || $nl < 0) { + $hold = ''; + } else { + $hold = substr($_, $nl + 1); + substr($_, $nl + 1) = ''; + } + + ## + ## Now have a bunch of full lines in $_. Use it. + ## + if (eval $REGEX_TEST) { + &clear_message if $VERBOSE && $STDERR_SCREWS_STDOUT; + print $file, "\n"; + $retval=0; ## we've found something + + last; + } + + ## Prepare for next read.... + $_ = $hold; + } + + } else { ## else not using faster block scanning..... + + $lines_printed = 0 if $NICE; + while (<FILE_IN>) { + study; + next unless (eval $REGEX_TEST); + + ## + ## We found a matching line. + ## + $retval=0; + &clear_message if $VERBOSE && $STDERR_SCREWS_STDOUT; + if ($LIST_ONLY) { + print $file, "\n"; + last; + } else { + ## prepare to print line. + if ($NICE && $lines_printed++ == 0) { + print '-' x 70, "\n" if $NICE > 1; + print $file, ":\n"; + } + + ## + ## Print all the prelim stuff. This looks less efficient + ## than it needs to be, but that's so that when the eval + ## is compiled (and the tests are optimized away), the + ## result will be less actual PRINTs than the more natural + ## way of doing these tests.... + ## + if ($NICE) { + if ($REPORT_LINENUM) { + print " line $.: "; + } else { + print " "; + } + } elsif ($REPORT_LINENUM && $PREPEND_FILENAME) { + print "$file,:$.: "; + } elsif ($PREPEND_FILENAME) { + print "$file: "; + } elsif ($REPORT_LINENUM) { + print "$.: "; + } + print $_; + print "\n" unless m/\n$/; + } + } + print "\n" if ($NICE > 1) && $lines_printed; + } + close(FILE_IN); + } + } + closedir(DIR); +} + +__END__ +.00; ## finish .ig + +'di \" finish diversion--previous line must be blank +.nr nl 0-1 \" fake up transition to first page again +.nr % 0 \" start at page 1 +.\"__________________NORMAL_MAN_PAGE_BELOW_________________ +.ll+10n +.TH search 1 "Dec 17, 1994" +.SH SEARCH +search \- search files (a'la grep) in a whole directory tree. +.SH SYNOPSIS +search [ grep-like and find-like options] [regex ....] +.SH DESCRIPTION +.I Search +is more or less a combo of 'find' and 'grep' (although the regular +expression flavor is that of the perl being used, which is closer to +egrep's than grep's). + +.I Search +does generally the same kind of thing that +.nf + find <blah blah> | xargs egrep <blah blah> +.fi +does, but is +.I much +more powerful and efficient (and intuitive, I think). + +This manual describes +.I search +as of version "941227.4". You can always find the latest version at +.nf + http://www.wg.omron.co.jp/~jfriedl/perl/index.html +.fi + +.SH "QUICK EXAMPLE" +Basic use is simple: +.nf + % search jeff +.fi +will search files in the current directory, and all sub directories, for +files that have "jeff" in them. The lines will be listed with the +containing file's name prepended. +.PP +If you list more than one regex, such as with +.nf + % search jeff Larry Randal+ 'Stoc?k' 'C.*son' +.fi +then a line containing any of the regexes will be listed. +This makes it effectively the same as +.nf + % search 'jeff|Larry|Randal+|Stoc?k|C.*son' +.fi +However, listing them separately is much more efficient (and is easier +to type). +.PP +Note that in the case of these examples, the +.B \-w +(list whole-words only) option would be useful. +.PP +Normally, various kinds of files are automatically removed from consideration. +If it has has a certain ending (such as ".tar", ".Z", ".o", .etc), or if +the beginning of the file looks like a binary, it'll be excluded. +You can control exactly how this works -- see below. One quick way to +override this is to use the +.B \-all +option, which means to consider all the files that would normally be +automatically excluded. +Or, if you're curious, you can use +.B \-why +to have notes about what files are skipped (and why) printed to stderr. + +.SH "BASIC OVERVIEW" +Normally, the search starts in the current directory, considering files in +all subdirectories. + +You can use the +.I ~/.search +file to control ways to automatically exclude files. +If you don't have this file, a default one will kick in, which automatically +add +.nf + -skip .o .Z .gif +.fi +(among others) to exclude those kinds of files (which you probably want to +skip when searching for text, as is normal). +Files that look to be be binary will also be excluded. + +Files ending with "#" and "~" will also be excluded unless the +.B -x~ +option is given. + +You can use +.B -showrc +to show what kinds of files will normally be skipped. +See the section on the startup file +for more info. + +You can use the +.B -all +option to indicate you want to consider all files that would otherwise be +skipped by the startup file. + +Based upon various other flags (see "WHICH FILES TO CONSIDER" below), +more files might be removed from consideration. For example +.nf + -mtime 3 +.fi +will exclude files that aren't at least three days old (change the 3 to -3 +to exclude files that are more than three days old), while +.nf + -skip .* +.fi +would exclude any file beginning with a dot (of course, '.' and '..' are +special and always excluded). + +If you'd like to see what files are being excluded, and why, you can get the +list via the +.B \-why +option. + +If a file makes it past all the checks, it is then "considered". +This usually means it is greped for the regular expressions you gave +on the command line. + +If any of the regexes match a line, the line is printed. +However, if +.B -list +is given, just the filename is printed. Or, if +.B -nice +is given, a somewhat more (human-)readable output is generated. + +If you're searching a huge tree and want to keep informed about how +the search is progressing, +.B -v +will print (to stderr) the current directory being searched. +Using +.B -vv +will also print the current file "every so often", which could be useful +if a directory is huge. Using +.B -vvv +will print the update with every file. + +Below is the full listing of options. + +.SH "OPTIONS TELLING *WHERE* TO SEARCH" +.TP +.BI -dir " DIR" +Start searching at the named directory instead of the current directory. +If multiple +.B -dir +arguments are given, multiple trees will be searched. +.TP +.BI -ddir " DIR" +Like +.B -dir +except it flushes any previous +.B -dir +directories (i.e. "-dir A -dir B -dir C" will search A, B, and C, while +"-dir A -ddir B -dir C" will search only B and C. This might be of use +in the startup file (see that section below). +.TP +.B -xdev +Stay on the same filesystem as the starting directory/directories. +.TP +.B -sort +Sort the items in a directory before processing them. +Normally they are processed in whatever order they happen to be read from +the directory. +.TP +.B -nolinks +Don't follow symbolic links. Normally they're followed. + +.SH "OPTIONS CONTROLLING WHICH FILES TO CONSIDER AND EXCLUDE" +.TP +.BI -mtime " NUM" +Only consider files that were last changed more than +.I NUM +days ago +(less than +.I NUM +days if +.I NUM +has '-' prepended, i.e. "-mtime -2.5" means to consider files that +have been changed in the last two and a half days). +.TP +.B -older FILE +Only consider files that have not changed since +.I FILE +was last changed. +If there is any upper case in the "-older", "or equal" is added to the sense +of the test. Therefore, "search -older ./file regex" will never consider +"./file", while "search -Older ./file regex" will. + +If a file is a symbolic link, the time used is that of the file and not the +link. +.TP +.BI -newer " FILE" +Opposite of +.BR -older . +.TP +.BI -name " GLOB" +Only consider files that match the shell filename pattern +.IR GLOB . +The check is only done on a file's name (use +.B -path +to check the whole path, and use +.B -dname +to check directory names). + +Multiple specifications can be given by separating them with spaces, a'la +.nf + -name '*.c *.h' +.fi +to consider C source and header files. +If +.I GLOB +doesn't contain any special pattern characters, a '*' is prepended. +This last example could have been given as +.nf + -name '.c .h' +.fi +It could also be given as +.nf + -name .c -name .h +.fi +or +.nf + -name '*.c' -name '*.h' +.fi +or +.nf + -name '*.[ch]' +.fi +(among others) +but in this last case, you have to be sure to supply the leading '*'. +.TP +.BI -path " GLOB" +Like +.B -name +except the entire path is checked against the pattern. +.TP +.B -regex " REGEX" +Considers files whose names (not paths) match the given perl regex +exactly. +.TP +.BI -iname " GLOB" +Case-insensitive version of +.BR -name . +.TP +.BI -ipath " GLOB" +Case-insensitive version of +.BR -path . +.TP +.BI -iregex " REGEX" +Case-insensitive version of +.BR -regex . + +.TP +.BI -dpath " GLOB" +Only search down directories whose path matches the given pattern (this +doesn't apply to the initial directory given by +.BI -dir , +of course). +Something like +.nf + -dir /usr/man -dpath /usr/man/man* +.fi +would completely skip +"/usr/man/cat1", "/usr/man/cat2", etc. +.TP +.BI -dskip " GLOB" +Skips directories whose name (not path) matches the given pattern. +Something like +.nf + -dir /usr/man -dskip cat* +.fi +would completely skip any directory in the tree whose name begins with "cat" +(including "/usr/man/cat1", "/usr/man/cat2", etc.). +.TP +.BI -dregex " REGEX" +Like +.BI -dpath , +but the pattern is a full perl regex. Note that this quite different +from +.B -regex +which considers only file names (not paths). This option considers +full directory paths (not just names). It's much more useful this way. +Sorry if it's confusing. +.TP +.BI -dpath " GLOB" +This option exists, but is probably not very useful. It probably wants to +be like the '-below' or something I mention in the "TODO" section. +.TP +.BI -idpath " GLOB" +Case-insensitive version of +.BR -dpath . +.TP +.BI -idskip " GLOB" +Case-insensitive version of +.BR -dskip . +.TP +.BI -idregex " REGEX" +Case-insensitive version of +.BR -dregex . +.TP +.B -all +Ignore any 'magic' or 'option' lines in the startup file. +The effect is that all files that would otherwise be automatically +excluded are considered. +.TP +.BI -x SPECIAL +Arguments starting with +.B -x +(except +.BR -xdev , +explained elsewhere) do special interaction with the +.I ~/.search +startup file. Something like +.nf + -xflag1 -xflag2 +.fi +will turn on "flag1" and "flag2" in the startup file (and is +the same as "-xflag1,flag2"). You can use this to write your own +rules for what kinds of files are to be considered. + +For example, the internal-default startup file contains the line +.nf + <!~> option: -skip '~ #' +.fi +This means that if the +.B -x~ +flag is +.I not +seen, the option +.nf + -skip '~ #' +.fi +should be done. +The effect is that emacs temp and backup files are not normally +considered, but you can included them with the -x~ flag. + +You can write your own rules to customize +.I search +in powerful ways. See the STARTUP FILE section below. +.TP +.B -why +Print a message (to stderr) when and why a file is not considered. + +.SH "OPTIONS TELLING WHAT TO DO WITH FILES THAT WILL BE CONSIDERED" +.TP +.B -find +(you can use +.B -f +as well). +This option changes the basic action of +.IR search . + +Normally, if a file is considered, it is searched +for the regular expressions as described earlier. However, if this option +is given, the filename is printed and no searching takes place. This turns +.I search +into a 'find' of some sorts. + +In this case, no regular expressions are needed on the command line +(any that are there are silently ignored). + +This is not intended to be a replacement for the 'find' program, +but to aid +you in understanding just what files are getting past the exclusion checks. +If you really want to use it as a sort of replacement for the 'find' program, +you might want to use +.B -all +so that it doesn't waste time checking to see if the file is binary, etc +(unless you really want that, of course). + +If you use +.BR -find , +none of the "GREP-LIKE OPTIONS" (below) matter. + +As a replacement for 'find', +.I search +is probably a bit slower (or in the case of GNU find, a lot slower -- +GNU find is +.I unbelievably +fast). +However, "search -ffind" +might be more useful than 'find' when options such as +.B -skip +are used (at least until 'find' gets such functionality). +.TP +.B -ffind +(or +.BR -ff ) +A faster more 'find'-like find. Does +.nf + -find -all -dorep +.fi +.SH "GREP-LIKE OPTIONS" +These options control how a searched file is accessed, +and how things are printed. +.TP +.B -i +Ignore letter case when matching. +.TP +.B -w +Consider only whole-word matches ("whole word" as defined by perl's "\\b" +regex). +.TP +.B -u +If the regex(es) is/are simple, try to modify them so that they'll work +in manpage-like underlined text (i.e. like _^Ht_^Hh_^Hi_^Hs). +This is very rudimentary at the moment. +.TP +.B -list +(you can use +.B -l +too). +Don't print matching lines, but the names of files that contain matching +lines. This will likely be *much* faster, as special optimizations are +made -- particularly with large files. +.TP +.B -n +Pepfix each line by its line number. +.TP +.B -nice +Not a grep-like option, but similar to +.BR -list , +so included here. +.B -nice +will have the output be a bit more human-readable, with matching lines printed +slightly indented after the filename, a'la +.nf + + % search foo + somedir/somefile: line with foo in it + somedir/somefile: some food for thought + anotherdir/x: don't be a buffoon! + % + +.fi +will become +.nf + + % search -nice foo + somedir/somefile: + line with foo in it + some food for thought + anotherdir/x: + don't be a buffoon! + % + +.fi +This option due to Lionel Cons. +.TP +.B -nnice +Be a bit nicer than +.BR -nice . +Prefix each file's output by a rule line, and follow with an extra blank line. +.TP +.B -h +Don't prepend each output line with the name of the file +(meaningless when +.B -find +or +.B -l +are given). + +.SH "OTHER OPTIONS" +.TP +.B -help +Print the usage information. +.TP +.B -version +Print the version information and quit. +.TP +.B -v +Set the level of message verbosity. +.B -v +will print a note whenever a new directory is entered. +.B -vv +will also print a note "every so often". This can be useful to see +what's happening when searching huge directories. +.B -vvv +will print a new with every file. +.B -vvvv +is +-vvv +plus +.BR -why . +.TP +.B -e +This ends the options, and can be useful if the regex begins with '-'. +.TP +.B -showrc +Shows what is being considered in the startup file, then exits. +.TP +.B -dorep +Normally, an identical file won't be checked twice (even with multiple +hard or symbolic links). If you're just trying to do a fast +.BR -find , +the bookkeeping to remember which files have been seen is not desirable, +so you can eliminate the bookkeeping with this flag. + +.SH "STARTUP FILE" +When +.I search +starts up, it processes the directives in +.IR ~/.search . +If no such file exists, a default +internal version is used. + +The internal version looks like: +.nf + + magic: 32 : $H =~ m/[\ex00-\ex06\ex10-\ex1a\ex1c-\ex1f\ex80\exff]{2}/ + option: -skip '.a .COM .elc .EXE .gz .o .pbm .xbm .dvi' + option: -iskip '.tarz .zip .z .lzh .jpg .jpeg .gif .uu' + <!~> option: -skip '~ #' + +.fi +If you wish to create your own "~/.search", +you might consider copying the above, and then working from there. + +There are two kinds of directives in a startup file: "magic" and "option". +.RS 0n +.TP +OPTION +Option lines will automatically do the command-line options given. +For example, the line +.nf + option: -v +.fi +in you startup file will turn on -v every time, without needing to type it +on the command line. + +The text on the line after the "option:" directive is processed +like the Bourne shell, so make sure to pay attention to quoting. +.nf + option: -skip .exe .com +.fi +will give an error (".com" by itself isn't a valid option), while +.nf + option: -skip ".exe .com" +.fi +will properly include it as part of -skip's argument. + +.TP +MAGIC +Magic lines are used to determine if a file should be considered a binary +or not (the term "magic" refers to checking a file's magic number). These +are described in more detail below. +.RE + +Blank lines and comments (lines beginning with '#') are allowed. + +If a line begins with <...>, then it's a check to see if the +directive on the line should be done or not. The stuff inside the <...> +can contain perl's && (and), || (or), ! (not), and parens for grouping, +along with "flags" that might be indicated by the user with +.BI -x flag +options. + +For example, using "-xfoo" will cause "foo" to be true inside the <...> +blocks. Therefore, a line beginning with "<foo>" would be done only when +"-xfoo" had been specified, while a line beginning with "<!foo>" would be +done only when "-xfoo" is not specified (of course, a line without any <...> +is done in either case). + +A realistic example might be +.nf + <!v> -vv +.fi +This will cause -vv messages to be the default, but allow "-xv" to override. + +There are a few flags that are set automatically: +.RS +.TP +.B TTY +true if the output is to the screen (as opposed to being redirected to a file). +You can force this (as with all the other automatic flags) with -xTTY. +.TP +.B -v +True if -v was specified. If -vv was specified, both +.B -v +and +.B -vv +flags are true (and so on). +.TP +.B -nice +True if -nice was specified. Same thing about -nnice as for -vv. +.PP +.TP +.B -list +true if -list (or -l) was given. +.TP +.B -dir +true if -dir was given. +.RE + +Using this info, you might change the last example to +.nf + + <!v && !-v> option: -vv + +.fi +The added "&& !-v" means "and if the '-v' option not given". +This will allow you to use "-v" alone on the command line, and not +have this directive add the more verbose "-vv" automatically. + +.RS 0 +Some other examples: +.TP +<!-dir && !here> option: -dir ~/ +Effectively make the default directory your home directory (instead of the +current directory). Using -dir or -xhere will undo this. +.TP +<tex> option: -name .tex -dir ~/pub +Create '-xtex' to search only "*.tex" files in your ~/pub directory tree. +Actually, this could be made a bit better. If you combine '-xtex' and '-dir' +on the command line, this directive will add ~/pub to the list, when you +probably want to use the -dir directory only. You could do +.nf + + <tex> option: -name .tex + <tex && !-dir> option: -dir ~/pub +.fi + +to will allow '-xtex' to work as before, but allow a command-line "-dir" +to take precedence with respect to ~/pub. +.TP +<fluff> option: -nnice -sort -i -vvv +Combine a few user-friendly options into one '-xfluff' option. +.TP +<man> option: -ddir /usr/man -v -w +When the '-xman' option is given, search "/usr/man" for whole-words +(of whatever regex or regexes are given on the command line), with -v. +.RE + +The lines in the startup file are executed from top to bottom, so something +like +.nf + + <both> option: -xflag1 -xflag2 + <flag1> option: ...whatever... + <flag2> option: ...whatever... + +.fi +will allow '-xboth' to be the same as '-xflag1 -xflag2' (or '-xflag1,flag2' +for that matter). However, if you put the "<both>" line below the others, +they will not be true when encountered, so the result would be different +(and probably undesired). + +The "magic" directives are used to determine if a file looks to be binary +or not. The form of a magic line is +.nf + magic: \fISIZE\fP : \fIPERLCODE\fP +.fi +where +.I SIZE +is the number of bytes of the file you need to check, and +.I PERLCODE +is the code to do the check. Within +.IR PERLCODE , +the variable $H will hold at least the first +.I SIZE +bytes of the file (unless the file is shorter than that, of course). +It might hold more bytes. The perl should evaluate to true if the file +should be considered a binary. + +An example might be +.nf + magic: 6 : substr($H, 0, 6) eq 'GIF87a' +.fi +to test for a GIF ("-iskip .gif" is better, but this might be useful +if you have images in files without the ".gif" extension). + +Since the startup file is checked from top to bottom, you can be a bit +efficient: +.nf + magic: 6 : ($x6 = substr($H, 0, 6)) eq 'GIF87a' + magic: 6 : $x6 eq 'GIF89a' +.fi +You could also write the same thing as +.nf + magic: 6 : (($x6 = substr($H, 0, 6)) eq 'GIF87a') || ## an old gif, or.. \e + $x6 eq 'GIF89a' ## .. a new one. +.fi +since newlines may be escaped. + +The default internal startup file includes +.nf + magic: 32 : $H =~ m/[\ex00-\ex06\ex10-\ex1a\ex1c-\ex1f\ex80\exff]{2}/ +.fi +which checks for certain non-printable characters, and catches a large +number of binary files, including most system's executables, linkable +objects, compressed, tarred, and otherwise folded, spindled, and mutilated +files. + +Another example might be +.nf + ## an archive library + magic: 17 : substr($H, 0, 17) eq "!<arch>\en__.SYMDEF" +.fi + +.SH "RETURN VALUE" +.I Search +returns zero if lines (or files, if appropriate) were found, +or if no work was requested (such as with +.BR -help ). +Returns 1 if no lines (or files) were found. +Returns 2 on error. + +.SH TODO +Things I'd like to add some day: +.nf + + show surrounding lines (context). + + highlight matched portions of lines. + + add '-and', which can go between regexes to override + the default logical or of the regexes. + + add something like + -below GLOB + which will examine a tree and only consider files that + lie in a directory deeper than one named by the pattern. + + add 'warning' and 'error' directives. + + add 'help' directive. +.fi +.SH BUGS +If -xdev and multiple -dir arguments are given, any file in any of the +target filesystems are allowed. It would be better to allow each filesystem +for each separate tree. + +Multiple -dir args might also cause some confusing effects. Doing +.nf + -dir some/dir -dir other +.fi +will search "some/dir" completely, then search "other" completely. This +is good. However, something like +.nf + -dir some/dir -dir some/dir/more/specific +.fi +will search "some/dir" completely *except for* "some/dir/more/specific", +after which it will return and be searched. Not really a bug, but just sort +of odd. + +File times (for -newer, etc.) of symbolic links are for the file, not the +link. This could cause some misunderstandings. + +Probably more. Please let me know. +.SH AUTHOR +Jeffrey Friedl, Omron Corp (jfriedl@omron.co.jp) +.br +http://www.wg.omron.co.jp/cgi-bin/j-e/jfriedl.html + +.SH "LATEST SOURCE" +See http://www.wg.omron.co.jp/~jfriedl/perl/index.html +__END__ +:endofperl |