{"id":28598,"date":"2023-01-01T08:03:15","date_gmt":"2023-01-01T02:33:15","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-modify-perl-script-to-run-for-each-file-with-specified-extension-in-a-given-directory\/"},"modified":"2023-01-01T08:03:15","modified_gmt":"2023-01-01T02:33:15","slug":"solved-modify-perl-script-to-run-for-each-file-with-specified-extension-in-a-given-directory","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-modify-perl-script-to-run-for-each-file-with-specified-extension-in-a-given-directory\/","title":{"rendered":"[Solved] Modify Perl script to run for each file with specified extension in a given directory"},"content":{"rendered":"

[ad_1]
\n<\/p>\n

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<\/div>\n
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\n

I think I managed to generate this correctly (on iPad, sat on the sofa) … There could be some typos ; )<\/code><\/p>\n

Usage: perl test_x397.pl <path><\/code><\/p>\n

test_x397.pl<\/p>\n

#!\/usr\/bin\/perl -w\nuse strict; use warnings;\nuse Encode;\n\nmy ($path) = @ARGV;\n$path \/\/ die \"No path specified\";\n(-e $path) or die \"Path not found: $path\";\n(-d $path) or die \"Not a directory: $path\";\n\nmy @files = <$path\/*.x937>;\n\nforeach my $file (@files) {\n   process($file);\n}\n\nsub process {\n    my ($fname) = @_;\n\n    my ($dir, $file) = $fname =~ m{^(.*)\/(.+)$};\n\n    my $tiff_flag = 0;\n    my $count = 0;\n    my $outfile = sprintf(\"%s\/output_%s.txt\", $dir, $file);\n\n    open (my $outfh, '>', $outfile) or die \"Unable to create $outfile. $!\";\n\n    open (my $infh, '<:raw', $file) or die \"Error opening '$file'. $!\";\n\n\n    my $buffer = undef;\n\n    while (read ($infh,$buffer,4)) {\n        my $rec_len = unpack(\"N\", $buffer);\n        die \"Bad record length: $rec_len\" unless ($rec_len > 0);\n        read ($infh, $buffer, $rec_len);\n\n        if (substr($buffer, 0, 2) eq \"\\xF5\\xF2\") {\n            if ($tiff_flag) {\n                $count++;\n                my $tiff_filename = sprintf('%s\/output_%s_img%04d.tiff', $dir, $file, $count);\n                open (my $tiffh, '>', $tiff_filename) or die \"Can't create image file $!\";\n                binmode($tiffh) or die 'Error setting binary mode on image file';\n                print $tiffh substr($buffer, 117);\n                close $tiffh;\n            }\n            $buffer = substr($buffer, 0, 117);\n        }\n        print $outfh decode ('cp1047', $buffer) . \"\\n\";\n    }\n    close $infh;\n    close $outfh;\n}\n<\/code><\/pre>\n
A few things to note:<\/p>\n
    \n
  1. Always use the three argument version of open<\/li>\n
  2. Using a scalar filehandle makes it easier to pass it around (not necessary in this example but good practice)<\/li>\n
  3. Don’t modify $_. It can lead to nasty surprises in larger programs<\/li>\n
  4. You already used sprintf to make part of your tiff filename, so why not use it for the whole thing.<\/li>\n<\/ol>\n<\/div>\n
    <\/div>\n<\/div>\n
                12<\/span> <\/p><\/div>\n<\/div>\n
    [ad_2]<\/p>\n
    solved Modify Perl script to run for each file with specified extension in a given directory <\/p>\n","protected":false},"excerpt":{"rendered":"
    [ad_1] I think I managed to generate this correctly (on iPad, sat on the sofa) … There could be some typos ; ) Usage: perl test_x397.pl <path> test_x397.pl #!\/usr\/bin\/perl -w use strict; use warnings; use Encode; my ($path) = @ARGV; $path \/\/ die “No path specified”; (-e $path) or die “Path not found: $path”; (-d … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[442],"class_list":["post-28598","post","type-post","status-publish","format-standard","hentry","category-solved","tag-perl"],"yoast_head":"\n[Solved] Modify Perl script to run for each file with specified extension in a given directory - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-modify-perl-script-to-run-for-each-file-with-specified-extension-in-a-given-directory\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Modify Perl script to run for each file with specified extension in a given directory - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] I think I managed to generate this correctly (on iPad, sat on the sofa) … There could be some typos ; ) Usage: perl test_x397.pl <path> test_x397.pl #!\/usr\/bin\/perl -w use strict; use warnings; use Encode; my ($path) = @ARGV; $path \/\/ die "No path specified"; (-e $path) or die "Path not found: $path"; (-d ... 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