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;# The validate routine takes a single multiline string consisting of
;# lines containing a filename plus a file test to try on it. (The
;# file test may also be a 'cd', causing subsequent relative filenames
;# to be interpreted relative to that directory.) After the file test
;# you may put '|| die' to make it a fatal error if the file test fails.
;# The default is '|| warn'. The file test may optionally have a ! prepended
;# to test for the opposite condition. If you do a cd and then list some
;# relative filenames, you may want to indent them slightly for readability.
;# If you supply your own "die" or "warn" message, you can use $file to
;# interpolate the filename.
;# Filetests may be bunched: -rwx tests for all of -r, -w and -x.
;# Only the first failed test of the bunch will produce a warning.
;# The routine returns the number of warnings issued.
;# Usage:
;# require "validate.pl";
;# $warnings += do validate('
;# /vmunix -e || die
;# /boot -e || die
;# /bin cd
;# csh -ex
;# csh !-ug
;# sh -ex
;# sh !-ug
;# /usr -d || warn "What happened to $file?\n"
;# ');
sub validate {
local($file,$test,$warnings,$oldwarnings);
foreach $check (split(/\n/,$_[0])) {
next if $check =~ /^#/;
next if $check =~ /^$/;
($file,$test) = split(' ',$check,2);
if ($test =~ s/^(!?-)(\w{2,}\b)/$1Z/) {
$testlist = $2;
@testlist = split(//,$testlist);
}
else {
@testlist = ('Z');
}
$oldwarnings = $warnings;
foreach $one (@testlist) {
$this = $test;
$this =~ s/(-\w\b)/$1 \$file/g;
$this =~ s/-Z/-$one/;
$this .= ' || warn' unless $this =~ /\|\|/;
$this =~ s/^(.*\S)\s*\|\|\s*(die|warn)$/$1 || do valmess('$2','$1')/;
$this =~ s/\bcd\b/chdir (\$cwd = \$file)/g;
eval $this;
last if $warnings > $oldwarnings;
}
}
$warnings;
}
sub valmess {
local($disposition,$this) = @_;
$file = $cwd . '/' . $file unless $file =~ m|^/|;
if ($this =~ /^(!?)-(\w)\s+\$file\s*$/) {
$neg = $1;
$tmp = $2;
$tmp eq 'r' && ($mess = "$file is not readable by uid $>.");
$tmp eq 'w' && ($mess = "$file is not writable by uid $>.");
$tmp eq 'x' && ($mess = "$file is not executable by uid $>.");
$tmp eq 'o' && ($mess = "$file is not owned by uid $>.");
$tmp eq 'R' && ($mess = "$file is not readable by you.");
$tmp eq 'W' && ($mess = "$file is not writable by you.");
$tmp eq 'X' && ($mess = "$file is not executable by you.");
$tmp eq 'O' && ($mess = "$file is not owned by you.");
$tmp eq 'e' && ($mess = "$file does not exist.");
$tmp eq 'z' && ($mess = "$file does not have zero size.");
$tmp eq 's' && ($mess = "$file does not have non-zero size.");
$tmp eq 'f' && ($mess = "$file is not a plain file.");
$tmp eq 'd' && ($mess = "$file is not a directory.");
$tmp eq 'l' && ($mess = "$file is not a symbolic link.");
$tmp eq 'p' && ($mess = "$file is not a named pipe (FIFO).");
$tmp eq 'S' && ($mess = "$file is not a socket.");
$tmp eq 'b' && ($mess = "$file is not a block special file.");
$tmp eq 'c' && ($mess = "$file is not a character special file.");
$tmp eq 'u' && ($mess = "$file does not have the setuid bit set.");
$tmp eq 'g' && ($mess = "$file does not have the setgid bit set.");
$tmp eq 'k' && ($mess = "$file does not have the sticky bit set.");
$tmp eq 'T' && ($mess = "$file is not a text file.");
$tmp eq 'B' && ($mess = "$file is not a binary file.");
if ($neg eq '!') {
$mess =~ s/ is not / should not be / ||
$mess =~ s/ does not / should not / ||
$mess =~ s/ not / /;
}
print STDERR $mess,"\n";
}
else {
$this =~ s/\$file/'$file'/g;
print STDERR "Can't do $this.\n";
}
if ($disposition eq 'die') { exit 1; }
++$warnings;
}
1;
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