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my $symlink_farm = read_env('SYMLINK', 0);
my $link_verbose = read_env('VERBOSE', 0);
my $link_copy = read_env('COPYLINK', 0);
sub read_env {
my $env_var = shift;
my $default = shift;
if (exists($ENV{$env_var})) {
return $ENV{$env_var};
}
# else
return $default;
}
sub good_link ($$) {
my ($src, $dest) = @_;
my $dir_added = 0;
if (! -e $dest) {
# Check if the destination directory does exist
my $ddir = $dest;
$ddir =~ s#/?[^/]+$##g;
if ($ddir eq "")
{
$ddir = ".";
}
if (! -d $ddir) # Create it if not
{
system("mkdir -p $ddir");
$dir_added++;
}
# Link the files
if ($symlink_farm) {
print "Symlink: $dest => $src\n" if ($link_verbose >= 3);
if (not symlink ($src, $dest)) {
die "Symlink from $src to $dest failed: $!\n";
}
} elsif ($link_copy) {
print "Copy: $dest => $src\n" if ($link_verbose >= 3);
if (system("cp -ap $src $dest")) {
my $err_num = $? >> 8;
my $sig_num = $? & 127;
die "Copy from $src to $dest failed: cp exited with error code $err_num, signal $sig_num\n";
}
} else {
print "Hardlink: $dest => $src\n" if ($link_verbose >= 3);
if (not link ($src, $dest)) {
die "Link from $src to $dest failed: $!\n";
}
}
}
return $dir_added;
}
sub real_file ($) {
my $link = shift;
my ($dir, $to);
while (-l $link) {
$dir = $link;
$dir =~ s#[^/]+/?$##;
if ($to = readlink($link)) {
$link = $dir . $to;
} else {
die "Can't readlink $link: $!\n";
}
}
return $link;
}
1;
|
