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cvsserver: use safe_pipe_capture instead of backticks 

This makes the script pass arguments that are derived from end-user
input in safer way when invoking subcommands.

Reported-by: joernchen <joernchen@phenoelit.de>
Signed-off-by: joernchen <joernchen@phenoelit.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
joernchen 2017-09-11 14:45:09 +09:00 committed by Junio C Hamano
parent fce13af5d2
commit 27dd73871f
1 changed files with 11 additions and 11 deletions
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22
git-cvsserver.perl
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@ -841,7 +841,7 @@ sub req_Modified
# Save the file data in $state
$state->{entries}{$state->{directory}.$data}{modified_filename} = $filename;
$state->{entries}{$state->{directory}.$data}{modified_mode} = $mode;
$state->{entries}{$state->{directory}.$data}{modified_hash} = `git hash-object $filename`;
$state->{entries}{$state->{directory}.$data}{modified_hash} = safe_pipe_capture('git','hash-object',$filename);
$state->{entries}{$state->{directory}.$data}{modified_hash} =~ s/\s.*$//s;
#$log->debug("req_Modified : file=$data mode=$mode size=$size");
@ -1463,7 +1463,7 @@ sub req_update
# transmit file, format is single integer on a line by itself (file
# size) followed by the file contents
# TODO : we should copy files in blocks
my $data = `cat $mergedFile`;
my $data = safe_pipe_capture('cat', $mergedFile);
$log->debug("File size : " . length($data));
print length($data) . "\n";
print $data;
@ -1579,7 +1579,7 @@ sub req_ci
$branchRef = "refs/heads/$stickyInfo->{tag}";
}
$parenthash = `git show-ref -s $branchRef`;
$parenthash = safe_pipe_capture('git', 'show-ref', '-s', $branchRef);
chomp $parenthash;
if ($parenthash !~ /^[0-9a-f]{40}$/)
{
@ -1704,7 +1704,7 @@ sub req_ci
}
close $msg_fh;
my $commithash = `git commit-tree $treehash -p $parenthash < $msg_filename`;
my $commithash = safe_pipe_capture('git', 'commit-tree', $treehash, '-p', $parenthash, '-F', $msg_filename);
chomp($commithash);
$log->info("Commit hash : $commithash");
@ -2854,12 +2854,12 @@ sub transmitfile
die "Need filehash" unless ( defined ( $filehash ) and $filehash =~ /^[a-zA-Z0-9]{40}$/ );
my $type = `git cat-file -t $filehash`;
my $type = safe_pipe_capture('git', 'cat-file', '-t', $filehash);
chomp $type;
die ( "Invalid type '$type' (expected 'blob')" ) unless ( defined ( $type ) and $type eq "blob" );
my $size = `git cat-file -s $filehash`;
my $size = safe_pipe_capture('git', 'cat-file', '-s', $filehash);
chomp $size;
$log->debug("transmitfile($filehash) size=$size, type=$type");
@ -3040,7 +3040,7 @@ sub ensureWorkTree
chdir $work->{emptyDir} or
die "Unable to chdir to $work->{emptyDir}\n";
my $ver = `git show-ref -s refs/heads/$state->{module}`;
my $ver = safe_pipe_capture('git', 'show-ref', '-s', "refs/heads/$state->{module}");
chomp $ver;
if ($ver !~ /^[0-9a-f]{40}$/)
{
@ -3287,7 +3287,7 @@ sub open_blob_or_die
die "Need filehash\n";
}
my $type = `git cat-file -t $name`;
my $type = safe_pipe_capture('git', 'cat-file', '-t', $name);
chomp $type;
unless ( defined ( $type ) and $type eq "blob" )
@ -3296,7 +3296,7 @@ sub open_blob_or_die
die ( "Invalid type '$type' (expected 'blob')" )
}
my $size = `git cat-file -s $name`;
my $size = safe_pipe_capture('git', 'cat-file', '-s', $name);
chomp $size;
$log->debug("open_blob_or_die($name) size=$size, type=$type");
@ -3813,10 +3813,10 @@ sub update
# first lets get the commit list
$ENV{GIT_DIR} = $self->{git_path};
my $commitsha1 = `git rev-parse $self->{module}`;
my $commitsha1 = ::safe_pipe_capture('git', 'rev-parse', $self->{module});
chomp $commitsha1;
my $commitinfo = `git cat-file commit $self->{module} 2>&1`;
my $commitinfo = ::safe_pipe_capture('git', 'cat-file', 'commit', $self->{module});
unless ( $commitinfo =~ /tree\s+[a-zA-Z0-9]{40}/ )
{
die("Invalid module '$self->{module}'");