comparison mercurial/posix.py @ 41289:593f6359681d

update: fix edge-case with update.atomic-file and read-only files

We used to create the tempfile with the original file mode. That means
creating a read-only tempfile when the original file is read-only, which crash
if we need to write on the tempfile.

The file in the working directory ends up being writable with and without the
atomic update config, so the behavior is the same.

41288:17941fc53ae9

        os.chmod(f, s | (s & 0o444) >> 2 & ~umask)
    elif not x and sx:
        # Turn off all +x bits
        os.chmod(f, s & 0o666)

def copymode(src, dst, mode=None):
    '''Copy the file mode from the file at path src to dst.
    If src doesn't exist, we're using mode instead. If mode is None, we're
    using umask.'''
    try:
        st_mode = os.lstat(src).st_mode & 0o777

            raise
        st_mode = mode
        if st_mode is None:
            st_mode = ~umask
        st_mode &= 0o666
    os.chmod(dst, st_mode)

def checkexec(path):
    """
    Check whether the given path is on a filesystem with UNIX-like exec flags

41289:593f6359681d

        os.chmod(f, s | (s & 0o444) >> 2 & ~umask)
    elif not x and sx:
        # Turn off all +x bits
        os.chmod(f, s & 0o666)

def copymode(src, dst, mode=None, enforcewritable=False):
    '''Copy the file mode from the file at path src to dst.
    If src doesn't exist, we're using mode instead. If mode is None, we're
    using umask.'''
    try:
        st_mode = os.lstat(src).st_mode & 0o777

            raise
        st_mode = mode
        if st_mode is None:
            st_mode = ~umask
        st_mode &= 0o666

    new_mode = st_mode

    if enforcewritable:
        new_mode |= stat.S_IWUSR

    os.chmod(dst, new_mode)

def checkexec(path):
    """
    Check whether the given path is on a filesystem with UNIX-like exec flags