Johannes Sixt <j6t@xxxxxxxx> writes:
>> +#define IS_SBS(ch) (((ch) == '/') || ((ch) == '\\'))
I think you already have mingw_is_dir_sep() and its shorter alias
is_dir_sep() available to you.
>> +/*
>> + * Does the pathname map to the local named pipe filesystem?
>> + * That is, does it have a "//./pipe/" prefix?
>> + */
>> +static int mingw_is_local_named_pipe_path(const char *filename)
There is no need to prefix mingw_ to this function that is file
local static. Isn't is_local_named_pipe() descriptive and unique
enough?
>> +{
>> + return (IS_SBS(filename[0]) &&
>> + IS_SBS(filename[1]) &&
>> + filename[2] == '.' &&
>> + IS_SBS(filename[3]) &&
>> + !strncasecmp(filename+4, "pipe", 4) &&
>> + IS_SBS(filename[8]) &&
>> + filename[9]);
>> +}
>> +#undef IS_SBS
It is kind-of surprising that there hasn't been any existing need
for a helper function that would allow us to write this function
like so:
static int is_local_named_pipe(const char *path)
{
return path_is_in_directory(path, "//./pipe/");
}
Not a suggestion to add such a thing; as long as we know there is no
other codepath that would benefit from having one, a generalization
like that can and should wait.
>> int mingw_open (const char *filename, int oflags, ...)
>> {
>> typedef int (*open_fn_t)(wchar_t const *wfilename, int oflags, ...);
>> @@ -387,7 +419,7 @@ int mingw_open (const char *filename, int oflags, ...)
>> if (filename && !strcmp(filename, "/dev/null"))
>> filename = "nul";
>> - if (oflags & O_APPEND)
>> + if ((oflags & O_APPEND) && !mingw_is_local_named_pipe_path(filename))
>> open_fn = mingw_open_append;
>> else
>> open_fn = _wopen;
>
> This looks reasonable.
>
> I wonder which part of the code uses local named pipes. Is it
> downstream in Git for Windows or one of the topics in flight?
>
> -- Hannes
