[pacman-dev] [PATCH] Add a fetch callback to allow front-end download support

Aaron Griffin aaronmgriffin at gmail.com
Sat Mar 28 17:44:21 EDT 2009

On Sat, Mar 28, 2009 at 4:34 PM, Dan McGee <dpmcgee at gmail.com> wrote:
> On Fri, Feb 20, 2009 at 2:31 AM, Sebastian Nowicki <sebnow at gmail.com> wrote:
>> +/** A callback for downloading files
>> + * @param url the URL of the file to be downloaded
>> + * @param localpath the directory to which the file should be downloaded
>> + * @param mtimeold the modification time of the file previously downloaded
>> + * @param mtimenew the modification time of the newly downloaded file.
>> + * This should be set by the callback.
>> + * @return 0 on success, 1 if the modification times are identical, -1 on
>> + * error.
>> + */
>> +typedef int (*alpm_cb_fetch)(const char *url, const char *localpath,
>> +               time_t mtimeold, time_t *mtimenew);
> Does everyone thing this is a good enough interface? I don't want to
> have to change this later after we release once.

Hmmm I wonder... why do we need to pass the mtime stuff in? Doesn't it
make sense that most fetch callbacks would do the exact same
comparison? I can't see any other need for these - except maybe
mtimenew to set the download file's mtime to match the server's,
but... do we care that they are exact? If we don't set it, it should
always be greater than the server anyway.

I'm kinda just talking here, not putting lots of thought into it, but
are those two points (mtime compare, and setting local file mtime)
sane? Is there something I'm missing?

More information about the pacman-dev mailing list