![]() | ||||||||||
Messages in this thread |
Jon Smirl writes: > On 7/8/06, Mike Galbraith <efault@gmx.de> wrote: >> On Fri, 2006-07-07 at 22:56 -0400, Jon Smirl wrote: >>> Does anyone use the info in /proc/tty? The hard coded device >>> names aren't compatible with udev's ability to rename things. >>> >>> There also doesn't appear to be any useful info in the drivers >>> portion that isn't already available in sysfs. I can add some code >>> to make a list of registered line disciplines appear in sysfs. >>> >>> Does anyone have a problem with deleting /proc/tty if >>> ldisc enum support is added to sysfs? >> >> ps uses /proc/tty/drivers, so some coordination would be needed. > > Greg, I just looked at the source for ps and it has a bunch > of fixed code for turning major/minor into /dev/name. Isn't > that something udevinfo should be doing? But looking at the > help for udevinfo I don't see any way to turn a major/minor > into /dev/name. The altermative seems to be search /dev > looking for the right device node. By far, the best thing for procps (ps, top, etc.) would be /proc/*/tty links. Code that, give everybody a year to upgrade, and then... maybe. There is no way I'm going to have the procps run a "udevinfo" program, and I very much dislike relying on oddball libraries. Reliability and performance matter; this isn't some GNOME/KDE thing that can break just because 1 of 200 libraries changed. In order, the procps code tries: 1. /proc/*/tty symlink (effectively commented out) 2. /proc/tty/drivers 3. /proc/*/fd/2 symlink 4. hard-coded guess 5. /proc/*/fd/255 symlink 6. "?" Long ago, procps would search /dev for the mapping. This was too slow to be done directly when ps ran, so a binary file in /etc was used to cache the data. Keeping that file updated was a major problem. BTW, cruft gets ripped out some time after Debian-obsolete no longer supports the old kernels. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | |||||||||
| Last update: 2006-07-09 05:33 [from the cache] ©2003-2008 | ||||||||||