cvs commit: src/sys/kern vfs_mount.c
phk at phk.freebsd.dk
Wed Nov 9 07:01:40 GMT 2005
In message <43716BD6.5050604 at root.org>, Nate Lawson writes:
>While I don't have ideas for a better general mechanism for this, I
>think it sets a bad precedent. We can't have every complex syscall
>transporting its own error message strings back to the user program.
>And we can't expand errno to be the union of every single API-specific
That was one the main points of my ioctl talk at BSDcan.
One way to solve it:
Hang a sbuf pointer in each thread and APIs cound stuff their error
Add a new syscall to return the string to userland.
Modify perror(3), err(3) and similar to pull out the "extended"
error, if there is one.
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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