VxWorks libc cleanups and fixes for some libc-test issues that were p…

[n-salim]

…reviously skipped

[BaoshanPang]

Please run "sh ci/style.sh" to find the style and format problems.

[BaoshanPang]

I am seeing these errors in building rust with this branch:

error[E0412]: cannot find type passwd in crate libc
--> src/libstd/sys/vxworks/os.rs:300:31
|
300 | let mut passwd: libc::passwd = mem::zeroed();
| ^^^^^^ not found in libc

error[E0425]: cannot find function getpwuid_r in crate libc
--> src/libstd/sys/vxworks/os.rs:302:21
|
302 | match libc::getpwuid_r(libc::getuid(), &mut passwd, buf.as_mut_ptr(),
| ^^^^^^^^^^ not found in libc

[BaoshanPang]

I am seeing these errors in building rust with this branch:

error[E0412]: cannot find type passwd in crate libc
--> src/libstd/sys/vxworks/os.rs:300:31
|
300 | let mut passwd: libc::passwd = mem::zeroed();
| ^^^^^^ not found in libc

error[E0425]: cannot find function getpwuid_r in crate libc
--> src/libstd/sys/vxworks/os.rs:302:21
|
302 | match libc::getpwuid_r(libc::getuid(), &mut passwd, buf.as_mut_ptr(),
| ^^^^^^^^^^ not found in libc

These functions are used in function home_dir. Do we need to support this function? It seems there is no concept of "home directory" on vxWorks.

[n-salim]

These functions are used in home_dir. Do we need to support this function? It seems there is no concept of "home directory" on vxWorks.

Resolved by Wind-River/rust#24

[BaoshanPang]

Can you rebase/squash the two commits into one? This is usually what I do.

[n-salim]

Hold on, something went wrong and the style test seems to be reporting problems. Let me figure it out ...

[n-salim]

OK ci/style.sh passes now. Actually it may be that I was running a newer version of rustfmt ths time.