- replaced hardcoded day and month names with calls to nl_langinfo,
- integrated langinfo constants  DAY_1, ABDAY_1, MON_1, ABMON_1) for weekday and month names,
- used AM_STR and PM_STR for AM/PM strings in %p and %P specifiers,
- add comments.

Implement sigsetjmp and siglongjmp for X64

See merge request redox-os/relibc!478

Adding `tzset`, timezone awareness, and some tweaks

See merge request redox-os/relibc!596

fix(ld.so): errors UB

See merge request redox-os/relibc!595

Signed-off-by: Anhad Singh <andypython@protonmail.com>

Signed-off-by: Anhad Singh <andypython@protonmail.com>

Currently, how ld.so errors are handled by functions in dlfcn is wrong.
dlopen calls `linker.load_library` which returns a
`Result<ObjectHandler, goblin::Error>`. Now `goblin::Error` may have
variants that are heap allocated. For example:
`Error::Malformed(format!("invalid path: '{}': {}", path, err))`. The
error string would be allocated by ld.so's allocator but will be dropped
inside libc. This is UB.

After this patch, we now return a custom `DlError` instead. To get more
information about the error, `LD_DEBUG=all` can be set.

Signed-off-by: Anhad Singh <andypython@protonmail.com>

Signed-off-by: Anhad Singh <andypython@protonmail.com>

Signed-off-by: Anhad Singh <andypython@protonmail.com>

Signed-off-by: Anhad Singh <andypython@protonmail.com>

feat: rwlock

Closes #196

See merge request redox-os/relibc!594

Implement 'monetary.h' and and a basic strfmon() function

See merge request redox-os/relibc!589

Handle prepended whitespace for hashbang

See merge request redox-os/relibc!591

Signed-off-by: Anhad Singh <andypython@protonmail.com>

Signed-off-by: Anhad Singh <andypython@protonmail.com>

Signed-off-by: Anhad Singh <andypython@protonmail.com>

Signed-off-by: Anhad Singh <andypython@protonmail.com>

Even though it might seem like it, it is not necessary that write(2) is
the only system call performed. It could be that the libc has to
allocate memory (via MMAP) or makes use of a futex. To produce
consistant results, only log on SYS_write and when the syscall number
has been patched.

Signed-off-by: Anhad Singh <andypython@protonmail.com>

* Rwlock -> InnerRwLock
* RwLock makes use of InnerRwLock.

Signed-off-by: Anhad Singh <andypython@protonmail.com>

fix popen tests

See merge request redox-os/relibc!593

Add missing functions to `string.h`

See merge request redox-os/relibc!592

fix popen, improve tests

See merge request redox-os/relibc!590

feat(ld.so): lazy binding and scopes

See merge request redox-os/relibc!586

Signed-off-by: Anhad Singh <andypython@protonmail.com>