[Feature Request] SceIoStat functions

[bb010g]

Functions that deal with file status (declared in VitaSDK's File Status Library, <psp2/io/stat.h>) are not exposed by LPP, specifically the functions dealing with SceIoStat: sceIoGetstat(), sceIoGetstatByFd(), sceIoChstat(), and sceIoChstatByFd(). (The ByFd variants would likely fold into LPP's handle interface, provided from functions like System.getFile).)

These functions are useful for implementing file managers at least.

[Rinnegatamante]

What fields in particular would you need from SceIoStat?

[bb010g]

Ideally? All of them. st_mtime, st_ctime, & st_atime are standard file system fields, st_size is being returned anyways from this call and useful, st_mode allows for making files visible to safe homebrew via the others octet (VitaShell removed that patch's functionality and doesn't let you change file permissions), and by now st_attr is probably worth carrying through too unless it's a huge footgun to modify? st_private looks reasonable to leave out, but I also don't know what it's used for ("Device-specific data.").

There's no way to get to these currently without either writing C or figuring out LuaJIT's FFI library, which makes me uncomfortable due to hyln9/vita-libdl#1 being an open issue relating to void *symbol_lookup(char *module, char *symbol). (By the way, tossed lpp-vita's eboot_unsafe.bin.elf into Ghidra and am chasing down where https://pastebin.com/V615iLtj was coming from; see that issue.)

[Rinnegatamante]

is there an usage of sceIoChstat and/or doc about it? The only snippets i found about it are to fill an error on id.dat so that it gets regenerated.

[bb010g]

There's one linked in the VitaShell commit? As for documentation, VitaSDK's Doxygen seems to cover it pretty alright; Unix's chmod(2) is also pretty similar. https://manpage.me/index.cgi?q=chmod&sektion=2&manpath=OpenBSD+6.2

[Rinnegatamante]

Partially solved with 2fafdc8