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gethostbyname_r and sysinfo are names of host C library functions. Defining them in libScePosixForWebKit made the library's own call to ::gethostbyname_r in Resolver.cpp bind to the new declaration, and the guest_resolver test failed with "gethostbyname_r not implemented". Export the two NIDs through a helper with the library's own prefix, the way libSceAmpr re-exports the libc functions.
14 lines
4.3 KiB
Markdown
14 lines
4.3 KiB
Markdown
# libScePosixForWebKit technical debt
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### Unknown function info
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- [gethostbyname](../../../core/libs/prx/libScePosixForWebKit/Resolver.cpp) (libScePosixForWebKit) - numeric IPv4 forms, trailing whitespace and 64-bit accumulation follow FreeBSD 11.4 [inet_aton](https://github.com/freebsd/freebsd-src/blob/releng/11.4/lib/libc/inet/inet_addr.c); clearing the resolver error on numeric success follows [fakeaddr](https://github.com/freebsd/freebsd-src/blob/releng/11.4/lib/libc/net/gethostnamadr.c). Exact PS5 behavior is unverified; hostname lookup still uses the host resolver
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- [__wrap_access, __wrap_clock_gettime, __wrap_fchown, __wrap_getcwd, __wrap_getenv, __wrap_link, __wrap_lstat, __wrap_mmap, __wrap_readlink, __wrap_statvfs, __wrap_symlink, clock_gettime_np, getenv_np, gethostbyname_r (`scePosixForWebKit_gethostbyname_r`), mmap_np, msetname, pthread_setschedparam_np, setenv_np, sysinfo (`scePosixForWebKit_sysinfo`)](../../../core/libs/prx/libScePosixForWebKit/Export.cpp) (libScePosixForWebKit) - names/NIDs appear in the [PS5 3.20 export inventory](https://github.com/DNNDHH/PS5-3.20_Libs/blob/b2a77c09cd71c01f34c790cfbe98c751a13262ad/libScePosixForWebKit.c) and [verified NID name database](https://github.com/zecoxao/sce_symbols/blob/2883963a0a514ba6e77407a08ef4730a65e88254/aerolib.csv); credible prototypes are unknown. These exports use renamed helpers; defining `gethostbyname_r` would interpose on the host function this library calls itself. All are parameterless import stubs, not ABI claims; callers must not use them until signatures are verified.
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### Functional
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- [mkstemp and isatty](../../../core/libs/prx/libScePosixForWebKit/Filesystem.cpp) (libScePosixForWebKit) follow FreeBSD's [temporary-file API](https://github.com/freebsd/freebsd-src/blob/stable/9/lib/libc/stdio/mktemp.c) and [terminal check](https://github.com/freebsd/freebsd-src/blob/stable/9/lib/libc/gen/isatty.c), without console verification. `mkstemp` replaces all trailing `X` characters, accepts a fixed name, and creates files through the guest path resolver with exclusive read/write access and mode 0600. Windows file permissions follow the existing kernel file implementation. `isatty` tests Windows console handles rather than all character devices; files, pipes and guest sockets return `ENOTTY`, closed descriptors return `EBADF`.
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- [arc4random](../../../core/libs/prx/libScePosixForWebKit/Export.cpp) (libScePosixForWebKit) returns four bytes of host OS entropy (`getentropy`, `rand_s` on Windows), as `arc4random_buf` does, uniform over the 32-bit range like FreeBSD 11.4's RC4 keystream in [arc4random.c](https://github.com/freebsd/freebsd-src/blob/8c639945a44588f6cfdddfb057bb5aad88735da0/lib/libc/gen/arc4random.c). The console's generator and its reseeding are unknown; `arc4random_uniform`, `arc4random_stir` and `arc4random_addrandom` are not in the module's export set and are absent
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- [fnmatch](../../../core/libs/prx/libScePosixForWebKit/Export.cpp) (libScePosixForWebKit) follows FreeBSD 11 [fnmatch.c](https://github.com/freebsd/freebsd-src/blob/stable/11/lib/libc/gen/fnmatch.c) in the C locale: each byte is one character, `FNM_CASEFOLD` folds ASCII letters only, and bracket ranges compare byte values. `[:class:]` names are not character classes: as in FreeBSD 11 through 14, `[[:digit:]]` is the set of `[`, `:`, `d`, `i`, `g`, `t` followed by a literal `]` (classes were added to `fnmatch.c` after 14). Multibyte characters and locale collation are not modelled. A null pattern or string throws
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- [getservbyname](../../../core/libs/prx/libScePosixForWebKit/Resolver.cpp) (libScePosixForWebKit) searches a built-in copy of 37 lines of FreeBSD 11.4's [etc/services](https://github.com/freebsd/freebsd-src/blob/8c639945a44588f6cfdddfb057bb5aad88735da0/etc/services) (ftp-data, ftp, ssh, telnet, smtp, domain, tftp, http, pop3, ntp, imap, https, rtsp, submission, imaps, pop3s with their aliases and protocols, in file order) the way [getservent.c](https://github.com/freebsd/freebsd-src/blob/8c639945a44588f6cfdddfb057bb5aad88735da0/lib/libc/net/getservent.c) searches the file: case-sensitive name or alias, a null protocol takes the first match, the port in network byte order, the result in per-thread storage. The console's `/etc/services` is unknown, so any other service returns null without setting `errno`, as for a name the file lacks. `getaddrinfo` still resolves service names through the host's service database
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