major refactorings

Signed-off-by: kaguya3311 <kaguya3311@national.shitposting.agency>

user/include/mlibc/options/posix/generic/unistd.cpp

@@ -65,7 +65,7 @@ int chown(const char *path, uid_t uid, gid_t gid) {
 	return 0;
 }
 
-ssize_t confstr(int name, char *buf, size_t len) {
+size_t confstr(int name, char *buf, size_t len) {
 	const char *str = "";
 	if (name == _CS_PATH) {
 		str = "/bin:/usr/bin";

user/include/mlibc/options/posix/include/unistd.h

@@ -264,7 +264,7 @@ unsigned int alarm(unsigned int __seconds);
 int chdir(const char *__path);
 int chown(const char *__path, uid_t __uid, gid_t __gid);
 int close(int __fd);
-ssize_t confstr(int __name, char *__buf, size_t __size);
+size_t confstr(int __name, char *__buf, size_t __size);
 char *ctermid(char *__s);
 int dup(int __fd);
 int dup2(int __src_fd, int __dest_fd);