user: implement mlibc as the libc, finally.

It's finally done..

Signed-off-by: kaguya <vpshinomiya@protonmail.com>

user/include/mlibc/options/posix/generic/sys-resource.cpp

@@ -0,0 +1,61 @@
+
+#include <errno.h>
+#include <sys/resource.h>
+
+#include <bits/ensure.h>
+#include <mlibc/debug.hpp>
+#include <mlibc/posix-sysdeps.hpp>
+
+int getpriority(int which, id_t who) {
+	MLIBC_CHECK_OR_ENOSYS(mlibc::sys_getpriority, -1);
+	int value = 0;
+	if(int e = mlibc::sys_getpriority(which, who, &value); e) {
+		errno = e;
+	}
+	return value;
+}
+
+int setpriority(int which, id_t who, int prio) {
+	MLIBC_CHECK_OR_ENOSYS(mlibc::sys_setpriority, -1);
+	if(int e = mlibc::sys_setpriority(which, who, prio); e) {
+		errno = e;
+		return -1;
+	}
+	return 0;
+}
+
+int getrusage(int scope, struct rusage *usage) {
+	MLIBC_CHECK_OR_ENOSYS(mlibc::sys_getrusage, -1);
+	if(int e = mlibc::sys_getrusage(scope, usage); e) {
+		errno = e;
+		return -1;
+	}
+	return 0;
+}
+
+int getrlimit(int resource, struct rlimit *limit) {
+	MLIBC_CHECK_OR_ENOSYS(mlibc::sys_getrlimit, -1);
+	if(int e = mlibc::sys_getrlimit(resource, limit); e) {
+		errno = e;
+		return -1;
+	}
+	return 0;
+}
+
+[[gnu::alias("getrlimit")]] int getrlimit64(int resource, struct rlimit *limit);
+
+int setrlimit(int resource, const struct rlimit *limit) {
+	MLIBC_CHECK_OR_ENOSYS(mlibc::sys_setrlimit, -1);
+	if(int e = mlibc::sys_setrlimit(resource, limit); e) {
+		errno = e;
+		return -1;
+	}
+	return 0;
+}
+
+[[gnu::alias("setrlimit")]] int setrlimit64(int resource, const struct rlimit *limit);
+
+int prlimit(pid_t, int, const struct rlimit *, struct rlimit *) {
+	__ensure(!"Not implemented");
+	__builtin_unreachable();
+}