Squash commits for public release

libs/libc/posix/identity.c

@@ -0,0 +1,44 @@
+#include <assert.h>
+#include <pwd.h>
+#include <string.h>
+#include <sysdep.h>
+#include <unistd.h>
+
+uid_t getuid()
+{
+    return (uid_t)DO_SYSCALL_0(SYS_GETUID);
+}
+
+uid_t geteuid()
+{
+    return 0;
+}
+
+int setuid(uid_t uid)
+{
+    return DO_SYSCALL_1(SYS_SETUID, uid);
+}
+
+int setgid(gid_t gid)
+{
+    return DO_SYSCALL_1(SYS_SETGID, gid);
+}
+
+int setreuid(uid_t ruid, uid_t euid)
+{
+    return DO_SYSCALL_2(SYS_SETREUID, ruid, euid);
+}
+
+int setregid(gid_t rgid, gid_t egid)
+{
+    return DO_SYSCALL_2(SYS_SETREGID, rgid, egid);
+}
+
+static char loginbuf[128];
+char* getlogin()
+{
+    passwd_t* passwd = getpwuid(getuid());
+    strncpy(loginbuf, passwd->pw_name, 128);
+    endpwent();
+    return loginbuf;
+}