kernel+libc: Add uname()

kernel/CMakeLists.txt

@@ -37,6 +37,7 @@ set(SOURCES
     src/sys/stat.cpp
     src/sys/chdir.cpp
     src/sys/link.cpp
+    src/sys/uname.cpp
     src/fs/VFS.cpp
     src/fs/tmpfs/FileSystem.cpp
     src/fs/devices/DeviceRegistry.cpp

kernel/src/sys/uname.cpp

@@ -0,0 +1,25 @@
+#include "arch/CPU.h"
+#include "memory/MemoryManager.h"
+#include "sys/Syscall.h"
+#include <bits/struct_utsname.h>
+#include <luna/CString.h>
+
+Result<u64> sys_uname(Registers*, SyscallArgs args)
+{
+    utsname* buf = (utsname*)args[0];
+
+    utsname result;
+
+    strncpy(result.sysname, "moon", _UTSNAME_LENGTH);
+    strncpy(result.nodename, "lunar", _UTSNAME_LENGTH);
+
+    // FIXME: Hardcode these at build time instead of in code.
+    strncpy(result.release, "0.1", _UTSNAME_LENGTH);
+    strncpy(result.version, "alpha", _UTSNAME_LENGTH);
+
+    strncpy(result.machine, CPU::platform_string(), _UTSNAME_LENGTH);
+
+    if (!MemoryManager::copy_to_user_typed(buf, &result)) return err(EFAULT);
+
+    return 0;
+}

libc/include/bits/struct_utsname.h

@@ -0,0 +1,17 @@
+/* bits/struct_utsname.h: The utsname structure. */
+
+#ifndef _BITS_STRUCT_UTSNAME_H
+#define _BITS_STRUCT_UTSNAME_H
+
+#define _UTSNAME_LENGTH 256
+
+struct utsname
+{
+    char sysname[_UTSNAME_LENGTH];
+    char nodename[_UTSNAME_LENGTH];
+    char release[_UTSNAME_LENGTH];
+    char version[_UTSNAME_LENGTH];
+    char machine[_UTSNAME_LENGTH];
+};
+
+#endif

libc/include/sys/utsname.h

@@ -0,0 +1,20 @@
+/* sys/utsname.h: Kernel name and information. */
+
+#ifndef _SYS_UTSNAME_H
+#define _SYS_UTSNAME_H
+
+#include <bits/struct_utsname.h>
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+    /* Get kernel name and information. */
+    int uname(struct utsname* buf);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

libluna/include/luna/Syscall.h

@@ -4,7 +4,7 @@
     _e(exit) _e(clock_gettime) _e(mmap) _e(munmap) _e(usleep) _e(openat) _e(close) _e(read) _e(getpid) _e(write)       \
         _e(lseek) _e(mkdir) _e(execve) _e(mknod) _e(fork) _e(waitpid) _e(getppid) _e(fcntl) _e(getdents) _e(getuid)    \
             _e(geteuid) _e(getgid) _e(getegid) _e(setuid) _e(setgid) _e(seteuid) _e(setegid) _e(chmod) _e(chown)       \
-                _e(ioctl) _e(fstatat) _e(chdir) _e(getcwd) _e(unlinkat)
+                _e(ioctl) _e(fstatat) _e(chdir) _e(getcwd) _e(unlinkat) _e(uname)
 
 enum Syscalls
 {