libc: make strerror() return "Unknown error" instead of an invalid pointer

libs/libc/include/errno.h

@@ -13,6 +13,7 @@ extern int errno;
 #define EISDIR 21 // Is a directory
 #define EINVAL 22 // Invalid argument
 #define EMFILE 24 // Too many open files
+#define EPIPE 32  // Broken pipe. Not implemented.
 #define ENOSYS 38 // Function not implemented
 
 #endif

libs/libc/include/inttypes.h

@@ -0,0 +1,21 @@
+#ifndef _INTTYPES_H
+#define _INTTYPES_H
+
+#include <stdint.h>
+
+#define PRId8 "%d"
+#define PRId16 "%d"
+#define PRId32 "%d"
+#define PRId64 "%ld"
+#define PRIdLEAST8 "%d"
+#define PRIdLEAST16 "%d"
+#define PRIdLEAST32 "%d"
+#define PRIdLEAST64 "%ld"
+#define PRIdFAST8 "%d"
+#define PRIdFAST16 "%d"
+#define PRIdFAST32 "%d"
+#define PRIdFAST64 "%ld"
+#define PRIdMAX "%ld"
+#define PRIdPTR "%ld"
+
+#endif

libs/libc/include/libgen.h

@@ -0,0 +1,16 @@
+#ifndef _LIBGEN_H
+#define _LIBGEN_H
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+    char* basename(char*); // Not implemented.
+    char* dirname(char*);  // Not implemented.
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

libs/libc/include/setjmp.h

@@ -0,0 +1,23 @@
+#ifndef _SETJMP_H
+#define _SETJMP_H
+
+#include <bits/macros.h>
+
+typedef int jmp_buf[1];
+typedef int sigjmp_buf[1];
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+    int setjmp(jmp_buf env);                                // Not implemented.
+    int sigsetjmp(sigjmp_buf env, int savesigs);            // Not implemented.
+    __lc_noreturn void longjmp(jmp_buf env, int val);       // Not implemented.
+    __lc_noreturn void siglongjmp(sigjmp_buf env, int val); // Not implemented.
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

libs/libc/include/signal.h

@@ -0,0 +1,7 @@
+#ifndef _SIGNAL_H
+#define _SIGNAL_H
+
+typedef int sig_atomic_t; // FIXME: Implement signals (I'm trying to build bc, this header is only to satisfy it) and
+                          // use a proper atomic integer type.
+
+#endif

libs/libc/src/libgen.cpp

@@ -0,0 +1,15 @@
+#include <libgen.h>
+#include <luna.h>
+
+extern "C"
+{
+    char* basename(char*)
+    {
+        NOT_IMPLEMENTED("basename");
+    }
+
+    char* dirname(char*)
+    {
+        NOT_IMPLEMENTED("dirname");
+    }
+}

libs/libc/src/setjmp.cpp

@@ -0,0 +1,25 @@
+#include <luna.h>
+#include <setjmp.h>
+
+extern "C"
+{
+    int setjmp(jmp_buf)
+    {
+        NOT_IMPLEMENTED("setjmp");
+    }
+
+    int sigsetjmp(sigjmp_buf, int)
+    {
+        NOT_IMPLEMENTED("sigsetjmp");
+    }
+
+    __lc_noreturn void longjmp(jmp_buf, int)
+    {
+        NOT_IMPLEMENTED("longjmp");
+    }
+
+    __lc_noreturn void siglongjmp(sigjmp_buf, int)
+    {
+        NOT_IMPLEMENTED("siglongjmp");
+    }
+}

libs/libc/src/string.cpp

@@ -176,7 +176,7 @@ extern "C"
         case ENOEXEC: return "Exec format error";
         case EFAULT: return "Bad address";
         case 0: return "Success";
-        default: return (char*)(unsigned long int)err;
+        default: return "Unknown error";
         }
     }