System hardening and errno impl

2 files changed, 51 insertions, 0 deletions

diff --git a/libc/inc/errno.h b/libc/inc/errno.h
new file mode 100644
index 0000000..76b4b85
--- /dev/null
+++ b/libc/inc/errno.h
@@ -0,0 +1,49 @@
+// MIT License, Copyright (c) 2021 Marvin Borner
+
+#ifndef ERRNO_H
+#define ERRNO_H
+
+#include <def.h>
+
+#define EPERM 1 /* Operation not permitted */
+#define ENOENT 2 /* No such file or directory */
+#define ESRCH 3 /* No such process */
+#define EINTR 4 /* Interrupted system call */
+#define EIO 5 /* I/O error */
+#define ENXIO 6 /* No such device or address */
+#define E2BIG 7 /* Argument list too long */
+#define ENOEXEC 8 /* Exec format error */
+#define EBADF 9 /* Bad file number */
+#define ECHILD 10 /* No child processes */
+#define EAGAIN 11 /* Try again */
+#define ENOMEM 12 /* Out of memory */
+#define EACCES 13 /* Permission denied */
+#define EFAULT 14 /* Bad address */
+#define ENOTBLK 15 /* Block device required */
+#define EBUSY 16 /* Device or resource busy */
+#define EEXIST 17 /* File exists */
+#define EXDEV 18 /* Cross-device link */
+#define ENODEV 19 /* No such device */
+#define ENOTDIR 20 /* Not a directory */
+#define EISDIR 21 /* Is a directory */
+#define EINVAL 22 /* Invalid argument */
+#define ENFILE 23 /* File table overflow */
+#define EMFILE 24 /* Too many open files */
+#define ENOTTY 25 /* Not a typewriter */
+#define ETXTBSY 26 /* Text file busy */
+#define EFBIG 27 /* File too large */
+#define ENOSPC 28 /* No space left on device */
+#define ESPIPE 29 /* Illegal seek */
+#define EROFS 30 /* Read-only file system */
+#define EMLINK 31 /* Too many links */
+#define EPIPE 32 /* Broken pipe */
+#define EDOM 33 /* Math argument out of domain of func */
+#define ERANGE 34 /* Math result not representable */
+#define EMAX 35 /* Max errno */
+
+#ifdef userspace
+#define errno (*__errno())
+extern u32 *__errno(void);
+#endif
+
+#endif
diff --git a/libc/inc/str.h b/libc/inc/str.h
index 0ef49a6..d0a521f 100644
--- a/libc/inc/str.h
+++ b/libc/inc/str.h
@@ -17,4 +17,6 @@ int strncmp(const char *s1, const char *s2, u32 n);
 char *strinv(char *s);
 char *strdup(const char *s);
 
+const char *strerror(u32 err);
+
 #endif