Add sys$gethostname and /bin/hostname

LibC/errno.h

@@ -1,42 +1,6 @@
 #pragma once
 
-#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 EOVERFLOW 75    // Value too large for defined data type
-
+#include <Kernel/errno.h>
 
 #define __RETURN_WITH_ERRNO(rc, good_ret, bad_ret) \
     do { \

LibC/string.cpp

@@ -50,6 +50,7 @@ const char* strerror(int errnum)
     case EPIPE: return "Broken pipe";
     case EDOM: return "Math argument out of domain";
     case ERANGE: return "Math result not representable";
+    case ENAMETOOLONG: return "Name too long";
     case EOVERFLOW: return "Value too large for data type";
     }
     printf("strerror() missing string for errnum=%d\n", errnum);

LibC/unistd.cpp

@@ -62,5 +62,11 @@ int sleep(unsigned seconds)
     return Syscall::invoke(Syscall::Sleep, (dword)seconds);
 }
 
+int gethostname(char* buffer, size_t size)
+{
+    int rc = Syscall::invoke(Syscall::PosixGethostname, (dword)buffer, (dword)size);
+    __RETURN_WITH_ERRNO(rc, rc, -1);
+}
+
 }
 

LibC/unistd.h

@@ -14,6 +14,9 @@ pid_t waitpid(pid_t);
 char* getcwd(char* buffer, size_t size);
 int lstat(const char* path, stat* statbuf);
 int sleep(unsigned seconds);
+int gethostname(char*, size_t);
+
+#define HOST_NAME_MAX 64
 
 #define	S_IFMT 0170000
 #define	S_IFDIR 0040000