1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586 |
- /* Copyright (C) 1987 by Prentice-Hall, Inc. Permission is hereby granted to
- * private individuals and educational institutions to modify and
- * redistribute the binary and source programs of this system to other
- * private individuals and educational institutions for educational and
- * research purposes. For corporate or commercial use, permission from
- * Prentice-Hall is required. In general, such permission will be granted,
- * subject to a few conditions.
- */
- #define EXTERN extern /* used in *.h files */
- #define PRIVATE static /* PRIVATE x limits the scope of x */
- #define PUBLIC /* PUBLIC is the opposite of PRIVATE */
- #define FORWARD static /* some compilers require this to be 'static' */
- #define TRUE 1 /* used for turning integers into Booleans */
- #define FALSE 0 /* used for turning integers into Booleans */
- #define HZ 60 /* clock freq (software settable on IBM-PC) */
- #define BLOCK_SIZE 1024 /* # bytes in a disk block */
- #define SUPER_USER (uid) 0 /* uid of superuser */
- #define MAJOR 8 /* major device = (dev>>MAJOR) & 0377 */
- #define MINOR 0 /* minor device = (dev>>MINOR) & 0377 */
- #define NR_TASKS 8 /* number of tasks in the transfer vector */
- #define NR_PROCS 16 /* number of slots in proc table */
- #define NR_SEGS 3 /* # segments per process */
- #define T 0 /* proc[i].mem_map[T] is for text */
- #define D 1 /* proc[i].mem_map[D] is for data */
- #define S 2 /* proc[i].mem_map[S] is for stack */
- #define MAX_P_LONG 2147483647 /* maximum positive long, i.e. 2**31 - 1 */
- /* Memory is allocated in clicks. */
- #ifdef i8088
- #define CLICK_SIZE 0020 /* unit in which memory is allocated */
- #define CLICK_SHIFT 4 /* log2 of CLICK_SIZE */
- #endif
- #ifdef ATARI_ST
- #define CLICK_SIZE 256 /* unit in which memory is allocated */
- #define CLICK_SHIFT 8 /* log2 of CLICK_SIZE */
- #endif
- /* Process numbers of some important processes */
- #define MM_PROC_NR 0 /* process number of memory manager */
- #define FS_PROC_NR 1 /* process number of file system */
- #define INIT_PROC_NR 2 /* init -- the process that goes multiuser */
- #define LOW_USER 2 /* first user not part of operating system */
- /* Miscellaneous */
- #define BYTE 0377 /* mask for 8 bits */
- #define TO_USER 0 /* flag telling to copy from fs to user */
- #define FROM_USER 1 /* flag telling to copy from user to fs */
- #define READING 0 /* copy data to user */
- #define WRITING 1 /* copy data from user */
- #ifndef ATARI_ST
- #define ABS -999 /* this process means absolute memory */
- #endif
- #define WORD_SIZE 2 /* number of bytes per word */
- #define NIL_PTR (char *) 0 /* generally useful expression */
- #define NO_NUM 0x8000 /* used as numerical argument to panic() */
- #define MAX_PATH 128 /* max length of path names */
- #define SIG_PUSH_BYTES 8 /* how many bytes pushed by signal */
- #define MAX_ISTACK_BYTES 1024 /* maximum initial stack size for EXEC */
- /* Device numbers of root (RAM) and boot (fd0) devices. */
- #define ROOT_DEV (dev_nr) 256 /* major-minor device number of root dev */
- #define BOOT_DEV (dev_nr) 512 /* major-minor device number of boot diskette */
- /* Flag bits for i_mode in the inode. */
- #define I_TYPE 0170000 /* this field gives inode type */
- #define I_REGULAR 0100000 /* regular file, not dir or special */
- #define I_BLOCK_SPECIAL 0060000 /* block special file */
- #define I_DIRECTORY 0040000 /* file is a directory */
- #define I_CHAR_SPECIAL 0020000 /* character special file */
- #define I_SET_UID_BIT 0004000 /* set effective uid on exec */
- #define I_SET_GID_BIT 0002000 /* set effective gid on exec */
- #define ALL_MODES 0006777 /* all bits for user, group and others */
- #define RWX_MODES 0000777 /* mode bits for RWX only */
- #define R_BIT 0000004 /* Rwx protection bit */
- #define W_BIT 0000002 /* rWx protection bit */
- #define X_BIT 0000001 /* rwX protection bit */
- #define I_NOT_ALLOC 0000000 /* this inode is free */
|