inode.h

Variables

inode             X

Macros

IACC              X
IALLOC            X
IEXEC             X
IFBLK             X
IFCHR             X
IFDIR             X
IFMT              X
ILARG             X
ILOCK             X
IMOUNT            X
IREAD             X
ISGID             X
ISUID             X
ISVTX             X
ITEXT             X
IUPD              X
IWANT             X
IWRITE            X

struct's

inode             X

   1: /*
   2:  * The I node is the focus of all
   3:  * file activity in unix. There is a unique
   4:  * inode allocated for each active file,
   5:  * each current directory, each mounted-on
   6:  * file, text file, and the root. An inode is 'named'
   7:  * by its dev/inumber pair. (iget/iget.c)
   8:  * Data, from mode on, is read in
   9:  * from permanent inode on volume.
  10:  */
  11: struct  inode
  12: {
  13:     char    i_flag;
  14:     char    i_count;    /* reference count */
  15:     int i_dev;      /* device where inode resides */
  16:     int i_number;   /* i number, 1-to-1 with device address */
  17:     int i_mode;
  18:     char    i_nlink;    /* directory entries */
  19:     char    i_uid;      /* owner */
  20:     char    i_gid;      /* group of owner */
  21:     char    i_size0;    /* most significant of size */
  22:     char    *i_size1;   /* least sig */
  23:     int i_addr[8];  /* device addresses constituting file */
  24:     int i_lastr;    /* last logical block read (for read-ahead) */
  25: } inode[NINODE];
  26: 
  27: /* flags */
  28: #define ILOCK   01      /* inode is locked */
  29: #define IUPD    02      /* inode has been modified */
  30: #define IACC    04      /* inode access time to be updated */
  31: #define IMOUNT  010     /* inode is mounted on */
  32: #define IWANT   020     /* some process waiting on lock */
  33: #define ITEXT   040     /* inode is pure text prototype */
  34: 
  35: /* modes */
  36: #define IALLOC  0100000     /* file is used */
  37: #define IFMT    060000      /* type of file */
  38: #define     IFDIR   040000  /* directory */
  39: #define     IFCHR   020000  /* character special */
  40: #define     IFBLK   060000  /* block special, 0 is regular */
  41: #define ILARG   010000      /* large addressing algorithm */
  42: #define ISUID   04000       /* set user id on execution */
  43: #define ISGID   02000       /* set group id on execution */
  44: #define ISVTX   01000       /* save swapped text even after use */
  45: #define IREAD   0400        /* read, write, execute permissions */
  46: #define IWRITE  0200
  47: #define IEXEC   0100