points to a null-terminated string naming
is the address of a 36(10) byte buffer
into which information is placed concerning the file.
It is unnecessary to have any
permissions at all with respect to the file, but all directories
leading to the file must be readable.
has the following structure (starting offset given in bytes):
char minor; /* +0: minor device of i-node */
char major; /* +1: major device */
int flags; /* +4: see below */
char nlinks; /* +6: number of links to file */
char uid; /* +7: user ID of owner */
char gid; /* +8: group ID of owner */
char size0; /* +9: high byte of 24-bit size */
int size1; /* +10: low word of 24-bit size */
int addr[8]; /* +12: block numbers or device number */
int actime[2]; /* +28: time of last access */
int modtime[2]; /* +32: time of last modification */
The flags are as follows:
100000 i-node is allocated
020000 character-type special file
060000 block-type special file.
004000 set user-ID on execution
002000 set group-ID on execution
001000 save text image after execution
000070 read, write, execute (group)
000007 read, write, execute (others)
ls (I), fstat (II), fs (V)
is set if the file cannot be found.
From C, a \*-1 return indicates an error.
projects / unix-history / blob