posix_8h_source.html

#ifndef __FS_POSIX_H

#define __FS_POSIX_H


#include <fs/vfs.h>


/* The usual file operations (fs/posix/), which most filesystems and

 * devices use: they call the vnode's operations. */


int     posix_file_open(struct file *file);

int     posix_file_close(struct file *file);

ssize_t posix_file_read(struct file *file, struct iobuf *io);

ssize_t posix_file_write(struct file *file, struct iobuf *io);

ssize_t posix_file_readdir(struct file *file, struct dirent *dirent);

int     posix_file_ioctl(struct file *file, int request, void *argp);

off_t   posix_file_lseek(struct file *file, off_t offset, int whence);

int     posix_file_trunc(struct file *file, off_t len);


int     posix_file_eof(struct file *file);


#endif /* ! __FS_POSIX_H */

posix_file_eof
int posix_file_eof(struct file *file)
Says whether a file's offset is at or past its end, so that a read returns nothing.
Definition helpers.c:17

posix_file_lseek
off_t posix_file_lseek(struct file *file, off_t offset, int whence)
Moves an open file's offset: to offset (SEEK_SET), by offset from where it is (SEEK_CUR),...
Definition lseek.c:22

posix_file_open
int posix_file_open(struct file *file)
Finishes opening a file: with O_TRUNC, a regular file is truncated to 0 bytes.
Definition open.c:17

posix_file_close
int posix_file_close(struct file *file)
Closes an open file by dropping its reference to its vnode.
Definition close.c:15

posix_file_ioctl
int posix_file_ioctl(struct file *file, int request, void *argp)
Passes an ioctl() request on to the file's vnode (a device's, or its filesystem's).
Definition ioctl.c:19

posix_file_read
ssize_t posix_file_read(struct file *file, struct iobuf *io)
Reads from an open file at its offset, and moves the offset past what was read.
Definition read.c:29

posix_file_readdir
ssize_t posix_file_readdir(struct file *file, struct dirent *dirent)
Reads the directory entry at an open directory's offset, and moves the offset past it.
Definition readdir.c:22

posix_file_trunc
int posix_file_trunc(struct file *file, off_t len)
Truncates (or extends) an open file to a new length.
Definition trunc.c:16

posix_file_write
ssize_t posix_file_write(struct file *file, struct iobuf *io)
Writes to an open file at its offset, and moves the offset past what was written.
Definition write.c:25

file
An open file (POSIX's "open file description", fs/file.c).
Definition vfs.h:157

iobuf
An iobuf.
Definition iobuf.h:35

ssize_t
long int ssize_t
Definition types.h:12

off_t
long int off_t
Definition types.h:10

vfs.h