d3/d8d/user_8c_source.html

#include "user.h"


#include "common/clock.h"

#include "common/exit_stack.h"

#include "common/std_streams.h"

#include "common/threading.h"

#include "user/common/file.h"

#include "user/common/note.h"


#include <sys/fs.h>

#include <sys/proc.h>


static void _populate_std_descriptors(void)

{

    for (uint64_t i = 0; i <= STDERR_FILENO; i++)

    {

        if (write(i, NULL, 0) == ERR && errno == EBADF)

        {

            fd_t nullFd = open("/dev/const/null");

            if (nullFd != i)

            {

                dup2(nullFd, i);

                close(nullFd);

            }

        }

    }

}


void _user_init(void)

{

    _clock_init();

    _threading_init();

    _populate_std_descriptors();

    _exit_stack_init();

    _files_init();

    _std_streams_init();

    _note_init();

}


_exit_stack_init
void _exit_stack_init(void)
Definition exit_stack.c:9

exit_stack.h

_threading_init
void _threading_init(void)
Definition threading.c:63

_user_init
void _user_init(void)
Definition user.c:29

errno
#define errno
Error number variable.
Definition errno.h:27

EBADF
#define EBADF
Bad file number.
Definition errno.h:77

dup2
fd_t dup2(fd_t oldFd, fd_t newFd)
System call for duplicating file descriptors, with a destination.
Definition dup2.c:8

open
fd_t open(const char *path)
System call for opening files.
Definition open.c:8

close
uint64_t close(fd_t fd)
System call for closing files.
Definition close.c:8

write
size_t write(fd_t fd, const void *buffer, size_t count)
System call for writing to files.
Definition write.c:8

STDERR_FILENO
#define STDERR_FILENO
Standard error file descriptor.
Definition fs.h:37

NULL
#define NULL
Pointer error value.
Definition NULL.h:25

ERR
#define ERR
Integer error value.
Definition ERR.h:17

fd_t
__UINT64_TYPE__ fd_t
File descriptor type.
Definition fd_t.h:10

fs.h

_clock_init
void _clock_init(void)
Definition clock.c:7

_files_init
void _files_init(void)
Definition file.c:254

_note_init
void _note_init(void)
Definition note.c:68

proc.h

clock.h

file.h

note.h

_std_streams_init
void _std_streams_init(void)
Definition std_streams.c:36

std_streams.h

uint64_t
__UINT64_TYPE__ uint64_t
Definition stdint.h:17

threading.h

_populate_std_descriptors
static void _populate_std_descriptors(void)
Definition user.c:13

user.h