syscalls.c File Reference

#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <sys/select.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <poll.h>
#include <stdio.h>
#include <time.h>
#include <termios.h>
#include <signal.h>
#include <dirent.h>
#include <netdb.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <net/if.h>
#include <miniOS/syscall.h>
#include <errno.h>
#include <stddef.h>
#include <stdint.h>
#include <stdarg.h>
#include <string.h>
#include <stdlib.h>
#include <fcntl.h>

Include dependency graph for syscalls.c:

Classes
struct	__dirstream
struct	sysinfo

Macros
#define	DIR_BUF_SIZE   4096
#define	DNS_PORT   53
#define	DNS_TIMEOUT_MS   5000
#define	DNS_BUF_SIZE   512
#define	DNS_NAME_MAX   256
#define	DNS_MAX_CHAIN   8

Typedefs
typedef void(*	_miniOS_sighandler_t) (int)

Functions
static long	inline_syscall (long nr, long arg1, long arg2, long arg3)
static long	inline_syscall6 (long nr, long arg1, long arg2, long arg3, long arg4, long arg5, long arg6)
void *	_sbrk (ptrdiff_t incr)
void *	sbrk (ptrdiff_t incr)
ssize_t	_write (int fd, const void *buf, size_t count)
ssize_t	write (int fd, const void *buf, size_t count)
ssize_t	_read (int fd, void *buf, size_t count)
ssize_t	read (int fd, void *buf, size_t count)
int	_open (const char *path, int flags,...)
int	open (const char *path, int flags,...)
int	_close (int fd)
int	close (int fd)
off_t	_lseek (int fd, off_t offset, int whence)
off_t	lseek (int fd, off_t offset, int whence)
void	_exit (int code)
void	exit (int code)
int	_fstat (int fd, struct stat *st)
int	fstat (int fd, struct stat *st)
int	_stat (const char *path, struct stat *st)
int	stat (const char *path, struct stat *st)
pid_t	_getpid (void)
pid_t	getpid (void)
pid_t	getppid (void)
pid_t	setsid (void)
int	setpgid (pid_t pid, pid_t pgid)
int	kill (pid_t pid, int sig)
pid_t	fork (void)
int	exec (const char *path)
int	execve (const char *path, char *const *argv, char *const *envp)
int	execv (const char *path, char *const *argv)
static const char *	_find_colon (const char *s)
static const char *	_find_slash (const char *s)
int	execvp (const char *file, char *const *argv)
pid_t	waitpid (pid_t pid, int *status, int options)
pid_t	_libc_wait (int *status)
int	pipe (int fds[2])
int	dup (int oldfd)
int	dup2 (int oldfd, int newfd)
int	_ioctl (int fd, unsigned long request, void *arg)
int	ioctl (int fd, unsigned long request,...)
long	getdents (int fd, void *buf, unsigned int count)
void *	mmap (void *addr, size_t len, int prot, int flags, int fd, long offset)
int	munmap (void *addr, size_t len)
int	mount (const char *source, const char *target, const char *fstype, unsigned long flags, const void *data)
int	umount (const char *target)
int	mkdir (const char *path, mode_t mode)
int	rmdir (const char *path)
int	unlink (const char *path)
int	access (const char *path, int mode)
_miniOS_sighandler_t	signal (int sig, _miniOS_sighandler_t handler)
int	sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
int	chdir (const char *path)
char *	getcwd (char *buf, size_t size)
int	poll (struct pollfd *fds, unsigned int nfds, int timeout)
int	select (int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout)
int	fcntl (int fd, int cmd,...)
int	lstat (const char *path, struct stat *st)
ssize_t	readlink (const char *path, char *buf, size_t bufsiz)
unsigned int	sleep (unsigned int seconds)
int	nanosleep (const struct timespec *req, struct timespec *rem)
unsigned	alarm (unsigned seconds)
int	setitimer (int which, const struct itimerval *new_value, struct itimerval *old_value)
int	tcsetpgrp (int fd, pid_t pgrp)
pid_t	tcgetpgrp (int fd)
unsigned int	if_nametoindex (const char *ifname)
char *	if_indextoname (unsigned int ifindex, char *ifname)
struct if_nameindex *	if_nameindex (void)
void	if_freenameindex (struct if_nameindex *ptr)
int	clock_gettime (clockid_t clockid, struct timespec *tp)
int	sched_getcpu (void)
int	fchdir (int fd)
int	chroot (const char *path)
int	settimeofday (const struct timeval *tv, const struct timezone *tz)
int	setuid (unsigned int uid)
int	setgid (unsigned int gid)
int	seteuid (unsigned int euid)
int	setegid (unsigned int egid)
int	setgroups (int size, const unsigned int *list)
int	vfork (void)
int	link (const char *oldpath, const char *newpath)
int	socket (int domain, int type, int protocol)
int	bind (int sockfd, const struct sockaddr *addr, socklen_t addrlen)
int	listen (int sockfd, int backlog)
ssize_t	sendto (int sockfd, const void *buf, size_t len, int flags, const struct sockaddr *dest_addr, socklen_t addrlen)
int	ttyname_r (int fd, char *buf, size_t buflen)
char *	realpath (const char *path, char *resolved)
DIR *	opendir (const char *path)
struct dirent *	readdir (DIR *dirp)
int	closedir (DIR *dirp)
void	rewinddir (DIR *dirp)
int	connect (int fd, const struct sockaddr *addr, socklen_t addrlen)
ssize_t	recvfrom (int sockfd, void *buf, size_t len, int flags, struct sockaddr *src_addr, socklen_t *addrlen)
ssize_t	recv (int sockfd, void *buf, size_t len, int flags)
int	setsockopt (int fd, int level, int optname, const void *optval, socklen_t optlen)
int	getsockopt (int fd, int level, int optname, void *optval, socklen_t *optlen)
int	getsockname (int fd, struct sockaddr *addr, socklen_t *addrlen)
int	getpeername (int fd, struct sockaddr *addr, socklen_t *addrlen)
int	shutdown (int sockfd, int how)
int	accept (int sockfd, struct sockaddr *addr, socklen_t *addrlen)
static int	streq (const char *a, const char *b)
static char *	dup_cstr (const char *src)
static int	parse_ipv4_octet (const char **cpp, unsigned *out)
in_addr_t	inet_addr (const char *cp)
int	inet_aton (const char *cp, struct in_addr *inp)
char *	inet_ntoa (struct in_addr in)
static int	parse_numeric_service (const char *service, int socktype, int *out_port)
struct servent *	getservbyname (const char *name, const char *proto)
static uint32_t	dns_read_nameserver (void)
static int	dns_encode_name (const char *name, uint8_t *out, int outlen)
static int	dns_decode_name (const uint8_t *pkt, int pktlen, int off, char *out, int outlen)
static int	dns_nameeq (const char *a, const char *b)
static int	resolve_ipv4_hostname (const char *node, struct in_addr *out_addr)
struct hostent *	gethostbyname (const char *name)
int	getaddrinfo (const char *node, const char *service, const struct addrinfo *hints, struct addrinfo **res)
void	freeaddrinfo (struct addrinfo *res)
int	getnameinfo (const struct sockaddr *addr, unsigned int addrlen, char *host, unsigned int hostlen, char *serv, unsigned int servlen, int flags)
int	prctl (int option,...)
int	sysinfo (struct sysinfo *info)

Variables
static char *	_brk_ptr
int	h_errno
char **	environ
static struct servent	g_service
static char *	g_service_aliases [] = { NULL }
static struct hostent	g_hostent
static char *	g_hostent_aliases [] = { NULL }
static char *	g_hostent_addr_list [] = { NULL, NULL }
static struct in_addr	g_hostent_addr
static char	g_hostent_name [256]

Macro Definition Documentation

DIR_BUF_SIZE

#define DIR_BUF_SIZE   4096

DNS_BUF_SIZE

#define DNS_BUF_SIZE   512

DNS_MAX_CHAIN

#define DNS_MAX_CHAIN   8

DNS_NAME_MAX

#define DNS_NAME_MAX   256

DNS_PORT

#define DNS_PORT   53

DNS_TIMEOUT_MS

#define DNS_TIMEOUT_MS   5000

Typedef Documentation

_miniOS_sighandler_t

typedef void(* _miniOS_sighandler_t) (int)

Function Documentation

_close()

int _close

(

int

fd

)

Here is the call graph for this function:

Here is the caller graph for this function:

_exit()

void _exit

(

int

code

)

Here is the call graph for this function:

Here is the caller graph for this function:

_find_colon()

const char * _find_colon ( const char * s )

static

Here is the caller graph for this function:

_find_slash()

const char * _find_slash ( const char * s )

static

Here is the caller graph for this function:

_fstat()

int _fstat	(	int	fd,
		struct stat *	st )

Here is the call graph for this function:

Here is the caller graph for this function:

_getpid()

pid_t _getpid

(

void

)

Here is the call graph for this function:

Here is the caller graph for this function:

_ioctl()

int _ioctl	(	int	fd,
		unsigned long	request,
		void *	arg )

Here is the call graph for this function:

Here is the caller graph for this function:

_libc_wait()

pid_t _libc_wait

(

int *

status

)

Here is the call graph for this function:

Here is the caller graph for this function:

_lseek()

off_t _lseek	(	int	fd,
		off_t	offset,
		int	whence )

Here is the call graph for this function:

Here is the caller graph for this function:

_open()

int _open	(	const char *	path,
		int	flags,
			... )

Here is the call graph for this function:

Here is the caller graph for this function:

_read()

ssize_t _read	(	int	fd,
		void *	buf,
		size_t	count )

Here is the call graph for this function:

Here is the caller graph for this function:

_sbrk()

void * _sbrk

(

ptrdiff_t

incr

)

Here is the call graph for this function:

Here is the caller graph for this function:

_stat()

int _stat	(	const char *	path,
		struct stat *	st )

Here is the call graph for this function:

Here is the caller graph for this function:

_write()

ssize_t _write	(	int	fd,
		const void *	buf,
		size_t	count )

Here is the call graph for this function:

Here is the caller graph for this function:

accept()

int accept	(	int	sockfd,
		struct sockaddr *	addr,
		socklen_t *	addrlen )

Here is the call graph for this function:

Here is the caller graph for this function:

access()

int access	(	const char *	path,
		int	mode )

Here is the call graph for this function:

alarm()

unsigned alarm

(

unsigned

seconds

)

Here is the call graph for this function:

Here is the caller graph for this function:

bind()

int bind	(	int	sockfd,
		const struct sockaddr *	addr,
		socklen_t	addrlen )

Here is the call graph for this function:

Here is the caller graph for this function:

chdir()

int chdir

(

const char *

path

)

Here is the call graph for this function:

Here is the caller graph for this function:

chroot()

int chroot

(

const char *

path

)

Here is the call graph for this function:

clock_gettime()

int clock_gettime	(	clockid_t	clockid,
		struct timespec *	tp )

Here is the call graph for this function:

Here is the caller graph for this function:

close()

int close

(

int

fd

)

Here is the call graph for this function:

Here is the caller graph for this function:

closedir()

int closedir

(

DIR *

dirp

)

Here is the call graph for this function:

connect()

int connect	(	int	fd,
		const struct sockaddr *	addr,
		socklen_t	addrlen )

Here is the call graph for this function:

Here is the caller graph for this function:

dns_decode_name()

int dns_decode_name ( const uint8_t * pkt, int pktlen, int off, char * out, int outlen )

static

Here is the caller graph for this function:

dns_encode_name()

int dns_encode_name ( const char * name, uint8_t * out, int outlen )

static

Here is the call graph for this function:

Here is the caller graph for this function:

dns_nameeq()

int dns_nameeq ( const char * a, const char * b )

static

Here is the caller graph for this function:

dns_read_nameserver()

uint32_t dns_read_nameserver ( void )

static

Here is the call graph for this function:

Here is the caller graph for this function:

dup()

int dup

(

int

oldfd

)

Here is the call graph for this function:

Here is the caller graph for this function:

dup2()

int dup2	(	int	oldfd,
		int	newfd )

Here is the call graph for this function:

Here is the caller graph for this function:

dup_cstr()

char * dup_cstr ( const char * src )

static

Here is the call graph for this function:

Here is the caller graph for this function:

exec()

int exec

(

const char *

path

)

Here is the call graph for this function:

execv()

int execv	(	const char *	path,
		char *const *	argv )

Here is the call graph for this function:

execve()

int execve	(	const char *	path,
		char *const *	argv,
		char *const *	envp )

Here is the call graph for this function:

Here is the caller graph for this function:

execvp()

int execvp	(	const char *	file,
		char *const *	argv )

Here is the call graph for this function:

exit()

void exit

(

int

code

)

Here is the call graph for this function:

fchdir()

int fchdir

(

int

fd

)

Here is the call graph for this function:

fcntl()

int fcntl	(	int	fd,
		int	cmd,
			... )

Here is the call graph for this function:

Here is the caller graph for this function:

fork()

pid_t fork

(

void

)

Here is the call graph for this function:

Here is the caller graph for this function:

freeaddrinfo()

void freeaddrinfo

(

struct addrinfo *

res

)

fstat()

int fstat	(	int	fd,
		struct stat *	st )

Here is the call graph for this function:

Here is the caller graph for this function:

getaddrinfo()

int getaddrinfo	(	const char *	node,
		const char *	service,
		const struct addrinfo *	hints,
		struct addrinfo **	res )

Here is the call graph for this function:

getcwd()

char * getcwd	(	char *	buf,
		size_t	size )

Here is the call graph for this function:

getdents()

long getdents	(	int	fd,
		void *	buf,
		unsigned int	count )

Here is the call graph for this function:

gethostbyname()

struct hostent * gethostbyname

(

const char *

name

)

Here is the call graph for this function:

getnameinfo()

int getnameinfo	(	const struct sockaddr *	addr,
		unsigned int	addrlen,
		char *	host,
		unsigned int	hostlen,
		char *	serv,
		unsigned int	servlen,
		int	flags )

Here is the call graph for this function:

getpeername()

int getpeername	(	int	fd,
		struct sockaddr *	addr,
		socklen_t *	addrlen )

Here is the call graph for this function:

getpid()

pid_t getpid

(

void

)

Here is the call graph for this function:

Here is the caller graph for this function:

getppid()

pid_t getppid

(

void

)

Here is the call graph for this function:

Here is the caller graph for this function:

getservbyname()

struct servent * getservbyname	(	const char *	name,
		const char *	proto )

Here is the call graph for this function:

Here is the caller graph for this function:

getsockname()

int getsockname	(	int	fd,
		struct sockaddr *	addr,
		socklen_t *	addrlen )

Here is the call graph for this function:

Here is the caller graph for this function:

getsockopt()

int getsockopt	(	int	fd,
		int	level,
		int	optname,
		void *	optval,
		socklen_t *	optlen )

Here is the call graph for this function:

if_freenameindex()

void if_freenameindex

(

struct if_nameindex *

ptr

)

Here is the call graph for this function:

if_indextoname()

char * if_indextoname	(	unsigned int	ifindex,
		char *	ifname )

Here is the call graph for this function:

if_nameindex()

struct if_nameindex * if_nameindex

(

void

)

Here is the call graph for this function:

Here is the caller graph for this function:

if_nametoindex()

unsigned int if_nametoindex

(

const char *

ifname

)

inet_addr()

in_addr_t inet_addr

(

const char *

cp

)

Here is the call graph for this function:

inet_aton()

int inet_aton	(	const char *	cp,
		struct in_addr *	inp )

Here is the call graph for this function:

Here is the caller graph for this function:

inet_ntoa()

char * inet_ntoa

(

struct in_addr

in

)

Here is the caller graph for this function:

inline_syscall()

long inline_syscall ( long nr, long arg1, long arg2, long arg3 )

inlinestatic

inline_syscall6()

long inline_syscall6 ( long nr, long arg1, long arg2, long arg3, long arg4, long arg5, long arg6 )

inlinestatic

Here is the caller graph for this function:

ioctl()

int ioctl	(	int	fd,
		unsigned long	request,
			... )

Here is the call graph for this function:

Here is the caller graph for this function:

kill()

int kill	(	pid_t	pid,
		int	sig )

Here is the call graph for this function:

link()

int link	(	const char *	oldpath,
		const char *	newpath )

Here is the call graph for this function:

listen()

int listen	(	int	sockfd,
		int	backlog )

Here is the call graph for this function:

Here is the caller graph for this function:

lseek()

off_t lseek	(	int	fd,
		off_t	offset,
		int	whence )

Here is the call graph for this function:

Here is the caller graph for this function:

lstat()

int lstat	(	const char *	path,
		struct stat *	st )

Here is the call graph for this function:

Here is the caller graph for this function:

mkdir()

int mkdir	(	const char *	path,
		mode_t	mode )

Here is the call graph for this function:

Here is the caller graph for this function:

mmap()

void * mmap	(	void *	addr,
		size_t	len,
		int	prot,
		int	flags,
		int	fd,
		long	offset )

Here is the call graph for this function:

Here is the caller graph for this function:

mount()

int mount	(	const char *	source,
		const char *	target,
		const char *	fstype,
		unsigned long	flags,
		const void *	data )

Here is the call graph for this function:

munmap()

int munmap	(	void *	addr,
		size_t	len )

Here is the call graph for this function:

Here is the caller graph for this function:

nanosleep()

int nanosleep	(	const struct timespec *	req,
		struct timespec *	rem )

Here is the call graph for this function:

Here is the caller graph for this function:

open()

int open	(	const char *	path,
		int	flags,
			... )

Here is the call graph for this function:

Here is the caller graph for this function:

opendir()

DIR * opendir

(

const char *

path

)

Here is the call graph for this function:

parse_ipv4_octet()

int parse_ipv4_octet ( const char ** cpp, unsigned * out )

static

Here is the caller graph for this function:

parse_numeric_service()

int parse_numeric_service ( const char * service, int socktype, int * out_port )

static

Here is the caller graph for this function:

pipe()

int pipe

(

int

fds[2]

)

Here is the call graph for this function:

Here is the caller graph for this function:

poll()

int poll	(	struct pollfd *	fds,
		unsigned int	nfds,
		int	timeout )

Here is the call graph for this function:

Here is the caller graph for this function:

prctl()

int prctl	(	int	option,
			... )

read()

ssize_t read	(	int	fd,
		void *	buf,
		size_t	count )

Here is the call graph for this function:

Here is the caller graph for this function:

readdir()

struct dirent * readdir

(

DIR *

dirp

)

Here is the call graph for this function:

readlink()

ssize_t readlink	(	const char *	path,
		char *	buf,
		size_t	bufsiz )

Here is the call graph for this function:

Here is the caller graph for this function:

realpath()

char * realpath	(	const char *	path,
		char *	resolved )

Here is the call graph for this function:

recv()

ssize_t recv	(	int	sockfd,
		void *	buf,
		size_t	len,
		int	flags )

Here is the call graph for this function:

Here is the caller graph for this function:

recvfrom()

ssize_t recvfrom	(	int	sockfd,
		void *	buf,
		size_t	len,
		int	flags,
		struct sockaddr *	src_addr,
		socklen_t *	addrlen )

Here is the caller graph for this function:

resolve_ipv4_hostname()

int resolve_ipv4_hostname ( const char * node, struct in_addr * out_addr )

static

Here is the call graph for this function:

Here is the caller graph for this function:

rewinddir()

void rewinddir

(

DIR *

dirp

)

Here is the call graph for this function:

rmdir()

int rmdir

(

const char *

path

)

Here is the call graph for this function:

sbrk()

void * sbrk

(

ptrdiff_t

incr

)

Here is the call graph for this function:

sched_getcpu()

int sched_getcpu

(

void

)

Here is the call graph for this function:

select()

int select	(	int	nfds,
		fd_set *	readfds,
		fd_set *	writefds,
		fd_set *	exceptfds,
		struct timeval *	timeout )

Here is the call graph for this function:

sendto()

ssize_t sendto	(	int	sockfd,
		const void *	buf,
		size_t	len,
		int	flags,
		const struct sockaddr *	dest_addr,
		socklen_t	addrlen )

Here is the caller graph for this function:

setegid()

int setegid

(

unsigned int

egid

)

Here is the call graph for this function:

seteuid()

int seteuid

(

unsigned int

euid

)

Here is the call graph for this function:

setgid()

int setgid

(

unsigned int

gid

)

Here is the call graph for this function:

setgroups()

int setgroups	(	int	size,
		const unsigned int *	list )

Here is the call graph for this function:

setitimer()

int setitimer	(	int	which,
		const struct itimerval *	new_value,
		struct itimerval *	old_value )

Here is the call graph for this function:

Here is the caller graph for this function:

setpgid()

int setpgid	(	pid_t	pid,
		pid_t	pgid )

Here is the call graph for this function:

setsid()

pid_t setsid

(

void

)

Here is the call graph for this function:

Here is the caller graph for this function:

setsockopt()

int setsockopt	(	int	fd,
		int	level,
		int	optname,
		const void *	optval,
		socklen_t	optlen )

Here is the call graph for this function:

settimeofday()

int settimeofday	(	const struct timeval *	tv,
		const struct timezone *	tz )

Here is the call graph for this function:

setuid()

int setuid

(

unsigned int

uid

)

Here is the call graph for this function:

shutdown()

int shutdown	(	int	sockfd,
		int	how )

Here is the call graph for this function:

sigaction()

int sigaction	(	int	sig,
		const struct sigaction *	act,
		struct sigaction *	oact )

Here is the call graph for this function:

Here is the caller graph for this function:

signal()

_miniOS_sighandler_t signal	(	int	sig,
		_miniOS_sighandler_t	handler )

Here is the call graph for this function:

Here is the caller graph for this function:

sleep()

unsigned int sleep

(

unsigned int

seconds

)

Here is the call graph for this function:

Here is the caller graph for this function:

socket()

int socket	(	int	domain,
		int	type,
		int	protocol )

Here is the call graph for this function:

Here is the caller graph for this function:

stat()

int stat	(	const char *	path,
		struct stat *	st )

Here is the call graph for this function:

Here is the caller graph for this function:

streq()

int streq ( const char * a, const char * b )

static

Here is the caller graph for this function:

sysinfo()

int sysinfo

(

struct sysinfo *

info

)

Here is the call graph for this function:

tcgetpgrp()

pid_t tcgetpgrp

(

int

fd

)

Here is the call graph for this function:

tcsetpgrp()

int tcsetpgrp	(	int	fd,
		pid_t	pgrp )

Here is the call graph for this function:

ttyname_r()

int ttyname_r	(	int	fd,
		char *	buf,
		size_t	buflen )

umount()

int umount

(

const char *

target

)

Here is the call graph for this function:

unlink()

int unlink

(

const char *

path

)

Here is the call graph for this function:

Here is the caller graph for this function:

vfork()

int vfork

(

void

)

Here is the call graph for this function:

waitpid()

pid_t waitpid	(	pid_t	pid,
		int *	status,
		int	options )

Here is the call graph for this function:

Here is the caller graph for this function:

write()

ssize_t write	(	int	fd,
		const void *	buf,
		size_t	count )

Here is the call graph for this function:

Here is the caller graph for this function:

Variable Documentation

_brk_ptr

char* _brk_ptr

static

environ

char** environ

extern

g_hostent

struct hostent g_hostent

static

g_hostent_addr

struct in_addr g_hostent_addr

static

g_hostent_addr_list

char* g_hostent_addr_list[] = { NULL, NULL }

static

g_hostent_aliases

char* g_hostent_aliases[] = { NULL }

static

g_hostent_name

char g_hostent_name[256]

static

g_service

struct servent g_service

static

g_service_aliases

char* g_service_aliases[] = { NULL }

static

h_errno

int h_errno