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socket: implement SOCK_CLOEXEC and SOCK_NONBLOCK

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Change-Id: I3fa36fa999c82a192d402cb4d913bd397e106e53
This commit is contained in:
Thomas Veerman 2013-02-25 11:36:29 +00:00
parent fd610ba1b0
commit fa78dc389f
7 changed files with 89 additions and 41 deletions
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63
lib/libc/sys-minix/socket.c
View file

@ -18,12 +18,17 @@ __weak_alias(socket, _socket)
#define DEBUG 0
static int _tcp_socket(int protocol);
static int _udp_socket(int protocol);
static int _tcp_socket(int type, int protocol);
static int _udp_socket(int type, int protocol);
static int _uds_socket(int type, int protocol);
static void _socket_flags(int type, int *result);
int socket(int domain, int type, int protocol)
{
int sock_type;
sock_type = type & ~SOCK_FLAGS_MASK;
#if DEBUG
fprintf(stderr, "socket: domain %d, type %d, protocol %d\n",
domain, type, protocol);
@ -37,15 +42,16 @@ int socket(int domain, int type, int protocol)
return -1;
}
if (domain == AF_UNIX && (type == SOCK_STREAM ||
type == SOCK_DGRAM || type == SOCK_SEQPACKET))
if (domain == AF_UNIX && (sock_type == SOCK_STREAM ||
sock_type == SOCK_DGRAM ||
sock_type == SOCK_SEQPACKET))
return _uds_socket(type, protocol);
if (domain == AF_INET && type == SOCK_STREAM)
return _tcp_socket(protocol);
if (domain == AF_INET && sock_type == SOCK_STREAM)
return _tcp_socket(type, protocol);
if (domain == AF_INET && type == SOCK_DGRAM)
return _udp_socket(protocol);
if (domain == AF_INET && sock_type == SOCK_DGRAM)
return _udp_socket(type, protocol);
#if DEBUG
fprintf(stderr, "socket: nothing for domain %d, type %d, protocol %d\n",
@ -55,9 +61,25 @@ int socket(int domain, int type, int protocol)
return -1;
}
static int _tcp_socket(int protocol)
static void
_socket_flags(int type, int *result)
{
int fd;
/* Process socket flags */
if (type & SOCK_CLOEXEC) {
*result |= O_CLOEXEC;
}
if (type & SOCK_NONBLOCK) {
*result |= O_NONBLOCK;
}
if (type & SOCK_NOSIGPIPE) {
*result |= O_NOSIGPIPE;
}
}
static int _tcp_socket(int type, int protocol)
{
int flags = O_RDWR;
if (protocol != 0 && protocol != IPPROTO_TCP)
{
#if DEBUG
@ -66,13 +88,15 @@ static int _tcp_socket(int protocol)
errno= EPROTONOSUPPORT;
return -1;
}
fd= open(TCP_DEVICE, O_RDWR);
return fd;
_socket_flags(type, &flags);
return open(TCP_DEVICE, flags);
}
static int _udp_socket(int protocol)
static int _udp_socket(int type, int protocol)
{
int r, fd, t_errno;
int r, fd, t_errno, flags = O_RDWR;
struct sockaddr_in sin;
if (protocol != 0 && protocol != IPPROTO_UDP)
@ -83,7 +107,8 @@ static int _udp_socket(int protocol)
errno= EPROTONOSUPPORT;
return -1;
}
fd= open(UDP_DEVICE, O_RDWR);
_socket_flags(type, &flags);
fd= open(UDP_DEVICE, flags);
if (fd == -1)
return fd;
@ -104,7 +129,7 @@ static int _udp_socket(int protocol)
static int _uds_socket(int type, int protocol)
{
int fd, r;
int fd, r, flags = O_RDWR, sock_type;
if (protocol != 0)
{
#if DEBUG
@ -114,7 +139,8 @@ static int _uds_socket(int type, int protocol)
return -1;
}
fd= open(UDS_DEVICE, O_RDWR);
_socket_flags(type, &flags);
fd= open(UDS_DEVICE, flags);
if (fd == -1) {
return fd;
}
@ -122,7 +148,8 @@ static int _uds_socket(int type, int protocol)
/* set the type for the socket via ioctl (SOCK_DGRAM,
* SOCK_STREAM, SOCK_SEQPACKET, etc)
*/
r= ioctl(fd, NWIOSUDSTYPE, &type);
sock_type = type & ~SOCK_FLAGS_MASK;
r= ioctl(fd, NWIOSUDSTYPE, &sock_type);
if (r == -1) {
int ioctl_errno;

11
servers/vfs/misc.c
View file

@ -286,7 +286,16 @@ int do_fcntl()
break;
}
case F_GETNOSIGPIPE:
/* POSIX: return value other than -1 is flag is set, else -1 */
r = -1;
if (f->filp_flags & O_NOSIGPIPE)
r = 0;
break;
case F_SETNOSIGPIPE:
fl = (O_NOSIGPIPE);
f->filp_flags = (f->filp_flags & ~fl) | (fcntl_argx & fl);
break;
default:
r = EINVAL;
}

9
servers/vfs/pipe.c
View file

@ -174,7 +174,7 @@ endpoint_t map_to_fs_e;
* pipe_check *
*===========================================================================*/
int pipe_check(
struct vnode *vp, /* the inode of the pipe */
struct filp *filp, /* the filp of the pipe */
int rw_flag, /* READING or WRITING */
int oflags, /* flags set by open or fcntl */
int bytes, /* bytes to be read or written (all chunks) */
@ -186,9 +186,12 @@ int notouch /* check only */
* and there is no writer, return 0 bytes. If a process is writing to a
* pipe and no one is reading from it, give a broken pipe error.
*/
struct vnode *vp;
off_t pos;
int r = OK;
vp = filp->filp_vno;
/* Reads start at the beginning; writes append to pipes */
if (notouch) /* In this case we don't actually care whether data transfer
* would succeed. See POSIX 1003.1-2008 */
@ -221,10 +224,6 @@ int notouch /* check only */
/* Process is writing to a pipe. */
if (find_filp(vp, R_BIT) == NULL) {
/* Process is writing, but there is no reader. Tell kernel to generate
* a SIGPIPE signal. */
if (!notouch) sys_kill(fp->fp_endpoint, SIGPIPE);
return(EPIPE);
}

2
servers/vfs/proto.h
View file

@ -186,7 +186,7 @@ int do_check_perms(void);
int do_pipe(void);
int map_vnode(struct vnode *vp, endpoint_t fs_e);
void unpause(endpoint_t proc_e);
int pipe_check(struct vnode *vp, int rw_flag, int oflags, int bytes,
int pipe_check(struct filp *filp, int rw_flag, int oflags, int bytes,
int notouch);
void release(struct vnode *vp, int op, int count);
void revive(endpoint_t proc_e, int returned);

33
servers/vfs/read.c
View file

@ -124,27 +124,23 @@ int read_write(int rw_flag, struct filp *f, char *buf, size_t size,
register struct vnode *vp;
u64_t position, res_pos, new_pos;
unsigned int cum_io, cum_io_incr, res_cum_io;
int op, oflags, r;
int op, r;
position = f->filp_pos;
oflags = f->filp_flags;
vp = f->filp_vno;
r = OK;
cum_io = 0;
if (size > SSIZE_MAX) return(EINVAL);
if (S_ISFIFO(vp->v_mode)) {
op = (rw_flag == READING ? VFS_DEV_READ : VFS_DEV_WRITE);
if (S_ISFIFO(vp->v_mode)) { /* Pipes */
if (fp->fp_cum_io_partial != 0) {
panic("VFS: read_write: fp_cum_io_partial not clear");
}
r = rw_pipe(rw_flag, for_e, f, buf, size);
return(r);
}
op = (rw_flag == READING ? VFS_DEV_READ : VFS_DEV_WRITE);
if (S_ISCHR(vp->v_mode)) { /* Character special files. */
} else if (S_ISCHR(vp->v_mode)) { /* Character special files. */
dev_t dev;
int suspend_reopen;
@ -154,7 +150,7 @@ int read_write(int rw_flag, struct filp *f, char *buf, size_t size,
suspend_reopen = (f->filp_state & FS_NEEDS_REOPEN);
dev = (dev_t) vp->v_sdev;
r = dev_io(op, dev, for_e, buf, position, size, oflags,
r = dev_io(op, dev, for_e, buf, position, size, f->filp_flags,
suspend_reopen);
if (r >= 0) {
cum_io = r;
@ -178,7 +174,7 @@ int read_write(int rw_flag, struct filp *f, char *buf, size_t size,
} else { /* Regular files */
if (rw_flag == WRITING) {
/* Check for O_APPEND flag. */
if (oflags & O_APPEND) position = cvul64(vp->v_size);
if (f->filp_flags & O_APPEND) position = cvul64(vp->v_size);
}
/* Issue request */
@ -208,7 +204,18 @@ int read_write(int rw_flag, struct filp *f, char *buf, size_t size,
f->filp_pos = position;
if (r == OK) return(cum_io);
if (r == EPIPE && rw_flag == WRITING) {
/* Process is writing, but there is no reader. Tell the kernel to
* generate s SIGPIPE signal.
*/
if (!(f->filp_flags & O_NOSIGPIPE)) {
sys_kill(fp->fp_endpoint, SIGPIPE);
}
}
if (r == OK) {
return(cum_io);
}
return(r);
}
@ -277,7 +284,7 @@ size_t req_size;
/* fp->fp_cum_io_partial is only nonzero when doing partial writes */
cum_io = fp->fp_cum_io_partial;
r = pipe_check(vp, rw_flag, oflags, req_size, 0);
r = pipe_check(f, rw_flag, oflags, req_size, 0);
if (r <= 0) {
if (r == SUSPEND) pipe_suspend(f, buf, req_size);
return(r);

4
servers/vfs/select.c
View file

@ -453,7 +453,7 @@ static int select_request_pipe(struct filp *f, int *ops, int block)
if ((*ops & (SEL_RD|SEL_ERR))) {
/* Check if we can read 1 byte */
err = pipe_check(f->filp_vno, READING, f->filp_flags & ~O_NONBLOCK, 1,
err = pipe_check(f, READING, f->filp_flags & ~O_NONBLOCK, 1,
1 /* Check only */);
if (err != SUSPEND)
@ -470,7 +470,7 @@ static int select_request_pipe(struct filp *f, int *ops, int block)
if ((*ops & (SEL_WR|SEL_ERR))) {
/* Check if we can write 1 byte */
err = pipe_check(f->filp_vno, WRITING, f->filp_flags & ~O_NONBLOCK, 1,
err = pipe_check(f, WRITING, f->filp_flags & ~O_NONBLOCK, 1,
1 /* Check only */);
if (err != SUSPEND)

8
sys/sys/fcntl.h
View file

@ -73,7 +73,9 @@
* restart
*/
#define O_CLOEXEC 020000 /* close on exec */
#if defined(_NETBSD_SOURCE)
#define O_NOSIGPIPE 040000 /* don't deliver sigpipe */
#endif
#ifndef __minix /* NOT SUPPORTED! */
#if defined(_NETBSD_SOURCE)
@ -126,6 +128,10 @@
#define F_SETLK 6 /* set record locking information */
#define F_SETLKW 7 /* set record locking info; wait if blocked */
#define F_FREESP 8 /* free a section of a regular file */
#if defined(_NETBSD_SOURCE)
#define F_GETNOSIGPIPE 9
#define F_SETNOSIGPIPE 10
#endif
/* File descriptor flags used for fcntl(). POSIX Table 6-2. */
#define FD_CLOEXEC 1 /* close on exec flag for third arg of fcntl */