58 lines
1.5 KiB
C
58 lines
1.5 KiB
C
|
|
#include "fs.h"
|
|
#include <fcntl.h>
|
|
#include <signal.h>
|
|
#include <minix/callnr.h>
|
|
#include <minix/endpoint.h>
|
|
#include <minix/com.h>
|
|
#include <sys/select.h>
|
|
#include <sys/time.h>
|
|
#include "inode.h"
|
|
#include "super.h"
|
|
|
|
#include <minix/vfsif.h>
|
|
|
|
|
|
|
|
/*===========================================================================*
|
|
* fs_pipe *
|
|
*===========================================================================*/
|
|
PUBLIC int fs_pipe(void)
|
|
{
|
|
struct inode *rip;
|
|
|
|
/* Get caller's user and group id from the request */
|
|
caller_uid = fs_m_in.REQ_UID;
|
|
caller_gid = fs_m_in.REQ_GID;
|
|
|
|
/* Try to allocate the inode */
|
|
if ( (rip = alloc_inode(fs_dev, I_REGULAR) ) == NIL_INODE) {
|
|
return err_code;
|
|
}
|
|
|
|
/* !!! already checked in alloc_inode
|
|
if (read_only(rip) != OK)
|
|
panic(__FILE__,"pipe device is read only", NO_NUM);
|
|
*/
|
|
|
|
/* Fill in the fields of the inode */
|
|
rip->i_pipe = I_PIPE;
|
|
rip->i_mode &= ~I_REGULAR;
|
|
rip->i_mode |= I_NAMED_PIPE; /* pipes and FIFOs have this bit set */
|
|
|
|
/* We'll need it twice, nothing can go wrong here */
|
|
dup_inode(rip);
|
|
rw_inode(rip, WRITING); /* mark inode as allocated */
|
|
rip->i_update = ATIME | CTIME | MTIME;
|
|
|
|
/* Fill in the fields of the response message */
|
|
fs_m_out.m_source = fs_dev; /* filled with FS endpoint by the system */
|
|
fs_m_out.RES_INODE_NR = rip->i_num;
|
|
fs_m_out.RES_MODE = rip->i_mode;
|
|
fs_m_out.RES_INODE_INDEX = (rip - &inode[0]) / sizeof(struct inode);
|
|
|
|
return OK;
|
|
}
|
|
|
|
|