minix/servers/pfs/open.c

56 lines
1.2 KiB
C

#include "fs.h"
#include <sys/stat.h>
#include <unistd.h>
#include <minix/callnr.h>
#include <minix/com.h>
#include "buf.h"
#include "inode.h"
#include <minix/vfsif.h>
/*===========================================================================*
* fs_newnode *
*===========================================================================*/
PUBLIC int fs_newnode()
{
register int r = OK;
mode_t bits;
struct inode *rip;
dev_t dev;
caller_uid = fs_m_in.REQ_UID;
caller_gid = fs_m_in.REQ_GID;
bits = fs_m_in.REQ_MODE;
dev = fs_m_in.REQ_DEV;
/* Try to allocate the inode */
if( (rip = alloc_inode(dev, bits) ) == NIL_INODE) return(err_code);
switch (bits & S_IFMT) {
case S_IFBLK:
case S_IFCHR:
rip->i_rdev = dev; /* Major/minor dev numbers */
break;
case S_IFIFO:
if ((get_block(dev, rip->i_num)) == NIL_BUF)
r = EIO;
break;
default:
r = EIO; /* Unsupported file type */
}
if (r != OK) {
free_inode(rip);
} else {
/* Fill in the fields of the response message */
fs_m_out.RES_INODE_NR = rip->i_num;
fs_m_out.RES_MODE = rip->i_mode;
fs_m_out.RES_FILE_SIZE_LO = rip->i_size;
fs_m_out.RES_UID = rip->i_uid;
fs_m_out.RES_GID = rip->i_gid;
fs_m_out.RES_DEV = dev;
}
return(r);
}