minix/servers/pfs/open.c

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#include "fs.h"
#include <sys/stat.h>
#include "buf.h"
#include "inode.h"
#include <minix/vfsif.h>
/*===========================================================================*
* fs_newnode *
*===========================================================================*/
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int fs_newnode(message *fs_m_in, message *fs_m_out)
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{
register int r = OK;
pmode_t bits;
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struct inode *rip;
uid_t uid;
gid_t gid;
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dev_t dev;
uid = (uid_t) fs_m_in->REQ_UID;
gid = (gid_t) fs_m_in->REQ_GID;
bits = (pmode_t) fs_m_in->REQ_MODE;
dev = fs_m_in->REQ_DEV;
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/* Try to allocate the inode */
if( (rip = alloc_inode(dev, bits, uid, gid) ) == NULL) return(err_code);
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switch (bits & S_IFMT) {
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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)) == NULL)
r = EIO;
break;
default:
r = EIO; /* Unsupported file type */
}
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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;
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}
return(r);
}