minix/servers/mfs/stadir.c

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#include "fs.h"
#include <sys/stat.h>
#include <sys/statfs.h>
#include <minix/com.h>
#include <string.h>
#include "buf.h"
#include "inode.h"
#include "super.h"
#include <minix/vfsif.h>
FORWARD _PROTOTYPE( int stat_inode, (struct inode *rip, int pipe_pos,
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int who_e, cp_grant_id_t gid) );
/*===========================================================================*
* stat_inode *
*===========================================================================*/
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PRIVATE int stat_inode(rip, pipe_pos, who_e, gid)
register struct inode *rip; /* pointer to inode to stat */
int pipe_pos; /* position in a pipe, supplied by fstat() */
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int who_e; /* Caller endpoint */
cp_grant_id_t gid; /* grant for the stat buf */
{
/* Common code for stat and fstat system calls. */
struct stat statbuf;
mode_t mo;
int r, s;
/* Update the atime, ctime, and mtime fields in the inode, if need be. */
if (rip->i_update) update_times(rip);
/* Fill in the statbuf struct. */
mo = rip->i_mode & I_TYPE;
/* true iff special */
s = (mo == I_CHAR_SPECIAL || mo == I_BLOCK_SPECIAL);
statbuf.st_dev = rip->i_dev;
statbuf.st_ino = rip->i_num;
statbuf.st_mode = rip->i_mode;
statbuf.st_nlink = rip->i_nlinks;
statbuf.st_uid = rip->i_uid;
statbuf.st_gid = rip->i_gid;
statbuf.st_rdev = (dev_t) (s ? rip->i_zone[0] : NO_DEV);
statbuf.st_size = rip->i_size;
if (rip->i_pipe == I_PIPE) {
statbuf.st_mode &= ~I_REGULAR; /* wipe out I_REGULAR bit for pipes */
statbuf.st_size -= pipe_pos;
}
statbuf.st_atime = rip->i_atime;
statbuf.st_mtime = rip->i_mtime;
statbuf.st_ctime = rip->i_ctime;
/* Copy the struct to user space. */
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r = sys_safecopyto(who_e, gid, 0, (vir_bytes) &statbuf,
(phys_bytes) sizeof(statbuf), D);
return(r);
}
/*===========================================================================*
* fs_fstatfs *
*===========================================================================*/
PUBLIC int fs_fstatfs()
{
struct statfs st;
struct inode *rip;
int r;
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if ((rip = find_inode(fs_dev, fs_m_in.REQ_FD_INODE_NR))
== NIL_INODE) {
printf("FSfstatfs: couldn't find inode %d\n", fs_m_in.REQ_FD_INODE_NR);
return EINVAL;
}
st.f_bsize = rip->i_sp->s_block_size;
/* Copy the struct to user space. */
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r = sys_safecopyto(fs_m_in.m_source, fs_m_in.REQ_GRANT, 0,
(vir_bytes) &st, (phys_bytes) sizeof(st), D);
return(r);
}
/*===========================================================================*
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* fs_stat *
*===========================================================================*/
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PUBLIC int fs_stat()
{
register int r; /* return value */
register struct inode *rip; /* target inode */
if ( (rip = get_inode(fs_dev, fs_m_in.REQ_INODE_NR)) == NIL_INODE) {
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printf("MFS(%d) get_inode by fs_stat() failed\n", SELF_E);
return(EINVAL);
}
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r = stat_inode(rip, 0, fs_m_in.m_source, fs_m_in.REQ_GRANT);
put_inode(rip); /* release the inode */
return(r);
}