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