minix/servers/iso9660fs/stadir.c

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#include "inc.h"
#include <assert.h>
#include <sys/stat.h>
#include <sys/statfs.h>
#include <sys/statvfs.h>
#include <minix/com.h>
#include <string.h>
#include <time.h>
#include <minix/vfsif.h>
/*===========================================================================*
* stat_dir_record *
*===========================================================================*/
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static int stat_dir_record(
register struct dir_record *dir, /* pointer to dir record to stat */
int pipe_pos, /* position in a pipe, supplied by fstat() */
endpoint_t who_e, /* Caller endpoint */
cp_grant_id_t gid /* grant for the stat buf */
)
{
/* This function returns all the info about a particular inode. It's missing
* the recording date because of a bug in the standard functions stdtime.
* Once the bug is fixed the function can be called inside this function to
* return the date. */
/* Common code for stat and fstat system calls. */
struct stat statbuf;
int r;
struct tm ltime;
time_t time1;
u32_t blocks;
blocks = v_pri.volume_space_size_l;
/* The unit of blocks should be 512 */
assert(v_pri.logical_block_size_l >= 512);
blocks = blocks * (v_pri.logical_block_size_l >> 9);
memset(&statbuf, 0, sizeof(struct stat));
statbuf.st_dev = fs_dev; /* the device of the file */
statbuf.st_ino = ID_DIR_RECORD(dir); /* the id of the dir record */
statbuf.st_mode = dir->d_mode; /* flags of the file */
statbuf.st_nlink = dir->d_count; /* times this file is used */
statbuf.st_uid = 0; /* user root */
statbuf.st_gid = 0; /* group operator */
statbuf.st_rdev = NO_DEV;
statbuf.st_size = dir->d_file_size; /* size of the file */
statbuf.st_blksize = v_pri.logical_block_size_l;
statbuf.st_blocks = blocks;
ltime.tm_year = dir->rec_date[0];
ltime.tm_mon = dir->rec_date[1] - 1;
ltime.tm_mday = dir->rec_date[2];
ltime.tm_hour = dir->rec_date[3];
ltime.tm_min = dir->rec_date[4];
ltime.tm_sec = dir->rec_date[5];
ltime.tm_isdst = 0;
if (dir->rec_date[6] != 0)
ltime.tm_hour += dir->rec_date[6] / 4;
time1 = mktime(&ltime);
statbuf.st_atime = time1;
statbuf.st_mtime = time1;
statbuf.st_ctime = time1;
/* Copy the struct to user space. */
r = sys_safecopyto(who_e, gid, 0, (vir_bytes) &statbuf,
(phys_bytes) sizeof(statbuf));
return(r);
}
/*===========================================================================*
* fs_stat *
*===========================================================================*/
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int fs_stat()
{
register int r; /* return value */
struct dir_record *dir;
r = EINVAL;
if ((dir = get_dir_record(fs_m_in.REQ_INODE_NR)) != NULL) {
r = stat_dir_record(dir, 0, fs_m_in.m_source, fs_m_in.REQ_GRANT);
release_dir_record(dir);
}
return(r);
}
/*===========================================================================*
* fs_fstatfs *
*===========================================================================*/
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int fs_fstatfs()
{
struct statfs st;
int r;
st.f_bsize = v_pri.logical_block_size_l;
/* Copy the struct to user space. */
r = sys_safecopyto(fs_m_in.m_source, fs_m_in.REQ_GRANT, 0,
(vir_bytes) &st, (phys_bytes) sizeof(st));
return(r);
}
/*===========================================================================*
* fs_statvfs *
*===========================================================================*/
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int fs_statvfs()
{
struct statvfs st;
int r;
st.f_bsize = v_pri.logical_block_size_l;
st.f_frsize = st.f_bsize;
st.f_blocks = v_pri.volume_space_size_l;
st.f_bfree = 0;
st.f_bavail = 0;
st.f_files = 0;
st.f_ffree = 0;
st.f_favail = 0;
st.f_fsid = fs_dev;
st.f_flag = ST_RDONLY;
st.f_namemax = NAME_MAX;
/* Copy the struct to user space. */
r = sys_safecopyto(fs_m_in.m_source, fs_m_in.REQ_GRANT, 0, (vir_bytes) &st,
(phys_bytes) sizeof(st));
return(r);
}
/*===========================================================================*
* blockstats *
*===========================================================================*/
void fs_blockstats(u32_t *blocks, u32_t *free, u32_t *used)
{
*used = *blocks = v_pri.volume_space_size_l;
*free = 0;
}