minix/lib/nbsd_libc/sys-minix/stat.c

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#include <sys/cdefs.h>
#include "namespace.h"
#include <lib.h>
#include <sys/stat.h>
#include <string.h>
/* XXX until that st_Xtime macroses used, we have to undefine them,
* because of minix_prev_stat
*/
#undef st_atime
#undef st_ctime
#undef st_mtime
static void prev_stat2new_stat(struct stat *new, struct minix_prev_stat *prev)
{
/* Copy field by field because of st_gid type mismath and
* difference in order after atime.
*/
new->st_dev = prev->st_dev;
new->st_ino = prev->st_ino;
new->st_mode = prev->st_mode;
new->st_nlink = prev->st_nlink;
new->st_uid = prev->st_uid;
new->st_gid = prev->st_gid;
new->st_rdev = prev->st_rdev;
new->st_size = prev->st_size;
new->st_atimespec.tv_sec = prev->st_atime;
new->st_mtimespec.tv_sec = prev->st_mtime;
new->st_ctimespec.tv_sec = prev->st_ctime;
}
int _stat(name, buffer)
const char *name;
struct stat *buffer;
{
message m;
int r;
struct minix_prev_stat old_sb;
m.m1_i1 = strlen(name) + 1;
m.m1_p1 = (char *) name;
m.m1_p2 = (char *) buffer;
if((r = _syscall(VFS_PROC_NR, STAT, &m)) >= 0 || errno != ENOSYS)
return r;
errno = 0;
/* ENOSYS: new binary and old VFS, fallback to PREV_STAT.
* User has struct stat (buffer), VFS still fills minix_prev_stat.
*/
m.m1_i1 = strlen(name) + 1;
m.m1_p1 = (char *) name;
m.m1_p2 = (char *) &old_sb;
if((r = _syscall(VFS_PROC_NR, PREV_STAT, &m)) < 0)
return r;
memset(buffer, 0, sizeof(struct stat));
prev_stat2new_stat(buffer, &old_sb);
return r;
}
int _fstat(fd, buffer)
int fd;
struct stat *buffer;
{
message m;
int r;
struct minix_prev_stat old_sb;
m.m1_i1 = fd;
m.m1_p1 = (char *) buffer;
if((r = _syscall(VFS_PROC_NR, FSTAT, &m)) >= 0 || errno != ENOSYS)
return r;
errno = 0;
/* ENOSYS: new binary and old VFS, fallback to PREV_STAT.
* User has struct stat (buffer), VFS still fills minix_prev_stat.
*/
m.m1_i1 = fd;
m.m1_p1 = (char *) &old_sb;
if((r = _syscall(VFS_PROC_NR, PREV_FSTAT, &m)) < 0)
return r;
memset(buffer, 0, sizeof(struct stat));
prev_stat2new_stat(buffer, &old_sb);
return r;
}
int _lstat(name, buffer)
const char *name;
struct stat *buffer;
{
message m;
int r;
struct minix_prev_stat old_sb;
m.m1_i1 = strlen(name) + 1;
m.m1_p1 = (char *) name;
m.m1_p2 = (char *) buffer;
if((r = _syscall(VFS_PROC_NR, LSTAT, &m)) >= 0 || errno != ENOSYS)
return r;
errno = 0;
/* ENOSYS: new binary and old VFS, fallback to PREV_STAT.
* User has struct stat (buffer), VFS still fills minix_prev_stat.
*/
m.m1_i1 = strlen(name) + 1;
m.m1_p1 = (char *) name;
m.m1_p2 = (char *) &old_sb;
if((r = _syscall(VFS_PROC_NR, PREV_LSTAT, &m)) < 0)
return r;
memset(buffer, 0, sizeof(struct stat));
prev_stat2new_stat(buffer, &old_sb);
return r;
}