static struct ufs1_dinode *
get_inode(int fd, struct fs *super, ino_t ino)
{
static struct ufs1_dinode *ip;
static ino_t last;
if (fd < 0) { /* flush cache */
if (ip) {
free(ip);
ip = NULL;
}
return 0;
}
if (!ip || ino < last || ino >= last + INOCNT(super)) {
if (!ip
&& !(ip = (struct ufs1_dinode *)malloc(INOSZ(super))))
errx(1, "allocate inodes");
last = (ino / INOCNT(super)) * INOCNT(super);
if (lseek(fd, (off_t)ino_to_fsba(super, last) << super->fs_fshift, 0) < (off_t)0
|| read(fd,ip,INOSZ(super)) != (ssize_t)INOSZ(super))
err(1, "read inodes");
}
return ip + ino % INOCNT(super);
}
static union dinode *
get_inode(int fd, struct fs *super, ino_t ino)
{
static caddr_t ipbuf;
static struct cg *cgp;
static ino_t last;
static int cg;
struct ufs2_dinode *di2;
if (fd < 0) { /* flush cache */
if (ipbuf) {
free(ipbuf);
ipbuf = NULL;
if (super != NULL && super->fs_magic == FS_UFS2_MAGIC) {
free(cgp);
cgp = NULL;
}
}
return 0;
}
if (!ipbuf || ino < last || ino >= last + INOCNT(super)) {
if (super->fs_magic == FS_UFS2_MAGIC &&
(!cgp || cg != ino_to_cg(super, ino))) {
cg = ino_to_cg(super, ino);
if (!cgp && !(cgp = malloc(super->fs_cgsize)))
errx(1, "allocate cg");
if (pread(fd, cgp, super->fs_cgsize,
(off_t)cgtod(super, cg) << super->fs_fshift)
!= super->fs_cgsize)
if (read(fd, cgp, super->fs_cgsize) != super->fs_cgsize)
err(1, "read cg");
if (!cg_chkmagic(cgp))
errx(1, "cg has bad magic");
}
if (!ipbuf && !(ipbuf = malloc(INOSZ(super))))
err(1, "allocate inodes");
last = (ino / INOCNT(super)) * INOCNT(super);
if (lseek(fd, (off_t)ino_to_fsba(super, last)
<< super->fs_fshift, SEEK_SET) < 0 ||
read(fd, ipbuf, INOSZ(super)) != INOSZ(super)) {
err(1, "read inodes");
}
}
if (super->fs_magic == FS_UFS1_MAGIC)
return ((union dinode *)
&((struct ufs1_dinode *)ipbuf)[ino % INOCNT(super)]);
di2 = &((struct ufs2_dinode *)ipbuf)[ino % INOCNT(super)];
/* If the inode is unused, it might be unallocated too, so zero it. */
if (isclr(cg_inosused(cgp), ino % super->fs_ipg))
memset(di2, 0, sizeof(*di2));
return ((union dinode *)di2);
}