2.11BSD/src/usr.sbin/mkproto/mkproto.c
/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/
#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1980 Regents of the University of California.\n\
All rights reserved.\n";
static char sccsid[] = "@(#)mkproto.c 5.1 (Berkeley) 5/28/85";
#endif not lint
/*
* Make a file system prototype.
* usage: mkproto filsys proto
*
* Files written to the new filesystem may be up to 4kb less than the
* max single indirect size: 256kb.
*/
#include <stdio.h>
#include <sys/param.h>
#undef EXTERNALITIMES /* Need full inode definiton */
#include <sys/inode.h>
#include <sys/fs.h>
#include <sys/dir.h>
union {
struct fs fs;
char fsx[DEV_BSIZE];
} ufs;
#define sblock ufs.fs
struct fs *fs;
int fso, fsi;
FILE *proto;
char token[BUFSIZ];
int errs;
ino_t ino = 10;
int flshroot;
long getnum();
char *strcpy();
daddr_t alloc();
time_t time();
main(argc, argv)
int argc;
char *argv[];
{
int i;
if (argc != 3) {
fprintf(stderr, "usage: mkproto filsys proto\n");
exit(1);
}
fso = open(argv[1], 1);
fsi = open(argv[1], 0);
if (fso < 0 || fsi < 0) {
perror(argv[1]);
exit(1);
}
fs = &sblock;
rdfs(SBLOCK, (char *)fs);
proto = fopen(argv[2], "r");
descend((struct inode *)0);
wtfs(SBLOCK, (char *)fs);
exit(errs);
}
descend(par)
struct inode *par;
{
struct inode in;
int ibc = 0, dbc = 0;
int i, f, c;
struct dinode *dip, inos[MAXBSIZE / sizeof (struct dinode)];
daddr_t ib[MAXBSIZE / sizeof (daddr_t)];
char buf[MAXBSIZE];
getstr();
in.i_mode = gmode(token[0], "-bcd", IFREG, IFBLK, IFCHR, IFDIR);
in.i_mode |= gmode(token[1], "-u", 0, ISUID, 0, 0);
in.i_mode |= gmode(token[2], "-g", 0, ISGID, 0, 0);
for (i = 3; i < 6; i++) {
c = token[i];
if (c < '0' || c > '7') {
printf("%c/%s: bad octal mode digit\n", c, token);
errs++;
c = 0;
}
in.i_mode |= (c-'0')<<(15-3*i);
}
in.i_uid = getnum(); in.i_gid = getnum();
in.i_nlink = 1;
in.i_size = 0;
bzero(in.i_addr, NADDR * sizeof (daddr_t));
bzero(buf, sizeof (buf));
bzero(ib, sizeof (ib));
if (par != (struct inode *)0) {
ialloc(&in);
} else {
par = ∈
i = itod(ROOTINO);
rdfs((daddr_t) i, (char *)inos);
dip = &inos[itoo(ROOTINO)];
in.i_number = ROOTINO;
in.i_nlink = dip->di_nlink;
in.i_size = dip->di_size;
in.i_db[0] = dip->di_addr[0];
ib[0] = in.i_db[0]; /* rootino has 1st block assigned */
ibc = 1; /* preserve it when iput is done */
rdfs(in.i_db[0], buf);
flshroot = 1;
}
switch (in.i_mode&IFMT) {
case IFREG:
getstr();
f = open(token, 0);
if (f < 0) {
printf("%s: cannot open\n", token);
errs++;
break;
}
while ((i = read(f, buf, DEV_BSIZE)) > 0) {
in.i_size += i;
newblk(buf, &ibc, ib, &dbc);
}
close(f);
break;
case IFBLK:
case IFCHR:
/*
* special file
* content is maj/min types
*/
i = getnum() & 0377;
f = getnum() & 0377;
in.i_rdev = (i << 8) | f;
break;
case IFDIR:
/*
* directory
* put in extra links
* call recursively until
* name of "$" found
*/
if (in.i_number != ROOTINO) {
par->i_nlink++;
in.i_nlink++;
entry(&in, in.i_number, ".", buf, &ibc, ib, &dbc);
entry(&in, par->i_number, "..", buf, &ibc, ib, &dbc);
}
for (;;) {
getstr();
if (token[0]=='$' && token[1]=='\0')
break;
entry(&in, ino+1, token, buf, &ibc, ib, &dbc);
descend(&in);
}
if (dbc) {
if (in.i_number == ROOTINO && flshroot)
wtfs(in.i_db[0], buf);
else
newblk(buf, &ibc, ib, &dbc);
}
break;
}
iput(&in, &ibc, ib);
}
/*ARGSUSED*/
gmode(c, s, m0, m1, m2, m3)
char c, *s;
{
int i;
for (i = 0; s[i]; i++)
if (c == s[i])
return((&m0)[i]);
printf("%c/%s: bad mode\n", c, token);
errs++;
return(0);
}
long
getnum()
{
int i, c;
long n;
getstr();
n = 0;
i = 0;
for (i = 0; c=token[i]; i++) {
if (c<'0' || c>'9') {
printf("%s: bad number\n", token);
errs++;
return((long)0);
}
n = n*10 + (c-'0');
}
return(n);
}
getstr()
{
int i, c;
loop:
switch (c = getc(proto)) {
case ' ':
case '\t':
case '\n':
goto loop;
case EOF:
printf("Unexpected EOF\n");
exit(1);
case ':':
while (getc(proto) != '\n')
;
goto loop;
}
i = 0;
do {
token[i++] = c;
c = getc(proto);
} while (c != ' ' && c != '\t' && c != '\n' && c != '\0');
token[i] = 0;
}
entry(ip, inum, str, buf, aibc, ib, adbc)
struct inode *ip;
ino_t inum;
char *str;
char *buf;
int *aibc;
daddr_t *ib;
int *adbc;
{
register struct direct *dp, *odp;
int oldsize, newsize, spacefree;
u_short diroff = ip->i_size & DEV_BMASK;
odp = dp = (struct direct *)buf;
while ((int)dp - (int)buf < diroff) {
odp = dp;
dp = (struct direct *)((int)dp + dp->d_reclen);
}
if (odp != dp)
oldsize = DIRSIZ(odp);
else
oldsize = 0;
spacefree = odp->d_reclen - oldsize;
dp = (struct direct *)((int)odp + oldsize);
dp->d_ino = inum;
dp->d_namlen = strlen(str);
newsize = DIRSIZ(dp);
if (spacefree >= newsize) {
odp->d_reclen = oldsize;
dp->d_reclen = spacefree;
} else {
dp = (struct direct *)((int)odp + odp->d_reclen);
if ((int)dp - (int)buf >= DEV_BSIZE) {
if (ip->i_number == ROOTINO && flshroot) {
flshroot = 0;
wtfs(ip->i_addr[0], buf);
bzero(buf, DEV_BSIZE);
}
else
newblk(buf, aibc, ib, adbc);
dp = (struct direct *)(&buf[DIRBLKSIZ]);
dp->d_reclen = DIRBLKSIZ;
dp = (struct direct *)buf;
}
dp->d_ino = inum;
dp->d_namlen = strlen(str);
dp->d_reclen = DIRBLKSIZ;
}
strcpy(dp->d_name, str);
ip->i_size = (int)dp - (int)buf + newsize;
(*adbc)++;
}
newblk(buf, aibc, ib, adbc)
int *aibc;
char *buf;
daddr_t *ib;
int *adbc;
{
daddr_t bno;
bno = alloc();
wtfs(bno, buf);
bzero(buf, DEV_BSIZE);
ib[(*aibc)++] = bno;
if (*aibc >= NINDIR) {
printf("indirect block full\n");
errs++;
*aibc = 0;
*adbc = 0;
}
}
iput(ip, aibc, ib)
register struct inode *ip;
int *aibc;
daddr_t *ib;
{
daddr_t d;
register int i, off;
struct dinode buf[MAXBSIZE / sizeof (struct dinode)];
ip->i_atime = ip->i_mtime = ip->i_ctime = time((long *)0);
switch (ip->i_mode&IFMT) {
case IFDIR:
case IFREG:
for (i = 0; i < *aibc; i++) {
if (i >= NDADDR)
break;
ip->i_db[i] = ib[i];
}
if (*aibc > NDADDR) {
ip->i_ib[0] = alloc();
for (i = 0; i < NINDIR - NDADDR; i++) {
ib[i] = ib[i+NDADDR];
ib[i+NDADDR] = (daddr_t)0;
}
wtfs(ip->i_ib[0], (char *)ib);
}
break;
case IFBLK:
case IFCHR:
break;
default:
printf("bad mode %o\n", ip->i_mode);
exit(1);
}
d = itod(ip->i_number);
off = itoo(ip->i_number);
rdfs(d, (char *)buf);
buf[off].di_ic2 = ip->i_ic2;
bcopy(ip->i_addr,buf[off].di_addr,NADDR*sizeof(daddr_t));
buf[off].di_ic1 = ip->i_ic1;
wtfs(d, (char *)buf);
}
daddr_t
alloc()
{
daddr_t bno;
register i;
union {
char data[DEV_BSIZE];
struct fblk frees;
} fbuf;
if (!sblock.fs_nfree || (bno=sblock.fs_free[--sblock.fs_nfree]) == 0) {
fprintf(stderr, "Out of space.\n");
exit(1);
}
sblock.fs_tfree--;
if(sblock.fs_nfree == 0) {
rdfs(bno, fbuf.data);
sblock.fs_nfree = fbuf.frees.df_nfree;
for(i=0;i<NICFREE;i++)
sblock.fs_free[i] = fbuf.frees.df_free[i];
}
return(bno);
}
/*
* Allocate an inode on the disk
*
* This assumes a newly created filesystem in which fs_inode
* is zero filled and fs_ninode is zero.
*/
ino_t
ialloc(ip)
register struct inode *ip;
{
ip->i_number = ++ino;
return(ip->i_number);
}
/*
* read a block from the file system
*/
rdfs(bno, bf)
daddr_t bno;
register char *bf;
{
register int n;
if (lseek(fsi, bno * DEV_BSIZE, 0) < 0) {
printf("seek error: %ld\n", bno);
perror("rdfs");
exit(1);
}
n = read(fsi, bf, DEV_BSIZE);
if(n != DEV_BSIZE) {
printf("read error: %ld\n", bno);
perror("rdfs");
exit(1);
}
}
/*
* write a block to the file system
*/
wtfs(bno, bf)
daddr_t bno;
register char *bf;
{
register int n;
if (lseek(fso, bno * DEV_BSIZE, 0) < 0) {
printf("seek error: %ld\n", bno);
perror("wtfs");
exit(1);
}
n = write(fso, bf, DEV_BSIZE);
if(n != DEV_BSIZE) {
printf("write error: %D\n", bno);
perror("wtfs");
exit(1);
}
}