4.4BSD snapshot (revision 8.1); add 1993 to copyright

[unix-history] / usr / src / sys / stand.att / sys.c

diff --git a/usr/src/sys/stand.att/sys.c b/usr/src/sys/stand.att/sys.c
index 6ac73c4..5f998fc 100644 (file)
--- a/usr/src/sys/stand.att/sys.c
+++ b/usr/src/sys/stand.att/sys.c
@@ -1,611 +1,48 @@
-/*     sys.c   6.2     83/09/23        */
-
-#include "../h/param.h"
-#include "../h/inode.h"
-#include "../h/fs.h"
-#include "../h/dir.h"
-#include "saio.h"
-
-ino_t  dlook();
-
-struct dirstuff {
-       int loc;
-       struct iob *io;
-};
-
-static
-openi(n, io)
-       register struct iob *io;
-{
-       register struct dinode *dp;
-       int cc;
-
-       io->i_offset = 0;
-       io->i_bn = fsbtodb(&io->i_fs, itod(&io->i_fs, n)) + io->i_boff;
-       io->i_cc = io->i_fs.fs_bsize;
-       io->i_ma = io->i_buf;
-       cc = devread(io);
-       dp = (struct dinode *)io->i_buf;
-       io->i_ino.i_ic = dp[itoo(&io->i_fs, n)].di_ic;
-       return (cc);
-}
-
-static
-find(path, file)
-       register char *path;
-       struct iob *file;
-{
-       register char *q;
-       char c;
-       int n;
-
-       if (path==NULL || *path=='\0') {
-               printf("null path\n");
-               return (0);
-       }
-
-       if (openi((ino_t) ROOTINO, file) < 0) {
-               printf("can't read root inode\n");
-               return (0);
-       }
-       while (*path) {
-               while (*path == '/')
-                       path++;
-               q = path;
-               while(*q != '/' && *q != '\0')
-                       q++;
-               c = *q;
-               *q = '\0';
-
-               if ((n = dlook(path, file)) != 0) {
-                       if (c == '\0')
-                               break;
-                       if (openi(n, file) < 0)
-                               return (0);
-                       *q = c;
-                       path = q;
-                       continue;
-               } else {
-                       printf("%s not found\n", path);
-                       return (0);
-               }
-       }
-       return (n);
-}
-
-static daddr_t
-sbmap(io, bn)
-       register struct iob *io;
-       daddr_t bn;
-{
-       register struct inode *ip;
-       int i, j, sh;
-       daddr_t nb, *bap;
-
-       ip = &io->i_ino;
-       if (bn < 0) {
-               printf("bn negative\n");
-               return ((daddr_t)0);
-       }
-
-       /*
-        * blocks 0..NDADDR are direct blocks
-        */
-       if(bn < NDADDR) {
-               nb = ip->i_db[bn];
-               return (nb);
-       }
-
-       /*
-        * addresses NIADDR have single and double indirect blocks.
-        * the first step is to determine how many levels of indirection.
-        */
-       sh = 1;
-       bn -= NDADDR;
-       for (j = NIADDR; j > 0; j--) {
-               sh *= NINDIR(&io->i_fs);
-               if (bn < sh)
-                       break;
-               bn -= sh;
-       }
-       if (j == 0) {
-               printf("bn ovf %D\n", bn);
-               return ((daddr_t)0);
-       }
-
-       /*
-        * fetch the first indirect block address from the inode
-        */
-       nb = ip->i_ib[NIADDR - j];
-       if (nb == 0) {
-               printf("bn void %D\n",bn);
-               return ((daddr_t)0);
-       }
-
-       /*
-        * fetch through the indirect blocks
-        */
-       for (; j <= NIADDR; j++) {
-               if (blknos[j] != nb) {
-                       io->i_bn = fsbtodb(&io->i_fs, nb) + io->i_boff;
-                       io->i_ma = b[j];
-                       io->i_cc = io->i_fs.fs_bsize;
-                       if (devread(io) != io->i_fs.fs_bsize) {
-                               if (io->i_error)
-                                       errno = io->i_error;
-                               printf("bn %D: read error\n", io->i_bn);
-                               return ((daddr_t)0);
-                       }
-                       blknos[j] = nb;
-               }
-               bap = (daddr_t *)b[j];
-               sh /= NINDIR(&io->i_fs);
-               i = (bn / sh) % NINDIR(&io->i_fs);
-               nb = bap[i];
-               if(nb == 0) {
-                       printf("bn void %D\n",bn);
-                       return ((daddr_t)0);
-               }
-       }
-       return (nb);
-}
-
-static ino_t
-dlook(s, io)
-       char *s;
-       register struct iob *io;
-{
-       register struct direct *dp;
-       register struct inode *ip;
-       struct dirstuff dirp;
-       int len;
-
-       if (s == NULL || *s == '\0')
-               return (0);
-       ip = &io->i_ino;
-       if ((ip->i_mode&IFMT) != IFDIR) {
-               printf("not a directory\n");
-               return (0);
-       }
-       if (ip->i_size == 0) {
-               printf("zero length directory\n");
-               return (0);
-       }
-       len = strlen(s);
-       dirp.loc = 0;
-       dirp.io = io;
-       for (dp = readdir(&dirp); dp != NULL; dp = readdir(&dirp)) {
-               if(dp->d_ino == 0)
-                       continue;
-               if (dp->d_namlen == len && !strcmp(s, dp->d_name))
-                       return (dp->d_ino);
-       }
-       return (0);
-}
-
-/*
- * get next entry in a directory.
+/*-
+ * Copyright (c) 1982, 1988, 1993
+ *     The Regents of the University of California.  All rights reserved.
+ *
+ * %sccs.include.proprietary.c%
+ *
+ *     @(#)sys.c       8.1 (Berkeley) %G%

  */
  */

-struct direct *
-readdir(dirp)
-       register struct dirstuff *dirp;
-{
-       register struct direct *dp;
-       register struct iob *io;
-       daddr_t lbn, d;
-       int off;

 
 

-       io = dirp->io;
-       for(;;) {
-               if (dirp->loc >= io->i_ino.i_size)
-                       return (NULL);
-               off = blkoff(&io->i_fs, dirp->loc);
-               if (off == 0) {
-                       lbn = lblkno(&io->i_fs, dirp->loc);
-                       d = sbmap(io, lbn);
-                       if(d == 0)
-                               return NULL;
-                       io->i_bn = fsbtodb(&io->i_fs, d) + io->i_boff;
-                       io->i_ma = io->i_buf;
-                       io->i_cc = blksize(&io->i_fs, &io->i_ino, lbn);
-                       if (devread(io) < 0) {
-                               errno = io->i_error;
-                               printf("bn %D: read error\n", io->i_bn);
-                               return (NULL);
-                       }
-               }
-               dp = (struct direct *)(io->i_buf + off);
-               dirp->loc += dp->d_reclen;
-               if (dp->d_ino == 0)
-                       continue;
-               return (dp);
-       }
-}
+#include <sys/param.h>
+#include <sys/reboot.h>

 
 

-lseek(fdesc, addr, ptr)
-       int fdesc, ptr;
-       off_t addr;
-{
-       register struct iob *io;
+#include <ufs/ufs/dir.h>
+#include <stand.att/saio.h>

 
 

-       if (ptr != 0) {
-               printf("Seek not from beginning of file\n");
-               errno = EOFFSET;
-               return (-1);
-       }
-       fdesc -= 3;
-       if (fdesc < 0 || fdesc >= NFILES ||
-           ((io = &iob[fdesc])->i_flgs & F_ALLOC) == 0) {
-               errno = EBADF;
-               return (-1);
-       }
-       io->i_offset = addr;
-       io->i_bn = addr / DEV_BSIZE;
-       io->i_cc = 0;
-       return (0);
-}
-
-getc(fdesc)
-       int fdesc;
-{
-       register struct iob *io;
-       register struct fs *fs;
-       register char *p;
-       int c, lbn, off, size, diff;
-
-
-       if (fdesc >= 0 && fdesc <= 2)
-               return (getchar());
-       fdesc -= 3;
-       if (fdesc < 0 || fdesc >= NFILES ||
-           ((io = &iob[fdesc])->i_flgs&F_ALLOC) == 0) {
-               errno = EBADF;
-               return (-1);
-       }
-       p = io->i_ma;
-       if (io->i_cc <= 0) {
-               if ((io->i_flgs & F_FILE) != 0) {
-                       diff = io->i_ino.i_size - io->i_offset;
-                       if (diff <= 0)
-                               return (-1);
-                       fs = &io->i_fs;
-                       lbn = lblkno(fs, io->i_offset);
-                       io->i_bn = fsbtodb(fs, sbmap(io, lbn)) + io->i_boff;
-                       off = blkoff(fs, io->i_offset);
-                       size = blksize(fs, &io->i_ino, lbn);
-               } else {
-                       io->i_bn = io->i_offset / DEV_BSIZE;
-                       off = 0;
-                       size = DEV_BSIZE;
-               }
-               io->i_ma = io->i_buf;
-               io->i_cc = size;
-               if (devread(io) < 0) {
-                       errno = io->i_error;
-                       return (-1);
-               }
-               if ((io->i_flgs & F_FILE) != 0) {
-                       if (io->i_offset - off + size >= io->i_ino.i_size)
-                               io->i_cc = diff + off;
-                       io->i_cc -= off;
-               }
-               p = &io->i_buf[off];
-       }
-       io->i_cc--;
-       io->i_offset++;
-       c = (unsigned)*p++;
-       io->i_ma = p;
-       return (c);
-}
-
-/* does this port?
-getw(fdesc)
-       int fdesc;
-{
-       register w,i;
-       register char *cp;
-       int val;
-
-       for (i = 0, val = 0, cp = &val; i < sizeof(val); i++) {
-               w = getc(fdesc);
-               if (w < 0) {
-                       if (i == 0)
-                               return (-1);
-                       else
-                               return (val);
-               }
-               *cp++ = w;
-       }
-       return (val);
-}
-*/
-int    errno;
-
-read(fdesc, buf, count)
-       int fdesc, count;
-       char *buf;
-{
-       register i;
-       register struct iob *file;
-
-       errno = 0;
-       if (fdesc >= 0 & fdesc <= 2) {
-               i = count;
-               do {
-                       *buf = getchar();
-               } while (--i && *buf++ != '\n');
-               return (count - i);
-       }
-       fdesc -= 3;
-       if (fdesc < 0 || fdesc >= NFILES ||
-           ((file = &iob[fdesc])->i_flgs&F_ALLOC) == 0) {
-               errno = EBADF;
-               return (-1);
-       }
-       if ((file->i_flgs&F_READ) == 0) {
-               errno = EBADF;
-               return (-1);
-       }
-       if ((file->i_flgs & F_FILE) == 0) {
-               file->i_cc = count;
-               file->i_ma = buf;
-               file->i_bn = file->i_boff + (file->i_offset / DEV_BSIZE);
-               i = devread(file);
-               file->i_offset += count;
-               if (i < 0)
-                       errno = file->i_error;
-               return (i);
-       } else {
-               if (file->i_offset+count > file->i_ino.i_size)
-                       count = file->i_ino.i_size - file->i_offset;
-               if ((i = count) <= 0)
-                       return (0);
-               do {
-                       *buf++ = getc(fdesc+3);
-               } while (--i);
-               return (count);
-       }
-}
-
-write(fdesc, buf, count)
-       int fdesc, count;
-       char *buf;
-{
-       register i;
-       register struct iob *file;
-
-       errno = 0;
-       if (fdesc >= 0 && fdesc <= 2) {
-               i = count;
-               while (i--)
-                       putchar(*buf++);
-               return (count);
-       }
-       fdesc -= 3;
-       if (fdesc < 0 || fdesc >= NFILES ||
-           ((file = &iob[fdesc])->i_flgs&F_ALLOC) == 0) {
-               errno = EBADF;
-               return (-1);
-       }
-       if ((file->i_flgs&F_WRITE) == 0) {
-               errno = EBADF;
-               return (-1);
-       }
-       file->i_cc = count;
-       file->i_ma = buf;
-       file->i_bn = file->i_boff + (file->i_offset / DEV_BSIZE);
-       i = devwrite(file);
-       file->i_offset += count;
-       if (i < 0)
-               errno = file->i_error;
-       return (i);
-}
-
-int    openfirst = 1;
-
-open(str, how)
-       char *str;
-       int how;
-{
-       register char *cp;
-       int i;
-       register struct iob *file;
-       register struct devsw *dp;
-       int fdesc;
-       long atol();
-
-       if (openfirst) {
-               for (i = 0; i < NFILES; i++)
-                       iob[i].i_flgs = 0;
-               openfirst = 0;
-       }
-
-       for (fdesc = 0; fdesc < NFILES; fdesc++)
-               if (iob[fdesc].i_flgs == 0)
-                       goto gotfile;
-       _stop("No more file slots");
-gotfile:
-       (file = &iob[fdesc])->i_flgs |= F_ALLOC;
-
-       for (cp = str; *cp && *cp != '('; cp++)
-                       ;
-       if (*cp != '(') {
-               printf("Bad device\n");
-               file->i_flgs = 0;
-               errno = EDEV;
-               return (-1);
-       }
-       *cp++ = '\0';
-       for (dp = devsw; dp->dv_name; dp++) {
-               if (!strcmp(str, dp->dv_name))
-                       goto gotdev;
-       }
-       printf("Unknown device\n");
-       file->i_flgs = 0;
-       errno = ENXIO;
-       return (-1);
-gotdev:
-       *(cp-1) = '(';
-       file->i_ino.i_dev = dp-devsw;
-       file->i_unit = *cp++ - '0';
-       if (*cp >= '0' && *cp <= '9')
-               file->i_unit = file->i_unit * 10 + *cp++ - '0';
-       if (file->i_unit < 0 || file->i_unit > 31) {
-               printf("Bad unit specifier\n");
-               file->i_flgs = 0;
-               errno = EUNIT;
-               return (-1);
-       }
-       if (*cp++ != ',') {
-badoff:
-               printf("Missing offset specification\n");
-               file->i_flgs = 0;
-               errno = EOFFSET;
-               return (-1);
-       }
-       file->i_boff = atol(cp);
-       for (;;) {
-               if (*cp == ')')
-                       break;
-               if (*cp++)
-                       continue;
-               goto badoff;
-       }
-       devopen(file);
-       if (*++cp == '\0') {
-               file->i_flgs |= how+1;
-               file->i_cc = 0;
-               file->i_offset = 0;
-               return (fdesc+3);
-       }
-       file->i_ma = (char *)(&file->i_fs);
-       file->i_cc = SBSIZE;
-       file->i_bn = SBLOCK + file->i_boff;
-       file->i_offset = 0;
-       if (devread(file) < 0) {
-               errno = file->i_error;
-               printf("super block read error\n");
-               return (-1);
-       }
-       if ((i = find(cp, file)) == 0) {
-               file->i_flgs = 0;
-               errno = ESRCH;
-               return (-1);
-       }
-       if (how != 0) {
-               printf("Can't write files yet.. Sorry\n");
-               file->i_flgs = 0;
-               errno = EIO;
-               return (-1);
-       }
-       if (openi(i, file) < 0) {
-               errno = file->i_error;
-               return (-1);
-       }
-       file->i_offset = 0;
-       file->i_cc = 0;
-       file->i_flgs |= F_FILE | (how+1);
-       return (fdesc+3);
-}
-
-close(fdesc)
-       int fdesc;
-{
-       struct iob *file;
-
-       fdesc -= 3;
-       if (fdesc < 0 || fdesc >= NFILES ||
-           ((file = &iob[fdesc])->i_flgs&F_ALLOC) == 0) {
-               errno = EBADF;
-               return (-1);
-       }
-       if ((file->i_flgs&F_FILE) == 0)
-               devclose(file);
-       file->i_flgs = 0;
-       return (0);
-}
-
-ioctl(fdesc, cmd, arg)
-       int fdesc, cmd;
-       char *arg;
-{
-       register struct iob *file;
-       int error = 0;
-
-       fdesc -= 3;
-       if (fdesc < 0 || fdesc >= NFILES ||
-           ((file = &iob[fdesc])->i_flgs&F_ALLOC) == 0) {
-               errno = EBADF;
-               return (-1);
-       }
-       switch (cmd) {
-
-       case SAIOHDR:
-               file->i_flgs |= F_HDR;
-               break;
-
-       case SAIOCHECK:
-               file->i_flgs |= F_CHECK;
-               break;
-
-       case SAIOHCHECK:
-               file->i_flgs |= F_HCHECK;
-               break;
-
-       case SAIONOBAD:
-               file->i_flgs |= F_NBSF;
-               break;
-
-       case SAIODOBAD:
-               file->i_flgs &= ~F_NBSF;
-               break;
-
-       case SAIOECCLIM:
-               file->i_flgs |= F_ECCLM;
-               break;
-
-       case SAIOECCUNL:
-               file->i_flgs &= ~F_ECCLM;
-               break;
-
-       case SAIOSEVRE:
-               file->i_flgs |= F_SEVRE;
-               break;
-
-       case SAIONSEVRE:
-               file->i_flgs &= ~F_SEVRE;
-               break;
-
-       default:
-               error = devioctl(file, cmd, arg);
-               break;
-       }
-       if (error < 0)
-               errno = file->i_error;
-       return (error);
-}
+struct iob iob[SOPEN_MAX];
+int errno;

 
 

+#ifndef i386

 exit()
 {
        _stop("Exit called");
 }
 exit()
 {
        _stop("Exit called");
 }

+#endif

 
 _stop(s)
        char *s;
 {
 
 _stop(s)
        char *s;
 {

+       static int stopped;

        int i;
 
        int i;
 

-       for (i = 0; i < NFILES; i++)
-               if (iob[i].i_flgs != 0)
-                       close(i);
+       if (!stopped) {
+               stopped = 1;
+               for (i = 0; i < SOPEN_MAX; i++)
+                       if (iob[i].i_flgs != 0)
+                               (void)close(i);
+       }

        printf("%s\n", s);
        _rtt();
 }
 
        printf("%s\n", s);
        _rtt();
 }
 

-trap(ps)
-       int ps;
+/*
+ * For gcc
+ */
+__main()

 {
 {

-       printf("Trap %o\n", ps);
-       for (;;)
-               ;
+       return;

 }
 }