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[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 ffc230e..7d93341 100644 (file)
--- a/usr/src/sys/stand.att/sys.c
+++ b/usr/src/sys/stand.att/sys.c
@@ -1,49 +1,70 @@
-/*     sys.c   4.2     %G%     */
-
-#include <sys/param.h>
-#include <sys/ino.h>
-#include <sys/inode.h>
-#include <sys/filsys.h>
-#include <sys/dir.h>
+/*
+ * Copyright (c) 1982, 1986 Regents of the University of California.
+ * All rights reserved.  The Berkeley software License Agreement
+ * specifies the terms and conditions for redistribution.
+ *
+ *     @(#)sys.c       7.8 (Berkeley) %G%
+ */
+
+#include "sys/param.h"
+#include "sys/time.h"
+#include "sys/vnode.h"
+#include "ufs/inode.h"
+#include "ufs/fs.h"
+#include "ufs/dir.h"
+#include "sys/reboot.h"
 #include "saio.h"
 
 #include "saio.h"
 
+#define        isdigit(c)      ((u_int)((c) - '0') <= 9)
+#define        isspace(c)      ((c) == ' ' || (c) == '\t')
+#define        isupper(c)      ((u_int)((c) - 'A') <= 'Z' - 'A')
+#define        tolower(c)      ((c) - 'A' + 'a')
+
 ino_t  dlook();
 
 ino_t  dlook();
 
+struct dirstuff {
+       int loc;
+       struct iob *io;
+};
+
+struct iob iob[NFILES];
+
 static
 static
-openi(n,io)
-register struct iob *io;
+openi(n, io)
+       register struct iob *io;
 {
        register struct dinode *dp;
 {
        register struct dinode *dp;
+       int cc;
 
        io->i_offset = 0;
 
        io->i_offset = 0;
-       io->i_bn = fsbtodb(itod(n)) + io->i_boff;
-       io->i_cc = BSIZE;
+       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;
        io->i_ma = io->i_buf;
-       devread(io);
-
+       cc = devread(io);
        dp = (struct dinode *)io->i_buf;
        dp = (struct dinode *)io->i_buf;
-       dp = &dp[itoo(n)];
-       io->i_ino.i_number = n;
-       io->i_ino.i_mode = dp->di_mode;
-       io->i_ino.i_size = dp->di_size;
-       l3tol((char *)io->i_ino.i_un.i_addr, (char *)dp->di_addr, NADDR);
+       io->i_ino.i_ic = dp[itoo(&io->i_fs, n)].di_ic;
+       return (cc);
 }
 
 static
 find(path, file)
 }
 
 static
 find(path, file)
-register char *path;
-struct iob *file;
+       register char *path;
+       struct iob *file;
 {
        register char *q;
 {
        register char *q;
-       char c;
+       char *dir, c;
        int n;
 
        int n;
 
-       if (path==NULL || *path=='\0') {
+       if (path == NULL || *path == '\0') {
                printf("null path\n");
                printf("null path\n");
-               return(0);
+               return (0);
        }
 
        }
 
-       openi((ino_t) ROOTINO, file);
+       if (openi((ino_t) ROOTINO, file) < 0) {
+               printf("can't read root inode\n");
+               return (0);
+       }
+       dir = path;
        while (*path) {
                while (*path == '/')
                        path++;
        while (*path) {
                while (*path == '/')
                        path++;
@@ -52,416 +73,621 @@ struct iob *file;
                        q++;
                c = *q;
                *q = '\0';
                        q++;
                c = *q;
                *q = '\0';
+               if (q == path) path = "." ;     /* "/" means "/." */
 
 
-               if ((n=dlook(path, file))!=0) {
-                       if (c=='\0')
+               if ((n = dlook(path, file, dir)) != 0) {
+                       if (c == '\0')
                                break;
                                break;
-                       openi(n, file);
+                       if (openi(n, file) < 0)
+                               return (0);
                        *q = c;
                        path = q;
                        continue;
                } else {
                        *q = c;
                        path = q;
                        continue;
                } else {
-                       printf("%s not found\n",path);
-                       return(0);
+                       printf("%s: not found\n", path);
+                       return (0);
                }
        }
                }
        }
-       return(n);
+       return (n);
 }
 
 }
 
+#define        NBUFS   4
+static char    b[NBUFS][MAXBSIZE];
+static daddr_t blknos[NBUFS];
+
 static daddr_t
 sbmap(io, bn)
 static daddr_t
 sbmap(io, bn)
-register struct iob *io;
-daddr_t bn;
+       register struct iob *io;
+       daddr_t bn;
 {
 {
-       register i;
        register struct inode *ip;
        register struct inode *ip;
-       int j, sh;
+       int i, j, sh;
        daddr_t nb, *bap;
        daddr_t nb, *bap;
-       int ibn = bn;
 
        ip = &io->i_ino;
 
        ip = &io->i_ino;
-       if(bn < 0) {
+       if (bn < 0) {
                printf("bn negative\n");
                printf("bn negative\n");
-               return((daddr_t)0);
+               return ((daddr_t)0);
        }
 
        /*
        }
 
        /*
-        * blocks 0..NADDR-4 are direct blocks
+        * blocks 0..NDADDR are direct blocks
         */
         */
-       if(bn < NADDR-3) {
-               i = bn;
-               nb = ip->i_un.i_addr[i];
-               return(nb);
+       if(bn < NDADDR) {
+               nb = ip->i_db[bn];
+               return (nb);
        }
 
        /*
        }
 
        /*
-        * addresses NADDR-3, NADDR-2, and NADDR-1
-        * have single, double, triple indirect blocks.
-        * the first step is to determine
-        * how many levels of indirection.
+        * addresses NIADDR have single and double indirect blocks.
+        * the first step is to determine how many levels of indirection.
         */
         */
-       sh = 0;
-       nb = 1;
-       bn -= NADDR-3;
-       for(j=3; j>0; j--) {
-               sh += NSHIFT;
-               nb <<= NSHIFT;
-               if(bn < nb)
+       sh = 1;
+       bn -= NDADDR;
+       for (j = NIADDR; j > 0; j--) {
+               sh *= NINDIR(&io->i_fs);
+               if (bn < sh)
                        break;
                        break;
-               bn -= nb;
+               bn -= sh;
        }
        }
-       if(j == 0) {
-               printf("bn ovf %D\n",bn);
-               return((daddr_t)0);
+       if (j == 0) {
+               printf("bn ovf %D\n", bn);
+               return ((daddr_t)0);
        }
 
        /*
        }
 
        /*
-        * fetch the address from the inode
+        * fetch the first indirect block address from the inode
         */
         */
-       nb = ip->i_un.i_addr[NADDR-j];
-       if(nb == 0) {
+       nb = ip->i_ib[NIADDR - j];
+       if (nb == 0) {
                printf("bn void %D\n",bn);
                printf("bn void %D\n",bn);
-               return((daddr_t)0);
+               return ((daddr_t)0);
        }
 
        /*
         * fetch through the indirect blocks
         */
        }
 
        /*
         * fetch through the indirect blocks
         */
-       for(; j<=3; j++) {
+       for (; j <= NIADDR; j++) {
                if (blknos[j] != nb) {
                if (blknos[j] != nb) {
-                       io->i_bn = fsbtodb(nb) + io->i_boff;
+                       io->i_bn = fsbtodb(&io->i_fs, nb) + io->i_boff;
                        io->i_ma = b[j];
                        io->i_ma = b[j];
-                       io->i_cc = BSIZE;
-                       devread(io);
-                       bap = (daddr_t *)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];
                        blknos[j] = nb;
                }
                bap = (daddr_t *)b[j];
-               sh -= NSHIFT;
-               i = (bn>>sh) & NMASK;
+               sh /= NINDIR(&io->i_fs);
+               i = (bn / sh) % NINDIR(&io->i_fs);
                nb = bap[i];
                if(nb == 0) {
                        printf("bn void %D\n",bn);
                nb = bap[i];
                if(nb == 0) {
                        printf("bn void %D\n",bn);
-                       return((daddr_t)0);
+                       return ((daddr_t)0);
                }
        }
                }
        }
-       return(nb);
+       return (nb);
 }
 
 static ino_t
 }
 
 static ino_t
-dlook(s, io)
-char *s;
-register struct iob *io;
+dlook(s, io, dir)
+       char *s;
+       register struct iob *io;
+       char *dir;
 {
        register struct direct *dp;
        register struct inode *ip;
 {
        register struct direct *dp;
        register struct inode *ip;
-       daddr_t bn;
-       int n,dc;
+       struct dirstuff dirp;
+       int len;
 
 
-       if (s==NULL || *s=='\0')
-               return(0);
+       if (s == NULL || *s == '\0')
+               return (0);
        ip = &io->i_ino;
        ip = &io->i_ino;
-       if ((ip->i_mode&IFMT)!=IFDIR) {
-               printf("not a directory\n");
-               return(0);
+       if ((ip->i_mode&IFMT) != IFDIR) {
+               printf("%s: not a directory\n", dir);
+               return (0);
        }
        }
-
-       n = ip->i_size/sizeof(struct direct);
-
-       if (n==0) {
-               printf("zero length directory\n");
-               return(0);
+       if (ip->i_size == 0) {
+               printf("%s: zero length directory\n", dir);
+               return (0);
        }
        }
-
-       dc = BSIZE;
-       bn = (daddr_t)0;
-       while(n--) {
-               if (++dc >= BSIZE/sizeof(struct direct)) {
-                       io->i_bn = fsbtodb(sbmap(io, bn++)) + io->i_boff;
-                       io->i_ma = io->i_buf;
-                       io->i_cc = BSIZE;
-                       devread(io);
-                       dp = (struct direct *)io->i_buf;
-                       dc = 0;
-               }
-
-               if (match(s, dp->d_name))
-                       return(dp->d_ino);
-               dp++;
+       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);
+       return (0);
 }
 
 }
 
-static
-match(s1,s2)
-register char *s1,*s2;
+/*
+ * get next entry in a directory.
+ */
+struct direct *
+readdir(dirp)
+       register struct dirstuff *dirp;
 {
 {
-       register cc;
+       register struct direct *dp;
+       register struct iob *io;
+       daddr_t lbn, d;
+       int off;
 
 
-       cc = DIRSIZ;
-       while (cc--) {
-               if (*s1 != *s2)
-                       return(0);
-               if (*s1++ && *s2++)
-                       continue; else
-                       return(1);
+       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: directory 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);
        }
        }
-       return(1);
 }
 
 lseek(fdesc, addr, ptr)
 }
 
 lseek(fdesc, addr, ptr)
-int    fdesc;
-off_t  addr;
-int    ptr;
+       int fdesc, ptr;
+       off_t addr;
 {
        register struct iob *io;
 
 {
        register struct iob *io;
 
-       if (ptr != 0) {
+#ifndef SMALL
+       if (ptr != L_SET) {
                printf("Seek not from beginning of file\n");
                printf("Seek not from beginning of file\n");
-               return(-1);
+               errno = EOFFSET;
+               return (-1);
        }
        }
+#endif
        fdesc -= 3;
        fdesc -= 3;
-       if (fdesc < 0 || fdesc >= NFILES || ((io = &iob[fdesc])->i_flgs&F_ALLOC) == 0)
-               return(-1);
+       if (fdesc < 0 || fdesc >= NFILES ||
+           ((io = &iob[fdesc])->i_flgs & F_ALLOC) == 0) {
+               errno = EBADF;
+               return (-1);
+       }
        io->i_offset = addr;
        io->i_offset = addr;
-       io->i_bn = fsbtodb(addr/BSIZE) + io->i_boff;
+       io->i_bn = addr / DEV_BSIZE;
        io->i_cc = 0;
        io->i_cc = 0;
-       return(0);
+       return (0);
 }
 
 getc(fdesc)
 }
 
 getc(fdesc)
-int    fdesc;
+       int fdesc;
 {
        register struct iob *io;
 {
        register struct iob *io;
+       register struct fs *fs;
        register char *p;
        register char *p;
-       register  c;
-       int off;
+       int c, lbn, off, size, diff;
 
 
        if (fdesc >= 0 && fdesc <= 2)
 
 
        if (fdesc >= 0 && fdesc <= 2)
-               return(getchar());
+               return (getchar());
        fdesc -= 3;
        fdesc -= 3;
-       if (fdesc < 0 || fdesc >= NFILES || ((io = &iob[fdesc])->i_flgs&F_ALLOC) == 0)
-               return(-1);
+       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) {
        p = io->i_ma;
        if (io->i_cc <= 0) {
-               io->i_bn = fsbtodb(io->i_offset/(off_t)BSIZE);
-               if (io->i_flgs&F_FILE)
-                       io->i_bn = fsbtodb(sbmap(io, dbtofsb(io->i_bn))) + io->i_boff;
+               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_ma = io->i_buf;
-               io->i_cc = BSIZE;
-               devread(io);
-               if (io->i_flgs&F_FILE) {
-                       off = io->i_offset % (off_t)BSIZE;
-                       if (io->i_offset+(BSIZE-off) >= io->i_ino.i_size)
-                               io->i_cc = io->i_ino.i_size - io->i_offset + off;
+               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;
                        io->i_cc -= off;
-                       if (io->i_cc <= 0)
-                               return(-1);
-               } else
-                       off = 0;
+               }
                p = &io->i_buf[off];
        }
        io->i_cc--;
        io->i_offset++;
        c = (unsigned)*p++;
        io->i_ma = p;
                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);
+       return (c);
 }
 }
-*/
+
+int    errno;
 
 read(fdesc, buf, count)
 
 read(fdesc, buf, count)
-int    fdesc;
-char   *buf;
-int    count;
+       int fdesc, count;
+       char *buf;
 {
 {
-       register i;
+       register i, size;
        register struct iob *file;
        register struct iob *file;
+       register struct fs *fs;
+       int lbn, off;
 
 
+       errno = 0;
        if (fdesc >= 0 & fdesc <= 2) {
                i = count;
                do {
                        *buf = getchar();
                } while (--i && *buf++ != '\n');
        if (fdesc >= 0 & fdesc <= 2) {
                i = count;
                do {
                        *buf = getchar();
                } while (--i && *buf++ != '\n');
-               return(count - i);
+               return (count - i);
        }
        fdesc -= 3;
        }
        fdesc -= 3;
-       if (fdesc < 0 || fdesc >= NFILES || ((file = &iob[fdesc])->i_flgs&F_ALLOC) == 0)
-               return(-1);
-       if ((file->i_flgs&F_READ) == 0)
-               return(-1);
-       if ((file->i_flgs&F_FILE) == 0) {
+       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);
+       }
+#ifndef SMALL
+       if ((file->i_flgs & F_FILE) == 0) {
                file->i_cc = count;
                file->i_ma = buf;
                file->i_cc = count;
                file->i_ma = buf;
+               file->i_bn = file->i_boff + (file->i_offset / DEV_BSIZE);
                i = devread(file);
                i = devread(file);
-               file->i_bn += CLSIZE;
-               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);
+               if (i < 0)
+                       errno = file->i_error;
+               else
+                       file->i_offset += i;
+               return (i);
        }
        }
+#endif
+       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);
+       /*
+        * While reading full blocks, do I/O into user buffer.
+        * Anything else uses getc().
+        */
+       fs = &file->i_fs;
+       while (i) {
+               off = blkoff(fs, file->i_offset);
+               lbn = lblkno(fs, file->i_offset);
+               size = blksize(fs, &file->i_ino, lbn);
+               if (off == 0 && size <= i) {
+                       file->i_bn = fsbtodb(fs, sbmap(file, lbn)) +
+                           file->i_boff;
+                       file->i_cc = size;
+                       file->i_ma = buf;
+                       if (devread(file) < 0) {
+                               errno = file->i_error;
+                               return (-1);
+                       }
+                       file->i_offset += size;
+                       file->i_cc = 0;
+                       buf += size;
+                       i -= size;
+               } else {
+                       size -= off;
+                       if (size > i)
+                               size = i;
+                       i -= size;
+                       do {
+                               *buf++ = getc(fdesc+3);
+                       } while (--size);
+               }
+       }
+       return (count);
 }
 
 }
 
+#ifndef SMALL
 write(fdesc, buf, count)
 write(fdesc, buf, count)
-int    fdesc;
-char   *buf;
-int    count;
+       int fdesc, count;
+       char *buf;
 {
        register i;
        register struct iob *file;
 
 {
        register i;
        register struct iob *file;
 
+       errno = 0;
        if (fdesc >= 0 && fdesc <= 2) {
                i = count;
                while (i--)
                        putchar(*buf++);
        if (fdesc >= 0 && fdesc <= 2) {
                i = count;
                while (i--)
                        putchar(*buf++);
-               return(count);
+               return (count);
        }
        fdesc -= 3;
        }
        fdesc -= 3;
-       if (fdesc < 0 || fdesc >= NFILES || ((file = &iob[fdesc])->i_flgs&F_ALLOC) == 0)
-               return(-1);
-       if ((file->i_flgs&F_WRITE) == 0)
-               return(-1);
+       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_cc = count;
        file->i_ma = buf;
+       file->i_bn = file->i_boff + (file->i_offset / DEV_BSIZE);
        i = devwrite(file);
        i = devwrite(file);
-       file->i_bn += CLSIZE;
-       return(i);
+       file->i_offset += count;
+       if (i < 0)
+               errno = file->i_error;
+       return (i);
 }
 }
+#endif
+
+int    openfirst = 1;
+u_int  opendev;                /* last device opened */
+extern u_int bootdev;
 
 open(str, how)
 
 open(str, how)
-char *str;
-int    how;
+       char *str;
+       int how;
 {
 {
-       register char *cp;
-       int i;
+       register char *t;
+       register int cnt;
        register struct iob *file;
        register struct iob *file;
-       register struct devsw *dp;
-       int     fdesc;
-       static first = 1;
-       long    atol();
-
-       if (first) {
-               for (i = 0; i < NFILES; i++)
-                       iob[i].i_flgs = 0;
-               first = 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;
-               return(-1);
-       }
-       *cp++ = '\0';
-       for (dp = devsw; dp->dv_name; dp++) {
-               if (match(str, dp->dv_name))
-                       goto gotdev;
-       }
-       printf("Unknown device\n");
-       file->i_flgs = 0;
-       return(-1);
-gotdev:
-       *(cp-1) = '(';
-       file->i_ino.i_dev = dp-devsw;
-       file->i_unit = *cp++ - '0';
-       if (file->i_unit < 0 || file->i_unit > 7) {
-               printf("Bad unit specifier\n");
-               file->i_flgs = 0;
-               return(-1);
-       }
-       if (*cp++ != ',') {
-badoff:
-               printf("Missing offset specification\n");
-               file->i_flgs = 0;
-               return(-1);
-       }
-       file->i_boff = atol(cp);
-       for (;;) {
-               if (*cp == ')')
+       int fdesc, args[8], *argp;
+
+       if (openfirst) {
+               for (cnt = 0; cnt < NFILES; cnt++)
+                       iob[cnt].i_flgs = 0;
+               openfirst = 0;
+       }
+
+       for (fdesc = 0;; fdesc++) {
+               if (fdesc == NFILES)
+                       _stop("No more file slots");
+               if (iob[fdesc].i_flgs == 0) {
+                       file = &iob[fdesc];
+                       file->i_flgs |= F_ALLOC;
+                       file->i_adapt = file->i_ctlr = file->i_unit =
+                           file->i_part = 0;
                        break;
                        break;
-               if (*cp++)
-                       continue;
-               goto badoff;
+               }
+       }
+
+       for (cnt = 0; cnt < sizeof(args)/sizeof(args[0]); args[cnt++] = 0);
+#ifndef SMALL
+       for (t = str; *t && *t != '/' && *t != ':' && *t != '('; ++t)
+               if (isupper(*t))
+                       *t = tolower(*t);
+       switch(*t) {
+       case '(':       /* type(adapt, ctlr, drive, partition)file */
+               if ((file->i_ino.i_dev = getdev(str, t - str)) == -1)
+                       goto bad;
+               for (argp = args + 4, cnt = 0; *t != ')'; ++cnt) {
+                       for (++t; isspace(*t); ++t);
+                       if (*t == ')')
+                               break;
+                       if (!isdigit(*t))
+                               goto badspec;
+                       *argp++ = atoi(t);
+                       for (++t; isdigit(*t); ++t);
+                       if (*t != ',' && *t != ')' || cnt == 4)
+                               goto badspec;
+               }
+               for (++t; isspace(*t); ++t);
+               argp -= 4;
+               file->i_adapt = *argp++;
+               file->i_ctlr = *argp++;
+               file->i_unit = *argp++;
+               file->i_part = *argp;
+               break;
+       case ':':       /* [A-Za-z]*[0-9]*[A-Za-z]:file */
+               for (t = str; *t != ':' && !isdigit(*t); ++t);
+               if ((file->i_ino.i_dev = getdev(str, t - str)) == -1)
+                       goto bad;
+               if ((file->i_unit = getunit(t)) == -1)
+                       goto bad;
+               for (; isdigit(*t); ++t);
+               if (*t >= 'a' && *t <= 'h')
+                       file->i_part = *t++ - 'a';
+               if (*t != ':') {
+                       errno = EOFFSET;
+                       goto badspec;
+               }
+               for (++t; isspace(*t); ++t);
+               break;
+       case '/':
+       default:                /* default bootstrap unit and device */
+#else
+       {
+#endif /* SMALL */
+               file->i_ino.i_dev = B_TYPE(bootdev);
+               file->i_adapt = B_ADAPTOR(bootdev);
+               file->i_ctlr = B_CONTROLLER(bootdev);
+               file->i_unit = B_UNIT(bootdev);
+               file->i_part = B_PARTITION(bootdev);
+               t = str;
        }
        }
-       devopen(file);
-       if (*++cp == '\0') {
-               file->i_flgs |= how+1;
+
+       opendev = MAKEBOOTDEV(file->i_ino.i_dev, file->i_adapt, file->i_ctlr,
+           file->i_unit, file->i_part);
+
+       if (errno = devopen(file))
+               goto bad;
+
+       if (*t == '\0') {
+               file->i_flgs |= how + 1;
                file->i_cc = 0;
                file->i_offset = 0;
                file->i_cc = 0;
                file->i_offset = 0;
-               return(fdesc+3);
-       }
-       if ((i = find(cp, file)) == 0) {
-               file->i_flgs = 0;
-               return(-1);
+               return (fdesc+3);
        }
        }
-       if (how != 0) {
+#ifndef SMALL
+       else if (how != 0) {
                printf("Can't write files yet.. Sorry\n");
                printf("Can't write files yet.. Sorry\n");
-               file->i_flgs = 0;
-               return(-1);
+               errno = EIO;
+               goto bad;
+       }
+#endif
+       file->i_ma = (char *)(&file->i_fs);
+       file->i_cc = SBSIZE;
+       file->i_bn = SBOFF / DEV_BSIZE + file->i_boff;
+       file->i_offset = 0;
+       if (devread(file) < 0) {
+               errno = file->i_error;
+               printf("super block read error\n");
+               goto bad;
+       }
+       if ((cnt = find(t, file)) == 0) {
+               errno = ESRCH;
+               goto bad;
+       }
+       if (openi(cnt, file) < 0) {
+               errno = file->i_error;
+               goto bad;
        }
        }
-       openi(i, file);
        file->i_offset = 0;
        file->i_cc = 0;
        file->i_flgs |= F_FILE | (how+1);
        file->i_offset = 0;
        file->i_cc = 0;
        file->i_flgs |= F_FILE | (how+1);
-       return(fdesc+3);
+       return (fdesc+3);
+
+#ifndef SMALL
+badspec:
+       printf("malformed device specification\nusage: device(adaptor, controller, drive, partition)file\n");
+#endif
+bad:
+       file->i_flgs = 0;
+       return (-1);
 }
 
 }
 
+#ifndef SMALL
+static
+getdev(str, len)
+       register char *str;
+       int len;
+{
+       register struct devsw *dp;
+       register int i;
+       char savedch = str[len];
+
+       str[len] = '\0';
+       for (dp = devsw, i = 0; i < ndevs; dp++, i++)
+               if (dp->dv_name && strcmp(str, dp->dv_name) == 0) {
+                       str[len] = savedch;
+                       return (i);
+               }
+       printf("Unknown device\nKnown devices are:\n");
+       for (dp = devsw, i = 0; i < ndevs; dp++, i++)
+               if (dp->dv_name)
+                       printf(" %s", dp->dv_name);
+       printf("\n");
+       errno = ENXIO;
+       return (-1);
+}
+
+static
+getunit(cp)
+       register char *cp;
+{
+       int unit;
+
+       unit = atoi(cp);
+       if ((u_int)unit > 255) {
+               printf("minor device number out of range (0-255)\n");
+               errno = EUNIT;
+               return (-1);
+       }
+       return (unit);
+}
+#endif /* SMALL */
+
 close(fdesc)
 close(fdesc)
-int    fdesc;
+       int fdesc;
 {
        struct iob *file;
 
        fdesc -= 3;
 {
        struct iob *file;
 
        fdesc -= 3;
-       if (fdesc < 0 || fdesc >= NFILES || ((file = &iob[fdesc])->i_flgs&F_ALLOC) == 0)
-               return(-1);
+       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;
        if ((file->i_flgs&F_FILE) == 0)
                devclose(file);
        file->i_flgs = 0;
-       return(0);
+       return (0);
 }
 
 }
 
+#ifndef SMALL
+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;
+
+       default:
+               error = devioctl(file, cmd, arg);
+               break;
+       }
+       if (error < 0)
+               errno = file->i_error;
+       return (error);
+}
+#endif /* SMALL */
+
 exit()
 {
        _stop("Exit called");
 }
 
 _stop(s)
 exit()
 {
        _stop("Exit called");
 }
 
 _stop(s)
-char   *s;
+       char *s;
 {
        int i;
 
 {
        int i;
 
@@ -471,11 +697,3 @@ char       *s;
        printf("%s\n", s);
        _rtt();
 }
        printf("%s\n", s);
        _rtt();
 }
-
-trap(ps)
-int ps;
-{
-       printf("Trap %o\n", ps);
-       for (;;)
-               ;
-}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.