BSD 4_3_Reno release

[unix-history] / usr / src / sbin / clri / clri.c

diff --git a/usr/src/sbin/clri/clri.c b/usr/src/sbin/clri/clri.c
index 2adadf2..686fd2b 100644 (file)
--- a/usr/src/sbin/clri/clri.c
+++ b/usr/src/sbin/clri/clri.c
@@ -1,102 +1,133 @@
-static char sccsid[] = "@(#)clri.c 2.4 %G%";
+/*
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Rich $alz of BBN Inc.
+ *
+ * Redistribution and use in source and binary forms are permitted provided
+ * that: (1) source distributions retain this entire copyright notice and
+ * comment, and (2) distributions including binaries display the following
+ * acknowledgement:  ``This product includes software developed by the
+ * University of California, Berkeley and its contributors'' in the
+ * documentation or other materials provided with the distribution and in
+ * all advertising materials mentioning features or use of this software.
+ * Neither the name of the University nor the names of its contributors may
+ * be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#ifndef lint
+char copyright[] =
+"@(#) Copyright (c) 1990 The Regents of the University of California.\n\
+ All rights reserved.\n";
+#endif /* not lint */

 
 

-/* static char *sccsid = "@(#)clri.c   4.1 (Berkeley) 10/1/80"; */
+#ifndef lint
+static char sccsid[] = "@(#)clri.c     5.2 (Berkeley) 6/11/90";
+#endif /* not lint */

 
 /*
 
 /*

- * clri filsys inumber ...
+ * clri(8)

  */
 
 #include <sys/param.h>
  */
 
 #include <sys/param.h>

-#include <sys/inode.h>
-#include <sys/fs.h>
-
-#define ISIZE  (sizeof(struct dinode))
-#define        NI      (MAXBSIZE/ISIZE)
-struct ino {
-       char    junk[ISIZE];
-};
-struct ino     buf[NI];
-
-union {
-       char            dummy[SBSIZE];
-       struct fs       sblk;
-} sb_un;
-#define sblock sb_un.sblk
+#include <sys/time.h>
+#include <sys/vnode.h>
+#include <ufs/quota.h>
+#include <ufs/inode.h>
+#include <ufs/fs.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <errno.h>

 
 

-int    status;
-long   dev_bsize = 1;
+char *fs;

 
 main(argc, argv)
        int argc;
 
 main(argc, argv)
        int argc;

-       char *argv[];
+       char **argv;

 {
 {

-       register i, f;
-       unsigned n;
-       int j, k;
-       long off;
+       register struct fs *sbp;
+       register struct dinode *ip;
+       register int fd;
+       struct dinode ibuf[MAXBSIZE / sizeof (struct dinode)];
+       long generation, offset, bsize;
+       int inonum;
+       char sblock[SBSIZE];

 
        if (argc < 3) {
 
        if (argc < 3) {

-               printf("usage: clri filsys inumber ...\n");
-               exit(4);
+               (void)fprintf(stderr, "usage: clri filesystem inode ...\n");
+               exit(1);

        }
        }

-       f = open(argv[1], 2);
-       if (f < 0) {
-               printf("cannot open %s\n", argv[1]);
-               exit(4);
-       }
-       lseek(f, SBOFF, 0);
-       if (read(f, &sblock, SBSIZE) != SBSIZE) {
-               printf("cannot read %s\n", argv[1]);
-               exit(4);
+
+       fs = *++argv;
+
+       /* get the superblock. */
+       if ((fd = open(fs, O_RDWR, 0)) < 0)
+               error();
+       if (lseek(fd, SBLOCK * DEV_BSIZE, SEEK_SET) < 0)
+               error();
+       if (read(fd, sblock, sizeof(sblock)) != sizeof(sblock)) {
+               (void)fprintf(stderr,
+                   "clri: %s: can't read the superblock.\n", fs);
+               exit(1);

        }
        }

-       if (sblock.fs_magic != FS_MAGIC) {
-               printf("bad super block magic number\n");
-               exit(4);
+
+       sbp = (struct fs *)sblock;
+       if (sbp->fs_magic != FS_MAGIC) {
+               (void)fprintf(stderr,
+                   "clri: %s: superblock magic number 0x%x, not 0x%x.\n",
+                   fs, sbp->fs_magic, FS_MAGIC);
+               exit(1);

        }
        }

-       dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1);
-       for (i = 2; i < argc; i++) {
-               if (!isnumber(argv[i])) {
-                       printf("%s: is not a number\n", argv[i]);
-                       status = 1;
-                       continue;
-               }
-               n = atoi(argv[i]);
-               if (n == 0) {
-                       printf("%s: is zero\n", argv[i]);
-                       status = 1;
-                       continue;
-               }
-               off = fsbtodb(&sblock, itod(&sblock, n)) * dev_bsize;
-               lseek(f, off, 0);
-               if (read(f, (char *)buf, sblock.fs_bsize) != sblock.fs_bsize) {
-                       printf("%s: read error\n", argv[i]);
-                       status = 1;
+       bsize = sbp->fs_bsize;
+
+       /* remaining arguments are inode numbers. */
+       while (*++argv) {
+               /* get the inode number. */
+               if ((inonum = atoi(*argv)) <= 0) {
+                       (void)fprintf(stderr,
+                           "clri: %s is not a valid inode number.\n", *argv);
+                       exit(1);

                }
                }

+               (void)printf("clearing %d\n", inonum);
+
+               /* read in the appropriate block. */
+               offset = itod(sbp, inonum);     /* inode to fs block */
+               offset = fsbtodb(sbp, offset);  /* fs block to disk block */
+               offset *= DEV_BSIZE;            /* disk block to disk bytes */
+
+               /* seek and read the block */
+               if (lseek(fd, offset, SEEK_SET) < 0)
+                       error();
+               if (read(fd, (char *)ibuf, bsize) != bsize)
+                       error();
+
+               /* get the inode within the block. */
+               ip = &ibuf[itoo(sbp, inonum)];
+
+               /* clear the inode, and bump the generation count. */
+               generation = ip->di_gen + 1;
+               bzero((char *)ip, sizeof *ip);
+               ip->di_gen = generation;
+
+               /* backup and write the block */
+               if (lseek(fd, -bsize, SEEK_CUR) < 0)
+                       error();
+               if (write(fd, (char *)ibuf, bsize) != bsize)
+                       error();
+               (void)fsync(fd);

        }
        }

-       if (status)
-               exit(status);
-       for (i = 2; i < argc; i++) {
-               n = atoi(argv[i]);
-               printf("clearing %u\n", n);
-               off = fsbtodb(&sblock, itod(&sblock, n)) * dev_bsize;
-               lseek(f, off, 0);
-               read(f, (char *)buf, sblock.fs_bsize);
-               j = itoo(&sblock, n);
-               for (k = 0; k < ISIZE; k++)
-                       buf[j].junk[k] = 0;
-               lseek(f, off, 0);
-               write(f, (char *)buf, sblock.fs_bsize);
-       }
-       exit(status);
+       (void)close(fd);
+       exit(0);

 }
 
 }
 

-isnumber(s)
-       char *s;
+error()

 {
 {

-       register c;
-
-       while(c = *s++)
-               if (c < '0' || c > '9')
-                       return(0);
-       return(1);
+       (void)fprintf(stderr, "clri: %s: %s\n", fs, strerror(errno));
+       exit(1);

 }
 }