386BSD 0.1 development

Work on file usr/src/sbin/clri/clri.c

Co-Authored-By: Lynne Greer Jolitz <ljolitz@cardio.ucsf.edu>
Synthesized-from: 386BSD-0.1

diff --git a/usr/src/sbin/clri/clri.c b/usr/src/sbin/clri/clri.c
new file mode 100644 (file)
index 0000000..6caed37
--- /dev/null
+++ b/usr/src/sbin/clri/clri.c
@@ -0,0 +1,145 @@
+/*
+ * 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, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *     This product includes software developed by the University of
+ *     California, Berkeley and its contributors.
+ * 4. 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 BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+char copyright[] =
+"@(#) Copyright (c) 1990 The Regents of the University of California.\n\
+ All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)clri.c     5.3 (Berkeley) 6/29/91";
+#endif /* not lint */
+
+/*
+ * clri(8)
+ */
+
+#include <sys/param.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>
+
+char *fs;
+
+main(argc, argv)
+       int argc;
+       char **argv;
+{
+       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) {
+               (void)fprintf(stderr, "usage: clri filesystem inode ...\n");
+               exit(1);
+       }
+
+       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);
+       }
+
+       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);
+       }
+       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);
+       }
+       (void)close(fd);
+       exit(0);
+}
+
+error()
+{
+       (void)fprintf(stderr, "clri: %s: %s\n", fs, strerror(errno));
+       exit(1);
+}