-A archive file implementation

[dump.git] / dump / traverse.c

diff --git a/dump/traverse.c b/dump/traverse.c
index a8ca3a4f08cba32c08b0b418be65712bc516d410..80d7e86bf17e18441bb28cf38ac708f59d5d516b 100644 (file)
--- a/dump/traverse.c
+++ b/dump/traverse.c
@@ -2,8 +2,8 @@
  *     Ported to Linux's Second Extended File System as part of the
  *     dump and restore backup suit
  *     Remy Card <card@Linux.EU.Org>, 1994-1997
- *     Stelian Pop <pop@noos.fr>, 1999-2000
- *     Stelian Pop <pop@noos.fr> - Alcôve <www.alcove.fr>, 2000
+ *     Stelian Pop <stelian@popies.net>, 1999-2000
+ *     Stelian Pop <stelian@popies.net> - Alcôve <www.alcove.com>, 2000-2002
  */
 
 /*-
@@ -41,7 +41,7 @@
 
 #ifndef lint
 static const char rcsid[] =
-       "$Id: traverse.c,v 1.37 2001/07/19 09:49:35 stelian Exp $";
+       "$Id: traverse.c,v 1.41 2002/01/25 14:59:53 stelian Exp $";
 #endif /* not lint */
 
 #include <config.h>
@@ -898,8 +898,8 @@ dumpino(struct dinode *dp, dump_ino_t ino)
 
        ext2fs_block_iterate2(fs, (ext2_ino_t)ino, 0, NULL, dumponeblock, (void *)&bc);
        /* deal with holes at the end of the inode */
-       if (i_size > bc.next_block*sblock->fs_fsize) {
-               remaining = i_size - bc.next_block*sblock->fs_fsize;
+       if (i_size > ((u_quad_t)bc.next_block) * sblock->fs_fsize) {
+               remaining = i_size - ((u_quad_t)bc.next_block) * sblock->fs_fsize;
                for (i = 0; i < howmany(remaining, sblock->fs_fsize); i++) {
                        bc.buf[bc.cnt++] = 0;
                        if (bc.cnt == bc.max) {
@@ -1176,21 +1176,20 @@ dumpmap(char *map, int type, dump_ino_t ino)
                writerec(cp, 0);
 }
 
-/*
- * Write a header record to the dump tape.
- */
 #if defined __linux__ && !defined(int32_t)
 #define int32_t __s32
 #endif
+
+/* 
+ * Compute and fill in checksum information.
+ */
 void
-writeheader(dump_ino_t ino)
+mkchecksum(union u_spcl *tmpspcl) 
 {
-       register int32_t sum, cnt, *lp;
+       int32_t sum, cnt, *lp;
 
-       spcl.c_inumber = ino;
-       spcl.c_magic = NFS_MAGIC;
-       spcl.c_checksum = 0;
-       lp = (int32_t *)&spcl;
+       tmpspcl->s_spcl.c_checksum = 0;
+       lp = (int32_t *)&tmpspcl->s_spcl;
        sum = 0;
        cnt = sizeof(union u_spcl) / (4 * sizeof(int32_t));
        while (--cnt >= 0) {
@@ -1199,7 +1198,18 @@ writeheader(dump_ino_t ino)
                sum += *lp++;
                sum += *lp++;
        }
-       spcl.c_checksum = CHECKSUM - sum;
+       tmpspcl->s_spcl.c_checksum = CHECKSUM - sum;
+}
+
+/*
+ * Write a header record to the dump tape.
+ */
+void
+writeheader(dump_ino_t ino)
+{
+       spcl.c_inumber = ino;
+       spcl.c_magic = NFS_MAGIC;
+       mkchecksum((union u_spcl *)&spcl);
        writerec((char *)&spcl, 1);
 }
 
@@ -1239,11 +1249,10 @@ getino(dump_ino_t inum)
 /*
  * Read a chunk of data from the disk.
  * Try to recover from hard errors by reading in sector sized pieces.
- * Error recovery is attempted at most BREADEMAX times before seeking
+ * Error recovery is attempted at most breademax times before seeking
  * consent from the operator to continue.
  */
 int    breaderrors = 0;
-#define        BREADEMAX 32
 
 void
 bread(daddr_t blkno, char *buf, int size)
@@ -1282,9 +1291,9 @@ loop:
        else
                msg("short read error from %s: [block %d]: count=%d, got=%d\n",
                        disk, blkno, size, cnt);
-       if (++breaderrors > BREADEMAX) {
+       if (++breaderrors > breademax) {
                msg("More than %d block read errors from %d\n",
-                       BREADEMAX, disk);
+                       breademax, disk);
                broadcast("DUMP IS AILING!\n");
                msg("This is an unrecoverable error.\n");
                if (!query("Do you want to attempt to continue?")){