112 lines
1.7 KiB
C
112 lines
1.7 KiB
C
/*
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* dbd - dump a dbm data file
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*/
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#include <stdio.h>
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#include <sys/file.h>
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#include "EXTERN.h"
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#include "sdbm.h"
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char *progname;
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extern void oops();
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#define empty(page) (((short *) page)[0] == 0)
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int
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main(argc, argv)
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char **argv;
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{
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int n;
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char *p;
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char *name;
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int pagf;
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progname = argv[0];
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if (p = argv[1]) {
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name = (char *) malloc((n = strlen(p)) + 5);
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strcpy(name, p);
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strcpy(name + n, ".pag");
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if ((pagf = open(name, O_RDONLY)) < 0)
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oops("cannot open %s.", name);
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sdump(pagf);
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}
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else
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oops("usage: %s dbname", progname);
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return 0;
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}
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sdump(pagf)
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int pagf;
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{
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register r;
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register n = 0;
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register o = 0;
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char pag[PBLKSIZ];
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while ((r = read(pagf, pag, PBLKSIZ)) > 0) {
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if (!okpage(pag))
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fprintf(stderr, "%d: bad page.\n", n);
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else if (empty(pag))
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o++;
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else
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dispage(pag);
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n++;
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}
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if (r == 0)
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fprintf(stderr, "%d pages (%d holes).\n", n, o);
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else
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oops("read failed: block %d", n);
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}
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#ifdef OLD
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dispage(pag)
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char *pag;
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{
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register i, n;
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register off;
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register short *ino = (short *) pag;
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off = PBLKSIZ;
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for (i = 1; i < ino[0]; i += 2) {
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printf("\t[%d]: ", ino[i]);
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for (n = ino[i]; n < off; n++)
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putchar(pag[n]);
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putchar(' ');
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off = ino[i];
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printf("[%d]: ", ino[i + 1]);
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for (n = ino[i + 1]; n < off; n++)
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putchar(pag[n]);
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off = ino[i + 1];
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putchar('\n');
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}
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}
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#else
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dispage(pag)
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char *pag;
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{
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register i, n;
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register off;
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register short *ino = (short *) pag;
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off = PBLKSIZ;
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for (i = 1; i < ino[0]; i += 2) {
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for (n = ino[i]; n < off; n++)
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if (pag[n] != 0)
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putchar(pag[n]);
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putchar('\t');
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off = ino[i];
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for (n = ino[i + 1]; n < off; n++)
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if (pag[n] != 0)
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putchar(pag[n]);
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putchar('\n');
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off = ino[i + 1];
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}
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}
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#endif
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