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/*
* dba dbm analysis/recovery
*/
#include <stdio.h>
#include <sys/file.h>
#include "EXTERN.h"
#include "sdbm.h"
char *progname;
extern void oops();
int
main(int argc, char **argv)
{
int n;
char *p;
char *name;
int pagf;
progname = argv[0];
if (p = argv[1]) {
name = (char *) malloc((n = strlen(p)) + 5);
if (!name)
oops("cannot get memory");
strcpy(name, p);
strcpy(name + n, ".pag");
if ((pagf = open(name, O_RDONLY)) < 0)
oops("cannot open %s.", name);
sdump(pagf);
}
else
oops("usage: %s dbname", progname);
return 0;
}
void
sdump(int pagf)
{
int b;
int n = 0;
int t = 0;
int o = 0;
int e;
char pag[PBLKSIZ];
while ((b = read(pagf, pag, PBLKSIZ)) > 0) {
printf("#%d: ", n);
if (!okpage(pag))
printf("bad\n");
else {
printf("ok. ");
if (!(e = pagestat(pag)))
o++;
else
t += e;
}
n++;
}
if (b == 0)
printf("%d pages (%d holes): %d entries\n", n, o, t);
else
oops("read failed: block %d", n);
}
int
pagestat(char *pag)
{
int n;
int free;
short *ino = (short *) pag;
if (!(n = ino[0]))
printf("no entries.\n");
else {
free = ino[n] - (n + 1) * sizeof(short);
printf("%3d entries %2d%% used free %d.\n",
n / 2, ((PBLKSIZ - free) * 100) / PBLKSIZ, free);
}
return n / 2;
}
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