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New function index_gc().

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default 2023-02-23 10:42:09 +01:00
parent 4eec215729
commit 307c9420c3
2 changed files with 43 additions and 0 deletions
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42
data.c
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@ -285,6 +285,48 @@ int index_add(const char *fn, const char *id)
}
int index_gc(const char *fn)
/* garbage-collects an index, deleting objects that are not here */
{
FILE *i, *o;
int gc = -1;
pthread_mutex_lock(&data_mutex);
if ((i = fopen(fn, "r")) != NULL) {
xs *nfn = xs_fmt("%s.new", fn);
char line[256];
if ((o = fopen(nfn, "w")) != NULL) {
gc = 0;
while (fgets(line, sizeof(line), i) != NULL) {
line[32] = '\0';
if (object_here_by_md5(line))
fprintf(o, "%s\n", line);
else
gc++;
}
fclose(o);
xs *ofn = xs_fmt("%s.bak", fn);
unlink(ofn);
link(fn, ofn);
rename(nfn, fn);
}
fclose(i);
}
pthread_mutex_unlock(&data_mutex);
return gc;
}
int index_del_md5(const char *fn, const char *md5)
/* deletes an md5 from an index */
{

1
snac.h
View file

@ -60,6 +60,7 @@ double mtime_nl(const char *fn, int *n_link);
#define mtime(fn) mtime_nl(fn, NULL)
int index_add(const char *fn, const char *md5);
int index_gc(const char *fn);
int index_del(const char *fn, const char *md5);
int index_first(const char *fn, char *buf, int size);
int index_len(const char *fn);