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Generalize framework to register monitoring of files in nscd

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nscd can clear caches when certain files change.  The list of files
was hardcoded so far and worked for nss_files and nss_dns and those
modules which need no monitoring.  nss_db, for instance, has its
own set of files to monitor.  Now the NSS modules themselves can
request that certain files are monitored.
This commit is contained in:
Ulrich Drepper
2011-07-11 14:50:24 -04:00
parent 23bee3e867
commit 319b9ad4bc
12 changed files with 446 additions and 159 deletions
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46
nscd/cache.c
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@@ -264,28 +264,40 @@ prune_cache (struct database_dyn *table, time_t now, int fd)
/* If we check for the modification of the underlying file we invalidate
the entries also in this case. */
if (table->inotify_descr < 0 && table->check_file && now != LONG_MAX)
if (table->check_file && now != LONG_MAX)
{
struct stat64 st;
struct traced_file *runp = table->traced_files;
if (stat64 (table->filename, &st) < 0)
while (runp != NULL)
{
char buf[128];
/* We cannot stat() the file, disable file checking if the
file does not exist. */
dbg_log (_("cannot stat() file `%s': %s"),
table->filename, strerror_r (errno, buf, sizeof (buf)));
if (errno == ENOENT)
table->check_file = 0;
}
else
{
if (st.st_mtime != table->file_mtime)
#ifdef HAVE_INOTIFY
if (runp->inotify_descr == -1)
#endif
{
/* The file changed. Invalidate all entries. */
now = LONG_MAX;
table->file_mtime = st.st_mtime;
struct stat64 st;
if (stat64 (runp->fname, &st) < 0)
{
char buf[128];
/* We cannot stat() the file, disable file checking if the
file does not exist. */
dbg_log (_("cannot stat() file `%s': %s"),
runp->fname, strerror_r (errno, buf, sizeof (buf)));
if (errno == ENOENT)
table->check_file = 0;
}
else
{
if (st.st_mtime != table->file_mtime)
{
/* The file changed. Invalidate all entries. */
now = LONG_MAX;
table->file_mtime = st.st_mtime;
}
}
}
runp = runp->next;
}
}