svn commit: samba r3702 - in branches/SAMBA_3_0/source/lib: .
vlendec at samba.org
vlendec at samba.org
Fri Nov 12 15:01:41 GMT 2004
Author: vlendec
Date: 2004-11-12 15:01:40 +0000 (Fri, 12 Nov 2004)
New Revision: 3702
WebSVN: http://websvn.samba.org/cgi-bin/viewcvs.cgi?view=rev&root=samba&rev=3702
Log:
This is a getpwnam-cache. It is mainly to speed up Samba with slow nss
backends such as nss_ldap.
Volker
Modified:
branches/SAMBA_3_0/source/lib/util_pw.c
Changeset:
Modified: branches/SAMBA_3_0/source/lib/util_pw.c
===================================================================
--- branches/SAMBA_3_0/source/lib/util_pw.c 2004-11-12 15:01:16 UTC (rev 3701)
+++ branches/SAMBA_3_0/source/lib/util_pw.c 2004-11-12 15:01:40 UTC (rev 3702)
@@ -52,10 +52,40 @@
SAFE_FREE(*buf);
}
+#define PWNAMCACHE_SIZE 4
+static struct passwd *pwnam_cache[PWNAMCACHE_SIZE];
+static BOOL pwnam_cache_initialized = False;
+
+static void init_pwnam_cache(void)
+{
+ int i;
+
+ if (pwnam_cache_initialized)
+ return;
+
+ for (i=0; i<PWNAMCACHE_SIZE; i++)
+ pwnam_cache[i] = NULL;
+
+ pwnam_cache_initialized = True;
+ return;
+}
+
struct passwd *getpwnam_alloc(const char *name)
{
+ int i;
+
struct passwd *temp;
+ init_pwnam_cache();
+
+ for (i=0; i<PWNAMCACHE_SIZE; i++) {
+ if ((pwnam_cache[i] != NULL) &&
+ (strcmp(name, pwnam_cache[i]->pw_name) == 0)) {
+ DEBUG(10, ("Got %s from pwnam_cache\n", name));
+ return alloc_copy_passwd(pwnam_cache[i]);
+ }
+ }
+
temp = sys_getpwnam(name);
if (!temp) {
@@ -67,6 +97,19 @@
return NULL;
}
+ for (i=0; i<PWNAMCACHE_SIZE; i++) {
+ if (pwnam_cache[i] == NULL)
+ break;
+ }
+
+ if (i == PWNAMCACHE_SIZE)
+ i = rand() % PWNAMCACHE_SIZE;
+
+ if (pwnam_cache[i] != NULL)
+ passwd_free(&pwnam_cache[i]);
+
+ pwnam_cache[i] = alloc_copy_passwd(temp);
+
return alloc_copy_passwd(temp);
}
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