1 files changed, 89 insertions, 0 deletions
diff --git a/source3/lib/util_pw.c b/source3/lib/util_pw.c
new file mode 100644
index 0000000000..428378505f
--- /dev/null
+++ b/source3/lib/util_pw.c
@@ -0,0 +1,89 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   Safe versions of getpw* calls
+
+   Copyright (C) Andrew Bartlett 2002
+   
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+
+struct passwd *tcopy_passwd(TALLOC_CTX *mem_ctx, const struct passwd *from) 
+{
+	struct passwd *ret = TALLOC_P(mem_ctx, struct passwd);
+	if (!ret) {
+		return NULL;
+	}
+	ret->pw_name = talloc_strdup(ret, from->pw_name);
+	ret->pw_passwd = talloc_strdup(ret, from->pw_passwd);
+	ret->pw_uid = from->pw_uid;
+	ret->pw_gid = from->pw_gid;
+	ret->pw_gecos = talloc_strdup(ret, from->pw_gecos);
+	ret->pw_dir = talloc_strdup(ret, from->pw_dir);
+	ret->pw_shell = talloc_strdup(ret, from->pw_shell);
+	return ret;
+}
+
+void flush_pwnam_cache(void)
+{
+	memcache_flush(NULL, GETPWNAM_CACHE);
+}
+
+struct passwd *getpwnam_alloc(TALLOC_CTX *mem_ctx, const char *name)
+{
+	struct passwd *temp, *cached;
+
+	temp = (struct passwd *)memcache_lookup_talloc(
+		NULL, GETPWNAM_CACHE, data_blob_string_const(name));
+	if (temp != NULL) {
+		return tcopy_passwd(mem_ctx, temp);
+	}
+
+	temp = sys_getpwnam(name);
+	if (temp == NULL) {
+		return NULL;
+	}
+
+	cached = tcopy_passwd(NULL, temp);
+	if (cached == NULL) {
+		/*
+		 * Just don't add this into the cache, ignore the failure
+		 */
+		return temp;
+	}
+
+	memcache_add_talloc(NULL, GETPWNAM_CACHE, data_blob_string_const(name),
+			    cached);
+	return tcopy_passwd(mem_ctx, temp);
+}
+
+struct passwd *getpwuid_alloc(TALLOC_CTX *mem_ctx, uid_t uid) 
+{
+	struct passwd *temp;
+
+	temp = sys_getpwuid(uid);
+	
+	if (!temp) {
+#if 0
+		if (errno == ENOMEM) {
+			/* what now? */
+		}
+#endif
+		return NULL;
+	}
+
+	return tcopy_passwd(mem_ctx, temp);
+}