nsssrv: add string manipulation helper

the sized_string structure makes it easier to keep track of string lengths
and makes passing around data more compat and readable.

2 files changed, 19 insertions, 0 deletions

diff --git a/src/responder/nss/nsssrv.h b/src/responder/nss/nsssrv.h
index 01a2810c..5e365d7b 100644
--- a/src/responder/nss/nsssrv.h
+++ b/src/responder/nss/nsssrv.h
@@ -71,4 +71,12 @@ int nss_cmd_execute(struct cli_ctx *cctx);
 
 struct sss_cmd_table *get_nss_cmds(void);
 
+/* len includes terminating '\0' */
+struct sized_string {
+    const char *str;
+    size_t len;
+};
+
+void to_sized_string(struct sized_string *out, const char *in);
+
 #endif /* __NSSSRV_H__ */
diff --git a/src/responder/nss/nsssrv_cmd.c b/src/responder/nss/nsssrv_cmd.c
index 3bc30ab8..85876d3b 100644
--- a/src/responder/nss/nsssrv_cmd.c
+++ b/src/responder/nss/nsssrv_cmd.c
@@ -28,6 +28,17 @@
 #include "db/sysdb.h"
 #include <time.h>
 
+/* out->len includes terminating '\0' */
+void to_sized_string(struct sized_string *out, const char *in)
+{
+    out->str = in;
+    if (out->str) {
+        out->len = strlen(out->str) + 1;
+    } else {
+        out->len = 0;
+    }
+}
+
 static int nss_cmd_send_error(struct nss_cmd_ctx *cmdctx, int err)
 {
     struct cli_ctx *cctx = cmdctx->cctx;