From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Wed, 8 Oct 2025 19:10:20 +0000 (+0900)
Subject: iovec-wrapper: introduce iovw_put_string_fieldf()
X-Git-Tag: v259-rc1~277^2~1
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d10596a6e02299ad86008fd5230a1420677c4c6e;p=thirdparty%2Fsystemd.git

iovec-wrapper: introduce iovw_put_string_fieldf()
---

diff --git a/src/basic/iovec-wrapper.c b/src/basic/iovec-wrapper.c
index 0071893411e..b4519f808d5 100644
--- a/src/basic/iovec-wrapper.c
+++ b/src/basic/iovec-wrapper.c
@@ -1,5 +1,7 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 
+#include <stdio.h>
+
 #include "alloc-util.h"
 #include "iovec-util.h"
 #include "iovec-wrapper.h"
@@ -84,6 +86,22 @@ int iovw_put_string_field_full(struct iovec_wrapper *iovw, bool replace, const c
         return r;
 }
 
+int iovw_put_string_fieldf_full(struct iovec_wrapper *iovw, bool replace, const char *field, const char *format, ...) {
+        _cleanup_free_ char *value = NULL;
+        va_list ap;
+        int r;
+
+        assert(format);
+
+        va_start(ap, format);
+        r = vasprintf(&value, format, ap);
+        va_end(ap);
+        if (r < 0)
+                return -ENOMEM;
+
+        return iovw_put_string_field_full(iovw, replace, field, value);
+}
+
 int iovw_put_string_field_free(struct iovec_wrapper *iovw, const char *field, char *value) {
         _cleanup_free_ _unused_ char *free_ptr = value;
 
diff --git a/src/basic/iovec-wrapper.h b/src/basic/iovec-wrapper.h
index 33a91df1ca6..94b39feb152 100644
--- a/src/basic/iovec-wrapper.h
+++ b/src/basic/iovec-wrapper.h
@@ -40,6 +40,9 @@ static inline int iovw_put_string_field(struct iovec_wrapper *iovw, const char *
 static inline int iovw_replace_string_field(struct iovec_wrapper *iovw, const char *field, const char *value) {
         return iovw_put_string_field_full(iovw, true, field, value);
 }
+int iovw_put_string_fieldf_full(struct iovec_wrapper *iovw, bool replace, const char *field, const char *format, ...) _printf_(4, 5);
+#define iovw_put_string_fieldf(iovw, ...)     iovw_put_string_fieldf_full(iovw, false, __VA_ARGS__)
+#define iovw_replace_string_fieldf(iovw, ...) iovw_put_string_fieldf_full(iovw, true, __VA_ARGS__)
 int iovw_put_string_field_free(struct iovec_wrapper *iovw, const char *field, char *value);
 void iovw_rebase(struct iovec_wrapper *iovw, void *old, void *new);
 size_t iovw_size(const struct iovec_wrapper *iovw);