From: Michael Tremer <michael.tremer@ipfire.org>
Date: Sun, 5 Jan 2025 17:14:25 +0000 (+0000)
Subject: env: Add a function to append values
X-Git-Tag: 0.9.30~518
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=257cac6234ca334cd05749d3708aee801c807c63;p=people%2Fms%2Fpakfire.git

env: Add a function to append values

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
---

diff --git a/src/pakfire/env.c b/src/pakfire/env.c
index d519bc9c8..9ea23019c 100644
--- a/src/pakfire/env.c
+++ b/src/pakfire/env.c
@@ -161,6 +161,31 @@ int pakfire_env_set(struct pakfire_env* env, const char* key, const char* format
 	return 0;
 }
 
+// Appends something to an environment variable, separated by :
+int pakfire_env_append(struct pakfire_env* env, const char* key, const char* format, ...) {
+	const char* old_value = NULL;
+	char value[PATH_MAX];
+	va_list args;
+	int r;
+
+	// Format the value
+	va_start(args, format);
+	r = pakfire_string_vformat(value, format, args);
+	va_end(args);
+	if (r < 0)
+		return r;
+
+	// Fetch the old value
+	old_value = pakfire_env_get(env, key);
+
+	// If there was no previous value, we will just set the new value
+	if (!old_value)
+		return pakfire_env_set(env, key, "%s", value);
+
+	// Otherwise we will append it separated by :
+	return pakfire_env_set(env, key, "%s:%s", old_value, value);
+}
+
 // Imports an environment
 int pakfire_env_import(struct pakfire_env* env, const char** e) {
 	char* key = NULL;
diff --git a/src/pakfire/env.h b/src/pakfire/env.h
index ff720fe99..3fb911639 100644
--- a/src/pakfire/env.h
+++ b/src/pakfire/env.h
@@ -35,6 +35,8 @@ char** pakfire_env_get_envp(struct pakfire_env* env);
 const char* pakfire_env_get(struct pakfire_env* env, const char* key);
 int pakfire_env_set(struct pakfire_env* env, const char* key, const char* format, ...)
 	__attribute__((format(printf, 3, 4)));
+int pakfire_env_append(struct pakfire_env* env, const char* key, const char* format, ...)
+	__attribute__((format(printf, 3, 4)));
 
 int pakfire_env_import(struct pakfire_env* env, const char** e);