1 files changed, 81 insertions, 0 deletions
diff --git a/src/basic/env-util.h b/src/basic/env-util.h
new file mode 100644
index 0000000..f7fb1e9
--- /dev/null
+++ b/src/basic/env-util.h
@@ -0,0 +1,81 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include "macro.h"
+#include "string.h"
+
+static inline size_t sc_arg_max(void) {
+        long l = sysconf(_SC_ARG_MAX);
+        assert(l > 0);
+        return (size_t) l;
+}
+
+bool env_name_is_valid(const char *e);
+bool env_value_is_valid(const char *e);
+bool env_assignment_is_valid(const char *e);
+
+typedef enum ReplaceEnvFlags {
+        REPLACE_ENV_USE_ENVIRONMENT = 1 << 0,
+        REPLACE_ENV_ALLOW_BRACELESS = 1 << 1,
+        REPLACE_ENV_ALLOW_EXTENDED  = 1 << 2,
+} ReplaceEnvFlags;
+
+int replace_env_full(const char *format, size_t n, char **env, ReplaceEnvFlags flags, char **ret, char ***ret_unset_variables, char ***ret_bad_variables);
+static inline int replace_env(const char *format, char **env, ReplaceEnvFlags flags, char **ret) {
+        return replace_env_full(format, SIZE_MAX, env, flags, ret, NULL, NULL);
+}
+
+int replace_env_argv(char **argv, char **env, char ***ret, char ***ret_unset_variables, char ***ret_bad_variables);
+
+bool strv_env_is_valid(char **e);
+#define strv_env_clean(l) strv_env_clean_with_callback(l, NULL, NULL)
+char **strv_env_clean_with_callback(char **l, void (*invalid_callback)(const char *p, void *userdata), void *userdata);
+
+bool strv_env_name_is_valid(char **l);
+bool strv_env_name_or_assignment_is_valid(char **l);
+
+char** _strv_env_merge(char **first, ...);
+#define strv_env_merge(first, ...) _strv_env_merge(first, __VA_ARGS__, POINTER_MAX)
+char **strv_env_delete(char **x, size_t n_lists, ...); /* New copy */
+
+char **strv_env_unset(char **l, const char *p); /* In place ... */
+char **strv_env_unset_many(char **l, ...) _sentinel_;
+int strv_env_replace_consume(char ***l, char *p); /* In place ... */
+int strv_env_replace_strdup(char ***l, const char *assignment);
+int strv_env_replace_strdup_passthrough(char ***l, const char *assignment);
+int strv_env_assign(char ***l, const char *key, const char *value);
+int _strv_env_assign_many(char ***l, ...) _sentinel_;
+#define strv_env_assign_many(l, ...) _strv_env_assign_many(l, __VA_ARGS__, NULL)
+
+char *strv_env_get_n(char **l, const char *name, size_t k, ReplaceEnvFlags flags) _pure_;
+static inline char *strv_env_get(char **x, const char *n) {
+        return strv_env_get_n(x, n, SIZE_MAX, 0);
+}
+
+char *strv_env_pairs_get(char **l, const char *name) _pure_;
+
+int getenv_bool(const char *p);
+int getenv_bool_secure(const char *p);
+
+int getenv_uint64_secure(const char *p, uint64_t *ret);
+
+/* Like setenv, but calls unsetenv if value == NULL. */
+int set_unset_env(const char *name, const char *value, bool overwrite);
+
+/* Like putenv, but duplicates the memory like setenv. */
+int putenv_dup(const char *assignment, bool override);
+
+int setenv_systemd_exec_pid(bool update_only);
+
+/* Parses and does sanity checks on an environment variable containing
+ * PATH-like colon-separated absolute paths */
+int getenv_path_list(const char *name, char ***ret_paths);
+
+int getenv_steal_erase(const char *name, char **ret);
+
+int set_full_environment(char **env);