1 files changed, 30 insertions, 0 deletions
diff --git a/src/lib/env-util.h b/src/lib/env-util.h
new file mode 100644
index 0000000..e5b87de
--- /dev/null
+++ b/src/lib/env-util.h
@@ -0,0 +1,30 @@
+#ifndef ENV_UTIL_H
+#define ENV_UTIL_H
+
+/* Add a new environment variable or replace an existing one.
+   Wrapper to setenv(). Note that setenv() often doesn't free memory used by
+   replaced environment, so don't keep repeatedly changing values in
+   environment. */
+void env_put(const char *name, const char *value);
+/* env_put() NULL-terminated array of name=value strings */
+void env_put_array(const char *const *envs);
+/* Remove a single environment. */
+void env_remove(const char *name);
+/* Clear all environment variables. */
+void env_clean(void);
+/* Clear all environment variables except what's listed in preserve_envs[] */
+void env_clean_except(const char *const preserve_envs[]);
+
+/* Save a copy of the current environment. */
+struct env_backup *env_backup_save(void);
+/* Clear the current environment and restore the backup. */
+void env_backup_restore(struct env_backup *env);
+/* Free the memory used by environment backup. */
+void env_backup_free(struct env_backup **env);
+
+/* Returns the value of "&environ". This is more portable than using it
+   directly. */
+char ***env_get_environ_p(void);
+
+
+#endif