Function prep_childenv

run-command.c:450–497

}

static char **prep_childenv(const char *const *deltaenv)
{
	extern char **environ;
	char **childenv;
	struct string_list env = STRING_LIST_INIT_DUP;
	struct strbuf key = STRBUF_INIT;
	const char *const *p;
	int i;

	/* Construct a sorted string list consisting of the current environ */
	for (p = (const char *const *) environ; p && *p; p++) {
		const char *equals = strchr(*p, '=');

		if (equals) {
			strbuf_reset(&key);
			strbuf_add(&key, *p, equals - *p);
			string_list_append(&env, key.buf)->util = (void *) *p;
		} else {
			string_list_append(&env, *p)->util = (void *) *p;
		}
	}
	string_list_sort(&env);

	/* Merge in 'deltaenv' with the current environ */
	for (p = deltaenv; p && *p; p++) {
		const char *equals = strchr(*p, '=');

		if (equals) {
			/* ('key=value'), insert or replace entry */
			strbuf_reset(&key);
			strbuf_add(&key, *p, equals - *p);
			string_list_insert(&env, key.buf)->util = (void *) *p;
		} else {
			/* otherwise ('key') remove existing entry */
			string_list_remove(&env, *p, 0);
		}
	}

	/* Create an array of 'char *' to be used as the childenv */
	ALLOC_ARRAY(childenv, env.nr + 1);
	for (i = 0; i < env.nr; i++)
		childenv[i] = env.items[i].util;
	childenv[env.nr] = NULL;

	string_list_clear(&env, 0);
	strbuf_release(&key);
	return childenv;
}

struct atfork_state {
#ifndef NO_PTHREADS