Function pg_split_opts

src/backend/utils/init/postinit.c:522–567

* pg_split_opts -- split a string of options and append it to an argv array * * The caller is responsible for ensuring the argv array is large enough. The * maximum possible number of arguments added by this routine is * (strlen(optstr) + 1) / 2. * * Because some option values can contain spaces we allow escaping using * backslashes, with \\ representing a literal backslash. */

 * backslashes, with \\ representing a literal backslash.
 */
void
pg_split_opts(char **argv, int *argcp, const char *optstr)
{
	StringInfoData s;

	initStringInfo(&s);

	while (*optstr)
	{
		bool		last_was_escape = false;

		resetStringInfo(&s);

		/* skip over leading space */
		while (isspace((unsigned char) *optstr))
			optstr++;

		if (*optstr == '\0')
			break;

		/*
		 * Parse a single option, stopping at the first space, unless it's
		 * escaped.
		 */
		while (*optstr)
		{
			if (isspace((unsigned char) *optstr) && !last_was_escape)
				break;

			if (!last_was_escape && *optstr == '\\')
				last_was_escape = true;
			else
			{
				last_was_escape = false;
				appendStringInfoChar(&s, *optstr);
			}

			optstr++;
		}

		/* now store the option in the next argv[] position */
		argv[(*argcp)++] = pstrdup(s.data);
	}

	pfree(s.data);
}

/*
 * Initialize MaxBackends value from config options.