继续分析：
setup_conversion();
展开：
其实质是：
运行命令："/home/pgsql/project/bin/postgres" --single -F -O -c search_path=pg_catalog -c exit_on_error=true template1 >/dev/null
传递参数：/home/pgsql/project/share/conversion_create.sql
/* * load conversion functions */ static void setup_conversion(void) { PG_CMD_DECL; char **line; char **conv_lines; fputs(_("creating conversions ... "), stdout); fflush(stdout); snprintf(cmd, sizeof(cmd), "\"%s\" %s template1 >%s", backend_exec, backend_options, DEVNULL); PG_CMD_OPEN; conv_lines = readfile(conversion_file); for (line = conv_lines; *line != NULL; line++) { if (strstr(*line, "DROP CONVERSION") != *line) PG_CMD_PUTS(*line); free(*line); } free(conv_lines); PG_CMD_CLOSE; check_ok(); }
