clib_error_t * vlib_sysfs_read (char *file_name, char *fmt, ...) { unformat_input_t input; u8 *s = 0; int fd; ssize_t sz; uword result; fd = open (file_name, O_RDONLY); if (fd < 0) return clib_error_return_unix (0, "open `%s'", file_name); vec_validate (s, 4095); sz = read (fd, s, vec_len (s)); if (sz < 0) { close (fd); vec_free (s); return clib_error_return_unix (0, "read `%s'", file_name); } _vec_len (s) = sz; unformat_init_vector (&input, s); va_list va; va_start (va, fmt); result = va_unformat (&input, fmt, &va); va_end (va); vec_free (s); close (fd); if (result == 0) return clib_error_return (0, "unformat error"); return 0; }
static uword startup_config_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f) { unix_main_t *um = &unix_main; u8 *buf = 0; uword l, n = 1; vlib_process_suspend (vm, 2.0); while (um->unix_config_complete == 0) vlib_process_suspend (vm, 0.1); if (um->startup_config_filename) { unformat_input_t sub_input; int fd; struct stat s; char *fn = (char *) um->startup_config_filename; fd = open (fn, O_RDONLY); if (fd < 0) { clib_warning ("failed to open `%s'", fn); return 0; } if (fstat (fd, &s) < 0) { clib_warning ("failed to stat `%s'", fn); bail: close (fd); return 0; } if (!(S_ISREG (s.st_mode) || S_ISLNK (s.st_mode))) { clib_warning ("not a regular file: `%s'", fn); goto bail; } while (n > 0) { l = vec_len (buf); vec_resize (buf, 4096); n = read (fd, buf + l, 4096); if (n > 0) { _vec_len (buf) = l + n; if (n < 4096) break; } else break; } if (um->log_fd && vec_len (buf)) { u8 *lv = 0; lv = format (lv, "%U: ***** Startup Config *****\n%v", format_timeval, 0 /* current bat-time */ , 0 /* current bat-format */ , buf); { int rv __attribute__ ((unused)) = write (um->log_fd, lv, vec_len (lv)); } vec_reset_length (lv); lv = format (lv, "%U: ***** End Startup Config *****\n", format_timeval, 0 /* current bat-time */ , 0 /* current bat-format */ ); { int rv __attribute__ ((unused)) = write (um->log_fd, lv, vec_len (lv)); } vec_free (lv); } if (vec_len (buf)) { unformat_init_vector (&sub_input, buf); vlib_cli_input (vm, &sub_input, 0, 0); /* frees buf for us */ unformat_free (&sub_input); } close (fd); } return 0; }