/* * firmware - Kernel firmware loader * * Copyright (C) 2009 Piter Punk <piterpunk@slackware.com> * Copyright (C) 2009-2011 Kay Sievers <kay.sievers@vrfy.org> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of the * License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details:* */ #include <unistd.h> #include <stdlib.h> #include <string.h> #include <stdio.h> #include <getopt.h> #include <errno.h> #include <stdbool.h> #include <sys/utsname.h> #include <sys/stat.h> #include "udev.h" static bool set_loading(struct udev *udev, char *loadpath, const char *state) { FILE *ldfile; ldfile = fopen(loadpath, "we"); if (ldfile == NULL) { log_error("error: can not open '%s'\n", loadpath); return false; }; fprintf(ldfile, "%s\n", state); fclose(ldfile); return true; } static bool copy_firmware(struct udev *udev, const char *source, const char *target, size_t size) { char *buf; FILE *fsource = NULL, *ftarget = NULL; bool ret = false; buf = malloc(size); if (buf == NULL) { log_error("No memory available to load firmware file"); return false; } log_debug("writing '%s' (%zi) to '%s'\n", source, size, target); fsource = fopen(source, "re"); if (fsource == NULL) goto exit; ftarget = fopen(target, "we"); if (ftarget == NULL) goto exit; if (fread(buf, size, 1, fsource) != 1) goto exit; if (fwrite(buf, size, 1, ftarget) == 1) ret = true; exit: if (ftarget != NULL) fclose(ftarget); if (fsource != NULL) fclose(fsource); free(buf); return ret; } static int builtin_firmware(struct udev_device *dev, int argc, char *argv[], bool test) { struct udev *udev = udev_device_get_udev(dev); static const char *searchpath[] = { FIRMWARE_PATH }; char fwencpath[UTIL_PATH_SIZE]; char misspath[UTIL_PATH_SIZE]; char loadpath[UTIL_PATH_SIZE]; char datapath[UTIL_PATH_SIZE]; char fwpath[UTIL_PATH_SIZE]; const char *firmware; FILE *fwfile = NULL; struct utsname kernel; struct stat statbuf; unsigned int i; int rc = EXIT_SUCCESS; firmware = udev_device_get_property_value(dev, "FIRMWARE"); if (firmware == NULL) { log_error("firmware parameter missing\n\n"); rc = EXIT_FAILURE; goto exit; } /* lookup firmware file */ uname(&kernel); for (i = 0; i < ELEMENTSOF(searchpath); i++) { util_strscpyl(fwpath, sizeof(fwpath), searchpath[i], kernel.release, "/", firmware, NULL); fwfile = fopen(fwpath, "re"); if (fwfile != NULL) break; util_strscpyl(fwpath, sizeof(fwpath), searchpath[i], firmware, NULL); fwfile = fopen(fwpath, "re"); if (fwfile != NULL) break; } util_path_encode(firmware, fwencpath, sizeof(fwencpath)); util_strscpyl(misspath, sizeof(misspath), "/run/udev/firmware-missing/", fwencpath, NULL); util_strscpyl(loadpath, sizeof(loadpath), udev_device_get_syspath(dev), "/loading", NULL); if (fwfile == NULL) { int err; /* This link indicates the missing firmware file and the associated device */ log_debug("did not find firmware file '%s'\n", firmware); do { err = mkdir_parents(misspath, 0755); if (err != 0 && err != -ENOENT) break; err = symlink(udev_device_get_devpath(dev), misspath); if (err != 0) err = -errno; } while (err == -ENOENT); rc = EXIT_FAILURE; set_loading(udev, loadpath, "-1"); goto exit; } if (stat(fwpath, &statbuf) < 0 || statbuf.st_size == 0) { rc = EXIT_FAILURE; goto exit; } if (unlink(misspath) == 0) util_delete_path(udev, misspath); if (!set_loading(udev, loadpath, "1")) goto exit; util_strscpyl(datapath, sizeof(datapath), udev_device_get_syspath(dev), "/data", NULL); if (!copy_firmware(udev, fwpath, datapath, statbuf.st_size)) { log_error("error sending firmware '%s' to device\n", firmware); set_loading(udev, loadpath, "-1"); rc = EXIT_FAILURE; goto exit; }; set_loading(udev, loadpath, "0"); exit: if (fwfile) fclose(fwfile); return rc; } const struct udev_builtin udev_builtin_firmware = { .name = "firmware", .cmd = builtin_firmware, .help = "kernel firmware loader", .run_once = true, };