move imported udev into place

[elogind.git] / src / udev / udev-builtin-firmware.c

diff --git a/src/udev/udev-builtin-firmware.c b/src/udev/udev-builtin-firmware.c
new file mode 100644 (file)
index 0000000..d212c64
--- /dev/null
+++ b/src/udev/udev-builtin-firmware.c
@@ -0,0 +1,168 @@
+/*
+ * 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) {
+                err(udev, "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) {
+                err(udev,"No memory available to load firmware file");
+                return false;
+        }
+
+        info(udev, "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;
+        struct utsname kernel;
+        struct stat statbuf;
+        unsigned int i;
+        int rc = EXIT_SUCCESS;
+
+        firmware = udev_device_get_property_value(dev, "FIRMWARE");
+        if (firmware == NULL) {
+                err(udev, "firmware parameter missing\n\n");
+                rc = EXIT_FAILURE;
+                goto exit;
+        }
+
+        /* lookup firmware file */
+        uname(&kernel);
+        for (i = 0; i < ARRAY_SIZE(searchpath); i++) {
+                util_strscpyl(fwpath, sizeof(fwpath), searchpath[i], kernel.release, "/", firmware, NULL);
+                dbg(udev, "trying %s\n", fwpath);
+                fwfile = fopen(fwpath, "re");
+                if (fwfile != NULL)
+                        break;
+
+                util_strscpyl(fwpath, sizeof(fwpath), searchpath[i], firmware, NULL);
+                dbg(udev, "trying %s\n", fwpath);
+                fwfile = fopen(fwpath, "re");
+                if (fwfile != NULL)
+                        break;
+        }
+
+        util_path_encode(firmware, fwencpath, sizeof(fwencpath));
+        util_strscpyl(misspath, sizeof(misspath), udev_get_run_path(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 */
+                info(udev, "did not find firmware file '%s'\n", firmware);
+                do {
+                        err = util_create_path(udev, misspath);
+                        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)) {
+                err(udev, "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,
+};