+#define _GNU_SOURCE
+
#include <stdio.h>
#include <stdlib.h>
+#include <stdarg.h>
#include <stdint.h>
#include <unistd.h>
#include <sys/types.h>
#include <errno.h>
#include <string.h>
#include <asm/byteorder.h>
+#include <linux/cdrom.h>
+#include <sys/ioctl.h>
-#include "udev-helper.h"
+#include "parser.h"
+#include "paths.h"
#include "petitboot-paths.h"
-extern struct parser native_parser;
-extern struct parser yaboot_parser;
-static FILE *logf;
-static int sock;
+/* Define below to operate without the frontend */
+#undef USE_FAKE_SOCKET
-/* array of parsers, ordered by priority */
-static struct parser *parsers[] = {
- &native_parser,
- &yaboot_parser,
- NULL
-};
+/* Delay in seconds between polling of removable devices */
+#define REMOVABLE_SLEEP_DELAY 2
-#define log(...) fprintf(logf, __VA_ARGS__)
+static FILE *logf;
+static int sock;
-static void iterate_parsers(const char *devpath, const char *mountpoint)
+void pb_log(const char *fmt, ...)
{
- int i;
-
- log("trying parsers for %s@%s\n", devpath, mountpoint);
+ va_list ap;
- for (i = 0; parsers[i]; i++) {
- log("\ttrying parser '%s'\n", parsers[i]->name);
- /* just use a dummy device path for now */
- if (parsers[i]->parse(devpath, mountpoint))
- return;
- }
- log("\tno boot_options found\n");
+ va_start(ap, fmt);
+ vfprintf(logf, fmt, ap);
+ va_end(ap);
}
static void print_boot_option(const struct boot_option *opt)
{
- log("\tname: %s\n", opt->name);
- log("\tdescription: %s\n", opt->description);
- log("\tboot_image: %s\n", opt->boot_image_file);
- log("\tinitrd: %s\n", opt->initrd_file);
- log("\tboot_args: %s\n", opt->boot_args);
+ pb_log("\tname: %s\n", opt->name);
+ pb_log("\tdescription: %s\n", opt->description);
+ pb_log("\tboot_image: %s\n", opt->boot_image_file);
+ pb_log("\tinitrd: %s\n", opt->initrd_file);
+ pb_log("\tboot_args: %s\n", opt->boot_args);
}
static void print_device(const struct device *dev)
{
- log("\tid: %s\n", dev->id);
- log("\tname: %s\n", dev->name);
- log("\tdescription: %s\n", dev->description);
- log("\tboot_image: %s\n", dev->icon_file);
-}
-
-
-void free_device(struct device *dev)
-{
- if (!dev)
- return;
- if (dev->id)
- free(dev->id);
- if (dev->name)
- free(dev->name);
- if (dev->description)
- free(dev->description);
- if (dev->icon_file)
- free(dev->icon_file);
- free(dev);
-}
-
-void free_boot_option(struct boot_option *opt)
-{
- if (!opt)
- return;
- if (opt->name)
- free(opt->name);
- if (opt->description)
- free(opt->description);
- if (opt->icon_file)
- free(opt->icon_file);
- if (opt->boot_image_file)
- free(opt->boot_image_file);
- if (opt->initrd_file)
- free(opt->initrd_file);
- if (opt->boot_args)
- free(opt->boot_args);
- free(opt);
+ pb_log("\tid: %s\n", dev->id);
+ pb_log("\tname: %s\n", dev->name);
+ pb_log("\tdescription: %s\n", dev->description);
+ pb_log("\tboot_image: %s\n", dev->icon_file);
}
static int write_action(int fd, enum device_action action)
if (!str) {
len_buf = 0;
if (write(fd, &len_buf, sizeof(len_buf)) != sizeof(len_buf)) {
- log("write failed: %s\n", strerror(errno));
+ pb_log("write failed: %s\n", strerror(errno));
return -1;
}
return 0;
len = strlen(str);
if (len > (1ull << (sizeof(len_buf) * 8 - 1))) {
- log("string too large\n");
+ pb_log("string too large\n");
return -1;
}
len_buf = __cpu_to_be32(len);
if (write(fd, &len_buf, sizeof(len_buf)) != sizeof(len_buf)) {
- log("write failed: %s\n", strerror(errno));
+ pb_log("write failed: %s\n", strerror(errno));
return -1;
}
while (pos < len) {
int rc = write(fd, str, len - pos);
if (rc <= 0) {
- log("write failed: %s\n", strerror(errno));
+ pb_log("write failed: %s\n", strerror(errno));
return -1;
}
pos += rc;
{
int rc;
- log("device added:\n");
+ pb_log("device added:\n");
print_device(dev);
rc = write_action(sock, DEV_ACTION_ADD_DEVICE) ||
write_string(sock, dev->id) ||
write_string(sock, dev->icon_file);
if (rc)
- log("error writing device %s to socket\n", dev->name);
+ pb_log("error writing device %s to socket\n", dev->name);
return rc;
}
{
int rc;
- log("boot option added:\n");
+ pb_log("boot option added:\n");
print_boot_option(opt);
rc = write_action(sock, DEV_ACTION_ADD_OPTION) ||
write_string(sock, opt->boot_args);
if (rc)
- log("error writing boot option %s to socket\n", opt->name);
+ pb_log("error writing boot option %s to socket\n", opt->name);
return rc;
}
int connect_to_socket()
{
-#if 1
+#ifndef USE_FAKE_SOCKET
int fd;
struct sockaddr_un addr;
fd = socket(PF_UNIX, SOCK_STREAM, 0);
if (fd == -1) {
- log("can't create socket: %s\n", strerror(errno));
+ pb_log("can't create socket: %s\n", strerror(errno));
return -1;
}
strcpy(addr.sun_path, PBOOT_DEVICE_SOCKET);
if (connect(fd, (struct sockaddr *)&addr, sizeof(addr))) {
- log("can't connect to %s: %s\n",
+ pb_log("can't connect to %s: %s\n",
addr.sun_path, strerror(errno));
return -1;
}
int fd;
fd = open("./debug_socket", O_WRONLY | O_CREAT, 0640);
if (fd < 0) {
- log("can't create output file: %s\n", strerror(errno));
+ pb_log("can't create output file: %s\n", strerror(errno));
return -1;
}
sock = fd;
#endif
}
-int mount_device(const char *dev_path, char *mount_path)
+static int mkdir_recursive(const char *dir)
{
- char *dir;
- const char *basename;
+ char *str, *sep;
+ int mode = 0755;
+ struct stat statbuf;
+
+ pb_log("mkdir_recursive(%s)\n", dir);
+
+ if (!*dir)
+ return 0;
+
+ if (!stat(dir, &statbuf)) {
+ if (!S_ISDIR(statbuf.st_mode)) {
+ pb_log("%s: %s exists, but isn't a directory\n",
+ __func__, dir);
+ return -1;
+ }
+ return 0;
+ }
+
+ str = strdup(dir);
+ sep = strchr(*str == '/' ? str + 1 : str, '/');
+
+ while (1) {
+
+ /* terminate the path at sep */
+ if (sep)
+ *sep = '\0';
+ pb_log("mkdir(%s)\n", str);
+
+ if (mkdir(str, mode) && errno != EEXIST) {
+ pb_log("mkdir(%s): %s\n", str, strerror(errno));
+ return -1;
+ }
+
+ if (!sep)
+ break;
+
+ /* reset dir to the full path */
+ strcpy(str, dir);
+ sep = strchr(sep + 1, '/');
+ }
+
+ free(str);
+
+ return 0;
+}
+
+static void setup_device_links(const char *device)
+{
+ struct link {
+ char *env, *dir;
+ } *link, links[] = {
+ {
+ .env = "ID_FS_UUID",
+ .dir = "disk/by-uuid"
+ },
+ {
+ .env = "ID_FS_LABEL",
+ .dir = "disk/by-label"
+ },
+ {
+ .env = NULL
+ }
+ };
+
+ for (link = links; link->env; link++) {
+ char *value, *dir, *path;
+
+ value = getenv(link->env);
+ if (!value)
+ continue;
+
+ value = encode_label(value);
+ dir = join_paths(TMP_DIR, link->dir);
+ path = join_paths(dir, value);
+
+ if (!mkdir_recursive(dir)) {
+ unlink(path);
+ if (symlink(mountpoint_for_device(device), path)) {
+ pb_log("symlink(%s): %s\n",
+ path, strerror(errno));
+ }
+ }
+
+ free(path);
+ free(dir);
+ free(value);
+ }
+}
+
+int mount_device(const char *dev_path)
+{
+ const char *dir;
int pid, status, rc = -1;
+ struct stat statbuf;
- basename = strrchr(dev_path, '/');
- if (basename)
- basename++;
- else
- basename = dev_path;
-
- /* create a unique mountpoint */
- dir = malloc(strlen(TMP_DIR) + 13 + strlen(basename));
- sprintf(dir, "%s/mnt-%s-XXXXXX", TMP_DIR, basename);
-
- if (!mkdtemp(dir)) {
- log("failed to create temporary directory in %s: %s",
- TMP_DIR, strerror(errno));
- goto out;
+ dir = mountpoint_for_device(dev_path);
+
+ if (stat(dir, &statbuf)) {
+ if (mkdir(dir, 0755)) {
+ pb_log("couldn't create directory %s: %s\n",
+ dir, strerror(errno));
+ goto out;
+ }
+ } else {
+ if (!S_ISDIR(statbuf.st_mode)) {
+ pb_log("mountpoint %s exists, "
+ "but isn't a directory\n", dir);
+ goto out;
+ }
}
+
pid = fork();
if (pid == -1) {
- log("%s: fork failed: %s\n", __FUNCTION__, strerror(errno));
+ pb_log("%s: fork failed: %s\n", __FUNCTION__, strerror(errno));
goto out;
}
}
if (waitpid(pid, &status, 0) == -1) {
- log("%s: waitpid failed: %s\n", __FUNCTION__, strerror(errno));
+ pb_log("%s: waitpid failed: %s\n", __FUNCTION__,
+ strerror(errno));
goto out;
}
if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
- strcpy(mount_path, dir);
+ setup_device_links(dev_path);
rc = 0;
}
out:
- free(dir);
return rc;
}
pid = fork();
if (pid == -1) {
- log("%s: fork failed: %s\n", __FUNCTION__, strerror(errno));
+ pb_log("%s: fork failed: %s\n", __FUNCTION__, strerror(errno));
return -1;
}
}
if (waitpid(pid, &status, 0) == -1) {
- log("%s: waitpid failed: %s\n", __FUNCTION__, strerror(errno));
+ pb_log("%s: waitpid failed: %s\n", __FUNCTION__,
+ strerror(errno));
return -1;
}
return rc;
}
-const char *generic_icon_file(enum generic_icon_type type)
-{
- switch (type) {
- case ICON_TYPE_DISK:
- return artwork_pathname("hdd.png");
- case ICON_TYPE_USB:
- return artwork_pathname("usbpen.png");
- case ICON_TYPE_OPTICAL:
- return artwork_pathname("cdrom.png");
- case ICON_TYPE_NETWORK:
- case ICON_TYPE_UNKNOWN:
- break;
- }
- return artwork_pathname("hdd.png");
-}
-
static const struct device fake_boot_devices[] =
{
{
enum generic_icon_type guess_device_type(void)
{
+ const char *type = getenv("ID_TYPE");
const char *bus = getenv("ID_BUS");
+ if (type && streq(type, "cd"))
+ return ICON_TYPE_OPTICAL;
+ if (!bus)
+ return ICON_TYPE_UNKNOWN;
if (streq(bus, "usb"))
return ICON_TYPE_USB;
if (streq(bus, "ata") || streq(bus, "scsi"))
return ICON_TYPE_UNKNOWN;
}
+
+static int is_removable_device(const char *sysfs_path)
+{
+ char full_path[PATH_MAX];
+ char buf[80];
+ int fd, buf_len;
+
+ sprintf(full_path, "/sys/%s/removable", sysfs_path);
+ fd = open(full_path, O_RDONLY);
+ pb_log(" -> removable check on %s, fd=%d\n", full_path, fd);
+ if (fd < 0)
+ return 0;
+ buf_len = read(fd, buf, 79);
+ close(fd);
+ if (buf_len < 0)
+ return 0;
+ buf[buf_len] = 0;
+ return strtol(buf, NULL, 10);
+}
+
+static int is_ignored_device(const char *devname)
+{
+ static const char *ignored_devices[] = { "/dev/ram", NULL };
+ const char **dev;
+
+ for (dev = ignored_devices; *dev; dev++)
+ if (!strncmp(devname, *dev, strlen(*dev)))
+ return 1;
+
+ return 0;
+}
+
+static int found_new_device(const char *dev_path)
+{
+ const char *mountpoint = mountpoint_for_device(dev_path);
+
+ if (mount_device(dev_path)) {
+ pb_log("failed to mount %s\n", dev_path);
+ return EXIT_FAILURE;
+ }
+
+ pb_log("mounted %s at %s\n", dev_path, mountpoint);
+
+ iterate_parsers(dev_path, mountpoint);
+
+ return EXIT_SUCCESS;
+}
+
+static void detach_and_sleep(int sec)
+{
+ static int forked = 0;
+ int rc = 0;
+
+ if (sec <= 0)
+ return;
+
+ if (!forked) {
+ pb_log("running in background...");
+ rc = fork();
+ forked = 1;
+ }
+
+ if (rc == 0) {
+ sleep(sec);
+
+ } else if (rc == -1) {
+ perror("fork()");
+ exit(EXIT_FAILURE);
+ } else {
+ exit(EXIT_SUCCESS);
+ }
+}
+
+static int poll_device_plug(const char *dev_path,
+ int *optical)
+{
+ int rc, fd;
+
+ /* Polling loop for optical drive */
+ for (; (*optical) != 0; ) {
+ pb_log("poll for optical drive insertion ...\n");
+ fd = open(dev_path, O_RDONLY|O_NONBLOCK);
+ if (fd < 0)
+ return EXIT_FAILURE;
+ rc = ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
+ close(fd);
+ if (rc == -1) {
+ pb_log("not an optical drive, fallback...\n");
+ break;
+ }
+ *optical = 1;
+ if (rc == CDS_DISC_OK)
+ return EXIT_SUCCESS;
+
+ pb_log("no... waiting\n");
+ detach_and_sleep(REMOVABLE_SLEEP_DELAY);
+ }
+
+ /* Fall back to bare open() */
+ *optical = 0;
+ for (;;) {
+ pb_log("poll for non-optical drive insertion ...\n");
+ fd = open(dev_path, O_RDONLY);
+ if (fd < 0 && errno != ENOMEDIUM)
+ return EXIT_FAILURE;
+ close(fd);
+ if (fd >= 0)
+ return EXIT_SUCCESS;
+ pb_log("no... waiting\n");
+ detach_and_sleep(REMOVABLE_SLEEP_DELAY);
+ }
+}
+
+static int poll_device_unplug(const char *dev_path, int optical)
+{
+ int rc, fd;
+
+ for (;optical;) {
+ pb_log("poll for optical drive removal ...\n");
+ fd = open(dev_path, O_RDONLY|O_NONBLOCK);
+ if (fd < 0)
+ return EXIT_FAILURE;
+ rc = ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
+ close(fd);
+ if (rc != CDS_DISC_OK)
+ return EXIT_SUCCESS;
+ pb_log("no... waiting\n");
+ detach_and_sleep(REMOVABLE_SLEEP_DELAY);
+ }
+
+ /* Fall back to bare open() */
+ for (;;) {
+ pb_log("poll for non-optical drive removal ...\n");
+ fd = open(dev_path, O_RDONLY);
+ if (fd < 0 && errno != ENOMEDIUM)
+ return EXIT_FAILURE;
+ close(fd);
+ if (fd < 0)
+ return EXIT_SUCCESS;
+ pb_log("no... waiting\n");
+ detach_and_sleep(REMOVABLE_SLEEP_DELAY);
+ }
+}
+
+static int poll_removable_device(const char *sysfs_path,
+ const char *dev_path)
+{
+ int rc, mounted, optical = -1;
+
+ for (;;) {
+ rc = poll_device_plug(dev_path, &optical);
+ if (rc == EXIT_FAILURE)
+ return rc;
+ rc = found_new_device(dev_path);
+ mounted = (rc == EXIT_SUCCESS);
+
+ poll_device_unplug(dev_path, optical);
+
+ remove_device(dev_path);
+
+ /* Unmount it repeatedly, if needs be */
+ while (mounted && !unmount_device(dev_path))
+ ;
+ detach_and_sleep(1);
+ }
+}
+
int main(int argc, char **argv)
{
- char mountpoint[PATH_MAX];
char *dev_path, *action;
int rc;
- /*if (fork())
- return EXIT_SUCCESS;
- */
action = getenv("ACTION");
- logf = stdout;
+ logf = fopen("/var/log/petitboot-udev-helpers.log", "a");
+ if (!logf)
+ logf = stdout;
+ pb_log("%d started\n", getpid());
rc = EXIT_SUCCESS;
if (!action) {
- log("missing environment?\n");
+ pb_log("missing environment?\n");
return EXIT_FAILURE;
}
+ set_mount_base(TMP_DIR);
+
if (connect_to_socket())
return EXIT_FAILURE;
if (streq(action, "fake")) {
- log("fake mode");
+ pb_log("fake mode");
add_device(&fake_boot_devices[0]);
add_boot_option(&fake_boot_options[0]);
dev_path = getenv("DEVNAME");
if (!dev_path) {
- log("missing environment?\n");
+ pb_log("missing environment?\n");
return EXIT_FAILURE;
}
- if (streq(action, "add")) {
- if (mount_device(dev_path, mountpoint)) {
- log("failed to mount %s\n", dev_path);
- return EXIT_FAILURE;
- }
-
- log("mounted %s at %s\n", dev_path, mountpoint);
-
- iterate_parsers(dev_path, mountpoint);
+ if (is_ignored_device(dev_path))
+ return EXIT_SUCCESS;
+ if (streq(action, "add")) {
+ char *sysfs_path = getenv("DEVPATH");
+ if (sysfs_path && is_removable_device(sysfs_path))
+ rc = poll_removable_device(sysfs_path, dev_path);
+ else
+ rc = found_new_device(dev_path);
} else if (streq(action, "remove")) {
- log("%s removed\n", dev_path);
+ pb_log("%s removed\n", dev_path);
remove_device(dev_path);
;
} else {
- log("invalid action '%s'\n", action);
+ pb_log("invalid action '%s'\n", action);
rc = EXIT_FAILURE;
}
return rc;
projects / petitboot / blobdiff