* 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 version 2 of the License.
- *
*/
#ifndef _GNU_SOURCE
#include <unistd.h>
#include <fcntl.h>
#include <ctype.h>
+#include <string.h>
#include <errno.h>
#include <dirent.h>
#include <stdint.h>
-#include "../../logging.h"
-#include "../../udev_utils.h"
+#include "libudev.h"
+#include "libudev-private.h"
-#ifdef USE_LOG
-void log_message(int priority, const char *format, ...)
+static void log_fn(struct udev *udev, int priority,
+ const char *file, int line, const char *fn,
+ const char *format, va_list args)
{
- va_list args;
- static int udev_log = -1;
-
- if (udev_log == -1) {
- const char *value;
-
- value = getenv("UDEV_LOG");
- if (value)
- udev_log = log_priority(value);
- else
- udev_log = LOG_ERR;
- }
-
- if (priority > udev_log)
- return;
-
- va_start(args, format);
vsyslog(priority, format, args);
- va_end(args);
}
-#endif
int main(int argc, char *argv[])
{
+ struct udev *udev;
const char *node = NULL;
int i;
int export = 0;
int sysfs_fd;
DIR *dir = NULL;
int rc = 1;
- char *match = NULL;
+ char filename[UTIL_PATH_SIZE];
+ char match[UTIL_PATH_SIZE];
- logging_init("edd_id");
+ udev = udev_new();
+ if (udev == NULL)
+ goto exit;
+
+ udev_log_init("edd_id");
+ udev_set_log_fn(udev, log_fn);
for (i = 1 ; i < argc; i++) {
char *arg = argv[i];
} else
node = arg;
}
- if (!node) {
- err("no node specified");
+ if (node == NULL) {
+ err(udev, "no node specified\n");
fprintf(stderr, "no node specified\n");
goto exit;
}
/* check for kernel support */
- dir = opendir("/sys/firmware/edd");
- if (!dir) {
- info("no kernel EDD support");
+ util_strscpyl(filename, sizeof(filename), udev_get_sys_path(udev), "/firmware/edd", NULL);
+ dir = opendir(filename);
+ if (dir == NULL) {
+ info(udev, "no kernel EDD support\n");
fprintf(stderr, "no kernel EDD support\n");
rc = 2;
goto exit;
disk_fd = open(node, O_RDONLY);
if (disk_fd < 0) {
- info("unable to open '%s'", node);
+ info(udev, "unable to open '%s'\n", node);
fprintf(stderr, "unable to open '%s'\n", node);
rc = 3;
goto closedir;
/* check for valid MBR signature */
if (lseek(disk_fd, 510, SEEK_SET) < 0) {
- info("seek to MBR validity failed '%s'", node);
+ info(udev, "seek to MBR validity failed '%s'\n", node);
rc = 4;
goto close;
}
if (read(disk_fd, &mbr_valid, sizeof(mbr_valid)) != sizeof(mbr_valid)) {
- info("read MBR validity failed '%s'", node);
+ info(udev, "read MBR validity failed '%s'\n", node);
rc = 5;
goto close;
}
if (mbr_valid != 0xAA55) {
fprintf(stderr, "no valid MBR signature '%s'\n", node);
- info("no valid MBR signature '%s'", node);
+ info(udev, "no valid MBR signature '%s'\n", node);
rc=6;
goto close;
}
/* read EDD signature */
if (lseek(disk_fd, 440, SEEK_SET) < 0) {
- info("seek to signature failed '%s'", node);
+ info(udev, "seek to signature failed '%s'\n", node);
rc = 7;
goto close;
}
if (read(disk_fd, &disk_id, sizeof(disk_id)) != sizeof(disk_id)) {
- info("read signature failed '%s'", node);
+ info(udev, "read signature failed '%s'\n", node);
rc = 8;
goto close;
}
/* all zero is invalid */
- info("read id 0x%08x from '%s'", disk_id, node);
+ info(udev, "read id 0x%08x from '%s'\n", disk_id, node);
if (disk_id == 0) {
fprintf(stderr, "no EDD signature '%s'\n", node);
- info("'%s' signature is zero", node);
+ info(udev, "'%s' signature is zero\n", node);
rc = 9;
goto close;
}
/* lookup signature in sysfs to determine the name */
+ match[0] = '\0';
for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
- char file[PATH_SIZE];
char sysfs_id_buf[256];
uint32_t sysfs_id;
ssize_t size;
if (dent->d_name[0] == '.')
continue;
- snprintf(file, sizeof(file), "/sys/firmware/edd/%s/mbr_signature", dent->d_name);
- file[sizeof(file)-1] = '\0';
-
- sysfs_fd = open(file, O_RDONLY);
+ util_strscpyl(filename, sizeof(filename), dent->d_name, "/mbr_signature", NULL);
+ sysfs_fd = openat(dirfd(dir), filename, O_RDONLY);
if (sysfs_fd < 0) {
- info("unable to open sysfs '%s'", file);
+ info(udev, "unable to open sysfs '%s'\n", filename);
continue;
}
size = read(sysfs_fd, sysfs_id_buf, sizeof(sysfs_id_buf)-1);
close(sysfs_fd);
- if (size < 0) {
- info("read sysfs '%s' failed", file);
+ if (size <= 0) {
+ info(udev, "read sysfs '%s' failed\n", filename);
continue;
}
sysfs_id_buf[size] = '\0';
- info("read '%s' from '%s'", sysfs_id_buf, file);
-
+ info(udev, "read '%s' from '%s'\n", sysfs_id_buf, filename);
sysfs_id = strtoul(sysfs_id_buf, NULL, 16);
+
+ /* look for matching value, that appears only once */
if (disk_id == sysfs_id) {
- if (!match) {
- match = dent->d_name;
+ if (match[0] == '\0') {
+ /* store id */
+ util_strscpy(match, sizeof(match), dent->d_name);
} else {
- info("'%s' does not have a unique signature", node);
+ /* error, same signature for another device */
+ info(udev, "'%s' does not have a unique signature\n", node);
fprintf(stderr, "'%s' does not have a unique signature\n", node);
- rc=10;
+ rc = 10;
goto exit;
}
}
-
}
- if (export)
- printf("ID_EDD=%s\n", match);
- else
- printf("%s\n", match);
- rc = 0;
+ if (match[0] != '\0') {
+ if (export)
+ printf("ID_EDD=%s\n", match);
+ else
+ printf("%s\n", match);
+ rc = 0;
+ }
close:
close(disk_fd);
closedir:
closedir(dir);
exit:
- logging_close();
+ udev_unref(udev);
+ udev_log_close();
return rc;
}
~ianmdlvl / elogind.git / blobdiff