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Diffstat (limited to 'extras/udevinfo/udevinfo.c')
-rw-r--r--extras/udevinfo/udevinfo.c295
1 files changed, 280 insertions, 15 deletions
diff --git a/extras/udevinfo/udevinfo.c b/extras/udevinfo/udevinfo.c
index c5934be2d4..3f03901f49 100644
--- a/extras/udevinfo/udevinfo.c
+++ b/extras/udevinfo/udevinfo.c
@@ -23,21 +23,29 @@
#include <string.h>
#include <stdio.h>
#include <ctype.h>
+#include <stdarg.h>
+#include <unistd.h>
+#include <errno.h>
-#include "libsysfs.h"
+#include "../../udev.h"
+#include "../../udev_version.h"
+#include "../../logging.h"
+#include "../../udevdb.h"
+#include "../../libsysfs/libsysfs.h"
-# define VALUE_SIZE 200
+# define SYSFS_VALUE_MAX 200
char **main_argv;
+int main_argc;
char **main_envp;
-static int print_all_attributes(char *path)
+static int print_all_attributes(const char *path)
{
struct dlist *attributes;
struct sysfs_attribute *attr;
struct sysfs_directory *sysfs_dir;
- char value[VALUE_SIZE];
+ char value[SYSFS_VALUE_MAX];
int len;
int retval = 0;
@@ -53,7 +61,7 @@ static int print_all_attributes(char *path)
dlist_for_each_data(attributes, attr, struct sysfs_attribute) {
if (attr->value != NULL) {
- strncpy(value, attr->value, VALUE_SIZE);
+ strncpy(value, attr->value, SYSFS_VALUE_MAX);
len = strlen(value);
if (len == 0)
continue;
@@ -82,24 +90,38 @@ exit:
return retval;
}
-int main(int argc, char **argv, char **envp)
+/* callback for database dump */
+static int print_record(char *path, struct udevice *dev)
+{
+ printf("P: %s\n", path);
+ printf("N: %s\n", dev->name);
+ printf("M: %#o\n", dev->mode);
+ printf("S: %s\n", dev->symlink);
+ printf("O: %s\n", dev->owner);
+ printf("G: %s\n", dev->group);
+ printf("\n");
+ return 0;
+}
+
+enum query_type {
+ NONE,
+ NAME,
+ PATH,
+ SYMLINK,
+ MODE,
+ OWNER,
+ GROUP
+};
+
+static int print_device_chain(const char *path)
{
- main_argv = argv;
- main_envp = envp;
struct sysfs_class_device *class_dev;
struct sysfs_class_device *class_dev_parent;
struct sysfs_attribute *attr;
struct sysfs_device *sysfs_dev;
struct sysfs_device *sysfs_dev_parent;
- char *path;
int retval = 0;
- if (argc != 2) {
- printf("Usage: udevinfo <sysfs_device_path>\n");
- return -1;
- }
- path = argv[1];
-
/* get the class dev */
class_dev = sysfs_open_class_device_path(path);
if (class_dev == NULL) {
@@ -157,3 +179,246 @@ exit:
//sysfs_close_class_device(class_dev);
return retval;
}
+
+static int process_options(void)
+{
+ static const char short_options[] = "adn:p:q:rVh";
+ int option;
+ int retval = 1;
+ struct udevice dev;
+ int root = 0;
+ int attributes = 0;
+ enum query_type query = NONE;
+ char result[NAME_SIZE] = "";
+ char path[NAME_SIZE] = "";
+ char name[NAME_SIZE] = "";
+ char temp[NAME_SIZE];
+ char *pos;
+
+ /* get command line options */
+ while (1) {
+ option = getopt(main_argc, main_argv, short_options);
+ if (option == -1)
+ break;
+
+ dbg("option '%c'", option);
+ switch (option) {
+ case 'n':
+ dbg("udev name: %s\n", optarg);
+ strfieldcpy(name, optarg);
+ break;
+
+ case 'p':
+ dbg("udev path: %s\n", optarg);
+ strfieldcpy(path, optarg);
+ break;
+
+ case 'q':
+ dbg("udev query: %s\n", optarg);
+
+ if (strcmp(optarg, "name") == 0) {
+ query = NAME;
+ break;
+ }
+
+ if (strcmp(optarg, "symlink") == 0) {
+ query = SYMLINK;
+ break;
+ }
+
+ if (strcmp(optarg, "mode") == 0) {
+ query = MODE;
+ break;
+ }
+
+ if (strcmp(optarg, "owner") == 0) {
+ query = OWNER;
+ break;
+ }
+
+ if (strcmp(optarg, "group") == 0) {
+ query = GROUP;
+ break;
+ }
+
+ if (strcmp(optarg, "path") == 0) {
+ query = PATH;
+ break;
+ }
+
+ printf("unknown query type\n");
+ exit(1);
+
+ case 'r':
+ root = 1;
+ break;
+
+ case 'a':
+ attributes = 1;
+ break;
+
+ case 'd':
+ retval = udevdb_open_ro();
+ if (retval != 0) {
+ printf("unable to open udev database\n");
+ exit(2);
+ }
+ udevdb_call_foreach(print_record);
+ udevdb_exit();
+ exit(0);
+
+ case 'V':
+ printf("udev, version %s\n", UDEV_VERSION);
+ exit(0);
+
+ case 'h':
+ retval = 0;
+ case '?':
+ default:
+ goto help;
+ }
+ }
+
+ /* process options */
+ if (query != NONE) {
+ retval = udevdb_open_ro();
+ if (retval != 0) {
+ printf("unable to open udev database\n");
+ return -EACCES;
+ }
+
+ if (path[0] != '\0') {
+ /* remove sysfs_path if given */
+ if (strncmp(path, sysfs_path, strlen(sysfs_path)) == 0) {
+ pos = path + strlen(sysfs_path);
+ } else {
+ if (path[0] != '/') {
+ /* prepend '/' if missing */
+ strcat(temp, "/");
+ strncat(temp, path, sizeof(path));
+ pos = temp;
+ } else {
+ pos = path;
+ }
+ }
+ retval = udevdb_get_dev(pos, &dev);
+ if (retval != 0) {
+ printf("device not found in database\n");
+ goto exit;
+ }
+ goto print;
+ }
+
+ if (name[0] != '\0') {
+ /* remove udev_root if given */
+ if (strncmp(name, udev_root, strlen(udev_root)) == 0) {
+ pos = name + strlen(udev_root);
+ } else
+ pos = name;
+ retval = udevdb_get_dev_byname(pos, path, &dev);
+ if (retval != 0) {
+ printf("device not found in database\n");
+ goto exit;
+ }
+ goto print;
+ }
+
+ printf("query needs device path(-p) or node name(-n) specified\n");
+ goto exit;
+
+print:
+ switch(query) {
+ case NAME:
+ if (root)
+ strfieldcpy(result, udev_root);
+ strncat(result, dev.name, sizeof(result));
+ break;
+
+ case SYMLINK:
+ strfieldcpy(result, dev.symlink);
+ break;
+
+ case MODE:
+ sprintf(result, "%#o", dev.mode);
+ break;
+
+ case GROUP:
+ strfieldcpy(result, dev.group);
+ break;
+
+ case OWNER:
+ strfieldcpy(result, dev.owner);
+ break;
+
+ case PATH:
+ strfieldcpy(result, path);
+ break;
+
+ default:
+ goto exit;
+ }
+ printf("%s\n", result);
+
+exit:
+ udevdb_exit();
+ return retval;
+ }
+
+ if (attributes) {
+ if (path[0] == '\0') {
+ printf("attribute walk on device chain needs path(-p) specified\n");
+ return -EINVAL;
+ } else {
+ if (strncmp(path, sysfs_path, strlen(sysfs_path)) != 0) {
+ /* prepend sysfs mountpoint if not given */
+ strfieldcpy(temp, path);
+ strfieldcpy(path, sysfs_path);
+ strncat(path, temp, sizeof(path));
+ }
+ print_device_chain(path);
+ return 0;
+ }
+ }
+
+ if (root) {
+ printf("%s\n", udev_root);
+ return 0;
+ }
+
+help:
+ printf("Usage: [-anpqrdVh]\n"
+ " -q TYPE query database for the specified value:\n"
+ " 'name' name of device node\n"
+ " 'symlink' pointing to node\n"
+ " 'mode' permissions of node\n"
+ " 'owner' of node\n"
+ " 'group' of node\n"
+ " 'path' sysfs device path\n"
+ " -p PATH sysfs device path used for query or chain\n"
+ " -n NAME node name used for query\n"
+ "\n"
+ " -r print udev root\n"
+ " -a print all attributes along the chain of the device\n"
+ " -d dump whole database\n"
+ " -V print udev version\n"
+ " -h print this help text\n"
+ "\n");
+ return retval;
+}
+
+int main(int argc, char *argv[], char *envp[])
+{
+ int retval;
+
+ main_argv = argv;
+ main_argc = argc;
+ main_envp = envp;
+
+ /* initialize our configuration */
+ udev_init_config();
+
+ retval = process_options();
+ if (retval != 0)
+ exit(1);
+ exit(0);
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-22 19:35:07 +0000