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Diffstat (limited to 'udev_start.c')
-rw-r--r--udev_start.c143
1 files changed, 67 insertions, 76 deletions
diff --git a/udev_start.c b/udev_start.c
index 8c7a06b5af..dcb4293345 100644
--- a/udev_start.c
+++ b/udev_start.c
@@ -30,6 +30,7 @@
#include <ctype.h>
#include <dirent.h>
#include <sys/wait.h>
+#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
@@ -40,22 +41,22 @@
#include "udev.h"
-#define MAX_PATHLEN 1024
-#define SYSBLOCK "/sys/block"
-#define SYSCLASS "/sys/class"
+#define MAX_PATH_SIZE 512
struct device {
struct list_head list;
- char path[MAX_PATHLEN];
- char subsys[MAX_PATHLEN];
+ char path[MAX_PATH_SIZE];
+ char subsys[MAX_PATH_SIZE];
};
/* sort files in lexical order */
-static int device_list_insert(char *path, char *subsystem, struct list_head *device_list)
+static int device_list_insert(const char *path, char *subsystem, struct list_head *device_list)
{
struct device *loop_device;
struct device *new_device;
+ dbg("insert: '%s'\n", path);
+
list_for_each_entry(loop_device, device_list, list) {
if (strcmp(loop_device->path, path) > 0) {
break;
@@ -87,18 +88,20 @@ static char *first_list[] = {
NULL,
};
-static int add_device(char *devpath, char *subsystem)
+static int add_device(const char *path, const char *subsystem)
{
struct udevice udev;
- char path[SYSFS_PATH_MAX];
struct sysfs_class_device *class_dev;
+ const char *devpath;
+
+ devpath = &path[strlen(sysfs_path)];
/* set environment for callouts and dev.d/ */
setenv("DEVPATH", devpath, 1);
setenv("SUBSYSTEM", subsystem, 1);
- snprintf(path, SYSFS_PATH_MAX, "%s%s", sysfs_path, devpath);
- path[SYSFS_PATH_MAX-1] = '\0';
+ dbg("exec : '%s' (%s)\n", devpath, path);
+
class_dev = sysfs_open_class_device_path(path);
if (class_dev == NULL) {
dbg ("sysfs_open_class_device_path failed");
@@ -127,7 +130,7 @@ static void exec_list(struct list_head *device_list)
/* handle the "first" type devices first */
list_for_each_entry_safe(loop_device, tmp_device, device_list, list) {
- for (i=0; first_list[i] != NULL; i++) {
+ for (i = 0; first_list[i] != NULL; i++) {
if (strncmp(loop_device->path, first_list[i], strlen(first_list[i])) == 0) {
add_device(loop_device->path, loop_device->subsys);
list_del(&loop_device->list);
@@ -140,7 +143,7 @@ static void exec_list(struct list_head *device_list)
/* handle the devices we are allowed to, excluding the "last" type devices */
list_for_each_entry_safe(loop_device, tmp_device, device_list, list) {
int found = 0;
- for (i=0; last_list[i] != NULL; i++) {
+ for (i = 0; last_list[i] != NULL; i++) {
if (strncmp(loop_device->path, last_list[i], strlen(last_list[i])) == 0) {
found = 1;
break;
@@ -162,56 +165,61 @@ static void exec_list(struct list_head *device_list)
}
}
+static int has_devt(const char *directory)
+{
+ char filename[MAX_PATH_SIZE];
+ struct stat statbuf;
+
+ snprintf(filename, MAX_PATH_SIZE, "%s/dev", directory);
+ filename[MAX_PATH_SIZE-1] = '\0';
+
+ if (stat(filename, &statbuf) == 0)
+ return 1;
+
+ return 0;
+}
+
static void udev_scan_block(void)
{
+ char base[MAX_PATH_SIZE];
DIR *dir;
struct dirent *dent;
LIST_HEAD(device_list);
- dir = opendir(SYSBLOCK);
+ snprintf(base, MAX_PATH_SIZE, "%s/block", sysfs_path);
+ base[MAX_PATH_SIZE-1] = '\0';
+
+ dir = opendir(base);
if (dir != NULL) {
for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
- char dirname[MAX_PATHLEN];
+ char dirname[MAX_PATH_SIZE];
DIR *dir2;
struct dirent *dent2;
- if ((strcmp(dent->d_name, ".") == 0) ||
- (strcmp(dent->d_name, "..") == 0))
+ if (dent->d_name[0] == '.')
continue;
- snprintf(dirname, MAX_PATHLEN, "/block/%s", dent->d_name);
- dirname[MAX_PATHLEN-1] = '\0';
- device_list_insert(dirname, "block", &device_list);
+ snprintf(dirname, MAX_PATH_SIZE, "%s/%s", base, dent->d_name);
+ dirname[MAX_PATH_SIZE-1] = '\0';
+ if (has_devt(dirname))
+ device_list_insert(dirname, "block", &device_list);
+ else
+ continue;
- snprintf(dirname, MAX_PATHLEN, "%s/%s", SYSBLOCK, dent->d_name);
+ snprintf(dirname, MAX_PATH_SIZE, "%s/%s", base, dent->d_name);
dir2 = opendir(dirname);
if (dir2 != NULL) {
for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) {
- char dirname2[MAX_PATHLEN];
- DIR *dir3;
- struct dirent *dent3;
+ char dirname2[MAX_PATH_SIZE];
- if ((strcmp(dent2->d_name, ".") == 0) ||
- (strcmp(dent2->d_name, "..") == 0))
+ if (dent2->d_name[0] == '.')
continue;
- snprintf(dirname2, MAX_PATHLEN, "%s/%s", dirname, dent2->d_name);
- dirname2[MAX_PATHLEN-1] = '\0';
-
- dir3 = opendir(dirname2);
- if (dir3 != NULL) {
- for (dent3 = readdir(dir3); dent3 != NULL; dent3 = readdir(dir3)) {
- char filename[MAX_PATHLEN];
-
- if (strcmp(dent3->d_name, "dev") == 0) {
- snprintf(filename, MAX_PATHLEN, "/block/%s/%s",
- dent->d_name, dent2->d_name);
- filename[MAX_PATHLEN-1] = '\0';
- device_list_insert(filename, "block", &device_list);
- }
- }
- closedir(dir3);
- }
+ snprintf(dirname2, MAX_PATH_SIZE, "%s/%s", dirname, dent2->d_name);
+ dirname2[MAX_PATH_SIZE-1] = '\0';
+
+ if (has_devt(dirname2))
+ device_list_insert(dirname2, "block", &device_list);
}
closedir(dir2);
}
@@ -224,59 +232,42 @@ static void udev_scan_block(void)
static void udev_scan_class(void)
{
+ char base[MAX_PATH_SIZE];
DIR *dir;
struct dirent *dent;
LIST_HEAD(device_list);
- dir = opendir(SYSCLASS);
+ snprintf(base, MAX_PATH_SIZE, "%s/class", sysfs_path);
+ base[MAX_PATH_SIZE-1] = '\0';
+
+ dir = opendir(base);
if (dir != NULL) {
for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
- char dirname[MAX_PATHLEN];
+ char dirname[MAX_PATH_SIZE];
DIR *dir2;
struct dirent *dent2;
- if ((strcmp(dent->d_name, ".") == 0) ||
- (strcmp(dent->d_name, "..") == 0))
+ if (dent->d_name[0] == '.')
continue;
- snprintf(dirname, MAX_PATHLEN, "%s/%s", SYSCLASS, dent->d_name);
- dirname[MAX_PATHLEN-1] = '\0';
+ snprintf(dirname, MAX_PATH_SIZE, "%s/%s", base, dent->d_name);
+ dirname[MAX_PATH_SIZE-1] = '\0';
dir2 = opendir(dirname);
if (dir2 != NULL) {
for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) {
- char dirname2[MAX_PATHLEN];
- DIR *dir3;
- struct dirent *dent3;
+ char dirname2[MAX_PATH_SIZE];
- if ((strcmp(dent2->d_name, ".") == 0) ||
- (strcmp(dent2->d_name, "..") == 0))
+ if (dent2->d_name[0] == '.')
continue;
+ snprintf(dirname2, MAX_PATH_SIZE, "%s/%s", dirname, dent2->d_name);
+ dirname2[MAX_PATH_SIZE-1] = '\0';
+
/* pass the net class as it is */
- if (strcmp(dent->d_name, "net") == 0) {
- snprintf(dirname2, MAX_PATHLEN, "/class/net/%s", dent2->d_name);
+ if (strcmp(dent->d_name, "net") == 0)
device_list_insert(dirname2, "net", &device_list);
- continue;
- }
-
- snprintf(dirname2, MAX_PATHLEN, "%s/%s", dirname, dent2->d_name);
- dirname2[MAX_PATHLEN-1] = '\0';
- dir3 = opendir(dirname2);
- if (dir3 != NULL) {
- for (dent3 = readdir(dir3); dent3 != NULL; dent3 = readdir(dir3)) {
- char filename[MAX_PATHLEN];
-
- /* pass devices with a "dev" file */
- if (strcmp(dent3->d_name, "dev") == 0) {
- snprintf(filename, MAX_PATHLEN, "/class/%s/%s",
- dent->d_name, dent2->d_name);
- filename[MAX_PATHLEN-1] = '\0';
- device_list_insert(filename, dent->d_name, &device_list);
- break;
- }
- }
- closedir(dir3);
- }
+ else if (has_devt(dirname2))
+ device_list_insert(dirname2, dent->d_name, &device_list);
}
closedir(dir2);
}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-12-02 04:59:11 +0000