X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=udev_start.c;h=dcb429334501648c68776c54e68a73d9bf698d90;hp=1a86163cd557e980f1bbadab575aab043381744e;hb=f22e9686fd4f8e602e8dc11a4b06765206f26edf;hpb=7757db1f859616171693ed9a54d1d16d3d5ed8e9 diff --git a/udev_start.c b/udev_start.c index 1a86163cd..dcb429334 100644 --- a/udev_start.c +++ b/udev_start.c @@ -30,6 +30,7 @@ #include #include #include +#include #include #include @@ -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; @@ -87,25 +88,27 @@ 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"); return -ENODEV; } - udev_set_values(&udev, devpath, subsystem, "add"); + udev_init_device(&udev, devpath, subsystem); udev_add_device(&udev, class_dev); /* run dev.d/ scripts if we created a node or changed a netif name */ @@ -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); }