From 13590ca98ac2fd4939b683adbfdd63392b559f3f Mon Sep 17 00:00:00 2001 From: Matthias Schiffer Date: Sat, 28 Nov 2015 14:58:01 +0100 Subject: Strip down procd to the necessary code, update copyright --- plug/coldplug.c | 69 ------ plug/hotplug.c | 610 ----------------------------------------------------- plug/hotplug.h | 25 --- plug/udevtrigger.c | 264 ----------------------- 4 files changed, 968 deletions(-) delete mode 100644 plug/coldplug.c delete mode 100644 plug/hotplug.c delete mode 100644 plug/hotplug.h delete mode 100644 plug/udevtrigger.c (limited to 'plug') diff --git a/plug/coldplug.c b/plug/coldplug.c deleted file mode 100644 index 5fcb9a3..0000000 --- a/plug/coldplug.c +++ /dev/null @@ -1,69 +0,0 @@ -/* - * Copyright (C) 2013 Felix Fietkau - * Copyright (C) 2013 John Crispin - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 - * as published by the Free Software Foundation - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ - -#include -#include -#include - -#include - -#include "../procd.h" -#include "../libc-compat.h" - -#include "hotplug.h" - -static struct uloop_process udevtrigger; - -static void coldplug_complete(struct uloop_timeout *t) -{ - DEBUG(4, "Coldplug complete\n"); - hotplug_last_event(NULL); - procd_state_next(); -} - -static void udevtrigger_complete(struct uloop_process *proc, int ret) -{ - DEBUG(4, "Finished udevtrigger\n"); - hotplug_last_event(coldplug_complete); -} - -void procd_coldplug(void) -{ - char *argv[] = { "udevtrigger", NULL }; - unsigned int oldumask = umask(0); - - umount2("/dev/pts", MNT_DETACH); - umount2("/dev/", MNT_DETACH); - mount("tmpfs", "/dev", "tmpfs", MS_NOSUID, "mode=0755,size=512K"); - ignore(symlink("/tmp/shm", "/dev/shm")); - mkdir("/dev/pts", 0755); - umask(oldumask); - mount("devpts", "/dev/pts", "devpts", MS_NOEXEC | MS_NOSUID, 0); - udevtrigger.cb = udevtrigger_complete; - udevtrigger.pid = fork(); - if (!udevtrigger.pid) { - execvp(argv[0], argv); - ERROR("Failed to start coldplug\n"); - exit(-1); - } - - if (udevtrigger.pid <= 0) { - ERROR("Failed to start new coldplug instance\n"); - return; - } - - uloop_process_add(&udevtrigger); - - DEBUG(4, "Launched coldplug instance, pid=%d\n", (int) udevtrigger.pid); -} diff --git a/plug/hotplug.c b/plug/hotplug.c deleted file mode 100644 index b5ebd07..0000000 --- a/plug/hotplug.c +++ /dev/null @@ -1,610 +0,0 @@ -/* - * Copyright (C) 2013 Felix Fietkau - * Copyright (C) 2013 John Crispin - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 - * as published by the Free Software Foundation - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ - -#include -#include -#include - -#include -#include - -#include -#include -#include -#include - -#include -#include -#include -#include - -#include "../procd.h" - -#include "hotplug.h" - -#define HOTPLUG_WAIT 500 - -struct cmd_handler; -struct cmd_queue { - struct list_head list; - - struct blob_attr *msg; - struct blob_attr *data; - int timeout; - - void (*handler)(struct blob_attr *msg, struct blob_attr *data); - void (*start)(struct blob_attr *msg, struct blob_attr *data); - void (*complete)(struct blob_attr *msg, struct blob_attr *data, int ret); -}; - -struct button_timeout { - struct list_head list; - struct uloop_timeout timeout; - char *name; - int seen; - struct blob_attr *data; -}; - -static LIST_HEAD(cmd_queue); -static LIST_HEAD(button_timer); -static struct uloop_process queue_proc; -static struct uloop_timeout last_event; -static struct blob_buf b, button_buf; -static char *rule_file; -static struct blob_buf script; -static struct cmd_queue *current; - -static void queue_add(struct cmd_handler *h, struct blob_attr *msg, struct blob_attr *data); -static void handle_button_complete(struct blob_attr *msg, struct blob_attr *data, int ret); - -static void button_free(struct button_timeout *b) -{ - uloop_timeout_cancel(&b->timeout); - list_del(&b->list); - free(b->data); - free(b->name); - free(b); -} - -static void button_timeout_remove(char *button) -{ - struct button_timeout *b, *c; - - if (!list_empty(&button_timer)) list_for_each_entry_safe(b, c, &button_timer, list) { - if (!strcmp(b->name, button)) - button_free(b); - } -} - -static char *hotplug_msg_find_var(struct blob_attr *msg, const char *name) -{ - struct blob_attr *cur; - int rem; - - blobmsg_for_each_attr(cur, msg, rem) { - if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING) - continue; - - if (strcmp(blobmsg_name(cur), name) != 0) - continue; - - return blobmsg_data(cur); - } - - return NULL; -} - -static void mkdir_p(char *dir) -{ - char *l = strrchr(dir, '/'); - - if (l) { - *l = '\0'; - mkdir_p(dir); - *l = '/'; - mkdir(dir, 0755); - } -} - -static void handle_makedev(struct blob_attr *msg, struct blob_attr *data) -{ - unsigned int oldumask = umask(0); - static struct blobmsg_policy mkdev_policy[2] = { - { .type = BLOBMSG_TYPE_STRING }, - { .type = BLOBMSG_TYPE_STRING }, - }; - struct blob_attr *tb[2]; - char *minor = hotplug_msg_find_var(msg, "MINOR"); - char *major = hotplug_msg_find_var(msg, "MAJOR"); - char *subsystem = hotplug_msg_find_var(msg, "SUBSYSTEM"); - - blobmsg_parse_array(mkdev_policy, 2, tb, blobmsg_data(data), blobmsg_data_len(data)); - if (tb[0] && tb[1] && minor && major && subsystem) { - mode_t m = S_IFCHR; - char *d = strdup(blobmsg_get_string(tb[0])); - - d = dirname(d); - mkdir_p(d); - free(d); - - if (!strcmp(subsystem, "block")) - m = S_IFBLK; - mknod(blobmsg_get_string(tb[0]), - m | strtoul(blobmsg_data(tb[1]), NULL, 8), - makedev(atoi(major), atoi(minor))); - } - umask(oldumask); -} - -static void handle_rm(struct blob_attr *msg, struct blob_attr *data) -{ - static struct blobmsg_policy rm_policy = { - .type = BLOBMSG_TYPE_STRING, - }; - struct blob_attr *tb; - - blobmsg_parse_array(&rm_policy, 1, &tb, blobmsg_data(data), blobmsg_data_len(data)); - if (tb) - unlink(blobmsg_data(tb)); -} - -static void handle_exec(struct blob_attr *msg, struct blob_attr *data) -{ - char *argv[8]; - struct blob_attr *cur; - int rem, fd; - int i = 0; - - blobmsg_for_each_attr(cur, msg, rem) - setenv(blobmsg_name(cur), blobmsg_data(cur), 1); - - blobmsg_for_each_attr(cur, data, rem) { - argv[i] = blobmsg_data(cur); - i++; - if (i == 7) - break; - } - - if (debug < 3) { - fd = open("/dev/null", O_RDWR); - if (fd > -1) { - dup2(fd, STDIN_FILENO); - dup2(fd, STDOUT_FILENO); - dup2(fd, STDERR_FILENO); - if (fd > STDERR_FILENO) - close(fd); - } - } - - if (i > 0) { - argv[i] = NULL; - execvp(argv[0], &argv[0]); - } - exit(-1); -} - -static void handle_button_start(struct blob_attr *msg, struct blob_attr *data) -{ - char *button = hotplug_msg_find_var(msg, "BUTTON"); - - if (button) - button_timeout_remove(button); -} - -static void handle_firmware(struct blob_attr *msg, struct blob_attr *data) -{ - char *dir = blobmsg_get_string(blobmsg_data(data)); - char *file = hotplug_msg_find_var(msg, "FIRMWARE"); - char *dev = hotplug_msg_find_var(msg, "DEVPATH"); - struct stat s = { 0 }; - char *path, loadpath[256], syspath[256]; - int fw, src, load, len; - static char buf[4096]; - - DEBUG(2, "Firmware request for %s/%s\n", dir, file); - - if (!file || !dir || !dev) { - ERROR("Request for unknown firmware %s/%s\n", dir, file); - exit(-1); - } - - path = alloca(strlen(dir) + strlen(file) + 2); - sprintf(path, "%s/%s", dir, file); - - if (stat(path, &s)) { - ERROR("Could not find firmware %s\n", path); - src = -1; - s.st_size = 0; - goto send_to_kernel; - } - - src = open(path, O_RDONLY); - if (src < 0) { - ERROR("Failed to open %s\n", path); - s.st_size = 0; - goto send_to_kernel; - } - -send_to_kernel: - snprintf(loadpath, sizeof(loadpath), "/sys/%s/loading", dev); - load = open(loadpath, O_WRONLY); - if (!load) { - ERROR("Failed to open %s\n", loadpath); - exit(-1); - } - if (write(load, "1", 1) == -1) { - ERROR("Failed to write to %s\n", loadpath); - exit(-1); - } - close(load); - - snprintf(syspath, sizeof(syspath), "/sys/%s/data", dev); - fw = open(syspath, O_WRONLY); - if (fw < 0) { - ERROR("Failed to open %s\n", syspath); - exit(-1); - } - - len = s.st_size; - while (len) { - len = read(src, buf, sizeof(buf)); - if (len <= 0) - break; - - if (write(fw, buf, len) == -1) { - ERROR("failed to write firmware file %s/%s to %s\n", dir, file, dev); - break; - } - } - - if (src >= 0) - close(src); - close(fw); - - load = open(loadpath, O_WRONLY); - if (write(load, "0", 1) == -1) - ERROR("failed to write to %s\n", loadpath); - close(load); - - DEBUG(2, "Done loading %s\n", path); - - exit(-1); -} - -enum { - HANDLER_MKDEV = 0, - HANDLER_RM, - HANDLER_EXEC, - HANDLER_BUTTON, - HANDLER_FW, -}; - -static struct cmd_handler { - char *name; - int atomic; - void (*handler)(struct blob_attr *msg, struct blob_attr *data); - void (*start)(struct blob_attr *msg, struct blob_attr *data); - void (*complete)(struct blob_attr *msg, struct blob_attr *data, int ret); -} handlers[] = { - [HANDLER_MKDEV] = { - .name = "makedev", - .atomic = 1, - .handler = handle_makedev, - }, - [HANDLER_RM] = { - .name = "rm", - .atomic = 1, - .handler = handle_rm, - }, - [HANDLER_EXEC] = { - .name = "exec", - .handler = handle_exec, - }, - [HANDLER_BUTTON] = { - .name = "button", - .handler = handle_exec, - .start = handle_button_start, - .complete = handle_button_complete, - }, - [HANDLER_FW] = { - .name = "load-firmware", - .handler = handle_firmware, - }, -}; - -static void queue_next(void) -{ - struct cmd_queue *c; - - if (queue_proc.pending || list_empty(&cmd_queue)) - return; - - c = list_first_entry(&cmd_queue, struct cmd_queue, list); - - queue_proc.pid = fork(); - if (!queue_proc.pid) { - uloop_done(); - c->handler(c->msg, c->data); - exit(0); - } - if (c->start) - c->start(c->msg, c->data); - list_del(&c->list); - if (c->complete) - current = c; - else - free(c); - if (queue_proc.pid <= 0) { - queue_next(); - return; - } - - uloop_process_add(&queue_proc); - - DEBUG(4, "Launched hotplug exec instance, pid=%d\n", (int) queue_proc.pid); -} - -static void queue_proc_cb(struct uloop_process *c, int ret) -{ - DEBUG(4, "Finished hotplug exec instance, pid=%d\n", (int) c->pid); - - if (current) { - current->complete(current->msg, current->data, ret); - free(current); - current = NULL; - } - queue_next(); -} - -static void queue_add(struct cmd_handler *h, struct blob_attr *msg, struct blob_attr *data) -{ - struct cmd_queue *c = NULL; - struct blob_attr *_msg, *_data; - - c = calloc_a(sizeof(struct cmd_queue), - &_msg, blob_pad_len(msg), - &_data, blob_pad_len(data), - NULL); - - c->msg = _msg; - c->data = _data; - - if (!c) - return; - - memcpy(c->msg, msg, blob_pad_len(msg)); - memcpy(c->data, data, blob_pad_len(data)); - c->handler = h->handler; - c->complete = h->complete; - c->start = h->start; - list_add_tail(&c->list, &cmd_queue); - queue_next(); -} - -static void handle_button_timeout(struct uloop_timeout *t) -{ - struct button_timeout *b; - char seen[16]; - - b = container_of(t, struct button_timeout, timeout); - blob_buf_init(&button_buf, 0); - blobmsg_add_string(&button_buf, "BUTTON", b->name); - blobmsg_add_string(&button_buf, "ACTION", "timeout"); - snprintf(seen, sizeof(seen), "%d", b->seen); - blobmsg_add_string(&button_buf, "SEEN", seen); - queue_add(&handlers[HANDLER_EXEC], button_buf.head, b->data); - button_free(b); -} - -static void handle_button_complete(struct blob_attr *msg, struct blob_attr *data, int ret) -{ - char *name = hotplug_msg_find_var(msg, "BUTTON"); - struct button_timeout *b; - int timeout = ret >> 8; - - if (!timeout) - return; - - b = malloc(sizeof(*b)); - if (!b || !name) - return; - - memset(b, 0, sizeof(*b)); - - b->data = malloc(blob_pad_len(data)); - b->name = strdup(name); - b->seen = timeout; - - memcpy(b->data, data, blob_pad_len(data)); - b->timeout.cb = handle_button_timeout; - - uloop_timeout_set(&b->timeout, timeout * 1000); - list_add(&b->list, &button_timer); -} - -static const char* rule_handle_var(struct json_script_ctx *ctx, const char *name, struct blob_attr *vars) -{ - const char *str, *sep; - - if (!strcmp(name, "DEVICENAME") || !strcmp(name, "DEVNAME")) { - str = json_script_find_var(ctx, vars, "DEVPATH"); - if (!str) - return NULL; - - sep = strrchr(str, '/'); - if (sep) - return sep + 1; - - return str; - } - - return NULL; -} - -static struct json_script_file * -rule_handle_file(struct json_script_ctx *ctx, const char *name) -{ - json_object *obj; - - obj = json_object_from_file((char*)name); - if (!obj) - return NULL; - - blob_buf_init(&script, 0); - blobmsg_add_json_element(&script, "", obj); - - return json_script_file_from_blobmsg(name, blob_data(script.head), blob_len(script.head)); -} - -static void rule_handle_command(struct json_script_ctx *ctx, const char *name, - struct blob_attr *data, struct blob_attr *vars) -{ - struct blob_attr *cur; - int rem, i; - - if (debug > 3) { - DEBUG(4, "Command: %s", name); - blobmsg_for_each_attr(cur, data, rem) - DEBUG(4, " %s", (char *) blobmsg_data(cur)); - DEBUG(4, "\n"); - - DEBUG(4, "Message:"); - blobmsg_for_each_attr(cur, vars, rem) - DEBUG(4, " %s=%s", blobmsg_name(cur), (char *) blobmsg_data(cur)); - DEBUG(4, "\n"); - } - - for (i = 0; i < ARRAY_SIZE(handlers); i++) - if (!strcmp(handlers[i].name, name)) { - if (handlers[i].atomic) - handlers[i].handler(vars, data); - else - queue_add(&handlers[i], vars, data); - break; - } - - if (last_event.cb) - uloop_timeout_set(&last_event, HOTPLUG_WAIT); -} - -static void rule_handle_error(struct json_script_ctx *ctx, const char *msg, - struct blob_attr *context) -{ - char *s; - - s = blobmsg_format_json(context, false); - ERROR("ERROR: %s in block: %s\n", msg, s); - free(s); -} - -static struct json_script_ctx jctx = { - .handle_var = rule_handle_var, - .handle_error = rule_handle_error, - .handle_command = rule_handle_command, - .handle_file = rule_handle_file, -}; - -static void hotplug_handler_debug(struct blob_attr *data) -{ - char *str; - - if (debug < 3) - return; - - str = blobmsg_format_json(data, true); - DEBUG(3, "%s\n", str); - free(str); -} - -static void hotplug_handler(struct uloop_fd *u, unsigned int ev) -{ - int i = 0; - static char buf[4096]; - int len = recv(u->fd, buf, sizeof(buf), MSG_DONTWAIT); - void *index; - if (len < 1) - return; - - blob_buf_init(&b, 0); - index = blobmsg_open_table(&b, NULL); - while (i < len) { - int l = strlen(buf + i) + 1; - char *e = strstr(&buf[i], "="); - - if (e) { - *e = '\0'; - blobmsg_add_string(&b, &buf[i], &e[1]); - } - i += l; - } - blobmsg_close_table(&b, index); - hotplug_handler_debug(b.head); - json_script_run(&jctx, rule_file, blob_data(b.head)); -} - -static struct uloop_fd hotplug_fd = { - .cb = hotplug_handler, -}; - -void hotplug_last_event(uloop_timeout_handler handler) -{ - last_event.cb = handler; - if (handler) - uloop_timeout_set(&last_event, HOTPLUG_WAIT); - else - uloop_timeout_cancel(&last_event); -} - -void hotplug(char *rules) -{ - struct sockaddr_nl nls; - int nlbufsize = 512 * 1024; - - rule_file = strdup(rules); - memset(&nls,0,sizeof(struct sockaddr_nl)); - nls.nl_family = AF_NETLINK; - nls.nl_pid = getpid(); - nls.nl_groups = -1; - - if ((hotplug_fd.fd = socket(PF_NETLINK, SOCK_DGRAM | SOCK_CLOEXEC, NETLINK_KOBJECT_UEVENT)) == -1) { - ERROR("Failed to open hotplug socket: %s\n", strerror(errno)); - exit(1); - } - if (bind(hotplug_fd.fd, (void *)&nls, sizeof(struct sockaddr_nl))) { - ERROR("Failed to bind hotplug socket: %s\n", strerror(errno)); - exit(1); - } - - if (setsockopt(hotplug_fd.fd, SOL_SOCKET, SO_RCVBUFFORCE, &nlbufsize, sizeof(nlbufsize))) - ERROR("Failed to resize receive buffer: %s\n", strerror(errno)); - - json_script_init(&jctx); - queue_proc.cb = queue_proc_cb; - uloop_fd_add(&hotplug_fd, ULOOP_READ); -} - -int hotplug_run(char *rules) -{ - uloop_init(); - hotplug(rules); - uloop_run(); - - return 0; -} - -void hotplug_shutdown(void) -{ - uloop_fd_delete(&hotplug_fd); - close(hotplug_fd.fd); -} diff --git a/plug/hotplug.h b/plug/hotplug.h deleted file mode 100644 index 2a44442..0000000 --- a/plug/hotplug.h +++ /dev/null @@ -1,25 +0,0 @@ -/* - * Copyright (C) 2013 Felix Fietkau - * Copyright (C) 2013 John Crispin - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 - * as published by the Free Software Foundation - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ - -#ifndef __PROCD_HOTPLUG_H -#define __PROCD_HOTPLUG_H - -#include - -void hotplug(char *rules); -int hotplug_run(char *rules); -void hotplug_shutdown(void); -void hotplug_last_event(uloop_timeout_handler handler); - -#endif diff --git a/plug/udevtrigger.c b/plug/udevtrigger.c deleted file mode 100644 index 5013189..0000000 --- a/plug/udevtrigger.c +++ /dev/null @@ -1,264 +0,0 @@ -/* - * Copyright (C) 2004-2006 Kay Sievers - * Copyright (C) 2006 Hannes Reinecke - * - * 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. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. - * - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#define PATH_SIZE 512 - -#ifndef strlcpy -#define strlcpy(d,s,l) (strncpy(d,s,l), (d)[(l)-1] = '\0') -#endif - -#ifndef strlcat -#define strlcat(d,s,l) strncat(d,s,(l)-strlen(d)-1) -#endif - -static int verbose; -static int dry_run; - -static void log_message(int priority, const char *format, ...) -{ - va_list args; - - va_start(args, format); - vsyslog(priority, format, args); - va_end(args); -} - -#undef err -#define err(format, arg...) \ - do { \ - log_message(LOG_ERR ,"%s: " format ,__FUNCTION__ ,## arg); \ - } while (0) - -#undef info -#define info(format, arg...) \ - do { \ - log_message(LOG_INFO ,"%s: " format ,__FUNCTION__ ,## arg); \ - } while (0) - -#ifdef DEBUG -#undef dbg -#define dbg(format, arg...) \ - do { \ - log_message(LOG_DEBUG ,"%s: " format ,__FUNCTION__ ,## arg); \ - } while (0) -#else -#define dbg(...) do {} while(0) -#endif - - -static void trigger_uevent(const char *devpath) -{ - char filename[PATH_SIZE]; - int fd; - - strlcpy(filename, "/sys", sizeof(filename)); - strlcat(filename, devpath, sizeof(filename)); - strlcat(filename, "/uevent", sizeof(filename)); - - if (verbose) - printf("%s\n", devpath); - - if (dry_run) - return; - - fd = open(filename, O_WRONLY); - if (fd < 0) { - dbg("error on opening %s: %s\n", filename, strerror(errno)); - return; - } - - if (write(fd, "add", 3) < 0) - info("error on triggering %s: %s\n", filename, strerror(errno)); - - close(fd); -} - -static int sysfs_resolve_link(char *devpath, size_t size) -{ - char link_path[PATH_SIZE]; - char link_target[PATH_SIZE]; - int len; - int i; - int back; - - strlcpy(link_path, "/sys", sizeof(link_path)); - strlcat(link_path, devpath, sizeof(link_path)); - len = readlink(link_path, link_target, sizeof(link_target)); - if (len <= 0) - return -1; - link_target[len] = '\0'; - dbg("path link '%s' points to '%s'", devpath, link_target); - - for (back = 0; strncmp(&link_target[back * 3], "../", 3) == 0; back++) - ; - dbg("base '%s', tail '%s', back %i", devpath, &link_target[back * 3], back); - for (i = 0; i <= back; i++) { - char *pos = strrchr(devpath, '/'); - - if (pos == NULL) - return -1; - pos[0] = '\0'; - } - dbg("after moving back '%s'", devpath); - strlcat(devpath, "/", size); - strlcat(devpath, &link_target[back * 3], size); - return 0; -} - -static bool device_has_attribute(const char *path, const char *attr, - mode_t mode) -{ - char filename[PATH_SIZE]; - struct stat statbuf; - - strlcpy(filename, path, sizeof(filename)); - strlcat(filename, attr, sizeof(filename)); - - if (stat(filename, &statbuf) < 0) - return false; - - if (!(statbuf.st_mode & mode)) - return false; - - return true; -} - -static int device_list_insert(const char *path) -{ - char devpath[PATH_SIZE]; - struct stat statbuf; - - dbg("add '%s'" , path); - - /* we only have a device, if we have a dev and an uevent file */ - if (!device_has_attribute(path, "/dev", S_IRUSR) || - !device_has_attribute(path, "/uevent", S_IWUSR)) - return -1; - - strlcpy(devpath, &path[4], sizeof(devpath)); - - /* resolve possible link to real target */ - if (lstat(path, &statbuf) < 0) - return -1; - if (S_ISLNK(statbuf.st_mode)) - if (sysfs_resolve_link(devpath, sizeof(devpath)) != 0) - return -1; - - trigger_uevent(devpath); - return 0; -} - -static void scan_subdir(const char *base, const char *subdir, - bool insert, int depth) -{ - DIR *dir; - struct dirent *dent; - - dir = opendir(base); - if (dir == NULL) - return; - - for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { - char dirname[PATH_SIZE]; - - if (dent->d_name[0] == '.') - continue; - - strlcpy(dirname, base, sizeof(dirname)); - strlcat(dirname, "/", sizeof(dirname)); - strlcat(dirname, dent->d_name, sizeof(dirname)); - - if (insert) { - int err; - - err = device_list_insert(dirname); - if (err) - continue; - } - - if (subdir) - strlcat(dirname, subdir, sizeof(base)); - - if (depth) - scan_subdir(dirname, NULL, true, depth - 1); - } - - closedir(dir); -} - -int main(int argc, char *argv[], char *envp[]) -{ - struct stat statbuf; - int option; - - openlog("udevtrigger", LOG_PID | LOG_CONS, LOG_DAEMON); - - while (1) { - option = getopt(argc, argv, "vnh"); - if (option == -1) - break; - - switch (option) { - case 'v': - verbose = 1; - break; - case 'n': - dry_run = 1; - break; - case 'h': - printf("Usage: udevtrigger OPTIONS\n" - " -v print the list of devices while running\n" - " -n do not actually trigger the events\n" - " -h print this text\n" - "\n"); - goto exit; - default: - goto exit; - } - } - - - /* if we have /sys/subsystem, forget all the old stuff */ - scan_subdir("/sys/bus", "/devices", false, 1); - scan_subdir("/sys/class", NULL, false, 1); - - /* scan "block" if it isn't a "class" */ - if (stat("/sys/class/block", &statbuf) != 0) - scan_subdir("/sys/block", NULL, true, 1); - -exit: - - closelog(); - return 0; -} -- cgit v1.2.3