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author | John Crispin <john@openwrt.org> | 2013-06-21 16:52:56 +0000 |
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committer | John Crispin <john@openwrt.org> | 2013-06-21 16:52:56 +0000 |
commit | 08de6fcc12b413620cab4375d9a27b06e9c3ff93 (patch) | |
tree | 36515e2f4a17c3e60d176601e73f003fd48a5702 /package/hotplug2/src | |
parent | e3dcf2448fa1a8267831b1bd4e236e5f392f7ff9 (diff) | |
download | mtk-20170518-08de6fcc12b413620cab4375d9a27b06e9c3ff93.zip mtk-20170518-08de6fcc12b413620cab4375d9a27b06e9c3ff93.tar.gz mtk-20170518-08de6fcc12b413620cab4375d9a27b06e9c3ff93.tar.bz2 |
hotplug2: procd does the hotplugging now
Signed-off-by: John Crispin <blogic@openwrt.org>
SVN-Revision: 36987
Diffstat (limited to 'package/hotplug2/src')
-rw-r--r-- | package/hotplug2/src/udevtrigger.c | 345 |
1 files changed, 0 insertions, 345 deletions
diff --git a/package/hotplug2/src/udevtrigger.c b/package/hotplug2/src/udevtrigger.c deleted file mode 100644 index 297e64c..0000000 --- a/package/hotplug2/src/udevtrigger.c +++ /dev/null @@ -1,345 +0,0 @@ -/* - * Copyright (C) 2004-2006 Kay Sievers <kay@vrfy.org> - * Copyright (C) 2006 Hannes Reinecke <hare@suse.de> - * - * 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 <stdlib.h> -#include <stddef.h> -#include <stdarg.h> -#include <string.h> -#include <stdio.h> -#include <unistd.h> -#include <getopt.h> -#include <errno.h> -#include <dirent.h> -#include <fcntl.h> -#include <syslog.h> -#include <sys/stat.h> -#include <sys/types.h> - -#define PATH_SIZE 512 - -static int verbose; -static int dry_run; - -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 int device_list_insert(const char *path) -{ - char filename[PATH_SIZE]; - char devpath[PATH_SIZE]; - struct stat statbuf; - - dbg("add '%s'" , path); - - /* we only have a device, if we have an uevent file */ - strlcpy(filename, path, sizeof(filename)); - strlcat(filename, "/uevent", sizeof(filename)); - if (stat(filename, &statbuf) < 0) - return -1; - if (!(statbuf.st_mode & 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_subsystem(const char *subsys) -{ - char base[PATH_SIZE]; - DIR *dir; - struct dirent *dent; - - strlcpy(base, "/sys/", sizeof(base)); - strlcat(base, subsys, sizeof(base)); - - dir = opendir(base); - if (dir != NULL) { - for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { - char dirname[PATH_SIZE]; - DIR *dir2; - struct dirent *dent2; - - if (dent->d_name[0] == '.') - continue; - - strlcpy(dirname, base, sizeof(dirname)); - strlcat(dirname, "/", sizeof(dirname)); - strlcat(dirname, dent->d_name, sizeof(dirname)); - strlcat(dirname, "/devices", sizeof(dirname)); - - /* look for devices */ - dir2 = opendir(dirname); - if (dir2 != NULL) { - for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) { - char dirname2[PATH_SIZE]; - - if (dent2->d_name[0] == '.') - continue; - - strlcpy(dirname2, dirname, sizeof(dirname2)); - strlcat(dirname2, "/", sizeof(dirname2)); - strlcat(dirname2, dent2->d_name, sizeof(dirname2)); - device_list_insert(dirname2); - } - closedir(dir2); - } - } - closedir(dir); - } -} - -static void scan_block(void) -{ - char base[PATH_SIZE]; - DIR *dir; - struct dirent *dent; - - strlcpy(base, "/sys/block", sizeof(base)); - - dir = opendir(base); - if (dir != NULL) { - for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { - char dirname[PATH_SIZE]; - DIR *dir2; - struct dirent *dent2; - - if (dent->d_name[0] == '.') - continue; - - strlcpy(dirname, base, sizeof(dirname)); - strlcat(dirname, "/", sizeof(dirname)); - strlcat(dirname, dent->d_name, sizeof(dirname)); - if (device_list_insert(dirname) != 0) - continue; - - /* look for partitions */ - dir2 = opendir(dirname); - if (dir2 != NULL) { - for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) { - char dirname2[PATH_SIZE]; - - if (dent2->d_name[0] == '.') - continue; - - if (!strcmp(dent2->d_name,"device")) - continue; - - strlcpy(dirname2, dirname, sizeof(dirname2)); - strlcat(dirname2, "/", sizeof(dirname2)); - strlcat(dirname2, dent2->d_name, sizeof(dirname2)); - device_list_insert(dirname2); - } - closedir(dir2); - } - } - closedir(dir); - } -} - -static void scan_class(void) -{ - char base[PATH_SIZE]; - DIR *dir; - struct dirent *dent; - - strlcpy(base, "/sys/class", sizeof(base)); - - dir = opendir(base); - if (dir != NULL) { - for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { - char dirname[PATH_SIZE]; - DIR *dir2; - struct dirent *dent2; - - if (dent->d_name[0] == '.') - continue; - - strlcpy(dirname, base, sizeof(dirname)); - strlcat(dirname, "/", sizeof(dirname)); - strlcat(dirname, dent->d_name, sizeof(dirname)); - dir2 = opendir(dirname); - if (dir2 != NULL) { - for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) { - char dirname2[PATH_SIZE]; - - if (dent2->d_name[0] == '.') - continue; - - if (!strcmp(dent2->d_name, "device")) - continue; - - strlcpy(dirname2, dirname, sizeof(dirname2)); - strlcat(dirname2, "/", sizeof(dirname2)); - strlcat(dirname2, dent2->d_name, sizeof(dirname2)); - device_list_insert(dirname2); - } - closedir(dir2); - } - } - closedir(dir); - } -} - -int main(int argc, char *argv[], char *envp[]) -{ - char base[PATH_SIZE]; - struct stat statbuf; - int failed = 0; - 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_subsystem("bus"); - scan_class(); - - /* scan "block" if it isn't a "class" */ - strlcpy(base, "/sys/class/block", sizeof(base)); - if (stat(base, &statbuf) != 0) - scan_block(); - -exit: - - closelog(); - return 0; -} |