hotplug2: replace udevtrigger from the udev-106 source with a much smaller self-contained, stripped-down version
SVN-Revision: 25920master
parent
0ca2b7f92c
commit
504eda0da9
@ -0,0 +1,345 @@ |
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/*
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* Copyright (C) 2004-2006 Kay Sievers <kay@vrfy.org> |
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* Copyright (C) 2006 Hannes Reinecke <hare@suse.de> |
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* |
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* This program is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License as published by the |
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* Free Software Foundation version 2 of the License. |
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*
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* This program is distributed in the hope that it will be useful, but |
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* WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* General Public License for more details. |
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*
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* You should have received a copy of the GNU General Public License along |
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* with this program; if not, write to the Free Software Foundation, Inc., |
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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* |
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*/ |
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#include <stdlib.h> |
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#include <stddef.h> |
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#include <stdarg.h> |
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#include <string.h> |
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#include <stdio.h> |
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#include <unistd.h> |
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#include <getopt.h> |
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#include <errno.h> |
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#include <dirent.h> |
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#include <fcntl.h> |
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#include <syslog.h> |
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#include <sys/stat.h> |
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#include <sys/types.h> |
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#define PATH_SIZE 512 |
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static int verbose; |
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static int dry_run; |
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void log_message(int priority, const char *format, ...) |
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{ |
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va_list args; |
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va_start(args, format); |
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vsyslog(priority, format, args); |
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va_end(args); |
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} |
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#undef err |
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#define err(format, arg...) \ |
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do { \
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log_message(LOG_ERR ,"%s: " format ,__FUNCTION__ ,## arg); \
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} while (0) |
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#undef info |
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#define info(format, arg...) \ |
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do { \
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log_message(LOG_INFO ,"%s: " format ,__FUNCTION__ ,## arg); \
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} while (0) |
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#ifdef DEBUG |
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#undef dbg |
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#define dbg(format, arg...) \ |
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do { \
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log_message(LOG_DEBUG ,"%s: " format ,__FUNCTION__ ,## arg); \
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} while (0) |
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#else |
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#define dbg(...) do {} while(0) |
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#endif |
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static void trigger_uevent(const char *devpath) |
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{ |
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char filename[PATH_SIZE]; |
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int fd; |
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strlcpy(filename, "/sys", sizeof(filename)); |
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strlcat(filename, devpath, sizeof(filename)); |
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strlcat(filename, "/uevent", sizeof(filename)); |
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if (verbose) |
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printf("%s\n", devpath); |
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if (dry_run) |
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return; |
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fd = open(filename, O_WRONLY); |
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if (fd < 0) { |
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dbg("error on opening %s: %s\n", filename, strerror(errno)); |
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return; |
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} |
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if (write(fd, "add", 3) < 0) |
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info("error on triggering %s: %s\n", filename, strerror(errno)); |
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close(fd); |
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} |
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static int sysfs_resolve_link(char *devpath, size_t size) |
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{ |
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char link_path[PATH_SIZE]; |
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char link_target[PATH_SIZE]; |
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int len; |
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int i; |
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int back; |
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strlcpy(link_path, "/sys", sizeof(link_path)); |
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strlcat(link_path, devpath, sizeof(link_path)); |
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len = readlink(link_path, link_target, sizeof(link_target)); |
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if (len <= 0) |
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return -1; |
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link_target[len] = '\0'; |
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dbg("path link '%s' points to '%s'", devpath, link_target); |
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for (back = 0; strncmp(&link_target[back * 3], "../", 3) == 0; back++) |
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; |
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dbg("base '%s', tail '%s', back %i", devpath, &link_target[back * 3], back); |
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for (i = 0; i <= back; i++) { |
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char *pos = strrchr(devpath, '/'); |
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if (pos == NULL) |
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return -1; |
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pos[0] = '\0'; |
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} |
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dbg("after moving back '%s'", devpath); |
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strlcat(devpath, "/", size); |
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strlcat(devpath, &link_target[back * 3], size); |
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return 0; |
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} |
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static int device_list_insert(const char *path) |
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{ |
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char filename[PATH_SIZE]; |
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char devpath[PATH_SIZE]; |
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struct stat statbuf; |
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dbg("add '%s'" , path); |
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/* we only have a device, if we have an uevent file */ |
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strlcpy(filename, path, sizeof(filename)); |
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strlcat(filename, "/uevent", sizeof(filename)); |
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if (stat(filename, &statbuf) < 0) |
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return -1; |
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if (!(statbuf.st_mode & S_IWUSR)) |
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return -1; |
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strlcpy(devpath, &path[4], sizeof(devpath)); |
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/* resolve possible link to real target */ |
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if (lstat(path, &statbuf) < 0) |
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return -1; |
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if (S_ISLNK(statbuf.st_mode)) |
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if (sysfs_resolve_link(devpath, sizeof(devpath)) != 0) |
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return -1; |
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trigger_uevent(devpath); |
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return 0; |
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} |
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static void scan_subsystem(const char *subsys) |
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{ |
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char base[PATH_SIZE]; |
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DIR *dir; |
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struct dirent *dent; |
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strlcpy(base, "/sys/", sizeof(base)); |
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strlcat(base, subsys, sizeof(base)); |
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dir = opendir(base); |
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if (dir != NULL) { |
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for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { |
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char dirname[PATH_SIZE]; |
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DIR *dir2; |
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struct dirent *dent2; |
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if (dent->d_name[0] == '.') |
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continue; |
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strlcpy(dirname, base, sizeof(dirname)); |
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strlcat(dirname, "/", sizeof(dirname)); |
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strlcat(dirname, dent->d_name, sizeof(dirname)); |
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strlcat(dirname, "/devices", sizeof(dirname)); |
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/* look for devices */ |
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dir2 = opendir(dirname); |
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if (dir2 != NULL) { |
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for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) { |
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char dirname2[PATH_SIZE]; |
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if (dent2->d_name[0] == '.') |
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continue; |
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strlcpy(dirname2, dirname, sizeof(dirname2)); |
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strlcat(dirname2, "/", sizeof(dirname2)); |
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strlcat(dirname2, dent2->d_name, sizeof(dirname2)); |
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device_list_insert(dirname2); |
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} |
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closedir(dir2); |
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} |
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} |
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closedir(dir); |
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} |
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} |
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static void scan_block(void) |
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{ |
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char base[PATH_SIZE]; |
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DIR *dir; |
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struct dirent *dent; |
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strlcpy(base, "/sys/block", sizeof(base)); |
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dir = opendir(base); |
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if (dir != NULL) { |
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for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { |
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char dirname[PATH_SIZE]; |
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DIR *dir2; |
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struct dirent *dent2; |
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if (dent->d_name[0] == '.') |
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continue; |
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strlcpy(dirname, base, sizeof(dirname)); |
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strlcat(dirname, "/", sizeof(dirname)); |
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strlcat(dirname, dent->d_name, sizeof(dirname)); |
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if (device_list_insert(dirname) != 0) |
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continue; |
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/* look for partitions */ |
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dir2 = opendir(dirname); |
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if (dir2 != NULL) { |
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for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) { |
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char dirname2[PATH_SIZE]; |
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if (dent2->d_name[0] == '.') |
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continue; |
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if (!strcmp(dent2->d_name,"device")) |
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continue; |
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strlcpy(dirname2, dirname, sizeof(dirname2)); |
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strlcat(dirname2, "/", sizeof(dirname2)); |
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strlcat(dirname2, dent2->d_name, sizeof(dirname2)); |
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device_list_insert(dirname2); |
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} |
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closedir(dir2); |
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} |
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} |
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closedir(dir); |
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} |
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} |
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static void scan_class(void) |
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{ |
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char base[PATH_SIZE]; |
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DIR *dir; |
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struct dirent *dent; |
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strlcpy(base, "/sys/class", sizeof(base)); |
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dir = opendir(base); |
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if (dir != NULL) { |
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for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { |
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char dirname[PATH_SIZE]; |
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DIR *dir2; |
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struct dirent *dent2; |
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if (dent->d_name[0] == '.') |
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continue; |
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strlcpy(dirname, base, sizeof(dirname)); |
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strlcat(dirname, "/", sizeof(dirname)); |
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strlcat(dirname, dent->d_name, sizeof(dirname)); |
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dir2 = opendir(dirname); |
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if (dir2 != NULL) { |
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for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) { |
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char dirname2[PATH_SIZE]; |
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if (dent2->d_name[0] == '.') |
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continue; |
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if (!strcmp(dent2->d_name, "device")) |
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continue; |
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strlcpy(dirname2, dirname, sizeof(dirname2)); |
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strlcat(dirname2, "/", sizeof(dirname2)); |
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strlcat(dirname2, dent2->d_name, sizeof(dirname2)); |
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device_list_insert(dirname2); |
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} |
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closedir(dir2); |
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} |
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} |
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closedir(dir); |
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} |
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} |
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int main(int argc, char *argv[], char *envp[]) |
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{ |
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char base[PATH_SIZE]; |
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struct stat statbuf; |
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int failed = 0; |
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int option; |
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openlog("udevtrigger", LOG_PID | LOG_CONS, LOG_DAEMON); |
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while (1) { |
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option = getopt(argc, argv, "vnh"); |
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if (option == -1) |
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break; |
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switch (option) { |
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case 'v': |
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verbose = 1; |
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break; |
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case 'n': |
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dry_run = 1; |
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break; |
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case 'h': |
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printf("Usage: udevtrigger OPTIONS\n" |
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" -v print the list of devices while running\n" |
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" -n do not actually trigger the events\n" |
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" -h print this text\n" |
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"\n"); |
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goto exit; |
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default: |
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goto exit; |
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} |
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} |
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/* if we have /sys/subsystem, forget all the old stuff */ |
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scan_subsystem("bus"); |
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scan_class(); |
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/* scan "block" if it isn't a "class" */ |
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strlcpy(base, "/sys/class/block", sizeof(base)); |
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if (stat(base, &statbuf) != 0) |
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scan_block(); |
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exit: |
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closelog(); |
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return 0; |
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} |
@ -1,44 +0,0 @@ |
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#
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# Copyright (C) 2006-2008 OpenWrt.org
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#
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# This is free software, licensed under the GNU General Public License v2.
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# See /LICENSE for more information.
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#
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include $(TOPDIR)/rules.mk |
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PKG_NAME:=udevtrigger
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PKG_VERSION:=106
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PKG_RELEASE:=1
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PKG_SOURCE:=udev-$(PKG_VERSION).tar.bz2
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PKG_SOURCE_URL:=@KERNEL/linux/utils/kernel/hotplug/
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PKG_MD5SUM:=320ccd2d0f4540d10e021bafa14f8985
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PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)/udev-$(PKG_VERSION)
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include $(INCLUDE_DIR)/package.mk |
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define Package/udevtrigger |
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SECTION:=base
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CATEGORY:=Base system
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TITLE:=Small utility to request kernel devices events for coldplug
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URL:=http://www.kernel.org/pub/linux/utils/kernel/hotplug/udev.html
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MAINTAINER:=Geoff Levand <geoffrey.levand@am.sony.com>
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endef |
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define Build/Compile |
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$(MAKE) -C $(PKG_BUILD_DIR) \
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CROSS_COMPILE="$(TARGET_CROSS)" \
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STRIP="/bin/true" \
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DESTDIR="$(PKG_INSTALL_DIR)" \
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OPTFLAGS="$(TARGET_CFLAGS)" \
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udevtrigger
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endef |
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define Package/udevtrigger/install |
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$(INSTALL_DIR) $(1)/sbin
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$(INSTALL_BIN) $(PKG_BUILD_DIR)/udevtrigger $(1)/sbin/
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endef |
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$(eval $(call BuildPackage,udevtrigger)) |
@ -1,20 +0,0 @@ |
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--- a/Makefile
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+++ b/Makefile
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@@ -113,7 +113,7 @@ LD = $(CROSS_COMPILE)gcc
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AR = $(CROSS_COMPILE)ar
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RANLIB = $(CROSS_COMPILE)ranlib
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-CFLAGS = -g -Wall -pipe -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64
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+CFLAGS = -Wall -pipe -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64
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WARNINGS = -Wstrict-prototypes -Wsign-compare -Wshadow \
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-Wchar-subscripts -Wmissing-declarations -Wnested-externs \
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-Wpointer-arith -Wcast-align -Wsign-compare -Wmissing-prototypes
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@@ -130,7 +130,7 @@ endif
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# if DEBUG is enabled, then we do not strip
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ifeq ($(strip $(DEBUG)),true)
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- CFLAGS += -DDEBUG
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+ CFLAGS += -g -DDEBUG
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endif
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ifeq ($(strip $(USE_GCOV)),true)
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@ -1,10 +0,0 @@ |
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--- a/udevtrigger.c
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+++ b/udevtrigger.c
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@@ -446,7 +446,6 @@ int main(int argc, char *argv[], char *e
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};
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logging_init("udevtrigger");
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- udev_config_init();
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dbg("version %s", UDEV_VERSION);
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sysfs_init();
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