X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=udevtrigger.c;h=9a1e82887bc22b345ea1aeb7068835464a24af97;hp=09ef60addbfffd048f073de0e5e127e694bc534b;hb=fc89fe7edf83af465c1835d8eb985e4298ad2417;hpb=3c2081fcb7e3c5483953aa8226112360fcb1aed7 diff --git a/udevtrigger.c b/udevtrigger.c index 09ef60add..9a1e82887 100644 --- a/udevtrigger.c +++ b/udevtrigger.c @@ -22,19 +22,18 @@ #include #include #include +#include #include #include #include #include +#include #include #include #include "udev.h" #include "udevd.h" -static int verbose; -static int dry_run; - #ifdef USE_LOG void log_message(int priority, const char *format, ...) { @@ -49,6 +48,9 @@ void log_message(int priority, const char *format, ...) } #endif +static int verbose; +static int dry_run; + /* list of devices that we should run last due to any one of a number of reasons */ static char *last_list[] = { "/class/block/md", @@ -69,6 +71,11 @@ LIST_HEAD(device_first_list); LIST_HEAD(device_default_list); LIST_HEAD(device_last_list); +LIST_HEAD(filter_subsytem_match_list); +LIST_HEAD(filter_subsytem_nomatch_list); +LIST_HEAD(filter_attr_match_list); +LIST_HEAD(filter_attr_nomatch_list); + static int device_list_insert(const char *path) { struct list_head *device_list = &device_default_list; @@ -164,6 +171,93 @@ static int is_device(const char *path) return 1; } +static int subsystem_filtered(const char *subsystem) +{ + struct name_entry *loop_name; + + /* skip devices matching the listed subsystems */ + list_for_each_entry(loop_name, &filter_subsytem_nomatch_list, node) + if (fnmatch(subsystem, loop_name->name, 0) == 0) + return 1; + + /* skip devices not matching the listed subsystems */ + if (!list_empty(&filter_subsytem_match_list)) { + list_for_each_entry(loop_name, &filter_subsytem_match_list, node) + if (fnmatch(subsystem, loop_name->name, 0) == 0) + return 0; + return 1; + } + + return 0; +} + +static int attr_match(const char *path, const char *attr_value) +{ + char attr[NAME_SIZE]; + char file[PATH_SIZE]; + char *match_value; + + strlcpy(attr, attr_value, sizeof(attr)); + + /* separate attr and match value */ + match_value = strchr(attr, '='); + if (match_value != NULL) { + match_value[0] = '\0'; + match_value = &match_value[1]; + } + + strlcpy(file, path, sizeof(file)); + strlcat(file, "/", sizeof(file)); + strlcat(file, attr, sizeof(file)); + + if (match_value != NULL) { + /* match file content */ + char value[NAME_SIZE]; + int fd; + ssize_t size; + + fd = open(file, O_RDONLY); + if (fd < 0) + return 0; + size = read(fd, value, sizeof(value)); + close(fd); + if (size < 0) + return 0; + value[size] = '\0'; + remove_trailing_chars(value, '\n'); + + /* match if attribute value matches */ + if (fnmatch(match_value, value, 0) == 0) + return 1; + } else { + /* match if attribute exists */ + struct stat statbuf; + + if (stat(file, &statbuf) == 0) + return 1; + } + return 0; +} + +static int attr_filtered(const char *path) +{ + struct name_entry *loop_name; + + /* skip devices matching the listed sysfs attributes */ + list_for_each_entry(loop_name, &filter_attr_nomatch_list, node) + if (attr_match(path, loop_name->name)) + return 1; + + /* skip devices not matching the listed sysfs attributes */ + if (!list_empty(&filter_attr_match_list)) { + list_for_each_entry(loop_name, &filter_attr_match_list, node) + if (attr_match(path, loop_name->name)) + return 0; + return 1; + } + return 0; +} + static void scan_bus(void) { char base[PATH_SIZE]; @@ -183,6 +277,9 @@ static void scan_bus(void) if (dent->d_name[0] == '.') continue; + if (subsystem_filtered(dent->d_name)) + continue; + strlcpy(dirname, base, sizeof(dirname)); strlcat(dirname, "/", sizeof(dirname)); strlcat(dirname, dent->d_name, sizeof(dirname)); @@ -200,7 +297,8 @@ static void scan_bus(void) strlcpy(dirname2, dirname, sizeof(dirname2)); strlcat(dirname2, "/", sizeof(dirname2)); strlcat(dirname2, dent2->d_name, sizeof(dirname2)); - + if (attr_filtered(dirname2)) + continue; if (is_device(dirname2)) device_list_insert(dirname2); } @@ -224,6 +322,9 @@ static void scan_block(void) if (stat(base, &statbuf) == 0) return; + if (subsystem_filtered("block")) + return; + strlcpy(base, sysfs_path, sizeof(base)); strlcat(base, "/block", sizeof(base)); @@ -240,6 +341,8 @@ static void scan_block(void) strlcpy(dirname, base, sizeof(dirname)); strlcat(dirname, "/", sizeof(dirname)); strlcat(dirname, dent->d_name, sizeof(dirname)); + if (attr_filtered(dirname)) + continue; if (is_device(dirname)) device_list_insert(dirname); else @@ -260,6 +363,8 @@ static void scan_block(void) strlcpy(dirname2, dirname, sizeof(dirname2)); strlcat(dirname2, "/", sizeof(dirname2)); strlcat(dirname2, dent2->d_name, sizeof(dirname2)); + if (attr_filtered(dirname2)) + continue; if (is_device(dirname2)) device_list_insert(dirname2); } @@ -289,6 +394,9 @@ static void scan_class(void) if (dent->d_name[0] == '.') continue; + if (subsystem_filtered(dent->d_name)) + continue; + strlcpy(dirname, base, sizeof(dirname)); strlcat(dirname, "/", sizeof(dirname)); strlcat(dirname, dent->d_name, sizeof(dirname)); @@ -306,6 +414,8 @@ static void scan_class(void) strlcpy(dirname2, dirname, sizeof(dirname2)); strlcat(dirname2, "/", sizeof(dirname2)); strlcat(dirname2, dent2->d_name, sizeof(dirname2)); + if (attr_filtered(dirname2)) + continue; if (is_device(dirname2)) device_list_insert(dirname2); } @@ -356,36 +466,73 @@ static void scan_failed(void) int main(int argc, char *argv[], char *envp[]) { - int i; int failed = 0; + int option; + int longindex; + struct option options[] = { + { "verbose", 0, NULL, 'v' }, + { "dry-run", 0, NULL, 'n' }, + { "retry-failed", 0, NULL, 'F' }, + { "help", 0, NULL, 'h' }, + { "subsystem-match", 1, NULL, 's' }, + { "subsystem-nomatch", 1, NULL, 'S' }, + { "attr-match", 1, NULL, 'a' }, + { "attr-nomatch", 1, NULL, 'A' }, + {} + }; logging_init("udevtrigger"); udev_config_init(); dbg("version %s", UDEV_VERSION); sysfs_init(); - for (i = 1 ; i < argc; i++) { - char *arg = argv[i]; + while (1) { + option = getopt_long(argc, argv, "vnFhs:S:a:A:", options, &longindex); + if (option == -1) + break; - if (strcmp(arg, "--verbose") == 0 || strcmp(arg, "-v") == 0) { + switch (option) { + case 'v': verbose = 1; - } else if (strcmp(arg, "--dry-run") == 0 || strcmp(arg, "-n") == 0) { + break; + case 'n': dry_run = 1; - } else if (strcmp(arg, "--retry-failed") == 0 || strcmp(arg, "-F") == 0) { + break; + case 'F': failed = 1; - } else if (strcmp(arg, "--help") == 0 || strcmp(arg, "-h") == 0) { - printf("Usage: udevtrigger [--help] [--verbose] [--dry-run] [--retry-failed]\n"); + break; + case 's': + name_list_add(&filter_subsytem_match_list, optarg, 0); + break; + case 'S': + name_list_add(&filter_subsytem_nomatch_list, optarg, 0); + break; + case 'a': + name_list_add(&filter_attr_match_list, optarg, 0); + break; + case 'A': + name_list_add(&filter_attr_nomatch_list, optarg, 0); + break; + case 'h': + printf("Usage: udevtrigger OPTIONS\n" + " --verbose print the list of devices which will be triggered\n" + " --dry-run do not actually trigger the event\n" + " --retry-failed trigger only the events which are failed during a previous run\n" + " --subsystem-match select only devices from the specified subystem\n" + " --subsystem-nomatch exclude devices from the specified subystem\n" + " --attr-match=]> select only devices with a matching sysfs attribute\n" + " --attr-nomatch=]> exclude devices with a matching sysfs attribute\n" + " --help print this text\n" + "\n"); + goto exit; + default: goto exit; - } else { - fprintf(stderr, "unrecognized option '%s'\n", arg); - err("unrecognized option '%s'\n", arg); } } if (failed) scan_failed(); else { - /* default action */ scan_bus(); scan_class(); scan_block(); @@ -393,6 +540,11 @@ int main(int argc, char *argv[], char *envp[]) exec_lists(); exit: + name_list_cleanup(&filter_subsytem_match_list); + name_list_cleanup(&filter_subsytem_nomatch_list); + name_list_cleanup(&filter_attr_match_list); + name_list_cleanup(&filter_attr_nomatch_list); + sysfs_cleanup(); logging_close(); return 0;