X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=udev%2Fudev-rules.c;h=092ddcdc25360cf30f2d591715736748ebec3533;hp=e6452a6fa4e0c4d49f8d62f22368cf1839b09481;hb=081be002eae9bc7fc03dbfd7b99b4d28a7c98f9d;hpb=bd75fddbcbc65799bd4a684b3b6f4f04bcd637d8 diff --git a/udev/udev-rules.c b/udev/udev-rules.c index e6452a6fa..092ddcdc2 100644 --- a/udev/udev-rules.c +++ b/udev/udev-rules.c @@ -1,5 +1,5 @@ /* - * Copyright (C) 2008 Kay Sievers + * Copyright (C) 2003-2009 Kay Sievers * Copyright (C) 2008 Alan Jenkins * * This program is free software: you can redistribute it and/or modify @@ -27,6 +27,7 @@ #include #include #include +#include #include "udev.h" @@ -105,6 +106,13 @@ enum string_glob_type { GL_SOMETHING, /* commonly used "?*" */ }; +enum string_subst_type { + SB_UNSET, + SB_NONE, + SB_FORMAT, + SB_SUBSYS, +}; + /* tokens of a rule are sorted/handled in this order */ enum token_type { TK_UNSET, @@ -156,7 +164,6 @@ enum token_type { TK_A_ATTR, /* val, attr */ TK_A_RUN, /* val, bool */ TK_A_GOTO, /* size_t */ - TK_A_LAST_RULE, TK_END, }; @@ -166,22 +173,24 @@ struct token { union { unsigned char type; /* same as in rule and key */ struct { - unsigned char type; - unsigned char flags; + enum token_type type:8; + unsigned int flags:8; unsigned short token_count; unsigned int label_off; unsigned short filename_off; unsigned short filename_line; } rule; struct { - unsigned char type; - unsigned char flags; - unsigned char op; - unsigned char glob; + enum token_type type:8; + enum operation_type op:8; + enum string_glob_type glob:8; + enum string_subst_type subst:4; + enum string_subst_type attrsubst:4; unsigned int value_off; union { unsigned int attr_off; - int ignore_error; + int devlink_unique; + int fail_on_error; unsigned int rule_goto; mode_t mode; uid_t uid; @@ -203,7 +212,7 @@ struct rule_tmp { unsigned int token_cur; }; -#ifdef DEBUG +#ifdef ENABLE_DEBUG static const char *operation_str(enum operation_type type) { static const char *operation_strs[] = { @@ -262,7 +271,7 @@ static const char *token_str(enum token_type type) [TK_M_PROGRAM] = "M PROGRAM", [TK_M_IMPORT_FILE] = "M IMPORT_FILE", [TK_M_IMPORT_PROG] = "M IMPORT_PROG", - [TK_M_IMPORT_PARENT] = "M MPORT_PARENT", + [TK_M_IMPORT_PARENT] = "M IMPORT_PARENT", [TK_M_RESULT] = "M RESULT", [TK_M_MAX] = "M MAX", @@ -286,7 +295,6 @@ static const char *token_str(enum token_type type) [TK_A_ATTR] = "A ATTR", [TK_A_RUN] = "A RUN", [TK_A_GOTO] = "A GOTO", - [TK_A_LAST_RULE] = "A LAST_RULE", [TK_END] = "END", }; @@ -352,7 +360,6 @@ static void dump_token(struct udev_rules *rules, struct token *token) case TK_A_IGNORE_DEVICE: case TK_A_STRING_ESCAPE_NONE: case TK_A_STRING_ESCAPE_REPLACE: - case TK_A_LAST_RULE: case TK_A_IGNORE_REMOVE: dbg(rules->udev, "%s\n", token_str(type)); break; @@ -413,7 +420,7 @@ static inline const char *operation_str(enum operation_type type) { return NULL; static inline const char *token_str(enum token_type type) { return NULL; } static inline void dump_token(struct udev_rules *rules, struct token *token) {} static inline void dump_rules(struct udev_rules *rules) {} -#endif /* DEBUG */ +#endif /* ENABLE_DEBUG */ static int add_new_string(struct udev_rules *rules, const char *str, size_t bytes) { @@ -710,8 +717,9 @@ static int import_property_from_string(struct udev_device *dev, char *line) struct udev_list_entry *entry; entry = udev_device_add_property(dev, key, val); - /* store in db */ - udev_list_entry_set_flag(entry, 1); + /* store in db, skip private keys */ + if (key[0] != '.') + udev_list_entry_set_flag(entry, 1); } return 0; } @@ -739,7 +747,7 @@ static int import_program_into_properties(struct udev_device *dev, const char *p char *line; envp = udev_device_get_properties_envp(dev); - if (util_run_program(udev, program, envp, result, sizeof(result), &reslen) != 0) + if (util_run_program(udev, program, envp, result, sizeof(result), &reslen, NULL) != 0) return -1; line = result; @@ -777,8 +785,9 @@ static int import_parent_into_properties(struct udev_device *dev, const char *fi dbg(udev, "import key '%s=%s'\n", key, val); entry = udev_device_add_property(dev, key, val); - /* store in db */ - udev_list_entry_set_flag(entry, 1); + /* store in db, skip private keys */ + if (key[0] != '.') + udev_list_entry_set_flag(entry, 1); } } return 0; @@ -804,6 +813,8 @@ static int wait_for_file(struct udev_device *dev, const char *file, int timeout) dbg(udev, "will wait %i sec for '%s'\n", timeout, file); while (--loop) { + const struct timespec duration = { 0, 1000 * 1000 * 1000 / WAIT_LOOP_PER_SECOND }; + /* lookup file */ if (stat(file, &stats) == 0) { info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1); @@ -815,7 +826,7 @@ static int wait_for_file(struct udev_device *dev, const char *file, int timeout) return -2; } info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND); - usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND); + nanosleep(&duration, NULL); } info(udev, "waiting for '%s' failed\n", file); return -1; @@ -865,7 +876,7 @@ static int get_key(struct udev *udev, char **line, char **key, enum operation_ty char *temp; linepos = *line; - if (linepos == NULL && linepos[0] == '\0') + if (linepos == NULL || linepos[0] == '\0') return -1; /* skip whitespace */ @@ -973,8 +984,7 @@ static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type, const char *value, const void *data) { struct token *token = &rule_tmp->token[rule_tmp->token_cur]; - const char *attr = data; - enum string_glob_type glob; + const char *attr = NULL; memset(token, 0x00, sizeof(struct token)); @@ -999,7 +1009,6 @@ static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type, case TK_A_GROUP: case TK_A_MODE: case TK_A_NAME: - case TK_A_DEVLINK: case TK_A_GOTO: token->key.value_off = add_string(rule_tmp->rules, value); break; @@ -1008,9 +1017,14 @@ static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type, case TK_M_ATTRS: case TK_A_ATTR: case TK_A_ENV: + attr = data; token->key.value_off = add_string(rule_tmp->rules, value); token->key.attr_off = add_string(rule_tmp->rules, attr); break; + case TK_A_DEVLINK: + token->key.value_off = add_string(rule_tmp->rules, value); + token->key.devlink_unique = *(int *)data; + break; case TK_M_TEST: token->key.value_off = add_string(rule_tmp->rules, value); if (data != NULL) @@ -1020,11 +1034,10 @@ static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type, case TK_A_STRING_ESCAPE_NONE: case TK_A_STRING_ESCAPE_REPLACE: case TK_A_IGNORE_REMOVE: - case TK_A_LAST_RULE: break; case TK_A_RUN: token->key.value_off = add_string(rule_tmp->rules, value); - token->key.ignore_error = *(int *)data; + token->key.fail_on_error = *(int *)data; break; case TK_A_INOTIFY_WATCH: case TK_A_NUM_FAKE_PART: @@ -1053,15 +1066,14 @@ static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type, return -1; } - glob = GL_PLAIN; if (value != NULL && type < TK_M_MAX) { /* check if we need to split or call fnmatch() while matching rules */ + enum string_glob_type glob; int has_split; int has_glob; has_split = (strchr(value, '|') != NULL); - has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL || - strchr(value, '[') != NULL || strchr(value, ']') != NULL); + has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL || strchr(value, '[') != NULL); if (has_split && has_glob) { glob = GL_SPLIT_GLOB; } else if (has_split) { @@ -1071,12 +1083,34 @@ static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type, glob = GL_SOMETHING; else glob = GL_GLOB; + } else { + glob = GL_PLAIN; } + token->key.glob = glob; + } + + if (value != NULL && type > TK_M_MAX) { + /* check if assigned value has substitution chars */ + if (value[0] == '[') + token->key.subst = SB_SUBSYS; + else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL) + token->key.subst = SB_FORMAT; + else + token->key.subst = SB_NONE; + } + + if (attr != NULL) { + /* check if property/attribut name has substitution chars */ + if (attr[0] == '[') + token->key.attrsubst = SB_SUBSYS; + else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL) + token->key.attrsubst = SB_FORMAT; + else + token->key.attrsubst = SB_NONE; } token->key.type = type; token->key.op = op; - token->key.glob = glob; rule_tmp->token_cur++; if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) { err(rule_tmp->rules->udev, "temporary rule array too small\n"); @@ -1093,7 +1127,7 @@ static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp) for (i = 0; i < rule_tmp->token_cur; i++) { enum token_type next_val = TK_UNSET; - unsigned int next_idx; + unsigned int next_idx = 0; unsigned int j; /* find smallest value */ @@ -1309,7 +1343,7 @@ static int add_rule(struct udev_rules *rules, char *line, /* allow programs in /lib/udev called without the path */ if (value[0] != '/') - util_strscpyl(file, sizeof(file), UDEV_PREFIX "/lib/udev/", value, NULL); + util_strscpyl(file, sizeof(file), LIBEXECDIR "/", value, NULL); else util_strscpy(file, sizeof(file), value); pos = strchr(file, ' '); @@ -1348,7 +1382,7 @@ static int add_rule(struct udev_rules *rules, char *line, int flag = 0; attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1); - if (attr != NULL && strstr(attr, "ignore_error")) + if (attr != NULL && strstr(attr, "fail_event_on_error")) flag = 1; rule_add_key(&rule_tmp, TK_A_RUN, op, value, &flag); continue; @@ -1375,6 +1409,9 @@ static int add_rule(struct udev_rules *rules, char *line, } else { if (value[0] == '\0') info(rules->udev, "name empty, node creation suppressed\n"); + else if (strcmp(value, "%k") == 0) + err(rules->udev, "NAME=\"%%k\" is superfluous and breaks " + "kernel supplied names, please remove it from %s:%u\n", filename, lineno); rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL); attr = get_key_attribute(rules->udev, key + sizeof("NAME")-1); if (attr != NULL) { @@ -1394,11 +1431,17 @@ static int add_rule(struct udev_rules *rules, char *line, continue; } - if (strcmp(key, "SYMLINK") == 0) { - if (op < OP_MATCH_MAX) + if (strncmp(key, "SYMLINK", sizeof("SYMLINK")-1) == 0) { + if (op < OP_MATCH_MAX) { rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL); - else - rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, NULL); + } else { + int flag = 0; + + attr = get_key_attribute(rules->udev, key + sizeof("SYMLINK")-1); + if (attr != NULL && strstr(attr, "unique") != NULL) + flag = 1; + rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, &flag); + } rule_tmp.rule.rule.flags = 1; continue; } @@ -1453,10 +1496,6 @@ static int add_rule(struct udev_rules *rules, char *line, if (strcmp(key, "OPTIONS") == 0) { const char *pos; - if (strstr(value, "last_rule") != NULL) { - dbg(rules->udev, "last rule to be applied\n"); - rule_add_key(&rule_tmp, TK_A_LAST_RULE, 0, NULL, NULL); - } if (strstr(value, "ignore_device") != NULL) { dbg(rules->udev, "device should be ignored\n"); rule_add_key(&rule_tmp, TK_A_IGNORE_DEVICE, 0, NULL, NULL); @@ -1477,7 +1516,7 @@ static int add_rule(struct udev_rules *rules, char *line, int tout = atoi(&pos[strlen("event_timeout=")]); rule_add_key(&rule_tmp, TK_A_EVENT_TIMEOUT, 0, NULL, &tout); - dbg(rules->udev, "event timout=%i\n", tout); + dbg(rules->udev, "event timeout=%i\n", tout); } pos = strstr(value, "string_escape="); if (pos != NULL) { @@ -1544,7 +1583,7 @@ static int parse_file(struct udev_rules *rules, const char *filename, unsigned s first_token = rules->token_cur; - while(fgets(line, sizeof(line), f) != NULL) { + while (fgets(line, sizeof(line), f) != NULL) { char *key; size_t len; @@ -1566,6 +1605,8 @@ static int parse_file(struct udev_rules *rules, const char *filename, unsigned s while (line[len-2] == '\\') { if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL) break; + if (strlen(&line[len-2]) < 2) + break; line_nr++; len = strlen(line); } @@ -1695,17 +1736,11 @@ struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names) /* read dynamic/temporary rules */ util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev), "/.udev/rules.d", NULL); - if (stat(filename, &statbuf) != 0) { - util_create_path(udev, filename); - udev_selinux_setfscreatecon(udev, filename, S_IFDIR|0755); - mkdir(filename, 0755); - udev_selinux_resetfscreatecon(udev); - } udev_list_init(&sort_list); add_matching_files(udev, &sort_list, filename, ".rules"); /* read default rules */ - add_matching_files(udev, &sort_list, UDEV_PREFIX "/lib/udev/rules.d", ".rules"); + add_matching_files(udev, &sort_list, LIBEXECDIR "/rules.d", ".rules"); /* sort all rules files by basename into list of files */ udev_list_entry_foreach_safe(sort_loop, sort_tmp, udev_list_get_entry(&sort_list)) { @@ -1764,7 +1799,7 @@ struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names) if (stat(filename, &statbuf) == 0 && statbuf.st_size > 0) parse_file(rules, filename, filename_off); else - info(udev, "can not read '%s'\n", filename); + err(udev, "can not read '%s'\n", filename); udev_list_entry_delete(file_loop); } @@ -1911,35 +1946,51 @@ static int match_key(struct udev_rules *rules, struct token *token, const char * static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur) { - const char *key_name = &rules->buf[cur->key.attr_off]; - const char *key_value = &rules->buf[cur->key.value_off]; - char value[UTIL_NAME_SIZE]; + const char *name; + char nbuf[UTIL_NAME_SIZE]; + const char *value; + char vbuf[UTIL_NAME_SIZE]; size_t len; - value[0] = '\0'; - if (key_name[0] == '[') { - char attr[UTIL_PATH_SIZE]; - - util_strscpy(attr, sizeof(attr), key_name); - util_resolve_subsys_kernel(event->udev, attr, value, sizeof(value), 1); - } - if (value[0] == '\0') { - const char *val; - - val = udev_device_get_sysattr_value(dev, key_name); - if (val == NULL) + name = &rules->buf[cur->key.attr_off]; + switch (cur->key.attrsubst) { + case SB_FORMAT: + udev_event_apply_format(event, name, nbuf, sizeof(nbuf)); + name = nbuf; + /* fall through */ + case SB_NONE: + value = udev_device_get_sysattr_value(dev, name); + if (value == NULL) + return -1; + break; + case SB_SUBSYS: + if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0) return -1; - util_strscpy(value, sizeof(value), val); + value = vbuf; + break; + default: + return -1; } - /* strip trailing whitespace of value, if not asked to match for it */ - len = strlen(key_value); - if (len > 0 && !isspace(key_value[len-1])) { - len = strlen(value); - while (len > 0 && isspace(value[--len])) - value[len] = '\0'; - dbg(rules->udev, "removed trailing whitespace from '%s'\n", value); + /* remove trailing whitespace, if not asked to match for it */ + len = strlen(value); + if (len > 0 && isspace(value[len-1])) { + const char *key_value; + size_t klen; + + key_value = &rules->buf[cur->key.value_off]; + klen = strlen(key_value); + if (klen > 0 && !isspace(key_value[klen-1])) { + if (value != vbuf) { + util_strscpy(vbuf, sizeof(vbuf), value); + value = vbuf; + } + while (len > 0 && isspace(vbuf[--len])) + vbuf[len] = '\0'; + dbg(rules->udev, "removed trailing whitespace from '%s'\n", value); + } } + return match_key(rules, cur, value); } @@ -2151,7 +2202,7 @@ int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event program, &rules->buf[rule->rule.filename_off], rule->rule.filename_line); - if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL) != 0) { + if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL, NULL) != 0) { if (cur->key.op != OP_NOMATCH) goto nomatch; } else { @@ -2329,8 +2380,9 @@ int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event udev_event_apply_format(event, value, temp_value, sizeof(temp_value)); entry = udev_device_add_property(event->dev, name, temp_value); - /* store in db */ - udev_list_entry_set_flag(entry, 1); + /* store in db, skip private keys */ + if (name[0] != '.') + udev_list_entry_set_flag(entry, 1); } else { udev_device_add_property(event->dev, name, NULL); } @@ -2389,26 +2441,22 @@ int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event while (isspace(pos[0])) pos++; next = strchr(pos, ' '); - while (next) { + while (next != NULL) { next[0] = '\0'; - info(event->udev, "LINK '%s' %s:%u\n", - pos, - &rules->buf[rule->rule.filename_off], - rule->rule.filename_line); + info(event->udev, "LINK '%s' %s:%u\n", pos, + &rules->buf[rule->rule.filename_off], rule->rule.filename_line); util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL); - udev_device_add_devlink(event->dev, filename); + udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique); while (isspace(next[1])) next++; pos = &next[1]; next = strchr(pos, ' '); } if (pos[0] != '\0') { - info(event->udev, "LINK '%s' %s:%u\n", - pos, - &rules->buf[rule->rule.filename_off], - rule->rule.filename_line); + info(event->udev, "LINK '%s' %s:%u\n", pos, + &rules->buf[rule->rule.filename_off], rule->rule.filename_line); util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL); - udev_device_add_devlink(event->dev, filename); + udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique); } } break; @@ -2455,7 +2503,7 @@ int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event rule->rule.filename_line); list_entry = udev_list_entry_add(event->udev, &event->run_list, &rules->buf[cur->key.value_off], NULL, 1, 0); - if (cur->key.ignore_error) + if (cur->key.fail_on_error) udev_list_entry_set_flag(list_entry, 1); break; } @@ -2464,7 +2512,6 @@ int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event break; cur = &rules->tokens[cur->key.rule_goto]; continue; - case TK_A_LAST_RULE: case TK_END: return 0;