X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fudev%2Fudev-rules.c;h=447a86864ea39688a75f9037041fd40a70334915;hp=6de7511c7d8c2b92628c54b27295ffee5822a915;hb=9f5ecdb0b11557be41c065f460bb22ab52bb0034;hpb=ec3281d3b681b002dfe1a4bea0532a504e37557a diff --git a/src/udev/udev-rules.c b/src/udev/udev-rules.c index 6de7511c7..447a86864 100644 --- a/src/udev/udev-rules.c +++ b/src/udev/udev-rules.c @@ -82,7 +82,7 @@ static unsigned int rules_add_string(struct udev_rules *rules, const char *s) { return strbuf_add_string(rules->strbuf, s, strlen(s)); } -/* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */ +/* KEY=="", KEY!="", KEY+="", KEY-="", KEY="", KEY:="" */ enum operation_type { OP_UNSET, @@ -91,6 +91,7 @@ enum operation_type { OP_MATCH_MAX, OP_ADD, + OP_REMOVE, OP_ASSIGN, OP_ASSIGN_FINAL, }; @@ -224,6 +225,7 @@ static const char *operation_str(enum operation_type type) { [OP_MATCH_MAX] = "MATCH_MAX", [OP_ADD] = "add", + [OP_REMOVE] = "remove", [OP_ASSIGN] = "assign", [OP_ASSIGN_FINAL] = "assign-final", } ; @@ -457,8 +459,9 @@ static int add_token(struct udev_rules *rules, struct token *token) { static uid_t add_uid(struct udev_rules *rules, const char *owner) { unsigned int i; - uid_t uid; + uid_t uid = 0; unsigned int off; + int r; /* lookup, if we know it already */ for (i = 0; i < rules->uids_cur; i++) { @@ -468,7 +471,13 @@ static uid_t add_uid(struct udev_rules *rules, const char *owner) { return uid; } } - uid = util_lookup_user(rules->udev, owner); + r = get_user_creds(&owner, &uid, NULL, NULL, NULL); + if (r < 0) { + if (r == -ENOENT || r == -ESRCH) + log_error("specified user '%s' unknown", owner); + else + log_error_errno(r, "error resolving user '%s': %m", owner); + } /* grow buffer if needed */ if (rules->uids_cur+1 >= rules->uids_max) { @@ -497,8 +506,9 @@ static uid_t add_uid(struct udev_rules *rules, const char *owner) { static gid_t add_gid(struct udev_rules *rules, const char *group) { unsigned int i; - gid_t gid; + gid_t gid = 0; unsigned int off; + int r; /* lookup, if we know it already */ for (i = 0; i < rules->gids_cur; i++) { @@ -508,7 +518,13 @@ static gid_t add_gid(struct udev_rules *rules, const char *group) { return gid; } } - gid = util_lookup_group(rules->udev, group); + r = get_group_creds(&group, &gid); + if (r < 0) { + if (r == -ENOENT || r == -ESRCH) + log_error("specified group '%s' unknown", group); + else + log_error_errno(r, "error resolving group '%s': %m", group); + } /* grow buffer if needed */ if (rules->gids_cur+1 >= rules->gids_max) { @@ -613,6 +629,7 @@ static int import_file_into_properties(struct udev_device *dev, const char *file static int import_program_into_properties(struct udev_event *event, usec_t timeout_usec, + usec_t timeout_warn_usec, const char *program, const sigset_t *sigmask) { struct udev_device *dev = event->dev; char **envp; @@ -621,7 +638,7 @@ static int import_program_into_properties(struct udev_event *event, int err; envp = udev_device_get_properties_envp(dev); - err = udev_event_spawn(event, timeout_usec, program, envp, sigmask, result, sizeof(result)); + err = udev_event_spawn(event, timeout_usec, timeout_warn_usec, program, envp, sigmask, result, sizeof(result)); if (err < 0) return err; @@ -761,7 +778,7 @@ static int get_key(struct udev *udev, char **line, char **key, enum operation_ty break; if (linepos[0] == '=') break; - if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':')) + if ((linepos[0] == '+') || (linepos[0] == '-') || (linepos[0] == '!') || (linepos[0] == ':')) if (linepos[1] == '=') break; } @@ -785,6 +802,9 @@ static int get_key(struct udev *udev, char **line, char **key, enum operation_ty } else if (linepos[0] == '+' && linepos[1] == '=') { *op = OP_ADD; linepos += 2; + } else if (linepos[0] == '-' && linepos[1] == '=') { + *op = OP_REMOVE; + linepos += 2; } else if (linepos[0] == '=') { *op = OP_ASSIGN; linepos++; @@ -1022,11 +1042,11 @@ static int add_rule(struct udev_rules *rules, char *line, const char *filename, unsigned int filename_off, unsigned int lineno) { char *linepos; const char *attr; - struct rule_tmp rule_tmp; + struct rule_tmp rule_tmp = { + .rules = rules, + .rule.type = TK_RULE, + }; - memzero(&rule_tmp, sizeof(struct rule_tmp)); - rule_tmp.rules = rules; - rule_tmp.rule.type = TK_RULE; /* the offset in the rule is limited to unsigned short */ if (filename_off < USHRT_MAX) rule_tmp.rule.rule.filename_off = filename_off; @@ -1047,15 +1067,14 @@ static int add_rule(struct udev_rules *rules, char *line, /* If we aren't at the end of the line, this is a parsing error. * Make a best effort to describe where the problem is. */ - if (*linepos != '\n') { - char buf[2] = {linepos[1]}; + if (!strchr(NEWLINE "\0", *linepos)) { + char buf[2] = {*linepos}; _cleanup_free_ char *tmp; tmp = cescape(buf); - log_error("invalid key/value pair in file %s on line %u," - "starting at character %tu ('%s')\n", + log_error("invalid key/value pair in file %s on line %u, starting at character %tu ('%s')", filename, lineno, linepos - line + 1, tmp); - if (linepos[1] == '#') + if (*linepos == '#') log_error("hint: comments can only start at beginning of line"); } break; @@ -1121,6 +1140,10 @@ static int add_rule(struct udev_rules *rules, char *line, log_error("error parsing ATTR attribute"); goto invalid; } + if (op == OP_REMOVE) { + log_error("invalid ATTR operation"); + goto invalid; + } if (op < OP_MATCH_MAX) { rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr); } else { @@ -1135,6 +1158,10 @@ static int add_rule(struct udev_rules *rules, char *line, log_error("error parsing SECLABEL attribute"); goto invalid; } + if (op == OP_REMOVE) { + log_error("invalid SECLABEL operation"); + goto invalid; + } rule_add_key(&rule_tmp, TK_A_SECLABEL, op, value, attr); continue; @@ -1202,6 +1229,10 @@ static int add_rule(struct udev_rules *rules, char *line, log_error("error parsing ENV attribute"); goto invalid; } + if (op == OP_REMOVE) { + log_error("invalid ENV operation"); + goto invalid; + } if (op < OP_MATCH_MAX) { if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0) goto invalid; @@ -1242,6 +1273,10 @@ static int add_rule(struct udev_rules *rules, char *line, } if (streq(key, "PROGRAM")) { + if (op == OP_REMOVE) { + log_error("invalid PROGRAM operation"); + goto invalid; + } rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL); continue; } @@ -1261,6 +1296,10 @@ static int add_rule(struct udev_rules *rules, char *line, log_error("IMPORT{} type missing, ignoring IMPORT %s:%u", filename, lineno); continue; } + if (op == OP_REMOVE) { + log_error("invalid IMPORT operation"); + goto invalid; + } if (streq(attr, "program")) { /* find known built-in command */ if (value[0] != '/') { @@ -1316,6 +1355,10 @@ static int add_rule(struct udev_rules *rules, char *line, attr = get_key_attribute(rules->udev, key + strlen("RUN")); if (attr == NULL) attr = "program"; + if (op == OP_REMOVE) { + log_error("invalid RUN operation"); + goto invalid; + } if (streq(attr, "builtin")) { enum udev_builtin_cmd cmd = udev_builtin_lookup(value); @@ -1336,21 +1379,37 @@ static int add_rule(struct udev_rules *rules, char *line, } if (streq(key, "WAIT_FOR") || streq(key, "WAIT_FOR_SYSFS")) { + if (op == OP_REMOVE) { + log_error("invalid WAIT_FOR/WAIT_FOR_SYSFS operation"); + goto invalid; + } rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL); continue; } if (streq(key, "LABEL")) { + if (op == OP_REMOVE) { + log_error("invalid LABEL operation"); + goto invalid; + } rule_tmp.rule.rule.label_off = rules_add_string(rules, value); continue; } if (streq(key, "GOTO")) { + if (op == OP_REMOVE) { + log_error("invalid GOTO operation"); + goto invalid; + } rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL); continue; } if (startswith(key, "NAME")) { + if (op == OP_REMOVE) { + log_error("invalid NAME operation"); + goto invalid; + } if (op < OP_MATCH_MAX) { rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL); } else { @@ -1371,6 +1430,10 @@ static int add_rule(struct udev_rules *rules, char *line, } if (streq(key, "SYMLINK")) { + if (op == OP_REMOVE) { + log_error("invalid SYMLINK operation"); + goto invalid; + } if (op < OP_MATCH_MAX) rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL); else @@ -1383,6 +1446,11 @@ static int add_rule(struct udev_rules *rules, char *line, uid_t uid; char *endptr; + if (op == OP_REMOVE) { + log_error("invalid OWNER operation"); + goto invalid; + } + uid = strtoul(value, &endptr, 10); if (endptr[0] == '\0') { rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid); @@ -1400,6 +1468,11 @@ static int add_rule(struct udev_rules *rules, char *line, gid_t gid; char *endptr; + if (op == OP_REMOVE) { + log_error("invalid GROUP operation"); + goto invalid; + } + gid = strtoul(value, &endptr, 10); if (endptr[0] == '\0') { rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid); @@ -1417,6 +1490,11 @@ static int add_rule(struct udev_rules *rules, char *line, mode_t mode; char *endptr; + if (op == OP_REMOVE) { + log_error("invalid MODE operation"); + goto invalid; + } + mode = strtol(value, &endptr, 8); if (endptr[0] == '\0') rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode); @@ -1429,6 +1507,11 @@ static int add_rule(struct udev_rules *rules, char *line, if (streq(key, "OPTIONS")) { const char *pos; + if (op == OP_REMOVE) { + log_error("invalid OPTIONS operation"); + goto invalid; + } + pos = strstr(value, "link_priority="); if (pos != NULL) { int prio = atoi(&pos[strlen("link_priority=")]); @@ -1492,7 +1575,7 @@ invalid: } static int parse_file(struct udev_rules *rules, const char *filename) { - FILE *f; + _cleanup_fclose_ FILE *f = NULL; unsigned int first_token; unsigned int filename_off; char line[UTIL_LINE_SIZE]; @@ -1550,7 +1633,6 @@ static int parse_file(struct udev_rules *rules, const char *filename) { } add_rule(rules, key, filename, filename_off, line_nr); } - fclose(f); /* link GOTOs to LABEL rules in this file to be able to fast-forward */ for (i = first_token+1; i < rules->token_cur; i++) { @@ -1603,7 +1685,7 @@ struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names) { r = conf_files_list_strv(&files, ".rules", NULL, rules_dirs); if (r < 0) { - log_error("failed to enumerate rules files: %s", strerror(-r)); + log_error_errno(r, "failed to enumerate rules files: %m"); return udev_rules_unref(rules); } @@ -1793,6 +1875,8 @@ enum escape_type { int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event, usec_t timeout_usec, + usec_t timeout_warn_usec, + struct udev_list *properties_list, const sigset_t *sigmask) { struct token *cur; struct token *rule; @@ -1858,7 +1942,18 @@ int udev_rules_apply_to_event(struct udev_rules *rules, const char *value; value = udev_device_get_property_value(event->dev, key_name); - if (value == NULL) + + /* check global properties */ + if (!value && properties_list) { + struct udev_list_entry *list_entry; + + list_entry = udev_list_get_entry(properties_list); + list_entry = udev_list_entry_get_by_name(list_entry, key_name); + if (list_entry != NULL) + value = udev_list_entry_get_value(list_entry); + } + + if (!value) value = ""; if (match_key(rules, cur, value)) goto nomatch; @@ -2001,7 +2096,7 @@ int udev_rules_apply_to_event(struct udev_rules *rules, rules_str(rules, rule->rule.filename_off), rule->rule.filename_line); - if (udev_event_spawn(event, timeout_usec, program, envp, sigmask, result, sizeof(result)) < 0) { + if (udev_event_spawn(event, timeout_usec, timeout_warn_usec, program, envp, sigmask, result, sizeof(result)) < 0) { if (cur->key.op != OP_NOMATCH) goto nomatch; } else { @@ -2037,7 +2132,7 @@ int udev_rules_apply_to_event(struct udev_rules *rules, rules_str(rules, rule->rule.filename_off), rule->rule.filename_line); - if (import_program_into_properties(event, timeout_usec, import, sigmask) != 0) + if (import_program_into_properties(event, timeout_usec, timeout_warn_usec, import, sigmask) != 0) if (cur->key.op != OP_NOMATCH) goto nomatch; break; @@ -2170,6 +2265,8 @@ int udev_rules_apply_to_event(struct udev_rules *rules, break; case TK_A_OWNER: { char owner[UTIL_NAME_SIZE]; + const char *ow = owner; + int r; if (event->owner_final) break; @@ -2177,7 +2274,15 @@ int udev_rules_apply_to_event(struct udev_rules *rules, event->owner_final = true; udev_event_apply_format(event, rules_str(rules, cur->key.value_off), owner, sizeof(owner)); event->owner_set = true; - event->uid = util_lookup_user(event->udev, owner); + r = get_user_creds(&ow, &event->uid, NULL, NULL, NULL); + if (r < 0) { + if (r == -ENOENT || r == -ESRCH) + log_error("specified user '%s' unknown", owner); + else + log_error_errno(r, "error resolving user '%s': %m", owner); + + event->uid = 0; + } log_debug("OWNER %u %s:%u", event->uid, rules_str(rules, rule->rule.filename_off), @@ -2186,6 +2291,8 @@ int udev_rules_apply_to_event(struct udev_rules *rules, } case TK_A_GROUP: { char group[UTIL_NAME_SIZE]; + const char *gr = group; + int r; if (event->group_final) break; @@ -2193,7 +2300,15 @@ int udev_rules_apply_to_event(struct udev_rules *rules, event->group_final = true; udev_event_apply_format(event, rules_str(rules, cur->key.value_off), group, sizeof(group)); event->group_set = true; - event->gid = util_lookup_group(event->udev, group); + r = get_group_creds(&gr, &event->gid); + if (r < 0) { + if (r == -ENOENT || r == -ESRCH) + log_error("specified group '%s' unknown", group); + else + log_error_errno(r, "error resolving group '%s': %m", group); + + event->gid = 0; + } log_debug("GROUP %u %s:%u", event->gid, rules_str(rules, rule->rule.filename_off), @@ -2320,7 +2435,10 @@ int udev_rules_apply_to_event(struct udev_rules *rules, log_error("ignoring invalid tag name '%s'", tag); break; } - udev_device_add_tag(event->dev, tag); + if (cur->key.op == OP_REMOVE) + udev_device_remove_tag(event->dev, tag); + else + udev_device_add_tag(event->dev, tag); break; } case TK_A_NAME: { @@ -2417,10 +2535,10 @@ int udev_rules_apply_to_event(struct udev_rules *rules, f = fopen(attr, "we"); if (f != NULL) { if (fprintf(f, "%s", value) <= 0) - log_error("error writing ATTR{%s}: %m", attr); + log_error_errno(errno, "error writing ATTR{%s}: %m", attr); fclose(f); } else { - log_error("error opening ATTR{%s} for writing: %m", attr); + log_error_errno(errno, "error opening ATTR{%s} for writing: %m", attr); } break; } @@ -2534,19 +2652,17 @@ int udev_rules_apply_static_dev_perms(struct udev_rules *rules) { strscpyl(tags_dir, sizeof(tags_dir), "/run/udev/static_node-tags/", *t, "/", NULL); r = mkdir_p(tags_dir, 0755); - if (r < 0) { - log_error("failed to create %s: %s", tags_dir, strerror(-r)); - return r; - } + if (r < 0) + return log_error_errno(r, "failed to create %s: %m", tags_dir); unescaped_filename = xescape(rules_str(rules, cur->key.value_off), "/."); strscpyl(tag_symlink, sizeof(tag_symlink), tags_dir, unescaped_filename, NULL); r = symlink(device_node, tag_symlink); - if (r < 0 && errno != EEXIST) { - log_error("failed to create symlink %s -> %s: %m", tag_symlink, device_node); - return -errno; - } else + if (r < 0 && errno != EEXIST) + return log_error_errno(errno, "failed to create symlink %s -> %s: %m", + tag_symlink, device_node); + else r = 0; } }