X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=udev_rules.c;h=5c3d7d5d0646a81d98507a5124d5efde603cf5dd;hp=42509f16ce8688d25a81fc8254b180b624e28c0e;hb=68ab3e137b2ed017ca5d210dedfff702e21b25cf;hpb=c974742bf4d6d8fab1e1c90e2e57dae0a2f297a1 diff --git a/udev_rules.c b/udev_rules.c index 42509f16c..5c3d7d5d0 100644 --- a/udev_rules.c +++ b/udev_rules.c @@ -1,24 +1,19 @@ /* - * udev_rules.c - * - * Userspace devfs - * * Copyright (C) 2003 Greg Kroah-Hartman - * Copyright (C) 2003-2005 Kay Sievers - * + * Copyright (C) 2003-2006 Kay Sievers * * 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., - * 675 Mass Ave, Cambridge, MA 02139, USA. + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * */ @@ -30,72 +25,15 @@ #include #include #include +#include +#include #include +#include -#include "libsysfs/sysfs/libsysfs.h" -#include "list.h" -#include "udev_libc_wrapper.h" #include "udev.h" -#include "udev_utils.h" -#include "udev_version.h" -#include "logging.h" #include "udev_rules.h" -#include "udev_db.h" -/* compare string with pattern (supports * ? [0-9] [!A-Z]) */ -static int strcmp_pattern(const char *p, const char *s) -{ - if (s[0] == '\0') { - while (p[0] == '*') - p++; - return (p[0] != '\0'); - } - switch (p[0]) { - case '[': - { - int not = 0; - p++; - if (p[0] == '!') { - not = 1; - p++; - } - while ((p[0] != '\0') && (p[0] != ']')) { - int match = 0; - if (p[1] == '-') { - if ((s[0] >= p[0]) && (s[0] <= p[2])) - match = 1; - p += 3; - } else { - match = (p[0] == s[0]); - p++; - } - if (match ^ not) { - while ((p[0] != '\0') && (p[0] != ']')) - p++; - if (p[0] == ']') - return strcmp_pattern(p+1, s+1); - } - } - } - break; - case '*': - if (strcmp_pattern(p, s+1)) - return strcmp_pattern(p+1, s); - return 0; - case '\0': - if (s[0] == '\0') { - return 0; - } - break; - default: - if ((p[0] == s[0]) || (p[0] == '?')) - return strcmp_pattern(p+1, s+1); - break; - } - return 1; -} - /* extract possible {attr} and move str behind it */ static char *get_format_attribute(char **str) { @@ -135,118 +73,367 @@ static int get_format_len(char **str) return -1; } -/** Finds the lowest positive N such that N isn't present in - * $(udevroot) either as a file or a symlink. - * - * @param name Name to check for - * @return 0 if didn't exist and N otherwise. - */ -static int find_free_number(struct udevice *udev, const char *name) +static int get_key(char **line, char **key, char **value) { - char devpath[PATH_SIZE]; - char filename[PATH_SIZE]; - int num = 0; + char *linepos; + char *temp; + + linepos = *line; + if (!linepos) + return -1; + + if (strchr(linepos, '\\')) { + dbg("escaped characters are not supported, skip"); + return -1; + } + + /* skip whitespace */ + while (isspace(linepos[0])) + linepos++; - strlcpy(filename, name, sizeof(filename)); + /* get the key */ + *key = linepos; while (1) { - dbg("look for existing node '%s'", filename); - if (udev_db_search_name(devpath, sizeof(devpath), filename) != 0) { - dbg("free num=%d", num); - return num; - } + linepos++; + if (linepos[0] == '\0') + return -1; + if (isspace(linepos[0])) + break; + if (linepos[0] == '=') + break; + } + + /* terminate key */ + linepos[0] = '\0'; + linepos++; - num++; - if (num > 1000) { - info("find_free_number gone crazy (num=%d), aborted", num); + /* skip whitespace */ + while (isspace(linepos[0])) + linepos++; + + /* get the value*/ + if (linepos[0] == '"') { + linepos++; + temp = strchr(linepos, '"'); + if (!temp) { + dbg("missing closing quote"); + return -1; + } + dbg("value is quoted"); + temp[0] = '\0'; + } else if (linepos[0] == '\'') { + linepos++; + temp = strchr(linepos, '\''); + if (!temp) { + dbg("missing closing quote"); return -1; } - snprintf(filename, sizeof(filename), "%s%d", name, num); - filename[sizeof(filename)-1] = '\0'; + dbg("value is quoted"); + temp[0] = '\0'; + } else if (linepos[0] == '\0') { + dbg("value is empty"); + } else { + temp = linepos; + while (temp[0] && !isspace(temp[0])) + temp++; + temp[0] = '\0'; } + *value = linepos; + + return 0; } -static int find_sysfs_attribute(struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device, - const char *name, char *value, size_t len) +static int import_keys_into_env(struct udevice *udev, const char *buf, size_t bufsize) { - struct sysfs_attribute *tmpattr; + char line[LINE_SIZE]; + const char *bufline; + char *linepos; + char *variable; + char *value; + size_t cur; + size_t count; + int lineno; + + /* loop through the whole buffer */ + lineno = 0; + cur = 0; + while (cur < bufsize) { + count = buf_get_line(buf, bufsize, cur); + bufline = &buf[cur]; + cur += count+1; + lineno++; + + if (count >= sizeof(line)) { + err("line too long, conf line skipped %s, line %d", udev_config_filename, lineno); + continue; + } - dbg("look for device attribute '%s'", name); - if (class_dev) { - tmpattr = sysfs_get_classdev_attr(class_dev, name); - if (tmpattr) - goto attr_found; - } - if (sysfs_device) { - tmpattr = sysfs_get_device_attr(sysfs_device, name); - if (tmpattr) - goto attr_found; + /* eat the whitespace */ + while ((count > 0) && isspace(bufline[0])) { + bufline++; + count--; + } + if (count == 0) + continue; + + /* see if this is a comment */ + if (bufline[0] == COMMENT_CHARACTER) + continue; + + memcpy(line, bufline, count); + line[count] = '\0'; + + linepos = line; + if (get_key(&linepos, &variable, &value) == 0) { + dbg("import '%s=%s'", variable, value); + + /* handle device, renamed by external tool, returning new path */ + if (strcmp(variable, "DEVPATH") == 0) { + info("updating devpath from '%s' to '%s'", udev->dev->devpath, value); + sysfs_device_set_values(udev->dev, value, NULL, NULL); + } else + name_list_key_add(&udev->env_list, variable, value); + setenv(variable, value, 1); + } } - return -1; + return 0; +} -attr_found: - strlcpy(value, tmpattr->value, len); - remove_trailing_char(value, '\n'); +static int import_file_into_env(struct udevice *udev, const char *filename) +{ + char *buf; + size_t bufsize; + + if (file_map(filename, &buf, &bufsize) != 0) { + err("can't open '%s': %s", filename, strerror(errno)); + return -1; + } + import_keys_into_env(udev, buf, bufsize); + file_unmap(buf, bufsize); - dbg("found attribute '%s'", tmpattr->path); return 0; } -static void apply_format(struct udevice *udev, char *string, size_t maxsize, - struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device) +static int import_program_into_env(struct udevice *udev, const char *program) +{ + char result[1024]; + size_t reslen; + + if (run_program(program, udev->dev->subsystem, result, sizeof(result), &reslen, (udev_log_priority >= LOG_INFO)) != 0) + return -1; + return import_keys_into_env(udev, result, reslen); +} + +static int import_parent_into_env(struct udevice *udev, const char *filter) +{ + struct sysfs_device *dev_parent; + int rc = -1; + + dev_parent = sysfs_device_get_parent(udev->dev); + if (dev_parent != NULL) { + struct udevice *udev_parent; + struct name_entry *name_loop; + + dbg("found parent '%s', get the node name", dev_parent->devpath); + udev_parent = udev_device_init(NULL); + if (udev_parent == NULL) + return -1; + /* import the udev_db of the parent */ + if (udev_db_get_device(udev_parent, dev_parent->devpath) == 0) { + dbg("import stored parent env '%s'", udev_parent->name); + list_for_each_entry(name_loop, &udev_parent->env_list, node) { + char name[NAME_SIZE]; + char *pos; + + strlcpy(name, name_loop->name, sizeof(name)); + pos = strchr(name, '='); + if (pos) { + pos[0] = '\0'; + pos++; + if (fnmatch(filter, name, 0) == 0) { + dbg("import key '%s'", name_loop->name); + name_list_add(&udev->env_list, name_loop->name, 0); + setenv(name, pos, 1); + } else + dbg("skip key '%s'", name_loop->name); + } + } + rc = 0; + } else + dbg("parent not found in database"); + udev_device_cleanup(udev_parent); + } + + return rc; +} + +#define WAIT_LOOP_PER_SECOND 50 +static int wait_for_sysfs(struct udevice *udev, const char *file, int timeout) +{ + char devicepath[PATH_SIZE]; + char filepath[PATH_SIZE]; + struct stat stats; + int loop = timeout * WAIT_LOOP_PER_SECOND; + + strlcpy(devicepath, sysfs_path, sizeof(devicepath)); + strlcat(devicepath, udev->dev->devpath, sizeof(devicepath)); + strlcpy(filepath, devicepath, sizeof(filepath)); + strlcat(filepath, "/", sizeof(filepath)); + strlcat(filepath, file, sizeof(filepath)); + + dbg("will wait %i sec for '%s'", timeout, filepath); + while (--loop) { + /* lookup file */ + if (stat(filepath, &stats) == 0) { + info("file '%s' appeared after %i loops", filepath, (timeout * WAIT_LOOP_PER_SECOND) - loop-1); + return 0; + } + /* make sure, the device did not disappear in the meantime */ + if (stat(devicepath, &stats) != 0) { + info("device disappeared while waiting for '%s'", filepath); + return -2; + } + info("wait for '%s' for %i mseconds", filepath, 1000 / WAIT_LOOP_PER_SECOND); + usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND); + } + err("waiting for '%s' failed", filepath); + return -1; +} + +void udev_rules_apply_format(struct udevice *udev, char *string, size_t maxsize) { char temp[PATH_SIZE]; char temp2[PATH_SIZE]; - char *tail, *pos, *cpos, *attr, *rest; + char *head, *tail, *pos, *cpos, *attr, *rest; int len; int i; - char c; - unsigned int next_free_number; - struct sysfs_class_device *class_dev_parent; - - pos = string; + int count; + enum subst_type { + SUBST_UNKNOWN, + SUBST_DEVPATH, + SUBST_KERNEL, + SUBST_KERNEL_NUMBER, + SUBST_ID, + SUBST_MAJOR, + SUBST_MINOR, + SUBST_RESULT, + SUBST_ATTR, + SUBST_PARENT, + SUBST_TEMP_NODE, + SUBST_ROOT, + SUBST_ENV, + }; + static const struct subst_map { + char *name; + char fmt; + enum subst_type type; + } map[] = { + { .name = "devpath", .fmt = 'p', .type = SUBST_DEVPATH }, + { .name = "number", .fmt = 'n', .type = SUBST_KERNEL_NUMBER }, + { .name = "kernel", .fmt = 'k', .type = SUBST_KERNEL }, + { .name = "id", .fmt = 'b', .type = SUBST_ID }, + { .name = "major", .fmt = 'M', .type = SUBST_MAJOR }, + { .name = "minor", .fmt = 'm', .type = SUBST_MINOR }, + { .name = "result", .fmt = 'c', .type = SUBST_RESULT }, + { .name = "attr", .fmt = 's', .type = SUBST_ATTR }, + { .name = "sysfs", .fmt = 's', .type = SUBST_ATTR }, + { .name = "parent", .fmt = 'P', .type = SUBST_PARENT }, + { .name = "tempnode", .fmt = 'N', .type = SUBST_TEMP_NODE }, + { .name = "root", .fmt = 'r', .type = SUBST_ROOT }, + { .name = "env", .fmt = 'E', .type = SUBST_ENV }, + { NULL, '\0', 0 } + }; + enum subst_type type; + const struct subst_map *subst; + + head = string; while (1) { - pos = strchr(pos, '%'); - if (pos == NULL) - break; - - pos[0] = '\0'; - tail = pos+1; - len = get_format_len(&tail); - c = tail[0]; - strlcpy(temp, tail+1, sizeof(temp)); - tail = temp; - dbg("format=%c, string='%s', tail='%s'",c , string, tail); + len = -1; + while (head[0] != '\0') { + if (head[0] == '$') { + /* substitute named variable */ + if (head[1] == '\0') + break; + if (head[1] == '$') { + strlcpy(temp, head+2, sizeof(temp)); + strlcpy(head+1, temp, maxsize); + head++; + continue; + } + head[0] = '\0'; + for (subst = map; subst->name; subst++) { + if (strncasecmp(&head[1], subst->name, strlen(subst->name)) == 0) { + type = subst->type; + tail = head + strlen(subst->name)+1; + dbg("will substitute format name '%s'", subst->name); + goto found; + } + } + head[0] = '$'; + err("unknown format variable '%s'", head); + } else if (head[0] == '%') { + /* substitute format char */ + if (head[1] == '\0') + break; + if (head[1] == '%') { + strlcpy(temp, head+2, sizeof(temp)); + strlcpy(head+1, temp, maxsize); + head++; + continue; + } + head[0] = '\0'; + tail = head+1; + len = get_format_len(&tail); + for (subst = map; subst->name; subst++) { + if (tail[0] == subst->fmt) { + type = subst->type; + tail++; + dbg("will substitute format char '%c'", subst->fmt); + goto found; + } + } + head[0] = '%'; + err("unknown format char '%c'", tail[0]); + } + head++; + } + break; +found: attr = get_format_attribute(&tail); + strlcpy(temp, tail, sizeof(temp)); + dbg("format=%i, string='%s', tail='%s'", type ,string, tail); - switch (c) { - case 'p': - strlcat(string, udev->devpath, maxsize); - dbg("substitute kernel name '%s'", udev->kernel_name); + switch (type) { + case SUBST_DEVPATH: + strlcat(string, udev->dev->devpath, maxsize); + dbg("substitute devpath '%s'", udev->dev->devpath); break; - case 'b': - strlcat(string, udev->bus_id, maxsize); - dbg("substitute bus_id '%s'", udev->bus_id); + case SUBST_KERNEL: + strlcat(string, udev->dev->kernel, maxsize); + dbg("substitute kernel name '%s'", udev->dev->kernel); break; - case 'k': - strlcat(string, udev->kernel_name, maxsize); - dbg("substitute kernel name '%s'", udev->kernel_name); + case SUBST_KERNEL_NUMBER: + strlcat(string, udev->dev->kernel_number, maxsize); + dbg("substitute kernel number '%s'", udev->dev->kernel_number); break; - case 'n': - strlcat(string, udev->kernel_number, maxsize); - dbg("substitute kernel number '%s'", udev->kernel_number); - break; - case 'm': - sprintf(temp2, "%d", minor(udev->devt)); - strlcat(string, temp2, maxsize); - dbg("substitute minor number '%s'", temp2); + case SUBST_ID: + if (udev->dev_parent != NULL) { + strlcat(string, udev->dev_parent->kernel, maxsize); + dbg("substitute id '%s'", udev->dev_parent->kernel); + } break; - case 'M': + case SUBST_MAJOR: sprintf(temp2, "%d", major(udev->devt)); strlcat(string, temp2, maxsize); dbg("substitute major number '%s'", temp2); break; - case 'c': + case SUBST_MINOR: + sprintf(temp2, "%d", minor(udev->devt)); + strlcat(string, temp2, maxsize); + dbg("substitute minor number '%s'", temp2); + break; + case SUBST_RESULT: if (udev->program_result[0] == '\0') break; /* get part part of the result string */ @@ -280,466 +467,451 @@ static void apply_format(struct udevice *udev, char *string, size_t maxsize, dbg("substitute result string '%s'", udev->program_result); } break; - case 's': - if (attr == NULL) { - dbg("missing attribute"); - break; - } - if (find_sysfs_attribute(class_dev, sysfs_device, attr, temp2, sizeof(temp2)) != 0) { - struct sysfs_device *parent_device; - - dbg("sysfs attribute '%s' not found, walk up the physical devices", attr); - parent_device = sysfs_get_device_parent(sysfs_device); - while (parent_device) { - dbg("looking at '%s'", parent_device->path); - if (find_sysfs_attribute(NULL, parent_device, attr, temp2, sizeof(temp2)) == 0) - break; - parent_device = sysfs_get_device_parent(parent_device); + case SUBST_ATTR: + if (attr == NULL) + err("missing file parameter for attr"); + else { + const char *value = NULL; + size_t size; + + /* first try the current device, other matches may have selected */ + if (udev->dev_parent != NULL && udev->dev_parent != udev->dev) + value = sysfs_attr_get_value(udev->dev_parent->devpath, attr); + + /* look at all devices along the chain of parents */ + if (value == NULL) { + struct sysfs_device *dev_parent = udev->dev; + + do { + dbg("looking at '%s'", dev_parent->devpath); + value = sysfs_attr_get_value(dev_parent->devpath, attr); + if (value != NULL) { + strlcpy(temp2, value, sizeof(temp2)); + break; + } + dev_parent = sysfs_device_get_parent(dev_parent); + } while (dev_parent != NULL); } - if (!parent_device) + + if (value == NULL) break; - } - /* strip trailing whitespace of sysfs value */ - i = strlen(temp2); - while (i > 0 && isspace(temp2[i-1])) - temp2[--i] = '\0'; - replace_untrusted_chars(temp2); - strlcat(string, temp2, maxsize); - dbg("substitute sysfs value '%s'", temp2); - break; - case '%': - strlcat(string, "%", maxsize); - pos++; - break; - case 'e': - next_free_number = find_free_number(udev, string); - if (next_free_number > 0) { - sprintf(temp2, "%d", next_free_number); + + /* strip trailing whitespace and replace untrusted characters of sysfs value */ + size = strlcpy(temp2, value, sizeof(temp2)); + if (size >= sizeof(temp2)) + size = sizeof(temp2)-1; + while (size > 0 && isspace(temp2[size-1])) + temp2[--size] = '\0'; + count = replace_untrusted_chars(temp2); + if (count > 0) + info("%i untrusted character(s) replaced" , count); strlcat(string, temp2, maxsize); + dbg("substitute sysfs value '%s'", temp2); } break; - case 'P': - if (!class_dev) - break; - class_dev_parent = sysfs_get_classdev_parent(class_dev); - if (class_dev_parent != NULL) { - struct udevice udev_parent; - - dbg("found parent '%s', get the node name", class_dev_parent->path); - udev_init_device(&udev_parent, NULL, NULL, NULL); - /* lookup the name in the udev_db with the DEVPATH of the parent */ - if (udev_db_get_device(&udev_parent, &class_dev_parent->path[strlen(sysfs_path)]) == 0) { - strlcat(string, udev_parent.name, maxsize); - dbg("substitute parent node name'%s'", udev_parent.name); - } else - dbg("parent not found in database"); - udev_cleanup_device(&udev_parent); + case SUBST_PARENT: + { + struct sysfs_device *dev_parent; + + dev_parent = sysfs_device_get_parent(udev->dev); + if (dev_parent != NULL) { + struct udevice *udev_parent; + + dbg("found parent '%s', get the node name", dev_parent->devpath); + udev_parent = udev_device_init(NULL); + if (udev_parent != NULL) { + /* lookup the name in the udev_db with the DEVPATH of the parent */ + if (udev_db_get_device(udev_parent, dev_parent->devpath) == 0) { + strlcat(string, udev_parent->name, maxsize); + dbg("substitute parent node name'%s'", udev_parent->name); + } else + dbg("parent not found in database"); + udev_device_cleanup(udev_parent); + } + } } break; - case 'N': - if (udev->tmp_node[0] == '\0') { + case SUBST_TEMP_NODE: + if (udev->tmp_node[0] == '\0' && major(udev->devt) > 0) { dbg("create temporary device node for callout"); snprintf(udev->tmp_node, sizeof(udev->tmp_node), "%s/.tmp-%u-%u", udev_root, major(udev->devt), minor(udev->devt)); udev->tmp_node[sizeof(udev->tmp_node)-1] = '\0'; - udev_make_node(udev, udev->tmp_node, udev->devt, 0600, 0, 0); + udev_node_mknod(udev, udev->tmp_node, udev->devt, 0600, 0, 0); } strlcat(string, udev->tmp_node, maxsize); dbg("substitute temporary device node name '%s'", udev->tmp_node); break; - case 'r': + case SUBST_ROOT: strlcat(string, udev_root, maxsize); dbg("substitute udev_root '%s'", udev_root); break; + case SUBST_ENV: + if (attr == NULL) { + dbg("missing attribute"); + break; + } + pos = getenv(attr); + if (pos == NULL) { + dbg("env '%s' not available", attr); + break; + } + dbg("substitute env '%s=%s'", attr, pos); + strlcat(string, pos, maxsize); + break; default: - err("unknown substitution type '%%%c'", c); + err("unknown substitution type=%i", type); break; } - /* truncate to specified length */ - if (len > 0) - pos[len] = '\0'; - - strlcat(string, tail, maxsize); + /* possibly truncate to format-char specified length */ + if (len >= 0 && len < (int)strlen(head)) { + head[len] = '\0'; + dbg("truncate to %i chars, subtitution string becomes '%s'", len, head); + } + strlcat(string, temp, maxsize); } } -static int execute_program_pipe(const char *command, const char *subsystem, char *value, int len) +static char *key_val(struct udev_rule *rule, struct key *key) { - int retval; - int count; - int status; - int pipefds[2]; - pid_t pid; + return rule->buf + key->val_off; +} + +static char *key_pair_name(struct udev_rule *rule, struct key_pair *pair) +{ + return rule->buf + pair->key_name_off; +} + +static int match_key(const char *key_name, struct udev_rule *rule, struct key *key, const char *val) +{ + char value[PATH_SIZE]; + char *key_value; char *pos; - char arg[PATH_SIZE]; - char *argv[(sizeof(arg) / 2) + 1]; - int devnull; - int i; + int match = 0; - strlcpy(arg, command, sizeof(arg)); - i = 0; - if (strchr(arg, ' ')) { - pos = arg; - while (pos != NULL) { - if (pos[0] == '\'') { - /* don't separate if in apostrophes */ - pos++; - argv[i] = strsep(&pos, "\'"); - while (pos && pos[0] == ' ') - pos++; - } else { - argv[i] = strsep(&pos, " "); - } - dbg("arg[%i] '%s'", i, argv[i]); - i++; + if (key->operation != KEY_OP_MATCH && + key->operation != KEY_OP_NOMATCH) + return 0; + + /* look for a matching string, parts are separated by '|' */ + strlcpy(value, rule->buf + key->val_off, sizeof(value)); + key_value = value; + dbg("key %s value='%s'", key_name, key_value); + while (key_value) { + pos = strchr(key_value, '|'); + if (pos) { + pos[0] = '\0'; + pos++; } - argv[i] = NULL; - dbg("execute '%s' with parsed arguments", arg); - } else { - argv[0] = arg; - argv[1] = (char *) subsystem; - argv[2] = NULL; - dbg("execute '%s' with subsystem '%s' argument", arg, argv[1]); + + dbg("match %s '%s' <-> '%s'", key_name, key_value, val); + match = (fnmatch(key_value, val, 0) == 0); + if (match) + break; + + key_value = pos; } - retval = pipe(pipefds); - if (retval != 0) { - err("pipe failed"); - return -1; + if (match && (key->operation == KEY_OP_MATCH)) { + dbg("%s is true (matching value)", key_name); + return 0; } + if (!match && (key->operation == KEY_OP_NOMATCH)) { + dbg("%s is true (non-matching value)", key_name); + return 0; + } + return -1; +} - pid = fork(); - switch(pid) { - case 0: - /* child dup2 write side of pipe to STDOUT */ - devnull = open("/dev/null", O_RDWR); - if (devnull >= 0) { - dup2(devnull, STDIN_FILENO); - dup2(devnull, STDERR_FILENO); - close(devnull); - } - dup2(pipefds[1], STDOUT_FILENO); - retval = execv(arg, argv); - err("exec of program failed"); - _exit(1); - case -1: - err("fork of '%s' failed", arg); - retval = -1; - break; - default: - /* parent reads from pipefds[0] */ - close(pipefds[1]); - retval = 0; - i = 0; - while (1) { - count = read(pipefds[0], value + i, len - i-1); - if (count < 0) { - err("read failed with '%s'", strerror(errno)); - retval = -1; - } +/* match a single rule against a given device and possibly its parent devices */ +static int match_rule(struct udevice *udev, struct udev_rule *rule) +{ + int i; - if (count == 0) - break; + if (match_key("ACTION", rule, &rule->action, udev->action)) + goto nomatch; - i += count; - if (i >= len-1) { - err("result len %d too short", len); - retval = -1; - break; - } - } - value[i] = '\0'; + if (match_key("KERNEL", rule, &rule->kernel, udev->dev->kernel)) + goto nomatch; - close(pipefds[0]); - waitpid(pid, &status, 0); + if (match_key("SUBSYSTEM", rule, &rule->subsystem, udev->dev->subsystem)) + goto nomatch; - if (!WIFEXITED(status) || (WEXITSTATUS(status) != 0)) { - dbg("exec program status 0x%x", status); - retval = -1; - } - } + if (match_key("DEVPATH", rule, &rule->devpath, udev->dev->devpath)) + goto nomatch; - if (!retval) { - remove_trailing_char(value, '\n'); - dbg("result is '%s'", value); - replace_untrusted_chars(value); - } else - value[0] = '\0'; + if (match_key("DRIVER", rule, &rule->driver, udev->dev->driver)) + goto nomatch; - return retval; -} + /* match NAME against a value assigned by an earlier rule */ + if (match_key("NAME", rule, &rule->name, udev->name)) + goto nomatch; -static int match_rule(struct udevice *udev, struct udev_rule *rule, - struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device) -{ - struct sysfs_device *parent_device = sysfs_device; - - if (rule->action_operation != KEY_OP_UNSET) { - dbg("check for " KEY_ACTION " rule->action='%s' udev->action='%s'", - rule->action, udev->action); - if (strcmp_pattern(rule->action, udev->action) != 0) { - dbg(KEY_ACTION " is not matching"); - if (rule->action_operation != KEY_OP_NOMATCH) - goto exit; - } else { - dbg(KEY_ACTION " matches"); - if (rule->action_operation == KEY_OP_NOMATCH) - goto exit; - } - dbg(KEY_ACTION " key is true"); - } + for (i = 0; i < rule->env.count; i++) { + struct key_pair *pair = &rule->env.keys[i]; - if (rule->kernel_operation != KEY_OP_UNSET) { - dbg("check for " KEY_KERNEL " rule->kernel='%s' udev_kernel_name='%s'", - rule->kernel, udev->kernel_name); - if (strcmp_pattern(rule->kernel, udev->kernel_name) != 0) { - dbg(KEY_KERNEL " is not matching"); - if (rule->kernel_operation != KEY_OP_NOMATCH) - goto exit; - } else { - dbg(KEY_KERNEL " matches"); - if (rule->kernel_operation == KEY_OP_NOMATCH) - goto exit; + /* we only check for matches, assignments will be handled later */ + if (pair->key.operation == KEY_OP_MATCH || + pair->key.operation == KEY_OP_NOMATCH) { + const char *key_name = key_pair_name(rule, pair); + const char *value = getenv(key_name); + + if (!value) { + dbg("ENV{'%s'} is not set, treat as empty", key_name); + value = ""; + } + if (match_key("ENV", rule, &pair->key, value)) + goto nomatch; } - dbg(KEY_KERNEL " key is true"); } - if (rule->subsystem_operation != KEY_OP_UNSET) { - dbg("check for " KEY_SUBSYSTEM " rule->subsystem='%s' udev->subsystem='%s'", - rule->subsystem, udev->subsystem); - if (strcmp_pattern(rule->subsystem, udev->subsystem) != 0) { - dbg(KEY_SUBSYSTEM " is not matching"); - if (rule->subsystem_operation != KEY_OP_NOMATCH) - goto exit; - } else { - dbg(KEY_SUBSYSTEM " matches"); - if (rule->subsystem_operation == KEY_OP_NOMATCH) - goto exit; - } - dbg(KEY_SUBSYSTEM " key is true"); + if (rule->wait_for_sysfs.operation != KEY_OP_UNSET) { + int found; + + found = (wait_for_sysfs(udev, key_val(rule, &rule->wait_for_sysfs), 3) == 0); + if (!found && (rule->wait_for_sysfs.operation != KEY_OP_NOMATCH)) + goto nomatch; } - if (rule->env_pair_count) { - int i; + /* check for matching sysfs attribute pairs */ + for (i = 0; i < rule->attr.count; i++) { + struct key_pair *pair = &rule->attr.keys[i]; - dbg("check for " KEY_ENV " pairs"); - for (i = 0; i < rule->env_pair_count; i++) { - struct key_pair *pair; + if (pair->key.operation == KEY_OP_MATCH || + pair->key.operation == KEY_OP_NOMATCH) { + const char *key_name = key_pair_name(rule, pair); + const char *key_value = key_val(rule, &pair->key); const char *value; - - pair = &rule->env_pair[i]; - value = getenv(pair->name); - if (!value) { - dbg(KEY_ENV "{'%s'} is not found", pair->name); - goto exit; - } - if (strcmp_pattern(pair->value, value) != 0) { - dbg(KEY_ENV "{'%s'} is not matching", pair->name); - if (pair->operation != KEY_OP_NOMATCH) - goto exit; - } else { - dbg(KEY_ENV "{'%s'} matches", pair->name); - if (pair->operation == KEY_OP_NOMATCH) - goto exit; + char val[VALUE_SIZE]; + size_t len; + + value = sysfs_attr_get_value(udev->dev->devpath, key_name); + if (value == NULL) + goto nomatch; + strlcpy(val, value, sizeof(val)); + + /* 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(val); + while (len > 0 && isspace(val[len-1])) + val[--len] = '\0'; + dbg("removed %zi trailing whitespace chars from '%s'", strlen(val)-len, val); } + + if (match_key("ATTR", rule, &pair->key, val)) + goto nomatch; } - dbg(KEY_ENV " key is true"); } - /* walk up the chain of physical devices and find a match */ + /* walk up the chain of parent devices and find a match */ + udev->dev_parent = udev->dev; while (1) { - /* check for matching driver */ - if (rule->driver_operation != KEY_OP_UNSET) { - if (parent_device == NULL) { - dbg("device has no sysfs_device"); - goto exit; - } - dbg("check for " KEY_DRIVER " rule->driver='%s' sysfs_device->driver_name='%s'", - rule->driver, parent_device->driver_name); - if (strcmp_pattern(rule->driver, parent_device->driver_name) != 0) { - dbg(KEY_DRIVER " is not matching"); - if (rule->driver_operation != KEY_OP_NOMATCH) - goto try_parent; - } else { - dbg(KEY_DRIVER " matches"); - if (rule->driver_operation == KEY_OP_NOMATCH) - goto try_parent; - } - dbg(KEY_DRIVER " key is true"); - } + /* check for matching kernel device name */ + if (match_key("KERNELS", rule, &rule->kernels, udev->dev_parent->kernel)) + goto try_parent; - /* check for matching bus value */ - if (rule->bus_operation != KEY_OP_UNSET) { - if (parent_device == NULL) { - dbg("device has no sysfs_device"); - goto exit; - } - dbg("check for " KEY_BUS " rule->bus='%s' sysfs_device->bus='%s'", - rule->bus, parent_device->bus); - if (strcmp_pattern(rule->bus, parent_device->bus) != 0) { - dbg(KEY_BUS " is not matching"); - if (rule->bus_operation != KEY_OP_NOMATCH) - goto try_parent; - } else { - dbg(KEY_BUS " matches"); - if (rule->bus_operation == KEY_OP_NOMATCH) - goto try_parent; - } - dbg(KEY_BUS " key is true"); - } + /* check for matching subsystem value */ + if (match_key("SUBSYSTEMS", rule, &rule->subsystems, udev->dev_parent->subsystem)) + goto try_parent; - /* check for matching bus id */ - if (rule->id_operation != KEY_OP_UNSET) { - if (parent_device == NULL) { - dbg("device has no sysfs_device"); - goto exit; - } - dbg("check " KEY_ID); - if (strcmp_pattern(rule->id, parent_device->bus_id) != 0) { - dbg(KEY_ID " is not matching"); - if (rule->id_operation != KEY_OP_NOMATCH) - goto try_parent; - } else { - dbg(KEY_ID " matches"); - if (rule->id_operation == KEY_OP_NOMATCH) - goto try_parent; - } - dbg(KEY_ID " key is true"); - } + /* check for matching driver */ + if (match_key("DRIVERS", rule, &rule->drivers, udev->dev_parent->driver)) + goto try_parent; - /* check for matching sysfs pairs */ - if (rule->sysfs_pair_count) { - int i; + /* check for matching sysfs attribute pairs */ + for (i = 0; i < rule->attrs.count; i++) { + struct key_pair *pair = &rule->attrs.keys[i]; - dbg("check " KEY_SYSFS " pairs"); - for (i = 0; i < rule->sysfs_pair_count; i++) { - struct key_pair *pair; - char value[VALUE_SIZE]; + if (pair->key.operation == KEY_OP_MATCH || + pair->key.operation == KEY_OP_NOMATCH) { + const char *key_name = key_pair_name(rule, pair); + const char *key_value = key_val(rule, &pair->key); + const char *value; + char val[VALUE_SIZE]; size_t len; - pair = &rule->sysfs_pair[i]; - if (find_sysfs_attribute(class_dev, parent_device, pair->name, value, sizeof(value)) != 0) + value = sysfs_attr_get_value(udev->dev_parent->devpath, key_name); + if (value == NULL) + value = sysfs_attr_get_value(udev->dev->devpath, key_name); + if (value == NULL) goto try_parent; + strlcpy(val, value, sizeof(val)); /* strip trailing whitespace of value, if not asked to match for it */ - len = strlen(pair->value); - if (len && !isspace(pair->value[len-1])) { - len = strlen(value); - while (len > 0 && isspace(value[len-1])) - value[--len] = '\0'; - dbg("removed %i trailing whitespace chars from '%s'", strlen(value)-len, value); + len = strlen(key_value); + if (len > 0 && !isspace(key_value[len-1])) { + len = strlen(val); + while (len > 0 && isspace(val[len-1])) + val[--len] = '\0'; + dbg("removed %zi trailing whitespace chars from '%s'", strlen(val)-len, val); } - dbg("compare attribute '%s' value '%s' with '%s'", pair->name, value, pair->value); - if (strcmp_pattern(pair->value, value) != 0) { - dbg(KEY_SYSFS "{'%s'} is not matching", pair->name); - if (pair->operation != KEY_OP_NOMATCH) - goto try_parent; - } else { - dbg(KEY_SYSFS "{'%s'} matches", pair->name); - if (pair->operation == KEY_OP_NOMATCH) - goto try_parent; - } + if (match_key("ATTRS", rule, &pair->key, val)) + goto try_parent; } - dbg(KEY_SYSFS " keys are true"); } - /* found matching physical device */ + /* found matching device */ break; try_parent: + /* move to parent device */ dbg("try parent sysfs device"); - parent_device = sysfs_get_device_parent(parent_device); - if (parent_device == NULL) - goto exit; - dbg("look at sysfs_device->path='%s'", parent_device->path); - dbg("look at sysfs_device->bus_id='%s'", parent_device->bus_id); + udev->dev_parent = sysfs_device_get_parent(udev->dev_parent); + if (udev->dev_parent == NULL) + goto nomatch; + dbg("looking at dev_parent->devpath='%s'", udev->dev_parent->devpath); + dbg("looking at dev_parent->kernel='%s'", udev->dev_parent->kernel); } /* execute external program */ - if (rule->program_operation != KEY_OP_UNSET) { + if (rule->program.operation != KEY_OP_UNSET) { char program[PATH_SIZE]; - - dbg("check " KEY_PROGRAM); - strlcpy(program, rule->program, sizeof(program)); - apply_format(udev, program, sizeof(program), class_dev, sysfs_device); - if (execute_program_pipe(program, udev->subsystem, - udev->program_result, sizeof(udev->program_result)) != 0) { - dbg(KEY_PROGRAM " returned nonzero"); - if (rule->program_operation != KEY_OP_NOMATCH) - goto exit; + char result[PATH_SIZE]; + + strlcpy(program, key_val(rule, &rule->program), sizeof(program)); + udev_rules_apply_format(udev, program, sizeof(program)); + if (run_program(program, udev->dev->subsystem, result, sizeof(result), NULL, (udev_log_priority >= LOG_INFO)) != 0) { + dbg("PROGRAM is false"); + udev->program_result[0] = '\0'; + if (rule->program.operation != KEY_OP_NOMATCH) + goto nomatch; } else { - dbg(KEY_PROGRAM " returned successful"); - if (rule->program_operation == KEY_OP_NOMATCH) - goto exit; + int count; + + dbg("PROGRAM matches"); + remove_trailing_chars(result, '\n'); + count = replace_untrusted_chars(result); + if (count) + info("%i untrusted character(s) replaced" , count); + dbg("result is '%s'", result); + strlcpy(udev->program_result, result, sizeof(udev->program_result)); + dbg("PROGRAM returned successful"); + if (rule->program.operation == KEY_OP_NOMATCH) + goto nomatch; } - dbg(KEY_PROGRAM " key is true"); + dbg("PROGRAM key is true"); } /* check for matching result of external program */ - if (rule->result_operation != KEY_OP_UNSET) { - dbg("check for " KEY_RESULT " rule->result='%s', udev->program_result='%s'", - rule->result, udev->program_result); - if (strcmp_pattern(rule->result, udev->program_result) != 0) { - dbg(KEY_RESULT " is not matching"); - if (rule->result_operation != KEY_OP_NOMATCH) - goto exit; - } else { - dbg(KEY_RESULT " matches"); - if (rule->result_operation == KEY_OP_NOMATCH) - goto exit; + if (match_key("RESULT", rule, &rule->result, udev->program_result)) + goto nomatch; + + /* import variables returned from program or or file into environment */ + if (rule->import.operation != KEY_OP_UNSET) { + char import[PATH_SIZE]; + int rc = -1; + + strlcpy(import, key_val(rule, &rule->import), sizeof(import)); + udev_rules_apply_format(udev, import, sizeof(import)); + dbg("check for IMPORT import='%s'", import); + if (rule->import_type == IMPORT_PROGRAM) { + rc = import_program_into_env(udev, import); + } else if (rule->import_type == IMPORT_FILE) { + dbg("import file import='%s'", import); + rc = import_file_into_env(udev, import); + } else if (rule->import_type == IMPORT_PARENT) { + dbg("import parent import='%s'", import); + rc = import_parent_into_env(udev, import); + } + if (rc != 0) { + dbg("IMPORT failed"); + if (rule->import.operation != KEY_OP_NOMATCH) + goto nomatch; + } else + dbg("IMPORT '%s' imported", key_val(rule, &rule->import)); + dbg("IMPORT key is true"); + } + + /* rule matches, if we have ENV assignments export it */ + for (i = 0; i < rule->env.count; i++) { + struct key_pair *pair = &rule->env.keys[i]; + + if (pair->key.operation == KEY_OP_ASSIGN) { + char temp_value[NAME_SIZE]; + const char *key_name = key_pair_name(rule, pair); + const char *value = key_val(rule, &pair->key); + + /* make sure we don't write to the same string we possibly read from */ + strlcpy(temp_value, value, sizeof(temp_value)); + udev_rules_apply_format(udev, temp_value, NAME_SIZE); + + if (temp_value[0] == '\0') { + name_list_key_remove(&udev->env_list, key_name); + unsetenv(key_name); + info("unset ENV '%s'", key_name); + } else { + char *key_value = name_list_key_add(&udev->env_list, key_name, temp_value); + + if (key_value == NULL) + break; + putenv(key_value); + info("set ENV '%s'", key_value); + } } - dbg(KEY_RESULT " key is true"); } - /* rule matches */ + /* if we have ATTR assignements write value to sysfs file */ + for (i = 0; i < rule->attr.count; i++) { + struct key_pair *pair = &rule->attr.keys[i]; + + if (pair->key.operation == KEY_OP_ASSIGN) { + const char *key_name = key_pair_name(rule, pair); + char attr[PATH_SIZE]; + char value[NAME_SIZE]; + FILE *f; + + strlcpy(attr, sysfs_path, sizeof(attr)); + strlcat(attr, udev->dev->devpath, sizeof(attr)); + strlcat(attr, "/", sizeof(attr)); + strlcat(attr, key_name, sizeof(attr)); + strlcpy(value, key_val(rule, &pair->key), sizeof(value)); + udev_rules_apply_format(udev, value, sizeof(value)); + info("writing '%s' to sysfs file '%s'", value, attr); + f = fopen(attr, "w"); + if (f != NULL) { + if (!udev->test_run) + if (fprintf(f, "%s", value) <= 0) + err("error writing ATTR{%s}: %s", attr, strerror(errno)); + fclose(f); + } else + err("error opening ATTR{%s} for writing: %s", attr, strerror(errno)); + } + } return 0; -exit: +nomatch: return -1; } -int udev_rules_get_name(struct udevice *udev, struct sysfs_class_device *class_dev) +int udev_rules_get_name(struct udev_rules *rules, struct udevice *udev) { - struct sysfs_class_device *class_dev_parent; - struct sysfs_device *sysfs_device = NULL; struct udev_rule *rule; + int name_set = 0; - dbg("class_dev->name='%s'", class_dev->name); - - /* Figure out where the "device"-symlink is at. For char devices this will - * always be in the class_dev->path. On block devices, only the main block - * device will have the device symlink in it's path. All partition devices - * need to look at the symlink in its parent directory. - */ - class_dev_parent = sysfs_get_classdev_parent(class_dev); - if (class_dev_parent != NULL) { - dbg("given class device has a parent, use this instead"); - sysfs_device = sysfs_get_classdev_device(class_dev_parent); - } else { - sysfs_device = sysfs_get_classdev_device(class_dev); - } + dbg("udev->dev->devpath='%s'", udev->dev->devpath); + dbg("udev->dev->kernel='%s'", udev->dev->kernel); - if (sysfs_device) { - dbg("found devices device: path='%s', bus_id='%s', bus='%s'", - sysfs_device->path, sysfs_device->bus_id, sysfs_device->bus); - strlcpy(udev->bus_id, sysfs_device->bus_id, sizeof(udev->bus_id)); - } + /* look for a matching rule to apply */ + udev_rules_iter_init(rules); + while (1) { + rule = udev_rules_iter_next(rules); + if (rule == NULL) + break; - dbg("udev->kernel_name='%s'", udev->kernel_name); + if (name_set && + (rule->name.operation == KEY_OP_ASSIGN || + rule->name.operation == KEY_OP_ASSIGN_FINAL || + rule->name.operation == KEY_OP_ADD)) { + dbg("node name already set, rule ignored"); + continue; + } - /* look for a matching rule to apply */ - list_for_each_entry(rule, &udev_rule_list, node) { dbg("process rule"); - if (match_rule(udev, rule, class_dev, sysfs_device) == 0) { - if (udev->name[0] != '\0' && rule->name[0] != '\0') { - dbg("node name already set, rule ignored"); - continue; - } - + if (match_rule(udev, rule) == 0) { /* apply options */ if (rule->ignore_device) { - info("configured rule in '%s[%i]' applied, '%s' is ignored", - rule->config_file, rule->config_line, udev->kernel_name); + info("rule applied, '%s' is ignored", udev->dev->kernel); udev->ignore_device = 1; return 0; } @@ -747,8 +919,13 @@ int udev_rules_get_name(struct udevice *udev, struct sysfs_class_device *class_d udev->ignore_remove = 1; dbg("remove event should be ignored"); } + if (rule->link_priority != 0) { + udev->link_priority = rule->link_priority; + info("link_priority=%i", udev->link_priority); + } /* apply all_partitions option only at a main block device */ - if (rule->partitions && udev->type == DEV_BLOCK && udev->kernel_number[0] == '\0') { + if (rule->partitions && + strcmp(udev->dev->subsystem, "block") == 0 && udev->dev->kernel_number[0] == '\0') { udev->partitions = rule->partitions; dbg("creation of partition nodes requested"); } @@ -758,85 +935,107 @@ int udev_rules_get_name(struct udevice *udev, struct sysfs_class_device *class_d if (rule->mode_operation == KEY_OP_ASSIGN_FINAL) udev->mode_final = 1; udev->mode = rule->mode; - dbg("applied mode=%#o to '%s'", udev->mode, udev->kernel_name); + dbg("applied mode=%#o to '%s'", rule->mode, udev->dev->kernel); } - if (!udev->owner_final && rule->owner[0] != '\0') { - if (rule->owner_operation == KEY_OP_ASSIGN_FINAL) + if (!udev->owner_final && rule->owner.operation != KEY_OP_UNSET) { + if (rule->owner.operation == KEY_OP_ASSIGN_FINAL) udev->owner_final = 1; - strlcpy(udev->owner, rule->owner, sizeof(udev->owner)); - apply_format(udev, udev->owner, sizeof(udev->owner), class_dev, sysfs_device); - dbg("applied owner='%s' to '%s'", udev->owner, udev->kernel_name); + strlcpy(udev->owner, key_val(rule, &rule->owner), sizeof(udev->owner)); + udev_rules_apply_format(udev, udev->owner, sizeof(udev->owner)); + dbg("applied owner='%s' to '%s'", udev->owner, udev->dev->kernel); } - if (!udev->group_final && rule->group[0] != '\0') { - if (rule->group_operation == KEY_OP_ASSIGN_FINAL) + if (!udev->group_final && rule->group.operation != KEY_OP_UNSET) { + if (rule->group.operation == KEY_OP_ASSIGN_FINAL) udev->group_final = 1; - strlcpy(udev->group, rule->group, sizeof(udev->group)); - apply_format(udev, udev->group, sizeof(udev->group), class_dev, sysfs_device); - dbg("applied group='%s' to '%s'", udev->group, udev->kernel_name); + strlcpy(udev->group, key_val(rule, &rule->group), sizeof(udev->group)); + udev_rules_apply_format(udev, udev->group, sizeof(udev->group)); + dbg("applied group='%s' to '%s'", udev->group, udev->dev->kernel); } /* collect symlinks */ - if (!udev->symlink_final && rule->symlink[0] != '\0') { + if (!udev->symlink_final && rule->symlink.operation != KEY_OP_UNSET) { char temp[PATH_SIZE]; char *pos, *next; + int count; - if (rule->symlink_operation == KEY_OP_ASSIGN_FINAL) + if (rule->symlink.operation == KEY_OP_ASSIGN_FINAL) udev->symlink_final = 1; - info("configured rule in '%s[%i]' applied, added symlink '%s'", - rule->config_file, rule->config_line, rule->symlink); - strlcpy(temp, rule->symlink, sizeof(temp)); - apply_format(udev, temp, sizeof(temp), class_dev, sysfs_device); + if (rule->symlink.operation == KEY_OP_ASSIGN || rule->symlink.operation == KEY_OP_ASSIGN_FINAL) { + info("reset symlink list"); + name_list_cleanup(&udev->symlink_list); + } + strlcpy(temp, key_val(rule, &rule->symlink), sizeof(temp)); + udev_rules_apply_format(udev, temp, sizeof(temp)); + count = replace_untrusted_chars(temp); + if (count) + info("%i untrusted character(s) replaced" , count); + dbg("rule applied, added symlink(s) '%s'", temp); /* add multiple symlinks separated by spaces */ pos = temp; - next = strchr(temp, ' '); + while (isspace(pos[0])) + pos++; + next = strchr(pos, ' '); while (next) { next[0] = '\0'; info("add symlink '%s'", pos); name_list_add(&udev->symlink_list, pos, 0); + while (isspace(next[1])) + next++; pos = &next[1]; next = strchr(pos, ' '); } - info("add symlink '%s'", pos); - name_list_add(&udev->symlink_list, pos, 0); + if (pos[0] != '\0') { + info("add symlink '%s'", pos); + name_list_add(&udev->symlink_list, pos, 0); + } } /* set name, later rules with name set will be ignored */ - if (rule->name[0] != '\0') { - info("configured rule in '%s[%i]' applied, '%s' becomes '%s'", - rule->config_file, rule->config_line, udev->kernel_name, rule->name); - - strlcpy(udev->name, rule->name, sizeof(udev->name)); - apply_format(udev, udev->name, sizeof(udev->name), class_dev, sysfs_device); - strlcpy(udev->config_file, rule->config_file, sizeof(udev->config_file)); - udev->config_line = rule->config_line; - - if (udev->type != DEV_NET) + if (rule->name.operation == KEY_OP_ASSIGN || + rule->name.operation == KEY_OP_ASSIGN_FINAL || + rule->name.operation == KEY_OP_ADD) { + int count; + + name_set = 1; + strlcpy(udev->name, key_val(rule, &rule->name), sizeof(udev->name)); + udev_rules_apply_format(udev, udev->name, sizeof(udev->name)); + count = replace_untrusted_chars(udev->name); + if (count) + info("%i untrusted character(s) replaced", count); + + info("rule applied, '%s' becomes '%s'", udev->dev->kernel, udev->name); + if (strcmp(udev->dev->subsystem, "net") != 0) dbg("name, '%s' is going to have owner='%s', group='%s', mode=%#o partitions=%i", udev->name, udev->owner, udev->group, udev->mode, udev->partitions); } - if (!udev->run_final && rule->run[0] != '\0') { - char program[PATH_SIZE]; - - if (rule->run_operation == KEY_OP_ASSIGN_FINAL) + if (!udev->run_final && rule->run.operation != KEY_OP_UNSET) { + if (rule->run.operation == KEY_OP_ASSIGN_FINAL) udev->run_final = 1; - strlcpy(program, rule->run, sizeof(program)); - apply_format(udev, program, sizeof(program), class_dev, sysfs_device); - dbg("add run '%s'", program); - name_list_add(&udev->run_list, program, 0); + if (rule->run.operation == KEY_OP_ASSIGN || rule->run.operation == KEY_OP_ASSIGN_FINAL) { + info("reset run list"); + name_list_cleanup(&udev->run_list); + } + dbg("add run '%s'", key_val(rule, &rule->run)); + name_list_add(&udev->run_list, key_val(rule, &rule->run), 0); } if (rule->last_rule) { dbg("last rule to be applied"); break; } + + if (rule->goto_label.operation != KEY_OP_UNSET) { + dbg("moving forward to label '%s'", key_val(rule, &rule->goto_label)); + udev_rules_iter_label(rules, key_val(rule, &rule->goto_label)); + } } } - if (udev->name[0] == '\0') { - strlcpy(udev->name, udev->kernel_name, sizeof(udev->name)); - info("no rule found, use kernel name '%s'", udev->name); + if (!name_set) { + strlcpy(udev->name, udev->dev->kernel, sizeof(udev->name)); + info("no node name set, will use kernel name '%s'", udev->name); } if (udev->tmp_node[0] != '\0') { @@ -848,113 +1047,53 @@ int udev_rules_get_name(struct udevice *udev, struct sysfs_class_device *class_d return 0; } -int udev_rules_get_run(struct udevice *udev) +int udev_rules_get_run(struct udev_rules *rules, struct udevice *udev) { struct udev_rule *rule; - char program[PATH_SIZE]; - /* look for a matching rule to apply */ - list_for_each_entry(rule, &udev_rule_list, node) { - dbg("process rule"); + dbg("udev->kernel='%s'", udev->dev->kernel); - if (rule->run[0] == '\0') - continue; + /* look for a matching rule to apply */ + udev_rules_iter_init(rules); + while (1) { + rule = udev_rules_iter_next(rules); + if (rule == NULL) + break; - if (rule->name[0] != '\0' || rule->symlink[0] != '\0' || - rule->mode != 0000 || rule->owner[0] != '\0' || rule->group[0] != '\0') { + dbg("process rule"); + if (rule->name.operation != KEY_OP_UNSET || rule->symlink.operation != KEY_OP_UNSET || + rule->mode_operation != KEY_OP_UNSET || rule->owner.operation != KEY_OP_UNSET || rule->group.operation != KEY_OP_UNSET) { dbg("skip rule that names a device"); continue; } - if (rule->action_operation != KEY_OP_UNSET) { - dbg("check for " KEY_ACTION " rule->action='%s' udev->action='%s'", - rule->action, udev->action); - if (strcmp_pattern(rule->action, udev->action) != 0) { - dbg(KEY_ACTION " is not matching"); - if (rule->action_operation != KEY_OP_NOMATCH) - continue; - } else { - dbg(KEY_ACTION " matches"); - if (rule->action_operation == KEY_OP_NOMATCH) - continue; + if (match_rule(udev, rule) == 0) { + if (rule->ignore_device) { + info("rule applied, '%s' is ignored", udev->dev->kernel); + udev->ignore_device = 1; + return 0; } - dbg(KEY_ACTION " key is true"); - } - if (rule->kernel_operation != KEY_OP_UNSET) { - dbg("check for " KEY_KERNEL " rule->kernel='%s' udev->kernel_name='%s'", - rule->kernel, udev->kernel_name); - if (strcmp_pattern(rule->kernel, udev->kernel_name) != 0) { - dbg(KEY_KERNEL " is not matching"); - if (rule->kernel_operation != KEY_OP_NOMATCH) - continue; - } else { - dbg(KEY_KERNEL " matches"); - if (rule->kernel_operation == KEY_OP_NOMATCH) - continue; + if (!udev->run_final && rule->run.operation != KEY_OP_UNSET) { + if (rule->run.operation == KEY_OP_ASSIGN || rule->run.operation == KEY_OP_ASSIGN_FINAL) { + info("reset run list"); + name_list_cleanup(&udev->run_list); + } + dbg("add run '%s'", key_val(rule, &rule->run)); + name_list_add(&udev->run_list, key_val(rule, &rule->run), 0); + if (rule->run.operation == KEY_OP_ASSIGN_FINAL) + break; } - dbg(KEY_KERNEL " key is true"); - } - if (rule->subsystem_operation != KEY_OP_UNSET) { - dbg("check for " KEY_SUBSYSTEM " rule->subsystem='%s' udev->subsystem='%s'", - rule->subsystem, udev->subsystem); - if (strcmp_pattern(rule->subsystem, udev->subsystem) != 0) { - dbg(KEY_SUBSYSTEM " is not matching"); - if (rule->subsystem_operation != KEY_OP_NOMATCH) - continue; - } else { - dbg(KEY_SUBSYSTEM " matches"); - if (rule->subsystem_operation == KEY_OP_NOMATCH) - continue; + if (rule->last_rule) { + dbg("last rule to be applied"); + break; } - dbg(KEY_SUBSYSTEM " key is true"); - } - if (rule->env_pair_count) { - int i; - - dbg("check for " KEY_ENV " pairs"); - for (i = 0; i < rule->env_pair_count; i++) { - struct key_pair *pair; - const char *value; - - pair = &rule->env_pair[i]; - value = getenv(pair->name); - if (!value) { - dbg(KEY_ENV "{'%s'} is not found", pair->name); - continue; - } - if (strcmp_pattern(pair->value, value) != 0) { - dbg(KEY_ENV "{'%s'} is not matching", pair->name); - if (pair->operation != KEY_OP_NOMATCH) - continue; - } else { - dbg(KEY_ENV "{'%s'} matches", pair->name); - if (pair->operation == KEY_OP_NOMATCH) - continue; - } + if (rule->goto_label.operation != KEY_OP_UNSET) { + dbg("moving forward to label '%s'", key_val(rule, &rule->goto_label)); + udev_rules_iter_label(rules, key_val(rule, &rule->goto_label)); } - dbg(KEY_ENV " key is true"); - } - - /* rule matches */ - - if (rule->ignore_device) { - info("configured rule in '%s[%i]' applied, '%s' is ignored", - rule->config_file, rule->config_line, udev->kernel_name); - udev->ignore_device = 1; - return 0; - } - - strlcpy(program, rule->run, sizeof(program)); - apply_format(udev, program, sizeof(program), NULL, NULL); - dbg("add run '%s'", program); - name_list_add(&udev->run_list, program, 0); - - if (rule->last_rule) { - dbg("last rule to be applied"); - break; } }