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=40c010c63f97447d24dfd1bb065bf4c9a17c8781;hb=68ab3e137b2ed017ca5d210dedfff702e21b25cf;hpb=4937afa402bf142429f0ac6dfc7e1bf8172faa62 diff --git a/udev_rules.c b/udev_rules.c index 40c010c63..5c3d7d5d0 100644 --- a/udev_rules.c +++ b/udev_rules.c @@ -1,21 +1,19 @@ /* - * udev_rules.c - * * 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. * */ @@ -28,18 +26,12 @@ #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" /* extract possible {attr} and move str behind it */ @@ -194,7 +186,13 @@ static int import_keys_into_env(struct udevice *udev, const char *buf, size_t bu linepos = line; if (get_key(&linepos, &variable, &value) == 0) { dbg("import '%s=%s'", variable, value); - name_list_key_add(&udev->env_list, 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); } } @@ -208,7 +206,7 @@ static int import_file_into_env(struct udevice *udev, const char *filename) size_t bufsize; if (file_map(filename, &buf, &bufsize) != 0) { - err("can't open '%s'", filename); + err("can't open '%s': %s", filename, strerror(errno)); return -1; } import_keys_into_env(udev, buf, bufsize); @@ -222,26 +220,29 @@ static int import_program_into_env(struct udevice *udev, const char *program) char result[1024]; size_t reslen; - if (run_program(program, udev->subsystem, result, sizeof(result), &reslen, (udev_log_priority >= LOG_DEBUG)) != 0) + 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, struct sysfs_class_device *class_dev, const char *filter) +static int import_parent_into_env(struct udevice *udev, const char *filter) { - struct sysfs_class_device *parent = sysfs_get_classdev_parent(class_dev); + struct sysfs_device *dev_parent; int rc = -1; - if (parent != NULL) { - struct udevice udev_parent; + 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", parent->path); - udev_init_device(&udev_parent, NULL, NULL, NULL); + 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, &parent->path[strlen(sysfs_path)]) == 0) { - dbg("import stored parent env '%s'", udev_parent.name); - list_for_each_entry(name_loop, &udev_parent.env_list, node) { + 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; @@ -250,7 +251,7 @@ static int import_parent_into_env(struct udevice *udev, struct sysfs_class_devic if (pos) { pos[0] = '\0'; pos++; - if (strcmp_pattern(filter, name) == 0) { + 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); @@ -261,121 +262,66 @@ static int import_parent_into_env(struct udevice *udev, struct sysfs_class_devic rc = 0; } else dbg("parent not found in database"); - udev_cleanup_device(&udev_parent); + udev_device_cleanup(udev_parent); } return rc; } -/* finds the lowest positive N such that N isn't present in the udevdb - * if doesn't exist, 0 is returned, N otherwise - */ -static int find_free_number(struct udevice *udev, const char *name) -{ - char devpath[PATH_SIZE]; - char filename[PATH_SIZE]; - int num = 0; - - strlcpy(filename, name, sizeof(filename)); - 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; - } - - num++; - if (num > 1000) { - info("find_free_number gone crazy (num=%d), aborted", num); - return -1; - } - snprintf(filename, sizeof(filename), "%s%d", name, num); - filename[sizeof(filename)-1] = '\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) -{ - struct sysfs_class_device *class_dev_parent; - struct sysfs_attribute *tmpattr; - - dbg("look for device attribute '%s'", name); - if (class_dev) { - dbg("look for class attribute '%s/%s'", class_dev->path, name); - tmpattr = sysfs_get_classdev_attr(class_dev, name); - if (tmpattr) - goto attr_found; - class_dev_parent = sysfs_get_classdev_parent(class_dev); - if (class_dev_parent) { - tmpattr = sysfs_get_classdev_attr(class_dev_parent, name); - if (tmpattr) - goto attr_found; - } - } - if (sysfs_device) { - dbg("look for devices attribute '%s/%s'", sysfs_device->path, name); - tmpattr = sysfs_get_device_attr(sysfs_device, name); - if (tmpattr) - goto attr_found; - } - return -1; - -attr_found: - strlcpy(value, tmpattr->value, len); - remove_trailing_char(value, '\n'); - - dbg("found attribute '%s'", tmpattr->path); - return 0; -} - -#define WAIT_LOOP_PER_SECOND 20 +#define WAIT_LOOP_PER_SECOND 50 static int wait_for_sysfs(struct udevice *udev, const char *file, int timeout) { - char filename[PATH_SIZE]; + char devicepath[PATH_SIZE]; + char filepath[PATH_SIZE]; struct stat stats; int loop = timeout * WAIT_LOOP_PER_SECOND; - snprintf(filename, sizeof(filename), "%s%s/%s", sysfs_path, udev->devpath, file); - filename[sizeof(filename)-1] = '\0'; - dbg("wait %i sec for '%s'", timeout, filename); + 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) { - if (stat(filename, &stats) == 0) { - dbg("file appeared after %i loops", (timeout * WAIT_LOOP_PER_SECOND) - loop-1); + /* 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); } - dbg("waiting for '%s' failed", filename); + err("waiting for '%s' failed", filepath); return -1; } -static void apply_format(struct udevice *udev, char *string, size_t maxsize, - struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device) +void udev_rules_apply_format(struct udevice *udev, char *string, size_t maxsize) { char temp[PATH_SIZE]; char temp2[PATH_SIZE]; char *head, *tail, *pos, *cpos, *attr, *rest; int len; int i; - unsigned int next_free_number; - struct sysfs_class_device *class_dev_parent; + int count; enum subst_type { SUBST_UNKNOWN, SUBST_DEVPATH, - SUBST_ID, + SUBST_KERNEL, SUBST_KERNEL_NUMBER, - SUBST_KERNEL_NAME, + SUBST_ID, SUBST_MAJOR, SUBST_MINOR, SUBST_RESULT, - SUBST_SYSFS, - SUBST_ENUM, + SUBST_ATTR, SUBST_PARENT, SUBST_TEMP_NODE, SUBST_ROOT, - SUBST_MODALIAS, SUBST_ENV, }; static const struct subst_map { @@ -383,21 +329,20 @@ static void apply_format(struct udevice *udev, char *string, size_t maxsize, char fmt; enum subst_type type; } map[] = { - { .name = "devpath", .fmt = 'p', .type = SUBST_DEVPATH }, - { .name = "id", .fmt = 'b', .type = SUBST_ID }, - { .name = "number", .fmt = 'n', .type = SUBST_KERNEL_NUMBER }, - { .name = "kernel", .fmt = 'k', .type = SUBST_KERNEL_NAME }, - { .name = "major", .fmt = 'M', .type = SUBST_MAJOR }, - { .name = "minor", .fmt = 'm', .type = SUBST_MINOR }, - { .name = "result", .fmt = 'c', .type = SUBST_RESULT }, - { .name = "sysfs", .fmt = 's', .type = SUBST_SYSFS }, - { .name = "enum", .fmt = 'e', .type = SUBST_ENUM }, - { .name = "parent", .fmt = 'P', .type = SUBST_PARENT }, - { .name = "tempnode", .fmt = 'N', .type = SUBST_TEMP_NODE }, - { .name = "root", .fmt = 'r', .type = SUBST_ROOT }, - { .name = "modalias", .fmt = 'A', .type = SUBST_MODALIAS }, - { .name = "env", .fmt = 'E', .type = SUBST_ENV }, - {} + { .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; @@ -425,8 +370,9 @@ static void apply_format(struct udevice *udev, char *string, size_t maxsize, goto found; } } - } - else if (head[0] == '%') { + head[0] = '$'; + err("unknown format variable '%s'", head); + } else if (head[0] == '%') { /* substitute format char */ if (head[1] == '\0') break; @@ -447,6 +393,8 @@ static void apply_format(struct udevice *udev, char *string, size_t maxsize, goto found; } } + head[0] = '%'; + err("unknown format char '%c'", tail[0]); } head++; } @@ -454,25 +402,26 @@ static void apply_format(struct udevice *udev, char *string, size_t maxsize, found: attr = get_format_attribute(&tail); strlcpy(temp, tail, sizeof(temp)); - dbg("format=%i, string='%s', tail='%s', class_dev=%p, sysfs_dev=%p", - type ,string, tail, class_dev, sysfs_device); + dbg("format=%i, string='%s', tail='%s'", type ,string, tail); switch (type) { case SUBST_DEVPATH: - strlcat(string, udev->devpath, maxsize); - dbg("substitute devpath '%s'", udev->devpath); + strlcat(string, udev->dev->devpath, maxsize); + dbg("substitute devpath '%s'", udev->dev->devpath); break; - case SUBST_ID: - strlcat(string, udev->bus_id, maxsize); - dbg("substitute bus_id '%s'", udev->bus_id); - break; - case SUBST_KERNEL_NAME: - strlcat(string, udev->kernel_name, maxsize); - dbg("substitute kernel name '%s'", udev->kernel_name); + case SUBST_KERNEL: + strlcat(string, udev->dev->kernel, maxsize); + dbg("substitute kernel name '%s'", udev->dev->kernel); break; case SUBST_KERNEL_NUMBER: - strlcat(string, udev->kernel_number, maxsize); - dbg("substitute kernel number '%s'", udev->kernel_number); + strlcat(string, udev->dev->kernel_number, maxsize); + dbg("substitute kernel number '%s'", udev->dev->kernel_number); + break; + 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 SUBST_MAJOR: sprintf(temp2, "%d", major(udev->devt)); @@ -518,65 +467,77 @@ found: dbg("substitute result string '%s'", udev->program_result); } break; - case SUBST_SYSFS: - 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 SUBST_ENUM: - 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 SUBST_PARENT: - 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); + { + 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 SUBST_TEMP_NODE: - if (udev->tmp_node[0] == '\0') { + 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); @@ -585,12 +546,6 @@ found: strlcat(string, udev_root, maxsize); dbg("substitute udev_root '%s'", udev_root); break; - case SUBST_MODALIAS: - if (find_sysfs_attribute(NULL, sysfs_device, "modalias", temp2, sizeof(temp2)) != 0) - break; - strlcat(string, temp2, maxsize); - dbg("substitute MODALIAS '%s'", temp2); - break; case SUBST_ENV: if (attr == NULL) { dbg("missing attribute"); @@ -598,7 +553,7 @@ found: } pos = getenv(attr); if (pos == NULL) { - dbg("env '%s' not avialable", attr); + dbg("env '%s' not available", attr); break; } dbg("substitute env '%s=%s'", attr, pos); @@ -609,7 +564,7 @@ found: break; } /* possibly truncate to format-char specified length */ - if (len != -1) { + if (len >= 0 && len < (int)strlen(head)) { head[len] = '\0'; dbg("truncate to %i chars, subtitution string becomes '%s'", len, head); } @@ -629,17 +584,18 @@ static char *key_pair_name(struct udev_rule *rule, struct key_pair *pair) static int match_key(const char *key_name, struct udev_rule *rule, struct key *key, const char *val) { - int match; char value[PATH_SIZE]; char *key_value; char *pos; + int match = 0; - if (key->operation == KEY_OP_UNSET) + 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, '|'); @@ -647,251 +603,294 @@ static int match_key(const char *key_name, struct udev_rule *rule, struct key *k pos[0] = '\0'; pos++; } + dbg("match %s '%s' <-> '%s'", key_name, key_value, val); - match = (strcmp_pattern(key_value, val) == 0); - if (match && (key->operation != KEY_OP_NOMATCH)) { - 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; - } + match = (fnmatch(key_value, val, 0) == 0); + if (match) + break; + key_value = pos; } - dbg("%s is false", key_name); + + 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; } -static int match_rule(struct udevice *udev, struct udev_rule *rule, - struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device) +/* match a single rule against a given device and possibly its parent devices */ +static int match_rule(struct udevice *udev, struct udev_rule *rule) { - struct sysfs_device *parent_device = sysfs_device; + int i; if (match_key("ACTION", rule, &rule->action, udev->action)) - goto exit; + goto nomatch; - if (match_key("KERNEL", rule, &rule->kernel_name, udev->kernel_name)) - goto exit; + if (match_key("KERNEL", rule, &rule->kernel, udev->dev->kernel)) + goto nomatch; - if (match_key("SUBSYSTEM", rule, &rule->subsystem, udev->subsystem)) - goto exit; + if (match_key("SUBSYSTEM", rule, &rule->subsystem, udev->dev->subsystem)) + goto nomatch; - if (match_key("DEVPATH", rule, &rule->devpath, udev->devpath)) - goto exit; + if (match_key("DEVPATH", rule, &rule->devpath, udev->dev->devpath)) + goto nomatch; - if (rule->modalias.operation != KEY_OP_UNSET) { - char value[NAME_SIZE]; + if (match_key("DRIVER", rule, &rule->driver, udev->dev->driver)) + goto nomatch; - if (find_sysfs_attribute(NULL, sysfs_device, "modalias", value, sizeof(value)) != 0) { - dbg("MODALIAS value not found"); - goto exit; - } - if (match_key("MODALIAS", rule, &rule->modalias, value)) - goto exit; - } + /* match NAME against a value assigned by an earlier rule */ + if (match_key("NAME", rule, &rule->name, udev->name)) + goto nomatch; - if (rule->env.count) { - int i; + for (i = 0; i < rule->env.count; i++) { + struct key_pair *pair = &rule->env.keys[i]; - dbg("check %i ENV keys", rule->env.count); - for (i = 0; i < rule->env.count; i++) { - struct key_pair *pair = &rule->env.keys[i]; + /* 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", key_name); + dbg("ENV{'%s'} is not set, treat as empty", key_name); value = ""; } if (match_key("ENV", rule, &pair->key, value)) - goto exit; + goto nomatch; } - dbg("all %i ENV keys matched", rule->env.count); } if (rule->wait_for_sysfs.operation != KEY_OP_UNSET) { - int match; + int found; - match = (wait_for_sysfs(udev, key_val(rule, &rule->wait_for_sysfs), 3) == 0); - if (match && (rule->wait_for_sysfs.operation != KEY_OP_NOMATCH)) { - dbg("WAIT_FOR_SYSFS is true (matching value)"); - return 0; - } - if (!match && (rule->wait_for_sysfs.operation == KEY_OP_NOMATCH)) { - dbg("WAIT_FOR_SYSFS is true, (non matching value)"); - return 0; - } - dbg("WAIT_FOR_SYSFS is false"); - return -1; + 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; } - /* walk up the chain of physical devices and find a match */ - 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; - } - if (match_key("DRIVER", rule, &rule->driver, parent_device->driver_name)) - goto try_parent; - } + /* check for matching sysfs attribute pairs */ + for (i = 0; i < rule->attr.count; i++) { + struct key_pair *pair = &rule->attr.keys[i]; - /* check for matching bus value */ - if (rule->bus.operation != KEY_OP_UNSET) { - if (parent_device == NULL) { - dbg("device has no sysfs_device"); - goto exit; + 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; + + 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("BUS", rule, &rule->bus, parent_device->bus)) - 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; - } - if (match_key("ID", rule, &rule->id, parent_device->bus_id)) - goto try_parent; + if (match_key("ATTR", rule, &pair->key, val)) + goto nomatch; } + } + + /* walk up the chain of parent devices and find a match */ + udev->dev_parent = udev->dev; + while (1) { + /* check for matching kernel device name */ + if (match_key("KERNELS", rule, &rule->kernels, udev->dev_parent->kernel)) + goto try_parent; + + /* check for matching subsystem value */ + if (match_key("SUBSYSTEMS", rule, &rule->subsystems, udev->dev_parent->subsystem)) + goto try_parent; - /* check for matching sysfs pairs */ - if (rule->sysfs.count) { - int i; + /* check for matching driver */ + if (match_key("DRIVERS", rule, &rule->drivers, udev->dev_parent->driver)) + goto try_parent; - dbg("check %i SYSFS keys", rule->sysfs.count); - for (i = 0; i < rule->sysfs.count; i++) { - struct key_pair *pair = &rule->sysfs.keys[i]; + /* check for matching sysfs attribute pairs */ + for (i = 0; i < rule->attrs.count; i++) { + struct key_pair *pair = &rule->attrs.keys[i]; + + 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); - char value[VALUE_SIZE]; + const char *value; + char val[VALUE_SIZE]; size_t len; - if (find_sysfs_attribute(class_dev, parent_device, key_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(key_value); - if (len && !isspace(key_value[len-1])) { - len = strlen(value); - while (len > 0 && isspace(value[len-1])) - value[--len] = '\0'; - dbg("removed %zi trailing whitespace chars from '%s'", strlen(value)-len, 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("SYSFS", rule, &pair->key, value)) + if (match_key("ATTRS", rule, &pair->key, val)) goto try_parent; } - dbg("all %i SYSFS keys matched", rule->sysfs.count); } - /* 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) { + char program[PATH_SIZE]; + 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 { + 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("PROGRAM key is true"); } - /* import variables from file into environment */ + /* check for matching result of external program */ + 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)); - apply_format(udev, import, sizeof(import), class_dev, sysfs_device); + udev_rules_apply_format(udev, import, sizeof(import)); dbg("check for IMPORT import='%s'", import); if (rule->import_type == IMPORT_PROGRAM) { - info("IMPORT executes '%s'", import); 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 && class_dev) { + } else if (rule->import_type == IMPORT_PARENT) { dbg("import parent import='%s'", import); - rc = import_parent_into_env(udev, class_dev, import); + rc = import_parent_into_env(udev, import); } - if (rc) { + if (rc != 0) { dbg("IMPORT failed"); if (rule->import.operation != KEY_OP_NOMATCH) - goto exit; + goto nomatch; } else dbg("IMPORT '%s' imported", key_val(rule, &rule->import)); dbg("IMPORT key is true"); } - /* execute external program */ - if (rule->program.operation != KEY_OP_UNSET) { - char program[PATH_SIZE]; - char result[PATH_SIZE]; + /* 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]; - strlcpy(program, key_val(rule, &rule->program), sizeof(program)); - apply_format(udev, program, sizeof(program), class_dev, sysfs_device); - info("PROGRAM key executes '%s", program); - if (run_program(program, udev->subsystem, result, sizeof(result), NULL, (udev_log_priority >= LOG_DEBUG)) != 0) { - dbg("PROGRAM is false"); - udev->program_result[0] = '\0'; - if (rule->program.operation != KEY_OP_NOMATCH) - goto exit; - } else { - dbg("PROGRAM matches"); - remove_trailing_char(result, '\n'); - replace_untrusted_chars(result); - 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 exit; + 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("PROGRAM key is true"); } - /* check for matching result of external program */ - if (match_key("RESULT", rule, &rule->result, udev->program_result)) - goto exit; + /* 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]; - /* rule matches */ + 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 udev_rules *rules, 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); - } - - 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)); - } - - dbg("udev->kernel_name='%s'", udev->kernel_name); + dbg("udev->dev->devpath='%s'", udev->dev->devpath); + dbg("udev->dev->kernel='%s'", udev->dev->kernel); /* look for a matching rule to apply */ udev_rules_iter_init(rules); @@ -900,16 +899,19 @@ int udev_rules_get_name(struct udev_rules *rules, struct udevice *udev, struct s if (rule == NULL) break; - if (name_set && rule->name.operation != KEY_OP_UNSET) { + 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; } dbg("process rule"); - if (match_rule(udev, rule, class_dev, sysfs_device) == 0) { + if (match_rule(udev, rule) == 0) { /* apply options */ if (rule->ignore_device) { - info("rule applied, '%s' is ignored", udev->kernel_name); + info("rule applied, '%s' is ignored", udev->dev->kernel); udev->ignore_device = 1; return 0; } @@ -917,8 +919,13 @@ int udev_rules_get_name(struct udev_rules *rules, struct udevice *udev, struct s 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"); } @@ -928,43 +935,41 @@ int udev_rules_get_name(struct udev_rules *rules, struct udevice *udev, struct s if (rule->mode_operation == KEY_OP_ASSIGN_FINAL) udev->mode_final = 1; udev->mode = rule->mode; - dbg("applied mode=%#o to '%s'", rule->mode, udev->kernel_name); + dbg("applied mode=%#o to '%s'", rule->mode, udev->dev->kernel); } 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, key_val(rule, &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); + 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.operation != KEY_OP_UNSET) { if (rule->group.operation == KEY_OP_ASSIGN_FINAL) udev->group_final = 1; strlcpy(udev->group, key_val(rule, &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); + 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.operation != KEY_OP_UNSET) { char temp[PATH_SIZE]; char *pos, *next; + int count; if (rule->symlink.operation == KEY_OP_ASSIGN_FINAL) udev->symlink_final = 1; if (rule->symlink.operation == KEY_OP_ASSIGN || rule->symlink.operation == KEY_OP_ASSIGN_FINAL) { - struct name_entry *name_loop; - struct name_entry *temp_loop; - info("reset symlink list"); - list_for_each_entry_safe(name_loop, temp_loop, &udev->symlink_list, node) { - list_del(&name_loop->node); - free(name_loop); - } + name_list_cleanup(&udev->symlink_list); } strlcpy(temp, key_val(rule, &rule->symlink), sizeof(temp)); - apply_format(udev, temp, sizeof(temp), class_dev, sysfs_device); - info("rule applied, added symlink '%s'", 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; @@ -987,36 +992,33 @@ int udev_rules_get_name(struct udev_rules *rules, struct udevice *udev, struct s } /* set name, later rules with name set will be ignored */ - if (rule->name.operation != KEY_OP_UNSET) { + 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)); - apply_format(udev, udev->name, sizeof(udev->name), class_dev, sysfs_device); + 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->kernel_name, udev->name); - if (udev->type != DEV_NET) + 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.operation != KEY_OP_UNSET) { - char program[PATH_SIZE]; - if (rule->run.operation == KEY_OP_ASSIGN_FINAL) udev->run_final = 1; if (rule->run.operation == KEY_OP_ASSIGN || rule->run.operation == KEY_OP_ASSIGN_FINAL) { - struct name_entry *name_loop; - struct name_entry *temp_loop; - info("reset run list"); - list_for_each_entry_safe(name_loop, temp_loop, &udev->run_list, node) { - list_del(&name_loop->node); - free(name_loop); - } + name_list_cleanup(&udev->run_list); } - strlcpy(program, key_val(rule, &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); + 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) { @@ -1032,7 +1034,7 @@ int udev_rules_get_name(struct udev_rules *rules, struct udevice *udev, struct s } if (!name_set) { - strlcpy(udev->name, udev->kernel_name, sizeof(udev->name)); + strlcpy(udev->name, udev->dev->kernel, sizeof(udev->name)); info("no node name set, will use kernel name '%s'", udev->name); } @@ -1045,20 +1047,11 @@ int udev_rules_get_name(struct udev_rules *rules, struct udevice *udev, struct s return 0; } -int udev_rules_get_run(struct udev_rules *rules, struct udevice *udev, - struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_dev) +int udev_rules_get_run(struct udev_rules *rules, struct udevice *udev) { struct udev_rule *rule; - if (class_dev && !sysfs_dev) - sysfs_dev = sysfs_get_classdev_device(class_dev); - if (sysfs_dev) { - dbg("found devices device: path='%s', bus_id='%s', bus='%s'", - sysfs_dev->path, sysfs_dev->bus_id, sysfs_dev->bus); - strlcpy(udev->bus_id, sysfs_dev->bus_id, sizeof(udev->bus_id)); - } - - dbg("udev->kernel_name='%s'", udev->kernel_name); + dbg("udev->kernel='%s'", udev->dev->kernel); /* look for a matching rule to apply */ udev_rules_iter_init(rules); @@ -1074,30 +1067,20 @@ int udev_rules_get_run(struct udev_rules *rules, struct udevice *udev, continue; } - if (match_rule(udev, rule, class_dev, sysfs_dev) == 0) { + if (match_rule(udev, rule) == 0) { if (rule->ignore_device) { - info("rule applied, '%s' is ignored", udev->kernel_name); + info("rule applied, '%s' is ignored", udev->dev->kernel); udev->ignore_device = 1; return 0; } if (!udev->run_final && rule->run.operation != KEY_OP_UNSET) { - char program[PATH_SIZE]; - if (rule->run.operation == KEY_OP_ASSIGN || rule->run.operation == KEY_OP_ASSIGN_FINAL) { - struct name_entry *name_loop; - struct name_entry *temp_loop; - info("reset run list"); - list_for_each_entry_safe(name_loop, temp_loop, &udev->run_list, node) { - list_del(&name_loop->node); - free(name_loop); - } + name_list_cleanup(&udev->run_list); } - strlcpy(program, key_val(rule, &rule->run), sizeof(program)); - apply_format(udev, program, sizeof(program), class_dev, sysfs_dev); - dbg("add run '%s'", program); - name_list_add(&udev->run_list, program, 0); + 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; }