diff options
Diffstat (limited to 'udev/udev_rules.c')
| -rw-r--r-- | udev/udev_rules.c | 1618 |
1 files changed, 1618 insertions, 0 deletions
diff --git a/udev/udev_rules.c b/udev/udev_rules.c new file mode 100644 index 0000000000..ea850a84c3 --- /dev/null +++ b/udev/udev_rules.c @@ -0,0 +1,1618 @@ +/* + * Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com> + * Copyright (C) 2003-2006 Kay Sievers <kay.sievers@vrfy.org> + * + * 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., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + */ + +#include <stddef.h> +#include <stdlib.h> +#include <string.h> +#include <stdio.h> +#include <fcntl.h> +#include <ctype.h> +#include <unistd.h> +#include <errno.h> +#include <syslog.h> +#include <dirent.h> +#include <fnmatch.h> +#include <sys/socket.h> +#include <sys/un.h> +#include <sys/wait.h> +#include <sys/stat.h> + +#include "udev.h" +#include "udev_rules.h" +#include "udev_selinux.h" + +extern char **environ; + +/* extract possible {attr} and move str behind it */ +static char *get_format_attribute(char **str) +{ + char *pos; + char *attr = NULL; + + if (*str[0] == '{') { + pos = strchr(*str, '}'); + if (pos == NULL) { + err("missing closing brace for format\n"); + return NULL; + } + pos[0] = '\0'; + attr = *str+1; + *str = pos+1; + dbg("attribute='%s', str='%s'\n", attr, *str); + } + return attr; +} + +/* extract possible format length and move str behind it*/ +static int get_format_len(char **str) +{ + int num; + char *tail; + + if (isdigit(*str[0])) { + num = (int) strtoul(*str, &tail, 10); + if (num > 0) { + *str = tail; + dbg("format length=%i\n", num); + return num; + } else { + err("format parsing error '%s'\n", *str); + } + } + return -1; +} + +static int get_key(char **line, char **key, char **value) +{ + char *linepos; + char *temp; + + linepos = *line; + if (linepos == NULL) + return -1; + + /* skip whitespace */ + while (isspace(linepos[0])) + linepos++; + + /* get the key */ + temp = strchr(linepos, '='); + if (temp == NULL || temp == linepos) + return -1; + temp[0] = '\0'; + *key = linepos; + linepos = &temp[1]; + + /* get a quoted value */ + if (linepos[0] == '"' || linepos[0] == '\'') { + temp = strchr(&linepos[1], linepos[0]); + if (temp != NULL) { + temp[0] = '\0'; + *value = &linepos[1]; + goto out; + } + } + + /* get the value*/ + temp = strchr(linepos, '\n'); + if (temp != NULL) + temp[0] = '\0'; + *value = linepos; +out: + return 0; +} + +static int run_program(const char *command, const char *subsystem, + char *result, size_t ressize, size_t *reslen) +{ + int status; + int outpipe[2] = {-1, -1}; + int errpipe[2] = {-1, -1}; + pid_t pid; + char arg[PATH_SIZE]; + char program[PATH_SIZE]; + char *argv[(sizeof(arg) / 2) + 1]; + int devnull; + int i; + int retval = 0; + + /* build argv from comand */ + strlcpy(arg, command, sizeof(arg)); + i = 0; + if (strchr(arg, ' ') != NULL) { + char *pos = arg; + + while (pos != NULL) { + if (pos[0] == '\'') { + /* don't separate if in apostrophes */ + pos++; + argv[i] = strsep(&pos, "\'"); + while (pos != NULL && pos[0] == ' ') + pos++; + } else { + argv[i] = strsep(&pos, " "); + } + dbg("arg[%i] '%s'\n", i, argv[i]); + i++; + } + argv[i] = NULL; + } else { + argv[0] = arg; + argv[1] = NULL; + } + info("'%s'\n", command); + + /* prepare pipes from child to parent */ + if (result != NULL || udev_log_priority >= LOG_INFO) { + if (pipe(outpipe) != 0) { + err("pipe failed: %s\n", strerror(errno)); + return -1; + } + } + if (udev_log_priority >= LOG_INFO) { + if (pipe(errpipe) != 0) { + err("pipe failed: %s\n", strerror(errno)); + return -1; + } + } + + /* allow programs in /lib/udev called without the path */ + if (strchr(argv[0], '/') == NULL) { + strlcpy(program, "/lib/udev/", sizeof(program)); + strlcat(program, argv[0], sizeof(program)); + argv[0] = program; + } + + pid = fork(); + switch(pid) { + case 0: + /* child closes parent ends of pipes */ + if (outpipe[READ_END] > 0) + close(outpipe[READ_END]); + if (errpipe[READ_END] > 0) + close(errpipe[READ_END]); + + /* discard child output or connect to pipe */ + devnull = open("/dev/null", O_RDWR); + if (devnull > 0) { + dup2(devnull, STDIN_FILENO); + if (outpipe[WRITE_END] < 0) + dup2(devnull, STDOUT_FILENO); + if (errpipe[WRITE_END] < 0) + dup2(devnull, STDERR_FILENO); + close(devnull); + } else + err("open /dev/null failed: %s\n", strerror(errno)); + if (outpipe[WRITE_END] > 0) { + dup2(outpipe[WRITE_END], STDOUT_FILENO); + close(outpipe[WRITE_END]); + } + if (errpipe[WRITE_END] > 0) { + dup2(errpipe[WRITE_END], STDERR_FILENO); + close(errpipe[WRITE_END]); + } + execv(argv[0], argv); + if (errno == ENOENT || errno == ENOTDIR) { + /* may be on a filesytem which is not mounted right now */ + info("program '%s' not found\n", argv[0]); + } else { + /* other problems */ + err("exec of program '%s' failed\n", argv[0]); + } + _exit(1); + case -1: + err("fork of '%s' failed: %s\n", argv[0], strerror(errno)); + return -1; + default: + /* read from child if requested */ + if (outpipe[READ_END] > 0 || errpipe[READ_END] > 0) { + ssize_t count; + size_t respos = 0; + + /* parent closes child ends of pipes */ + if (outpipe[WRITE_END] > 0) + close(outpipe[WRITE_END]); + if (errpipe[WRITE_END] > 0) + close(errpipe[WRITE_END]); + + /* read child output */ + while (outpipe[READ_END] > 0 || errpipe[READ_END] > 0) { + int fdcount; + fd_set readfds; + + FD_ZERO(&readfds); + if (outpipe[READ_END] > 0) + FD_SET(outpipe[READ_END], &readfds); + if (errpipe[READ_END] > 0) + FD_SET(errpipe[READ_END], &readfds); + fdcount = select(UDEV_MAX(outpipe[READ_END], errpipe[READ_END])+1, &readfds, NULL, NULL, NULL); + if (fdcount < 0) { + if (errno == EINTR) + continue; + retval = -1; + break; + } + + /* get stdout */ + if (outpipe[READ_END] > 0 && FD_ISSET(outpipe[READ_END], &readfds)) { + char inbuf[1024]; + char *pos; + char *line; + + count = read(outpipe[READ_END], inbuf, sizeof(inbuf)-1); + if (count <= 0) { + close(outpipe[READ_END]); + outpipe[READ_END] = -1; + if (count < 0) { + err("stdin read failed: %s\n", strerror(errno)); + retval = -1; + } + continue; + } + inbuf[count] = '\0'; + + /* store result for rule processing */ + if (result) { + if (respos + count < ressize) { + memcpy(&result[respos], inbuf, count); + respos += count; + } else { + err("ressize %ld too short\n", (long)ressize); + retval = -1; + } + } + pos = inbuf; + while ((line = strsep(&pos, "\n"))) + if (pos || line[0] != '\0') + info("'%s' (stdout) '%s'\n", argv[0], line); + } + + /* get stderr */ + if (errpipe[READ_END] > 0 && FD_ISSET(errpipe[READ_END], &readfds)) { + char errbuf[1024]; + char *pos; + char *line; + + count = read(errpipe[READ_END], errbuf, sizeof(errbuf)-1); + if (count <= 0) { + close(errpipe[READ_END]); + errpipe[READ_END] = -1; + if (count < 0) + err("stderr read failed: %s\n", strerror(errno)); + continue; + } + errbuf[count] = '\0'; + pos = errbuf; + while ((line = strsep(&pos, "\n"))) + if (pos || line[0] != '\0') + info("'%s' (stderr) '%s'\n", argv[0], line); + } + } + if (outpipe[READ_END] > 0) + close(outpipe[READ_END]); + if (errpipe[READ_END] > 0) + close(errpipe[READ_END]); + + /* return the childs stdout string */ + if (result) { + result[respos] = '\0'; + dbg("result='%s'\n", result); + if (reslen) + *reslen = respos; + } + } + waitpid(pid, &status, 0); + if (WIFEXITED(status)) { + info("'%s' returned with status %i\n", argv[0], WEXITSTATUS(status)); + if (WEXITSTATUS(status) != 0) + retval = -1; + } else { + err("'%s' abnormal exit\n", argv[0]); + retval = -1; + } + } + + return retval; +} + +static int import_keys_into_env(struct udevice *udev, const char *buf, size_t bufsize) +{ + 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++; + + /* 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; + + if (count >= sizeof(line)) { + err("line too long, conf line skipped %s, line %d\n", udev_config_filename, lineno); + continue; + } + + memcpy(line, bufline, count); + line[count] = '\0'; + + linepos = line; + if (get_key(&linepos, &variable, &value) == 0) { + dbg("import '%s=%s'\n", variable, value); + + /* handle device, renamed by external tool, returning new path */ + if (strcmp(variable, "DEVPATH") == 0) { + info("updating devpath from '%s' to '%s'\n", 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 0; +} + +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\n", filename, strerror(errno)); + return -1; + } + import_keys_into_env(udev, buf, bufsize); + file_unmap(buf, bufsize); + + return 0; +} + +static int import_program_into_env(struct udevice *udev, const char *program) +{ + char result[2048]; + size_t reslen; + + if (run_program(program, udev->dev->subsystem, result, sizeof(result), &reslen) != 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\n", 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'\n", 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'\n", name_loop->name); + name_list_add(&udev->env_list, name_loop->name, 0); + setenv(name, pos, 1); + } else + dbg("skip key '%s'\n", name_loop->name); + } + } + rc = 0; + } else + dbg("parent not found in database\n"); + udev_device_cleanup(udev_parent); + } + + return rc; +} + +static int pass_env_to_socket(const char *sockpath, const char *devpath, const char *action) +{ + int sock; + struct sockaddr_un saddr; + socklen_t saddrlen; + struct stat stats; + char buf[2048]; + size_t bufpos = 0; + int i; + ssize_t count; + int retval = 0; + + dbg("pass environment to socket '%s'\n", sockpath); + sock = socket(AF_LOCAL, SOCK_DGRAM, 0); + memset(&saddr, 0x00, sizeof(struct sockaddr_un)); + saddr.sun_family = AF_LOCAL; + if (sockpath[0] == '@') { + /* abstract namespace socket requested */ + strlcpy(&saddr.sun_path[1], &sockpath[1], sizeof(saddr.sun_path)-1); + saddrlen = offsetof(struct sockaddr_un, sun_path) + 1 + strlen(&saddr.sun_path[1]); + } else if (stat(sockpath, &stats) == 0 && S_ISSOCK(stats.st_mode)) { + /* existing socket file */ + strlcpy(saddr.sun_path, sockpath, sizeof(saddr.sun_path)); + saddrlen = offsetof(struct sockaddr_un, sun_path) + strlen(saddr.sun_path); + } else { + /* no socket file, assume abstract namespace socket */ + strlcpy(&saddr.sun_path[1], sockpath, sizeof(saddr.sun_path)-1); + saddrlen = offsetof(struct sockaddr_un, sun_path) + 1 + strlen(&saddr.sun_path[1]); + } + + bufpos = snprintf(buf, sizeof(buf)-1, "%s@%s", action, devpath); + bufpos++; + for (i = 0; environ[i] != NULL && bufpos < (sizeof(buf)-1); i++) { + bufpos += strlcpy(&buf[bufpos], environ[i], sizeof(buf) - bufpos-1); + bufpos++; + } + if (bufpos > sizeof(buf)) + bufpos = sizeof(buf); + + count = sendto(sock, &buf, bufpos, 0, (struct sockaddr *)&saddr, saddrlen); + if (count < 0) + retval = -1; + info("passed %zi bytes to socket '%s', \n", count, sockpath); + + close(sock); + return retval; +} + +int udev_rules_run(struct udevice *udev) +{ + struct name_entry *name_loop; + int retval = 0; + + dbg("executing run list\n"); + list_for_each_entry(name_loop, &udev->run_list, node) { + if (strncmp(name_loop->name, "socket:", strlen("socket:")) == 0) { + pass_env_to_socket(&name_loop->name[strlen("socket:")], udev->dev->devpath, udev->action); + } else { + char program[PATH_SIZE]; + + strlcpy(program, name_loop->name, sizeof(program)); + udev_rules_apply_format(udev, program, sizeof(program)); + if (run_program(program, udev->dev->subsystem, NULL, 0, NULL) != 0) + if (!name_loop->ignore_error) + retval = -1; + } + } + + return retval; +} + +#define WAIT_LOOP_PER_SECOND 50 +static int wait_for_file(struct udevice *udev, const char *file, int timeout) +{ + char filepath[PATH_SIZE]; + char devicepath[PATH_SIZE] = ""; + struct stat stats; + int loop = timeout * WAIT_LOOP_PER_SECOND; + + /* a relative path is a device attribute */ + if (file[0] != '/') { + 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)); + file = filepath; + } + + dbg("will wait %i sec for '%s'\n", timeout, file); + while (--loop) { + /* lookup file */ + if (stat(file, &stats) == 0) { + info("file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1); + return 0; + } + /* make sure, the device did not disappear in the meantime */ + if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) { + info("device disappeared while waiting for '%s'\n", file); + return -2; + } + info("wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND); + usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND); + } + info("waiting for '%s' failed\n", file); + return -1; +} + +/* handle "[$SUBSYSTEM/$KERNEL]<attribute>" lookup */ +static int attr_get_by_subsys_id(const char *attrstr, char *devpath, size_t len, char **attr) +{ + char subsys[NAME_SIZE]; + char *attrib; + char *id; + int found = 0; + + if (attrstr[0] != '[') + goto out; + + strlcpy(subsys, &attrstr[1], sizeof(subsys)); + + attrib = strchr(subsys, ']'); + if (attrib == NULL) + goto out; + attrib[0] = '\0'; + attrib = &attrib[1]; + + id = strchr(subsys, '/'); + if (id == NULL) + goto out; + id[0] = '\0'; + id = &id[1]; + + if (sysfs_lookup_devpath_by_subsys_id(devpath, len, subsys, id)) { + if (attr != NULL) { + if (attrib[0] != '\0') + *attr = attrib; + else + *attr = NULL; + } + found = 1; + } +out: + return found; +} + +static int attr_subst_subdir(char *attr, size_t len) +{ + char *pos; + int found = 0; + + pos = strstr(attr, "/*/"); + if (pos != NULL) { + char str[PATH_SIZE]; + DIR *dir; + + pos[1] = '\0'; + strlcpy(str, &pos[2], sizeof(str)); + dir = opendir(attr); + if (dir != NULL) { + struct dirent *dent; + + for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { + struct stat stats; + + if (dent->d_name[0] == '.') + continue; + strlcat(attr, dent->d_name, len); + strlcat(attr, str, len); + if (stat(attr, &stats) == 0) { + found = 1; + break; + } + pos[1] = '\0'; + } + closedir(dir); + } + if (!found) + strlcat(attr, str, len); + } + + return found; +} + +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; + int count; + enum subst_type { + SUBST_UNKNOWN, + SUBST_DEVPATH, + SUBST_KERNEL, + SUBST_KERNEL_NUMBER, + SUBST_ID, + SUBST_DRIVER, + SUBST_MAJOR, + SUBST_MINOR, + SUBST_RESULT, + SUBST_ATTR, + SUBST_PARENT, + SUBST_TEMP_NODE, + SUBST_NAME, + SUBST_LINKS, + SUBST_ROOT, + SUBST_SYS, + 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 = "driver", .fmt = 'd', .type = SUBST_DRIVER }, + { .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 = "name", .fmt = 'D', .type = SUBST_NAME }, + { .name = "links", .fmt = 'L', .type = SUBST_LINKS }, + { .name = "root", .fmt = 'r', .type = SUBST_ROOT }, + { .name = "sys", .fmt = 'S', .type = SUBST_SYS }, + { .name = "env", .fmt = 'E', .type = SUBST_ENV }, + { NULL, '\0', 0 } + }; + enum subst_type type; + const struct subst_map *subst; + + head = string; + while (1) { + 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'\n", subst->name); + goto found; + } + } + head[0] = '$'; + err("unknown format variable '%s'\n", 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'\n", subst->fmt); + goto found; + } + } + head[0] = '%'; + err("unknown format char '%c'\n", tail[0]); + } + head++; + } + break; +found: + attr = get_format_attribute(&tail); + strlcpy(temp, tail, sizeof(temp)); + dbg("format=%i, string='%s', tail='%s'\n", type ,string, tail); + + switch (type) { + case SUBST_DEVPATH: + strlcat(string, udev->dev->devpath, maxsize); + dbg("substitute devpath '%s'\n", udev->dev->devpath); + break; + case SUBST_KERNEL: + strlcat(string, udev->dev->kernel, maxsize); + dbg("substitute kernel name '%s'\n", udev->dev->kernel); + break; + case SUBST_KERNEL_NUMBER: + strlcat(string, udev->dev->kernel_number, maxsize); + dbg("substitute kernel number '%s'\n", udev->dev->kernel_number); + break; + case SUBST_ID: + if (udev->dev_parent != NULL) { + strlcat(string, udev->dev_parent->kernel, maxsize); + dbg("substitute id '%s'\n", udev->dev_parent->kernel); + } + break; + case SUBST_DRIVER: + if (udev->dev_parent != NULL) { + strlcat(string, udev->dev_parent->driver, maxsize); + dbg("substitute driver '%s'\n", udev->dev_parent->driver); + } + break; + case SUBST_MAJOR: + sprintf(temp2, "%d", major(udev->devt)); + strlcat(string, temp2, maxsize); + dbg("substitute major number '%s'\n", temp2); + break; + case SUBST_MINOR: + sprintf(temp2, "%d", minor(udev->devt)); + strlcat(string, temp2, maxsize); + dbg("substitute minor number '%s'\n", temp2); + break; + case SUBST_RESULT: + if (udev->program_result[0] == '\0') + break; + /* get part part of the result string */ + i = 0; + if (attr != NULL) + i = strtoul(attr, &rest, 10); + if (i > 0) { + dbg("request part #%d of result string\n", i); + cpos = udev->program_result; + while (--i) { + while (cpos[0] != '\0' && !isspace(cpos[0])) + cpos++; + while (isspace(cpos[0])) + cpos++; + } + if (i > 0) { + err("requested part of result string not found\n"); + break; + } + strlcpy(temp2, cpos, sizeof(temp2)); + /* %{2+}c copies the whole string from the second part on */ + if (rest[0] != '+') { + cpos = strchr(temp2, ' '); + if (cpos) + cpos[0] = '\0'; + } + strlcat(string, temp2, maxsize); + dbg("substitute part of result string '%s'\n", temp2); + } else { + strlcat(string, udev->program_result, maxsize); + dbg("substitute result string '%s'\n", udev->program_result); + } + break; + case SUBST_ATTR: + if (attr == NULL) + err("missing file parameter for attr\n"); + else { + char devpath[PATH_SIZE]; + char *attrib; + const char *value = NULL; + size_t size; + + if (attr_get_by_subsys_id(attr, devpath, sizeof(devpath), &attrib)) { + if (attrib != NULL) + value = sysfs_attr_get_value(devpath, attrib); + else + break; + } + + /* try the current device, other matches may have selected */ + if (value == NULL && 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'\n", 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 (value == NULL) + break; + + /* strip trailing whitespace, and replace unwanted characters */ + 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_chars(temp2, ALLOWED_CHARS_INPUT); + if (count > 0) + info("%i character(s) replaced\n" , count); + strlcat(string, temp2, maxsize); + dbg("substitute sysfs value '%s'\n", temp2); + } + break; + 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\n", 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'\n", udev_parent->name); + } else + dbg("parent not found in database\n"); + udev_device_cleanup(udev_parent); + } + } + } + break; + case SUBST_TEMP_NODE: + if (udev->tmp_node[0] == '\0' && major(udev->devt) > 0) { + dbg("create temporary device node for callout\n"); + 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_node_mknod(udev, udev->tmp_node, udev->devt, 0600, 0, 0); + } + strlcat(string, udev->tmp_node, maxsize); + dbg("substitute temporary device node name '%s'\n", udev->tmp_node); + break; + case SUBST_NAME: + if (udev->name[0] == '\0') { + strlcat(string, udev->dev->kernel, maxsize); + dbg("substitute udev->kernel '%s'\n", udev->name); + } else { + strlcat(string, udev->name, maxsize); + dbg("substitute udev->name '%s'\n", udev->name); + } + break; + case SUBST_LINKS: + if (!list_empty(&udev->symlink_list)) { + struct name_entry *name_loop; + char symlinks[PATH_SIZE] = ""; + + list_for_each_entry(name_loop, &udev->symlink_list, node) { + strlcat(symlinks, name_loop->name, sizeof(symlinks)); + strlcat(symlinks, " ", sizeof(symlinks)); + } + remove_trailing_chars(symlinks, ' '); + strlcat(string, symlinks, maxsize); + } + break; + case SUBST_ROOT: + strlcat(string, udev_root, maxsize); + dbg("substitute udev_root '%s'\n", udev_root); + break; + case SUBST_SYS: + strlcat(string, sysfs_path, maxsize); + dbg("substitute sysfs_path '%s'\n", sysfs_path); + break; + case SUBST_ENV: + if (attr == NULL) { + dbg("missing attribute\n"); + break; + } + pos = getenv(attr); + if (pos == NULL) { + dbg("env '%s' not available\n", attr); + break; + } + dbg("substitute env '%s=%s'\n", attr, pos); + strlcat(string, pos, maxsize); + break; + default: + err("unknown substitution type=%i\n", type); + break; + } + /* 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'\n", len, head); + } + strlcat(string, temp, maxsize); + } +} + +static char *key_val(struct udev_rule *rule, struct key *key) +{ + 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; + int match = 0; + + 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'\n", key_name, key_value); + while (key_value) { + pos = strchr(key_value, '|'); + if (pos) { + pos[0] = '\0'; + pos++; + } + + dbg("match %s '%s' <-> '%s'\n", key_name, key_value, val); + match = (fnmatch(key_value, val, 0) == 0); + if (match) + break; + + key_value = pos; + } + + if (match && (key->operation == KEY_OP_MATCH)) { + dbg("%s is true (matching value)\n", key_name); + return 0; + } + if (!match && (key->operation == KEY_OP_NOMATCH)) { + dbg("%s is true (non-matching value)\n", key_name); + return 0; + } + return -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 (match_key("ACTION", rule, &rule->action, udev->action)) + goto nomatch; + + if (match_key("KERNEL", rule, &rule->kernel, udev->dev->kernel)) + goto nomatch; + + if (match_key("SUBSYSTEM", rule, &rule->subsystem, udev->dev->subsystem)) + goto nomatch; + + if (match_key("DEVPATH", rule, &rule->devpath, udev->dev->devpath)) + goto nomatch; + + if (match_key("DRIVER", rule, &rule->driver, udev->dev->driver)) + goto nomatch; + + /* match NAME against a value assigned by an earlier rule */ + if (match_key("NAME", rule, &rule->name, udev->name)) + goto nomatch; + + /* match against current list of symlinks */ + if (rule->symlink_match.operation == KEY_OP_MATCH || + rule->symlink_match.operation == KEY_OP_NOMATCH) { + struct name_entry *name_loop; + int match = 0; + + list_for_each_entry(name_loop, &udev->symlink_list, node) { + if (match_key("SYMLINK", rule, &rule->symlink_match, name_loop->name) == 0) { + match = 1; + break; + } + } + if (!match) + goto nomatch; + } + + 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, treat as empty\n", key_name); + value = ""; + } + if (match_key("ENV", rule, &pair->key, value)) + goto nomatch; + } + } + + if (rule->test.operation == KEY_OP_MATCH || + rule->test.operation == KEY_OP_NOMATCH) { + char filename[PATH_SIZE]; + char devpath[PATH_SIZE]; + char *attr; + struct stat statbuf; + int match; + + strlcpy(filename, key_val(rule, &rule->test), sizeof(filename)); + udev_rules_apply_format(udev, filename, sizeof(filename)); + + if (attr_get_by_subsys_id(filename, devpath, sizeof(devpath), &attr)) { + strlcpy(filename, sysfs_path, sizeof(filename)); + strlcat(filename, devpath, sizeof(filename)); + if (attr != NULL) { + strlcat(filename, "/", sizeof(filename)); + strlcat(filename, attr, sizeof(filename)); + } + } else if (filename[0] != '/') { + char tmp[PATH_SIZE]; + + strlcpy(tmp, sysfs_path, sizeof(tmp)); + strlcat(tmp, udev->dev->devpath, sizeof(tmp)); + strlcat(tmp, "/", sizeof(tmp)); + strlcat(tmp, filename, sizeof(tmp)); + strlcpy(filename, tmp, sizeof(filename)); + } + + attr_subst_subdir(filename, sizeof(filename)); + + match = (stat(filename, &statbuf) == 0); + info("'%s' %s", filename, match ? "exists\n" : "does not exist\n"); + if (match && rule->test_mode_mask > 0) { + match = ((statbuf.st_mode & rule->test_mode_mask) > 0); + info("'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode, + match ? "matches" : "does not match", + rule->test_mode_mask); + } + if (match && rule->test.operation == KEY_OP_NOMATCH) + goto nomatch; + if (!match && rule->test.operation == KEY_OP_MATCH) + goto nomatch; + dbg("TEST key is true\n"); + } + + if (rule->wait_for.operation != KEY_OP_UNSET) { + char filename[PATH_SIZE]; + int found; + + strlcpy(filename, key_val(rule, &rule->wait_for), sizeof(filename)); + udev_rules_apply_format(udev, filename, sizeof(filename)); + found = (wait_for_file(udev, filename, 10) == 0); + if (!found && (rule->wait_for.operation != KEY_OP_NOMATCH)) + goto nomatch; + } + + /* check for matching sysfs attribute pairs */ + for (i = 0; i < rule->attr.count; i++) { + struct key_pair *pair = &rule->attr.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 devpath[PATH_SIZE]; + char *attrib; + const char *value = NULL; + char val[VALUE_SIZE]; + size_t len; + + if (attr_get_by_subsys_id(key_name, devpath, sizeof(devpath), &attrib)) { + if (attrib != NULL) + value = sysfs_attr_get_value(devpath, attrib); + else + goto nomatch; + } + if (value == NULL) + 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'\n", strlen(val)-len, val); + } + + 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 driver */ + if (match_key("DRIVERS", rule, &rule->drivers, udev->dev_parent->driver)) + goto try_parent; + + /* 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); + const char *value; + char val[VALUE_SIZE]; + size_t len; + + 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 > 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'\n", strlen(val)-len, val); + } + + if (match_key("ATTRS", rule, &pair->key, val)) + goto try_parent; + } + } + + /* found matching device */ + break; +try_parent: + /* move to parent device */ + dbg("try parent sysfs device\n"); + udev->dev_parent = sysfs_device_get_parent(udev->dev_parent); + if (udev->dev_parent == NULL) + goto nomatch; + dbg("looking at dev_parent->devpath='%s'\n", udev->dev_parent->devpath); + dbg("looking at dev_parent->kernel='%s'\n", 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) != 0) { + dbg("PROGRAM is false\n"); + udev->program_result[0] = '\0'; + if (rule->program.operation != KEY_OP_NOMATCH) + goto nomatch; + } else { + int count; + + dbg("PROGRAM matches\n"); + remove_trailing_chars(result, '\n'); + if (rule->string_escape == ESCAPE_UNSET || + rule->string_escape == ESCAPE_REPLACE) { + count = replace_chars(result, ALLOWED_CHARS_INPUT); + if (count > 0) + info("%i character(s) replaced\n" , count); + } + dbg("result is '%s'\n", result); + strlcpy(udev->program_result, result, sizeof(udev->program_result)); + dbg("PROGRAM returned successful\n"); + if (rule->program.operation == KEY_OP_NOMATCH) + goto nomatch; + } + dbg("PROGRAM key is true\n"); + } + + /* 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)); + udev_rules_apply_format(udev, import, sizeof(import)); + dbg("check for IMPORT import='%s'\n", 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'\n", import); + rc = import_file_into_env(udev, import); + } else if (rule->import_type == IMPORT_PARENT) { + dbg("import parent import='%s'\n", import); + rc = import_parent_into_env(udev, import); + } + if (rc != 0) { + dbg("IMPORT failed\n"); + if (rule->import.operation != KEY_OP_NOMATCH) + goto nomatch; + } else + dbg("IMPORT '%s' imported\n", key_val(rule, &rule->import)); + dbg("IMPORT key is true\n"); + } + + /* 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'\n", key_name); + } else { + struct name_entry *entry; + + entry = name_list_key_add(&udev->env_list, key_name, temp_value); + if (entry == NULL) + break; + putenv(entry->name); + info("set ENV '%s'\n", entry->name); + } + } + } + + /* if we have ATTR assignments, 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 devpath[PATH_SIZE]; + char *attrib; + char attr[PATH_SIZE] = ""; + char value[NAME_SIZE]; + FILE *f; + + if (attr_get_by_subsys_id(key_name, devpath, sizeof(devpath), &attrib)) { + if (attrib != NULL) { + strlcpy(attr, sysfs_path, sizeof(attr)); + strlcat(attr, devpath, sizeof(attr)); + strlcat(attr, "/", sizeof(attr)); + strlcat(attr, attrib, sizeof(attr)); + } + } + + if (attr[0] == '\0') { + strlcpy(attr, sysfs_path, sizeof(attr)); + strlcat(attr, udev->dev->devpath, sizeof(attr)); + strlcat(attr, "/", sizeof(attr)); + strlcat(attr, key_name, sizeof(attr)); + } + + attr_subst_subdir(attr, 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'\n", 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\n", attr, strerror(errno)); + fclose(f); + } else + err("error opening ATTR{%s} for writing: %s\n", attr, strerror(errno)); + } + } + return 0; + +nomatch: + return -1; +} + +int udev_rules_get_name(struct udev_rules *rules, struct udevice *udev) +{ + struct udev_rule *rule; + int name_set = 0; + + dbg("udev->dev->devpath='%s'\n", udev->dev->devpath); + dbg("udev->dev->kernel='%s'\n", udev->dev->kernel); + + /* 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 (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\n"); + continue; + } + + dbg("process rule\n"); + if (match_rule(udev, rule) == 0) { + /* apply options */ + if (rule->ignore_device) { + info("rule applied, '%s' is ignored\n", udev->dev->kernel); + udev->ignore_device = 1; + return 0; + } + if (rule->ignore_remove) { + udev->ignore_remove = 1; + dbg("remove event should be ignored\n"); + } + if (rule->link_priority != 0) { + udev->link_priority = rule->link_priority; + info("link_priority=%i\n", udev->link_priority); + } + if (rule->event_timeout >= 0) { + udev->event_timeout = rule->event_timeout; + info("event_timeout=%i\n", udev->event_timeout); + } + /* apply all_partitions option only at a main block device */ + 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\n"); + } + + /* apply permissions */ + if (!udev->mode_final && rule->mode.operation != KEY_OP_UNSET) { + if (rule->mode.operation == KEY_OP_ASSIGN_FINAL) + udev->mode_final = 1; + char buf[20]; + strlcpy(buf, key_val(rule, &rule->mode), sizeof(buf)); + udev_rules_apply_format(udev, buf, sizeof(buf)); + udev->mode = strtol(buf, NULL, 8); + dbg("applied mode=%#o to '%s'\n", udev->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)); + udev_rules_apply_format(udev, udev->owner, sizeof(udev->owner)); + dbg("applied owner='%s' to '%s'\n", 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)); + udev_rules_apply_format(udev, udev->group, sizeof(udev->group)); + dbg("applied group='%s' to '%s'\n", udev->group, udev->dev->kernel); + } + + /* collect symlinks */ + if (!udev->symlink_final && + (rule->symlink.operation == KEY_OP_ASSIGN || + rule->symlink.operation == KEY_OP_ASSIGN_FINAL || + rule->symlink.operation == KEY_OP_ADD)) { + 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) { + info("reset symlink list\n"); + name_list_cleanup(&udev->symlink_list); + } + /* allow multiple symlinks separated by spaces */ + strlcpy(temp, key_val(rule, &rule->symlink), sizeof(temp)); + udev_rules_apply_format(udev, temp, sizeof(temp)); + if (rule->string_escape == ESCAPE_UNSET || + rule->string_escape == ESCAPE_REPLACE) { + count = replace_chars(temp, ALLOWED_CHARS_FILE " "); + if (count > 0) + info("%i character(s) replaced\n" , count); + } + dbg("rule applied, added symlink(s) '%s'\n", temp); + pos = temp; + while (isspace(pos[0])) + pos++; + next = strchr(pos, ' '); + while (next) { + next[0] = '\0'; + info("add symlink '%s'\n", pos); + name_list_add(&udev->symlink_list, pos, 0); + while (isspace(next[1])) + next++; + pos = &next[1]; + next = strchr(pos, ' '); + } + if (pos[0] != '\0') { + info("add symlink '%s'\n", pos); + name_list_add(&udev->symlink_list, pos, 0); + } + } + + /* set name, later rules with name set will be ignored */ + 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)); + if (rule->string_escape == ESCAPE_UNSET || + rule->string_escape == ESCAPE_REPLACE) { + count = replace_chars(udev->name, ALLOWED_CHARS_FILE); + if (count > 0) + info("%i character(s) replaced\n", count); + } + + info("rule applied, '%s' becomes '%s'\n", 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\n", + udev->name, udev->owner, udev->group, udev->mode, udev->partitions); + } + + if (!udev->run_final && rule->run.operation != KEY_OP_UNSET) { + struct name_entry *entry; + + 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) { + info("reset run list\n"); + name_list_cleanup(&udev->run_list); + } + dbg("add run '%s'\n", key_val(rule, &rule->run)); + entry = name_list_add(&udev->run_list, key_val(rule, &rule->run), 0); + if (rule->run_ignore_error) + entry->ignore_error = 1; + } + + if (rule->last_rule) { + dbg("last rule to be applied\n"); + break; + } + + if (rule->goto_label.operation != KEY_OP_UNSET) { + dbg("moving forward to label '%s'\n", key_val(rule, &rule->goto_label)); + udev_rules_iter_label(rules, key_val(rule, &rule->goto_label)); + } + } + } + + if (!name_set) { + info("no node name set, will use kernel name '%s'\n", udev->dev->kernel); + strlcpy(udev->name, udev->dev->kernel, sizeof(udev->name)); + } + + if (udev->tmp_node[0] != '\0') { + dbg("removing temporary device node\n"); + unlink_secure(udev->tmp_node); + udev->tmp_node[0] = '\0'; + } + + return 0; +} + +int udev_rules_get_run(struct udev_rules *rules, struct udevice *udev) +{ + struct udev_rule *rule; + + dbg("udev->kernel='%s'\n", udev->dev->kernel); + + /* 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("process rule\n"); + if (rule->name.operation == KEY_OP_ASSIGN || + rule->name.operation == KEY_OP_ASSIGN_FINAL || + rule->name.operation == KEY_OP_ADD || + rule->symlink.operation == KEY_OP_ASSIGN || + rule->symlink.operation == KEY_OP_ASSIGN_FINAL || + rule->symlink.operation == KEY_OP_ADD || + 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\n"); + continue; + } + + if (match_rule(udev, rule) == 0) { + if (rule->ignore_device) { + info("rule applied, '%s' is ignored\n", udev->dev->kernel); + udev->ignore_device = 1; + return 0; + } + if (rule->ignore_remove) { + udev->ignore_remove = 1; + dbg("remove event should be ignored\n"); + } + + if (!udev->run_final && rule->run.operation != KEY_OP_UNSET) { + struct name_entry *entry; + + if (rule->run.operation == KEY_OP_ASSIGN || + rule->run.operation == KEY_OP_ASSIGN_FINAL) { + info("reset run list\n"); + name_list_cleanup(&udev->run_list); + } + dbg("add run '%s'\n", key_val(rule, &rule->run)); + entry = name_list_add(&udev->run_list, key_val(rule, &rule->run), 0); + if (rule->run_ignore_error) + entry->ignore_error = 1; + if (rule->run.operation == KEY_OP_ASSIGN_FINAL) + break; + } + + if (rule->last_rule) { + dbg("last rule to be applied\n"); + break; + } + + if (rule->goto_label.operation != KEY_OP_UNSET) { + dbg("moving forward to label '%s'\n", key_val(rule, &rule->goto_label)); + udev_rules_iter_label(rules, key_val(rule, &rule->goto_label)); + } + } + } + + return 0; +} |