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systemd-stable/namedev.c

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/*
* namedev.c
*
* Userspace devfs
*
* Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
*
*
* 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.
*
*/
/* define this to enable parsing debugging */
/* #define DEBUG_PARSER */
#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 <sys/wait.h>
#include "list.h"
#include "udev.h"
#include "udev_version.h"
#include "namedev.h"
#include "libsysfs/libsysfs.h"
#include "klibc_fixups.h"
#define TYPE_LABEL "LABEL"
#define TYPE_NUMBER "NUMBER"
#define TYPE_TOPOLOGY "TOPOLOGY"
#define TYPE_REPLACE "REPLACE"
#define TYPE_CALLOUT "CALLOUT"
#define CALLOUT_MAXARG 8
static LIST_HEAD(config_device_list);
/* s2 may end with '*' to match everything */
static int strncmp_wildcard(char *s1, char *s2, int max)
{
int len = strlen(s2);
if (len > max)
len = max;
if (s2[len-1] == '*')
len--;
else
len = max;
return strncmp(s1, s2, len);
}
static void dump_dev(struct config_device *dev)
{
switch (dev->type) {
case KERNEL_NAME:
dbg_parse("KERNEL name='%s' ,"
"owner='%s', group='%s', mode=%#o",
dev->name, dev->owner, dev->group, dev->mode);
break;
case LABEL:
dbg_parse("LABEL name='%s', bus='%s', sysfs_file='%s', sysfs_value='%s', "
"owner='%s', group='%s', mode=%#o",
dev->name, dev->bus, dev->sysfs_file, dev->sysfs_value,
dev->owner, dev->group, dev->mode);
break;
case NUMBER:
dbg_parse("NUMBER name='%s', bus='%s', id='%s', "
"owner='%s', group='%s', mode=%#o",
dev->name, dev->bus, dev->id,
dev->owner, dev->group, dev->mode);
break;
case TOPOLOGY:
dbg_parse("TOPOLOGY name='%s', bus='%s', place='%s', "
"owner='%s', group='%s', mode=%#o",
dev->name, dev->bus, dev->place,
dev->owner, dev->group, dev->mode);
break;
case REPLACE:
dbg_parse("REPLACE name=%s, kernel_name=%s, "
"owner='%s', group='%s', mode=%#o",
dev->name, dev->kernel_name,
dev->owner, dev->group, dev->mode);
break;
case CALLOUT:
dbg_parse("CALLOUT name='%s', bus='%s', program='%s', id='%s', "
"owner='%s', group='%s', mode=%#o",
dev->name, dev->bus, dev->exec_program, dev->id,
dev->owner, dev->group, dev->mode);
break;
default:
dbg_parse("unknown type of method");
}
}
#define copy_var(a, b, var) \
if (b->var) \
a->var = b->var;
#define copy_string(a, b, var) \
if (strlen(b->var)) \
strcpy(a->var, b->var);
static int add_dev(struct config_device *new_dev)
{
struct list_head *tmp;
struct config_device *tmp_dev;
/* update the values if we already have the device */
list_for_each(tmp, &config_device_list) {
struct config_device *dev = list_entry(tmp, struct config_device, node);
if (strncmp_wildcard(dev->name, new_dev->name, sizeof(dev->name)))
continue;
if (strncmp(dev->bus, new_dev->bus, sizeof(dev->name)))
continue;
copy_var(dev, new_dev, type);
copy_var(dev, new_dev, mode);
copy_string(dev, new_dev, bus);
copy_string(dev, new_dev, sysfs_file);
copy_string(dev, new_dev, sysfs_value);
copy_string(dev, new_dev, id);
copy_string(dev, new_dev, place);
copy_string(dev, new_dev, kernel_name);
copy_string(dev, new_dev, exec_program);
copy_string(dev, new_dev, owner);
copy_string(dev, new_dev, group);
return 0;
}
/* not found, add new structure to the device list */
tmp_dev = malloc(sizeof(*tmp_dev));
if (!tmp_dev)
return -ENOMEM;
memcpy(tmp_dev, new_dev, sizeof(*tmp_dev));
list_add_tail(&tmp_dev->node, &config_device_list);
//dump_dev(tmp_dev);
return 0;
}
static void dump_dev_list(void)
{
struct list_head *tmp;
list_for_each(tmp, &config_device_list) {
struct config_device *dev = list_entry(tmp, struct config_device, node);
dump_dev(dev);
}
}
static int get_pair(char **orig_string, char **left, char **right)
{
char *temp;
char *string = *orig_string;
if (!string)
return -ENODEV;
/* eat any whitespace */
while (isspace(*string))
++string;
/* split based on '=' */
temp = strsep(&string, "=");
*left = temp;
if (!string)
return -ENODEV;
/* take the right side and strip off the '"' */
while (isspace(*string))
++string;
if (*string == '"')
++string;
else
return -ENODEV;
temp = strsep(&string, "\"");
if (!string || *temp == '\0')
return -ENODEV;
*right = temp;
*orig_string = string;
return 0;
}
static int get_value(const char *left, char **orig_string, char **ret_string)
{
int retval;
char *left_string;
retval = get_pair(orig_string, &left_string, ret_string);
if (retval)
return retval;
if (strcasecmp(left_string, left) != 0)
return -ENODEV;
return 0;
}
static int namedev_init_config(void)
{
char line[255];
int lineno;
char *temp;
char *temp2;
char *temp3;
FILE *fd;
int retval = 0;
struct config_device dev;
dbg("opening '%s' to read as config", udev_config_filename);
fd = fopen(udev_config_filename, "r");
if (fd == NULL) {
dbg("can't open '%s'", udev_config_filename);
return -ENODEV;
}
/* loop through the whole file */
lineno = 0;
while (1) {
/* get a line */
temp = fgets(line, sizeof(line), fd);
if (temp == NULL)
goto exit;
lineno++;
dbg_parse("read '%s'", temp);
/* eat the whitespace at the beginning of the line */
while (isspace(*temp))
++temp;
/* empty line? */
if (*temp == 0x00)
continue;
/* see if this is a comment */
if (*temp == COMMENT_CHARACTER)
continue;
memset(&dev, 0x00, sizeof(struct config_device));
/* parse the line */
temp2 = strsep(&temp, ",");
if (strcasecmp(temp2, TYPE_LABEL) == 0) {
/* label type */
dev.type = LABEL;
/* BUS="bus" */
retval = get_value("BUS", &temp, &temp3);
if (retval)
break;
strfieldcpy(dev.bus, temp3);
/* file="value" */
temp2 = strsep(&temp, ",");
retval = get_pair(&temp, &temp2, &temp3);
if (retval)
break;
strfieldcpy(dev.sysfs_file, temp2);
strfieldcpy(dev.sysfs_value, temp3);
/* NAME="new_name" */
temp2 = strsep(&temp, ",");
retval = get_value("NAME", &temp, &temp3);
if (retval)
break;
strfieldcpy(dev.name, temp3);
dbg_parse("LABEL name='%s', bus='%s', "
"sysfs_file='%s', sysfs_value='%s'",
dev.name, dev.bus, dev.sysfs_file,
dev.sysfs_value);
}
if (strcasecmp(temp2, TYPE_NUMBER) == 0) {
/* number type */
dev.type = NUMBER;
/* BUS="bus" */
retval = get_value("BUS", &temp, &temp3);
if (retval)
break;
strfieldcpy(dev.bus, temp3);
/* ID="id" */
temp2 = strsep(&temp, ",");
retval = get_value("ID", &temp, &temp3);
if (retval)
break;
strfieldcpy(dev.id, temp3);
/* NAME="new_name" */
temp2 = strsep(&temp, ",");
retval = get_value("NAME", &temp, &temp3);
if (retval)
break;
strfieldcpy(dev.name, temp3);
dbg_parse("NUMBER name='%s', bus='%s', id='%s'",
dev.name, dev.bus, dev.id);
}
if (strcasecmp(temp2, TYPE_TOPOLOGY) == 0) {
/* number type */
dev.type = TOPOLOGY;
/* BUS="bus" */
retval = get_value("BUS", &temp, &temp3);
if (retval)
break;
strfieldcpy(dev.bus, temp3);
/* PLACE="place" */
temp2 = strsep(&temp, ",");
retval = get_value("PLACE", &temp, &temp3);
if (retval)
break;
strfieldcpy(dev.place, temp3);
/* NAME="new_name" */
temp2 = strsep(&temp, ",");
retval = get_value("NAME", &temp, &temp3);
if (retval)
break;
strfieldcpy(dev.name, temp3);
dbg_parse("TOPOLOGY name='%s', bus='%s', place='%s'",
dev.name, dev.bus, dev.place);
}
if (strcasecmp(temp2, TYPE_REPLACE) == 0) {
/* number type */
dev.type = REPLACE;
/* KERNEL="kernel_name" */
retval = get_value("KERNEL", &temp, &temp3);
if (retval)
break;
strfieldcpy(dev.kernel_name, temp3);
/* NAME="new_name" */
temp2 = strsep(&temp, ",");
retval = get_value("NAME", &temp, &temp3);
if (retval)
break;
strfieldcpy(dev.name, temp3);
dbg_parse("REPLACE name='%s', kernel_name='%s'",
dev.name, dev.kernel_name);
}
if (strcasecmp(temp2, TYPE_CALLOUT) == 0) {
/* number type */
dev.type = CALLOUT;
/* BUS="bus" */
retval = get_value("BUS", &temp, &temp3);
if (retval)
break;
strfieldcpy(dev.bus, temp3);
/* PROGRAM="executable" */
temp2 = strsep(&temp, ",");
retval = get_value("PROGRAM", &temp, &temp3);
if (retval)
break;
strfieldcpy(dev.exec_program, temp3);
/* ID="id" */
temp2 = strsep(&temp, ",");
retval = get_value("ID", &temp, &temp3);
if (retval)
break;
strfieldcpy(dev.id, temp3);
/* NAME="new_name" */
temp2 = strsep(&temp, ",");
retval = get_value("NAME", &temp, &temp3);
if (retval)
break;
strfieldcpy(dev.name, temp3);
dbg_parse("CALLOUT name='%s', program='%s'",
dev.name, dev.exec_program);
}
retval = add_dev(&dev);
if (retval) {
dbg("add_dev returned with error %d", retval);
goto exit;
}
}
dbg_parse("%s:%d:%Zd: error parsing '%s'", udev_config_filename,
lineno, temp - line, temp);
exit:
fclose(fd);
return retval;
}
static int namedev_init_permissions(void)
{
char line[255];
char *temp;
char *temp2;
FILE *fd;
int retval = 0;
struct config_device dev;
dbg("opening '%s' to read as permissions config", udev_config_permission_filename);
fd = fopen(udev_config_permission_filename, "r");
if (fd == NULL) {
dbg("can't open '%s'", udev_config_permission_filename);
return -ENODEV;
}
/* loop through the whole file */
while (1) {
temp = fgets(line, sizeof(line), fd);
if (temp == NULL)
break;
dbg_parse("read '%s'", temp);
/* eat the whitespace at the beginning of the line */
while (isspace(*temp))
++temp;
/* empty line? */
if (*temp == 0x00)
continue;
/* see if this is a comment */
if (*temp == COMMENT_CHARACTER)
continue;
memset(&dev, 0x00, sizeof(dev));
/* parse the line */
temp2 = strsep(&temp, ":");
if (!temp2) {
dbg("cannot parse line '%s'", line);
continue;
}
strncpy(dev.name, temp2, sizeof(dev.name));
temp2 = strsep(&temp, ":");
if (!temp2) {
dbg("cannot parse line '%s'", line);
continue;
}
strncpy(dev.owner, temp2, sizeof(dev.owner));
temp2 = strsep(&temp, ":");
if (!temp2) {
dbg("cannot parse line '%s'", line);
continue;
}
strncpy(dev.group, temp2, sizeof(dev.owner));
if (!temp) {
dbg("cannot parse line: %s", line);
continue;
}
dev.mode = strtol(temp, NULL, 8);
dbg_parse("name='%s', owner='%s', group='%s', mode=%#o",
dev.name, dev.owner, dev.group,
dev.mode);
retval = add_dev(&dev);
if (retval) {
dbg("add_dev returned with error %d", retval);
goto exit;
}
}
exit:
fclose(fd);
return retval;
}
static mode_t get_default_mode(struct sysfs_class_device *class_dev)
{
/* just default everyone to rw for the world! */
return 0666;
}
static void build_kernel_number(struct sysfs_class_device *class_dev, struct udevice *udev)
{
char *dig;
/* FIXME, figure out how to handle stuff like sdaj which will not work right now. */
dig = class_dev->name + strlen(class_dev->name);
while (isdigit(*(dig-1)))
dig--;
strfieldcpy(udev->kernel_number, dig);
dbg("kernel_number='%s'", udev->kernel_number);
}
static void apply_format(struct udevice *udev, unsigned char *string)
{
char name[NAME_SIZE];
char *pos;
while (1) {
pos = strchr(string, '%');
if (pos) {
strfieldcpy(name, pos+2);
*pos = 0x00;
switch (pos[1]) {
case 'b':
if (strlen(udev->bus_id) == 0)
break;
strcat(pos, udev->bus_id);
dbg("substitute bus_id '%s'", udev->bus_id);
break;
case 'n':
if (strlen(udev->kernel_number) == 0)
break;
strcat(pos, udev->kernel_number);
dbg("substitute kernel number '%s'", udev->kernel_number);
break;
case 'D':
if (strlen(udev->kernel_number) == 0) {
strcat(pos, "disk");
break;
}
strcat(pos, "part");
strcat(pos, udev->kernel_number);
dbg("substitute kernel number '%s'", udev->kernel_number);
break;
case 'm':
sprintf(pos, "%u", udev->minor);
dbg("substitute minor number '%u'", udev->minor);
break;
case 'M':
sprintf(pos, "%u", udev->major);
dbg("substitute major number '%u'", udev->major);
break;
case 'c':
if (strlen(udev->callout_value) == 0)
break;
strcat(pos, udev->callout_value);
dbg("substitute callout output '%s'", udev->callout_value);
break;
default:
dbg("unknown substitution type '%%%c'", pos[1]);
break;
}
strcat(string, name);
} else
break;
}
}
static int exec_callout(struct config_device *dev, char *value, int len)
{
int retval;
int res;
int status;
int fds[2];
pid_t pid;
int value_set = 0;
char buffer[256];
char *arg;
char *args[CALLOUT_MAXARG];
int i;
dbg("callout to '%s'", dev->exec_program);
retval = pipe(fds);
if (retval != 0) {
dbg("pipe failed");
return -1;
}
pid = fork();
if (pid == -1) {
dbg("fork failed");
return -1;
}
if (pid == 0) {
/* child */
close(STDOUT_FILENO);
dup(fds[1]); /* dup write side of pipe to STDOUT */
if (strchr(dev->exec_program, ' ')) {
/* callout with arguments */
arg = dev->exec_program;
for (i=0; i < CALLOUT_MAXARG-1; i++) {
args[i] = strsep(&arg, " ");
if (args[i] == NULL)
break;
}
if (args[i]) {
dbg("too many args - %d", i);
args[i] = NULL;
}
retval = execve(args[0], args, main_envp);
} else {
retval = execve(dev->exec_program, main_argv, main_envp);
}
if (retval != 0) {
dbg("child execve failed");
exit(1);
}
return -1; /* avoid compiler warning */
} else {
/* parent reads from fds[0] */
close(fds[1]);
retval = 0;
while (1) {
res = read(fds[0], buffer, sizeof(buffer) - 1);
if (res <= 0)
break;
buffer[res] = '\0';
if (res > len) {
dbg("callout len %d too short", len);
retval = -1;
}
if (value_set) {
dbg("callout value already set");
retval = -1;
} else {
value_set = 1;
strncpy(value, buffer, len);
}
}
dbg("callout returned '%s'", value);
close(fds[0]);
res = wait(&status);
if (res < 0) {
dbg("wait failed result %d", res);
retval = -1;
}
#ifndef __KLIBC__
if (!WIFEXITED(status) || (WEXITSTATUS(status) != 0)) {
dbg("callout program status 0x%x", status);
retval = -1;
}
#endif
}
return retval;
}
static int do_callout(struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device)
{
struct config_device *dev;
struct list_head *tmp;
list_for_each(tmp, &config_device_list) {
dev = list_entry(tmp, struct config_device, node);
if (dev->type != CALLOUT)
continue;
if (sysfs_device) {
dbg_parse("dev->bus='%s' sysfs_device->bus='%s'", dev->bus, sysfs_device->bus);
if (strcasecmp(dev->bus, sysfs_device->bus) != 0)
continue;
}
/* substitute anything that needs to be in the program name */
apply_format(udev, dev->exec_program);
if (exec_callout(dev, udev->callout_value, NAME_SIZE))
continue;
if (strncmp_wildcard(udev->callout_value, dev->id, NAME_SIZE) != 0)
continue;
strfieldcpy(udev->name, dev->name);
if (dev->mode != 0) {
udev->mode = dev->mode;
strfieldcpy(udev->owner, dev->owner);
strfieldcpy(udev->group, dev->group);
}
dbg_parse("callout returned matching value '%s', '%s' becomes '%s'"
" - owner='%s', group='%s', mode=%#o",
dev->id, class_dev->name, udev->name,
dev->owner, dev->group, dev->mode);
return 0;
}
return -ENODEV;
}
static int do_label(struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device)
{
struct sysfs_attribute *tmpattr = NULL;
struct config_device *dev;
struct list_head *tmp;
list_for_each(tmp, &config_device_list) {
dev = list_entry(tmp, struct config_device, node);
if (dev->type != LABEL)
continue;
if (sysfs_device) {
dbg_parse("dev->bus='%s' sysfs_device->bus='%s'", dev->bus, sysfs_device->bus);
if (strcasecmp(dev->bus, sysfs_device->bus) != 0)
continue;
}
dbg_parse("look for device attribute '%s'", dev->sysfs_file);
/* try to find the attribute in the class device directory */
tmpattr = sysfs_get_classdev_attr(class_dev, dev->sysfs_file);
if (tmpattr)
goto label_found;
/* look in the class device directory if present */
if (sysfs_device) {
tmpattr = sysfs_get_device_attr(sysfs_device, dev->sysfs_file);
if (tmpattr)
goto label_found;
}
continue;
label_found:
tmpattr->value[strlen(tmpattr->value)-1] = 0x00;
dbg_parse("compare attribute '%s' value '%s' with '%s'",
dev->sysfs_file, tmpattr->value, dev->sysfs_value);
if (strcmp(dev->sysfs_value, tmpattr->value) != 0)
continue;
strfieldcpy(udev->name, dev->name);
if (dev->mode != 0) {
udev->mode = dev->mode;
strfieldcpy(udev->owner, dev->owner);
strfieldcpy(udev->group, dev->group);
}
dbg_parse("found matching attribute '%s', '%s' becomes '%s' "
"- owner='%s', group='%s', mode=%#o",
dev->sysfs_file, class_dev->name, udev->name,
dev->owner, dev->group, dev->mode);
return 0;
}
return -ENODEV;
}
static int do_number(struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device)
{
struct config_device *dev;
struct list_head *tmp;
char path[SYSFS_PATH_MAX];
int found;
char *temp = NULL;
/* we have to have a sysfs device for NUMBER to work */
if (!sysfs_device)
return -ENODEV;
list_for_each(tmp, &config_device_list) {
dev = list_entry(tmp, struct config_device, node);
if (dev->type != NUMBER)
continue;
dbg_parse("dev->bus='%s' sysfs_device->bus='%s'", dev->bus, sysfs_device->bus);
if (strcasecmp(dev->bus, sysfs_device->bus) != 0)
continue;
found = 0;
strfieldcpy(path, sysfs_device->path);
temp = strrchr(path, '/');
dbg_parse("search '%s' in '%s', path='%s'", dev->id, temp, path);
if (strstr(temp, dev->id) != NULL) {
found = 1;
} else {
*temp = 0x00;
temp = strrchr(path, '/');
dbg_parse("search '%s' in '%s', path='%s'", dev->id, temp, path);
if (strstr(temp, dev->id) != NULL)
found = 1;
}
if (!found)
continue;
strfieldcpy(udev->name, dev->name);
if (dev->mode != 0) {
udev->mode = dev->mode;
strfieldcpy(udev->owner, dev->owner);
strfieldcpy(udev->group, dev->group);
}
dbg_parse("found matching id '%s', '%s' becomes '%s'"
" - owner='%s', group ='%s', mode=%#o",
dev->id, class_dev->name, udev->name,
dev->owner, dev->group, dev->mode);
return 0;
}
return -ENODEV;
}
static int do_topology(struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device)
{
struct config_device *dev;
struct list_head *tmp;
char path[SYSFS_PATH_MAX];
int found;
char *temp = NULL;
/* we have to have a sysfs device for TOPOLOGY to work */
if (!sysfs_device)
return -ENODEV;
list_for_each(tmp, &config_device_list) {
dev = list_entry(tmp, struct config_device, node);
if (dev->type != TOPOLOGY)
continue;
dbg_parse("dev->bus='%s' sysfs_device->bus='%s'", dev->bus, sysfs_device->bus);
if (strcasecmp(dev->bus, sysfs_device->bus) != 0)
continue;
found = 0;
strfieldcpy(path, sysfs_device->path);
temp = strrchr(path, '/');
dbg_parse("search '%s' in '%s', path='%s'", dev->place, temp, path);
if (strstr(temp, dev->place) != NULL) {
found = 1;
} else {
*temp = 0x00;
temp = strrchr(path, '/');
dbg_parse("search '%s' in '%s', path='%s'", dev->place, temp, path);
if (strstr(temp, dev->place) != NULL)
found = 1;
}
if (!found)
continue;
strfieldcpy(udev->name, dev->name);
if (dev->mode != 0) {
udev->mode = dev->mode;
strfieldcpy(udev->owner, dev->owner);
strfieldcpy(udev->group, dev->group);
}
dbg_parse("found matching place '%s', '%s' becomes '%s'"
" - owner='%s', group ='%s', mode=%#o",
dev->place, class_dev->name, udev->name,
dev->owner, dev->group, dev->mode);
return 0;
}
return -ENODEV;
}
static int do_replace(struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device)
{
struct config_device *dev;
struct list_head *tmp;
list_for_each(tmp, &config_device_list) {
dev = list_entry(tmp, struct config_device, node);
if (dev->type != REPLACE)
continue;
dbg_parse("compare name '%s' with '%s'",
dev->kernel_name, class_dev->name);
if (strncmp_wildcard(class_dev->name, dev->kernel_name, NAME_SIZE) != 0)
continue;
strfieldcpy(udev->name, dev->name);
if (dev->mode != 0) {
udev->mode = dev->mode;
strfieldcpy(udev->owner, dev->owner);
strfieldcpy(udev->group, dev->group);
}
dbg_parse("found name, '%s' becomes '%s' - owner='%s', group='%s', mode = %#o",
dev->kernel_name, udev->name,
dev->owner, dev->group, dev->mode);
return 0;
}
return -ENODEV;
}
static void do_kernelname(struct sysfs_class_device *class_dev, struct udevice *udev)
{
struct config_device *dev;
struct list_head *tmp;
int len;
strfieldcpy(udev->name, class_dev->name);
/* look for permissions */
list_for_each(tmp, &config_device_list) {
dev = list_entry(tmp, struct config_device, node);
len = strlen(dev->name);
if (strncmp_wildcard(class_dev->name, dev->name, sizeof(dev->name)))
continue;
if (dev->mode != 0) {
dbg_parse("found permissions for '%s'", class_dev->name);
udev->mode = dev->mode;
strfieldcpy(udev->owner, dev->owner);
strfieldcpy(udev->group, dev->group);
}
}
}
int namedev_name_device(struct sysfs_class_device *class_dev, struct udevice *udev)
{
struct sysfs_device *sysfs_device = NULL;
struct sysfs_class_device *class_dev_parent = NULL;
int retval = 0;
char *temp = NULL;
udev->mode = 0;
/* find the sysfs_device for this class device */
/* Wouldn't it really be nice if libsysfs could do this for us? */
if (class_dev->sysdevice) {
sysfs_device = class_dev->sysdevice;
} else {
/* bah, let's go backwards up a level to see if the device is there,
* as block partitions don't point to the physical device. Need to fix that
* up in the kernel...
*/
if (strstr(class_dev->path, "block")) {
dbg_parse("looking at block device");
if (isdigit(class_dev->path[strlen(class_dev->path)-1])) {
char path[SYSFS_PATH_MAX];
dbg_parse("really is a partition");
strfieldcpy(path, class_dev->path);
temp = strrchr(path, '/');
*temp = 0x00;
dbg_parse("looking for a class device at '%s'", path);
class_dev_parent = sysfs_open_class_device(path);
if (class_dev_parent == NULL) {
dbg("sysfs_open_class_device at '%s' failed", path);
} else {
dbg_parse("class_dev_parent->name='%s'", class_dev_parent->name);
if (class_dev_parent->sysdevice)
sysfs_device = class_dev_parent->sysdevice;
}
}
}
}
if (sysfs_device) {
dbg_parse("sysfs_device->path='%s'", sysfs_device->path);
dbg_parse("sysfs_device->bus_id='%s'", sysfs_device->bus_id);
dbg_parse("sysfs_device->bus='%s'", sysfs_device->bus);
strfieldcpy(udev->bus_id, sysfs_device->bus_id);
} else {
dbg_parse("class_dev->name = '%s'", class_dev->name);
}
build_kernel_number(class_dev, udev);
/* rules are looked at in priority order */
retval = do_callout(class_dev, udev, sysfs_device);
if (retval == 0)
goto found;
retval = do_label(class_dev, udev, sysfs_device);
if (retval == 0)
goto found;
retval = do_number(class_dev, udev, sysfs_device);
if (retval == 0)
goto found;
retval = do_topology(class_dev, udev, sysfs_device);
if (retval == 0)
goto found;
retval = do_replace(class_dev, udev, sysfs_device);
if (retval == 0)
goto found;
do_kernelname(class_dev, udev);
goto done;
found:
/* substitute placeholder in NAME */
apply_format(udev, udev->name);
done:
/* mode was never set above */
if (!udev->mode) {
udev->mode = get_default_mode(class_dev);
udev->owner[0] = 0x00;
udev->group[0] = 0x00;
}
if (class_dev_parent)
sysfs_close_class_device(class_dev_parent);
return 0;
}
int namedev_init(void)
{
int retval;
retval = namedev_init_config();
if (retval)
return retval;
retval = namedev_init_permissions();
if (retval)
return retval;
dump_dev_list();
return retval;
}
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