[thirdparty/systemd.git] / namedev.c

/*
 * 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.
 *
 */

#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"

LIST_HEAD(config_device_list);
LIST_HEAD(perm_device_list);

/* compare string with pattern (supports * ? [0-9] [!A-Z]) */
static int strcmp_pattern(const char *p, const char *s)
{
	if (*s == '\0') {
		while (*p == '*')
			p++;
		return (*p != '\0');
	}
	switch (*p) {
	case '[':
		{
			int not = 0;
			p++;
			if (*p == '!') {
				not = 1;
				p++;
			}
			while (*p && (*p != ']')) {
				int match = 0;
				if (p[1] == '-') {
					if ((*s >= *p) && (*s <= p[2]))
						match = 1;
					p += 3;
				} else {
					match = (*p == *s);
					p++;
				}
				if (match ^ not) {
					while (*p && (*p != ']'))
						p++;
					return strcmp_pattern(p+1, s+1);
				}
			}
		}
		break;
	case '*':
		if (strcmp_pattern(p, s+1))
			return strcmp_pattern(p+1, s);
		return 0;
	case '\0':
		if (*s == '\0') {
			return 0;
		}
		break;
	default:
		if ((*p == *s) || (*p == '?'))
			return strcmp_pattern(p+1, s+1);
		break;
	}
	return 1;
}

#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);

int add_config_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 (strcmp_pattern(new_dev->name, dev->name))
			continue;
		if (strncmp(dev->bus, new_dev->bus, sizeof(dev->name)))
			continue;
		copy_var(dev, new_dev, type);
		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, symlink);
		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_config_dev(tmp_dev);
	return 0;
}

int add_perm_dev(struct perm_device *new_dev)
{
	struct list_head *tmp;
	struct perm_device *tmp_dev;

	/* update the values if we already have the device */
	list_for_each(tmp, &perm_device_list) {
		struct perm_device *dev = list_entry(tmp, struct perm_device, node);
		if (strcmp_pattern(new_dev->name, dev->name))
			continue;
		copy_var(dev, new_dev, mode);
		copy_string(dev, new_dev, owner);
		copy_string(dev, new_dev, group);
		return 0;
	}

	/* not found, add new structure to the perm 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, &perm_device_list);
	//dump_perm_dev(tmp_dev);
	return 0;
}

static struct perm_device *find_perm(char *name)
{
	struct list_head *tmp;
	struct perm_device *perm = NULL;

	list_for_each(tmp, &perm_device_list) {
		perm = list_entry(tmp, struct perm_device, node);
		if (strcmp_pattern(perm->name, name))
			continue;
		return perm;
	}
	return NULL;
}

static mode_t get_default_mode(struct sysfs_class_device *class_dev)
{
	mode_t mode = 0600;	/* default to owner rw only */

	if (strlen(default_mode_str) != 0) {
		mode = strtol(default_mode_str, NULL, 8);
	}
	return mode;
}

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 temp[NAME_SIZE];
	char *tail;
	char *pos;
	char *pos2;
	char *pos3;
	int num;

	while (1) {
		num = 0;
		pos = strchr(string, '%');

		if (pos) {
			*pos = '\0';
			tail = pos+1;
			if (isdigit(tail[0])) {
				num = (int) strtoul(&pos[1], &tail, 10);
				if (tail == NULL) {
					dbg("format parsing error '%s'", pos+1);
					break;
				}
			}
			strfieldcpy(name, tail+1);

			switch (tail[0]) {
			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, "disc");
					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;
				if (num) {
					/* get part of return string */
					strncpy(temp, udev->callout_value, sizeof(temp));
					pos2 = temp;
					while (num) {
						num--;
						pos3 = strsep(&pos2, " ");
						if (pos3 == NULL) {
							dbg("requested part of callout string not found");
							break;
						}
					}
					strcat(pos, pos3);
					dbg("substitute partial callout output '%s'", pos3);
				} else {
					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 *pos;
	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 */
			pos = dev->exec_program;
			for (i=0; i < CALLOUT_MAXARG-1; i++) {
				args[i] = strsep(&pos, " ");
				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);
				pos = value + strlen(value)-1;
				if (pos[0] == '\n')
				pos[0] = '\0';
				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("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 (strcmp_pattern(dev->id, udev->callout_value) != 0)
			continue;
		strfieldcpy(udev->name, dev->name);
		strfieldcpy(udev->symlink, dev->symlink);
		dbg("callout returned matching value '%s', '%s' becomes '%s'",
		    dev->id, class_dev->name, udev->name);
		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;
	char *c;

	list_for_each(tmp, &config_device_list) {
		dev = list_entry(tmp, struct config_device, node);
		if (dev->type != LABEL)
			continue;

		if (sysfs_device) {
			dbg("dev->bus='%s' sysfs_device->bus='%s'", dev->bus, sysfs_device->bus);
			if (strcasecmp(dev->bus, sysfs_device->bus) != 0)
				continue;
		}

		dbg("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:
		c = tmpattr->value + strlen(tmpattr->value)-1;
		if (*c == '\n')
			*c = 0x00;
		dbg("compare attribute '%s' value '%s' with '%s'",
			  dev->sysfs_file, tmpattr->value, dev->sysfs_value);
		if (strcmp_pattern(dev->sysfs_value, tmpattr->value) != 0)
			continue;

		strfieldcpy(udev->name, dev->name);
		strfieldcpy(udev->symlink, dev->symlink);
		dbg("found matching attribute '%s', '%s' becomes '%s' ",
		    dev->sysfs_file, class_dev->name, udev->name);

		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("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("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("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);
		strfieldcpy(udev->symlink, dev->symlink);
		dbg("found matching id '%s', '%s' becomes '%s'",
		    dev->id, class_dev->name, udev->name);
		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("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("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("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);
		strfieldcpy(udev->symlink, dev->symlink);
		dbg("found matching place '%s', '%s' becomes '%s'",
		    dev->place, class_dev->name, udev->name);
		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("compare name '%s' with '%s'", dev->kernel_name, class_dev->name);
		if (strcmp_pattern(dev->kernel_name, class_dev->name) != 0)
			continue;

		strfieldcpy(udev->name, dev->name);
		strfieldcpy(udev->symlink, dev->symlink);
		dbg("found name, '%s' becomes '%s'", dev->kernel_name, udev->name);
		
		return 0;
	}
	return -ENODEV;
}

static void do_kernelname(struct sysfs_class_device *class_dev, struct udevice *udev)
{
	/* heh, this is pretty simple... */
	strfieldcpy(udev->name, class_dev->name);
}

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;
	struct perm_device *perm;

	udev->mode = 0;

	/* find the sysfs_device for this class device */
	/* Wouldn't it really be nice if libsysfs could do this for us? */
	sysfs_device = sysfs_get_classdev_device(class_dev);
	if (sysfs_device == NULL) {
		/* 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 (strcmp(class_dev->classname, SYSFS_BLOCK_NAME) == 0) {
			dbg("looking at block device");
			if (isdigit(class_dev->path[strlen(class_dev->path)-1])) {
				dbg("really is a partition");
				class_dev_parent = sysfs_get_classdev_parent
								   (class_dev);
				if (class_dev_parent == NULL) {
					dbg("sysfs_get_classdev_parent for class device '%s' failed", class_dev->name);
				} else {
					dbg("class_dev_parent->name='%s'", class_dev_parent->name);
					sysfs_device = sysfs_get_classdev_device(class_dev_parent);
				}
			}
		}
	}

	if (sysfs_device) {
		dbg("sysfs_device->path='%s'", sysfs_device->path);
		dbg("sysfs_device->bus_id='%s'", sysfs_device->bus_id);
		dbg("sysfs_device->bus='%s'", sysfs_device->bus);
		strfieldcpy(udev->bus_id, sysfs_device->bus_id);
	} else {
		dbg("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 */
	apply_format(udev, udev->name);
	apply_format(udev, udev->symlink);

done:
	perm = find_perm(udev->name);
	if (perm) {
		udev->mode = perm->mode;
		strfieldcpy(udev->owner, perm->owner);
		strfieldcpy(udev->group, perm->group);
	} else {
		/* no matching perms found :( */
		udev->mode = get_default_mode(class_dev);
		udev->owner[0] = 0x00;
		udev->group[0] = 0x00;
	}
	dbg("name, '%s' is going to have owner='%s', group='%s', mode = %#o",
	    udev->name, udev->owner, udev->group, udev->mode);

	return 0;
}

int namedev_init(void)
{
	int retval;

	retval = namedev_init_rules();
	if (retval)
		return retval;

	retval = namedev_init_permissions();
	if (retval)
		return retval;

	dump_config_dev_list();
	dump_perm_dev_list();
	return retval;
}
Commit	Line	Data
2232cac8 GKH	1	/*
	2	* namedev.c
	3	*
	4	* Userspace devfs
	5	*
	6	* Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
	7	*
	8	*
	9	* This program is free software; you can redistribute it and/or modify it
	10	* under the terms of the GNU General Public License as published by the
	11	* Free Software Foundation version 2 of the License.
	12	*
	13	* This program is distributed in the hope that it will be useful, but
	14	* WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	16	* General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License along
	19	* with this program; if not, write to the Free Software Foundation, Inc.,
	20	* 675 Mass Ave, Cambridge, MA 02139, USA.
	21	*
	22	*/
	23
	24	#include <stddef.h>
	25	#include <stdlib.h>
	26	#include <string.h>
	27	#include <stdio.h>
	28	#include <fcntl.h>
	29	#include <ctype.h>
	30	#include <unistd.h>
	31	#include <errno.h>
c27e6911	32	#include <sys/wait.h>
2232cac8 GKH	33
	34	#include "list.h"
	35	#include "udev.h"
	36	#include "udev_version.h"
	37	#include "namedev.h"
185a35a4	38	#include "libsysfs/libsysfs.h"
2023350e	39	#include "klibc_fixups.h"
2232cac8	40
19feb351	41	LIST_HEAD(config_device_list);
61219c75	42	LIST_HEAD(perm_device_list);
2232cac8	43
9f1da361 KS	44	/* compare string with pattern (supports * ? [0-9] [!A-Z]) */
9f1da361 KS	45	static int strcmp_pattern(const char p, const char s)
c124eafa	46	{
9f1da361 KS	47	if (*s == '\0') {
	48	while (p == '')
	49	p++;
	50	return (*p != '\0');
	51	}
	52	switch (*p) {
	53	case '[':
	54	{
	55	int not = 0;
	56	p++;
	57	if (*p == '!') {
	58	not = 1;
	59	p++;
	60	}
	61	while (p && (p != ']')) {
	62	int match = 0;
	63	if (p[1] == '-') {
	64	if ((s >= p) && (*s <= p[2]))
	65	match = 1;
	66	p += 3;
	67	} else {
	68	match = (p == s);
	69	p++;
	70	}
	71	if (match ^ not) {
	72	while (p && (p != ']'))
	73	p++;
	74	return strcmp_pattern(p+1, s+1);
	75	}
	76	}
	77	}
	78	break;
	79	case '*':
	80	if (strcmp_pattern(p, s+1))
	81	return strcmp_pattern(p+1, s);
	82	return 0;
	83	case '\0':
	84	if (*s == '\0') {
	85	return 0;
	86	}
	87	break;
	88	default:
	89	if ((p == s) \|\| (*p == '?'))
	90	return strcmp_pattern(p+1, s+1);
	91	break;
	92	}
	93	return 1;
c124eafa KS	94	}
c124eafa KS	95
2232cac8 GKH	96	#define copy_var(a, b, var) \
2232cac8 GKH	97	if (b->var) \
469c7cff	98	a->var = b->var;
2232cac8 GKH	99
	100	#define copy_string(a, b, var) \
	101	if (strlen(b->var)) \
469c7cff	102	strcpy(a->var, b->var);
2232cac8	103
19feb351	104	int add_config_dev(struct config_device *new_dev)
2232cac8 GKH	105	{
	106	struct list_head *tmp;
	107	struct config_device *tmp_dev;
	108
09e52d51	109	/* update the values if we already have the device */
2232cac8 GKH	110	list_for_each(tmp, &config_device_list) {
2232cac8 GKH	111	struct config_device *dev = list_entry(tmp, struct config_device, node);
9f1da361	112	if (strcmp_pattern(new_dev->name, dev->name))
c124eafa	113	continue;
137af0cc GKH	114	if (strncmp(dev->bus, new_dev->bus, sizeof(dev->name)))
137af0cc GKH	115	continue;
09e52d51	116	copy_var(dev, new_dev, type);
09e52d51 KS	117	copy_string(dev, new_dev, bus);
	118	copy_string(dev, new_dev, sysfs_file);
	119	copy_string(dev, new_dev, sysfs_value);
	120	copy_string(dev, new_dev, id);
	121	copy_string(dev, new_dev, place);
	122	copy_string(dev, new_dev, kernel_name);
137af0cc	123	copy_string(dev, new_dev, exec_program);
3d150dfb	124	copy_string(dev, new_dev, symlink);
09e52d51	125	return 0;
2232cac8 GKH	126	}
2232cac8 GKH	127
8f43a65e	128	/* not found, add new structure to the device list */
2232cac8 GKH	129	tmp_dev = malloc(sizeof(*tmp_dev));
	130	if (!tmp_dev)
	131	return -ENOMEM;
	132	memcpy(tmp_dev, new_dev, sizeof(*tmp_dev));
8cf7ebe8	133	list_add_tail(&tmp_dev->node, &config_device_list);
19feb351	134	//dump_config_dev(tmp_dev);
469c7cff GKH	135	return 0;
469c7cff GKH	136	}
2232cac8	137
61219c75 GKH	138	int add_perm_dev(struct perm_device *new_dev)
	139	{
	140	struct list_head *tmp;
	141	struct perm_device *tmp_dev;
	142
	143	/* update the values if we already have the device */
	144	list_for_each(tmp, &perm_device_list) {
	145	struct perm_device *dev = list_entry(tmp, struct perm_device, node);
	146	if (strcmp_pattern(new_dev->name, dev->name))
	147	continue;
	148	copy_var(dev, new_dev, mode);
	149	copy_string(dev, new_dev, owner);
	150	copy_string(dev, new_dev, group);
	151	return 0;
	152	}
	153
	154	/* not found, add new structure to the perm list */
	155	tmp_dev = malloc(sizeof(*tmp_dev));
	156	if (!tmp_dev)
	157	return -ENOMEM;
	158	memcpy(tmp_dev, new_dev, sizeof(*tmp_dev));
	159	list_add_tail(&tmp_dev->node, &perm_device_list);
	160	//dump_perm_dev(tmp_dev);
	161	return 0;
	162	}
	163
	164	static struct perm_device find_perm(char name)
	165	{
	166	struct list_head *tmp;
	167	struct perm_device *perm = NULL;
	168
	169	list_for_each(tmp, &perm_device_list) {
	170	perm = list_entry(tmp, struct perm_device, node);
	171	if (strcmp_pattern(perm->name, name))
	172	continue;
	173	return perm;
	174	}
	175	return NULL;
	176	}
	177
c2405f50	178	static mode_t get_default_mode(struct sysfs_class_device *class_dev)
185a35a4	179	{
89571022 GKH	180	mode_t mode = 0600; /* default to owner rw only */
	181
	182	if (strlen(default_mode_str) != 0) {
	183	mode = strtol(default_mode_str, NULL, 8);
	184	}
	185	return mode;
185a35a4 GKH	186	}
185a35a4 GKH	187
f3b04a2e GKH	188	static void build_kernel_number(struct sysfs_class_device class_dev, struct udevice udev)
	189	{
	190	char *dig;
	191
	192	/* FIXME, figure out how to handle stuff like sdaj which will not work right now. */
	193	dig = class_dev->name + strlen(class_dev->name);
	194	while (isdigit(*(dig-1)))
	195	dig--;
	196	strfieldcpy(udev->kernel_number, dig);
f7b4eca4	197	dbg("kernel_number='%s'", udev->kernel_number);
f3b04a2e GKH	198	}
	199
	200	static void apply_format(struct udevice udev, unsigned char string)
	201	{
	202	char name[NAME_SIZE];
b1c5e333 KS	203	char temp[NAME_SIZE];
b1c5e333 KS	204	char *tail;
f3b04a2e	205	char *pos;
b1c5e333 KS	206	char *pos2;
	207	char *pos3;
	208	int num;
f3b04a2e GKH	209
f3b04a2e GKH	210	while (1) {
b1c5e333	211	num = 0;
f3b04a2e GKH	212	pos = strchr(string, '%');
	213
	214	if (pos) {
b1c5e333 KS	215	*pos = '\0';
	216	tail = pos+1;
	217	if (isdigit(tail[0])) {
	218	num = (int) strtoul(&pos[1], &tail, 10);
	219	if (tail == NULL) {
	220	dbg("format parsing error '%s'", pos+1);
	221	break;
	222	}
	223	}
	224	strfieldcpy(name, tail+1);
	225
	226	switch (tail[0]) {
f3b04a2e GKH	227	case 'b':
	228	if (strlen(udev->bus_id) == 0)
	229	break;
6968d494	230	strcat(pos, udev->bus_id);
f3b04a2e GKH	231	dbg("substitute bus_id '%s'", udev->bus_id);
	232	break;
	233	case 'n':
	234	if (strlen(udev->kernel_number) == 0)
	235	break;
	236	strcat(pos, udev->kernel_number);
	237	dbg("substitute kernel number '%s'", udev->kernel_number);
	238	break;
5c6f0f14 AB	239	case 'D':
5c6f0f14 AB	240	if (strlen(udev->kernel_number) == 0) {
525d07e7	241	strcat(pos, "disc");
5c6f0f14 AB	242	break;
	243	}
	244	strcat(pos, "part");
	245	strcat(pos, udev->kernel_number);
	246	dbg("substitute kernel number '%s'", udev->kernel_number);
	247	break;
f3b04a2e GKH	248	case 'm':
	249	sprintf(pos, "%u", udev->minor);
	250	dbg("substitute minor number '%u'", udev->minor);
	251	break;
	252	case 'M':
	253	sprintf(pos, "%u", udev->major);
	254	dbg("substitute major number '%u'", udev->major);
	255	break;
	256	case 'c':
	257	if (strlen(udev->callout_value) == 0)
	258	break;
b1c5e333 KS	259	if (num) {
	260	/* get part of return string */
	261	strncpy(temp, udev->callout_value, sizeof(temp));
	262	pos2 = temp;
	263	while (num) {
	264	num--;
	265	pos3 = strsep(&pos2, " ");
	266	if (pos3 == NULL) {
	267	dbg("requested part of callout string not found");
	268	break;
	269	}
	270	}
	271	strcat(pos, pos3);
	272	dbg("substitute partial callout output '%s'", pos3);
	273	} else {
	274	strcat(pos, udev->callout_value);
	275	dbg("substitute callout output '%s'", udev->callout_value);
	276	}
f3b04a2e GKH	277	break;
	278	default:
	279	dbg("unknown substitution type '%%%c'", pos[1]);
	280	break;
	281	}
	282	strcat(string, name);
	283	} else
	284	break;
	285	}
	286	}
	287
19dc5d4c	288
c27e6911 PM	289	static int exec_callout(struct config_device dev, char value, int len)
	290	{
	291	int retval;
	292	int res;
	293	int status;
	294	int fds[2];
	295	pid_t pid;
	296	int value_set = 0;
	297	char buffer[256];
20524642	298	char *pos;
bc434511 KS	299	char *args[CALLOUT_MAXARG];
bc434511 KS	300	int i;
c27e6911	301
8f43a65e	302	dbg("callout to '%s'", dev->exec_program);
c27e6911 PM	303	retval = pipe(fds);
	304	if (retval != 0) {
	305	dbg("pipe failed");
	306	return -1;
	307	}
	308	pid = fork();
	309	if (pid == -1) {
	310	dbg("fork failed");
	311	return -1;
	312	}
	313
	314	if (pid == 0) {
8f43a65e	315	/* child */
c27e6911 PM	316	close(STDOUT_FILENO);
c27e6911 PM	317	dup(fds[1]); /* dup write side of pipe to STDOUT */
bc434511 KS	318	if (strchr(dev->exec_program, ' ')) {
bc434511 KS	319	/* callout with arguments */
20524642	320	pos = dev->exec_program;
bc434511	321	for (i=0; i < CALLOUT_MAXARG-1; i++) {
20524642	322	args[i] = strsep(&pos, " ");
bc434511 KS	323	if (args[i] == NULL)
	324	break;
	325	}
	326	if (args[i]) {
53dc383e	327	dbg("too many args - %d", i);
bc434511 KS	328	args[i] = NULL;
	329	}
	330	retval = execve(args[0], args, main_envp);
	331	} else {
	332	retval = execve(dev->exec_program, main_argv, main_envp);
	333	}
c27e6911 PM	334	if (retval != 0) {
	335	dbg("child execve failed");
	336	exit(1);
	337	}
	338	return -1; /* avoid compiler warning */
	339	} else {
8f43a65e	340	/* parent reads from fds[0] */
c27e6911 PM	341	close(fds[1]);
	342	retval = 0;
	343	while (1) {
	344	res = read(fds[0], buffer, sizeof(buffer) - 1);
	345	if (res <= 0)
	346	break;
	347	buffer[res] = '\0';
	348	if (res > len) {
f7b4eca4	349	dbg("callout len %d too short", len);
c27e6911 PM	350	retval = -1;
	351	}
	352	if (value_set) {
	353	dbg("callout value already set");
	354	retval = -1;
	355	} else {
	356	value_set = 1;
	357	strncpy(value, buffer, len);
20524642 KS	358	pos = value + strlen(value)-1;
	359	if (pos[0] == '\n')
	360	pos[0] = '\0';
	361	dbg("callout returned '%s'", value);
c27e6911 PM	362	}
	363	}
	364	close(fds[0]);
	365	res = wait(&status);
	366	if (res < 0) {
	367	dbg("wait failed result %d", res);
	368	retval = -1;
	369	}
	370
1e959a4b	371	#ifndef __KLIBC__
c27e6911 PM	372	if (!WIFEXITED(status) \|\| (WEXITSTATUS(status) != 0)) {
	373	dbg("callout program status 0x%x", status);
	374	retval = -1;
	375	}
1e959a4b	376	#endif
c27e6911 PM	377	}
	378	return retval;
	379	}
	380
137af0cc	381	static int do_callout(struct sysfs_class_device class_dev, struct udevice udev, struct sysfs_device *sysfs_device)
120d45d0 GKH	382	{
	383	struct config_device *dev;
	384	struct list_head *tmp;
120d45d0 GKH	385
	386	list_for_each(tmp, &config_device_list) {
	387	dev = list_entry(tmp, struct config_device, node);
	388	if (dev->type != CALLOUT)
	389	continue;
f3b04a2e	390
137af0cc	391	if (sysfs_device) {
19feb351	392	dbg("dev->bus='%s' sysfs_device->bus='%s'", dev->bus, sysfs_device->bus);
137af0cc GKH	393	if (strcasecmp(dev->bus, sysfs_device->bus) != 0)
	394	continue;
	395	}
	396
f3b04a2e GKH	397	/* substitute anything that needs to be in the program name */
	398	apply_format(udev, dev->exec_program);
	399	if (exec_callout(dev, udev->callout_value, NAME_SIZE))
120d45d0	400	continue;
9f1da361	401	if (strcmp_pattern(dev->id, udev->callout_value) != 0)
120d45d0	402	continue;
70033702	403	strfieldcpy(udev->name, dev->name);
3d150dfb	404	strfieldcpy(udev->symlink, dev->symlink);
61219c75 GKH	405	dbg("callout returned matching value '%s', '%s' becomes '%s'",
61219c75 GKH	406	dev->id, class_dev->name, udev->name);
120d45d0 GKH	407	return 0;
	408	}
	409	return -ENODEV;
	410	}
	411
ca1cc0fe GKH	412	static int do_label(struct sysfs_class_device class_dev, struct udevice udev, struct sysfs_device *sysfs_device)
	413	{
	414	struct sysfs_attribute *tmpattr = NULL;
	415	struct config_device *dev;
	416	struct list_head *tmp;
28d6536a	417	char *c;
ca1cc0fe GKH	418
	419	list_for_each(tmp, &config_device_list) {
	420	dev = list_entry(tmp, struct config_device, node);
	421	if (dev->type != LABEL)
	422	continue;
	423
137af0cc	424	if (sysfs_device) {
19feb351	425	dbg("dev->bus='%s' sysfs_device->bus='%s'", dev->bus, sysfs_device->bus);
137af0cc GKH	426	if (strcasecmp(dev->bus, sysfs_device->bus) != 0)
	427	continue;
	428	}
	429
19feb351	430	dbg("look for device attribute '%s'", dev->sysfs_file);
ca1cc0fe GKH	431	/* try to find the attribute in the class device directory */
	432	tmpattr = sysfs_get_classdev_attr(class_dev, dev->sysfs_file);
	433	if (tmpattr)
	434	goto label_found;
	435
	436	/* look in the class device directory if present */
	437	if (sysfs_device) {
	438	tmpattr = sysfs_get_device_attr(sysfs_device, dev->sysfs_file);
	439	if (tmpattr)
	440	goto label_found;
	441	}
	442
	443	continue;
	444
	445	label_found:
28d6536a KS	446	c = tmpattr->value + strlen(tmpattr->value)-1;
	447	if (*c == '\n')
	448	*c = 0x00;
19feb351	449	dbg("compare attribute '%s' value '%s' with '%s'",
8f43a65e	450	dev->sysfs_file, tmpattr->value, dev->sysfs_value);
83be97ba	451	if (strcmp_pattern(dev->sysfs_value, tmpattr->value) != 0)
ca1cc0fe GKH	452	continue;
ca1cc0fe GKH	453
70033702	454	strfieldcpy(udev->name, dev->name);
3d150dfb	455	strfieldcpy(udev->symlink, dev->symlink);
61219c75 GKH	456	dbg("found matching attribute '%s', '%s' becomes '%s' ",
61219c75 GKH	457	dev->sysfs_file, class_dev->name, udev->name);
ca1cc0fe GKH	458
	459	return 0;
	460	}
	461	return -ENODEV;
	462	}
	463
	464	static int do_number(struct sysfs_class_device class_dev, struct udevice udev, struct sysfs_device *sysfs_device)
	465	{
	466	struct config_device *dev;
	467	struct list_head *tmp;
	468	char path[SYSFS_PATH_MAX];
	469	int found;
	470	char *temp = NULL;
	471
	472	/* we have to have a sysfs device for NUMBER to work */
	473	if (!sysfs_device)
	474	return -ENODEV;
	475
	476	list_for_each(tmp, &config_device_list) {
	477	dev = list_entry(tmp, struct config_device, node);
	478	if (dev->type != NUMBER)
	479	continue;
	480
19feb351	481	dbg("dev->bus='%s' sysfs_device->bus='%s'", dev->bus, sysfs_device->bus);
137af0cc GKH	482	if (strcasecmp(dev->bus, sysfs_device->bus) != 0)
	483	continue;
	484
ca1cc0fe	485	found = 0;
70033702	486	strfieldcpy(path, sysfs_device->path);
ca1cc0fe	487	temp = strrchr(path, '/');
19feb351	488	dbg("search '%s' in '%s', path='%s'", dev->id, temp, path);
ca1cc0fe GKH	489	if (strstr(temp, dev->id) != NULL) {
	490	found = 1;
	491	} else {
	492	*temp = 0x00;
	493	temp = strrchr(path, '/');
19feb351	494	dbg("search '%s' in '%s', path='%s'", dev->id, temp, path);
ca1cc0fe GKH	495	if (strstr(temp, dev->id) != NULL)
	496	found = 1;
	497	}
	498	if (!found)
	499	continue;
70033702	500	strfieldcpy(udev->name, dev->name);
3d150dfb	501	strfieldcpy(udev->symlink, dev->symlink);
61219c75 GKH	502	dbg("found matching id '%s', '%s' becomes '%s'",
61219c75 GKH	503	dev->id, class_dev->name, udev->name);
ca1cc0fe GKH	504	return 0;
	505	}
	506	return -ENODEV;
	507	}
	508
8c51bbfe GKH	509	static int do_topology(struct sysfs_class_device class_dev, struct udevice udev, struct sysfs_device *sysfs_device)
	510	{
	511	struct config_device *dev;
	512	struct list_head *tmp;
	513	char path[SYSFS_PATH_MAX];
	514	int found;
	515	char *temp = NULL;
	516
	517	/* we have to have a sysfs device for TOPOLOGY to work */
	518	if (!sysfs_device)
	519	return -ENODEV;
	520
	521	list_for_each(tmp, &config_device_list) {
	522	dev = list_entry(tmp, struct config_device, node);
	523	if (dev->type != TOPOLOGY)
	524	continue;
	525
19feb351	526	dbg("dev->bus='%s' sysfs_device->bus='%s'", dev->bus, sysfs_device->bus);
137af0cc GKH	527	if (strcasecmp(dev->bus, sysfs_device->bus) != 0)
	528	continue;
	529
20ff86bd	530	found = 0;
70033702	531	strfieldcpy(path, sysfs_device->path);
8c51bbfe	532	temp = strrchr(path, '/');
19feb351	533	dbg("search '%s' in '%s', path='%s'", dev->place, temp, path);
8c51bbfe GKH	534	if (strstr(temp, dev->place) != NULL) {
	535	found = 1;
	536	} else {
	537	*temp = 0x00;
	538	temp = strrchr(path, '/');
19feb351	539	dbg("search '%s' in '%s', path='%s'", dev->place, temp, path);
8c51bbfe GKH	540	if (strstr(temp, dev->place) != NULL)
	541	found = 1;
	542	}
	543	if (!found)
	544	continue;
	545
70033702	546	strfieldcpy(udev->name, dev->name);
3d150dfb	547	strfieldcpy(udev->symlink, dev->symlink);
61219c75 GKH	548	dbg("found matching place '%s', '%s' becomes '%s'",
61219c75 GKH	549	dev->place, class_dev->name, udev->name);
8c51bbfe GKH	550	return 0;
	551	}
	552	return -ENODEV;
	553	}
	554
137af0cc	555	static int do_replace(struct sysfs_class_device class_dev, struct udevice udev, struct sysfs_device *sysfs_device)
120d45d0 GKH	556	{
	557	struct config_device *dev;
	558	struct list_head *tmp;
	559
	560	list_for_each(tmp, &config_device_list) {
	561	dev = list_entry(tmp, struct config_device, node);
	562	if (dev->type != REPLACE)
	563	continue;
	564
19feb351	565	dbg("compare name '%s' with '%s'", dev->kernel_name, class_dev->name);
9f1da361	566	if (strcmp_pattern(dev->kernel_name, class_dev->name) != 0)
120d45d0 GKH	567	continue;
120d45d0 GKH	568
70033702	569	strfieldcpy(udev->name, dev->name);
3d150dfb	570	strfieldcpy(udev->symlink, dev->symlink);
61219c75	571	dbg("found name, '%s' becomes '%s'", dev->kernel_name, udev->name);
120d45d0 GKH	572
	573	return 0;
	574	}
	575	return -ENODEV;
	576	}
	577
09e52d51 KS	578	static void do_kernelname(struct sysfs_class_device class_dev, struct udevice udev)
09e52d51 KS	579	{
61219c75	580	/* heh, this is pretty simple... */
09e52d51	581	strfieldcpy(udev->name, class_dev->name);
09e52d51 KS	582	}
09e52d51 KS	583
5c6f0fb0	584	int namedev_name_device(struct sysfs_class_device class_dev, struct udevice udev)
185a35a4	585	{
7bd22a78 GKH	586	struct sysfs_device *sysfs_device = NULL;
7bd22a78 GKH	587	struct sysfs_class_device *class_dev_parent = NULL;
185a35a4	588	int retval = 0;
61219c75	589	struct perm_device *perm;
185a35a4	590
9d496c74	591	udev->mode = 0;
7bd22a78 GKH	592
7bd22a78 GKH	593	/* find the sysfs_device for this class device */
8a0c11d3	594	/* Wouldn't it really be nice if libsysfs could do this for us? */
5d4754f1 DS	595	sysfs_device = sysfs_get_classdev_device(class_dev);
5d4754f1 DS	596	if (sysfs_device == NULL) {
7bd22a78 GKH	597	/* bah, let's go backwards up a level to see if the device is there,
	598	* as block partitions don't point to the physical device. Need to fix that
	599	* up in the kernel...
	600	*/
5d4754f1	601	if (strcmp(class_dev->classname, SYSFS_BLOCK_NAME) == 0) {
19feb351	602	dbg("looking at block device");
7bd22a78	603	if (isdigit(class_dev->path[strlen(class_dev->path)-1])) {
19feb351	604	dbg("really is a partition");
5d4754f1 DS	605	class_dev_parent = sysfs_get_classdev_parent
5d4754f1 DS	606	(class_dev);
7bd22a78	607	if (class_dev_parent == NULL) {
5d4754f1	608	dbg("sysfs_get_classdev_parent for class device '%s' failed", class_dev->name);
7bd22a78	609	} else {
19feb351	610	dbg("class_dev_parent->name='%s'", class_dev_parent->name);
5d4754f1	611	sysfs_device = sysfs_get_classdev_device(class_dev_parent);
7bd22a78 GKH	612	}
	613	}
	614	}
	615	}
28d6536a	616
7bd22a78	617	if (sysfs_device) {
19feb351 GKH	618	dbg("sysfs_device->path='%s'", sysfs_device->path);
	619	dbg("sysfs_device->bus_id='%s'", sysfs_device->bus_id);
	620	dbg("sysfs_device->bus='%s'", sysfs_device->bus);
f3b04a2e	621	strfieldcpy(udev->bus_id, sysfs_device->bus_id);
03e64c8f	622	} else {
19feb351	623	dbg("class_dev->name = '%s'", class_dev->name);
03e64c8f	624	}
120d45d0	625
f3b04a2e GKH	626	build_kernel_number(class_dev, udev);
f3b04a2e GKH	627
120d45d0	628	/* rules are looked at in priority order */
137af0cc	629	retval = do_callout(class_dev, udev, sysfs_device);
120d45d0	630	if (retval == 0)
09e52d51	631	goto found;
120d45d0	632
ca1cc0fe GKH	633	retval = do_label(class_dev, udev, sysfs_device);
ca1cc0fe GKH	634	if (retval == 0)
09e52d51	635	goto found;
ca1cc0fe GKH	636
	637	retval = do_number(class_dev, udev, sysfs_device);
	638	if (retval == 0)
09e52d51	639	goto found;
ca1cc0fe	640
8c51bbfe GKH	641	retval = do_topology(class_dev, udev, sysfs_device);
8c51bbfe GKH	642	if (retval == 0)
09e52d51	643	goto found;
8c51bbfe	644
137af0cc	645	retval = do_replace(class_dev, udev, sysfs_device);
120d45d0	646	if (retval == 0)
09e52d51	647	goto found;
120d45d0	648
09e52d51 KS	649	do_kernelname(class_dev, udev);
09e52d51 KS	650	goto done;
c2405f50	651
09e52d51	652	found:
3d150dfb	653	/* substitute placeholder */
f3b04a2e	654	apply_format(udev, udev->name);
3d150dfb	655	apply_format(udev, udev->symlink);
98b88dbf	656
09e52d51	657	done:
61219c75 GKH	658	perm = find_perm(udev->name);
	659	if (perm) {
	660	udev->mode = perm->mode;
	661	strfieldcpy(udev->owner, perm->owner);
	662	strfieldcpy(udev->group, perm->group);
	663	} else {
	664	/* no matching perms found :( */
9d496c74 GKH	665	udev->mode = get_default_mode(class_dev);
	666	udev->owner[0] = 0x00;
	667	udev->group[0] = 0x00;
615e05f8	668	}
61219c75 GKH	669	dbg("name, '%s' is going to have owner='%s', group='%s', mode = %#o",
61219c75 GKH	670	udev->name, udev->owner, udev->group, udev->mode);
7bd22a78	671
120d45d0	672	return 0;
185a35a4 GKH	673	}
185a35a4 GKH	674
2232cac8 GKH	675	int namedev_init(void)
	676	{
	677	int retval;
28d6536a	678
e8baccca	679	retval = namedev_init_rules();
2232cac8 GKH	680	if (retval)
	681	return retval;
	682
	683	retval = namedev_init_permissions();
	684	if (retval)
	685	return retval;
	686
19feb351	687	dump_config_dev_list();
61219c75	688	dump_perm_dev_list();
2232cac8 GKH	689	return retval;
2232cac8 GKH	690	}