[thirdparty/systemd.git] / namedev_parse.c

/*
 * namedev_parse.c
 *
 * Userspace devfs
 *
 * Copyright (C) 2003,2004 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.
 *
 */

#ifdef DEBUG
/* define this to enable parsing debugging also */
/* #define DEBUG_PARSER */
#endif

#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 "udev.h"
#include "logging.h"
#include "namedev.h"

static int add_config_dev(struct config_device *new_dev)
{
	struct config_device *tmp_dev;

	tmp_dev = malloc(sizeof(*tmp_dev));
	if (tmp_dev == NULL)
		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;
}

void dump_config_dev(struct config_device *dev)
{
	/*FIXME dump all sysfs's */
	dbg_parse("name='%s', symlink='%s', bus='%s', place='%s', id='%s', "
		  "sysfs_file[0]='%s', sysfs_value[0]='%s', "
		  "kernel='%s', program='%s', result='%s'",
		  dev->name, dev->symlink, dev->bus, dev->place, dev->id,
		  dev->sysfs_pair[0].file, dev->sysfs_pair[0].value,
		  dev->kernel, dev->program, dev->result);
}

void dump_config_dev_list(void)
{
	struct config_device *dev;

	list_for_each_entry(dev, &config_device_list, node)
		dump_config_dev(dev);
}

void dump_perm_dev(struct perm_device *dev)
{
	dbg_parse("name='%s', owner='%s', group='%s', mode=%#o",
		  dev->name, dev->owner, dev->group, dev->mode);
}

void dump_perm_dev_list(void)
{
	struct perm_device *dev;

	list_for_each_entry(dev, &perm_device_list, node)
		dump_perm_dev(dev);
}

/* extract possible KEY{attr} or KEY_attr */
static char *get_key_attribute(char *str)
{
	char *pos;
	char *attr;

	attr = strchr(str, '{');
	if (attr != NULL) {
		attr++;
		pos = strchr(attr, '}');
		if (pos == NULL) {
			dbg("missing closing brace for format");
			return NULL;
		}
		pos[0] = '\0';
		dbg("attribute='%s'", attr);
		return attr;
	}

	attr = strchr(str, '_');
	if (attr != NULL) {
		attr++;
		dbg("attribute='%s'", attr);
		return attr;
	}

	return NULL;
}

int namedev_init_rules(void)
{
	char line[255];
	int lineno;
	char *temp;
	char *temp2;
	char *temp3;
	char *attr;
	FILE *fd;
	int program_given = 0;
	int retval = 0;
	struct config_device dev;

	fd = fopen(udev_rules_filename, "r");
	if (fd != NULL) {
		dbg("reading '%s' as rules file", udev_rules_filename);
	} else {
		dbg("can't open '%s' as a rules file", udev_rules_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 */
		while (isspace(*temp))
			++temp;

		/* empty line? */
		if ((*temp == '\0') || (*temp == '\n'))
			continue;

		/* see if this is a comment */
		if (*temp == COMMENT_CHARACTER)
			continue;

		memset(&dev, 0x00, sizeof(struct config_device));

		/* get all known keys */
		while (1) {
			retval = parse_get_pair(&temp, &temp2, &temp3);
			if (retval)
				break;

			if (strcasecmp(temp2, FIELD_BUS) == 0) {
				strfieldcpy(dev.bus, temp3);
				continue;
			}

			if (strcasecmp(temp2, FIELD_ID) == 0) {
				strfieldcpy(dev.id, temp3);
				continue;
			}

			if (strcasecmp(temp2, FIELD_PLACE) == 0) {
				strfieldcpy(dev.place, temp3);
				continue;
			}

			if (strncasecmp(temp2, FIELD_SYSFS, sizeof(FIELD_SYSFS)-1) == 0) {
				struct sysfs_pair *pair = &dev.sysfs_pair[0];
				int sysfs_pair_num = 0;

				/* find first unused pair */
				while (pair->file[0] != '\0') {
					++sysfs_pair_num;
					if (sysfs_pair_num >= MAX_SYSFS_PAIRS) {
						pair = NULL;
						break;
					}
					++pair;
				}
				if (pair) {
					attr = get_key_attribute(temp2 + sizeof(FIELD_SYSFS)-1);
					if (attr == NULL) {
						dbg("error parsing " FIELD_SYSFS " attribute");
						continue;
					}
					strfieldcpy(pair->file, attr);
					strfieldcpy(pair->value, temp3);
				}
				continue;
			}

			if (strcasecmp(temp2, FIELD_KERNEL) == 0) {
				strfieldcpy(dev.kernel, temp3);
				continue;
			}

			if (strcasecmp(temp2, FIELD_PROGRAM) == 0) {
				program_given = 1;
				strfieldcpy(dev.program, temp3);
				continue;
			}

			if (strcasecmp(temp2, FIELD_RESULT) == 0) {
				strfieldcpy(dev.result, temp3);
				continue;
			}

			if (strncasecmp(temp2, FIELD_NAME, sizeof(FIELD_NAME)-1) == 0) {
				attr = get_key_attribute(temp2 + sizeof(FIELD_NAME)-1);
				if (attr != NULL)
					if (strcasecmp(attr, ATTR_PARTITIONS) == 0) {
						dbg_parse("creation of partition nodes requested");
						dev.partitions = PARTITIONS_COUNT;
					}
				strfieldcpy(dev.name, temp3);
				continue;
			}

			if (strcasecmp(temp2, FIELD_SYMLINK) == 0) {
				strfieldcpy(dev.symlink, temp3);
				continue;
			}

			dbg("unknown type of field '%s'", temp2);
			dbg("You might be using a rules file in the old format, please fix.");
			goto error;
		}

		/* simple plausibility check for given keys */
		if ((dev.sysfs_pair[0].file[0] == '\0') ^
		    (dev.sysfs_pair[0].value[0] == '\0')) {
			dbg("inconsistency in " FIELD_SYSFS " key");
			goto error;
		}

		if ((dev.result[0] != '\0') && (program_given == 0)) {
			dbg(FIELD_RESULT " is only useful when "
			    FIELD_PROGRAM " is called in any rule before");
			goto error;
		}

		dev.config_line = lineno;
		retval = add_config_dev(&dev);
		if (retval) {
			dbg("add_config_dev returned with error %d", retval);
			continue;
error:
			dbg("%s:%d:%d: parse error, rule skipped",
				  udev_rules_filename, lineno, temp - line);
		}
	}
exit:
	fclose(fd);
	return retval;
}

int namedev_init_permissions(void)
{
	char line[255];
	char *temp;
	char *temp2;
	FILE *fd;
	int retval = 0;
	struct perm_device dev;

	fd = fopen(udev_permissions_filename, "r");
	if (fd != NULL) {
		dbg("reading '%s' as permissions file", udev_permissions_filename);
	} else {
		dbg("can't open '%s' as permissions file", udev_permissions_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 == '\0') || (*temp == '\n'))
			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.group));

		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_perm_dev(&dev);
		if (retval) {
			dbg("add_perm_dev returned with error %d", retval);
			goto exit;
		}
	}

exit:
	fclose(fd);
	return retval;
}
Commit	Line	Data
19feb351 GKH	1	/*
	2	* namedev_parse.c
	3	*
	4	* Userspace devfs
	5	*
274812b5	6	* Copyright (C) 2003,2004 Greg Kroah-Hartman <greg@kroah.com>
19feb351 GKH	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
851cd18d GKH	24	#ifdef DEBUG
851cd18d GKH	25	/* define this to enable parsing debugging also */
19feb351	26	/* #define DEBUG_PARSER */
851cd18d	27	#endif
19feb351 GKH	28
	29	#include <stddef.h>
	30	#include <stdlib.h>
	31	#include <string.h>
	32	#include <stdio.h>
	33	#include <fcntl.h>
	34	#include <ctype.h>
	35	#include <unistd.h>
	36	#include <errno.h>
	37
	38	#include "udev.h"
54988802	39	#include "logging.h"
19feb351 GKH	40	#include "namedev.h"
19feb351 GKH	41
a8b01705 GKH	42	static int add_config_dev(struct config_device *new_dev)
	43	{
	44	struct config_device *tmp_dev;
	45
	46	tmp_dev = malloc(sizeof(*tmp_dev));
	47	if (tmp_dev == NULL)
	48	return -ENOMEM;
	49	memcpy(tmp_dev, new_dev, sizeof(*tmp_dev));
	50	list_add_tail(&tmp_dev->node, &config_device_list);
	51	//dump_config_dev(tmp_dev);
	52	return 0;
	53	}
	54
19feb351 GKH	55	void dump_config_dev(struct config_device *dev)
19feb351 GKH	56	{
ac28b86d KS	57	/FIXME dump all sysfs's /
	58	dbg_parse("name='%s', symlink='%s', bus='%s', place='%s', id='%s', "
	59	"sysfs_file[0]='%s', sysfs_value[0]='%s', "
	60	"kernel='%s', program='%s', result='%s'",
	61	dev->name, dev->symlink, dev->bus, dev->place, dev->id,
	62	dev->sysfs_pair[0].file, dev->sysfs_pair[0].value,
	63	dev->kernel, dev->program, dev->result);
19feb351 GKH	64	}
	65
	66	void dump_config_dev_list(void)
	67	{
843d1a84	68	struct config_device *dev;
19feb351	69
843d1a84	70	list_for_each_entry(dev, &config_device_list, node)
19feb351	71	dump_config_dev(dev);
19feb351	72	}
61219c75 GKH	73
	74	void dump_perm_dev(struct perm_device *dev)
	75	{
	76	dbg_parse("name='%s', owner='%s', group='%s', mode=%#o",
	77	dev->name, dev->owner, dev->group, dev->mode);
	78	}
	79
	80	void dump_perm_dev_list(void)
	81	{
843d1a84	82	struct perm_device *dev;
61219c75	83
843d1a84	84	list_for_each_entry(dev, &perm_device_list, node)
61219c75	85	dump_perm_dev(dev);
61219c75 GKH	86	}
61219c75 GKH	87
bb738647 KS	88	/* extract possible KEY{attr} or KEY_attr */
	89	static char get_key_attribute(char str)
	90	{
	91	char *pos;
	92	char *attr;
	93
bb738647 KS	94	attr = strchr(str, '{');
	95	if (attr != NULL) {
	96	attr++;
	97	pos = strchr(attr, '}');
	98	if (pos == NULL) {
	99	dbg("missing closing brace for format");
	100	return NULL;
	101	}
	102	pos[0] = '\0';
	103	dbg("attribute='%s'", attr);
	104	return attr;
	105	}
	106
50e5de03 KS	107	attr = strchr(str, '_');
	108	if (attr != NULL) {
	109	attr++;
	110	dbg("attribute='%s'", attr);
	111	return attr;
	112	}
	113
bb738647 KS	114	return NULL;
	115	}
	116
e8baccca	117	int namedev_init_rules(void)
19feb351 GKH	118	{
	119	char line[255];
	120	int lineno;
	121	char *temp;
	122	char *temp2;
	123	char *temp3;
bb738647	124	char *attr;
19feb351	125	FILE *fd;
ac28b86d	126	int program_given = 0;
19feb351 GKH	127	int retval = 0;
	128	struct config_device dev;
	129
e8baccca GKH	130	fd = fopen(udev_rules_filename, "r");
	131	if (fd != NULL) {
	132	dbg("reading '%s' as rules file", udev_rules_filename);
	133	} else {
	134	dbg("can't open '%s' as a rules file", udev_rules_filename);
19feb351 GKH	135	return -ENODEV;
	136	}
	137
	138	/* loop through the whole file */
	139	lineno = 0;
	140	while (1) {
	141	/* get a line */
	142	temp = fgets(line, sizeof(line), fd);
	143	if (temp == NULL)
	144	goto exit;
	145	lineno++;
19feb351 GKH	146	dbg_parse("read '%s'", temp);
19feb351 GKH	147
093bf8f4 RK	148	/* eat the whitespace */
	149	while (isspace(*temp))
	150	++temp;
	151
19feb351	152	/* empty line? */
e15b5ed5	153	if ((temp == '\0') \|\| (temp == '\n'))
19feb351 GKH	154	continue;
	155
	156	/* see if this is a comment */
	157	if (*temp == COMMENT_CHARACTER)
	158	continue;
	159
	160	memset(&dev, 0x00, sizeof(struct config_device));
	161
d94df232 KS	162	/* get all known keys */
d94df232 KS	163	while (1) {
274812b5	164	retval = parse_get_pair(&temp, &temp2, &temp3);
19feb351 GKH	165	if (retval)
19feb351 GKH	166	break;
3d150dfb	167
d94df232 KS	168	if (strcasecmp(temp2, FIELD_BUS) == 0) {
	169	strfieldcpy(dev.bus, temp3);
	170	continue;
	171	}
	172
	173	if (strcasecmp(temp2, FIELD_ID) == 0) {
	174	strfieldcpy(dev.id, temp3);
	175	continue;
	176	}
	177
	178	if (strcasecmp(temp2, FIELD_PLACE) == 0) {
	179	strfieldcpy(dev.place, temp3);
	180	continue;
	181	}
	182
	183	if (strncasecmp(temp2, FIELD_SYSFS, sizeof(FIELD_SYSFS)-1) == 0) {
a8b01705 GKH	184	struct sysfs_pair *pair = &dev.sysfs_pair[0];
	185	int sysfs_pair_num = 0;
	186
	187	/* find first unused pair */
	188	while (pair->file[0] != '\0') {
	189	++sysfs_pair_num;
	190	if (sysfs_pair_num >= MAX_SYSFS_PAIRS) {
	191	pair = NULL;
	192	break;
	193	}
	194	++pair;
	195	}
	196	if (pair) {
bb738647 KS	197	attr = get_key_attribute(temp2 + sizeof(FIELD_SYSFS)-1);
	198	if (attr == NULL) {
	199	dbg("error parsing " FIELD_SYSFS " attribute");
	200	continue;
	201	}
	202	strfieldcpy(pair->file, attr);
a8b01705 GKH	203	strfieldcpy(pair->value, temp3);
a8b01705 GKH	204	}
d94df232 KS	205	continue;
	206	}
	207
	208	if (strcasecmp(temp2, FIELD_KERNEL) == 0) {
ac28b86d	209	strfieldcpy(dev.kernel, temp3);
d94df232 KS	210	continue;
	211	}
	212
	213	if (strcasecmp(temp2, FIELD_PROGRAM) == 0) {
ac28b86d KS	214	program_given = 1;
	215	strfieldcpy(dev.program, temp3);
	216	continue;
	217	}
	218
	219	if (strcasecmp(temp2, FIELD_RESULT) == 0) {
	220	strfieldcpy(dev.result, temp3);
d94df232 KS	221	continue;
	222	}
	223
50e5de03 KS	224	if (strncasecmp(temp2, FIELD_NAME, sizeof(FIELD_NAME)-1) == 0) {
	225	attr = get_key_attribute(temp2 + sizeof(FIELD_NAME)-1);
	226	if (attr != NULL)
	227	if (strcasecmp(attr, ATTR_PARTITIONS) == 0) {
	228	dbg_parse("creation of partition nodes requested");
	229	dev.partitions = PARTITIONS_COUNT;
	230	}
d94df232 KS	231	strfieldcpy(dev.name, temp3);
	232	continue;
	233	}
	234
	235	if (strcasecmp(temp2, FIELD_SYMLINK) == 0) {
3d150dfb	236	strfieldcpy(dev.symlink, temp3);
d94df232 KS	237	continue;
d94df232 KS	238	}
3d150dfb	239
851cd18d GKH	240	dbg("unknown type of field '%s'", temp2);
	241	dbg("You might be using a rules file in the old format, please fix.");
	242	goto error;
d94df232 KS	243	}
d94df232 KS	244
ac28b86d KS	245	/* simple plausibility check for given keys */
	246	if ((dev.sysfs_pair[0].file[0] == '\0') ^
	247	(dev.sysfs_pair[0].value[0] == '\0')) {
bb738647	248	dbg("inconsistency in " FIELD_SYSFS " key");
ac28b86d KS	249	goto error;
	250	}
	251
	252	if ((dev.result[0] != '\0') && (program_given == 0)) {
bb738647 KS	253	dbg(FIELD_RESULT " is only useful when "
bb738647 KS	254	FIELD_PROGRAM " is called in any rule before");
d94df232	255	goto error;
19feb351 GKH	256	}
19feb351 GKH	257
54988802	258	dev.config_line = lineno;
19feb351 GKH	259	retval = add_config_dev(&dev);
	260	if (retval) {
	261	dbg("add_config_dev returned with error %d", retval);
d94df232	262	continue;
ac28b86d	263	error:
851cd18d	264	dbg("%s:%d:%d: parse error, rule skipped",
ac28b86d	265	udev_rules_filename, lineno, temp - line);
19feb351 GKH	266	}
19feb351 GKH	267	}
19feb351 GKH	268	exit:
	269	fclose(fd);
	270	return retval;
d94df232	271	}
19feb351 GKH	272
	273	int namedev_init_permissions(void)
	274	{
	275	char line[255];
	276	char *temp;
	277	char *temp2;
	278	FILE *fd;
	279	int retval = 0;
61219c75	280	struct perm_device dev;
19feb351	281
3836a3c4	282	fd = fopen(udev_permissions_filename, "r");
e8baccca	283	if (fd != NULL) {
3836a3c4	284	dbg("reading '%s' as permissions file", udev_permissions_filename);
e8baccca	285	} else {
3836a3c4	286	dbg("can't open '%s' as permissions file", udev_permissions_filename);
19feb351 GKH	287	return -ENODEV;
	288	}
	289
	290	/* loop through the whole file */
	291	while (1) {
	292	temp = fgets(line, sizeof(line), fd);
	293	if (temp == NULL)
	294	break;
	295
	296	dbg_parse("read '%s'", temp);
	297
	298	/* eat the whitespace at the beginning of the line */
	299	while (isspace(*temp))
	300	++temp;
	301
	302	/* empty line? */
e15b5ed5	303	if ((temp == '\0') \|\| (temp == '\n'))
19feb351 GKH	304	continue;
	305
	306	/* see if this is a comment */
	307	if (*temp == COMMENT_CHARACTER)
	308	continue;
	309
	310	memset(&dev, 0x00, sizeof(dev));
	311
	312	/* parse the line */
	313	temp2 = strsep(&temp, ":");
	314	if (!temp2) {
	315	dbg("cannot parse line '%s'", line);
	316	continue;
	317	}
	318	strncpy(dev.name, temp2, sizeof(dev.name));
	319
	320	temp2 = strsep(&temp, ":");
	321	if (!temp2) {
	322	dbg("cannot parse line '%s'", line);
	323	continue;
	324	}
	325	strncpy(dev.owner, temp2, sizeof(dev.owner));
	326
	327	temp2 = strsep(&temp, ":");
	328	if (!temp2) {
	329	dbg("cannot parse line '%s'", line);
	330	continue;
	331	}
eb7a964a	332	strncpy(dev.group, temp2, sizeof(dev.group));
19feb351 GKH	333
	334	if (!temp) {
	335	dbg("cannot parse line: %s", line);
	336	continue;
	337	}
	338	dev.mode = strtol(temp, NULL, 8);
	339
	340	dbg_parse("name='%s', owner='%s', group='%s', mode=%#o",
	341	dev.name, dev.owner, dev.group,
	342	dev.mode);
61219c75	343	retval = add_perm_dev(&dev);
19feb351	344	if (retval) {
3d150dfb	345	dbg("add_perm_dev returned with error %d", retval);
19feb351 GKH	346	goto exit;
	347	}
	348	}
	349
	350	exit:
	351	fclose(fd);
	352	return retval;
267f534d	353	}
19feb351	354