[PATCH] rename namedev_dev to udev_rule

1 files changed, 365 insertions, 0 deletions

diff --git a/udev_rules_parse.c b/udev_rules_parse.c
new file mode 100644
index 0000000000..4f431decf5
--- /dev/null
+++ b/udev_rules_parse.c
@@ -0,0 +1,365 @@
+/*
+ * udev_rules_parse.c
+ *
+ * Userspace devfs
+ *
+ * Copyright (C) 2003,2004 Greg Kroah-Hartman <greg@kroah.com>
+ * Copyright (C) 2003-2005 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.,
+ *	675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <errno.h>
+
+#include "udev_libc_wrapper.h"
+#include "udev.h"
+#include "udev_utils.h"
+#include "logging.h"
+#include "udev_rules.h"
+
+LIST_HEAD(udev_rule_list);
+
+static int add_config_dev(struct udev_rule *new_rule)
+{
+	struct udev_rule *tmp_rule;
+
+	tmp_rule = malloc(sizeof(*tmp_rule));
+	if (tmp_rule == NULL)
+		return -ENOMEM;
+	memcpy(tmp_rule, new_rule, sizeof(*tmp_rule));
+	list_add_tail(&tmp_rule->node, &udev_rule_list);
+	udev_rule_dump(tmp_rule);
+
+	return 0;
+}
+
+void udev_rule_dump(struct udev_rule *rule)
+{
+	dbg("name='%s', symlink='%s', bus='%s', id='%s', "
+	    "sysfs_file[0]='%s', sysfs_value[0]='%s', "
+	    "kernel='%s', program='%s', result='%s'"
+	    "owner='%s', group='%s', mode=%#o",
+	    rule->name, rule->symlink, rule->bus, rule->id,
+	    rule->sysfs_pair[0].file, rule->sysfs_pair[0].value,
+	    rule->kernel, rule->program, rule->result,
+	    rule->owner, rule->group, rule->mode);
+}
+
+void udev_rule_list_dump(void)
+{
+	struct udev_rule *rule;
+
+	list_for_each_entry(rule, &udev_rule_list, node)
+		udev_rule_dump(rule);
+}
+
+/* extract possible 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;
+	}
+
+	return NULL;
+}
+
+static int rules_parse(struct udevice *udev, const char *filename)
+{
+	char line[LINE_SIZE];
+	char *bufline;
+	int lineno;
+	char *temp;
+	char *temp2;
+	char *temp3;
+	char *attr;
+	char *buf;
+	size_t bufsize;
+	size_t cur;
+	size_t count;
+	int program_given = 0;
+	int valid;
+	int retval = 0;
+	struct udev_rule rule;
+
+	if (file_map(filename, &buf, &bufsize) == 0) {
+		dbg("reading '%s' as rules file", filename);
+	} else {
+		dbg("can't open '%s' as rules file", filename);
+		return -1;
+	}
+
+	/* loop through the whole file */
+	cur = 0;
+	lineno = 0;
+	while (cur < bufsize) {
+		unsigned int i, j;
+
+		count = buf_get_line(buf, bufsize, cur);
+		bufline = &buf[cur];
+		cur += count+1;
+		lineno++;
+
+		if (count >= sizeof(line)) {
+			info("line too long, rule skipped %s, line %d", filename, lineno);
+			continue;
+		}
+
+		/* 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;
+
+		/* skip backslash and newline from multi line rules */
+		for (i = j = 0; i < count; i++) {
+			if (bufline[i] == '\\' && bufline[i+1] == '\n')
+				continue;
+
+			line[j++] = bufline[i];
+		}
+		line[j] = '\0';
+		dbg("read '%s'", line);
+
+		/* get all known keys */
+		memset(&rule, 0x00, sizeof(struct udev_rule));
+		temp = line;
+		valid = 0;
+
+		while (1) {
+			retval = parse_get_pair(&temp, &temp2, &temp3);
+			if (retval)
+				break;
+
+			if (strcasecmp(temp2, FIELD_KERNEL) == 0) {
+				strlcpy(rule.kernel, temp3, sizeof(rule.kernel));
+				valid = 1;
+				continue;
+			}
+
+			if (strcasecmp(temp2, FIELD_SUBSYSTEM) == 0) {
+				strlcpy(rule.subsystem, temp3, sizeof(rule.subsystem));
+				valid = 1;
+				continue;
+			}
+
+			if (strcasecmp(temp2, FIELD_BUS) == 0) {
+				strlcpy(rule.bus, temp3, sizeof(rule.bus));
+				valid = 1;
+				continue;
+			}
+
+			if (strcasecmp(temp2, FIELD_ID) == 0) {
+				strlcpy(rule.id, temp3, sizeof(rule.id));
+				valid = 1;
+				continue;
+			}
+
+			if (strncasecmp(temp2, FIELD_SYSFS, sizeof(FIELD_SYSFS)-1) == 0) {
+				struct sysfs_pair *pair = &rule.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;
+					}
+					strlcpy(pair->file, attr, sizeof(pair->file));
+					strlcpy(pair->value, temp3, sizeof(pair->value));
+					valid = 1;
+				}
+				continue;
+			}
+
+			if (strcasecmp(temp2, FIELD_DRIVER) == 0) {
+				strlcpy(rule.driver, temp3, sizeof(rule.driver));
+				valid = 1;
+				continue;
+			}
+
+			if (strcasecmp(temp2, FIELD_PROGRAM) == 0) {
+				program_given = 1;
+				strlcpy(rule.program, temp3, sizeof(rule.program));
+				valid = 1;
+				continue;
+			}
+
+			if (strcasecmp(temp2, FIELD_RESULT) == 0) {
+				strlcpy(rule.result, temp3, sizeof(rule.result));
+				valid = 1;
+				continue;
+			}
+
+			if (strncasecmp(temp2, FIELD_NAME, sizeof(FIELD_NAME)-1) == 0) {
+				attr = get_key_attribute(temp2 + sizeof(FIELD_NAME)-1);
+				/* FIXME: remove old style options and make OPTIONS= mandatory */
+				if (attr != NULL) {
+					if (strstr(attr, OPTION_PARTITIONS) != NULL) {
+						dbg("creation of partition nodes requested");
+						rule.partitions = DEFAULT_PARTITIONS_COUNT;
+					}
+					if (strstr(attr, OPTION_IGNORE_REMOVE) != NULL) {
+						dbg("remove event should be ignored");
+						rule.ignore_remove = 1;
+					}
+				}
+				if (temp3[0] != '\0')
+					strlcpy(rule.name, temp3, sizeof(rule.name));
+				else
+					rule.ignore_device = 1;
+				valid = 1;
+				continue;
+			}
+
+			if (strcasecmp(temp2, FIELD_SYMLINK) == 0) {
+				strlcpy(rule.symlink, temp3, sizeof(rule.symlink));
+				valid = 1;
+				continue;
+			}
+
+			if (strcasecmp(temp2, FIELD_OWNER) == 0) {
+				strlcpy(rule.owner, temp3, sizeof(rule.owner));
+				valid = 1;
+				continue;
+			}
+
+			if (strcasecmp(temp2, FIELD_GROUP) == 0) {
+				strlcpy(rule.group, temp3, sizeof(rule.group));
+				valid = 1;
+				continue;
+			}
+
+			if (strcasecmp(temp2, FIELD_MODE) == 0) {
+				rule.mode = strtol(temp3, NULL, 8);
+				valid = 1;
+				continue;
+			}
+
+			if (strcasecmp(temp2, FIELD_OPTIONS) == 0) {
+				if (strstr(temp3, OPTION_IGNORE_DEVICE) != NULL) {
+					dbg("device should be ignored");
+					rule.ignore_device = 1;
+				}
+				if (strstr(temp3, OPTION_IGNORE_REMOVE) != NULL) {
+					dbg("remove event should be ignored");
+					rule.ignore_remove = 1;
+				}
+				if (strstr(temp3, OPTION_PARTITIONS) != NULL) {
+					dbg("creation of partition nodes requested");
+					rule.partitions = DEFAULT_PARTITIONS_COUNT;
+				}
+				valid = 1;
+				continue;
+			}
+
+			dbg("unknown type of field '%s'", temp2);
+			goto error;
+		}
+
+		/* skip line if not any valid key was found */
+		if (!valid)
+			goto error;
+
+		/* simple plausibility checks for given keys */
+		if ((rule.sysfs_pair[0].file[0] == '\0') ^
+		    (rule.sysfs_pair[0].value[0] == '\0')) {
+			info("inconsistency in " FIELD_SYSFS " key");
+			goto error;
+		}
+
+		if ((rule.result[0] != '\0') && (program_given == 0)) {
+			info(FIELD_RESULT " is only useful when "
+			     FIELD_PROGRAM " is called in any rule before");
+			goto error;
+		}
+
+		rule.config_line = lineno;
+		strlcpy(rule.config_file, filename, sizeof(rule.config_file));
+		retval = add_config_dev(&rule);
+		if (retval) {
+			dbg("add_config_dev returned with error %d", retval);
+			continue;
+error:
+			info("parse error %s, line %d:%d, rule skipped",
+			     filename, lineno, (int) (temp - line));
+		}
+	}
+
+	file_unmap(buf, bufsize);
+	return retval;
+}
+
+int udev_rules_init(void)
+{
+	struct stat stats;
+	int retval;
+
+	if (stat(udev_rules_filename, &stats) != 0)
+		return -1;
+
+	if ((stats.st_mode & S_IFMT) != S_IFDIR)
+		retval = rules_parse(NULL, udev_rules_filename);
+	else
+		retval = call_foreach_file(rules_parse, NULL, udev_rules_filename, RULEFILE_SUFFIX);
+
+	return retval;
+}
+
+void udev_rules_close(void)
+{
+	struct udev_rule *rule;
+	struct udev_rule *temp_rule;
+
+	list_for_each_entry_safe(rule, temp_rule, &udev_rule_list, node) {
+		list_del(&rule->node);
+		free(rule);
+	}
+}
+