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Diffstat (limited to 'udev_rules_parse.c')
-rw-r--r--udev_rules_parse.c191
1 files changed, 142 insertions, 49 deletions
diff --git a/udev_rules_parse.c b/udev_rules_parse.c
index f77f3db915..ac4755fd37 100644
--- a/udev_rules_parse.c
+++ b/udev_rules_parse.c
@@ -73,6 +73,90 @@ void udev_rule_list_dump(void)
udev_rule_dump(rule);
}
+static int get_key(char **line, char **key, enum key_operation *operation, char **value)
+{
+ char *linepos;
+ char *temp;
+
+ linepos = *line;
+ if (!linepos)
+ return -1;
+
+ /* skip whitespace */
+ while (isspace(linepos[0]) || linepos[0] == ',')
+ linepos++;
+
+ /* get the key */
+ *key = linepos;
+ while (1) {
+ linepos++;
+ if (linepos[0] == '\0')
+ return -1;
+ if (isspace(linepos[0]))
+ break;
+ if (linepos[0] == '=')
+ break;
+ if (linepos[0] == '+')
+ break;
+ if (linepos[0] == '!')
+ break;
+ }
+
+ /* remember end of key */
+ temp = linepos;
+
+ /* skip whitespace after key */
+ while (isspace(linepos[0]))
+ linepos++;
+
+ /* get operation type */
+ if (linepos[0] == '=' && linepos[1] == '=') {
+ *operation = KEY_OP_MATCH;
+ linepos += 2;
+ dbg("operator=match");
+ } else if (linepos[0] == '!' && linepos[1] == '=') {
+ *operation = KEY_OP_NOMATCH;
+ linepos += 2;
+ dbg("operator=nomatch");
+ } else if (linepos[0] == '+' && linepos[1] == '=') {
+ *operation = KEY_OP_ADD;
+ linepos += 2;
+ dbg("operator=add");
+ } else if (linepos[0] == '=') {
+ *operation = KEY_OP_ASSIGN;
+ linepos++;
+ dbg("operator=assign");
+ } else
+ return -1;
+
+ /* terminate key */
+ temp[0] = '\0';
+ dbg("key='%s'", *key);
+
+ /* skip whitespace after operator */
+ while (isspace(linepos[0]))
+ linepos++;
+
+ /* get the value*/
+ if (linepos[0] == '"')
+ linepos++;
+ else
+ return -1;
+ *value = linepos;
+
+ temp = strchr(linepos, '"');
+ if (!temp)
+ return -1;
+ temp[0] = '\0';
+ temp++;
+ dbg("value='%s'", *value);
+
+ /* move line to next key */
+ *line = temp;
+
+ return 0;
+}
+
/* extract possible KEY{attr} */
static char *get_key_attribute(char *str)
{
@@ -100,9 +184,7 @@ 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 *linepos;
char *attr;
char *buf;
size_t bufsize;
@@ -113,12 +195,11 @@ static int rules_parse(struct udevice *udev, const char *filename)
int retval = 0;
struct udev_rule rule;
- if (file_map(filename, &buf, &bufsize) == 0) {
- dbg("reading '%s' as rules file", filename);
- } else {
+ if (file_map(filename, &buf, &bufsize) != 0) {
dbg("can't open '%s' as rules file", filename);
return -1;
}
+ dbg("reading '%s' as rules file", filename);
/* loop through the whole file */
cur = 0;
@@ -160,39 +241,47 @@ static int rules_parse(struct udevice *udev, const char *filename)
/* get all known keys */
memset(&rule, 0x00, sizeof(struct udev_rule));
- temp = line;
+ linepos = line;
valid = 0;
while (1) {
- retval = parse_get_pair(&temp, &temp2, &temp3);
+ char *key;
+ char *value;
+ enum key_operation operation = KEY_OP_UNKNOWN;
+
+ retval = get_key(&linepos, &key, &operation, &value);
if (retval)
break;
- if (strcasecmp(temp2, FIELD_KERNEL) == 0) {
- strlcpy(rule.kernel, temp3, sizeof(rule.kernel));
+ if (strcasecmp(key, KEY_KERNEL) == 0) {
+ strlcpy(rule.kernel, value, sizeof(rule.kernel));
+ rule.kernel_operation = operation;
valid = 1;
continue;
}
- if (strcasecmp(temp2, FIELD_SUBSYSTEM) == 0) {
- strlcpy(rule.subsystem, temp3, sizeof(rule.subsystem));
+ if (strcasecmp(key, KEY_SUBSYSTEM) == 0) {
+ strlcpy(rule.subsystem, value, sizeof(rule.subsystem));
+ rule.subsystem_operation = operation;
valid = 1;
continue;
}
- if (strcasecmp(temp2, FIELD_BUS) == 0) {
- strlcpy(rule.bus, temp3, sizeof(rule.bus));
+ if (strcasecmp(key, KEY_BUS) == 0) {
+ strlcpy(rule.bus, value, sizeof(rule.bus));
+ rule.bus_operation = operation;
valid = 1;
continue;
}
- if (strcasecmp(temp2, FIELD_ID) == 0) {
- strlcpy(rule.id, temp3, sizeof(rule.id));
+ if (strcasecmp(key, KEY_ID) == 0) {
+ strlcpy(rule.id, value, sizeof(rule.id));
+ rule.id_operation = operation;
valid = 1;
continue;
}
- if (strncasecmp(temp2, FIELD_SYSFS, sizeof(FIELD_SYSFS)-1) == 0) {
+ if (strncasecmp(key, KEY_SYSFS, sizeof(KEY_SYSFS)-1) == 0) {
struct sysfs_pair *pair = &rule.sysfs_pair[0];
int sysfs_pair_num = 0;
@@ -206,39 +295,43 @@ static int rules_parse(struct udevice *udev, const char *filename)
++pair;
}
if (pair) {
- attr = get_key_attribute(temp2 + sizeof(FIELD_SYSFS)-1);
+ attr = get_key_attribute(key + sizeof(KEY_SYSFS)-1);
if (attr == NULL) {
- dbg("error parsing " FIELD_SYSFS " attribute");
+ dbg("error parsing " KEY_SYSFS " attribute");
continue;
}
strlcpy(pair->file, attr, sizeof(pair->file));
- strlcpy(pair->value, temp3, sizeof(pair->value));
+ strlcpy(pair->value, value, sizeof(pair->value));
+ pair->operation = operation;
valid = 1;
}
continue;
}
- if (strcasecmp(temp2, FIELD_DRIVER) == 0) {
- strlcpy(rule.driver, temp3, sizeof(rule.driver));
+ if (strcasecmp(key, KEY_DRIVER) == 0) {
+ strlcpy(rule.driver, value, sizeof(rule.driver));
+ rule.driver_operation = operation;
valid = 1;
continue;
}
- if (strcasecmp(temp2, FIELD_PROGRAM) == 0) {
- program_given = 1;
- strlcpy(rule.program, temp3, sizeof(rule.program));
+ if (strcasecmp(key, KEY_RESULT) == 0) {
+ strlcpy(rule.result, value, sizeof(rule.result));
+ rule.result_operation = operation;
valid = 1;
continue;
}
- if (strcasecmp(temp2, FIELD_RESULT) == 0) {
- strlcpy(rule.result, temp3, sizeof(rule.result));
+ if (strcasecmp(key, KEY_PROGRAM) == 0) {
+ strlcpy(rule.program, value, sizeof(rule.program));
+ rule.program_operation = operation;
+ program_given = 1;
valid = 1;
continue;
}
- if (strncasecmp(temp2, FIELD_NAME, sizeof(FIELD_NAME)-1) == 0) {
- attr = get_key_attribute(temp2 + sizeof(FIELD_NAME)-1);
+ if (strncasecmp(key, KEY_NAME, sizeof(KEY_NAME)-1) == 0) {
+ attr = get_key_attribute(key + sizeof(KEY_NAME)-1);
/* FIXME: remove old style options and make OPTIONS= mandatory */
if (attr != NULL) {
if (strstr(attr, OPTION_PARTITIONS) != NULL) {
@@ -250,52 +343,52 @@ static int rules_parse(struct udevice *udev, const char *filename)
rule.ignore_remove = 1;
}
}
- if (temp3[0] != '\0')
- strlcpy(rule.name, temp3, sizeof(rule.name));
+ if (value[0] != '\0')
+ strlcpy(rule.name, value, sizeof(rule.name));
else
rule.ignore_device = 1;
valid = 1;
continue;
}
- if (strcasecmp(temp2, FIELD_SYMLINK) == 0) {
- strlcpy(rule.symlink, temp3, sizeof(rule.symlink));
+ if (strcasecmp(key, KEY_SYMLINK) == 0) {
+ strlcpy(rule.symlink, value, sizeof(rule.symlink));
valid = 1;
continue;
}
- if (strcasecmp(temp2, FIELD_OWNER) == 0) {
- strlcpy(rule.owner, temp3, sizeof(rule.owner));
+ if (strcasecmp(key, KEY_OWNER) == 0) {
+ strlcpy(rule.owner, value, sizeof(rule.owner));
valid = 1;
continue;
}
- if (strcasecmp(temp2, FIELD_GROUP) == 0) {
- strlcpy(rule.group, temp3, sizeof(rule.group));
+ if (strcasecmp(key, KEY_GROUP) == 0) {
+ strlcpy(rule.group, value, sizeof(rule.group));
valid = 1;
continue;
}
- if (strcasecmp(temp2, FIELD_MODE) == 0) {
- rule.mode = strtol(temp3, NULL, 8);
+ if (strcasecmp(key, KEY_MODE) == 0) {
+ rule.mode = strtol(value, NULL, 8);
valid = 1;
continue;
}
- if (strcasecmp(temp2, FIELD_OPTIONS) == 0) {
- if (strstr(temp3, OPTION_LAST_RULE) != NULL) {
+ if (strcasecmp(key, KEY_OPTIONS) == 0) {
+ if (strstr(value, OPTION_LAST_RULE) != NULL) {
dbg("last rule to be applied");
rule.last_rule = 1;
}
- if (strstr(temp3, OPTION_IGNORE_DEVICE) != NULL) {
+ if (strstr(value, OPTION_IGNORE_DEVICE) != NULL) {
dbg("device should be ignored");
rule.ignore_device = 1;
}
- if (strstr(temp3, OPTION_IGNORE_REMOVE) != NULL) {
+ if (strstr(value, OPTION_IGNORE_REMOVE) != NULL) {
dbg("remove event should be ignored");
rule.ignore_remove = 1;
}
- if (strstr(temp3, OPTION_PARTITIONS) != NULL) {
+ if (strstr(value, OPTION_PARTITIONS) != NULL) {
dbg("creation of partition nodes requested");
rule.partitions = DEFAULT_PARTITIONS_COUNT;
}
@@ -303,7 +396,7 @@ static int rules_parse(struct udevice *udev, const char *filename)
continue;
}
- dbg("unknown type of field '%s'", temp2);
+ dbg("unknown key '%s'", key);
goto error;
}
@@ -314,13 +407,13 @@ static int rules_parse(struct udevice *udev, const char *filename)
/* 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");
+ info("inconsistency in " KEY_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");
+ info(KEY_RESULT " is only useful when "
+ KEY_PROGRAM " is called in any rule before");
goto error;
}
@@ -332,7 +425,7 @@ static int rules_parse(struct udevice *udev, const char *filename)
continue;
error:
info("parse error %s, line %d:%d, rule skipped",
- filename, lineno, (int) (temp - line));
+ filename, lineno, (int) (linepos - line));
}
}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-23 23:51:21 +0000