*
* Userspace devfs
*
- * Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
+ * Copyright (C) 2003,2004 Greg Kroah-Hartman <greg@kroah.com>
*
*
* This program is free software; you can redistribute it and/or modify it
*
*/
-/* define this to enable parsing debugging */
+#ifdef DEBUG
+/* define this to enable parsing debugging also */
/* #define DEBUG_PARSER */
+#endif
#include <stddef.h>
#include <stdlib.h>
#include <fcntl.h>
#include <ctype.h>
#include <unistd.h>
+#include <sys/stat.h>
+#include <dirent.h>
#include <errno.h>
#include "udev.h"
+#include "logging.h"
#include "namedev.h"
-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;
+LIST_HEAD(file_list);
- 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)
+static int add_config_dev(struct config_device *new_dev)
{
- 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;
+ 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)
{
- switch (dev->type) {
- case KERNEL_NAME:
- dbg_parse("KERNEL name='%s'", dev->name);
- break;
- case LABEL:
- dbg_parse("LABEL name='%s', bus='%s', sysfs_file='%s', sysfs_value='%s'",
- dev->name, dev->bus, dev->sysfs_file, dev->sysfs_value);
- break;
- case NUMBER:
- dbg_parse("NUMBER name='%s', bus='%s', id='%s'",
- dev->name, dev->bus, dev->id);
- break;
- case TOPOLOGY:
- dbg_parse("TOPOLOGY name='%s', bus='%s', place='%s'",
- dev->name, dev->bus, dev->place);
- break;
- case REPLACE:
- dbg_parse("REPLACE name=%s, kernel_name=%s",
- dev->name, dev->kernel_name);
- break;
- case CALLOUT:
- dbg_parse("CALLOUT name='%s', bus='%s', program='%s', id='%s'",
- dev->name, dev->bus, dev->exec_program, dev->id);
- break;
- default:
- dbg_parse("unknown type of method");
- }
+ 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'",
+ "owner='%s', group='%s', mode=%#o",
+ 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,
+ dev->owner, dev->group, dev->mode);
}
void dump_config_dev_list(void)
{
- struct list_head *tmp;
+ struct config_device *dev;
- list_for_each(tmp, &config_device_list) {
- struct config_device *dev = list_entry(tmp, struct config_device, node);
+ list_for_each_entry(dev, &config_device_list, node)
dump_config_dev(dev);
+}
+
+static int add_perm_dev(struct perm_device *new_dev)
+{
+ struct perm_device *dev;
+ struct perm_device *tmp_dev;
+
+ /* update the values if we already have the device */
+ list_for_each_entry(dev, &perm_device_list, node) {
+ if (strcmp(new_dev->name, dev->name) != 0)
+ continue;
+
+ set_empty_perms(dev, new_dev->mode, new_dev->owner, 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;
}
void dump_perm_dev(struct perm_device *dev)
void dump_perm_dev_list(void)
{
- struct list_head *tmp;
+ struct perm_device *dev;
- list_for_each(tmp, &perm_device_list) {
- struct perm_device *dev = list_entry(tmp, struct perm_device, node);
+ 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;
+ }
-int namedev_init_rules(void)
+ attr = strchr(str, '_');
+ if (attr != NULL) {
+ attr++;
+ dbg("attribute='%s'", attr);
+ return attr;
+ }
+
+ return NULL;
+}
+
+static int namedev_parse_rules(char *filename)
{
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");
+ fd = fopen(filename, "r");
if (fd != NULL) {
- dbg("reading '%s' as rules file", udev_rules_filename);
+ dbg("reading '%s' as rules file", filename);
} else {
- dbg("can't open '%s' as a rules file", udev_rules_filename);
+ dbg("can't open '%s' as a rules file", filename);
return -ENODEV;
}
if (temp == NULL)
goto exit;
lineno++;
-
dbg_parse("read '%s'", temp);
- /* eat the whitespace at the beginning of the line */
+ /* eat the whitespace */
while (isspace(*temp))
++temp;
/* empty line? */
- if (*temp == 0x00)
+ if ((*temp == '\0') || (*temp == '\n'))
continue;
/* see if this is a comment */
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);
+ /* get all known keys */
+ while (1) {
+ retval = parse_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, 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;
+ }
+
+ if (strcasecmp(temp2, FIELD_OWNER) == 0) {
+ strfieldcpy(dev.owner, temp3);
+ continue;
+ }
+
+ if (strcasecmp(temp2, FIELD_GROUP) == 0) {
+ strfieldcpy(dev.group, temp3);
+ continue;
+ }
+
+ if (strcasecmp(temp2, FIELD_MODE) == 0) {
+ dev.mode = strtol(temp3, NULL, 8);
+ continue;
+ }
+
+ dbg("unknown type of field '%s'", temp2);
+ goto error;
}
- 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);
+ /* simple plausibility checks 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 (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);
+ 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;
+ strfieldcpy(dev.config_file, filename);
retval = add_config_dev(&dev);
if (retval) {
dbg("add_config_dev returned with error %d", retval);
- goto exit;
+ continue;
+error:
+ dbg("%s:%d:%d: parse error, rule skipped",
+ filename, lineno, temp - line);
}
}
- dbg_parse("%s:%d:%Zd: error parsing '%s'", udev_rules_filename,
- lineno, temp - line, temp);
exit:
fclose(fd);
return retval;
-}
-
+}
-int namedev_init_permissions(void)
+static int namedev_parse_permissions(char *filename)
{
char line[255];
char *temp;
int retval = 0;
struct perm_device dev;
- fd = fopen(udev_permissions_filename, "r");
+ fd = fopen(filename, "r");
if (fd != NULL) {
- dbg("reading '%s' as permissions file", udev_permissions_filename);
+ dbg("reading '%s' as permissions file", filename);
} else {
- dbg("can't open '%s' as permissions file", udev_permissions_filename);
+ dbg("can't open '%s' as permissions file", filename);
return -ENODEV;
}
++temp;
/* empty line? */
- if (*temp == 0x00)
+ if ((*temp == '\0') || (*temp == '\n'))
continue;
/* see if this is a comment */
dbg("cannot parse line '%s'", line);
continue;
}
- strncpy(dev.name, temp2, sizeof(dev.name));
+ strfieldcpy(dev.name, temp2);
temp2 = strsep(&temp, ":");
if (!temp2) {
dbg("cannot parse line '%s'", line);
continue;
}
- strncpy(dev.owner, temp2, sizeof(dev.owner));
+ strfieldcpy(dev.owner, temp2);
temp2 = strsep(&temp, ":");
if (!temp2) {
dbg("cannot parse line '%s'", line);
continue;
}
- strncpy(dev.group, temp2, sizeof(dev.owner));
+ strfieldcpy(dev.group, temp2);
if (!temp) {
- dbg("cannot parse line: %s", line);
+ 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);
+ dev.name, dev.owner, dev.group, dev.mode);
+
retval = add_perm_dev(&dev);
if (retval) {
- dbg("add_config_dev returned with error %d", retval);
+ dbg("add_perm_dev returned with error %d", retval);
goto exit;
}
}
exit:
fclose(fd);
return retval;
-}
+}
+struct files {
+ struct list_head list;
+ char name[NAME_SIZE];
+};
+/* sort files in lexical order */
+static int file_list_insert(char *filename)
+{
+ struct files *loop_file;
+ struct files *new_file;
+
+ list_for_each_entry(loop_file, &file_list, list) {
+ if (strcmp(loop_file->name, filename) > 0) {
+ break;
+ }
+ }
+
+ new_file = malloc(sizeof(struct files));
+ if (new_file == NULL) {
+ dbg("error malloc");
+ return -ENOMEM;
+ }
+
+ strfieldcpy(new_file->name, filename);
+ list_add_tail(&new_file->list, &loop_file->list);
+ return 0;
+}
+
+/* calls function for file or every file found in directory */
+static int call_foreach_file(int parser (char *f) , char *filename, char *extension)
+{
+ struct dirent *ent;
+ DIR *dir;
+ char *ext;
+ char file[NAME_SIZE];
+ struct stat stats;
+ struct files *loop_file;
+ struct files *tmp_file;
+
+ /* look if we have a plain file or a directory to scan */
+ stat(filename, &stats);
+ if ((stats.st_mode & S_IFMT) != S_IFDIR)
+ return parser(filename);
+
+ /* sort matching filename into list */
+ dbg("open config as directory '%s'", filename);
+ dir = opendir(filename);
+ while (1) {
+ ent = readdir(dir);
+ if (ent == NULL || ent->d_name[0] == '\0')
+ break;
+
+ dbg("found file '%s'", ent->d_name);
+ ext = strrchr(ent->d_name, '.');
+ if (ext == NULL)
+ continue;
+
+ if (strcmp(ext, extension) == 0) {
+ dbg("put file in list '%s'", ent->d_name);
+ file_list_insert(ent->d_name);
+ }
+ }
+
+ /* parse every file in the list */
+ list_for_each_entry_safe(loop_file, tmp_file, &file_list, list) {
+ strfieldcpy(file, filename);
+ strfieldcat(file, loop_file->name);
+ parser(file);
+ list_del(&loop_file->list);
+ free(loop_file);
+ }
+
+ closedir(dir);
+ return 0;
+}
+
+int namedev_init_rules()
+{
+ return call_foreach_file(namedev_parse_rules, udev_rules_filename, RULEFILE_EXT);
+}
+
+int namedev_init_permissions()
+{
+ return call_foreach_file(namedev_parse_permissions, udev_permissions_filename, PERMFILE_EXT);
+}
~ianmdlvl / elogind.git / blobdiff