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[PATCH] dev_d.c file sorting and cleanup

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On Thu, Mar 25, 2004 at 02:52:13AM +0100, Kay Sievers wrote:
> Please have look if it still works for you, I only did a very quick
> test.

Here is a unified version, with all the functions moved to udev_lib.c.
We have a generic function now, to call a given fnct(char *) for every
file ending with a specific suffix, sorted in lexical order. We use it
to execute the dev.d/ files and read our rules.d/ files. The binary
should be a bit smaller now.

I've also changed it, to not do the dev.d/ exec for net devices.
This commit is contained in:
kay.sievers@vrfy.org 2004-03-27 01:21:46 -08:00 committed by Greg KH
parent 949e32f224
commit 4a539daf1e
8 changed files with 151 additions and 171 deletions
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114
dev_d.c
View File

@ -1,30 +1,23 @@
/*
* dev.d multipleer
* dev_d.c - dev.d/ multiplexer
*
* Copyright (C) 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.
*
* Based on the klibc version of hotplug written by:
* Author(s) Christian Borntraeger <cborntra@de.ibm.com>
* which was based on the shell script written by:
* Greg Kroah-Hartman <greg@kroah.com>
*
*/
/*
/*
* This essentially emulates the following shell script logic in C:
DIR="/etc/dev.d"
export DEVNODE="whatever_dev_name_udev_just_gave"
for I in "${DIR}/$DEVNODE/"*.dev "${DIR}/$1/"*.dev "${DIR}/default/"*.dev ; do
if [ -f $I ]; then $I $1 ; fi
done
exit 1;
* DIR="/etc/dev.d"
* export DEVNODE="whatever_dev_name_udev_just_gave"
* for I in "${DIR}/$DEVNODE/"*.dev "${DIR}/$1/"*.dev "${DIR}/default/"*.dev ; do
* if [ -f $I ]; then $I $1 ; fi
* done
* exit 1;
*/
#include <dirent.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@ -35,73 +28,38 @@
#include "udev_lib.h"
#include "logging.h"
#define HOTPLUGDIR "/etc/dev.d"
#define SUFFIX ".dev"
#define COMMENT_PREFIX '#'
#define DEVD_DIR "/etc/dev.d/"
#define DEVD_SUFFIX ".dev"
static void run_program(char *name)
static int run_program(char *name)
{
pid_t pid;
dbg("running %s", name);
pid = fork();
if (pid < 0) {
perror("fork");
return;
}
if (pid > 0) {
switch (pid) {
case 0:
/* child */
execv(name, main_argv);
dbg("exec of child failed");
exit(1);
case -1:
dbg("fork of child failed");
break;
return -1;
default:
wait(NULL);
return;
}
execv(name, main_argv);
exit(1);
return 0;
}
static void execute_dir (char *dirname)
{
DIR *directory;
struct dirent *entry;
char filename[NAME_SIZE];
int name_len;
dbg("opening %s", dirname);
directory = opendir(dirname);
if (!directory)
return;
while ((entry = readdir(directory))) {
if (entry->d_name[0] == '\0')
break;
/* Don't run the files '.', '..', or hidden files,
* or files that start with a '#' */
if ((entry->d_name[0] == '.') ||
(entry->d_name[0] == COMMENT_PREFIX))
continue;
/* Nor do we run files that do not end in ".dev" */
name_len = strlen(entry->d_name);
if (name_len < strlen(SUFFIX))
continue;
if (strcmp(&entry->d_name[name_len - sizeof (SUFFIX) + 1], SUFFIX) != 0)
continue;
/* FIXME - need to use file_list_insert() here to run these in sorted order... */
snprintf(filename, sizeof(filename), "%s%s", dirname, entry->d_name);
filename[sizeof(filename)-1] = '\0';
run_program(filename);
}
closedir(directory);
}
/* runs files in these directories in order:
* name given by udev
* subsystem
* default
/*
* runs files in these directories in order:
* <node name given by udev>/
* subsystem/
* default/
*/
void dev_d_send(struct udevice *dev, char *subsystem)
{
@ -112,15 +70,15 @@ void dev_d_send(struct udevice *dev, char *subsystem)
strfieldcat(devnode, dev->name);
setenv("DEVNODE", devnode, 1);
snprintf(dirname, sizeof(dirname), HOTPLUGDIR "/%s/", dev->name);
dirname[sizeof(dirname)-1] = '\0';
execute_dir(dirname);
strcpy(dirname, DEVD_DIR);
strfieldcat(dirname, dev->name);
call_foreach_file(run_program, dirname, DEVD_SUFFIX);
snprintf(dirname, sizeof(dirname), HOTPLUGDIR "/%s/", subsystem);
dirname[sizeof(dirname)-1] = '\0';
execute_dir(dirname);
strcpy(dirname, DEVD_DIR);
strfieldcat(dirname, subsystem);
call_foreach_file(run_program, dirname, DEVD_SUFFIX);
strcpy(dirname, HOTPLUGDIR "/default/");
execute_dir(dirname);
strcpy(dirname, DEVD_DIR "default");
call_foreach_file(run_program, dirname, DEVD_SUFFIX);
}

4
namedev.h
View File

@ -53,8 +53,8 @@ struct sysfs_class_device;
#define MAX_SYSFS_PAIRS 5
#define RULEFILE_EXT ".rules"
#define PERMFILE_EXT ".permissions"
#define RULEFILE_SUFFIX ".rules"
#define PERMFILE_SUFFIX ".permissions"
#define set_empty_perms(dev, m, o, g) \
if (dev->mode == 0) \

97
namedev_parse.c
View File

@ -33,7 +33,6 @@
#include <ctype.h>
#include <unistd.h>
#include <sys/stat.h>
#include <dirent.h>
#include <errno.h>
#include "udev.h"
@ -41,8 +40,6 @@
#include "logging.h"
#include "namedev.h"
LIST_HEAD(file_list);
static int add_config_dev(struct config_device *new_dev)
{
@ -416,88 +413,26 @@ exit:
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);
struct stat stats;
stat(udev_rules_filename, &stats);
if ((stats.st_mode & S_IFMT) != S_IFDIR)
return namedev_parse_rules(udev_rules_filename);
else
return call_foreach_file(namedev_parse_rules,
udev_rules_filename, RULEFILE_SUFFIX);
}
int namedev_init_permissions()
{
return call_foreach_file(namedev_parse_permissions, udev_permissions_filename, PERMFILE_EXT);
struct stat stats;
stat(udev_permissions_filename, &stats);
if ((stats.st_mode & S_IFMT) != S_IFDIR)
return namedev_parse_permissions(udev_permissions_filename);
else
return call_foreach_file(namedev_parse_permissions,
udev_permissions_filename, PERMFILE_SUFFIX);
}

6
udev-add.c
View File

@ -393,6 +393,7 @@ static int rename_net_if(struct udevice *dev)
retval = ioctl(sk, SIOCSIFNAME, &ifr);
if (retval != 0)
dbg("error changing net interface name");
close(sk);
return retval;
}
@ -453,6 +454,8 @@ int udev_add_device(char *path, char *subsystem, int fake)
case 'b':
case 'c':
retval = create_node(&dev, fake);
if ((retval == 0) && (!fake))
dev_d_send(&dev, subsystem);
break;
case 'n':
@ -462,9 +465,6 @@ int udev_add_device(char *path, char *subsystem, int fake)
break;
}
if ((retval == 0) && (!fake))
dev_d_send(&dev, subsystem);
exit:
if (class_dev)
sysfs_close_class_device(class_dev);

86
udev_lib.c
View File

@ -21,14 +21,19 @@
#include <stdlib.h>
#include <stdio.h>
#include <stddef.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <dirent.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include "libsysfs/sysfs/libsysfs.h"
#include "udev.h"
#include "logging.h"
#include "udev_lib.h"
#include "list.h"
char *get_action(void)
@ -136,3 +141,84 @@ size_t buf_get_line(char *buf, size_t buflen, size_t cur)
return count - cur;
}
struct files {
struct list_head list;
char name[NAME_SIZE];
};
/* sort files in lexical order */
static int file_list_insert(char *filename, struct list_head *file_list)
{
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 */
int call_foreach_file(int fnct(char *f) , char *dirname, char *suffix)
{
struct dirent *ent;
DIR *dir;
char *ext;
char file[NAME_SIZE];
struct files *loop_file;
struct files *tmp_file;
LIST_HEAD(file_list);
dbg("open directory '%s'", dirname);
dir = opendir(dirname);
if (dir == NULL) {
dbg("unable to open '%s'", dirname);
return -1;
}
while (1) {
ent = readdir(dir);
if (ent == NULL || ent->d_name[0] == '\0')
break;
if ((ent->d_name[0] == '.') || (ent->d_name[0] == COMMENT_CHARACTER))
continue;
/* look for file with specified suffix */
ext = strrchr(ent->d_name, '.');
if (ext == NULL)
continue;
if (strcmp(ext, suffix) != 0)
continue;
dbg("put file '%s/%s' in list", dirname, ent->d_name);
file_list_insert(ent->d_name, &file_list);
}
/* call function for every file in the list */
list_for_each_entry_safe(loop_file, tmp_file, &file_list, list) {
strfieldcpy(file, dirname);
strfieldcat(file, "/");
strfieldcat(file, loop_file->name);
fnct(file);
list_del(&loop_file->list);
free(loop_file);
}
closedir(dir);
return 0;
}

1
udev_lib.h
View File

@ -75,6 +75,7 @@ extern char get_device_type(const char *path, const char *subsystem);
extern int file_map(const char *filename, char **buf, size_t *bufsize);
extern void file_unmap(char *buf, size_t bufsize);
extern size_t buf_get_line(char *buf, size_t buflen, size_t cur);
extern int call_foreach_file(int fnct(char *f) , char *filename, char *extension);
#endif

6
udevd.c
View File

@ -45,9 +45,9 @@ static int expected_seqnum = 0;
volatile static int children_waiting;
volatile static int msg_q_timeout;
LIST_HEAD(msg_list);
LIST_HEAD(exec_list);
LIST_HEAD(running_list);
static LIST_HEAD(msg_list);
static LIST_HEAD(exec_list);
static LIST_HEAD(running_list);
static void exec_queue_manager(void);
static void msg_queue_manager(void);

8
udevruler.c
View File

@ -81,8 +81,8 @@ struct device {
int added;
};
LIST_HEAD(device_list);
int device_count;
static LIST_HEAD(device_list);
static int device_count;
/* callback for database dump */
static int add_record(char *path, struct udevice *udev)
@ -149,8 +149,8 @@ struct attribute {
char key[NAME_SIZE];
};
LIST_HEAD(attribute_list);
int attribute_count;
static LIST_HEAD(attribute_list);
static int attribute_count;
static int add_attribute(const char *key, int level)
{