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add udevtrigger to request events for coldplug

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The shell script can't handle 1000's of devices.
This commit is contained in:
Kay Sievers
2006-03-17 01:52:15 +01:00
parent f660222775
commit 0d5be398ff
4 changed files with 487 additions and 0 deletions
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Makefile
+6
View File
@@ -49,6 +49,7 @@ V =
PROGRAMS = \
udev \
udevd \
udevtrigger \
udevsend \
udevcontrol \
udevmonitor \
@@ -84,6 +85,7 @@ MAN_PAGES = \
udev.7 \
udevmonitor.8 \
udevd.8 \
udevtrigger.8 \
udevsend.8 \
udevtest.8 \
udevinfo.8 \
@@ -265,6 +267,7 @@ install-man:
$(INSTALL_DATA) -D udevinfo.8 $(DESTDIR)$(mandir)/man8/udevinfo.8
$(INSTALL_DATA) -D udevtest.8 $(DESTDIR)$(mandir)/man8/udevtest.8
$(INSTALL_DATA) -D udevd.8 $(DESTDIR)$(mandir)/man8/udevd.8
$(INSTALL_DATA) -D udevtrigger.8 $(DESTDIR)$(mandir)/man8/udevtrigger.8
$(INSTALL_DATA) -D udevmonitor.8 $(DESTDIR)$(mandir)/man8/udevmonitor.8
- ln -f -s udevd.8 $(DESTDIR)$(mandir)/man8/udevcontrol.8
@extras="$(EXTRAS)"; for target in $$extras; do \
@@ -277,6 +280,7 @@ uninstall-man:
- rm -f $(DESTDIR)$(mandir)/man8/udevinfo.8
- rm -f $(DESTDIR)$(mandir)/man8/udevtest.8
- rm -f $(DESTDIR)$(mandir)/man8/udevd.8
- rm -f $(DESTDIR)$(mandir)/man8/udevtrigger.8
- rm -f $(DESTDIR)$(mandir)/man8/udevmonitor.8
- rm -f $(DESTDIR)$(mandir)/man8/udevcontrol.8
@ extras="$(EXTRAS)"; for target in $$extras; do \
@@ -287,6 +291,7 @@ uninstall-man:
install-bin:
$(INSTALL) -d $(DESTDIR)$(udevdir)
$(INSTALL_PROGRAM) -D udevd $(DESTDIR)$(sbindir)/udevd
$(INSTALL_PROGRAM) -D udevtrigger $(DESTDIR)$(sbindir)/udevtrigger
$(INSTALL_PROGRAM) -D udevcontrol $(DESTDIR)$(sbindir)/udevcontrol
$(INSTALL_PROGRAM) -D udevmonitor $(DESTDIR)$(usrsbindir)/udevmonitor
$(INSTALL_PROGRAM) -D udevinfo $(DESTDIR)$(usrbindir)/udevinfo
@@ -303,6 +308,7 @@ endif
uninstall-bin:
- rm -f $(DESTDIR)$(sbindir)/udevd
- rm -f $(DESTDIR)$(sbindir)/udevtrigger
- rm -f $(DESTDIR)$(sbindir)/udevcontrol
- rm -f $(DESTDIR)$(usrsbindir)/udevmonitor
- rm -f $(DESTDIR)$(usrbindir)/udevinfo
udevtrigger.8
+37
View File
@@ -0,0 +1,37 @@
.\" ** You probably do not want to edit this file directly **
.\" It was generated using the DocBook XSL Stylesheets (version 1.69.1).
.\" Instead of manually editing it, you probably should edit the DocBook XML
.\" source for it and then use the DocBook XSL Stylesheets to regenerate it.
.TH "UDEVTRIGGER" "8" "March 2006" "udev" "udevtrigger"
.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
.ad l
.SH "NAME"
udevtrigger \- request kernel devices events for coldplug
.SH "SYNOPSIS"
.HP 12
\fBudevtrigger\fR [\fB\-\-verbose\fR] [\fB\-\-dry\-run\fR]
.SH "DESCRIPTION"
.PP
Trigger kernel device uevents to replay missing events at system coldplug.
.SH "OPTIONS"
.TP
\fB\-\-verbose\fR
print out the devices found in sysfs.
.TP
\fB\-\-dry\-run\fR
don't actually trigger the event.
.SH "ENVIRONMENT"
.TP
\fBUDEV_LOG\fR
Overrides the syslog priority specified in the config file.
.SH "AUTHOR"
.PP
Written by Kay Sievers
<kay.sievers@vrfy.org>
and Hannes Reinecke
<hare@suse.de>.
.SH "SEE ALSO"
.PP
\fBudev\fR(8)
udevtrigger.c
+354
View File
@@ -0,0 +1,354 @@
/*
* udevtrigger.c
*
* Copyright (C) 2004-2006 Kay Sievers <kay@vrfy.org>
* Copyright (C) 2006 Hannes Reinecke <hare@suse.de>
*
* 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 <stdlib.h>
#include <stddef.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <dirent.h>
#include <fcntl.h>
#include <syslog.h>
#include <sys/stat.h>
#include <sys/types.h>
#include "udev.h"
static const char *udev_log_str;
static int verbose;
static int dry_run;
#ifdef USE_LOG
void log_message(int priority, const char *format, ...)
{
va_list args;
if (priority > udev_log_priority)
return;
va_start(args, format);
vsyslog(priority, format, args);
va_end(args);
}
#endif
/* list of devices that we should run last due to any one of a number of reasons */
static char *last_list[] = {
"/class/block/md",
"/class/block/dm-",
"/block/md",
"/block/dm-",
NULL
};
/* list of devices that we should run first due to any one of a number of reasons */
static char *first_list[] = {
"/class/mem",
"/class/tty",
NULL
};
LIST_HEAD(device_first_list);
LIST_HEAD(device_default_list);
LIST_HEAD(device_last_list);
static int device_list_insert(const char *path)
{
struct list_head *device_list = &device_default_list;
int i;
for (i = 0; first_list[i] != NULL; i++) {
if (strncmp(path, first_list[i], strlen(first_list[i])) == 0) {
device_list = &device_first_list;
break;
}
}
for (i = 0; last_list[i] != NULL; i++) {
if (strncmp(path, last_list[i], strlen(last_list[i])) == 0) {
device_list = &device_last_list;
break;
}
}
dbg("add '%s'" , path);
/* double entries will be ignored */
name_list_add(device_list, path, 0);
return 0;
}
static void trigger_uevent(const char *path)
{
char filename[PATH_SIZE];
int fd;
strlcpy(filename, path, sizeof(filename));
strlcat(filename, "/uevent", sizeof(filename));
if (verbose)
printf("%s\n", path);
if (dry_run)
return;
fd = open(filename, O_WRONLY);
if (fd < 0) {
dbg("error on opening %s: %s\n", filename, strerror(errno));
return;
}
if (write(fd, "add", 3) < 0)
info("error on triggering %s: %s\n", filename, strerror(errno));
close(fd);
}
static void exec_lists(void)
{
struct name_entry *loop_device;
struct name_entry *tmp_device;
/* handle the devices on the "first" list first */
list_for_each_entry_safe(loop_device, tmp_device, &device_first_list, node) {
trigger_uevent(loop_device->name);
list_del(&loop_device->node);
free(loop_device);
}
/* handle the devices on the "default" list next */
list_for_each_entry_safe(loop_device, tmp_device, &device_default_list, node) {
trigger_uevent(loop_device->name);
list_del(&loop_device->node);
free(loop_device);
}
/* handle devices on the "last" list, if any */
list_for_each_entry_safe(loop_device, tmp_device, &device_last_list, node) {
trigger_uevent(loop_device->name);
list_del(&loop_device->node);
free(loop_device);
}
}
static int is_device(const char *path)
{
char filename[PATH_SIZE];
struct stat statbuf;
/* look for the uevent file of the kobject */
strlcpy(filename, path, sizeof(filename));
strlcat(filename, "/uevent", sizeof(filename));
if (stat(filename, &statbuf) < 0)
return 0;
if (!(statbuf.st_mode & S_IWUSR))
return 0;
return 1;
}
static void udev_scan_bus(void)
{
char base[PATH_SIZE];
DIR *dir;
struct dirent *dent;
strlcpy(base, sysfs_path, sizeof(base));
strlcat(base, "/bus", sizeof(base));
dir = opendir(base);
if (dir != NULL) {
for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
char dirname[PATH_SIZE];
DIR *dir2;
struct dirent *dent2;
if (dent->d_name[0] == '.')
continue;
strlcpy(dirname, base, sizeof(dirname));
strlcat(dirname, "/", sizeof(dirname));
strlcat(dirname, dent->d_name, sizeof(dirname));
strlcat(dirname, "/devices", sizeof(dirname));
/* look for devices */
dir2 = opendir(dirname);
if (dir2 != NULL) {
for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) {
char dirname2[PATH_SIZE];
if (dent2->d_name[0] == '.')
continue;
strlcpy(dirname2, dirname, sizeof(dirname2));
strlcat(dirname2, "/", sizeof(dirname2));
strlcat(dirname2, dent2->d_name, sizeof(dirname2));
if (is_device(dirname2))
device_list_insert(dirname2);
}
closedir(dir2);
}
}
closedir(dir);
}
}
static void udev_scan_block(void)
{
char base[PATH_SIZE];
DIR *dir;
struct dirent *dent;
struct stat statbuf;
/* skip if "block" is already a "class" */
strlcpy(base, sysfs_path, sizeof(base));
strlcat(base, "/class/block", sizeof(base));
if (stat(base, &statbuf) == 0)
return;
strlcpy(base, sysfs_path, sizeof(base));
strlcat(base, "/block", sizeof(base));
dir = opendir(base);
if (dir != NULL) {
for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
char dirname[PATH_SIZE];
DIR *dir2;
struct dirent *dent2;
if (dent->d_name[0] == '.')
continue;
strlcpy(dirname, base, sizeof(dirname));
strlcat(dirname, "/", sizeof(dirname));
strlcat(dirname, dent->d_name, sizeof(dirname));
if (is_device(dirname))
device_list_insert(dirname);
else
continue;
/* look for partitions */
dir2 = opendir(dirname);
if (dir2 != NULL) {
for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) {
char dirname2[PATH_SIZE];
if (dent2->d_name[0] == '.')
continue;
if (!strcmp(dent2->d_name,"device"))
continue;
strlcpy(dirname2, dirname, sizeof(dirname2));
strlcat(dirname2, "/", sizeof(dirname2));
strlcat(dirname2, dent2->d_name, sizeof(dirname2));
if (is_device(dirname2))
device_list_insert(dirname2);
}
closedir(dir2);
}
}
closedir(dir);
}
}
static void udev_scan_class(void)
{
char base[PATH_SIZE];
DIR *dir;
struct dirent *dent;
strlcpy(base, sysfs_path, sizeof(base));
strlcat(base, "/class", sizeof(base));
dir = opendir(base);
if (dir != NULL) {
for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
char dirname[PATH_SIZE];
DIR *dir2;
struct dirent *dent2;
if (dent->d_name[0] == '.')
continue;
strlcpy(dirname, base, sizeof(dirname));
strlcat(dirname, "/", sizeof(dirname));
strlcat(dirname, dent->d_name, sizeof(dirname));
dir2 = opendir(dirname);
if (dir2 != NULL) {
for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) {
char dirname2[PATH_SIZE];
if (dent2->d_name[0] == '.')
continue;
if (!strcmp(dent2->d_name, "device"))
continue;
strlcpy(dirname2, dirname, sizeof(dirname2));
strlcat(dirname2, "/", sizeof(dirname2));
strlcat(dirname2, dent2->d_name, sizeof(dirname2));
if (is_device(dirname2))
device_list_insert(dirname2);
}
closedir(dir2);
}
}
closedir(dir);
}
}
int main(int argc, char *argv[], char *envp[])
{
int i;
logging_init("udevtrigger");
udev_config_init();
dbg("version %s", UDEV_VERSION);
udev_log_str = getenv("UDEV_LOG");
for (i = 1 ; i < argc; i++) {
char *arg = argv[i];
if (strcmp(arg, "--verbose") == 0 || strcmp(arg, "-v") == 0)
verbose = 1;
else if (strcmp(arg, "--dry-run") == 0 || strcmp(arg, "-n") == 0)
dry_run = 1;
else {
fprintf(stderr, "Usage: udevtrigger [--verbose] [--dry-run]\n");
goto exit;
}
}
sysfs_init();
udev_scan_bus();
udev_scan_class();
udev_scan_block();
exec_lists();
sysfs_cleanup();
exit:
logging_close();
return 0;
}
udevtrigger.xml
+90
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@@ -0,0 +1,90 @@
<?xml version='1.0'?>
<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
<article>
<articleinfo>
<title>xmlto</title>
<author>
<firstname>Kay</firstname>
<surname>Sievers</surname>
<email>kay.sievers@vrfy.org</email>
</author>
<copyright>
<year>2006</year>
<holder>Kay Sievers</holder>
</copyright>
</articleinfo>
<section>
<title>udevtrigger</title>
<refentry>
<refentryinfo>
<title>udevtrigger</title>
<date>March 2006</date>
<productname>udev</productname>
</refentryinfo>
<refmeta>
<refentrytitle>udevtrigger</refentrytitle>
<manvolnum>8</manvolnum>
</refmeta>
<refnamediv>
<refname>udevtrigger</refname><refpurpose>request kernel devices events for coldplug</refpurpose>
</refnamediv>
<refsynopsisdiv>
<cmdsynopsis>
<command>udevtrigger</command>
<arg><option>--verbose</option></arg>
<arg><option>--dry-run</option></arg>
</cmdsynopsis>
</refsynopsisdiv>
<refsect1><title>DESCRIPTION</title>
<para>Trigger kernel device uevents to replay missing events at system coldplug.</para>
</refsect1>
<refsect1><title>OPTIONS</title>
<variablelist>
<varlistentry>
<term><option>--verbose</option></term>
<listitem>
<para>print out the devices found in sysfs.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--dry-run</option></term>
<listitem>
<para>don't actually trigger the event.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1><title>ENVIRONMENT</title>
<variablelist>
<varlistentry>
<term><option>UDEV_LOG</option></term>
<listitem>
<para>Overrides the syslog priority specified in the config file.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1><title>AUTHOR</title>
<para>Written by Kay Sievers <email>kay.sievers@vrfy.org</email> and
Hannes Reinecke <email>hare@suse.de</email>.</para>
</refsect1>
<refsect1>
<title>SEE ALSO</title>
<para><citerefentry>
<refentrytitle>udev</refentrytitle><manvolnum>8</manvolnum>
</citerefentry></para>
</refsect1>
</refentry>
</section>
</article>