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freebsd-skq/usr.sbin/usbd/usbd.c
julian 5c845ebb4d Allow usbd to handle event notificatiosn where mor ethan one 
device is involved, (e.g. plugin a hub with multiple devices
already attached to it)

Submitted by: Naoyuki Tai <ntai@smartfruit.com>
PR: 43993
MFC in:	1 week
2005-01-04 06:45:41 +00:00

1138 lines
30 KiB
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/* $NetBSD: usbd.c,v 1.4 1998/12/09 00:57:19 augustss Exp $ */
/* $FreeBSD$ */
/*
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Lennart Augustsson (augustss@netbsd.org).
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/* USBD creates 'threads' in the kernel, used for doing discovery when a
* device has attached or detached. This functionality should be removed
* once kernel threads have been added to the kernel.
* It also handles the event queue, and executing commands based on those
* events.
*
* See usbd(8).
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <ctype.h>
#include <signal.h>
#include <paths.h>
#include <stdint.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/linker.h>
#include <sys/module.h>
#include <sys/queue.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <regex.h>
#include <dev/usb/usb.h>
/* default name of configuration file
*/
#define CONFIGFILE "/etc/usbd.conf"
/* the name of the device spitting out usb attach/detach events as well as
* the prefix for the individual busses (used as a semi kernel thread).
*/
#define USBDEV "/dev/usb"
/* Maximum number of USB busses expected to be in a system
* XXX should be replaced by dynamic allocation.
*/
#define MAXUSBDEV 4
/* Sometimes a device does not respond in time for interrupt
* driven explore to find it. Therefore we run an exploration
* at regular intervals to catch those.
*/
#define TIMEOUT 30
/* The wildcard used in actions for strings and integers
*/
#define WILDCARD_STRING NULL
#define WILDCARD_INT -1
extern char *__progname; /* name of program */
char *configfile = CONFIGFILE; /* name of configuration file */
char *devs[MAXUSBDEV]; /* device names */
int fds[MAXUSBDEV]; /* file descriptors for USBDEV\d+ */
int ndevs = 0; /* number of entries in fds / devs */
int fd = -1; /* file descriptor for USBDEV */
int lineno;
int verbose = 0; /* print message on what it is doing */
typedef struct event_name_s {
int type; /* event number (from usb.h) */
char *name;
} event_name_t;
event_name_t event_names[] = {
{USB_EVENT_CTRLR_ATTACH, "ctrlr-attach"},
{USB_EVENT_CTRLR_DETACH, "ctrlr-detach"},
{USB_EVENT_DRIVER_ATTACH, "driver-attach"},
{USB_EVENT_DRIVER_DETACH, "driver-detach"},
{USB_EVENT_DEVICE_ATTACH, "device-attach"},
{USB_EVENT_DEVICE_DETACH, "device-detach"},
{0, NULL} /* NULL indicates end of list, not 0 */
};
#define DEVICE_FIELD 0 /* descriptive field */
#define VENDOR_FIELD 1 /* selective fields */
#define PRODUCT_FIELD 2
#define RELEASE_FIELD 3
#define CLASS_FIELD 4
#define SUBCLASS_FIELD 5
#define PROTOCOL_FIELD 6
#define DEVNAME_FIELD 7
#define ATTACH_FIELD 8 /* command fields */
#define DETACH_FIELD 9
typedef struct action_s {
char *name; /* descriptive string */
int vendor; /* selection criteria */
int product;
int release;
int class;
int subclass;
int protocol;
char *devname;
regex_t devname_regex;
char *attach; /* commands to execute */
char *detach;
STAILQ_ENTRY(action_s) next;
} action_t;
STAILQ_HEAD(action_list, action_s) actions = STAILQ_HEAD_INITIALIZER(actions);
typedef struct action_match_s {
action_t *action;
char *devname;
} action_match_t;
/* the function returns 0 for failure, 1 for all arguments found and 2 for
* arguments left over in trail.
*/
typedef int (*config_field_fn) __P((action_t *action, char *args,
char **trail));
int set_device_field(action_t *action, char *args, char **trail);
int set_vendor_field(action_t *action, char *args, char **trail);
int set_product_field(action_t *action, char *args, char **trail);
int set_release_field(action_t *action, char *args, char **trail);
int set_class_field(action_t *action, char *args, char **trail);
int set_subclass_field(action_t *action, char *args, char **trail);
int set_protocol_field(action_t *action, char *args, char **trail);
int set_devname_field(action_t *action, char *args, char **trail);
int set_attach_field(action_t *action, char *args, char **trail);
int set_detach_field(action_t *action, char *args, char **trail);
/* the list of fields supported in an entry */
typedef struct config_field_s {
int event;
char *name;
config_field_fn function;
} config_field_t;
config_field_t config_fields[] = {
{DEVICE_FIELD, "device", set_device_field},
{VENDOR_FIELD, "vendor", set_vendor_field},
{PRODUCT_FIELD, "product", set_product_field},
{RELEASE_FIELD, "release", set_release_field},
{CLASS_FIELD, "class", set_class_field},
{SUBCLASS_FIELD, "subclass", set_subclass_field},
{PROTOCOL_FIELD, "protocol", set_protocol_field},
{DEVNAME_FIELD, "devname", set_devname_field},
{ATTACH_FIELD, "attach", set_attach_field},
{DETACH_FIELD, "detach", set_detach_field},
{0, NULL, NULL} /* NULL is EOL marker, not the 0 */
};
/* prototypes for some functions */
void print_event __P((struct usb_event *event));
void print_action __P((action_t *action, int i));
void print_actions __P((void));
int find_action __P((struct usb_device_info *devinfo,
action_match_t *action_match));
void
usage(void)
{
fprintf(stderr, "usage: %s [-d] [-v] [-t timeout] [-e] [-f dev]\n"
" [-n] [-c config]\n",
__progname);
exit(1);
}
/* generic helper functions for the functions to set the fields of actions */
int
get_string(char *src, char **rdst, char **rsrc)
{
/* Takes the first string from src, taking quoting into account.
* rsrc (if not NULL) is set to the first byte not included in the
* string returned in rdst.
*
* Input is:
* src = 'fir"st \'par"t second part';
* Returned is:
* *dst = 'hello \'world';
* if (rsrc != NULL)
* *rsrc = 'second part';
*
* Notice the fact that the single quote enclosed in double quotes is
* returned. Also notice that before second part there is more than
* one space, which is removed in rsrc.
*
* The string in src is not modified.
*/
char *dst; /* destination string */
int i; /* index into src */
int j; /* index into dst */
int quoted = 0; /* 1 for single, 2 for double quoted */
dst = malloc(strlen(src)+1); /* XXX allocation is too big, realloc?*/
if (dst == NULL) { /* should not happen, really */
fprintf(stderr, "%s:%d: Out of memory\n", configfile, lineno);
exit(2);
}
/* find the end of the current string. If quotes are found the search
* continues until the corresponding quote is found.
* So,
* hel'lo" "wor'ld
* represents the string
* hello" "world
* and not (hello world).
*/
for (i = 0, j = 0; i < strlen(src); i++) {
if (src[i] == '\'' && (quoted == 0 || quoted == 1)) {
quoted = (quoted? 0:1);
} else if (src[i] == '"' && (quoted == 0 || quoted == 2)) {
quoted = (quoted? 0:2);
} else if (isspace(src[i]) && !quoted) {
/* found a space outside quotes -> terminates src */
break;
} else {
dst[j++] = src[i]; /* copy character */
}
}
/* quotes being left open? */
if (quoted) {
fprintf(stderr, "%s:%d: Missing %s quote at end of '%s'\n",
configfile, lineno,
(quoted == 1? "single":"double"), src);
exit(2);
}
/* skip whitespace for second part */
for (/*i is set*/; i < strlen(src) && isspace(src[i]); i++)
; /* nop */
dst[j] = '\0'; /* make sure it's NULL terminated */
*rdst = dst; /* and return the pointers */
if (rsrc != NULL) /* if info wanted */
*rsrc = &src[i];
if (*dst == '\0') { /* empty string */
return 0;
} else if (src[i] == '\0') { /* completely used (1 argument) */
return 1;
} else { /* 2 or more args, *rsrc is rest */
return 2;
}
}
int
get_integer(char *src, int *dst, char **rsrc)
{
char *endptr;
/* Converts str to a number. If one argument was found in
* str, 1 is returned and *dst is set to the value of the integer.
* If 2 or more arguments were presented, 2 is returned,
* *dst is set to the converted value and rsrc, if not null, points
* at the start of the next argument (whitespace skipped).
* Else 0 is returned and nothing else is valid.
*/
if (src == NULL || *src == '\0') /* empty src */
return(0);
*dst = (int) strtol(src, &endptr, 0);
/* skip over whitespace of second argument */
while (isspace(*endptr))
endptr++;
if (rsrc)
*rsrc = endptr;
if (isspace(*endptr)) { /* partial match, 2 or more arguments */
return(2);
} else if (*endptr == '\0') { /* full match, 1 argument */
return(1);
} else { /* invalid src, no match */
return(0);
}
}
/* functions to set the fields of the actions appropriately */
int
set_device_field(action_t *action, char *args, char **trail)
{
return(get_string(args, &action->name, trail));
}
int
set_vendor_field(action_t *action, char *args, char **trail)
{
return(get_integer(args, &action->vendor, trail));
}
int
set_product_field(action_t *action, char *args, char **trail)
{
return(get_integer(args, &action->product, trail));
}
int
set_release_field(action_t *action, char *args, char **trail)
{
return(get_integer(args, &action->release, trail));
}
int
set_class_field(action_t *action, char *args, char **trail)
{
return(get_integer(args, &action->class, trail));
}
int
set_subclass_field(action_t *action, char *args, char **trail)
{
return(get_integer(args, &action->subclass, trail));
}
int
set_protocol_field(action_t *action, char *args, char **trail)
{
return(get_integer(args, &action->protocol, trail));
}
int
set_devname_field(action_t *action, char *args, char **trail)
{
int match = get_string(args, &action->devname, trail);
int len;
int error;
char *string;
# define ERRSTR_SIZE 100
char errstr[ERRSTR_SIZE];
if (match == 0)
return(0);
len = strlen(action->devname);
string = malloc(len + 15);
if (string == NULL)
return(0);
bcopy(action->devname, string+7, len); /* make some space for */
bcopy("[[:<:]]", string, 7); /* beginning of word */
bcopy("[[:>:]]", string+7+len, 7); /* and end of word */
string[len + 14] = '\0';
error = regcomp(&action->devname_regex, string, REG_NOSUB|REG_EXTENDED);
if (error) {
errstr[0] = '\0';
regerror(error, &action->devname_regex, errstr, ERRSTR_SIZE);
fprintf(stderr, "%s:%d: %s\n", configfile, lineno, errstr);
return(0);
}
return(match);
}
int
set_attach_field(action_t *action, char *args, char **trail)
{
return(get_string(args, &action->attach, trail));
}
int
set_detach_field(action_t *action, char *args, char **trail)
{
return(get_string(args, &action->detach, trail));
}
void
read_configuration(void)
{
FILE *file; /* file descriptor */
char *line; /* current line */
char *linez; /* current line, NULL terminated */
char *field; /* first part, the field name */
char *args; /* second part, arguments */
char *trail; /* remaining part after parsing, should be '' */
size_t len; /* length of current line */
int i,j; /* loop counters */
action_t *action = NULL; /* current action */
file = fopen(configfile, "r");
if (file == NULL) {
fprintf(stderr, "%s: Could not open for reading, %s\n",
configfile, strerror(errno));
exit(2);
}
for (lineno = 1; /* nop */;lineno++) {
line = fgetln(file, &len);
if (line == NULL) {
if (feof(file)) /* EOF */
break;
if (ferror(file)) {
fprintf(stderr, "%s:%d: Could not read, %s\n",
configfile, lineno, strerror(errno));
exit(2);
}
}
/* skip initial spaces */
while (len > 0 && isspace(*line)) {
line++;
len--;
}
if (len == 0) /* empty line */
continue;
if (line[0] == '#') /* comment line */
continue;
/* make a NULL terminated copy of the string */
linez = malloc(len+1);
if (linez == NULL) {
fprintf(stderr, "%s:%d: Out of memory\n",
configfile, lineno);
exit(2);
}
strncpy(linez, line, len);
linez[len] = '\0';
/* find the end of the current word (is field), that's the
* start of the arguments
*/
field = linez;
args = linez;
while (*args != '\0' && !isspace(*args))
args++;
/* If arguments is not the empty string, NULL terminate the
* field and move the argument pointer to the first character
* of the arguments.
* If arguments is the empty string field and arguments both
* are terminated (strlen(field) >= 0, strlen(arguments) == 0).
*/
if (*args != '\0') {
*args = '\0';
args++;
}
/* Skip initial spaces */
while (*args != '\0' && isspace(*args))
args++;
/* Cut off trailing whitespace */
for (i = 0, j = 0; args[i] != '\0'; i++)
if (!isspace(args[i]))
j = i+1;
args[j] = '\0';
/* We now have the field and the argument separated into
* two strings that are NULL terminated
*/
/* If the field is 'device' we have to start a new action. */
if (strcmp(field, "device") == 0) {
/* Allocate a new action and set defaults */
action = malloc(sizeof(*action));
if (action == NULL) {
fprintf(stderr, "%s:%d: Out of memory\n",
configfile, lineno);
exit(2);
}
memset(action, 0, sizeof(*action));
action->product = WILDCARD_INT;
action->vendor = WILDCARD_INT;
action->release = WILDCARD_INT;
action->class = WILDCARD_INT;
action->subclass = WILDCARD_INT;
action->protocol = WILDCARD_INT;
action->devname = WILDCARD_STRING;
/* Add it to the end of the list to preserve order */
STAILQ_INSERT_TAIL(&actions, action, next);
}
if (action == NULL) {
line[len] = '\0'; /* XXX zero terminate */
fprintf(stderr, "%s:%d: Doesn't start with 'device' "
"but '%s'\n", configfile, lineno, field);
exit(2);
}
for (i = 0; config_fields[i].name ; i++) {
/* does the field name match? */
if (strcmp(config_fields[i].name, field) == 0) {
/* execute corresponding set-field function */
if ((config_fields[i].function)(action, args,
&trail)
!= 1) {
fprintf(stderr,"%s:%d: "
"Syntax error in '%s'\n",
configfile, lineno, linez);
exit(2);
}
break;
}
}
if (config_fields[i].name == NULL) { /* Reached end of list*/
fprintf(stderr, "%s:%d: Unknown field '%s'\n",
configfile, lineno, field);
exit(2);
}
}
fclose(file);
if (verbose >= 2)
print_actions();
}
void
print_event(struct usb_event *event)
{
int i;
struct timespec *timespec = &event->ue_time;
struct usb_device_info *devinfo = &event->u.ue_device;
printf("%s: ", __progname);
for (i = 0; event_names[i].name != NULL; i++) {
if (event->ue_type == event_names[i].type) {
printf("%s event", event_names[i].name);
break;
}
}
if (event_names[i].name == NULL)
printf("unknown event %d", event->ue_type);
if (event->ue_type == USB_EVENT_DEVICE_ATTACH ||
event->ue_type == USB_EVENT_DEVICE_DETACH) {
devinfo = &event->u.ue_device;
printf(" at %jd.%09ld, %s, %s:\n",
(intmax_t)timespec->tv_sec, timespec->tv_nsec,
devinfo->udi_product, devinfo->udi_vendor);
printf(" vndr=0x%04x prdct=0x%04x rlse=0x%04x "
"clss=0x%04x subclss=0x%04x prtcl=0x%04x\n",
devinfo->udi_vendorNo, devinfo->udi_productNo,
devinfo->udi_releaseNo,
devinfo->udi_class, devinfo->udi_subclass, devinfo->udi_protocol);
if (devinfo->udi_devnames[0][0] != '\0') {
char c = ' ';
printf(" device names:");
for (i = 0; i < USB_MAX_DEVNAMES; i++) {
if (devinfo->udi_devnames[i][0] == '\0')
break;
printf("%c%s", c, devinfo->udi_devnames[i]);
c = ',';
}
}
} else if (event->ue_type == USB_EVENT_CTRLR_ATTACH ||
event->ue_type == USB_EVENT_CTRLR_DETACH) {
printf(" bus=%d", event->u.ue_ctrlr.ue_bus);
} else if (event->ue_type == USB_EVENT_DRIVER_ATTACH ||
event->ue_type == USB_EVENT_DRIVER_DETACH) {
printf(" cookie=%u devname=%s",
event->u.ue_driver.ue_cookie.cookie,
event->u.ue_driver.ue_devname);
}
printf("\n");
}
void
print_action(action_t *action, int i)
{
if (action == NULL)
return;
printf("%s: action %d: %s\n",
__progname, i,
(action->name? action->name:""));
if (action->product != WILDCARD_INT ||
action->vendor != WILDCARD_INT ||
action->release != WILDCARD_INT ||
action->class != WILDCARD_INT ||
action->subclass != WILDCARD_INT ||
action->protocol != WILDCARD_INT)
printf(" ");
if (action->vendor != WILDCARD_INT)
printf(" vndr=0x%04x", action->vendor);
if (action->product != WILDCARD_INT)
printf(" prdct=0x%04x", action->product);
if (action->release != WILDCARD_INT)
printf(" rlse=0x%04x", action->release);
if (action->class != WILDCARD_INT)
printf(" clss=0x%04x", action->class);
if (action->subclass != WILDCARD_INT)
printf(" subclss=0x%04x", action->subclass);
if (action->protocol != WILDCARD_INT)
printf(" prtcl=0x%04x", action->protocol);
if (action->vendor != WILDCARD_INT ||
action->product != WILDCARD_INT ||
action->release != WILDCARD_INT ||
action->class != WILDCARD_INT ||
action->subclass != WILDCARD_INT ||
action->protocol != WILDCARD_INT)
printf("\n");
if (action->devname != WILDCARD_STRING)
printf(" devname: %s\n", action->devname);
if (action->attach != NULL)
printf(" attach='%s'\n",
action->attach);
if (action->detach != NULL)
printf(" detach='%s'\n",
action->detach);
}
void
print_actions()
{
int i = 0;
action_t *action;
STAILQ_FOREACH(action, &actions, next)
print_action(action, ++i);
printf("%s: %d action%s\n", __progname, i, (i == 1? "":"s"));
}
int
match_devname(action_t *action, struct usb_device_info *devinfo)
{
int i;
regmatch_t match;
int error;
for (i = 0; i < USB_MAX_DEVNAMES; i++) {
if (devinfo->udi_devnames[i][0] == '\0')
break;
error = regexec(&action->devname_regex, devinfo->udi_devnames[i],
1, &match, 0);
if (error == 0) {
if (verbose >= 2)
printf("%s: %s matches %s\n", __progname,
devinfo->udi_devnames[i], action->devname);
return(i);
}
}
return(-1);
}
int
find_action(struct usb_device_info *devinfo, action_match_t *action_match)
{
action_t *action;
char *devname = NULL;
int match = -1;
STAILQ_FOREACH(action, &actions, next) {
if ((action->vendor == WILDCARD_INT ||
action->vendor == devinfo->udi_vendorNo) &&
(action->product == WILDCARD_INT ||
action->product == devinfo->udi_productNo) &&
(action->release == WILDCARD_INT ||
action->release == devinfo->udi_releaseNo) &&
(action->class == WILDCARD_INT ||
action->class == devinfo->udi_class) &&
(action->subclass == WILDCARD_INT ||
action->subclass == devinfo->udi_subclass) &&
(action->protocol == WILDCARD_INT ||
action->protocol == devinfo->udi_protocol) &&
(action->devname == WILDCARD_STRING ||
(match = match_devname(action, devinfo)) != -1)) {
/* found match !*/
/* Find a devname for pretty printing. Either
* the matched one or otherwise, if there is only
* one devname for that device, use that.
*/
if (match >= 0)
devname = devinfo->udi_devnames[match];
else if (devinfo->udi_devnames[0][0] != '\0' &&
devinfo->udi_devnames[1][0] == '\0')
/* if we have exactly 1 device name */
devname = devinfo->udi_devnames[0];
if (verbose) {
printf("%s: Found action '%s' for %s, %s",
__progname, action->name,
devinfo->udi_product, devinfo->udi_vendor);
if (devname)
printf(" at %s", devname);
printf("\n");
}
action_match->action = action;
action_match->devname = devname;
return(1);
}
}
return(0);
}
void
execute_command(char *cmd)
{
pid_t pid;
struct sigaction ign, intact, quitact;
sigset_t newsigblock, oldsigblock;
int status;
int i;
if (verbose)
printf("%s: Executing '%s'\n", __progname, cmd);
if (cmd == NULL)
return;
/* The code below is directly taken from the system(3) call.
* Added to it is the closing of open file descriptors.
*/
/*
* Ignore SIGINT and SIGQUIT, block SIGCHLD. Remember to save
* existing signal dispositions.
*/
ign.sa_handler = SIG_IGN;
(void) sigemptyset(&ign.sa_mask);
ign.sa_flags = 0;
(void) sigaction(SIGINT, &ign, &intact);
(void) sigaction(SIGQUIT, &ign, &quitact);
(void) sigemptyset(&newsigblock);
(void) sigaddset(&newsigblock, SIGCHLD);
(void) sigprocmask(SIG_BLOCK, &newsigblock, &oldsigblock);
pid = fork();
if (pid == -1) {
fprintf(stderr, "%s: fork failed, %s\n",
__progname, strerror(errno));
} else if (pid == 0) {
/* child here */
/* close all open file handles for USBDEV\d* devices */
for (i = 0; i < ndevs; i++)
close(fds[i]); /* USBDEV\d+ */
close(fd); /* USBDEV */
/* Restore original signal dispositions and exec the command. */
(void) sigaction(SIGINT, &intact, NULL);
(void) sigaction(SIGQUIT, &quitact, NULL);
(void) sigprocmask(SIG_SETMASK, &oldsigblock, NULL);
execl(_PATH_BSHELL, "sh", "-c", cmd, (char *)NULL);
/* should only be reached in case of error */
exit(127);
} else {
/* parent here */
do {
pid = waitpid(pid, &status, 0);
} while (pid == -1 && errno == EINTR);
}
(void) sigaction(SIGINT, &intact, NULL);
(void) sigaction(SIGQUIT, &quitact, NULL);
(void) sigprocmask(SIG_SETMASK, &oldsigblock, NULL);
if (pid == -1) {
fprintf(stderr, "%s: waitpid returned: %s\n",
__progname, strerror(errno));
} else if (pid == 0) {
fprintf(stderr, "%s: waitpid returned 0 ?!\n",
__progname);
} else {
if (status == -1) {
fprintf(stderr, "%s: Could not start '%s'\n",
__progname, cmd);
} else if (status == 127) {
fprintf(stderr, "%s: Shell failed for '%s'\n",
__progname, cmd);
} else if (WIFEXITED(status) && WEXITSTATUS(status)) {
fprintf(stderr, "%s: '%s' returned %d\n",
__progname, cmd, WEXITSTATUS(status));
} else if (WIFSIGNALED(status)) {
fprintf(stderr, "%s: '%s' caught signal %d\n",
__progname, cmd, WTERMSIG(status));
} else if (verbose >= 2) {
printf("%s: '%s' is ok\n", __progname, cmd);
}
}
}
void
process_event_queue(int fd)
{
struct usb_event events;
int error;
int len;
action_match_t action_match;
int i;
struct usb_event the_event;
struct usb_device_info* devinfo;
struct usb_device_info* the_devinfo;
for (;;) {
len = read(fd, &events, sizeof(events));
if (len == -1) {
if (errno == EWOULDBLOCK) {
/* no more events */
break;
} else {
fprintf(stderr,"%s: Could not read event, %s\n",
__progname, strerror(errno));
exit(1);
}
}
if (len == 0)
break;
if (len != sizeof(events)) {
fprintf(stderr, "partial read on %s\n", USBDEV);
exit(1);
}
/* we seem to have gotten a valid event */
if (verbose)
print_event(&events);
devinfo = &events.u.ue_device;
for (i = 0; i < USB_MAX_DEVNAMES; i++) {
if (devinfo->udi_devnames[i][0] == '\0')
break;
memcpy(&the_event, &events, sizeof(the_event));
the_devinfo = &the_event.u.ue_device;
if (i > 0)
memcpy(the_devinfo->udi_devnames[0], the_devinfo->udi_devnames[i], USB_MAX_DEVNAMELEN);
the_devinfo->udi_devnames[1][0] = '\0';
if (verbose >=2) {
printf(" === match attempt: %s\n", the_devinfo->udi_devnames[0]);
}
/* handle the event appropriately */
switch (the_event.ue_type) {
case USB_EVENT_CTRLR_ATTACH:
if (verbose)
printf("USB_EVENT_CTRLR_ATTACH\n");
break;
case USB_EVENT_CTRLR_DETACH:
if (verbose)
printf("USB_EVENT_CTRLR_DETACH\n");
break;
case USB_EVENT_DEVICE_ATTACH:
case USB_EVENT_DEVICE_DETACH:
if (find_action(&the_event.u.ue_device, &action_match) == 0)
/* nothing found */
break;
if (verbose >= 2)
print_action(action_match.action, 0);
if (action_match.devname) {
if (verbose >= 2)
printf("%s: Setting DEVNAME='%s'\n",
__progname, action_match.devname);
error = setenv("DEVNAME", action_match.devname, 1);
if (error)
fprintf(stderr, "%s: setenv(\"DEVNAME\", \"%s\",1) failed, %s\n",
__progname, action_match.devname, strerror(errno));
}
if (USB_EVENT_IS_ATTACH(the_event.ue_type) &&
action_match.action->attach)
execute_command(action_match.action->attach);
if (USB_EVENT_IS_DETACH(the_event.ue_type) &&
action_match.action->detach)
execute_command(action_match.action->detach);
break;
case USB_EVENT_DRIVER_ATTACH:
if (verbose)
printf("USB_EVENT_DRIVER_ATTACH\n");
break;
case USB_EVENT_DRIVER_DETACH:
if (verbose)
printf("USB_EVENT_DRIVER_DETACH\n");
break;
default:
printf("Unknown USB event %d\n", the_event.ue_type);
}
}
}
}
int
main(int argc, char **argv)
{
int error, i;
int ch; /* getopt option */
int debug = 0; /* print debugging output */
int explore_once = 0; /* don't do only explore */
int handle_events = 1; /* do handle the event queue */
int maxfd; /* maximum fd in use */
char buf[50]; /* for creation of the filename */
fd_set r,w;
int itimeout = TIMEOUT; /* timeout for select */
struct timeval tv;
if (modfind(USB_UHUB) < 0) {
if (kldload(USB_KLD) < 0 || modfind(USB_UHUB) < 0) {
perror(USB_KLD ": Kernel module not available");
return 1;
}
}
while ((ch = getopt(argc, argv, "c:def:nt:v")) != -1) {
switch(ch) {
case 'c':
configfile = strdup(optarg);
if (configfile == NULL) {
fprintf(stderr, "strdup returned NULL\n");
return 1;
}
break;
case 'd':
debug++;
break;
case 'e':
explore_once = 1;
break;
case 'f':
if (ndevs < MAXUSBDEV)
devs[ndevs++] = optarg;
break;
case 'n':
handle_events = 0;
break;
case 't':
itimeout = atoi(optarg);
break;
case 'v':
verbose++;
break;
case '?':
default:
usage();
}
}
argc -= optind;
argv += optind;
maxfd = 0;
if (ndevs == 0) {
/* open all the USBDEVS\d+ devices */
for (i = 0; i < MAXUSBDEV; i++) {
sprintf(buf, "%s%d", USBDEV, i);
fds[ndevs] = open(buf, O_RDWR);
if (fds[ndevs] >= 0) {
devs[ndevs] = strdup(buf);
if (devs[ndevs] == NULL) {
fprintf(stderr, "strdup returned NULL\n");
return 1;
}
if (verbose)
printf("%s: opened %s\n",
__progname, devs[ndevs]);
if (fds[ndevs] > maxfd)
maxfd = fds[ndevs];
ndevs++;
} else if (errno != ENXIO && errno != ENOENT) {
/* there was an error, on a device that does
* exist (device is configured)
*/
fprintf(stderr, "%s: Could not open %s, %s\n",
__progname, buf, strerror(errno));
exit(1);
}
}
} else {
/* open all the files specified with -f */
for (i = 0; i < ndevs; i++) {
fds[i] = open(devs[i], O_RDWR);
if (fds[i] < 0) {
fprintf(stderr, "%s: Could not open %s, %s\n",
__progname, devs[i], strerror(errno));
exit(1);
} else {
if (verbose)
printf("%s: opened %s\n",
__progname, devs[i]);
if (fds[i] > maxfd)
maxfd = fds[i];
}
}
}
if (ndevs == 0) {
fprintf(stderr, "No USB host controllers found\n");
exit(1);
}
/* Do the explore once and exit */
if (explore_once) {
for (i = 0; i < ndevs; i++) {
error = ioctl(fds[i], USB_DISCOVER);
if (error < 0) {
fprintf(stderr, "%s: ioctl(%s, USB_DISCOVER) "
"failed, %s\n",
__progname, devs[i], strerror(errno));
exit(1);
}
}
exit(0);
}
if (handle_events) {
if (verbose)
printf("%s: reading configuration file %s\n",
__progname, configfile);
read_configuration();
fd = open(USBDEV, O_RDONLY | O_NONBLOCK);
if (fd < 0) {
fprintf(stderr, "%s: Could not open %s, %s\n",
__progname, USBDEV, strerror(errno));
exit(1);
}
if (verbose)
printf("%s: opened %s\n", __progname, USBDEV);
if (fd > maxfd)
maxfd = fd;
process_event_queue(fd); /* dequeue the initial events */
}
/* move to the background */
if (!debug)
daemon(0, 0);
/* start select on all the open file descriptors */
for (;;) {
FD_ZERO(&r);
FD_ZERO(&w);
if (handle_events)
FD_SET(fd, &r); /* device USBDEV */
for (i = 0; i < ndevs; i++)
FD_SET(fds[i], &w); /* device USBDEV\d+ */
tv.tv_usec = 0;
tv.tv_sec = itimeout;
error = select(maxfd+1, &r, &w, 0, itimeout ? &tv : 0);
if (error < 0) {
fprintf(stderr, "%s: Select failed, %s\n",
__progname, strerror(errno));
exit(1);
}
/* USBDEV\d+ devices have signaled change, do a usb_discover */
for (i = 0; i < ndevs; i++) {
if (error == 0 || FD_ISSET(fds[i], &w)) {
if (verbose >= 2)
printf("%s: doing %sdiscovery on %s\n",
__progname,
(error? "":"timeout "), devs[i]);
if (ioctl(fds[i], USB_DISCOVER) < 0) {
fprintf(stderr, "%s: ioctl(%s, "
"USB_DISCOVER) failed, %s\n",
__progname, devs[i],
strerror(errno));
exit(1);
}
}
}
/* check the event queue */
if (handle_events && (FD_ISSET(fd, &r) || error == 0)) {
if (verbose >= 2)
printf("%s: processing event queue %son %s\n",
__progname,
(error? "":"due to timeout "), USBDEV);
process_event_queue(fd);
}
}
}
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