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NetBSD/usr.bin/usbhidctl/usbhid.c

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/* $NetBSD: usbhid.c,v 1.35 2009/04/14 06:14:10 lukem Exp $ */
/*
* Copyright (c) 2001 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by David Sainty <David.Sainty@dtsp.co.nz>
*
* 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.
*
* 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.
*/
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: usbhid.c,v 1.35 2009/04/14 06:14:10 lukem Exp $");
#endif
#include <sys/types.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbhid.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <usbhid.h>
/*
* Zero if not in a verbose mode. Greater levels of verbosity
* are indicated by values larger than one.
*/
unsigned int verbose;
/* Parser tokens */
#define DELIM_USAGE '.'
#define DELIM_PAGE ':'
#define DELIM_SET '='
#define DELIM_INSTANCE '#'
static int reportid;
struct Susbvar {
/* Variable name, not NUL terminated */
char const *variable;
size_t varlen;
char const *value; /* Value to set variable to */
#define MATCH_ALL (1 << 0)
#define MATCH_COLLECTIONS (1 << 1)
#define MATCH_NODATA (1 << 2)
#define MATCH_CONSTANTS (1 << 3)
#define MATCH_WASMATCHED (1 << 4)
#define MATCH_SHOWPAGENAME (1 << 5)
#define MATCH_SHOWNUMERIC (1 << 6)
#define MATCH_WRITABLE (1 << 7)
#define MATCH_SHOWVALUES (1 << 8)
unsigned int mflags;
/*
* An instance number can be used to identify an item by
* position as well as by name. This allows us to manipulate
* devices that don't assign unique names to all usage items.
*/
int usageinstance;
/* Workspace for hidmatch() */
ssize_t matchindex;
int matchcount;
int (*opfunc)(struct hid_item *item, struct Susbvar *var,
u_int32_t const *collist, size_t collen, u_char *buf);
};
struct Sreport {
struct usb_ctl_report *buffer;
enum {srs_uninit, srs_clean, srs_dirty} status;
int use_getreport; /* Non-zero if we expect USB_GET_REPORT to work */
int report_id;
size_t size;
};
static struct {
int uhid_report;
hid_kind_t hid_kind;
char const *name;
} const reptoparam[] = {
#define REPORT_INPUT 0
{ UHID_INPUT_REPORT, hid_input, "input" },
#define REPORT_OUTPUT 1
{ UHID_OUTPUT_REPORT, hid_output, "output" },
#define REPORT_FEATURE 2
{ UHID_FEATURE_REPORT, hid_feature, "feature" }
#define REPORT_MAXVAL 2
};
/*
* Extract 16-bit unsigned usage ID from a numeric string. Returns -1
* if string failed to parse correctly.
*/
static int
strtousage(const char *nptr, size_t nlen)
{
char *endptr;
long result;
char numstr[16];
if (nlen >= sizeof(numstr) || !isdigit((unsigned char)*nptr))
return -1;
/*
* We use strtol() here, but unfortunately strtol() requires a
* NUL terminated string - which we don't have - at least not
* officially.
*/
memcpy(numstr, nptr, nlen);
numstr[nlen] = '\0';
result = strtol(numstr, &endptr, 0);
if (result < 0 || result > 0xffff || endptr != &numstr[nlen])
return -1;
return result;
}
struct usagedata {
char const *page_name;
char const *usage_name;
size_t page_len;
size_t usage_len;
int isfinal;
u_int32_t usage_id;
};
/*
* Test a rule against the current usage data. Returns -1 on no
* match, 0 on partial match and 1 on complete match.
*/
static int
hidtestrule(struct Susbvar *var, struct usagedata *cache)
{
char const *varname;
ssize_t matchindex, pagesplit;
size_t strind, varlen;
int numusage;
u_int32_t usage_id;
matchindex = var->matchindex;
varname = var->variable;
varlen = var->varlen;
usage_id = cache->usage_id;
/*
* Parse the current variable name, locating the end of the
* current 'usage', and possibly where the usage page name
* ends.
*/
pagesplit = -1;
for (strind = matchindex; strind < varlen; strind++) {
if (varname[strind] == DELIM_USAGE)
break;
if (varname[strind] == DELIM_PAGE)
pagesplit = strind;
}
if (cache->isfinal && strind != varlen)
/*
* Variable name is too long (hit delimiter instead of
* end-of-variable).
*/
return -1;
if (pagesplit >= 0) {
/*
* Page name was specified, determine whether it was
* symbolic or numeric.
*/
char const *strstart;
int numpage;
strstart = &varname[matchindex];
numpage = strtousage(strstart, pagesplit - matchindex);
if (numpage >= 0) {
/* Valid numeric */
if (numpage != (int)HID_PAGE(usage_id))
/* Numeric didn't match page ID */
return -1;
} else {
/* Not a valid numeric */
/*
* Load and cache the page name if and only if
* it hasn't already been loaded (it's a
* fairly expensive operation).
*/
if (cache->page_name == NULL) {
cache->page_name = hid_usage_page(HID_PAGE(usage_id));
cache->page_len = strlen(cache->page_name);
}
/*
* Compare specified page name to actual page
* name.
*/
if (cache->page_len !=
(size_t)(pagesplit - matchindex) ||
memcmp(cache->page_name,
&varname[matchindex],
cache->page_len) != 0)
/* Mismatch, page name wrong */
return -1;
}
/* Page matches, discard page name */
matchindex = pagesplit + 1;
}
numusage = strtousage(&varname[matchindex], strind - matchindex);
if (numusage >= 0) {
/* Valid numeric */
if (numusage != (int)HID_USAGE(usage_id))
/* Numeric didn't match usage ID */
return -1;
} else {
/* Not a valid numeric */
/* Load and cache the usage name */
if (cache->usage_name == NULL) {
cache->usage_name = hid_usage_in_page(usage_id);
cache->usage_len = strlen(cache->usage_name);
}
/*
* Compare specified usage name to actual usage name
*/
if (cache->usage_len != (size_t)(strind - matchindex) ||
memcmp(cache->usage_name, &varname[matchindex],
cache->usage_len) != 0)
/* Mismatch, usage name wrong */
return -1;
}
if (cache->isfinal)
/* Match */
return 1;
/*
* Partial match: Move index past this usage string +
* delimiter
*/
var->matchindex = strind + 1;
return 0;
}
/*
* Clear state in HID variable records used by hidmatch().
*/
static void
resethidvars(struct Susbvar *varlist, size_t vlsize)
{
size_t vlind;
for (vlind = 0; vlind < vlsize; vlind++)
varlist[vlind].matchcount = 0;
}
/*
* hidmatch() determines whether the item specified in 'item', and
* nested within a hierarchy of collections specified in 'collist'
* matches any of the rules in the list 'varlist'. Returns the
* matching rule on success, or NULL on no match.
*/
static struct Susbvar*
hidmatch(u_int32_t const *collist, size_t collen, struct hid_item *item,
struct Susbvar *varlist, size_t vlsize)
{
struct Susbvar *result;
size_t colind, vlactive, vlind;
int iscollection;
/*
* Keep track of how many variables are still "active". When
* the active count reaches zero, don't bother to continue
* looking for matches.
*/
vlactive = vlsize;
iscollection = item->kind == hid_collection ||
item->kind == hid_endcollection;
for (vlind = 0; vlind < vlsize; vlind++) {
struct Susbvar *var;
var = &varlist[vlind];
var->matchindex = 0;
if (!(var->mflags & MATCH_COLLECTIONS) && iscollection) {
/* Don't match collections for this variable */
var->matchindex = -1;
vlactive--;
} else if (!iscollection && !(var->mflags & MATCH_CONSTANTS) &&
(item->flags & HIO_CONST)) {
/*
* Don't match constants for this variable,
* but ignore the constant bit on collections.
*/
var->matchindex = -1;
vlactive--;
} else if ((var->mflags & MATCH_WRITABLE) &&
((item->kind != hid_output &&
item->kind != hid_feature) ||
(item->flags & HIO_CONST))) {
/*
* If we are only matching writable items, if
* this is not an output or feature kind, or
* it is a constant, reject it.
*/
var->matchindex = -1;
vlactive--;
} else if (var->mflags & MATCH_ALL) {
/* Match immediately */
return &varlist[vlind];
}
}
/*
* Loop through each usage in the collection list, including
* the 'item' itself on the final iteration. For each usage,
* test which variables named in the rule list are still
* applicable - if any.
*/
result = NULL;
for (colind = 0; vlactive > 0 && colind <= collen; colind++) {
struct usagedata cache;
cache.page_len = 0; /* XXX gcc */
cache.usage_len = 0; /* XXX gcc */
cache.isfinal = (colind == collen);
if (cache.isfinal)
cache.usage_id = item->usage;
else
cache.usage_id = collist[colind];
cache.usage_name = NULL;
cache.page_name = NULL;
/*
* Loop through each rule, testing whether the rule is
* still applicable or not. For each rule,
* 'matchindex' retains the current match state as an
* index into the variable name string, or -1 if this
* rule has been proven not to match.
*/
for (vlind = 0; vlind < vlsize; vlind++) {
struct Susbvar *var;
int matchres;
var = &varlist[vlind];
if (var->matchindex < 0)
/* Mismatch at a previous level */
continue;
matchres = hidtestrule(var, &cache);
if (matchres == 0)
/* Partial match */
continue;
if (matchres > 0) {
/* Complete match */
if (var->usageinstance < 0 ||
var->matchcount == var->usageinstance)
result = var;
var->matchcount++;
}
/*
* We either matched completely, or not at
* all. Either way, this variable is no
* longer active.
*/
var->matchindex = -1;
vlactive--;
}
}
return result;
}
static void
allocreport(struct Sreport *report, report_desc_t rd, int repindex)
{
int reptsize;
reptsize = hid_report_size(rd, reptoparam[repindex].hid_kind, reportid);
if (reptsize < 0)
errx(1, "Negative report size");
report->size = reptsize;
if (report->size > 0) {
/*
* Allocate a buffer with enough space for the
* report in the variable-sized data field.
*/
report->buffer = malloc(sizeof(*report->buffer) -
sizeof(report->buffer->ucr_data) +
report->size);
if (report->buffer == NULL)
err(1, NULL);
} else
report->buffer = NULL;
report->status = srs_clean;
}
static void
freereport(struct Sreport *report)
{
if (report->buffer != NULL)
free(report->buffer);
report->status = srs_uninit;
}
static void
getreport(struct Sreport *report, int hidfd, report_desc_t rd, int repindex)
{
if (report->status == srs_uninit) {
allocreport(report, rd, repindex);
if (report->size == 0)
return;
report->buffer->ucr_report = reptoparam[repindex].uhid_report;
if (report->use_getreport) {
if (ioctl(hidfd, USB_GET_REPORT, report->buffer) < 0)
err(1, "USB_GET_REPORT(%s) [probably not "
"supported by device]",
reptoparam[repindex].name);
} else {
memset(report->buffer->ucr_data, '\0', report->size);
}
}
}
static void
setreport(struct Sreport *report, int hidfd, int repindex)
{
if (report->status == srs_dirty) {
report->buffer->ucr_report = reptoparam[repindex].uhid_report;
if (ioctl(hidfd, USB_SET_REPORT, report->buffer) < 0)
err(1, "USB_SET_REPORT(%s)",
reptoparam[repindex].name);
report->status = srs_clean;
}
}
/* ARGSUSED1 */
static int
varop_value(struct hid_item *item, struct Susbvar *var,
u_int32_t const *collist, size_t collen, u_char *buf)
{
printf("%d\n", hid_get_data(buf, item));
return 0;
}
/* ARGSUSED1 */
static int
varop_display(struct hid_item *item, struct Susbvar *var,
u_int32_t const *collist, size_t collen, u_char *buf)
{
size_t colitem;
int val, i;
for (i = 0; i < item->report_count; i++) {
for (colitem = 0; colitem < collen; colitem++) {
if (var->mflags & MATCH_SHOWPAGENAME)
printf("%s:",
hid_usage_page(HID_PAGE(collist[colitem])));
printf("%s.", hid_usage_in_page(collist[colitem]));
}
if (var->mflags & MATCH_SHOWPAGENAME)
printf("%s:", hid_usage_page(HID_PAGE(item->usage)));
val = hid_get_data(buf, item);
item->pos += item->report_size;
if (item->usage_minimum != 0 || item->usage_maximum != 0) {
val += item->usage_minimum;
printf("%s=1", hid_usage_in_page(val));
} else {
printf("%s=%d%s", hid_usage_in_page(item->usage),
val, item->flags & HIO_CONST ? " (const)" : "");
}
if (item->report_count > 1)
printf(" [%d]", i);
printf("\n");
}
return 0;
}
/* ARGSUSED1 */
static int
varop_modify(struct hid_item *item, struct Susbvar *var,
u_int32_t const *collist, size_t collen, u_char *buf)
{
u_int dataval;
dataval = (u_int)strtol(var->value, NULL, 10);
hid_set_data(buf, item, dataval);
if (var->mflags & MATCH_SHOWVALUES)
/* Display set value */
varop_display(item, var, collist, collen, buf);
return 1;
}
static void
reportitem(char const *label, struct hid_item const *item, unsigned int mflags)
{
int isconst = item->flags & HIO_CONST,
isvar = item->flags & HIO_VARIABLE;
printf("%s size=%d count=%d%s%s page=%s", label,
item->report_size, item->report_count,
isconst ? " Const" : "",
!isvar && !isconst ? " Array" : "",
hid_usage_page(HID_PAGE(item->usage)));
if (item->usage_minimum != 0 || item->usage_maximum != 0) {
printf(" usage=%s..%s", hid_usage_in_page(item->usage_minimum),
hid_usage_in_page(item->usage_maximum));
if (mflags & MATCH_SHOWNUMERIC)
printf(" (%u:0x%x..%u:0x%x)",
HID_PAGE(item->usage_minimum),
HID_USAGE(item->usage_minimum),
HID_PAGE(item->usage_maximum),
HID_USAGE(item->usage_maximum));
} else {
printf(" usage=%s", hid_usage_in_page(item->usage));
if (mflags & MATCH_SHOWNUMERIC)
printf(" (%u:0x%x)",
HID_PAGE(item->usage), HID_USAGE(item->usage));
}
printf(", logical range %d..%d",
item->logical_minimum, item->logical_maximum);
if (item->physical_minimum != item->physical_maximum)
printf(", physical range %d..%d",
item->physical_minimum, item->physical_maximum);
if (item->unit)
printf(", unit=0x%02x exp=%d", item->unit,
item->unit_exponent);
printf("\n");
}
/* ARGSUSED1 */
static int
varop_report(struct hid_item *item, struct Susbvar *var,
u_int32_t const *collist, size_t collen, u_char *buf)
{
switch (item->kind) {
case hid_collection:
printf("Collection page=%s usage=%s",
hid_usage_page(HID_PAGE(item->usage)),
hid_usage_in_page(item->usage));
if (var->mflags & MATCH_SHOWNUMERIC)
printf(" (%u:0x%x)\n",
HID_PAGE(item->usage), HID_USAGE(item->usage));
else
printf("\n");
break;
case hid_endcollection:
printf("End collection\n");
break;
case hid_input:
reportitem("Input ", item, var->mflags);
break;
case hid_output:
reportitem("Output ", item, var->mflags);
break;
case hid_feature:
reportitem("Feature", item, var->mflags);
break;
}
return 0;
}
static void
devloop(int hidfd, report_desc_t rd, struct Susbvar *varlist, size_t vlsize)
{
u_char *dbuf;
struct hid_data *hdata;
size_t collind, dlen;
struct hid_item hitem;
u_int32_t colls[256];
struct Sreport inreport;
allocreport(&inreport, rd, REPORT_INPUT);
if (inreport.size <= 0)
errx(1, "Input report descriptor invalid length");
dlen = inreport.size;
dbuf = inreport.buffer->ucr_data;
for (;;) {
ssize_t readlen;
readlen = read(hidfd, dbuf, dlen);
if (readlen < 0)
err(1, "Device read error");
if (dlen != (size_t)readlen)
errx(1, "Unexpected response length: %lu != %lu",
(unsigned long)readlen, (unsigned long)dlen);
collind = 0;
resethidvars(varlist, vlsize);
hdata = hid_start_parse(rd, 1 << hid_input, reportid);
if (hdata == NULL)
errx(1, "Failed to start parser");
while (hid_get_item(hdata, &hitem)) {
struct Susbvar *matchvar;
switch (hitem.kind) {
case hid_collection:
if (collind >= (sizeof(colls) / sizeof(*colls)))
errx(1, "Excessive nested collections");
colls[collind++] = hitem.usage;
break;
case hid_endcollection:
if (collind == 0)
errx(1, "Excessive collection ends");
collind--;
break;
case hid_input:
break;
case hid_output:
case hid_feature:
errx(1, "Unexpected non-input item returned");
}
if (reportid != -1 && hitem.report_ID != reportid)
continue;
matchvar = hidmatch(colls, collind, &hitem,
varlist, vlsize);
if (matchvar != NULL)
matchvar->opfunc(&hitem, matchvar,
colls, collind,
inreport.buffer->ucr_data);
}
hid_end_parse(hdata);
printf("\n");
}
/* NOTREACHED */
}
static void
devshow(int hidfd, report_desc_t rd, struct Susbvar *varlist, size_t vlsize,
int zeromode, int kindset)
{
struct hid_data *hdata;
size_t collind, repind, vlind;
struct hid_item hitem;
u_int32_t colls[256];
struct Sreport reports[REPORT_MAXVAL + 1];
for (repind = 0; repind < (sizeof(reports) / sizeof(*reports));
repind++) {
reports[repind].status = srs_uninit;
reports[repind].buffer = NULL;
reports[repind].use_getreport = !zeromode;
}
collind = 0;
resethidvars(varlist, vlsize);
hdata = hid_start_parse(rd, kindset, reportid);
if (hdata == NULL)
errx(1, "Failed to start parser");
while (hid_get_item(hdata, &hitem)) {
struct Susbvar *matchvar;
int repindex;
if (verbose > 3)
printf("item: kind=%d repid=%d usage=0x%x\n",
hitem.kind, hitem.report_ID, hitem.usage);
repindex = -1;
switch (hitem.kind) {
case hid_collection:
if (collind >= (sizeof(colls) / sizeof(*colls)))
errx(1, "Excessive nested collections");
colls[collind++] = hitem.usage;
break;
case hid_endcollection:
if (collind == 0)
errx(1, "Excessive collection ends");
collind--;
break;
case hid_input:
repindex = REPORT_INPUT;
break;
case hid_output:
repindex = REPORT_OUTPUT;
break;
case hid_feature:
repindex = REPORT_FEATURE;
break;
}
if (reportid != -1 && hitem.report_ID != reportid)
continue;
matchvar = hidmatch(colls, collind, &hitem, varlist, vlsize);
if (matchvar != NULL) {
u_char *bufdata;
struct Sreport *repptr;
matchvar->mflags |= MATCH_WASMATCHED;
if (repindex >= 0)
repptr = &reports[repindex];
else
repptr = NULL;
if (repptr != NULL &&
!(matchvar->mflags & MATCH_NODATA))
getreport(repptr, hidfd, rd, repindex);
bufdata = (repptr == NULL || repptr->buffer == NULL) ?
NULL : repptr->buffer->ucr_data;
if (matchvar->opfunc(&hitem, matchvar, colls, collind,
bufdata) && repptr)
repptr->status = srs_dirty;
}
}
hid_end_parse(hdata);
for (repind = 0; repind < (sizeof(reports) / sizeof(*reports));
repind++) {
setreport(&reports[repind], hidfd, repind);
freereport(&reports[repind]);
}
/* Warn about any items that we couldn't find a match for */
for (vlind = 0; vlind < vlsize; vlind++) {
struct Susbvar *var;
var = &varlist[vlind];
if (var->variable != NULL &&
!(var->mflags & MATCH_WASMATCHED))
warnx("Failed to match: %.*s", (int)var->varlen,
var->variable);
}
}
static void
usage(void)
{
const char *progname = getprogname();
fprintf(stderr, "usage: %s -f device [-t tablefile] [-lv] -a\n",
progname);
fprintf(stderr, " %s -f device [-t tablefile] [-v] -r\n",
progname);
fprintf(stderr,
" %s -f device [-t tablefile] [-lnv] item [...]\n",
progname);
fprintf(stderr,
" %s -f device [-t tablefile] [-z] -w item=value [...]\n",
progname);
exit(1);
}
int
main(int argc, char **argv)
{
char const *dev;
char const *table;
size_t varnum;
int aflag, lflag, nflag, rflag, wflag, zflag;
int ch, hidfd;
report_desc_t repdesc;
char devnamebuf[PATH_MAX];
struct Susbvar variables[128];
aflag = lflag = nflag = rflag = verbose = wflag = zflag = 0;
dev = NULL;
table = NULL;
while ((ch = getopt(argc, argv, "?af:lnrt:vwz")) != -1) {
switch (ch) {
case 'a':
aflag = 1;
break;
case 'f':
dev = optarg;
break;
case 'l':
lflag = 1;
break;
case 'n':
nflag = 1;
break;
case 'r':
rflag = 1;
break;
case 't':
table = optarg;
break;
case 'v':
verbose++;
break;
case 'w':
wflag = 1;
break;
case 'z':
zflag = 1;
break;
case '?':
default:
usage();
/* NOTREACHED */
}
}
argc -= optind;
argv += optind;
if (dev == NULL || (lflag && (wflag || rflag))) {
/*
* No device specified, or attempting to loop and set
* or dump report at the same time
*/
usage();
/* NOTREACHED */
}
for (varnum = 0; varnum < (size_t)argc; varnum++) {
char const *name, *valuesep, *varinst;
struct Susbvar *svar;
size_t namelen;
svar = &variables[varnum];
name = argv[varnum];
valuesep = strchr(name, DELIM_SET);
svar->variable = name;
svar->mflags = 0;
svar->usageinstance = 0;
if (valuesep == NULL) {
/* Read variable */
if (wflag)
errx(1, "Must not specify -w to read variables");
svar->value = NULL;
namelen = strlen(name);
if (nflag) {
/* Display value of variable only */
svar->opfunc = varop_value;
} else {
/* Display name and value of variable */
svar->opfunc = varop_display;
if (verbose >= 1)
/* Show page names in verbose modes */
svar->mflags |= MATCH_SHOWPAGENAME;
}
} else {
/* Write variable */
if (!wflag)
errx(2, "Must specify -w to set variables");
svar->mflags |= MATCH_WRITABLE;
if (verbose >= 1)
/*
* Allow displaying of set value in
* verbose mode. This isn't
* particularly useful though, so
* don't bother documenting it.
*/
svar->mflags |= MATCH_SHOWVALUES;
namelen = valuesep - name;
svar->value = valuesep + 1;
svar->opfunc = varop_modify;
}
varinst = memchr(name, DELIM_INSTANCE, namelen);
if (varinst != NULL && ++varinst != &name[namelen]) {
char *endptr;
svar->usageinstance = strtol(varinst, &endptr, 0);
if (&name[namelen] != (char const*)endptr)
errx(1, "%s%c%s", "Error parsing item "
"instance number after '",
DELIM_INSTANCE, "'");
namelen = varinst - 1 - name;
}
svar->varlen = namelen;
}
if (aflag || rflag) {
struct Susbvar *svar;
svar = &variables[varnum++];
svar->variable = NULL;
svar->mflags = MATCH_ALL;
if (rflag) {
/*
* Dump report descriptor. Do dump collection
* items also, and hint that it won't be
* necessary to get the item status.
*/
svar->opfunc = varop_report;
svar->mflags |= MATCH_COLLECTIONS | MATCH_NODATA;
switch (verbose) {
default:
/* Level 2: Show item numerics and constants */
svar->mflags |= MATCH_SHOWNUMERIC;
/* FALLTHROUGH */
case 1:
/* Level 1: Just show constants */
svar->mflags |= MATCH_CONSTANTS;
/* FALLTHROUGH */
case 0:
break;
}
} else {
/* Display name and value of variable */
svar->opfunc = varop_display;
switch (verbose) {
default:
/* Level 2: Show constants and page names */
svar->mflags |= MATCH_CONSTANTS;
/* FALLTHROUGH */
case 1:
/* Level 1: Just show page names */
svar->mflags |= MATCH_SHOWPAGENAME;
/* FALLTHROUGH */
case 0:
break;
}
}
}
if (varnum == 0) {
/* Nothing to do... Display usage information. */
usage();
/* NOTREACHED */
}
hid_init(table);
if (dev[0] != '/') {
snprintf(devnamebuf, sizeof(devnamebuf), "/dev/%s%s",
isdigit((unsigned char)dev[0]) ? "uhid" : "", dev);
dev = devnamebuf;
}
hidfd = open(dev, O_RDWR);
if (hidfd < 0)
err(1, "%s", dev);
if (ioctl(hidfd, USB_GET_REPORT_ID, &reportid) < 0)
reportid = -1;
if (verbose > 1)
printf("report ID=%d\n", reportid);
repdesc = hid_get_report_desc(hidfd);
if (repdesc == 0)
errx(1, "USB_GET_REPORT_DESC");
if (lflag) {
devloop(hidfd, repdesc, variables, varnum);
/* NOTREACHED */
}
if (rflag)
/* Report mode header */
printf("Report descriptor:\n");
devshow(hidfd, repdesc, variables, varnum, zflag,
1 << hid_input |
1 << hid_output |
1 << hid_feature);
if (rflag) {
/* Report mode trailer */
size_t repindex;
for (repindex = 0;
repindex < (sizeof(reptoparam) / sizeof(*reptoparam));
repindex++) {
int size;
size = hid_report_size(repdesc,
reptoparam[repindex].hid_kind,
reportid);
printf("Total %7s size %d bytes\n",
reptoparam[repindex].name, size);
}
}
hid_dispose_report_desc(repdesc);
exit(0);
/* NOTREACHED */
}
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