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alsa-utils/alsactl/init_parse.c
Jaroslav Kysela 511dd7a597 alsactl: init() - return error value from snd_card_iterator_sinit() call 
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2021-06-04 09:56:20 +02:00

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/*
* Advanced Linux Sound Architecture Control Program - Parse initialization files
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>,
* Greg Kroah-Hartman <greg@kroah.com>,
* Kay Sievers <kay.sievers@vrfy.org>
*
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <stdlib.h>
#include <stdio.h>
#include <stddef.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <ctype.h>
#include <errno.h>
#include <fnmatch.h>
#include <sys/stat.h>
#include <sys/un.h>
#include <sys/wait.h>
#include <sys/select.h>
#include <sys/types.h>
#include <dirent.h>
#include <math.h>
#include "aconfig.h"
#include "alsactl.h"
#include "list.h"
#define PATH_SIZE 512
#define NAME_SIZE 128
#define EJUSTRETURN 0x7fffffff
enum key_op {
KEY_OP_UNSET,
KEY_OP_MATCH,
KEY_OP_NOMATCH,
KEY_OP_ADD,
KEY_OP_ASSIGN,
KEY_OP_ASSIGN_FINAL
};
struct pair {
char *key;
char *value;
struct pair *next;
};
struct space {
struct pair *pairs;
char *rootdir;
char *go_to;
char *program_result;
const char *filename;
int linenum;
int log_run;
int exit_code;
int quit;
unsigned int ctl_id_changed;
snd_hctl_t *ctl_handle;
snd_ctl_card_info_t *ctl_card_info;
snd_ctl_elem_id_t *ctl_id;
snd_ctl_elem_info_t *ctl_info;
snd_ctl_elem_value_t *ctl_value;
};
static void Perror(struct space *space, const char *fmt, ...)
{
va_list arg;
va_start(arg, fmt);
fprintf(stderr, "%s:%i: ", space->filename, space->linenum);
vfprintf(stderr, fmt, arg);
putc('\n', stderr);
va_end(arg);
}
#include "init_sysdeps.c"
#include "init_utils_string.c"
#include "init_utils_run.c"
#include "init_sysfs.c"
static void free_space(struct space *space)
{
struct pair *pair = space->pairs;
struct pair *next = pair;
while (next) {
pair = next;
next = pair->next;
free(pair->value);
free(pair->key);
free(pair);
}
space->pairs = NULL;
if (space->ctl_value) {
snd_ctl_elem_value_free(space->ctl_value);
space->ctl_value = NULL;
}
if (space->ctl_info) {
snd_ctl_elem_info_free(space->ctl_info);
space->ctl_info = NULL;
}
if (space->ctl_id) {
snd_ctl_elem_id_free(space->ctl_id);
space->ctl_id = NULL;
}
if (space->ctl_card_info) {
snd_ctl_card_info_free(space->ctl_card_info);
space->ctl_card_info = NULL;
}
if (space->ctl_handle) {
snd_hctl_close(space->ctl_handle);
space->ctl_handle = NULL;
}
if (space->rootdir)
free(space->rootdir);
if (space->program_result)
free(space->program_result);
if (space->go_to)
free(space->go_to);
free(space);
}
static struct pair *value_find(struct space *space, const char *key)
{
struct pair *pair = space->pairs;
while (pair && strcmp(pair->key, key) != 0)
pair = pair->next;
return pair;
}
static int value_set(struct space *space, const char *key, const char *value)
{
struct pair *pair;
pair = value_find(space, key);
if (pair) {
free(pair->value);
pair->value = strdup(value);
if (pair->value == NULL)
return -ENOMEM;
} else {
pair = malloc(sizeof(struct pair));
if (pair == NULL)
return -ENOMEM;
pair->key = strdup(key);
if (pair->key == NULL) {
free(pair);
return -ENOMEM;
}
pair->value = strdup(value);
if (pair->value == NULL) {
free(pair->key);
free(pair);
return -ENOMEM;
}
pair->next = space->pairs;
space->pairs = pair;
}
return 0;
}
static int init_space(struct space **space, int card)
{
struct space *res;
char device[16];
int err;
res = calloc(1, sizeof(struct space));
if (res == NULL)
return -ENOMEM;
res->ctl_id_changed = ~0;
res->linenum = -1;
sprintf(device, "hw:%d", card);
err = snd_hctl_open(&res->ctl_handle, device, 0);
if (err < 0)
goto error;
err = snd_hctl_load(res->ctl_handle);
if (err < 0)
goto error;
err = snd_ctl_card_info_malloc(&res->ctl_card_info);
if (err < 0)
goto error;
err = snd_ctl_card_info(snd_hctl_ctl(res->ctl_handle), res->ctl_card_info);
if (err < 0)
goto error;
err = snd_ctl_elem_id_malloc(&res->ctl_id);
if (err < 0)
goto error;
err = snd_ctl_elem_info_malloc(&res->ctl_info);
if (err < 0)
goto error;
err = snd_ctl_elem_value_malloc(&res->ctl_value);
if (err < 0)
goto error;
*space = res;
return 0;
error:
free_space(res);
return err;
}
static const char *cardinfo_get(struct space *space, const char *attr)
{
if (strncasecmp(attr, "CARD", 4) == 0) {
static char res[16];
sprintf(res, "%u", snd_ctl_card_info_get_card(space->ctl_card_info));
return res;
}
if (strncasecmp(attr, "ID", 2) == 0)
return snd_ctl_card_info_get_id(space->ctl_card_info);
if (strncasecmp(attr, "DRIVER", 6) == 0)
return snd_ctl_card_info_get_driver(space->ctl_card_info);
if (strncasecmp(attr, "NAME", 4) == 0)
return snd_ctl_card_info_get_name(space->ctl_card_info);
if (strncasecmp(attr, "LONGNAME", 8) == 0)
return snd_ctl_card_info_get_longname(space->ctl_card_info);
if (strncasecmp(attr, "MIXERNAME", 9) == 0)
return snd_ctl_card_info_get_mixername(space->ctl_card_info);
if (strncasecmp(attr, "COMPONENTS", 10) == 0)
return snd_ctl_card_info_get_components(space->ctl_card_info);
Perror(space, "unknown cardinfo{} attribute '%s'", attr);
return NULL;
}
static int check_id_changed(struct space *space, unsigned int what)
{
snd_hctl_elem_t *elem;
int err;
if ((space->ctl_id_changed & what & 1) != 0) {
snd_ctl_elem_id_set_numid(space->ctl_id, 0);
elem = snd_hctl_find_elem(space->ctl_handle, space->ctl_id);
if (!elem)
return -ENOENT;
err = snd_hctl_elem_info(elem, space->ctl_info);
if (err == 0)
space->ctl_id_changed &= ~1;
return err;
}
if ((space->ctl_id_changed & what & 2) != 0) {
snd_ctl_elem_id_set_numid(space->ctl_id, 0);
elem = snd_hctl_find_elem(space->ctl_handle, space->ctl_id);
if (!elem)
return -ENOENT;
err = snd_hctl_elem_read(elem, space->ctl_value);
if (err == 0)
space->ctl_id_changed &= ~2;
return err;
}
return 0;
}
static const char *get_ctl_value(struct space *space)
{
snd_ctl_elem_type_t type;
unsigned int idx, count;
static char res[1024], tmp[16];
static const char hex[] = "0123456789abcdef";
char *pos;
const char *pos1;
type = snd_ctl_elem_info_get_type(space->ctl_info);
count = snd_ctl_elem_info_get_count(space->ctl_info);
res[0] = '\0';
switch (type) {
case SND_CTL_ELEM_TYPE_BOOLEAN:
for (idx = 0; idx < count; idx++) {
if (idx > 0)
strlcat(res, ",", sizeof(res));
strlcat(res, snd_ctl_elem_value_get_boolean(space->ctl_value, idx) ? "on" : "off", sizeof(res));
}
break;
case SND_CTL_ELEM_TYPE_INTEGER:
for (idx = 0; idx < count; idx++) {
if (idx > 0)
strlcat(res, ",", sizeof(res));
snprintf(tmp, sizeof(tmp), "%li", snd_ctl_elem_value_get_integer(space->ctl_value, idx));
strlcat(res, tmp, sizeof(res));
}
break;
case SND_CTL_ELEM_TYPE_INTEGER64:
for (idx = 0; idx < count; idx++) {
if (idx > 0)
strlcat(res, ",", sizeof(res));
snprintf(tmp, sizeof(tmp), "%lli", snd_ctl_elem_value_get_integer64(space->ctl_value, idx));
strlcat(res, tmp, sizeof(res));
}
break;
case SND_CTL_ELEM_TYPE_ENUMERATED:
for (idx = 0; idx < count; idx++) {
if (idx > 0)
strlcat(res, ",", sizeof(res));
snprintf(tmp, sizeof(tmp), "%u", snd_ctl_elem_value_get_enumerated(space->ctl_value, idx));
strlcat(res, tmp, sizeof(res));
}
break;
case SND_CTL_ELEM_TYPE_BYTES:
case SND_CTL_ELEM_TYPE_IEC958:
if (type == SND_CTL_ELEM_TYPE_IEC958)
count = sizeof(snd_aes_iec958_t);
if (count > (sizeof(res)-1)/2)
count = (sizeof(res)-1/2);
pos = res;
pos1 = snd_ctl_elem_value_get_bytes(space->ctl_value);
while (count > 0) {
idx = *pos1++;
*pos++ = hex[idx >> 4];
*pos++ = hex[idx & 0x0f];
count++;
}
*pos++ = '\0';
break;
default:
Perror(space, "unknown element type '%i'", type);
return NULL;
}
return res;
}
/* Function to convert from percentage to volume. val = percentage */
#define convert_prange1(val, min, max) \
ceil((val) * ((max) - (min)) * 0.01 + (min))
static int set_ctl_value(struct space *space, const char *value, int all)
{
snd_ctl_elem_type_t type;
unsigned int idx, idx2, count, items;
const char *pos, *pos2;
snd_hctl_elem_t *elem;
int val;
long lval;
type = snd_ctl_elem_info_get_type(space->ctl_info);
count = snd_ctl_elem_info_get_count(space->ctl_info);
switch (type) {
case SND_CTL_ELEM_TYPE_BOOLEAN:
for (idx = 0; idx < count; idx++) {
while (*value == ' ')
value++;
if (*value == '\0')
goto missing;
val = strncasecmp(value, "true", 4) == 0 ||
strncasecmp(value, "yes", 3) == 0 ||
strncasecmp(value, "on", 2) == 0 ||
strncasecmp(value, "1", 1) == 0;
snd_ctl_elem_value_set_boolean(space->ctl_value, idx, val);
if (all)
continue;
pos = strchr(value, ',');
value = pos ? pos + 1 : value + strlen(value) - 1;
}
break;
case SND_CTL_ELEM_TYPE_INTEGER:
for (idx = 0; idx < count; idx++) {
while (*value == ' ')
value++;
pos = strchr(value, ',');
if (pos)
*(char *)pos = '\0';
remove_trailing_chars((char *)value, ' ');
items = pos ? pos - value : strlen(value);
if (items > 1 && value[items-1] == '%') {
val = convert_prange1(strtol(value, NULL, 0), snd_ctl_elem_info_get_min(space->ctl_info), snd_ctl_elem_info_get_max(space->ctl_info));
snd_ctl_elem_value_set_integer(space->ctl_value, idx, val);
} else if (items > 2 && value[items-2] == 'd' && value[items-1] == 'B') {
val = strtol(value, NULL, 0) * 100;
if ((pos2 = strchr(value, '.')) != NULL) {
if (isdigit(*(pos2-1)) && isdigit(*(pos2-2))) {
if (val < 0)
val -= strtol(pos2 + 1, NULL, 0);
else
val += strtol(pos2 + 1, NULL, 0);
} else if (isdigit(*(pos2-1))) {
if (val < 0)
val -= strtol(pos2 + 1, NULL, 0) * 10;
else
val += strtol(pos2 + 1, NULL, 0) * 10;
}
}
val = snd_ctl_convert_from_dB(snd_hctl_ctl(space->ctl_handle), space->ctl_id, val, &lval, -1);
if (val < 0) {
dbg("unable to convert dB value '%s' to internal integer range", value);
return val;
}
snd_ctl_elem_value_set_integer(space->ctl_value, idx, lval);
} else {
snd_ctl_elem_value_set_integer(space->ctl_value, idx, strtol(value, NULL, 0));
}
if (all)
continue;
value = pos ? pos + 1 : value + strlen(value) - 1;
}
break;
case SND_CTL_ELEM_TYPE_INTEGER64:
for (idx = 0; idx < count; idx++) {
while (*value == ' ')
value++;
snd_ctl_elem_value_set_integer64(space->ctl_value, idx, strtoll(value, NULL, 0));
if (all)
continue;
pos = strchr(value, ',');
value = pos ? pos + 1 : value + strlen(value) - 1;
}
break;
case SND_CTL_ELEM_TYPE_ENUMERATED:
for (idx = 0; idx < count; idx++) {
while (*value == ' ')
value++;
pos = strchr(value, ',');
if (isdigit(value[0]) || value[0] == '-') {
snd_ctl_elem_value_set_enumerated(space->ctl_value, idx, strtol(value, NULL, 0));
} else {
if (pos)
*(char *)pos = '\0';
remove_trailing_chars((char *)value, ' ');
items = snd_ctl_elem_info_get_items(space->ctl_info);
for (idx2 = 0; idx2 < items; idx2++) {
snd_ctl_elem_info_set_item(space->ctl_info, idx2);
elem = snd_hctl_find_elem(space->ctl_handle, space->ctl_id);
if (elem == NULL)
return -ENOENT;
val = snd_hctl_elem_info(elem, space->ctl_info);
if (val < 0)
return val;
if (strcasecmp(snd_ctl_elem_info_get_item_name(space->ctl_info), value) == 0) {
snd_ctl_elem_value_set_enumerated(space->ctl_value, idx, idx2);
break;
}
}
if (idx2 >= items) {
Perror(space, "wrong enum identifier '%s'", value);
return -EINVAL;
}
}
if (all)
continue;
value = pos ? pos + 1 : value + strlen(value) - 1;
}
break;
case SND_CTL_ELEM_TYPE_BYTES:
case SND_CTL_ELEM_TYPE_IEC958:
if (type == SND_CTL_ELEM_TYPE_IEC958)
count = sizeof(snd_aes_iec958_t);
while (*value == ' ')
value++;
if (strlen(value) != count * 2) {
Perror(space, "bad ctl value hexa length (should be %u bytes)", count);
return -EINVAL;
}
for (idx = 0; idx < count; idx += 2) {
int nibble1 = hextodigit(*(value++));
int nibble2 = hextodigit(*(value++));
if (nibble1 < 0 || nibble2 < 0) {
Perror(space, "bad ctl hexa value");
return -EINVAL;
}
val = (nibble1 << 4) | nibble2;
snd_ctl_elem_value_set_byte(space->ctl_value, idx, val);
}
break;
default:
Perror(space, "unknown element type '%i'", type);
return -EINVAL;
}
return 0;
missing:
Perror(space, "missing some ctl values (line %i)", space->linenum);
return -EINVAL;
}
static int do_match(const char *key, enum key_op op,
const char *key_value, const char *value)
{
int match;
if (value == NULL)
return 0;
dbg("match %s '%s' <-> '%s'", key, key_value, value);
match = fnmatch(key_value, value, 0) == 0;
if (match && op == KEY_OP_MATCH) {
dbg("%s is true (matching value)", key);
return 1;
}
if (!match && op == KEY_OP_NOMATCH) {
dbg("%s is true (non-matching value)", key);
return 1;
}
dbg("%s is false", key);
return 0;
}
static int ctl_match(snd_ctl_elem_id_t *pattern, snd_ctl_elem_id_t *id)
{
if (snd_ctl_elem_id_get_interface(pattern) != -1 &&
snd_ctl_elem_id_get_interface(pattern) != snd_ctl_elem_id_get_interface(id))
return 0;
if (snd_ctl_elem_id_get_device(pattern) != -1 &&
snd_ctl_elem_id_get_device(pattern) != snd_ctl_elem_id_get_device(id))
return 0;
if (snd_ctl_elem_id_get_subdevice(pattern) != -1 &&
snd_ctl_elem_id_get_subdevice(pattern) != snd_ctl_elem_id_get_subdevice(id))
return 0;
if (snd_ctl_elem_id_get_index(pattern) != -1 &&
snd_ctl_elem_id_get_index(pattern) != snd_ctl_elem_id_get_index(id))
return 0;
if (fnmatch(snd_ctl_elem_id_get_name(pattern), snd_ctl_elem_id_get_name(id), 0) != 0)
return 0;
return 1;
}
static const char *elemid_get(struct space *space, const char *attr)
{
long long val;
snd_ctl_elem_type_t type;
static char res[256];
if (strncasecmp(attr, "numid", 5) == 0) {
val = snd_ctl_elem_id_get_numid(space->ctl_id);
goto value;
}
if (strncasecmp(attr, "iface", 5) == 0 ||
strncasecmp(attr, "interface", 9) == 0)
return snd_ctl_elem_iface_name(snd_ctl_elem_id_get_interface(space->ctl_id));
if (strncasecmp(attr, "device", 6) == 0) {
val = snd_ctl_elem_id_get_device(space->ctl_id);
goto value;
}
if (strncasecmp(attr, "subdev", 6) == 0) {
val = snd_ctl_elem_id_get_subdevice(space->ctl_id);
goto value;
}
if (strncasecmp(attr, "name", 4) == 0)
return snd_ctl_elem_id_get_name(space->ctl_id);
if (strncasecmp(attr, "index", 5) == 0) {
val = snd_ctl_elem_id_get_index(space->ctl_id);
goto value;
}
if (strncasecmp(attr, "type", 4) == 0) {
if (check_id_changed(space, 1))
return NULL;
return snd_ctl_elem_type_name(snd_ctl_elem_info_get_type(space->ctl_info));
}
if (strncasecmp(attr, "attr", 4) == 0) {
if (check_id_changed(space, 1))
return NULL;
res[0] = '\0';
if (snd_ctl_elem_info_is_readable(space->ctl_info))
strcat(res, "r");
if (snd_ctl_elem_info_is_writable(space->ctl_info))
strcat(res, "w");
if (snd_ctl_elem_info_is_volatile(space->ctl_info))
strcat(res, "v");
if (snd_ctl_elem_info_is_inactive(space->ctl_info))
strcat(res, "i");
if (snd_ctl_elem_info_is_locked(space->ctl_info))
strcat(res, "l");
if (snd_ctl_elem_info_is_tlv_readable(space->ctl_info))
strcat(res, "R");
if (snd_ctl_elem_info_is_tlv_writable(space->ctl_info))
strcat(res, "W");
if (snd_ctl_elem_info_is_tlv_commandable(space->ctl_info))
strcat(res, "C");
if (snd_ctl_elem_info_is_owner(space->ctl_info))
strcat(res, "o");
if (snd_ctl_elem_info_is_user(space->ctl_info))
strcat(res, "u");
return res;
}
if (strncasecmp(attr, "owner", 5) == 0) {
if (check_id_changed(space, 1))
return NULL;
val = snd_ctl_elem_info_get_owner(space->ctl_info);
goto value;
}
if (strncasecmp(attr, "count", 5) == 0) {
if (check_id_changed(space, 1))
return NULL;
val = snd_ctl_elem_info_get_count(space->ctl_info);
goto value;
}
if (strncasecmp(attr, "min", 3) == 0) {
if (check_id_changed(space, 1))
return NULL;
type = snd_ctl_elem_info_get_type(space->ctl_info);
if (type == SND_CTL_ELEM_TYPE_INTEGER64)
val = snd_ctl_elem_info_get_min64(space->ctl_info);
else if (type == SND_CTL_ELEM_TYPE_INTEGER)
val = snd_ctl_elem_info_get_min(space->ctl_info);
else
goto empty;
goto value;
}
if (strncasecmp(attr, "max", 3) == 0) {
if (check_id_changed(space, 1))
return NULL;
type = snd_ctl_elem_info_get_type(space->ctl_info);
if (type == SND_CTL_ELEM_TYPE_INTEGER64)
val = snd_ctl_elem_info_get_max64(space->ctl_info);
else if (type == SND_CTL_ELEM_TYPE_INTEGER)
val = snd_ctl_elem_info_get_max(space->ctl_info);
else
goto empty;
goto value;
}
if (strncasecmp(attr, "step", 3) == 0) {
if (check_id_changed(space, 1))
return NULL;
type = snd_ctl_elem_info_get_type(space->ctl_info);
if (type == SND_CTL_ELEM_TYPE_INTEGER64)
val = snd_ctl_elem_info_get_step64(space->ctl_info);
else if (type == SND_CTL_ELEM_TYPE_INTEGER)
val = snd_ctl_elem_info_get_step(space->ctl_info);
else
goto empty;
goto value;
}
if (strncasecmp(attr, "items", 5) == 0) {
if (check_id_changed(space, 1))
return NULL;
if (snd_ctl_elem_info_get_type(space->ctl_info) == SND_CTL_ELEM_TYPE_ENUMERATED)
val = snd_ctl_elem_info_get_items(space->ctl_info);
else {
empty:
res[0] = '\0';
return res;
}
goto value;
}
if (strncasecmp(attr, "value", 5) == 0) {
if (check_id_changed(space, 3))
return NULL;
return get_ctl_value(space);
}
if (strncasecmp(attr, "dBmin", 5) == 0) {
long min, max;
if (check_id_changed(space, 1))
return NULL;
if (snd_ctl_get_dB_range(snd_hctl_ctl(space->ctl_handle), space->ctl_id, &min, &max) < 0)
goto empty;
val = min;
dbvalue:
sprintf(res, "%li.%02idB", (long)(val / 100), (int)abs(val % 100));
return res;
}
if (strncasecmp(attr, "dBmax", 5) == 0) {
long min, max;
if (check_id_changed(space, 1))
return NULL;
if (snd_ctl_get_dB_range(snd_hctl_ctl(space->ctl_handle), space->ctl_id, &min, &max) < 0)
goto empty;
val = max;
goto dbvalue;
}
if (strncasecmp(attr, "enums", 5) == 0) {
unsigned int idx, items;
snd_hctl_elem_t *elem;
if (check_id_changed(space, 1))
return NULL;
if (snd_ctl_elem_info_get_type(space->ctl_info) != SND_CTL_ELEM_TYPE_ENUMERATED)
goto empty;
items = snd_ctl_elem_info_get_items(space->ctl_info);
strcpy(res, "|");
for (idx = 0; idx < items; idx++) {
snd_ctl_elem_info_set_item(space->ctl_info, idx);
elem = snd_hctl_find_elem(space->ctl_handle, space->ctl_id);
if (elem == NULL)
break;
if (snd_hctl_elem_info(elem, space->ctl_info) < 0)
break;
strlcat(res, snd_ctl_elem_info_get_item_name(space->ctl_info), sizeof(res));
strlcat(res, "|", sizeof(res));
}
return res;
}
if (strncasecmp(attr, "do_search", 9) == 0) {
int err, index = 0;
snd_hctl_elem_t *elem;
snd_ctl_elem_id_t *id;
char *pos = strchr(attr, ' ');
if (pos)
index = strtol(pos, NULL, 0);
err = snd_ctl_elem_id_malloc(&id);
if (err < 0)
return NULL;
elem = snd_hctl_first_elem(space->ctl_handle);
while (elem) {
snd_hctl_elem_get_id(elem, id);
if (!ctl_match(space->ctl_id, id))
goto next_search;
if (index > 0) {
index--;
goto next_search;
}
strcpy(res, "1");
snd_ctl_elem_id_copy(space->ctl_id, id);
snd_ctl_elem_id_free(id);
dbg("do_ctl_search found a control");
return res;
next_search:
elem = snd_hctl_elem_next(elem);
}
snd_ctl_elem_id_free(id);
strcpy(res, "0");
return res;
}
if (strncasecmp(attr, "do_count", 8) == 0) {
int err, index = 0;
snd_hctl_elem_t *elem;
snd_ctl_elem_id_t *id;
err = snd_ctl_elem_id_malloc(&id);
if (err < 0)
return NULL;
elem = snd_hctl_first_elem(space->ctl_handle);
while (elem) {
snd_hctl_elem_get_id(elem, id);
if (ctl_match(space->ctl_id, id))
index++;
elem = snd_hctl_elem_next(elem);
}
snd_ctl_elem_id_free(id);
sprintf(res, "%d", index);
dbg("do_ctl_count found %s controls", res);
return res;
}
Perror(space, "unknown ctl{} attribute '%s'", attr);
return NULL;
value:
sprintf(res, "%lli", val);
return res;
}
static int elemid_set(struct space *space, const char *attr, const char *value)
{
unsigned int val;
void (*fcn)(snd_ctl_elem_id_t *, unsigned int);
snd_ctl_elem_iface_t iface;
int err;
if (strncasecmp(attr, "numid", 5) == 0) {
fcn = snd_ctl_elem_id_set_numid;
goto value;
}
if (strncasecmp(attr, "iface", 5) == 0 ||
strncasecmp(attr, "interface", 9) == 0 ||
strncasecmp(attr, "reset", 5) == 0 ||
strncasecmp(attr, "search", 6) == 0) {
if (strlen(value) == 0 && strncasecmp(attr, "search", 6) == 0) {
iface = 0;
goto search;
}
for (iface = 0; iface <= SND_CTL_ELEM_IFACE_LAST; iface++) {
if (strcasecmp(value, snd_ctl_elem_iface_name(iface)) == 0) {
if (strncasecmp(attr, "reset", 5) == 0)
snd_ctl_elem_id_clear(space->ctl_id);
if (strncasecmp(attr, "search", 5) == 0) {
search:
snd_ctl_elem_id_clear(space->ctl_id);
/* -1 means all */
snd_ctl_elem_id_set_interface(space->ctl_id, -1);
snd_ctl_elem_id_set_device(space->ctl_id, -1);
snd_ctl_elem_id_set_subdevice(space->ctl_id, -1);
snd_ctl_elem_id_set_name(space->ctl_id, "*");
snd_ctl_elem_id_set_index(space->ctl_id, -1);
if (strlen(value) == 0)
return 0;
}
snd_ctl_elem_id_set_interface(space->ctl_id, iface);
space->ctl_id_changed = ~0;
return 0;
}
}
Perror(space, "unknown control interface name '%s'", value);
return -EINVAL;
}
if (strncasecmp(attr, "device", 6) == 0) {
fcn = snd_ctl_elem_id_set_device;
goto value;
}
if (strncasecmp(attr, "subdev", 6) == 0) {
fcn = snd_ctl_elem_id_set_subdevice;
goto value;
}
if (strncasecmp(attr, "name", 4) == 0) {
snd_ctl_elem_id_set_name(space->ctl_id, value);
space->ctl_id_changed = ~0;
return 0;
}
if (strncasecmp(attr, "index", 5) == 0) {
fcn = snd_ctl_elem_id_set_index;
goto value;
}
if (strncasecmp(attr, "values", 6) == 0 ||
strncasecmp(attr, "value", 5) == 0) {
err = check_id_changed(space, 1);
if (err < 0) {
Perror(space, "control element not found");
return err;
}
err = set_ctl_value(space, value, strncasecmp(attr, "values", 6) == 0);
if (err < 0) {
space->ctl_id_changed |= 2;
} else {
space->ctl_id_changed &= ~2;
snd_ctl_elem_value_set_id(space->ctl_value, space->ctl_id);
err = snd_ctl_elem_write(snd_hctl_ctl(space->ctl_handle), space->ctl_value);
if (err < 0) {
Perror(space, "value write error: %s", snd_strerror(err));
return err;
}
}
return err;
}
Perror(space, "unknown CTL{} attribute '%s'", attr);
return -EINVAL;
value:
val = (unsigned int)strtol(value, NULL, 0);
fcn(space->ctl_id, val);
space->ctl_id_changed = ~0;
return 0;
}
static int get_key(char **line, char **key, enum key_op *op, char **value)
{
char *linepos;
char *temp;
linepos = *line;
if (linepos == NULL && linepos[0] == '\0')
return -EINVAL;
/* skip whitespace */
while (isspace(linepos[0]) || linepos[0] == ',')
linepos++;
/* get the key */
if (linepos[0] == '\0')
return -EINVAL;
*key = linepos;
while (1) {
linepos++;
if (linepos[0] == '\0')
return -1;
if (isspace(linepos[0]))
break;
if (linepos[0] == '=')
break;
if (linepos[0] == '+')
break;
if (linepos[0] == '!')
break;
if (linepos[0] == ':')
break;
}
/* remember end of key */
temp = linepos;
/* skip whitespace after key */
while (isspace(linepos[0]))
linepos++;
if (linepos[0] == '\0')
return -EINVAL;
/* get operation type */
if (linepos[0] == '=' && linepos[1] == '=') {
*op = KEY_OP_MATCH;
linepos += 2;
dbg("operator=match");
} else if (linepos[0] == '!' && linepos[1] == '=') {
*op = KEY_OP_NOMATCH;
linepos += 2;
dbg("operator=nomatch");
} else if (linepos[0] == '+' && linepos[1] == '=') {
*op = KEY_OP_ADD;
linepos += 2;
dbg("operator=add");
} else if (linepos[0] == '=') {
*op = KEY_OP_ASSIGN;
linepos++;
dbg("operator=assign");
} else if (linepos[0] == ':' && linepos[1] == '=') {
*op = KEY_OP_ASSIGN_FINAL;
linepos += 2;
dbg("operator=assign_final");
} else
return -EINVAL;
/* terminate key */
temp[0] = '\0';
dbg("key='%s'", *key);
/* skip whitespace after operator */
while (isspace(linepos[0]))
linepos++;
if (linepos[0] == '\0')
return -EINVAL;
/* get the value*/
if (linepos[0] != '"')
return -EINVAL;
linepos++;
*value = linepos;
while (1) {
temp = strchr(linepos, '"');
if (temp && temp[-1] == '\\') {
linepos = temp + 1;
continue;
}
break;
}
if (!temp)
return -EINVAL;
temp[0] = '\0';
temp++;
dbg("value='%s'", *value);
/* move line to next key */
*line = temp;
return 0;
}
/* extract possible KEY{attr} */
static char *get_key_attribute(struct space *space, char *str, char *res, size_t ressize)
{
char *pos;
char *attr;
attr = strchr(str, '{');
if (attr != NULL) {
attr++;
pos = strchr(attr, '}');
if (pos == NULL) {
Perror(space, "missing closing brace for format");
return NULL;
}
pos[0] = '\0';
strlcpy(res, attr, ressize);
pos[0] = '}';
dbg("attribute='%s'", res);
return res;
}
return NULL;
}
/* extract possible {attr} and move str behind it */
static char *get_format_attribute(struct space *space, char **str)
{
char *pos;
char *attr = NULL;
if (*str[0] == '{') {
pos = strchr(*str, '}');
if (pos == NULL) {
Perror(space, "missing closing brace for format");
return NULL;
}
pos[0] = '\0';
attr = *str+1;
*str = pos+1;
dbg("attribute='%s', str='%s'", attr, *str);
}
return attr;
}
/* extract possible format length and move str behind it*/
static int get_format_len(struct space *space, char **str)
{
int num;
char *tail;
if (isdigit(*str[0])) {
num = (int) strtoul(*str, &tail, 10);
if (num > 0) {
*str = tail;
dbg("format length=%i", num);
return num;
} else {
Perror(space, "format parsing error '%s'", *str);
}
}
return -1;
}
static void apply_format(struct space *space, char *string, size_t maxsize)
{
char temp[PATH_SIZE];
char temp2[PATH_SIZE];
char *head, *tail, *pos, *cpos, *attr, *rest;
struct pair *pair;
int len;
int i;
int count;
enum subst_type {
SUBST_UNKNOWN,
SUBST_CARDINFO,
SUBST_CTL,
SUBST_RESULT,
SUBST_ATTR,
SUBST_SYSFSROOT,
SUBST_ENV,
SUBST_CONFIG,
};
static const struct subst_map {
char *name;
char fmt;
enum subst_type type;
} map[] = {
{ .name = "cardinfo", .fmt = 'i', .type = SUBST_CARDINFO },
{ .name = "ctl", .fmt = 'C', .type = SUBST_CTL },
{ .name = "result", .fmt = 'c', .type = SUBST_RESULT },
{ .name = "attr", .fmt = 's', .type = SUBST_ATTR },
{ .name = "sysfsroot", .fmt = 'r', .type = SUBST_SYSFSROOT },
{ .name = "env", .fmt = 'E', .type = SUBST_ENV },
{ .name = "config", .fmt = 'g', .type = SUBST_CONFIG },
{ NULL, '\0', 0 }
};
enum subst_type type;
const struct subst_map *subst;
head = string;
while (1) {
len = -1;
while (head[0] != '\0') {
if (head[0] == '$') {
/* substitute named variable */
if (head[1] == '\0')
break;
if (head[1] == '$') {
strlcpy(temp, head+2, sizeof(temp));
strlcpy(head+1, temp, maxsize);
head++;
continue;
}
head[0] = '\0';
for (subst = map; subst->name; subst++) {
if (strncasecmp(&head[1], subst->name, strlen(subst->name)) == 0) {
type = subst->type;
tail = head + strlen(subst->name)+1;
dbg("will substitute format name '%s'", subst->name);
goto found;
}
}
} else if (head[0] == '%') {
/* substitute format char */
if (head[1] == '\0')
break;
if (head[1] == '%') {
strlcpy(temp, head+2, sizeof(temp));
strlcpy(head+1, temp, maxsize);
head++;
continue;
}
head[0] = '\0';
tail = head+1;
len = get_format_len(space, &tail);
for (subst = map; subst->name; subst++) {
if (tail[0] == subst->fmt) {
type = subst->type;
tail++;
dbg("will substitute format char '%c'", subst->fmt);
goto found;
}
}
}
head++;
}
break;
found:
attr = get_format_attribute(space, &tail);
strlcpy(temp, tail, sizeof(temp));
dbg("format=%i, string='%s', tail='%s'", type ,string, tail);
switch (type) {
case SUBST_CARDINFO:
if (attr == NULL)
Perror(space, "missing identification parametr for cardinfo");
else {
const char *value = cardinfo_get(space, attr);
if (value == NULL)
break;
strlcat(string, value, maxsize);
dbg("substitute cardinfo{%s} '%s'", attr, value);
}
break;
case SUBST_CTL:
if (attr == NULL)
Perror(space, "missing identification parametr for ctl");
else {
const char *value = elemid_get(space, attr);
if (value == NULL)
break;
strlcat(string, value, maxsize);
dbg("substitute ctl{%s} '%s'", attr, value);
}
break;
case SUBST_RESULT:
if (space->program_result == NULL)
break;
/* get part part of the result string */
i = 0;
if (attr != NULL)
i = strtoul(attr, &rest, 10);
if (i > 0) {
dbg("request part #%d of result string", i);
cpos = space->program_result;
while (--i) {
while (cpos[0] != '\0' && !isspace(cpos[0]))
cpos++;
while (isspace(cpos[0]))
cpos++;
}
if (i > 0) {
Perror(space, "requested part of result string not found");
break;
}
strlcpy(temp2, cpos, sizeof(temp2));
/* %{2+}c copies the whole string from the second part on */
if (rest[0] != '+') {
cpos = strchr(temp2, ' ');
if (cpos)
cpos[0] = '\0';
}
strlcat(string, temp2, maxsize);
dbg("substitute part of result string '%s'", temp2);
} else {
strlcat(string, space->program_result, maxsize);
dbg("substitute result string '%s'", space->program_result);
}
break;
case SUBST_ATTR:
if (attr == NULL)
Perror(space, "missing file parameter for attr");
else {
const char *value = NULL;
size_t size;
pair = value_find(space, "sysfs_device");
if (pair == NULL)
break;
value = sysfs_attr_get_value(pair->value, attr);
if (value == NULL)
break;
/* strip trailing whitespace and replace untrusted characters of sysfs value */
size = strlcpy(temp2, value, sizeof(temp2));
if (size >= sizeof(temp2))
size = sizeof(temp2)-1;
while (size > 0 && isspace(temp2[size-1]))
temp2[--size] = '\0';
count = replace_untrusted_chars(temp2);
if (count > 0)
Perror(space, "%i untrusted character(s) replaced" , count);
strlcat(string, temp2, maxsize);
dbg("substitute sysfs value '%s'", temp2);
}
break;
case SUBST_SYSFSROOT:
strlcat(string, sysfs_path, maxsize);
dbg("substitute sysfs_path '%s'", sysfs_path);
break;
case SUBST_ENV:
if (attr == NULL) {
dbg("missing attribute");
break;
}
pos = getenv(attr);
if (pos == NULL) {
dbg("env '%s' not available", attr);
break;
}
dbg("substitute env '%s=%s'", attr, pos);
strlcat(string, pos, maxsize);
break;
case SUBST_CONFIG:
if (attr == NULL) {
dbg("missing attribute");
break;
}
pair = value_find(space, attr);
if (pair == NULL)
break;
strlcat(string, pair->value, maxsize);
break;
default:
Perror(space, "unknown substitution type=%i", type);
break;
}
/* possibly truncate to format-char specified length */
if (len != -1) {
head[len] = '\0';
dbg("truncate to %i chars, subtitution string becomes '%s'", len, head);
}
strlcat(string, temp, maxsize);
}
/* unescape strings */
head = tail = string;
while (*head != '\0') {
if (*head == '\\') {
head++;
if (*head == '\0')
break;
switch (*head) {
case 'a': *tail++ = '\a'; break;
case 'b': *tail++ = '\b'; break;
case 'n': *tail++ = '\n'; break;
case 'r': *tail++ = '\r'; break;
case 't': *tail++ = '\t'; break;
case 'v': *tail++ = '\v'; break;
case '\\': *tail++ = '\\'; break;
default: *tail++ = *head; break;
}
head++;
continue;
}
if (*head)
*tail++ = *head++;
}
*tail = 0;
}
static
int run_program1(struct space *space,
const char *command0, char *result,
size_t ressize, size_t *reslen, int log)
{
if (strncmp(command0, "__ctl_search", 12) == 0) {
const char *res = elemid_get(space, "do_search");
if (res == NULL || strcmp(res, "1") != 0)
return EXIT_FAILURE;
return EXIT_SUCCESS;
}
if (strncmp(command0, "__ctl_count", 11) == 0) {
const char *res = elemid_get(space, "do_count");
if (res == NULL || strcmp(res, "0") == 0)
return EXIT_FAILURE;
strlcpy(result, res, ressize);
return EXIT_SUCCESS;
}
Perror(space, "unknown buildin command '%s'", command0);
return EXIT_FAILURE;
}
static int parse(struct space *space, const char *filename);
static char *new_root_dir(const char *filename)
{
char *res, *tmp;
res = strdup(filename);
if (res) {
tmp = strrchr(res, '/');
if (tmp)
*tmp = '\0';
}
dbg("new_root_dir '%s' '%s'", filename, res);
return res;
}
/* return non-zero if the file name has the extension ".conf" */
static int conf_name_filter(const struct dirent *d)
{
char *ext = strrchr(d->d_name, '.');
return ext && !strcmp(ext, ".conf");
}
static int parse_line(struct space *space, char *line, size_t linesize)
{
char *linepos;
char *key, *value, *attr, *temp;
struct pair *pair;
enum key_op op;
int err = 0, count;
char string[PATH_SIZE];
char result[PATH_SIZE];
linepos = line;
while (*linepos != '\0') {
op = KEY_OP_UNSET;
err = get_key(&linepos, &key, &op, &value);
if (err < 0)
goto invalid;
if (strncasecmp(key, "LABEL", 5) == 0) {
if (op != KEY_OP_ASSIGN) {
Perror(space, "invalid LABEL operation");
goto invalid;
}
if (space->go_to && strcmp(space->go_to, value) == 0) {
free(space->go_to);
space->go_to = NULL;
}
continue;
}
if (space->go_to) {
dbg("skip (GOTO '%s')", space->go_to);
break; /* not for us */
}
if (strncasecmp(key, "CTL{", 4) == 0) {
attr = get_key_attribute(space, key + 3, string, sizeof(string));
if (attr == NULL) {
Perror(space, "error parsing CTL attribute");
goto invalid;
}
if (op == KEY_OP_ASSIGN) {
strlcpy(result, value, sizeof(result));
apply_format(space, result, sizeof(result));
dbg("ctl assign: '%s' '%s'", value, attr);
err = elemid_set(space, attr, result);
if (space->program_result) {
free(space->program_result);
space->program_result = NULL;
}
snprintf(string, sizeof(string), "%i", err);
space->program_result = strdup(string);
err = 0;
if (space->program_result == NULL)
break;
} else if (op == KEY_OP_MATCH || op == KEY_OP_NOMATCH) {
if (strncmp(attr, "write", 5) == 0) {
strlcpy(result, value, sizeof(result));
apply_format(space, result, sizeof(result));
dbg("ctl write: '%s' '%s'", value, attr);
err = elemid_set(space, "values", result);
if (err == 0 && op == KEY_OP_NOMATCH)
break;
if (err != 0 && op == KEY_OP_MATCH)
break;
} else {
temp = (char *)elemid_get(space, attr);
dbg("ctl match: '%s' '%s' '%s'", attr, value, temp);
if (!do_match(key, op, value, temp))
break;
}
} else {
Perror(space, "invalid CTL{} operation");
goto invalid;
}
continue;
}
if (strcasecmp(key, "RESULT") == 0) {
if (op == KEY_OP_MATCH || op == KEY_OP_NOMATCH) {
if (!do_match(key, op, value, space->program_result))
break;
} else if (op == KEY_OP_ASSIGN) {
if (space->program_result) {
free(space->program_result);
space->program_result = NULL;
}
strlcpy(string, value, sizeof(string));
apply_format(space, string, sizeof(string));
space->program_result = strdup(string);
if (space->program_result == NULL)
break;
} else {
Perror(space, "invalid RESULT operation");
goto invalid;
}
continue;
}
if (strcasecmp(key, "PROGRAM") == 0) {
if (op == KEY_OP_UNSET)
continue;
strlcpy(string, value, sizeof(string));
apply_format(space, string, sizeof(string));
if (space->program_result) {
free(space->program_result);
space->program_result = NULL;
}
if (run_program(space, string, result, sizeof(result), NULL, space->log_run) != 0) {
dbg("PROGRAM '%s' is false", string);
if (op != KEY_OP_NOMATCH)
break;
} else {
remove_trailing_chars(result, '\n');
count = replace_untrusted_chars(result);
if (count)
info("%i untrusted character(s) replaced", count);
dbg("PROGRAM '%s' result is '%s'", string, result);
space->program_result = strdup(result);
if (space->program_result == NULL)
break;
dbg("PROGRAM returned successful");
if (op == KEY_OP_NOMATCH)
break;
}
dbg("PROGRAM key is true");
continue;
}
if (strncasecmp(key, "CARDINFO{", 9) == 0) {
attr = get_key_attribute(space, key + 8, string, sizeof(string));
if (attr == NULL) {
Perror(space, "error parsing CARDINFO attribute");
goto invalid;
}
if (op == KEY_OP_MATCH || op == KEY_OP_NOMATCH) {
dbg("cardinfo: '%s' '%s'", value, attr);
temp = (char *)cardinfo_get(space, attr);
if (!do_match(key, op, value, temp))
break;
} else {
Perror(space, "invalid CARDINFO{} operation");
goto invalid;
}
continue;
}
if (strncasecmp(key, "ATTR{", 5) == 0) {
attr = get_key_attribute(space, key + 4, string, sizeof(string));
if (attr == NULL) {
Perror(space, "error parsing ATTR attribute");
goto invalid;
}
if (op == KEY_OP_MATCH || op == KEY_OP_NOMATCH) {
pair = value_find(space, "sysfs_device");
if (pair == NULL)
break;
dbg("sysfs_attr: '%s' '%s'", pair->value, attr);
temp = sysfs_attr_get_value(pair->value, attr);
if (!do_match(key, op, value, temp))
break;
} else {
Perror(space, "invalid ATTR{} operation");
goto invalid;
}
continue;
}
if (strncasecmp(key, "ENV{", 4) == 0) {
attr = get_key_attribute(space, key + 3, string, sizeof(string));
if (attr == NULL) {
Perror(space, "error parsing ENV attribute");
goto invalid;
}
if (op == KEY_OP_MATCH || op == KEY_OP_NOMATCH) {
temp = getenv(attr);
dbg("env: '%s' '%s'", attr, temp);
if (!do_match(key, op, value, temp))
break;
} else if (op == KEY_OP_ASSIGN ||
op == KEY_OP_ASSIGN_FINAL) {
strlcpy(result, value, sizeof(result));
apply_format(space, result, sizeof(result));
dbg("env set: '%s' '%s'", attr, result);
if (setenv(attr, result, op == KEY_OP_ASSIGN_FINAL))
break;
} else {
Perror(space, "invalid ENV{} operation");
goto invalid;
}
continue;
}
if (strcasecmp(key, "GOTO") == 0) {
if (op != KEY_OP_ASSIGN) {
Perror(space, "invalid GOTO operation");
goto invalid;
}
space->go_to = strdup(value);
if (space->go_to == NULL) {
err = -ENOMEM;
break;
}
continue;
}
if (strcasecmp(key, "INCLUDE") == 0) {
char *rootdir, *go_to;
const char *filename;
struct stat st;
int linenum;
if (op != KEY_OP_ASSIGN) {
Perror(space, "invalid INCLUDE operation");
goto invalid;
}
if (value[0] == '/')
strlcpy(string, value, sizeof(string));
else {
strlcpy(string, space->rootdir, sizeof(string));
strlcat(string, "/", sizeof(string));
strlcat(string, value, sizeof(string));
}
rootdir = space->rootdir;
go_to = space->go_to;
filename = space->filename;
linenum = space->linenum;
if (stat(string, &st)) {
Perror(space, "invalid filename '%s'", string);
continue;
}
if (S_ISDIR(st.st_mode)) {
struct dirent **list;
int i, num;
num = scandir(string, &list, conf_name_filter,
alphasort);
if (num < 0) {
Perror(space, "invalid directory '%s'", string);
continue;
}
count = strlen(string);
for (i = 0; i < num; i++) {
string[count] = '\0';
strlcat(string, "/", sizeof(string));
strlcat(string, list[i]->d_name, sizeof(string));
space->go_to = NULL;
space->rootdir = new_root_dir(string);
free(list[i]);
if (space->rootdir) {
err = parse(space, string);
free(space->rootdir);
} else
err = -ENOMEM;
if (space->go_to) {
Perror(space, "unterminated GOTO '%s'", space->go_to);
free(space->go_to);
}
if (err)
break;
}
free(list);
} else {
space->go_to = NULL;
space->rootdir = new_root_dir(string);
if (space->rootdir) {
err = parse(space, string);
free(space->rootdir);
} else
err = -ENOMEM;
if (space->go_to) {
Perror(space, "unterminated GOTO '%s'", space->go_to);
free(space->go_to);
}
}
space->go_to = go_to;
space->rootdir = rootdir;
space->filename = filename;
space->linenum = linenum;
if (space->quit)
break;
if (err)
break;
continue;
}
if (strncasecmp(key, "ACCESS", 6) == 0) {
if (op == KEY_OP_MATCH || op == KEY_OP_NOMATCH) {
if (value[0] == '$') {
strlcpy(string, value, sizeof(string));
apply_format(space, string, sizeof(string));
if (string[0] == '/')
goto __access1;
}
if (value[0] != '/') {
strlcpy(string, space->rootdir, sizeof(string));
strlcat(string, "/", sizeof(string));
strlcat(string, value, sizeof(string));
} else {
strlcpy(string, value, sizeof(string));
}
apply_format(space, string, sizeof(string));
__access1:
count = access(string, F_OK);
dbg("access(%s) = %i (%s)", string, count, value);
if (op == KEY_OP_MATCH && count != 0)
break;
if (op == KEY_OP_NOMATCH && count == 0)
break;
} else {
Perror(space, "invalid ACCESS operation");
goto invalid;
}
continue;
}
if (strncasecmp(key, "PRINT", 5) == 0) {
if (op != KEY_OP_ASSIGN) {
Perror(space, "invalid PRINT operation");
goto invalid;
}
strlcpy(string, value, sizeof(string));
apply_format(space, string, sizeof(string));
fwrite(string, strlen(string), 1, stdout);
continue;
}
if (strncasecmp(key, "ERROR", 5) == 0) {
if (op != KEY_OP_ASSIGN) {
Perror(space, "invalid ERROR operation");
goto invalid;
}
strlcpy(string, value, sizeof(string));
apply_format(space, string, sizeof(string));
fwrite(string, strlen(string), 1, stderr);
continue;
}
if (strncasecmp(key, "EXIT", 4) == 0) {
if (op != KEY_OP_ASSIGN) {
Perror(space, "invalid EXIT operation");
goto invalid;
}
strlcpy(string, value, sizeof(string));
apply_format(space, string, sizeof(string));
if (strcmp(string, "return") == 0)
return -EJUSTRETURN;
space->exit_code = strtol(string, NULL, 0);
space->quit = 1;
break;
}
if (strncasecmp(key, "CONFIG{", 7) == 0) {
attr = get_key_attribute(space, key + 6, string, sizeof(string));
if (attr == NULL) {
Perror(space, "error parsing CONFIG attribute");
goto invalid;
}
strlcpy(result, value, sizeof(result));
apply_format(space, result, sizeof(result));
if (op == KEY_OP_ASSIGN) {
err = value_set(space, attr, result);
dbg("CONFIG{%s}='%s'", attr, result);
break;
} else if (op == KEY_OP_MATCH || op == KEY_OP_NOMATCH) {
pair = value_find(space, attr);
if (pair == NULL)
break;
if (!do_match(key, op, result, pair->value))
break;
} else {
Perror(space, "invalid CONFIG{} operation");
goto invalid;
}
}
Perror(space, "unknown key '%s'", key);
}
return err;
invalid:
Perror(space, "invalid rule");
return -EINVAL;
}
static int parse(struct space *space, const char *filename)
{
char *buf, *bufline, *line;
size_t bufsize, pos, count, linesize;
unsigned int linenum, i, j, linenum_adj;
int err;
dbg("start of file '%s'", filename);
if (file_map(filename, &buf, &bufsize) != 0) {
err = errno;
error("Unable to open file '%s': %s", filename, strerror(err));
return -err;
}
err = 0;
pos = 0;
linenum = 0;
linesize = 128;
line = malloc(linesize);
if (line == NULL) {
file_unmap(buf, bufsize);
return -ENOMEM;
}
space->filename = filename;
while (!err && pos < bufsize && !space->quit) {
count = line_width(buf, bufsize, pos);
bufline = buf + pos;
pos += count + 1;
linenum++;
/* skip whitespaces */
while (count > 0 && isspace(bufline[0])) {
bufline++;
count--;
}
if (count == 0)
continue;
/* comment check */
if (bufline[0] == '#')
continue;
if (count > linesize - 1) {
free(line);
line = NULL;
linesize = (count + 127 + 1) & ~127;
if (linesize > 2048) {
error("file %s, line %i too long", filename, linenum);
err = -EINVAL;
break;
}
line = malloc(linesize);
if (line == NULL) {
err = -EINVAL;
break;
}
}
/* skip backslash and newline from multiline rules */
linenum_adj = 0;
for (i = j = 0; i < count; i++) {
if (bufline[i] == '\\' && bufline[i+1] == '\n') {
linenum_adj++;
continue;
}
line[j++] = bufline[i];
}
line[j] = '\0';
dbg("read (%i) '%s'", linenum, line);
space->linenum = linenum;
err = parse_line(space, line, linesize);
if (err == -EJUSTRETURN) {
err = 0;
break;
}
linenum += linenum_adj;
}
free(line);
space->filename = NULL;
space->linenum = -1;
file_unmap(buf, bufsize);
dbg("end of file '%s'", filename);
return err ? err : -abs(space->exit_code);
}
int init(const char *cfgdir, const char *filename, int flags, const char *cardname)
{
struct space *space;
struct snd_card_iterator iter;
int err = 0, lasterr = 0;
sysfs_init();
err = snd_card_iterator_sinit(&iter, cardname);
if (err < 0)
goto out;
while (snd_card_iterator_next(&iter)) {
err = snd_card_clean_cfgdir(cfgdir, iter.card);
if (err < 0) {
if (lasterr == 0)
lasterr = err;
continue;
}
err = init_ucm(flags, iter.card);
if (err == 0)
continue;
err = init_space(&space, iter.card);
if (err != 0)
continue;
space->rootdir = new_root_dir(filename);
if (space->rootdir != NULL) {
err = parse(space, filename);
if (!cardname && err <= -99) { /* non-fatal errors */
if (lasterr == 0)
lasterr = err;
err = 0;
}
}
free_space(space);
if (err < 0)
goto out;
}
err = lasterr ? lasterr : snd_card_iterator_error(&iter);
out:
sysfs_cleanup();
return err;
}
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