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/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*/
/*
* Copyright 2019, Joyent, Inc.
*/
/*
* Create /devices links for various sensors. The sensor series of node types
* all begin with ddi_sensor. After which, there is a series of : delineated
* paths in the node type. Those represent the directory under /dev/sensors that
* the nodes should ultimately be created.
*
* For example, ddi_sensor:temperature:cpu would cause us to place the named
* minor under /dev/sensors/temperature/cpu/. Currently it is up to drivers to
* not conflict in names or if there is a fear of conflicting, make sure their
* minor is unique.
*/
#include <devfsadm.h>
#include <string.h>
#define SENSORS_BASE "sensors"
static int
sensor_link(di_minor_t minor, di_node_t node)
{
const char *t, *minor_name, *dir_path = NULL;
char *type, *c;
char buf[PATH_MAX];
size_t len;
if ((t = di_minor_nodetype(minor)) == NULL) {
return (DEVFSADM_CONTINUE);
}
if ((minor_name = di_minor_name(minor)) == NULL) {
return (DEVFSADM_CONTINUE);
}
if ((type = strdup(t)) == NULL) {
return (DEVFSADM_TERMINATE);
}
while ((c = strchr(type, ':')) != NULL) {
if (dir_path == NULL) {
dir_path = c + 1;
}
*c = '/';
}
if (dir_path == NULL || *dir_path == '\0') {
len = snprintf(buf, sizeof (buf), "%s/%s", SENSORS_BASE,
minor_name);
} else {
len = snprintf(buf, sizeof (buf), "%s/%s/%s", SENSORS_BASE,
dir_path, minor_name);
}
if (len < sizeof (buf)) {
(void) devfsadm_mklink(buf, node, minor, 0);
}
free(type);
return (DEVFSADM_CONTINUE);
}
static devfsadm_create_t sensor_create_cbt[] = {
{ NULL, "ddi_sensor", NULL, TYPE_PARTIAL, ILEVEL_0, sensor_link }
};
DEVFSADM_CREATE_INIT_V0(sensor_create_cbt);
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