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/* acpi.c - show power state
*
* Written by Isaac Dunham, 2013
*
* No standard.
USE_ACPI(NEWTOY(acpi, "abctV", TOYFLAG_USR|TOYFLAG_BIN))
config ACPI
bool "acpi"
default y
help
usage: acpi [-abctV]
Show status of power sources and thermal devices.
-a show power adapters
-b show batteries
-c show cooling device state
-t show temperatures
-V show everything
*/
#define FOR_acpi
#include "toys.h"
GLOBALS(
int ac, bat, therm, cool;
char *cpath;
)
int read_int_at(int dirfd, char *name)
{
int fd, ret=0;
FILE *fil;
if ((fd = openat(dirfd, name, O_RDONLY)) < 0) return -1;
if (!fscanf(fil = xfdopen(fd, "r"), "%d", &ret)) perror_exit("%s", name);
fclose(fil);
return ret;
}
static int acpi_callback(struct dirtree *tree)
{
int dfd, fd, len, on;
errno = 0;
if (tree->name[0]=='.') return 0;
if (!tree->parent)
return DIRTREE_RECURSE|DIRTREE_SYMFOLLOW;
if (0 <= (dfd = open((TT.cpath=dirtree_path(tree, NULL)), O_RDONLY))) {
if ((fd = openat(dfd, "type", O_RDONLY)) < 0) goto done;
len = readall(fd, toybuf, sizeof(toybuf));
close(fd);
if (len < 1) goto done;
if (!strncmp(toybuf, "Battery", 7)) {
if ((toys.optflags & FLAG_b) || (!toys.optflags)) {
int cap = 0, curr = 0, max = 0;
if ((cap = read_int_at(dfd, "capacity")) < 0) {
if ((max = read_int_at(dfd, "charge_full")) > 0)
curr = read_int_at(dfd, "charge_now");
else if ((max = read_int_at(dfd, "energy_full")) > 0)
curr = read_int_at(dfd, "energy_now");
if (max > 0 && curr >= 0) cap = 100 * curr / max;
}
if (cap >= 0) printf("Battery %d: %d%%\n", TT.bat++, cap);
}
} else if (toys.optflags & FLAG_a) {
if ((on = read_int_at(dfd, "online")) >= 0)
printf("Adapter %d: %s-line\n", TT.ac++, (on ? "on" : "off"));
}
done:
close(dfd);
}
free(TT.cpath);
return 0;
}
static int temp_callback(struct dirtree *tree)
{
int dfd, temp;
if (*tree->name=='.') return 0;
if (!tree->parent || !tree->parent->parent)
return DIRTREE_RECURSE|DIRTREE_SYMFOLLOW;
errno = 0;
if (0 <= (dfd = open((TT.cpath=dirtree_path(tree, NULL)), O_RDONLY))) {
if ((0 < (temp = read_int_at(dfd, "temp"))) || !errno) {
//some tempertures are in milli-C, some in deci-C
//reputedly some are in deci-K, but I have not seen them
if (((temp >= 1000) || (temp <= -1000)) && (temp%100 == 0)) temp /= 100;
printf("Thermal %d: %d.%d degrees C\n", TT.therm++, temp/10, temp%10);
}
close(dfd);
}
free(TT.cpath);
return 0;
}
static int cool_callback(struct dirtree *tree)
{
int dfd=5, cur, max;
errno = 0;
memset(toybuf, 0, sizeof(toybuf));
if (*tree->name == '.') return 0;
if (!tree->parent) return DIRTREE_RECURSE|DIRTREE_SYMFOLLOW;
if (0 <= (dfd = open((TT.cpath=dirtree_path(tree, &dfd)), O_RDONLY))) {
TT.cpath = strcat(TT.cpath, "/type");
if (readfile(TT.cpath, toybuf, 256) && !errno) {
toybuf[strlen(toybuf) -1] = 0;
cur=read_int_at(dfd, "cur_state");
max=read_int_at(dfd, "max_state");
if (errno)
printf("Cooling %d: %s no state information\n", TT.cool++, toybuf);
else printf("Cooling %d: %s %d of %d\n", TT.cool++, toybuf, cur, max);
}
close(dfd);
}
free(TT.cpath);
return 0;
}
void acpi_main(void)
{
if (toys.optflags & FLAG_V) toys.optflags = FLAG_a|FLAG_b|FLAG_c|FLAG_t;
if (!toys.optflags) toys.optflags = FLAG_b;
if (toys.optflags & (FLAG_a|FLAG_b))
dirtree_read("/sys/class/power_supply", acpi_callback);
if (toys.optflags & FLAG_t) dirtree_read("/sys/class", temp_callback);
if (toys.optflags & FLAG_c) dirtree_read("/sys/class/thermal", cool_callback);
}
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