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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;
- )
- static 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_raw(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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