diff options
| -rw-r--r-- | components/battery.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/components/battery.c b/components/battery.c index 04dfa47..327d576 100644 --- a/components/battery.c +++ b/components/battery.c @@ -88,4 +88,41 @@ return bprintf("%d", apm_info.battery_life); } + + const char * + battery_state(const char *bat) + { + int fd; + size_t i; + struct apm_power_info apm_info; + struct { + unsigned int state; + char *symbol; + } map[] = { + { APM_AC_ON, "+" }, + { APM_AC_OFF, "-" }, + { APM_AC_UNKNOWN, "/" }, + }; + + fd = open("/dev/apm", O_RDONLY); + if (fd < 0) { + fprintf(stderr, "open '/dev/apm': %s\n", strerror(errno)); + return NULL; + } + + if (ioctl(fd, APM_IOC_GETPOWER, &apm_info) < 0) { + fprintf(stderr, "ioctl 'APM_IOC_GETPOWER': %s\n", + strerror(errno)); + close(fd); + return NULL; + } + close(fd); + + for (i = 0; i < LEN(map); i++) { + if (map[i].state == apm_info.ac_state) { + break; + } + } + return (i == LEN(map)) ? "?" : map[i].symbol; + } #endif |