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- /* See LICENSE file for copyright and license details. */
- #include <errno.h>
- #include <stdio.h>
- #include <string.h>
- #include <sys/ioctl.h>
- #include <fcntl.h>
- #include <unistd.h>
- #include <machine/apmvar.h>
-
- #include "../../util.h"
-
- const char *
- battery_perc(const char *null)
- {
- struct apm_power_info apm_info;
- int fd;
-
- 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);
-
- return bprintf("%d", apm_info.battery_life);
- }
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