33 lines
663 B
C
33 lines
663 B
C
/* See LICENSE file for copyright and license details. */
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <machine/apmvar.h>
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#include "../../util.h"
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const char *
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battery_perc(const char *null)
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{
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struct apm_power_info apm_info;
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int fd;
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fd = open("/dev/apm", O_RDONLY);
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if (fd < 0) {
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fprintf(stderr, "open '/dev/apm': %s\n", strerror(errno));
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return NULL;
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}
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if (ioctl(fd, APM_IOC_GETPOWER, &apm_info) < 0) {
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fprintf(stderr, "ioctl 'APM_IOC_GETPOWER': %s\n", strerror(errno));
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close(fd);
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return NULL;
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}
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close(fd);
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return bprintf("%d", apm_info.battery_life);
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}
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