История изменений

Исправление ttnl, 09.04.19 12:24 (текущая версия) :

#define BATTERY_FILE_NAME "/sys/class/power_supply/battery/online"

static int
battery_online () {
    int status = 0;
    char c;
    int fd;

    fd = open (BATTERY_FILE_NAME, O_RDONLY);
    if (fd < 0) {
        perrmsg ("open: " BATTERY_FILE_NAME);
        return -1;
    }

    if (read(fd, &c, 1) != 1) {
        perrmsg ("fail on read " BATTERY_FILE_NAME);
        c = -1;
    } else {
        c -= '0';
        if (c != 0 && c != 1)
           c = -1;
    }

    close(fd);

    return c;
}

Исправление ttnl, 09.04.19 12:23:

#define BATTERY_FILE_NAME "/sys/class/power_supply/battery/online"

static int
battery_online () {
    int status = 0;
    char c;
    int fd;

    fd = open (BATTERY_FILE_NAME, O_RDONLY);
    if (fd < 0) {
        perrmsg ("open: " BATTERY_FILE_NAME);
        return -1;
    }

    if (read(fd, &c, 1) != 1) {
        perrmsg ("fail on read " BATTERY_FILE_NAME);
        c = -1;
    } else {
        c -= '0';
    }

    close(fd);

    return c;
}

Исправление ttnl, 09.04.19 12:21:

#define BATTERY_FILE_NAME "/sys/class/power_supply/battery/online"

static int
battery_online () {
    int status = 0;
    char c;
    int fd;

    fd = open (BATTERY_FILE_NAME, O_RDONLY);
    if (fd < 0) {
        perrmsg ("open: " BATTERY_FILE_NAME);
        return -1;
    }

    if (read(fd, &c, 1) != 1) {
        perrmsg ("fail on read " BATTERY_FILE_NAME);
        return -1;
    }

    return (c == '1');
}

Исходная версия ttnl, 09.04.19 12:21:

#define BATTERY_FILE_NAME «/sys/class/power_supply/battery/online»

static int battery_online () { int status = 0; char c; int fd;

fd = open (BATTERY_FILE_NAME, O_RDONLY); if (fd < 0) { perrmsg («open: » BATTERY_FILE_NAME); return -1; }

if (read(fd, &c, 1) != 1) { perrmsg («fail on read » BATTERY_FILE_NAME); return -1; }

return (c == '1'); }