diff options
| -rw-r--r-- | sys-utils/rtcwake.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/sys-utils/rtcwake.c b/sys-utils/rtcwake.c index 5dbacb247..842ea509c 100644 --- a/sys-utils/rtcwake.c +++ b/sys-utils/rtcwake.c @@ -242,19 +242,24 @@ static int setup_alarm(struct rtcwake_control *ctl, int fd, time_t *wakeup) static char **get_sys_power_states(struct rtcwake_control *ctl) { + int fd = -1; + if (!ctl->possible_modes) { - int fd; char buf[256] = { 0 }; - if (!(fd = open(SYS_POWER_STATE_PATH, O_RDONLY))) - return NULL; - if (read(fd, &buf, sizeof buf) < 0) { - close(fd); - return NULL; - } + fd = open(SYS_POWER_STATE_PATH, O_RDONLY); + if (fd < 0) + goto nothing; + if (read(fd, &buf, sizeof buf) <= 0) + goto nothing; ctl->possible_modes = strv_split(buf, " \n"); + close(fd); } return ctl->possible_modes; +nothing: + if (fd >= 0) + close(fd); + return NULL; } static void suspend_system(struct rtcwake_control *ctl) |