int read_sysfs_int(const char *sys_pfx, const char *node)
{
int fd, val;
fd = open_sysfs(sys_pfx, node, O_RDONLY);
val = read_sysfs_int_fd(fd, sys_pfx, node);
close(fd);
return val;
}
int read_sysfs_int(const char *sys_pfx, const char *postfix, const char *node)
{
extern int errno;
int fd, val;
fd = open_sysfs(sys_pfx, postfix, node, O_RDONLY);
val = read_sysfs_int_fd(fd, sys_pfx, postfix, node);
close(fd);
return val;
}
void write_sysfs_val(const char *sys_pfx, const char *node, int val)
{
int fd, len;
char buf[SYSFS_MAX_INT];
fd = open_sysfs(sys_pfx, node, O_RDWR);
len = snprintf(buf, sizeof(buf), "%d", val);
if (write(fd, buf, len) < 0) {
fprintf(stderr, "unable to write to %s%s %s\n", sys_pfx, node,
strerror(errno));
close(fd);
abort();
}
close(fd);
}