4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
26 static uint64_t clock_boottime(void)
31 err = clock_gettime(CLOCK_BOOTTIME, &ts);
34 return (ts.tv_sec * 100) + (ts.tv_nsec / 10000000);
37 static uint64_t proc_uptime(int fd)
43 /* save "p < end" checks */
44 memset(buf, 0, sizeof(buf));
45 rv = pread(fd, buf, sizeof(buf), 0);
46 assert(0 <= rv && rv <= sizeof(buf));
47 buf[sizeof(buf) - 1] = '\0';
51 val1 = xstrtoull(p, &p);
53 assert('0' <= p[1] && p[1] <= '9');
54 assert('0' <= p[2] && p[2] <= '9');
57 val2 = (p[1] - '0') * 10 + p[2] - '0';
59 return val1 * 100 + val2;