1 /*
2 * This file and its contents are supplied under the terms of the
3 * Common Development and Distribution License ("CDDL"), version 1.0.
4 * You may only use this file in accordance with the terms of version
5 * 1.0 of the CDDL.
6 *
7 * A full copy of the text of the CDDL should have accompanied this
8 * source. A copy of the CDDL is also available via the Internet at
9 * http://www.illumos.org/license/CDDL.
10 */
11
12 /*
13 * Copyright (c) 2015, Joyent, Inc. All rights reserved.
14 */
15
16 #include <sys/timerfd.h>
17 #include <sys/stat.h>
18 #include <unistd.h>
19 #include <errno.h>
20 #include <fcntl.h>
21
22 int
timerfd_create(int clockid,int flags)23 timerfd_create(int clockid, int flags)
24 {
25 int oflags = O_RDWR;
26 int fd;
27
28 if (flags & ~(TFD_NONBLOCK | TFD_CLOEXEC)) {
29 errno = EINVAL;
30 return (-1);
31 }
32
33 if (flags & TFD_NONBLOCK)
34 oflags |= O_NONBLOCK;
35
36 if (flags & TFD_CLOEXEC)
37 oflags |= O_CLOEXEC;
38
39 if ((fd = open("/dev/timerfd", oflags)) < 0)
40 return (-1);
41
42 if (ioctl(fd, TIMERFDIOC_CREATE, clockid) != 0) {
43 (void) close(fd);
44 return (-1);
45 }
46
47 return (fd);
48 }
49
50 int
timerfd_settime(int fd,int flags,const struct itimerspec * new_value,struct itimerspec * old_value)51 timerfd_settime(int fd, int flags, const struct itimerspec *new_value,
52 struct itimerspec *old_value)
53 {
54 timerfd_settime_t st;
55 int rval;
56
57 if (flags & ~(TFD_TIMER_ABSTIME | TFD_TIMER_CANCEL_ON_SET)) {
58 errno = EINVAL;
59 return (-1);
60 }
61
62 st.tfd_settime_flags = flags;
63 st.tfd_settime_value = (uint64_t)(uintptr_t)new_value;
64 st.tfd_settime_ovalue = (uint64_t)(uintptr_t)old_value;
65
66 rval = ioctl(fd, TIMERFDIOC_SETTIME, &st);
67
68 if (rval == -1 && errno == ENOTTY) {
69 /*
70 * Linux has us return EINVAL when the file descriptor is valid
71 * but is not a timerfd file descriptor -- and LTP explicitly
72 * checks this case.
73 */
74 errno = EINVAL;
75 }
76
77 return (rval);
78 }
79
80 int
timerfd_gettime(int fd,struct itimerspec * curr_value)81 timerfd_gettime(int fd, struct itimerspec *curr_value)
82 {
83 int rval = ioctl(fd, TIMERFDIOC_GETTIME, curr_value);
84
85 if (rval == -1 && errno == ENOTTY) {
86 /*
87 * See comment in timerfd_settime(), above.
88 */
89 errno = EINVAL;
90 }
91
92 return (rval);
93 }
94