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bff3019a LM |
1 | /* Test for select timeout. |
2 | Copyright (C) 2021 Free Software Foundation, Inc. | |
3 | This file is part of the GNU C Library. | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
17 | <https://www.gnu.org/licenses/>. */ | |
18 | ||
bff3019a | 19 | #include <errno.h> |
4c3df0eb | 20 | #include <intprops.h> |
1b53b5d9 | 21 | #include <support/capture_subprocess.h> |
bff3019a | 22 | #include <support/check.h> |
9d7c5cc3 | 23 | #include <support/support.h> |
bff3019a | 24 | #include <support/timespec.h> |
1b53b5d9 AZ |
25 | #include <support/xunistd.h> |
26 | #include <support/xtime.h> | |
cedbf6d5 | 27 | #include <support/xsignal.h> |
bff3019a | 28 | |
1b53b5d9 AZ |
29 | struct child_args |
30 | { | |
31 | int fds[2][2]; | |
32 | struct timeval tmo; | |
33 | }; | |
bff3019a | 34 | |
1b53b5d9 AZ |
35 | static void |
36 | do_test_child (void *clousure) | |
bff3019a | 37 | { |
1b53b5d9 | 38 | struct child_args *args = (struct child_args *) clousure; |
bff3019a | 39 | |
1b53b5d9 AZ |
40 | close (args->fds[0][1]); |
41 | close (args->fds[1][0]); | |
bff3019a | 42 | |
1b53b5d9 AZ |
43 | fd_set rfds; |
44 | FD_ZERO (&rfds); | |
45 | FD_SET (args->fds[0][0], &rfds); | |
bff3019a | 46 | |
1b53b5d9 AZ |
47 | struct timespec ts = xclock_now (CLOCK_REALTIME); |
48 | ts = timespec_add (ts, (struct timespec) { args->tmo.tv_sec, 0 }); | |
bff3019a | 49 | |
1b53b5d9 AZ |
50 | int r = select (args->fds[0][0] + 1, &rfds, NULL, NULL, &args->tmo); |
51 | TEST_COMPARE (r, 0); | |
bff3019a | 52 | |
9d7c5cc3 AZ |
53 | if (support_select_modifies_timeout ()) |
54 | { | |
55 | TEST_COMPARE (args->tmo.tv_sec, 0); | |
56 | TEST_COMPARE (args->tmo.tv_usec, 0); | |
57 | } | |
58 | ||
bff3019a LM |
59 | TEST_TIMESPEC_NOW_OR_AFTER (CLOCK_REALTIME, ts); |
60 | ||
1b53b5d9 | 61 | xwrite (args->fds[1][1], "foo", 3); |
bff3019a LM |
62 | } |
63 | ||
cedbf6d5 AZ |
64 | static void |
65 | do_test_child_alarm (void *clousure) | |
66 | { | |
4c3df0eb | 67 | struct child_args *args = (struct child_args *) clousure; |
cedbf6d5 | 68 | |
4c3df0eb AZ |
69 | support_create_timer (0, 100000000, false, NULL); |
70 | struct timeval tv = { .tv_sec = args->tmo.tv_sec, .tv_usec = 0 }; | |
cedbf6d5 AZ |
71 | int r = select (0, NULL, NULL, NULL, &tv); |
72 | TEST_COMPARE (r, -1); | |
4c3df0eb AZ |
73 | if (args->tmo.tv_sec > INT_MAX) |
74 | TEST_VERIFY (errno == EINTR || errno == EOVERFLOW); | |
75 | else | |
76 | { | |
77 | TEST_COMPARE (errno, EINTR); | |
78 | if (support_select_modifies_timeout ()) | |
79 | TEST_VERIFY (tv.tv_sec < args->tmo.tv_sec); | |
80 | } | |
cedbf6d5 AZ |
81 | } |
82 | ||
bff3019a LM |
83 | static int |
84 | do_test (void) | |
85 | { | |
1b53b5d9 AZ |
86 | struct child_args args; |
87 | ||
88 | xpipe (args.fds[0]); | |
89 | xpipe (args.fds[1]); | |
90 | ||
91 | /* The child select should timeout and write on its pipe end. */ | |
92 | args.tmo = (struct timeval) { .tv_sec = 0, .tv_usec = 250000 }; | |
93 | { | |
94 | struct support_capture_subprocess result; | |
95 | result = support_capture_subprocess (do_test_child, &args); | |
96 | support_capture_subprocess_check (&result, "tst-select-child", 0, | |
97 | sc_allow_none); | |
98 | } | |
99 | ||
9d7c5cc3 AZ |
100 | if (support_select_normalizes_timeout ()) |
101 | { | |
102 | /* This is handled as 1 second instead of failing with EINVAL. */ | |
103 | args.tmo = (struct timeval) { .tv_sec = 0, .tv_usec = 1000000 }; | |
104 | struct support_capture_subprocess result; | |
105 | result = support_capture_subprocess (do_test_child, &args); | |
106 | support_capture_subprocess_check (&result, "tst-select-child", 0, | |
107 | sc_allow_none); | |
108 | } | |
109 | ||
1b53b5d9 AZ |
110 | /* Same as before, but simulating polling. */ |
111 | args.tmo = (struct timeval) { .tv_sec = 0, .tv_usec = 0 }; | |
112 | { | |
113 | struct support_capture_subprocess result; | |
114 | result = support_capture_subprocess (do_test_child, &args); | |
115 | support_capture_subprocess_check (&result, "tst-select-child", 0, | |
116 | sc_allow_none); | |
117 | } | |
118 | ||
119 | xclose (args.fds[0][0]); | |
120 | xclose (args.fds[1][1]); | |
121 | ||
4c3df0eb AZ |
122 | args.tmo = (struct timeval) { .tv_sec = 10, .tv_usec = 0 }; |
123 | { | |
124 | struct support_capture_subprocess result; | |
125 | result = support_capture_subprocess (do_test_child_alarm, &args); | |
126 | support_capture_subprocess_check (&result, "tst-select-child", 0, | |
127 | sc_allow_none); | |
128 | } | |
129 | ||
130 | args.tmo = (struct timeval) { .tv_sec = TYPE_MAXIMUM (time_t), | |
131 | .tv_usec = 0 }; | |
cedbf6d5 AZ |
132 | { |
133 | struct support_capture_subprocess result; | |
4c3df0eb | 134 | result = support_capture_subprocess (do_test_child_alarm, &args); |
cedbf6d5 AZ |
135 | support_capture_subprocess_check (&result, "tst-select-child", 0, |
136 | sc_allow_none); | |
137 | } | |
138 | ||
4c3df0eb | 139 | args.tmo = (struct timeval) { .tv_sec = 0, .tv_usec = 0 }; |
1b53b5d9 AZ |
140 | { |
141 | fd_set rfds; | |
142 | FD_ZERO (&rfds); | |
143 | FD_SET (args.fds[1][0], &rfds); | |
144 | ||
145 | int r = select (args.fds[1][0] + 1, &rfds, NULL, NULL, &args.tmo); | |
146 | TEST_COMPARE (r, 1); | |
147 | } | |
bff3019a LM |
148 | |
149 | return 0; | |
150 | } | |
151 | ||
152 | #include <support/test-driver.c> |