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77f49956 FW |
1 | /* Copyright (C) 2006-2018 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. | |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU Lesser General Public | |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
8 | ||
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
15 | License along with the GNU C Library; if not, see | |
16 | <http://www.gnu.org/licenses/>. */ | |
17 | ||
5c983cdd UD |
18 | #include <errno.h> |
19 | #include <signal.h> | |
20 | #include <stdio.h> | |
79be2199 | 21 | #include <unistd.h> |
5c983cdd UD |
22 | #include <sys/select.h> |
23 | #include <sys/wait.h> | |
ffaa74cf | 24 | #include <stdlib.h> |
5c983cdd UD |
25 | |
26 | ||
27 | static volatile int handler_called; | |
28 | ||
29 | static void | |
30 | handler (int sig) | |
31 | { | |
32 | handler_called = 1; | |
33 | } | |
34 | ||
35 | ||
36 | static int | |
37 | do_test (void) | |
38 | { | |
39 | struct sigaction sa; | |
40 | sa.sa_handler = handler; | |
41 | sa.sa_flags = 0; | |
42 | sigemptyset (&sa.sa_mask); | |
43 | ||
44 | if (sigaction (SIGUSR1, &sa, NULL) != 0) | |
45 | { | |
46 | puts ("sigaction failed"); | |
47 | return 1; | |
48 | } | |
49 | ||
36775704 | 50 | sa.sa_handler = SIG_IGN; |
36775704 UD |
51 | if (sigaction (SIGCHLD, &sa, NULL) != 0) |
52 | { | |
53 | puts ("2nd sigaction failed"); | |
54 | return 1; | |
55 | } | |
56 | ||
6b5189eb JM |
57 | sigset_t ss_usr1; |
58 | sigemptyset (&ss_usr1); | |
59 | sigaddset (&ss_usr1, SIGUSR1); | |
60 | if (sigprocmask (SIG_BLOCK, &ss_usr1, NULL) != 0) | |
5c983cdd | 61 | { |
6b5189eb | 62 | puts ("sigprocmask failed"); |
5c983cdd UD |
63 | return 1; |
64 | } | |
65 | ||
66 | int fds[2][2]; | |
67 | ||
68 | if (pipe (fds[0]) != 0 || pipe (fds[1]) != 0) | |
69 | { | |
70 | puts ("pipe failed"); | |
71 | return 1; | |
72 | } | |
73 | ||
74 | fd_set rfds; | |
75 | FD_ZERO (&rfds); | |
76 | ||
77 | sigset_t ss; | |
78 | sigprocmask (SIG_SETMASK, NULL, &ss); | |
79 | sigdelset (&ss, SIGUSR1); | |
80 | ||
81 | struct timespec to = { .tv_sec = 0, .tv_nsec = 500000000 }; | |
82 | ||
36775704 | 83 | pid_t parent = getpid (); |
5c983cdd UD |
84 | pid_t p = fork (); |
85 | if (p == 0) | |
86 | { | |
87 | close (fds[0][1]); | |
88 | close (fds[1][0]); | |
89 | ||
90 | FD_SET (fds[0][0], &rfds); | |
91 | ||
92 | int e; | |
93 | do | |
94 | { | |
36775704 UD |
95 | if (getppid () != parent) |
96 | exit (2); | |
97 | ||
5c983cdd UD |
98 | errno = 0; |
99 | e = pselect (fds[0][0] + 1, &rfds, NULL, NULL, &to, &ss); | |
100 | } | |
101 | while (e == 0); | |
102 | ||
103 | if (e != -1) | |
104 | { | |
105 | puts ("child: pselect did not fail"); | |
106 | return 0; | |
107 | } | |
108 | if (errno != EINTR) | |
109 | { | |
110 | puts ("child: pselect did not set errno to EINTR"); | |
111 | return 0; | |
112 | } | |
113 | ||
114 | TEMP_FAILURE_RETRY (write (fds[1][1], "foo", 3)); | |
115 | ||
116 | exit (0); | |
117 | } | |
118 | ||
119 | close (fds[0][0]); | |
120 | close (fds[1][1]); | |
121 | ||
122 | FD_SET (fds[1][0], &rfds); | |
123 | ||
124 | kill (p, SIGUSR1); | |
125 | ||
126 | int e = pselect (fds[1][0] + 1, &rfds, NULL, NULL, NULL, &ss); | |
127 | if (e == -1) | |
128 | { | |
129 | puts ("parent: pselect failed"); | |
130 | return 1; | |
131 | } | |
132 | if (e != 1) | |
133 | { | |
134 | puts ("parent: pselect did not report readable fd"); | |
135 | return 1; | |
136 | } | |
137 | if (!FD_ISSET (fds[1][0], &rfds)) | |
138 | { | |
139 | puts ("parent: pselect reports wrong fd"); | |
140 | return 1; | |
141 | } | |
142 | ||
5c983cdd UD |
143 | return 0; |
144 | } | |
145 | ||
146 | #define TEST_FUNCTION do_test () | |
147 | #include "../test-skeleton.c" |