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688903eb | 1 | /* Copyright (C) 1991-2018 Free Software Foundation, Inc. |
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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 | |
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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. | |
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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 | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
478b92f0 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
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15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
28f540f4 | 17 | |
28f540f4 | 18 | #include <errno.h> |
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19 | #include <unistd.h> |
20 | ||
21 | /* Schedule an alarm. In SECONDS seconds, the process will get a SIGALRM. | |
22 | If SECONDS is zero, any currently scheduled alarm will be cancelled. | |
23 | The function returns the number of seconds remaining until the last | |
24 | alarm scheduled would have signaled, or zero if there wasn't one. | |
25 | There is no return value to indicate an error, but you can set `errno' | |
26 | to 0 and check its value after calling `alarm', and this might tell you. | |
27 | The signal may come late due to processor scheduling. */ | |
28 | unsigned int | |
9d46370c | 29 | alarm (unsigned int seconds) |
28f540f4 | 30 | { |
c4029823 | 31 | __set_errno (ENOSYS); |
b6ab06ce | 32 | return 0; |
28f540f4 | 33 | } |
b6ab06ce | 34 | libc_hidden_def (alarm) |
28f540f4 | 35 | |
b6ab06ce | 36 | stub_warning (alarm) |