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56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
/* Copyright (C) 1992-2024 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <stddef.h>
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#include <signal.h>
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#include <errno.h>
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#include <sigsetops.h>
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/* If INTERRUPT is nonzero, make signal SIG interrupt system calls
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(causing them to fail with EINTR); if INTERRUPT is zero, make system
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calls be restarted after signal SIG. */
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int
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siginterrupt (int sig, int interrupt)
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{
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#ifdef SA_RESTART
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extern sigset_t _sigintr attribute_hidden; /* Defined in signal.c. */
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struct sigaction action;
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if (__sigaction (sig, (struct sigaction *) NULL, &action) < 0)
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return -1;
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if (interrupt)
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{
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__sigaddset (&_sigintr, sig);
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action.sa_flags &= ~SA_RESTART;
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}
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else
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{
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__sigdelset (&_sigintr, sig);
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action.sa_flags |= SA_RESTART;
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}
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if (__sigaction (sig, &action, (struct sigaction *) NULL) < 0)
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return -1;
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return 0;
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#else
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__set_errno (ENOSYS);
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return -1;
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#endif
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}
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