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8dad5ece49
making the SIGINT handler (the terminate() function) safe to execute at
any interruption moment. This fixes a race in
5807f35c54 where SIGINT delivered right
after the check_terminate() but before a blocking syscall would not
cause abort.
Do it by setting the in_io flag around potentially blocking io syscalls.
If handler sees the flag, it terminates the program. Otherwise,
termination is delegated to the before_io/after_io fences.
Reviewed by: Andrew Gierth <andrew@tao146.riddles.org.uk>
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D40281
74 lines
2.7 KiB
C
74 lines
2.7 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1991, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Keith Muller of the University of California, San Diego and Lance
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* Visser of Convex Computer Corporation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)extern.h 8.3 (Berkeley) 4/2/94
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* $FreeBSD$
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*/
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void block(void);
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void block_close(void);
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void dd_out(int);
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void def(void);
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void def_close(void);
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void jcl(char **);
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void pos_in(void);
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void pos_out(void);
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double secs_elapsed(void);
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void progress(void);
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void summary(void);
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void sigalarm_handler(int);
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void siginfo_handler(int);
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void prepare_io(void);
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void before_io(void);
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void after_io(void);
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void unblock(void);
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void unblock_close(void);
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extern IO in, out;
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extern STAT st;
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extern void (*cfunc)(void);
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extern uintmax_t cpy_cnt;
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extern size_t cbsz;
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extern uint64_t ddflags;
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extern size_t speed;
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extern uintmax_t files_cnt;
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extern const u_char *ctab;
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extern const u_char a2e_32V[], a2e_POSIX[];
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extern const u_char e2a_32V[], e2a_POSIX[];
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extern const u_char a2ibm_32V[], a2ibm_POSIX[];
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extern u_char casetab[];
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extern char fill_char;
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extern volatile sig_atomic_t need_summary;
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extern volatile sig_atomic_t need_progress;
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extern volatile sig_atomic_t kill_signal;
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