mirror of
https://https.git.savannah.gnu.org/git/patch.git
synced 2026-01-27 01:44:34 +00:00
448ff9bc72
Refactor by using a sig_atomic_t variable instead of a sigprocmask call to defer signals. This should be good enough for a single-thread app where we write all the code that needs critical sections, and where the signal handler merely cleans up and exits. The resulting code should have the same behavior (including signal-handling races!) as the original. * bootstrap.conf (gnulib_modules): Remove sigaction, sigprocmask. Instead, use sigaction only if it’s supported natively, as the Gnulib emulation of sigaction drags in code we no longer need. * configure.ac: Check for sigaction, sigfillset. * src/patch.c (fatal_cleanup): New async-signal-safe function, which does the cleanup that the old fatal_exit (SIG) did when SIG was nonzero. (fatal_exit): Do what the old fatal_exit (SIG) did when SIG was zero. Omit SIG arg. All callers changed. This function is no longer called from signal handlers, and so no longer needs to be async-signal-safe under some circumstances. However, it now defers signals. * src/util.c (signal_received): New static var. (signal_deferring_level): Now sig_atomic_t. (fatal_cleanup_and_terminate, handle_signal): New functions. (defer_signals, undefer_signals): Reimplement by using sigatomic_t volatile vars, not by using sigprocmask. (init_signals): Don’t assume SIGPIPE since we don’t use the Gnulib sigpipe module. Use simple sigfillset signal mask so that we needn’t use sigprocmask to inquire about the current signal mask. Have a fallback for old platforms that lack sigaction and sigfillset, since we no longer use Gnulib’s sigaction module. (exit_with_signal): Remove; no longer needed.
109 lines
1.7 KiB
Bash
109 lines
1.7 KiB
Bash
# Bootstrap configuration. -*- sh -*-
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# Copyright 2006-2024 Free Software Foundation, Inc.
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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# This program 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
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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# gnulib modules used by this package.
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gnulib_modules="
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argmatch
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assert-h
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attribute
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backupfile
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basename-lgpl
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c-ctype
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clock-time
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closeout
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diffseq
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dup2
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errno
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exitfail
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extensions
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faccessat
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fchownat
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fchmodat
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fcntl-h
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filename
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fseeko
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fstatat
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ftello
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futimens
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getopt-gnu
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gettime
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gitlog-to-changelog
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git-version-gen
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gnupload
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hash
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idx
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ignore-value
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intprops
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inttypes
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largefile
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linked-list
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maintainer-makefile
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malloc-gnu
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manywarnings
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memchr
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mempcpy
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minmax
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mkdirat
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nstrftime
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nullptr
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openat
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parse-datetime
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progname
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quotearg
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raise
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readlinkat
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realloc-gnu
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renameat
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setenv
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signal-h
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ssize_t
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stat-time
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stdbool
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stdc_bit_ceil
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stdckdint
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stdlib
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stpcpy
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symlinkat
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sys_stat
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tempname
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time
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unistd
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unlinkat
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update-copyright
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utimensat
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verror
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xalloc
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xlist
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xstdopen
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year2038-recommended
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"
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# Build prerequisites
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buildreq="\
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autoconf 2.59
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automake 1.9.6
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git 1.5.5
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tar -
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"
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bootstrap_post_import_hook ()
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{
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# Automake requires that ChangeLog exist.
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touch ChangeLog || exit 1
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}
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