• implement fcntl(2)-based advisory locking as an alternative iff flock(2)
is not found, from a suggestion by RT (LP: #912691) • try harder (in a loop) to acquire a file lock if the locking mechanism documents EINTR is a possibility (fcntl always, flock on Linux not .Ox) • use -std=c99 not -std=gnu99 if it must be at all
This commit is contained in:
tg
parent
e3b9f14d88
commit
95a2c63096
47
Build.sh
47
Build.sh
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@ -1,5 +1,5 @@
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#!/bin/sh
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srcversion='$MirOS: src/bin/mksh/Build.sh,v 1.517 2012/03/27 21:23:50 tg Exp $'
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srcversion='$MirOS: src/bin/mksh/Build.sh,v 1.518 2012/03/27 22:36:48 tg Exp $'
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#-
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# Copyright (c) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
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# 2011, 2012
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@ -1335,7 +1335,7 @@ else
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#define EXTERN
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#define MKSH_INCLUDES_ONLY
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#include "sh.h"
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__RCSID("$MirOS: src/bin/mksh/Build.sh,v 1.517 2012/03/27 21:23:50 tg Exp $");
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__RCSID("$MirOS: src/bin/mksh/Build.sh,v 1.518 2012/03/27 22:36:48 tg Exp $");
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int main(void) { printf("Hello, World!\n"); return (0); }
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EOF
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case $cm in
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@ -1399,19 +1399,18 @@ EOF
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#
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# Environment: library functions
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#
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ac_testn flock_ex '' 'flock and mmap' <<-'EOF'
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#include <sys/types.h>
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#if HAVE_SYS_FILE_H
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#include <sys/file.h>
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#endif
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#if HAVE_SYS_MMAN_H
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#include <sys/mman.h>
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#endif
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ac_test flock <<-'EOF'
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#include <fcntl.h>
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#include <stdlib.h>
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int main(void) { return ((void *)mmap(NULL, (size_t)flock(0, LOCK_EX),
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PROT_READ, MAP_PRIVATE, 0, (off_t)0) == (void *)NULL ? 1 :
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munmap(NULL, 0)); }
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int main(void) { return (flock(0, LOCK_EX | LOCK_UN)); }
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EOF
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ac_test lock_fcntl '!' flock 1 'whether we can lock files with fcntl' <<-'EOF'
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#include <fcntl.h>
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int main(void) {
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struct flock lks;
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lks.l_type = F_WRLCK | F_UNLCK;
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return (fcntl(0, F_SETLKW, &lks));
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}
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EOF
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ac_test getrusage <<-'EOF'
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@ -1446,6 +1445,20 @@ ac_test mkstemp <<-'EOF'
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int main(void) { char tmpl[] = "X"; return (mkstemp(tmpl)); }
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EOF
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ac_test mmap lock_fcntl 0 'for mmap and munmap' <<-'EOF'
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#include <sys/types.h>
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#if HAVE_SYS_FILE_H
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#include <sys/file.h>
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#endif
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#if HAVE_SYS_MMAN_H
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#include <sys/mman.h>
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#endif
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#include <stdlib.h>
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int main(void) { return ((void *)mmap(NULL, (size_t)0,
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PROT_READ, MAP_PRIVATE, 0, (off_t)0) == (void *)NULL ? 1 :
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munmap(NULL, 0)); }
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EOF
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ac_test nice <<-'EOF'
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#include <unistd.h>
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int main(void) { return (nice(4)); }
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@ -1536,7 +1549,7 @@ EOF
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#
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save_CC=$CC; save_LDFLAGS=$LDFLAGS; save_LIBS=$LIBS
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CC="$CC -c -o $tcfn"; LDFLAGS=; LIBS=
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ac_test '!' flock_decl flock_ex 1 'if flock() does not need to be declared' <<-'EOF'
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ac_test '!' flock_decl flock 1 'if flock() does not need to be declared' <<-'EOF'
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#define MKSH_INCLUDES_ONLY
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#include "sh.h"
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long flock(void); /* this clashes if defined before */
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@ -1559,7 +1572,9 @@ CC=$save_CC; LDFLAGS=$save_LDFLAGS; LIBS=$save_LIBS
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# other checks
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#
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fd='if to use persistent history'
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ac_cache PERSISTENT_HISTORY || test 0 = $HAVE_FLOCK_EX || fv=1
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ac_cache PERSISTENT_HISTORY || case $HAVE_MMAP$HAVE_FLOCK$HAVE_LOCL_FCNTL in
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11*|101) fv=1 ;;
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esac
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test 1 = $fv || check_categories="$check_categories no-histfile"
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ac_testdone
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ac_cppflags
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10
Makefile
10
Makefile
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@ -1,6 +1,7 @@
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# $MirOS: src/bin/mksh/Makefile,v 1.94 2012/03/27 21:23:51 tg Exp $
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# $MirOS: src/bin/mksh/Makefile,v 1.95 2012/03/27 22:36:49 tg Exp $
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#-
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# Copyright (c) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
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# Copyright (c) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
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# 2011, 2012
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# Thorsten Glaser <tg@mirbsd.org>
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#
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# Provided that these terms and disclaimer and all copyright notices
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@ -39,7 +40,8 @@ CPPFLAGS+= -DMKSH_ASSUME_UTF8 -DMKSH_DISABLE_DEPRECATED \
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-DHAVE_CAN_INTTYPES=1 -DHAVE_CAN_UCBINTS=1 \
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-DHAVE_CAN_INT8TYPE=1 -DHAVE_CAN_UCBINT8=1 -DHAVE_RLIM_T=1 \
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-DHAVE_SIG_T=1 -DHAVE_SYS_SIGNAME=1 -DHAVE_SYS_SIGLIST=1 \
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-DHAVE_STRSIGNAL=0 -DHAVE_GETRUSAGE=1 -DHAVE_KILLPG=1 \
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-DHAVE_STRSIGNAL=0 -DHAVE_FLOCK=1 -DHAVE_LOCK_FCNTL=1 \
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-DHAVE_MMAP=1 -DHAVE_GETRUSAGE=1 -DHAVE_KILLPG=1 \
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-DHAVE_MKNOD=0 -DHAVE_MKSTEMP=1 -DHAVE_NICE=1 -DHAVE_REVOKE=1 \
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-DHAVE_SETLOCALE_CTYPE=0 -DHAVE_LANGINFO_CODESET=0 \
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-DHAVE_SELECT=1 -DHAVE_SETRESUGID=1 -DHAVE_SETGROUPS=1 \
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# probably differs between i386 and sparc
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CPPFLAGS+= -DHAVE_SILENT_IDIVWRAPV=0
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CPPFLAGS+= -D${${PROG:L}_tf:C/(Mir${MAN:E}{0,1}){2}/4/:S/x/mksh_BUILD/:U}
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COPTS+= -std=gnu99 -Wall
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COPTS+= -std=c99 -Wall
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.endif
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USE_PRINTF_BUILTIN?= 0
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4
check.t
4
check.t
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@ -1,4 +1,4 @@
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# $MirOS: src/bin/mksh/check.t,v 1.523 2012/03/26 21:10:38 tg Exp $
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# $MirOS: src/bin/mksh/check.t,v 1.524 2012/03/27 22:36:49 tg Exp $
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# $OpenBSD: bksl-nl.t,v 1.2 2001/01/28 23:04:56 niklas Exp $
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# $OpenBSD: history.t,v 1.5 2001/01/28 23:04:56 niklas Exp $
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# $OpenBSD: read.t,v 1.3 2003/03/10 03:48:16 david Exp $
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@ -29,7 +29,7 @@
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# http://www.freebsd.org/cgi/cvsweb.cgi/src/tools/regression/bin/test/regress.sh?rev=HEAD
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expected-stdout:
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@(#)MIRBSD KSH R40 2012/03/26
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@(#)MIRBSD KSH R40 2012/03/27
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description:
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Check version of shell.
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stdin:
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65
histrap.c
65
histrap.c
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@ -2,7 +2,8 @@
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/* $OpenBSD: trap.c,v 1.23 2010/05/19 17:36:08 jasper Exp $ */
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/*-
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* Copyright (c) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
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* Copyright (c) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
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* 2011, 2012
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* Thorsten Glaser <tg@mirbsd.org>
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*
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* Provided that these terms and disclaimer and all copyright notices
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@ -26,7 +27,7 @@
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#include <sys/file.h>
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#endif
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__RCSID("$MirOS: src/bin/mksh/histrap.c,v 1.117 2011/12/31 00:47:45 tg Exp $");
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__RCSID("$MirOS: src/bin/mksh/histrap.c,v 1.118 2012/03/27 22:36:52 tg Exp $");
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Trap sigtraps[NSIG + 1];
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static struct sigaction Sigact_ign;
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@ -723,7 +724,7 @@ hist_init(Source *s)
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if (histfd != fd)
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close(fd);
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(void)flock(histfd, LOCK_EX);
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mksh_lockfd(histfd);
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histfsize = lseek(histfd, (off_t)0, SEEK_END);
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if (histfsize > MKSH_MAXHISTFSIZE || hs == hist_init_restore) {
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@ -815,7 +816,7 @@ hist_init(Source *s)
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}
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histfsize = lseek(histfd, (off_t)0, SEEK_END);
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hist_init_tail:
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(void)flock(histfd, LOCK_UN);
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mksh_unlkfd(histfd);
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#endif
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}
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@ -880,7 +881,7 @@ writehistfile(int lno, const char *cmd)
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size_t bytes;
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unsigned char *base, *news;
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(void)flock(histfd, LOCK_EX);
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mksh_lockfd(histfd);
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sizenow = lseek(histfd, (off_t)0, SEEK_END);
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if (sizenow < histfsize) {
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/* the file has shrunk; give up */
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return;
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}
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histfsize = lseek(histfd, (off_t)0, SEEK_END);
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(void)flock(histfd, LOCK_UN);
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mksh_unlkfd(histfd);
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}
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static int
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void
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hist_finish(void)
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{
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(void)flock(histfd, LOCK_UN);
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mksh_unlkfd(histfd);
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(void)close(histfd);
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histfd = -1;
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}
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break;
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}
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}
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#if HAVE_PERSISTENT_HISTORY || defined(DF)
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/*
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* File descriptor locking and unlocking functions.
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* Could use some error handling, but hey, this is only
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* advisory locking anyway, will often not work over NFS,
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* and you are SOL if this fails...
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*/
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void
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mksh_lockfd(int fd)
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{
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#if defined(__OpenBSD__)
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/* flock is not interrupted by signals */
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(void)flock(fd, LOCK_EX);
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#elif HAVE_FLOCK
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int rv;
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/* e.g. on Linux */
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do {
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rv = flock(fd, LOCK_EX);
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} while (rv == 1 && errno == EINTR);
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#elif HAVE_LOCK_FCNTL
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int rv;
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struct flock lks;
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memset(&lks, 0, sizeof(lks));
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lks.l_type = F_WRLCK;
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do {
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rv = fcntl(fd, F_SETLKW, &lks);
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} while (rv == 1 && errno == EINTR);
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#else
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#error oops
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#endif
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}
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void
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mksh_unlkfd(int fd)
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{
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#if HAVE_FLOCK
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(void)flock(fd, LOCK_UN);
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#elif HAVE_LOCK_FCNTL
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struct flock lks;
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memset(&lks, 0, sizeof(lks));
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lks.l_type = F_UNLCK;
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(void)fcntl(fd, F_SETLKW, &lks);
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#endif
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}
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#endif
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6
main.c
6
main.c
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@ -34,7 +34,7 @@
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#include <locale.h>
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#endif
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__RCSID("$MirOS: src/bin/mksh/main.c,v 1.211 2012/03/25 14:28:14 tg Exp $");
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__RCSID("$MirOS: src/bin/mksh/main.c,v 1.212 2012/03/27 22:36:52 tg Exp $");
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extern char **environ;
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va_list args;
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struct timeval tv;
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(void)flock(shl_dbg_fd, LOCK_EX);
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mksh_lockfd(shl_dbg_fd);
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gettimeofday(&tv, NULL);
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shf_fprintf(shl_dbg, "[%d.%06d:%d] ", (int)tv.tv_sec, (int)tv.tv_usec,
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(int)getpid());
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va_end(args);
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shf_putc('\n', shl_dbg);
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shf_flush(shl_dbg);
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(void)flock(shl_dbg_fd, LOCK_UN);
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mksh_unlkfd(shl_dbg_fd);
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}
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#endif
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8
sh.h
8
sh.h
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@ -152,9 +152,9 @@
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#endif
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#ifdef EXTERN
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__RCSID("$MirOS: src/bin/mksh/sh.h,v 1.530 2012/03/27 21:23:52 tg Exp $");
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__RCSID("$MirOS: src/bin/mksh/sh.h,v 1.531 2012/03/27 22:36:53 tg Exp $");
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#endif
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#define MKSH_VERSION "R40 2012/03/26"
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#define MKSH_VERSION "R40 2012/03/27"
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/* arithmetic types: C implementation */
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#if !HAVE_CAN_INTTYPES
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@ -1663,6 +1663,10 @@ int block_pipe(void);
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void restore_pipe(int);
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int setsig(Trap *, sig_t, int);
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void setexecsig(Trap *, int);
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#if HAVE_FLOCK || HAVE_LOCK_FCNTL
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void mksh_lockfd(int);
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void mksh_unlkfd(int);
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#endif
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/* jobs.c */
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void j_init(void);
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void j_exit(void);
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Reference in New Issue