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Diffstat (limited to 'mcon/U/d_vfork.U')
| -rw-r--r-- | mcon/U/d_vfork.U | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/mcon/U/d_vfork.U b/mcon/U/d_vfork.U new file mode 100644 index 0000000..9bd7089 --- /dev/null +++ b/mcon/U/d_vfork.U @@ -0,0 +1,91 @@ +?RCS: $Id$ +?RCS: +?RCS: Copyright (c) 1991-1997, 2004-2006, Raphael Manfredi +?RCS: +?RCS: You may redistribute only under the terms of the Artistic Licence, +?RCS: as specified in the README file that comes with the distribution. +?RCS: You may reuse parts of this distribution only within the terms of +?RCS: that same Artistic Licence; a copy of which may be found at the root +?RCS: of the source tree for dist 4.0. +?RCS: +?RCS: $Log: d_vfork.U,v $ +?RCS: Revision 3.0.1.6 1994/08/29 16:18:21 ram +?RCS: patch32: set default to 'y' the first time +?RCS: +?RCS: Revision 3.0.1.5 1994/06/20 06:59:14 ram +?RCS: patch30: usevfork was not always properly set +?RCS: +?RCS: Revision 3.0.1.4 1994/05/13 15:20:56 ram +?RCS: patch27: modified to avoid spurious Whoa warnings (ADO) +?RCS: +?RCS: Revision 3.0.1.3 1994/05/06 14:59:09 ram +?RCS: patch23: now explicitely ask whether vfork() should be used (ADO) +?RCS: +?RCS: Revision 3.0.1.2 1993/10/16 13:49:39 ram +?RCS: patch12: added magic for vfork() +?RCS: +?RCS: Revision 3.0.1.1 1993/09/13 16:06:57 ram +?RCS: patch10: removed automatic remapping of vfork on fork (WAD) +?RCS: patch10: added compatibility code for older config.sh (WAD) +?RCS: +?RCS: Revision 3.0 1993/08/18 12:07:55 ram +?RCS: Baseline for dist 3.0 netwide release. +?RCS: +?MAKE:d_vfork usevfork: Inlibc Myread Oldconfig Setvar +?MAKE: -pick add $@ %< +?S:d_vfork: +?S: This variable conditionally defines the HAS_VFORK symbol, which +?S: indicates the vfork() routine is available. +?S:. +?S:usevfork: +?S: This variable is set to true when the user accepts to use vfork. +?S: It is set to false when no vfork is available or when the user +?S: explicitely requests not to use vfork. +?S:. +?C:HAS_VFORK (VFORK): +?C: This symbol, if defined, indicates that vfork() exists. +?C:. +?H:#$d_vfork HAS_VFORK /**/ +?H:. +?M:vfork: HAS_VFORK +?M:#ifndef HAS_VFORK +?M:#define vfork fork +?M:#endif +?M:. +?LINT:set d_vfork +: see if there is a vfork +val='' +set vfork val +eval $inlibc + +: Ok, but do we want to use it. vfork is reportedly unreliable in +: perl on Solaris 2.x, and probably elsewhere. +case "$val" in +$define) + echo " " + case "$usevfork" in + false) dflt='n';; + *) dflt='y';; + esac + rp="Some systems have problems with vfork(). Do you want to use it?" + . ./myread + case "$ans" in + y|Y) ;; + *) + echo "Ok, we won't use vfork()." + val="$undef" + ;; + esac + ;; +esac +?X: +?X: Only set it when final value is known to avoid spurious Whoas +?X: Then set usevfork accordingly to the current value, for next run +?X: +set d_vfork +eval $setvar +case "$d_vfork" in +$define) usevfork='true';; +*) usevfork='false';; +esac + |