> At 09:15 PM 10/31/00 -0500, Andy Dougherty wrote:
> <Snipped>
> >I'll try to get around to handling the Configure end with at least a
> >dummy test in the next couple of days. Feel free to remind me if I
> >don't actually get around to it.
And here's the metaconfig unit. Suggestions to improve the test are
welcome. I just copied and pasted the one posted here earlier.
--
Andy Dougherty [EMAIL PROTECTED]
Dept. of Physics
Lafayette College, Easton PA 18042
?RCS: $Id: d_fcntl_can_lock.U,v$
?RCS:
?RCS: Copyright (c) 2000, Andrew Dougherty
?RCS:
?RCS: You may distribute under the terms of either the GNU General Public
?RCS: License or the Artistic License, as specified in the README file.
?RCS:
?RCS: $Log: d_fcntl_can_lock.U,v $
?RCS:
?MAKE:d_fcntl_can_lock: d_fcntl Compile Setvar cat rm
?MAKE: -pick add $@ %<
?S:d_fcntl_can_lock:
?S: This variable conditionally defines the FCNTL_CAN_LOCK symbol
?S: and indicates whether file locking with fcntl() works.
?S:.
?C:FCNTL_CAN_LOCK:
?C: This symbol, if defined, indicates that fcntl() can be used
?C: for file locking. Normally on Unix systems this is defined.
?C: It may be undefined on VMS.
?C:.
?H:#$d_fcntl_can_lock FCNTL_CAN_LOCK /**/
?H:.
?LINT: set d_fcntl_can_lock
?F: !try
?X: fcntl may not be fully functional. As of November 2000, on VMS and
?X: DOS/DJGPP, fctnl-based locking doesn't work.
?X: Thanks to Craig A. Berry <[EMAIL PROTECTED]> for this test.
echo " "
: See if fcntl-based locking works.
$cat >try.c <<'EOCP'
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
int main() {
#if defined(F_SETLK) && defined(F_SETLKW)
struct flock flock;
int retval, fd;
fd = open("try.c", O_RDONLY);
flock.l_type = F_RDLCK;
flock.l_whence = SEEK_SET;
flock.l_start = flock.l_len = 0;
retval = fcntl(fd, F_SETLK, &flock);
close(fd);
(retval < 0 ? exit(2) : exit(0));
#else
exit(2);
#endif
}
EOCP
echo "Checking if fcntl-based file locking works... "
case "$d_fcntl" in
"$define")
set try
if eval $compile_ok; then
if ./try; then
echo "Yes, it seems to work."
val="$define"
else
echo "Nope, it didn't work."
val="$undef"
fi
else
echo "I'm unable to compile the test program, so I'll assume not."
val="$undef"
fi
;;
*) val="$undef";
echo "Nope, since you don't even have fcntl()."
;;
esac
set d_fcntl_can_lock
eval $setvar
$rm -f try*
