1[This file of Tom Christiansen's has been edited to change makelib to h2ph 2and .h to .ph where appropriate--law.] 3 4This directory contains files to help you convert the *.ph files generated my 5h2ph out of the perl source directory into *.pl files with all the 6indirection of the subroutine calls removed. The .ph version will be more 7safely portable, because if something isn't defined on the new system, like 8&TIOCGETP, then you'll get a fatal run-time error on the system lacking that 9function. Using the .pl version means that the subsequent scripts will give 10you a 0 $TIOCGETP and God only knows what may then happen. Still, I like the 11.pl stuff because they're faster to load. 12 13FIrst, you need to run h2ph on things like sys/ioctl.h to get stuff 14into the perl library directory, often /usr/local/lib/perl. For example, 15 # h2ph sys/ioctl.h 16takes /usr/include/sys/ioctl.h as input and writes (without i/o redirection) 17the file /usr/local/lib/perl/sys/ioctl.ph, which looks like this 18 19 eval 'sub TIOCM_RTS {0004;}'; 20 eval 'sub TIOCM_ST {0010;}'; 21 eval 'sub TIOCM_SR {0020;}'; 22 eval 'sub TIOCM_CTS {0040;}'; 23 eval 'sub TIOCM_CAR {0100;}'; 24 25and much worse, rather than what Larry's ioctl.pl from the perl source dir has, 26which is: 27 28 $TIOCM_RTS = 0004; 29 $TIOCM_ST = 0010; 30 $TIOCM_SR = 0020; 31 $TIOCM_CTS = 0040; 32 $TIOCM_CAR = 0100; 33 34[Workaround for fixed bug in makedir/h2ph deleted--law.] 35 36The more complicated ioctl subs look like this: 37 38 eval 'sub TIOCGSIZE {&TIOCGWINSZ;}'; 39 eval 'sub TIOCGWINSZ {&_IOR("t", 104, \'struct winsize\');}'; 40 eval 'sub TIOCSETD {&_IOW("t", 1, \'int\');}'; 41 eval 'sub TIOCGETP {&_IOR("t", 8,\'struct sgttyb\');}'; 42 43The _IO[RW] routines use a %sizeof array, which (presumably) 44is keyed on the type name with the value being the size in bytes. 45 46To build %sizeof, try running this in this directory: 47 48 % ./getioctlsizes 49 50Which will tell you which things the %sizeof array needs 51to hold. You can try to build a sizeof.ph file with: 52 53 % ./getioctlsizes | ./mksizes > sizeof.ph 54 55Note that mksizes hardcodes the #include files for all the types, so it will 56probably require customization. Once you have sizeof.ph, install it in the 57perl library directory. Run my tcbreak script to see whether you can do 58ioctls in perl now. You'll get some kind of fatal run-time error if you 59can't. That script should be included in this directory. 60 61If this works well, now you can try to convert the *.ph files into 62*.pl files. Try this: 63 64 foreach file ( sysexits.ph sys/{errno.ph,ioctl.ph} ) 65 ./mkvars $file > t/$file:r.pl 66 end 67 68The last one will be the hardest. If it works, should be able to 69run tcbreak2 and have it work the same as tcbreak. 70 71Good luck. 72