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Java Forum / General / February 2008java access to USB MAC OS X
I have a simple requirement at this point an Apple MAC OS X - that is to detect the presence or lack of a USB device from java. I have read about JSR 80, javax.usb, jUSB and all indicate not available in Mac OS X. I also know that in linux, I can do a "cat /proc/bus/usb/devices" and get a list of devices connected to the machine. Now Mac OS X is "linux" - yet there doesn't appear to be /proc/dev/... etc. Any suggestions on how to get the presence or lack of a USB device from java on Mac OS X?? In comp.sys.mac.programmer.help Gadgetman <stewart.gadget@gmail.com> wrote: > I have a simple requirement at this point an Apple MAC OS X - that is > to detect the presence or lack of a USB device from java. [quoted text clipped - 5 lines] > Now Mac OS X is "linux" - yet there doesn't appear to be /proc/dev/... > etc. No, Mac OS X is *not* "Linux". OS X is UNIX, Linux is a UNIX lookalike. (This is not meant to disparage Linux in any way, it's just the facts.) This is why OS X doesn't have /proc, it's a Linuxism. > Any suggestions on how to get the presence or lack of a USB device > from java on Mac OS X?? IOKit, but you'll have to use JNI to talk to it.  SignatureMichael Ash Rogue Amoeba Software In article <3d06056d-fa64-4aaa-ba89-4cfd49563a55@e26g2000hsh.googlegroups.com>, > I have a simple requirement at this point an Apple MAC OS X - that is > to detect the presence or lack of a USB device from java. [quoted text clipped - 8 lines] > Any suggestions on how to get the presence or lack of a USB device > from java on Mac OS X?? And where, exactly, did you hear that Mac OS X is "linux" again? Mac OS X is based on BSD. You'll also find that some of the other operating systems with a Un*x basis also don't use /proc. As I recall from my very earliest days with AT&T System V Unix, it didn't. I think the first one I encountered that did was Sun's Solaris. SignatureSteve W. Jackson Montgomery, Alabama > In article > <3d06056d-fa64-4aaa-ba89-4cfd49563a55@e26g2000hsh.googlegroups.com>, [quoted text clipped - 18 lines] > from my very earliest days with AT&T System V Unix, it didn't. I think > the first one I encountered that did was Sun's Solaris. I'm told that /proc is uniquely a Linux-ism. I certainly haven't noticed it on Solaris or any Unix SVR4 system. I think Linux borrowed the concept from Plan9, which was the first OS I heard of that implemented it (yes, even before OS-9's 1979 introduction the idea of naming all memory modules, hanging them off a linked list to act as an index and providing the mdir utility to show you what's in memory. Signaturemartin@ | Martin Gregorie gregorie. | Essex, UK org | >> In article >> <3d06056d-fa64-4aaa-ba89-4cfd49563a55@e26g2000hsh.googlegroups.com>, [quoted text clipped - 25 lines] > memory modules, hanging them off a linked list to act as an index and > providing the mdir utility to show you what's in memory. I don't know where /proc originated, but it certainly exists in Solaris. See http://docs.sun.com/app/docs/doc/817-5432/6mkt028lc?l=en&a=view, "Solaris 8 2/04 Reference Manual Collection >> man pages section 4: File Formats >> File Formats >> proc(4) – /proc, the process file system" Patricia > I don't know where /proc originated, but it certainly exists in Solaris. > See http://docs.sun.com/app/docs/doc/817-5432/6mkt028lc?l=en&a=view, Thanks for the correction - I was quoting somebody over on u.c.o.l. who usually seems to know what he is talking about. My experience with Solaris is small and its quite possible I've never looked at the contents of / Signaturemartin@ | Martin Gregorie gregorie. | Essex, UK org | > I have a simple requirement at this point an Apple MAC OS X - that is > to detect the presence or lack of a USB device from java. [quoted text clipped - 8 lines] > Any suggestions on how to get the presence or lack of a USB device > from java on Mac OS X?? try this http://www.serialio.com/support/jspCommAPI.php it gives serial via usb, which should allow a detection. But i have also seen a usb library available for osx, but not the crap listed above. Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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