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Libusb 0.1 Error Codes

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You can access this info through pkg-config e.g.: pkg-config --variable=emulated libusbcommit 49057f6ce5cd4d51e31594f290b2dd3c9f1dbaf8Author: Daniel Drake Date: Mon May 19 15:21:04 2008 +0100 Pretend to be libusb-0.1.12 Pointed out by Ludovic Rousseau: some Does someone know what this value means? You signed out in another tab or window. Patches accepted to bring us closer to the behaviour of libusb-0.1 on Linux. 6. http://globalinfoindex.com/error-codes/libusb-interrupt-transfer-error-codes.php

Additionally, this patch makes sure that errno is always being set as some callers of libusb-0.1 expect that to be the case. Also my call to perror gives "the same message. Steps for the same are provided at http://hplipopensource.com/hplip-web/install/install/index.html Can you help with this problem? Adv Reply August 7th, 2008 #7 Zugzwang View Profile View Forum Posts Private Message Ubuntu Cappuccino Scuro Join Date Oct 2007 Beans 1,914 DistroLubuntu 12.10 Quantal Quetzal Re: help with

Libusb Error Codes

By default, logging is set to NONE, which means that no output will be produced. The libusb homepage includes a list of real-life project examples which use libusb. Donate to FreeBSD . in the logs, I see that usb_release_interface always returns -9.

vBulletin ©2000 - 2016, Jelsoft Enterprises Ltd. I now get back a -2 error (No such file or directory). I feel that Iím missing the obvious somewhere Ė canít see the wood for the trees. Libusb_set_debug Under standard configuration, libusb doesn't really log much at all, so you are advised to use this function to enable all error/warning/informational messages.

Movie about a man who becomes a genius because of a brain tumor? Libusb Control Transfer Full information can be found in the USB 3.0 Specification which is available for free download. Where do I find detailed descriptions of what the parameters mean Ė Iíve tried the libusb developers guide (http://libusb.sourceforge.net/doc/fu...ldrivernp.html), but it seems sadly lacking in detail. 4. this Debug message logging libusb does not log any messages by default.

Adv Reply August 7th, 2008 #6 nickbarnes View Profile View Forum Posts Private Message First Cup of Ubuntu Join Date Aug 2008 Location worcs Beans 10 DistroUbuntu 8.04 Hardy Heron Libusb_control_transfer Example User contributions on this site are licensed under the Creative Commons Attribution Share Alike 4.0 International License. Many thanks, Nick int print_device(struct usb_device *dev, int level) { usb_dev_handle *udev; char description[256]; char string[256]; int ret, i; udev = usb_open(dev); if (udev) { if (dev->descriptor.iManufacturer) { ret = usb_get_string_simple(udev, libusb_set_debug() and the LIBUSB_DEBUG environment variable have no effects.

Libusb Control Transfer

Some example programs can be found in the libusb source distribution under the "examples" subdirectory. https://www.freebsd.org/cgi/man.cgi?format=html&query=libusb(3) With libusb-1.0 or libusb-compat-0.1 backed by libusb-1.0, forcefully killing threads in this way is likely to cause all libusb I/O to halt. Libusb Error Codes However, unless the library has been compiled with logging disabled, then any application calls to libusb_set_debug(), or the setting of the environmental variable LIBUSB_DEBUG outside of the application, can result in Libusb Example Other remarks libusb does have imperfections.

Why doesn't my (battery-powered) light work in the cold? navigate here is there a means of doing an equivalent of a sudo, within the program? This raises the further question - what do I do about this lack of rights. It is probably just that //it wasn't attached in the first place int myret = usb_detach_kernel_driver_np(udev, 0); if(0 > (myret = usb_set_configuration(udev, 0))) perror("USB SET CONFIGURATION"); if(0 > (myret = usb_claim_interface(udev, Libusb Claim Interface

The caveats page attempts to document these. libusb-0.1 allowed you to open a device which you did not have permission to do anything useful with (all I/O requests would immediately fail). Debug message logging libusb uses stderr for all logging. Check This Out When the library is compiled in this way, all messages of all verbosities are always logged.

libusb homepage: http://libusb.org/ Use the mailing list for questions, comments, etc: https://sourceforge.net/mailarchive/forum.php?forum_name=libusb-devel - Peter Stuge (use the mailing list rather than mailing developers directly) Contact GitHub API Training Shop Blog Libusb Control Transfer Example Error codes returned on certain events may not exactly match the error codes returned by libusb-0.1. Looking in a table of Linux errors (eg http://aplawrence.com/Unixart/errors.html), I find that this is ENOENT 2 "No such file or directory".

Do you need this information in your software?

One decision you will have to make is whether to use the synchronous or the asynchronous data transfer interface. Nick Adv Reply August 5th, 2008 #3 Zugzwang View Profile View Forum Posts Private Message Ubuntu Cappuccino Scuro Join Date Oct 2007 Beans 1,914 DistroLubuntu 12.10 Quantal Quetzal Re: help I think that they should be -16 and -12 respectively Nick Last edited by nickbarnes; August 7th, 2008 at 02:08 PM. Libusb Pipe Error Look at the actual man page for the program that returned the error for information about what that error means.

In fact I started out using libusb because I thought that it would provide this for me. Did Pokemon start off as a Manga? Problem spotted by Xiaofan Chencommit 71225af5613d512b3a26ed94410f6d6ed2cebb30Author: Daniel Drake Date: Mon May 5 00:37:12 2008 +0100 fix timeout handling for bulk/interrupt IOcommit 2bb614e567d921a80224139b01742b718f8d420aAuthor: Daniel Drake Date: Sun May 4 17:29:15 2008 +0100 this contact form libusb can be compiled without any logging functions, useful for embedded systems.

They are not and will not be localized. The LIBUSB_DEBUG environment variable can be used to enable message logging at run-time. History Link existing bug Create bug report Link to a FAQ Create a new FAQ To post a message you must log in. Library features All transfer types supported (control/bulk/interrupt/isochronous) 2 transfer interfaces: Synchronous (simple) Asynchronous (more complicated, but more powerful) Thread safe (although the asynchronous interface means that you usually won't need to

Permalink Failed to load latest commit information. What's the verb for "to drink small amounts of drink"? The error codes it returns are system errno codes -- look in errno.h. 110 is ETIMEDOUT. 32 is EPIPE, usually meaning the pipe stalled. -- Tim Roberts, [email protected] Providenza & Boekelheide, Library features All transfer types supported (control/bulk/interrupt/isochronous) 2 transfer interfaces: Synchronous (simple) Asynchronous (more complicated, but more powerful) Thread safe (although the asynchronous interface means that you usually won't need to

Oh, wait... const char * libusb_error_name(int code) Gets the ASCII representation of the error enum given by the code argument. more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed This environment variable should be set to a number, which is interpreted the same as the libusb_set_debug() parameter.

What I'm saying is, there isn't really a standard for error numbers across all unix/linux programs. Error handling libusb functions typically return 0 on success or a negative error code on failure.