# HG changeset patch # User Mychaela Falconia # Date 1694060310 0 # Node ID fd3fcba5a8ac8957b00bff056c5e701da2620cf4 # Parent ab506f6aa57c619c7622f83d6aadd99df5375247 libuwrap: implement locating by bus/dev diff -r ab506f6aa57c -r fd3fcba5a8ac libuwrap/Makefile --- a/libuwrap/Makefile Thu Sep 07 04:00:56 2023 +0000 +++ b/libuwrap/Makefile Thu Sep 07 04:18:30 2023 +0000 @@ -1,6 +1,6 @@ CC= gcc CFLAGS= -O2 -OBJS= find_matchspec.o prelim_init.o +OBJS= find_busdev.o find_matchspec.o prelim_init.o LIB= libuwrap.a all: ${LIB} diff -r ab506f6aa57c -r fd3fcba5a8ac libuwrap/find_busdev.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/libuwrap/find_busdev.c Thu Sep 07 04:18:30 2023 +0000 @@ -0,0 +1,41 @@ +/* + * In this module we implement the function that locates a USB device + * by bus and device number/filename strings. + */ + +#include +#include +#include +#include +#include +#include "find_dev.h" +#include "prelim_init.h" + +struct usb_device * +find_usbdev_by_busdev(const char *bus_dev_spec) +{ + const char *slash; + unsigned bus_name_len; + struct usb_bus *bus; + struct usb_device *dev; + + slash = index(bus_dev_spec, '/'); + if (!slash) { + fprintf(stderr, + "error: bus/dev path expected, but no slash found\n"); + exit(1); + } + bus_name_len = slash - bus_dev_spec; + libusb_prelim_init(); + for (bus = usb_get_busses(); bus; bus = bus->next) { + if (strlen(bus->dirname) != bus_name_len) + continue; + if (strncmp(bus->dirname, bus_dev_spec, bus_name_len)) + continue; + for (dev = bus->devices; dev; dev = dev->next) { + if (!strcmp(dev->filename, slash + 1)) + return dev; + } + } + return 0; +}