FreeCalypso > hg > fc-usbser-tools
changeset 10:fd3fcba5a8ac
libuwrap: implement locating by bus/dev
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Thu, 07 Sep 2023 04:18:30 +0000 |
parents | ab506f6aa57c |
children | fe4231326fb2 |
files | libuwrap/Makefile libuwrap/find_busdev.c |
diffstat | 2 files changed, 42 insertions(+), 1 deletions(-) [+] |
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--- 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}
--- /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 <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <strings.h> +#include <usb.h> +#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; +}