diff options
Diffstat (limited to 'usb.c')
| -rw-r--r-- | usb.c | 145 |
1 files changed, 145 insertions, 0 deletions
@@ -0,0 +1,145 @@ +#define _GNU_SOURCE +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include "libldetect.h" +#include "common.h" +#include "names.h" + +static char *proc_usb_path_default = "/proc/bus/usb/devices"; +char *proc_usb_path = NULL; + +static void build_text(struct pciusb_entry *e, char *vendor_text, char *product_text) { + if(e) { + if(!vendor_text) { + char const* vendorname; + vendorname = names_vendor(e->vendor); + if(vendorname) { + vendor_text = malloc(strlen(vendorname)+2); + sprintf(vendor_text, "%s|", vendorname); + } else + vendor_text = strdup("Unknown|"); + } + if(!product_text) { + char const* productname; + productname = names_product(e->vendor, e->device); + if(productname) { + product_text = strdup(productname); + } else + product_text = strdup("Unknown"); + } + vendor_text = realloc(vendor_text, strlen(vendor_text)+strlen(product_text)+1); + e->text = vendor_text; + strcat(e->text, product_text); + free(product_text); + } +} + + +extern struct pciusb_entries usb_probe(void) { + FILE *f; + char buf[BUF_SIZE]; + int line; + struct pciusb_entries r; + struct pciusb_entry *e = NULL; + char *vendor_text = NULL, *product_text = NULL; + r.nb = 0; + + names_init("/usr/share/usb.ids"); + if (!(f = fopen(proc_usb_path ? proc_usb_path : proc_usb_path_default, "r"))) { + if (proc_usb_path) { + char *err_msg; + asprintf(&err_msg, "unable to open \"%s\"\n" + "You may have passed a wrong argument to the \"-u\" option.\n" + "fopen() sets errno to", proc_usb_path); + perror(err_msg); + free(err_msg); + } + r.entries = NULL; + return r; + } + + r.entries = malloc(sizeof(struct pciusb_entry) * MAX_DEVICES); + /* for further information on the format parsed by this state machine, + * read /usr/share/doc/kernel-doc-X.Y.Z/usb/proc_usb_info.txt */ + for(line = 1; fgets(buf, sizeof(buf) - 1, f) && r.nb < MAX_DEVICES; line++) { + + switch (buf[0]) { + case 'T': { + unsigned short pci_bus, pci_device, usb_port; + build_text(e, vendor_text, product_text); + vendor_text = NULL; + product_text = NULL; + e = &r.entries[r.nb++]; + pciusb_initialize(e); + + if (sscanf(buf, "T: Bus=%02hd Lev=%*02d Prnt=%*04d Port=%02hd Cnt=%*02d Dev#=%3hd Spd=%*3s MxCh=%*2d", &pci_bus, &usb_port, &pci_device) == 3) { + e->pci_bus = pci_bus; + e->pci_device = pci_device; + e->usb_port = usb_port; + } else fprintf(stderr, "%s %d: unknown ``T'' line\n", proc_usb_path, line); + break; + } + case 'P': { + unsigned short vendor, device; + if (sscanf(buf, "P: Vendor=%hx ProdID=%hx", &vendor, &device) == 2) { + e->vendor = vendor; + e->device = device; + } else fprintf(stderr, "%s %d: unknown ``P'' line\n", proc_usb_path, line); + break; + } + case 'I': if (e->class_id == 0 || e->module == NULL) { + char driver[50]; + int class_id, sub, prot = 0; + if (sscanf(buf, "I:* If#=%*2d Alt=%*2d #EPs=%*2d Cls=%02x(%*5c) Sub=%02x Prot=%02x Driver=%s", &class_id, &sub, &prot, driver) >= 3) { + unsigned long cid = (class_id * 0x100 + sub) * 0x100 + prot; + if (e->class_id == 0) + e->class_id = cid; + if (strncmp(driver, "(none)", 6)) { + char *p; + /* Get current class if we are on the first one having used by a driver */ + e->class_id = cid; + e->module = strdup(driver); + /* replace '-' characters with '_' to be compliant with modnames from modaliases */ + p = e->module; + while (p && *p) { + if (*p == '-') *p = '_'; + p++; + } + } + /* see linux/sound/usb/usbaudio.c::usb_audio_ids */ + if (e->class_id == (0x1*0x100+ 0x01)) /* USB_AUDIO_CLASS*0x100 + USB_SUBCLASS_AUDIO_CONTROL*/ + e->module = strdup("snd_usb_audio"); + + } else if (sscanf(buf, "I: If#=%*2d Alt=%*2d #EPs=%*2d Cls=%02x(%*5c) Sub=%02x Prot=%02x Driver=%s", &class_id, &sub, &prot, driver) >= 3) { + /* Ignore interfaces not active */ + } else fprintf(stderr, "%s %d: unknown ``I'' line\n", proc_usb_path, line); + break; + } + case 'S': { + int offset; + char dummy; + size_t length = strlen(buf) -1; + if (sscanf(buf, "S: Manufacturer=%n%c", &offset, &dummy) == 1) { + buf[length] = '|'; /* replacing '\n' by '|' */ + vendor_text = strdup(buf + offset); + } else if (sscanf(buf, "S: Product=%n%c", &offset, &dummy) == 1) { + buf[length] = 0; /* removing '\n' */ + product_text = strdup(buf + offset); + } + } + } + } + + build_text(e, vendor_text, product_text); + + fclose(f); + + /* shrink to real size */ + r.entries = realloc(r.entries, sizeof(struct pciusb_entry) * r.nb); + + pciusb_find_modules(&r, "usbtable", DO_NOT_LOAD, 0); + return r; +} + |