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#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "libldetect.h"
#include "common.h"
static char *proc_usb_path_default = "/proc/bus/usb/devices";
char *proc_usb_path = NULL;
extern struct pciusb_entries usb_probe(void) {
FILE *f;
char buf[BUF_SIZE];
int line;
struct pciusb_entries r;
struct pciusb_entry *e = NULL;
r.nb = 0;
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;
e = &r.entries[r.nb++];
pciusb_initialize(e);
if (sscanf(buf, "T: Bus=%02hd Lev=%*02d Prnt=%*04d Port=%*02d Cnt=%*02d Dev#=%3hd Spd=%*3s MxCh=%*2d", &pci_bus, &pci_device) == 2) {
e->pci_bus = pci_bus;
e->pci_device = pci_device;
} 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) {
char driver[50];
int class_id, sub, prot = 0;
if (sscanf(buf, "I:%*1c If#=%*2d Alt=%*2d #EPs=%*2d Cls=%02x(%*5c) Sub=%02x Prot=%02x Driver=%s", &class_id, &sub, &prot, driver) == 4) {
e->class_id = (class_id * 0x100 + sub) * 0x100 + prot;
if (strncmp(driver, "(none)", 6))
e->module = strdup(driver);
/* 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:%*1c If#=%*2d Alt=%*2d #EPs=%*2d Cls=%02x(%*5c) Sub=%02x Prot=%02x Driver=", &class_id, &sub, &prot) == 3) {
/* prevent spurious warnings for strange USB interfaces */
} 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 '|' */
e->text = strdup(buf + offset);
} else if (sscanf(buf, "S: Product=%n%c", &offset, &dummy) == 1) {
if (!e->text)
e->text = strdup("Unknown|");
buf[length] = 0; /* removing '\n' */
e->text = realloc(e->text, strlen(e->text) + length-offset + 2);
strcat(e->text, buf + offset);
}
}
}
}
fclose(f);
realloc(r.entries, sizeof(struct pciusb_entry) * r.nb);
pciusb_find_modules(&r, "usbtable", LOAD, 0);
return r;
}
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