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#define _GNU_SOURCE
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "libldetect.h"
#include "libldetect-private.h"
#include "common.h"
typedef struct {
FILE *f;
pid_t pid;
} fh;
static fh fh_open(char *fname) {
fh ret;
int length = strlen(fname);
if (access(fname, R_OK) == 0) {
ret.f = fopen(fname, "r");
ret.pid = 0;
} else {
int fdno[2];
char *fname_gz = alloca(length + sizeof(".gz"));
sprintf(fname_gz, "%s.gz", fname);
if (access(fname_gz, R_OK) != 0) {
fprintf(stderr, "Missing pciusbtable (should be %s)\n", fname);
exit(1);
}
if (pipe(fdno)) {
perror("pciusb");
exit(1);
}
if ((ret.pid = fork()) != 0) {
ret.f = fdopen(fdno[0], "r");
close(fdno[1]);
} else {
char* cmd[5];
int ip = 0;
char *ld_loader = getenv("LD_LOADER");
if (ld_loader && *ld_loader)
cmd[ip++] = ld_loader;
cmd[ip++] = "gzip";
cmd[ip++] = "-cd";
cmd[ip++] = fname_gz;
cmd[ip++] = NULL;
dup2(fdno[1], STDOUT_FILENO);
close(fdno[0]);
close(fdno[1]);
execvp(cmd[0], cmd);
perror("pciusb");
exit(2);
}
}
return ret;
}
static void fh_close(fh *f) {
fclose(f->f);
if (f->pid > 0)
waitpid(f->pid, NULL, 0);
}
extern int pciusb_find_modules(struct pciusb_entries *entries, const char *fpciusbtable) {
fh f;
char buf[2048];
int line;
char *share_path = getenv("SHARE_PATH");
char *fname;
if (!share_path || !*share_path) share_path = "/usr/share";
fname = alloca(strlen(share_path) + sizeof("/ldetect-lst/") + strlen(fpciusbtable));
sprintf(fname, "%s/ldetect-lst/%s", share_path, fpciusbtable);
f = fh_open(fname);
for (line = 1; fgets(buf, sizeof(buf) - 1, f.f); line++) {
unsigned short vendor, device, subvendor, subdevice;
char *p = NULL, *q = NULL;
int offset; unsigned int i;
int nb;
if (buf[0]=='#')
continue; // skip comments
nb = sscanf(buf, "0x%hx\t0x%hx\t0x%hx\t0x%hx\t%n", &vendor, &device, &subvendor, &subdevice, &offset);
if (nb != 4) {
nb = sscanf(buf, "0x%hx\t0x%hx\t%n", &vendor, &device, &offset);
if (nb != 2) {
fprintf(stderr, "%s %d: bad line\n", fpciusbtable, line);
continue; // skip bad line
}
}
for (i = 0; i < entries->nb; i++) {
struct pciusb_entry *e = &entries->entries[i];
if (e->already_found)
continue; // skip since already found with sub ids
if (vendor != e->vendor || device != e->device)
continue; // main ids differ
if (nb == 4 && !(subvendor == e->subvendor && subdevice == e->subdevice))
continue; // subids differ
if (!p) { // only calc text & module if not already done
p = buf + offset + 1;
q = strchr(p, '\t');
}
if (strncmp(p, "unknown", q-p-1))
e->module = strndup(p,q-p-1);
/* special case for buggy 0x0 usb entry */
if (vendor != 0 && device != 0 && e->class_ != 0x90000d) { /* Hub class */
ifree(e->text); /* usb.c set it so that we display something when usbtable doesn't refer that hw*/
e->text = strndup(q+2, strlen(q)-4);
}
/* if subids read on pcitable line, we know that subids matches :
(see "subids differ" test above) */
if (nb == 4)
e->already_found = 1;
}
}
fh_close(&f);
return 1;
}
extern void pciusb_initialize(struct pciusb_entry *e) {
e->vendor = 0xffff;
e->device = 0xffff;
e->subvendor = 0xffff;
e->subdevice = 0xffff;
e->class_ = 0;
e->pci_bus = 0xffff;
e->pci_device = 0xffff;
e->pci_function = 0xffff;
e->module = NULL;
e->text = NULL;
e->already_found = 0;
}
extern void pciusb_free(struct pciusb_entries *entries) {
unsigned int i;
for (i = 0; i < entries->nb; i++) {
struct pciusb_entry *e = &entries->entries[i];
ifree(e->module);
ifree(e->text);
}
ifree(entries->entries);
}
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