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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);
char *fname_gz = alloca(length + sizeof(".gz"));
sprintf(fname_gz, "%s.gz", fname);
if (access(fname, R_OK) == 0) {
ret.f = fopen(fname, "r");
ret.pid = 0;
} else if (access(fname_gz, R_OK) == 0) {
int fdno[2];
if (pipe(fdno)) { perror("pciusb"); exit(1); }
if ((ret.pid = fork()) != 0) {
ret.f = fdopen(fdno[0], "r");
close(fdno[1]);
} else {
char *cmd[8];
int ip = 0;
char *ld_loader = getenv("LD_LOADER");
if (ld_loader && *ld_loader) {
cmd[ip++] = ld_loader;
}
cmd[ip++] = "gzip";
cmd[ip++] = "-dc";
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);
}
} else {
fprintf(stderr, "Missing pciusbtable (should be %s)\n", fname);
exit(1);
}
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, int no_subid) {
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;
int offset, i;
int 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) {
if (buf[0] != '#') fprintf(stderr, "%s %d: bad line\n", fpciusbtable, line);
continue;
}
}
for (i = 0; i < entries.nb; i++) {
struct pciusb_entry *e = &entries.entries[i];
if (vendor == e->vendor && device == e->device) {
if (nb == 4 && e->subvendor == 0xffff && e->subdevice == 0xffff && !no_subid) {
pciusb_free(entries);
fh_close(f);
return 0; /* leave, let the caller call again with subids */
}
if ((nb != 4 || (subvendor == e->subvendor && subdevice == e->subdevice)) && !e->module) {
char *p = strdupa(buf + offset + 1);
char *q = strchr(p, '\t');
if (q) {
q[-1] = 0;
q[strlen(q)-2] = 0;
ifree(e->module); ifree(e->text);
e->module = strcmp(p, "unknown") ? strdup(p) : NULL;
e->text = strdup(q+2);
}
}
}
}
}
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;
}
extern void pciusb_free(struct pciusb_entries entries) {
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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