PCI module info

static char rcsid[] = "$Id$";/* * Use the pciutils library to lookup a vendor id/device * * $Log$ */#include <stdio.h>#include <stdlib.h>#include <unistd.h>#include <string.h>#include <stdarg.h>#include <sys/types.h>#include <sys/stat.h>#include <pci/pci.h>    // From pciutils/lib#include <argp.h>#include <syslog.h>int verbose = 0;/* Communication with libpci */static struct pci_access *pacc;static struct pci_filter filter;const char *argp_program_version     = rcsid;const char *argp_program_bug_address = "<wynn@forums.gentoo.org>";/* Program documentation. */static char doc[] ="Use the pciutils library to lookup a vendor id/device";/* A description of the arguments we accept. */static char args_doc[] = "PCITABLE";     /* The options we understand. */static struct argp_option options[] = {  /* name,     key, arg,      flags, doc,                      group */  {"verbose",  'v', 0,        0,  "Produce verbose output", 0 },  {"pciids",   'i', "PCIIDS", 0,   "pci.ids file (default /usr/share/misc/pci.ids)", 0 },  { 0, 0, 0, 0, 0, 0 }};     /* Used by `main' to communicate with `parse_opt'. */struct arguments {  char *args[1];                /* PCITABLE */  char *pci_ids;  int verbose;};     /* Parse a single option. */static error_tparse_opt (int key, char *arg, struct argp_state *state){  /*   * Get the INPUT argument from `argp_parse', which we know is a   * pointer to our arguments structure.   */  struct arguments *arguments = state->input;       switch (key) {  case 'v':    arguments->verbose = 1;    break;  case 'i':    arguments->pci_ids = arg;    printf("Setting pci_ids to %s\n",arg);    break;  case ARGP_KEY_ARG:    if (state->arg_num >= 1)      /* Too many arguments. */      argp_usage(state);         arguments->args[state->arg_num] = arg;    printf("Setting pci table to %s\n",arg);         break;  case ARGP_KEY_END:    if (state->arg_num < 1) {      arguments->args[state->arg_num] = NULL;      fprintf(stderr, "The pci table must be given.\n");      argp_usage(state);    }    break;  default:    return ARGP_ERR_UNKNOWN;  }  return 0;}/* Our argp parser. */static struct argp argp = { /* options, parser, args_doc, doc, children, help_filter, argp_domain */    options, parse_opt, args_doc, doc, 0, 0, 0 };void die(char *msg, ...){  va_list args;  va_start(args, msg);  fputs("lspci: ", stderr);  vfprintf(stderr, msg, args);  fputc('\n', stderr);  exit(1);}static voidshow_info(u_short vendor_id, u_short device_id){  u_char classbuf[128], devbuf[128];  printf("%s\n",	 pci_lookup_name(pacc, devbuf, sizeof(devbuf),			 PCI_LOOKUP_VENDOR | PCI_LOOKUP_DEVICE,			 vendor_id, device_id));}static voidread_table(char *filename){  struct stat buf;  FILE *fp;  int begin = 0;  char *line = NULL;  size_t len = 0;  u_long id;  char *tail;  u_short vendor_id, device_id;  if (stat(filename, &buf)) {    printf("Can't stat %s: %m", filename);    return;  }  if ((fp = fopen(filename, "r")) == NULL) {    fprintf(stderr, "Can't open %s: %m", filename);    return;  }  while (1) {    ssize_t n = getline(&line, &len, fp);    if (n <= 0)      /* End of file or error.  */      break;    line[n - 1] = '\0';    if (strncmp(line, "static ", 7) == 0) break;  }  while (1) {    ssize_t n = getline(&line, &len, fp);    char *p, *q;    if (n <= 0)      /* End of file or error.  */      break;    line[n - 1] = '\0';    if (strstr(line, "{ 0 }") != NULL) break;    //    printf("read_table: line '%s'\n", line);    if ((p=strstr(line, "0x")) != NULL) {      id = strtoul(p, &tail, 0);      vendor_id = (u_short) id;      //      printf("read_table: id %04lx, p '%s', tail '%s'\n", id, p, tail);    } else {      fprintf(stderr, "Can't find vendor id in '%s'\n", line);    }    if ((q=strchr(p, ',')) != NULL) {      id = strtoul((q+1), &tail, 0);      device_id = (u_short) id;      //      printf("read_table: id %04lx, q '%s', tail '%s'\n", id, q, tail);    } else {      fprintf(stderr, "Can't find device id in '%s'\n", p);    }    show_info(vendor_id, device_id);  }  fclose(fp);}intmain (int argc, char **argv){  struct arguments arguments;  u_short vendor_id = 0x10b7, device_id = 0x1700;  /* Default values. */  arguments.verbose = 0;  arguments.pci_ids = "/usr/share/misc/pci.ids";  /*    * Parse our arguments; every option seen by `parse_opt' will be   * reflected in `arguments'.   */  argp_parse (&argp, argc, argv, 0, 0, &arguments);       printf("PCITABLE = %s\nVERBOSE = %s\nPCI IDS = %s\n",	  arguments.args[0]?arguments.args[0]:"NONE",	  arguments.verbose ? "yes" : "no",	  arguments.pci_ids?arguments.pci_ids:"NONE"	 );  if (arguments.args[0] == NULL) return(1);  pacc = pci_alloc();  pacc->error = die;  pci_filter_init(pacc, &filter);  pci_init(pacc);  read_table(arguments.args[0]);  pci_cleanup(pacc);  return(0);}/*Local Variables:compile-command: "gcc -O2 -g pci-lookup.c -o pci-lookup -lpci"End:*/