util-linux/lspci.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * lspci implementation for busybox
   4  *
   5  * Copyright (C) 2009  Malek Degachi <malek-degachi@laposte.net>
   6  *
   7  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
   8  */
   9
  10 //usage:#define lspci_trivial_usage
  11 //usage:       "[-mk]"
  12 //usage:#define lspci_full_usage "\n\n"
  13 //usage:       "List all PCI devices"
  14 //usage:     "\n"
  15 //usage:     "\n        -m      Parsable output"
  16 //usage:     "\n        -k      Show driver"
  17
  18 #include "libbb.h"
  19
  20 enum {
  21         OPT_m = (1 << 0),
  22         OPT_k = (1 << 1),
  23 };
  24
  25 /*
  26  * PCI_SLOT_NAME PCI_CLASS: PCI_VID:PCI_DID [PCI_SUBSYS_VID:PCI_SUBSYS_DID] [DRIVER]
  27  */
  28 static int FAST_FUNC fileAction(
  29                 const char *fileName,
  30                 struct stat *statbuf UNUSED_PARAM,
  31                 void *userData UNUSED_PARAM,
  32                 int depth UNUSED_PARAM)
  33 {
  34         parser_t *parser;
  35         char *tokens[3];
  36         char *pci_slot_name = NULL, *driver = NULL;
  37         int pci_class = 0, pci_vid = 0, pci_did = 0;
  38         int pci_subsys_vid = 0, pci_subsys_did = 0;
  39
  40         char *uevent_filename = concat_path_file(fileName, "/uevent");
  41         parser = config_open2(uevent_filename, fopen_for_read);
  42         free(uevent_filename);
  43
  44         while (config_read(parser, tokens, 3, 2, "\0:=", PARSE_NORMAL)) {
  45                 if (strcmp(tokens[0], "DRIVER") == 0) {
  46                         driver = xstrdup(tokens[1]);
  47                         continue;
  48                 }
  49
  50                 if (strcmp(tokens[0], "PCI_CLASS") == 0) {
  51                         pci_class = xstrtou(tokens[1], 16)>>8;
  52                         continue;
  53                 }
  54
  55                 if (strcmp(tokens[0], "PCI_ID") == 0) {
  56                         pci_vid = xstrtou(tokens[1], 16);
  57                         pci_did = xstrtou(tokens[2], 16);
  58                         continue;
  59                 }
  60
  61                 if (strcmp(tokens[0], "PCI_SUBSYS_ID") == 0) {
  62                         pci_subsys_vid = xstrtou(tokens[1], 16);
  63                         pci_subsys_did = xstrtou(tokens[2], 16);
  64                         continue;
  65                 }
  66
  67                 if (strcmp(tokens[0], "PCI_SLOT_NAME") == 0) {
  68                         pci_slot_name = xstrdup(tokens[2]);
  69                         continue;
  70                 }
  71         }
  72         config_close(parser);
  73
  74
  75         if (option_mask32 & OPT_m) {
  76                 printf("%s \"Class %04x\" \"%04x\" \"%04x\" \"%04x\" \"%04x\"",
  77                         pci_slot_name, pci_class, pci_vid, pci_did,
  78                         pci_subsys_vid, pci_subsys_did);
  79         } else {
  80                 printf("%s Class %04x: %04x:%04x",
  81                         pci_slot_name, pci_class, pci_vid, pci_did);
  82         }
  83
  84         if ((option_mask32 & OPT_k) && driver) {
  85                 if (option_mask32 & OPT_m) {
  86                         printf(" \"%s\"", driver);
  87                 } else {
  88                         printf(" %s", driver);
  89                 }
  90         }
  91         bb_putchar('\n');
  92
  93         free(driver);
  94         free(pci_slot_name);
  95
  96         return TRUE;
  97 }
  98
  99 int lspci_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 100 int lspci_main(int argc UNUSED_PARAM, char **argv)
 101 {
 102         getopt32(argv, "m" /*non-compat:*/ "k" /*ignored:*/ "nv");
 103
 104         recursive_action("/sys/bus/pci/devices",
 105                         ACTION_RECURSE,
 106                         fileAction,
 107                         NULL, /* dirAction */
 108                         NULL, /* userData */
 109                         0 /* depth */);
 110
 111         return EXIT_SUCCESS;
 112 }