LXR busybox/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//config:config LSPCI
  10//config:       bool "lspci (6.3 kb)"
  11//config:       default y
  12//config:       #select PLATFORM_LINUX
  13//config:       help
  14//config:       lspci is a utility for displaying information about PCI buses in the
  15//config:       system and devices connected to them.
  16//config:
  17//config:       This version uses sysfs (/sys/bus/pci/devices) only.
  18
  19//applet:IF_LSPCI(APPLET_NOEXEC(lspci, lspci, BB_DIR_USR_BIN, BB_SUID_DROP, lspci))
  20
  21//kbuild:lib-$(CONFIG_LSPCI) += lspci.o
  22
  23//usage:#define lspci_trivial_usage
  24//usage:       "[-mk]"
  25//usage:#define lspci_full_usage "\n\n"
  26//usage:       "List all PCI devices"
  27//usage:     "\n"
  28//usage:     "\n        -m      Parsable output"
  29//usage:     "\n        -k      Show driver"
  30
  31#include "libbb.h"
  32
  33enum {
  34        OPT_m = (1 << 0),
  35        OPT_k = (1 << 1),
  36};
  37
  38/*
  39 * PCI_SLOT_NAME PCI_CLASS: PCI_VID:PCI_DID [PCI_SUBSYS_VID:PCI_SUBSYS_DID] [DRIVER]
  40 */
  41static int FAST_FUNC fileAction(
  42                const char *fileName,
  43                struct stat *statbuf UNUSED_PARAM,
  44                void *userData UNUSED_PARAM,
  45                int depth UNUSED_PARAM)
  46{
  47        parser_t *parser;
  48        char *tokens[3];
  49        char *pci_slot_name = NULL, *driver = NULL;
  50        int pci_class = 0, pci_vid = 0, pci_did = 0;
  51        int pci_subsys_vid = 0, pci_subsys_did = 0;
  52
  53        char *uevent_filename = concat_path_file(fileName, "/uevent");
  54        parser = config_open2(uevent_filename, fopen_for_read);
  55        free(uevent_filename);
  56
  57        while (config_read(parser, tokens, 3, 2, "\0:=", PARSE_NORMAL)) {
  58                if (strcmp(tokens[0], "DRIVER") == 0) {
  59                        driver = xstrdup(tokens[1]);
  60                        continue;
  61                }
  62
  63                if (strcmp(tokens[0], "PCI_CLASS") == 0) {
  64                        pci_class = xstrtou(tokens[1], 16)>>8;
  65                        continue;
  66                }
  67
  68                if (strcmp(tokens[0], "PCI_ID") == 0) {
  69                        pci_vid = xstrtou(tokens[1], 16);
  70                        pci_did = xstrtou(tokens[2], 16);
  71                        continue;
  72                }
  73
  74                if (strcmp(tokens[0], "PCI_SUBSYS_ID") == 0) {
  75                        pci_subsys_vid = xstrtou(tokens[1], 16);
  76                        pci_subsys_did = xstrtou(tokens[2], 16);
  77                        continue;
  78                }
  79
  80                if (strcmp(tokens[0], "PCI_SLOT_NAME") == 0) {
  81                        pci_slot_name = xstrdup(tokens[2]);
  82                        continue;
  83                }
  84        }
  85        config_close(parser);
  86
  87
  88        if (option_mask32 & OPT_m) {
  89                printf("%s \"Class %04x\" \"%04x\" \"%04x\" \"%04x\" \"%04x\"",
  90                        pci_slot_name, pci_class, pci_vid, pci_did,
  91                        pci_subsys_vid, pci_subsys_did);
  92        } else {
  93                printf("%s Class %04x: %04x:%04x",
  94                        pci_slot_name, pci_class, pci_vid, pci_did);
  95        }
  96
  97        if ((option_mask32 & OPT_k) && driver) {
  98                if (option_mask32 & OPT_m) {
  99                        printf(" \"%s\"", driver);
 100                } else {
 101                        printf(" %s", driver);
 102                }
 103        }
 104        bb_putchar('\n');
 105
 106        free(driver);
 107        free(pci_slot_name);
 108
 109        return TRUE;
 110}
 111
 112int lspci_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 113int lspci_main(int argc UNUSED_PARAM, char **argv)
 114{
 115        getopt32(argv, "m" /*non-compat:*/ "k" /*ignored:*/ "nv");
 116
 117        recursive_action("/sys/bus/pci/devices",
 118                        ACTION_RECURSE,
 119                        fileAction,
 120                        NULL, /* dirAction */
 121                        NULL, /* userData */
 122                        0 /* depth */);
 123
 124        return EXIT_SUCCESS;
 125}
 126