common.c

   1 /*
   2  *      The PCI Utilities -- Common Functions
   3  *
   4  *      Copyright (c) 1997--2008 Martin Mares <mj@ucw.cz>
   5  *
   6  *      Can be freely distributed and used under the terms of the GNU GPL.
   7  */
   8
   9 #include <stdio.h>
  10 #include <string.h>
  11 #include <stdlib.h>
  12 #include <stdarg.h>
  13 #include <unistd.h>
  14
  15 #include "pciutils.h"
  16
  17 void NONRET
  18 die(char *msg, ...)
  19 {
  20   va_list args;
  21
  22   va_start(args, msg);
  23   fprintf(stderr, "%s: ", program_name);
  24   vfprintf(stderr, msg, args);
  25   fputc('\n', stderr);
  26   exit(1);
  27 }
  28
  29 void *
  30 xmalloc(unsigned int howmuch)
  31 {
  32   void *p = malloc(howmuch);
  33   if (!p)
  34     die("Unable to allocate %d bytes of memory", howmuch);
  35   return p;
  36 }
  37
  38 void *
  39 xrealloc(void *ptr, unsigned int howmuch)
  40 {
  41   void *p = realloc(ptr, howmuch);
  42   if (!p)
  43     die("Unable to allocate %d bytes of memory", howmuch);
  44   return p;
  45 }
  46
  47 static void
  48 set_pci_method(struct pci_access *pacc, char *arg)
  49 {
  50   char *name;
  51   int i;
  52
  53   if (!strcmp(arg, "help"))
  54     {
  55       printf("Known PCI access methods:\n\n");
  56       for (i=0; name = pci_get_method_name(i); i++)
  57         if (name[0])
  58           printf("%s\n", name);
  59       exit(0);
  60     }
  61   else
  62     {
  63       i = pci_lookup_method(arg);
  64       if (i < 0)
  65         die("No such PCI access method: %s (see `-A help' for a list)", arg);
  66       pacc->method = i;
  67     }
  68 }
  69
  70 static void
  71 set_pci_option(struct pci_access *pacc, char *arg)
  72 {
  73   if (!strcmp(arg, "help"))
  74     {
  75       struct pci_param *p;
  76       printf("Known PCI access parameters:\n\n");
  77       for (p=NULL; p=pci_walk_params(pacc, p);)
  78         printf("%-20s %s (%s)\n", p->param, p->help, p->value);
  79       exit(0);
  80     }
  81   else
  82     {
  83       char *sep = strchr(arg, '=');
  84       if (!sep)
  85         die("Invalid PCI access parameter syntax: %s", arg);
  86       *sep++ = 0;
  87       if (pci_set_param(pacc, arg, sep) < 0)
  88         die("Unrecognized PCI access parameter: %s (see `-O help' for a list)", arg);
  89     }
  90 }
  91
  92 int
  93 parse_generic_option(int i, struct pci_access *pacc, char *optarg)
  94 {
  95   switch (i)
  96     {
  97 #ifdef PCI_HAVE_PM_INTEL_CONF
  98     case 'H':
  99       if (!strcmp(optarg, "1"))
 100         pacc->method = PCI_ACCESS_I386_TYPE1;
 101       else if (!strcmp(optarg, "2"))
 102         pacc->method = PCI_ACCESS_I386_TYPE2;
 103       else
 104         die("Unknown hardware configuration type %s", optarg);
 105       break;
 106 #endif
 107 #ifdef PCI_HAVE_PM_DUMP
 108     case 'F':
 109       pci_set_param(pacc, "dump.name", optarg);
 110       pacc->method = PCI_ACCESS_DUMP;
 111       break;
 112 #endif
 113     case 'A':
 114       set_pci_method(pacc, optarg);
 115       break;
 116     case 'G':
 117       pacc->debugging++;
 118       break;
 119     case 'O':
 120       set_pci_option(pacc, optarg);
 121       break;
 122     default:
 123       return 0;
 124     }
 125   return 1;
 126 }