common.c

   1 /*
   2  *      The PCI Utilities -- Common Functions
   3  *
   4  *      Copyright (c) 1997--2006 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_option(struct pci_access *pacc, char *arg)
  49 {
  50   if (!strcmp(arg, "help"))
  51     {
  52       struct pci_param *p;
  53       printf("Known PCI access parameters:\n\n");
  54       for (p=NULL; p=pci_walk_params(pacc, p);)
  55         printf("%-20s %s (%s)\n", p->param, p->help, p->value);
  56       exit(0);
  57     }
  58   else
  59     {
  60       char *sep = strchr(arg, '=');
  61       if (!sep)
  62         die("Invalid PCI access parameter syntax: %s", arg);
  63       *sep++ = 0;
  64       if (pci_set_param(pacc, arg, sep) < 0)
  65         die("Unrecognized PCI access parameter: %s", arg);
  66     }
  67 }
  68
  69 int
  70 parse_generic_option(int i, struct pci_access *pacc, char *optarg)
  71 {
  72   switch (i)
  73     {
  74 #ifdef PCI_HAVE_PM_LINUX_PROC
  75     case 'P':
  76       pacc->method_params[PCI_ACCESS_PROC_BUS_PCI] = optarg;
  77       pacc->method = PCI_ACCESS_PROC_BUS_PCI;
  78       break;
  79 #endif
  80 #ifdef PCI_HAVE_PM_INTEL_CONF
  81     case 'H':
  82       if (!strcmp(optarg, "1"))
  83         pacc->method = PCI_ACCESS_I386_TYPE1;
  84       else if (!strcmp(optarg, "2"))
  85         pacc->method = PCI_ACCESS_I386_TYPE2;
  86       else
  87         die("Unknown hardware configuration type %s", optarg);
  88       break;
  89 #endif
  90 #ifdef PCI_HAVE_PM_DUMP
  91     case 'F':
  92       pacc->method_params[PCI_ACCESS_DUMP] = optarg;
  93       pacc->method = PCI_ACCESS_DUMP;
  94       break;
  95 #endif
  96     case 'G':
  97       pacc->debugging++;
  98       break;
  99     case 'O':
 100       set_pci_option(pacc, optarg);
 101       break;
 102     default:
 103       return 0;
 104     }
 105   return 1;
 106 }