common.c

   1 /*
   2  *      The PCI Utilities -- Common Functions
   3  *
   4  *      Copyright (c) 1997--2016 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
  14 #include "pciutils.h"
  15
  16 void NONRET
  17 die(char *msg, ...)
  18 {
  19   va_list args;
  20
  21   va_start(args, msg);
  22   fprintf(stderr, "%s: ", program_name);
  23   vfprintf(stderr, msg, args);
  24   fputc('\n', stderr);
  25   exit(1);
  26 }
  27
  28 void *
  29 xmalloc(size_t howmuch)
  30 {
  31   void *p = malloc(howmuch);
  32   if (!p)
  33     die("Unable to allocate %d bytes of memory", (int) howmuch);
  34   return p;
  35 }
  36
  37 void *
  38 xrealloc(void *ptr, size_t howmuch)
  39 {
  40   void *p = realloc(ptr, howmuch);
  41   if (!p)
  42     die("Unable to allocate %d bytes of memory", (int) howmuch);
  43   return p;
  44 }
  45
  46 char *
  47 xstrdup(const char *str)
  48 {
  49   int len = strlen(str) + 1;
  50   char *copy = xmalloc(len);
  51   memcpy(copy, str, len);
  52   return copy;
  53 }
  54
  55 static void
  56 set_pci_method(struct pci_access *pacc, char *arg)
  57 {
  58   char *name;
  59   int i;
  60
  61   if (!strcmp(arg, "help"))
  62     {
  63       printf("Known PCI access methods:\n\n");
  64       for (i=0; name = pci_get_method_name(i); i++)
  65         if (name[0])
  66           printf("%s\n", name);
  67       exit(0);
  68     }
  69   else
  70     {
  71       i = pci_lookup_method(arg);
  72       if (i < 0)
  73         die("No such PCI access method: %s (see `-A help' for a list)", arg);
  74       pacc->method = i;
  75     }
  76 }
  77
  78 static void
  79 set_pci_option(struct pci_access *pacc, char *arg)
  80 {
  81   if (!strcmp(arg, "help"))
  82     {
  83       struct pci_param *p;
  84       printf("Known PCI access parameters:\n\n");
  85       for (p=NULL; p=pci_walk_params(pacc, p);)
  86         printf("%-20s %s (%s)\n", p->param, p->help, p->value);
  87       exit(0);
  88     }
  89   else
  90     {
  91       char *sep = strchr(arg, '=');
  92       if (!sep)
  93         die("Invalid PCI access parameter syntax: %s", arg);
  94       *sep++ = 0;
  95       if (pci_set_param(pacc, arg, sep) < 0)
  96         die("Unrecognized PCI access parameter: %s (see `-O help' for a list)", arg);
  97     }
  98 }
  99
 100 int
 101 parse_generic_option(int i, struct pci_access *pacc, char *arg)
 102 {
 103   switch (i)
 104     {
 105 #ifdef PCI_HAVE_PM_INTEL_CONF
 106     case 'H':
 107       if (!strcmp(arg, "1"))
 108         pacc->method = PCI_ACCESS_I386_TYPE1;
 109       else if (!strcmp(arg, "2"))
 110         pacc->method = PCI_ACCESS_I386_TYPE2;
 111       else
 112         die("Unknown hardware configuration type %s", arg);
 113       break;
 114 #endif
 115 #ifdef PCI_HAVE_PM_DUMP
 116     case 'F':
 117       pci_set_param(pacc, "dump.name", arg);
 118       pacc->method = PCI_ACCESS_DUMP;
 119       break;
 120 #endif
 121     case 'A':
 122       set_pci_method(pacc, arg);
 123       break;
 124     case 'G':
 125       pacc->debugging++;
 126       break;
 127     case 'O':
 128       set_pci_option(pacc, arg);
 129       break;
 130     default:
 131       return 0;
 132     }
 133   return 1;
 134 }