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 #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(size_t howmuch)
  31 {
  32   void *p = malloc(howmuch);
  33   if (!p)
  34     die("Unable to allocate %d bytes of memory", (int) howmuch);
  35   return p;
  36 }
  37
  38 void *
  39 xrealloc(void *ptr, size_t howmuch)
  40 {
  41   void *p = realloc(ptr, howmuch);
  42   if (!p)
  43     die("Unable to allocate %d bytes of memory", (int) howmuch);
  44   return p;
  45 }
  46
  47 char *
  48 xstrdup(const char *str)
  49 {
  50   int len = strlen(str) + 1;
  51   char *copy = xmalloc(len);
  52   memcpy(copy, str, len);
  53   return copy;
  54 }
  55
  56 static void
  57 set_pci_method(struct pci_access *pacc, char *arg)
  58 {
  59   char *name;
  60   int i;
  61
  62   if (!strcmp(arg, "help"))
  63     {
  64       printf("Known PCI access methods:\n\n");
  65       for (i=0; name = pci_get_method_name(i); i++)
  66         if (name[0])
  67           printf("%s\n", name);
  68       exit(0);
  69     }
  70   else
  71     {
  72       i = pci_lookup_method(arg);
  73       if (i < 0)
  74         die("No such PCI access method: %s (see `-A help' for a list)", arg);
  75       pacc->method = i;
  76     }
  77 }
  78
  79 static void
  80 set_pci_option(struct pci_access *pacc, char *arg)
  81 {
  82   if (!strcmp(arg, "help"))
  83     {
  84       struct pci_param *p;
  85       printf("Known PCI access parameters:\n\n");
  86       for (p=NULL; p=pci_walk_params(pacc, p);)
  87         printf("%-20s %s (%s)\n", p->param, p->help, p->value);
  88       exit(0);
  89     }
  90   else
  91     {
  92       char *sep = strchr(arg, '=');
  93       if (!sep)
  94         die("Invalid PCI access parameter syntax: %s", arg);
  95       *sep++ = 0;
  96       if (pci_set_param(pacc, arg, sep) < 0)
  97         die("Unrecognized PCI access parameter: %s (see `-O help' for a list)", arg);
  98     }
  99 }
 100
 101 int
 102 parse_generic_option(int i, struct pci_access *pacc, char *arg)
 103 {
 104   switch (i)
 105     {
 106 #ifdef PCI_HAVE_PM_INTEL_CONF
 107     case 'H':
 108       if (!strcmp(arg, "1"))
 109         pacc->method = PCI_ACCESS_I386_TYPE1;
 110       else if (!strcmp(arg, "2"))
 111         pacc->method = PCI_ACCESS_I386_TYPE2;
 112       else
 113         die("Unknown hardware configuration type %s", arg);
 114       break;
 115 #endif
 116 #ifdef PCI_HAVE_PM_DUMP
 117     case 'F':
 118       pci_set_param(pacc, "dump.name", arg);
 119       pacc->method = PCI_ACCESS_DUMP;
 120       break;
 121 #endif
 122     case 'A':
 123       set_pci_method(pacc, arg);
 124       break;
 125     case 'G':
 126       pacc->debugging++;
 127       break;
 128     case 'O':
 129       set_pci_option(pacc, arg);
 130       break;
 131     default:
 132       return 0;
 133     }
 134   return 1;
 135 }