usr.sbin/installer/libdfui/system.c

   1 /*
   2  * system.c
   3  * System definitions and capabilities.
   4  * $Id: system.c,v 1.5 2004/11/14 02:45:51 cpressey Exp $
   5  */
   6
   7 #include <sys/param.h>
   8 #include <sys/sysctl.h>
   9
  10 #include <err.h>
  11 #include <stdio.h>
  12 #include <string.h>
  13 #include <sysexits.h>
  14
  15 #include "dfui.h"
  16 #include "system.h"
  17
  18 char *
  19 ostype(void)
  20 {
  21         int mib[2];
  22         size_t len;
  23         char *p;
  24
  25         mib[0] = CTL_KERN;
  26         mib[1] = KERN_OSTYPE;
  27         sysctl(mib, 2, NULL, &len, NULL, 0);
  28         p = malloc(len);
  29         sysctl(mib, 2, p, &len, NULL, 0);
  30         return p;
  31 }
  32
  33 int
  34 has_npipe(void)
  35 {
  36 #ifdef HAS_NPIPE
  37         return 1;
  38 #else
  39         return 0;
  40 #endif
  41 }
  42
  43 int
  44 has_tcp(void)
  45 {
  46 #ifdef HAS_TCP
  47         return 1;
  48 #else
  49         return 0;
  50 #endif
  51 }
  52
  53 /*
  54  * Get transport from transport name.
  55  *
  56  * return(0) if transport is not supported.
  57  * retirn(-1) if transport unknown.
  58  */
  59 int
  60 get_transport(const char *transport_name)
  61 {
  62         if (strcmp(transport_name, "npipe") == 0) {
  63                 if (has_npipe())
  64                         return DFUI_TRANSPORT_NPIPE;
  65                 return(0);
  66         } else if (strcmp(transport_name, "tcp") == 0) {
  67                 if (has_tcp())
  68                         return DFUI_TRANSPORT_TCP;
  69                 return(0);
  70         }
  71         return(-1);
  72 }
  73
  74 /*
  75  * Get transport upon user request
  76  *
  77  * Print appropriate error message to stderr
  78  * and exit if transport not supported or unknown.
  79  */
  80 int
  81 user_get_transport(const char *transport_name)
  82 {
  83         int transport;
  84
  85         transport = get_transport(transport_name);
  86
  87         if (transport == 0) {
  88                 errx(EX_UNAVAILABLE, "Transport is not supported: ``%s''.\n",
  89                     transport_name);
  90         } else if (transport < 0) {
  91                 errx(EX_CONFIG, "Wrong transport name: ``%s''.\n",
  92                     transport_name);
  93         }
  94
  95         return(transport);
  96 }