LXR toybox/toys/posix/uname.c

   1/* uname.c - return system name
   2 *
   3 * Copyright 2008 Rob Landley <rob@landley.net>
   4 *
   5 * See http://opengroup.org/onlinepubs/9699919799/utilities/uname.html
   6
   7USE_UNAME(NEWTOY(uname, "oamvrns[+os]", TOYFLAG_BIN))
   8USE_ARCH(NEWTOY(arch, 0, TOYFLAG_USR|TOYFLAG_BIN))
   9
  10config ARCH 
  11  bool "arch"
  12  default y
  13  help
  14    usage: arch
  15
  16    Print machine (hardware) name, same as uname -m.
  17
  18config UNAME
  19  bool "uname"
  20  default y
  21  help
  22    usage: uname [-asnrvm]
  23
  24    Print system information.
  25
  26    -s  System name
  27    -n  Network (domain) name
  28    -r  Kernel Release number
  29    -v  Kernel Version 
  30    -m  Machine (hardware) name
  31    -a  All of the above
  32*/
  33
  34#define FOR_uname
  35#define FORCE_FLAGS
  36#include "toys.h"
  37
  38// If a 32 bit x86 build environment working in a chroot under an x86-64
  39// kernel returns x86_64 for -m it confuses ./configure.  Special case it.
  40
  41#if defined(__i686__)
  42#define GROSS "i686"
  43#elif defined(__i586__)
  44#define GROSS "i586"
  45#elif defined(__i486__)
  46#define GROSS "i486"
  47#elif defined(__i386__)
  48#define GROSS "i386"
  49#endif
  50
  51void uname_main(void)
  52{
  53  int i, flags = toys.optflags, needspace=0;
  54  struct utsname u;
  55
  56  uname(&u);
  57
  58  if (!flags) flags = FLAG_s;
  59  for (i=0; i<5; i++) {
  60    char *c = ((char *) &u)+(sizeof(u.sysname)*i);
  61
  62    if (flags & ((1<<i)|FLAG_a)) {
  63      int len = strlen(c);
  64
  65      // This problem originates in autoconf, so of course the solution
  66      // is horribly ugly.
  67#ifdef GROSS
  68      if (i==4 && !strcmp(c,"x86_64")) {
  69        printf(GROSS);
  70        continue;
  71      }
  72#endif
  73
  74      if (needspace++) {
  75        // We can't decrement on the first entry, because
  76        // needspace would be 0
  77        *(--c)=' ';
  78        len++;
  79      }
  80      xwrite(1, c, len);
  81    }
  82  }
  83  putchar('\n');
  84}
  85
  86void arch_main(void)
  87{
  88  toys.optflags = FLAG_m;
  89  uname_main();
  90}
  91