linux32.c

   1 #include <sys/personality.h>
   2 #include <stdlib.h>
   3 #include <unistd.h>
   4 #include <stdio.h>
   5 #ifdef USE_LIBULZ
   6 #include <ulz/stdio-repl.h>
   7 #endif
   8
   9
  10 #if !defined(_Noreturn) && __STDC_VERSION__+0 < 201112L
  11 #ifdef __GNUC__
  12 #define _Noreturn __attribute__((noreturn))
  13 #else
  14 #define _Noreturn
  15 #endif
  16 #endif
  17
  18 #ifndef PER_LINUX32
  19 #define PER_LINUX32 8
  20 #endif
  21
  22 static _Noreturn void die(const char *msg) {
  23         dprintf(2, msg);
  24         exit(1);
  25 }
  26
  27 static _Noreturn void usage(void) {
  28         die("usage: linux32 command [options...]\n"
  29             "executes command with options in 32bit linux mode\n"
  30             "(uname will report 32bit arch)\n");
  31 }
  32
  33 int main(int argc, char** argv) {
  34         if(argc == 1) usage();
  35         if(personality(PER_LINUX32) == -1) die("could not set 32bit persona");
  36         extern char ** environ;
  37         if(execve(argv[1], &argv[1], environ) == -1) perror("execve");
  38         return 1;
  39 }
  40