tools-for-build/os-provides-getprotoby-r-test.c

   1 /* test to build and run so that we know if we have getprotobyname_r
   2  * and getprotobynumber_r */
   3
   4 #include <netdb.h>
   5
   6 #define BUFSIZE 1024
   7
   8 int main ()
   9 {
  10 #if __NetBSD__
  11     /*
  12      * For me the code below compiles, but it segfaults when actually run:
  13      * (gdb) where
  14      *  #0  0x00007f7fc20050a9 in _rtld_symlook_obj () from /usr/libexec/ld.elf_so
  15      *  #1  0x00007f7fc20059e0 in _rtld_symlook_default () from /usr/libexec/ld.elf_so
  16      *  #2  0x00007f7fc20060d3 in _rtld_find_plt_symdef () from /usr/libexec/ld.elf_so
  17      *  #3  0x00007f7fc2000bc5 in _rtld_bind () from /usr/libexec/ld.elf_so
  18      *  #4  0x00007f7fc20007fd in _rtld_bind_start () from /usr/libexec/ld.elf_so
  19      *  #5  0x0000000000000000 in ?? ()
  20      *
  21      * I guess that somebody decided it would be clever to pretend that the calls exist,
  22      * but then /usr/libexec/ld.elf_so can't figure out what to do.
  23      *
  24      * This is EXTREMELY disconcerting, as it occurs during 'make-config.sh'
  25      * and so you're not sure (without a nontrivial amount of debugging)
  26      * whether configuration completed without error.
  27      */
  28     return 1; // just say "no"
  29 #else
  30     struct protoent result_buf;
  31     struct protoent *result;
  32     char buf[BUFSIZE];
  33     getprotobyname_r("", &result_buf, buf, BUFSIZE, &result);
  34     getprotobynumber_r(0, &result_buf, buf, BUFSIZE, &result);
  35     return 104;
  36 #endif
  37 }