toolchain/dependencies/env.c

   1 /* print the current environment to track eventually changed settings.
   2  *
   3  * Copyright (C) 2008 Bernhard Fischer
   4  *
   5  * Licensed under GPLv2 or later, see
   6  *   http://www.gnu.org/licenses/gpl.txt
   7  */
   8 #include <unistd.h>
   9 #include <stdio.h>
  10 #include <string.h>
  11 extern char **environ;
  12
  13 static const char skip[] =
  14         "_=\0SSH_CLIENT=\0SSH_TTY=\0SSH_CONNECTION=\0DISPLAY=\0";
  15 int main(void)
  16 {
  17         char **envp;
  18         int ret = 0;
  19         for (envp = environ; *envp; envp++) {
  20                 unsigned ok = 1;
  21                 const char *str = skip;
  22                 while (str) {
  23                         size_t len = strlen(str);
  24                         if (!len)
  25                                 break;
  26                         if (!strncmp(str, envp[0], len)) {
  27                                 ok = 0;
  28                                 break;
  29                         }
  30                         str += ++len;
  31                 }
  32                 if (!ok)
  33                         continue;
  34                 if (puts(*envp) <= 0) {
  35                         ret = 1;
  36                         break;
  37                 }
  38         }
  39         return ret;
  40 }