release/src/router/busybox/libbb/get_shell_name.c

   1 /*
   2  * Copyright 2011, Denys Vlasenko
   3  *
   4  * Licensed under GPLv2, see file LICENSE in this source tree.
   5  */
   6
   7 //kbuild:lib-y += get_shell_name.o
   8
   9 #include "libbb.h"
  10
  11 const char* FAST_FUNC get_shell_name(void)
  12 {
  13         struct passwd *pw;
  14         char *shell;
  15
  16         shell = getenv("SHELL");
  17         if (shell && shell[0])
  18                 return shell;
  19
  20         pw = getpwuid(getuid());
  21         if (pw && pw->pw_shell && pw->pw_shell[0])
  22                 return pw->pw_shell;
  23
  24         return DEFAULT_SHELL;
  25 }