third_party/uid_wrapper/wscript

   1 #!/usr/bin/env python
   2
   3 import Options
   4 import os, sys
   5
   6 VERSION="1.2.4"
   7
   8 def configure(conf):
   9     if conf.CHECK_UID_WRAPPER():
  10         conf.DEFINE('USING_SYSTEM_UID_WRAPPER', 1)
  11         libuid_wrapper_so_path = 'libuid_wrapper.so'
  12     else:
  13         # check HAVE_GCC_ATOMIC_BUILTINS
  14         conf.CHECK_CODE('''
  15             #include <stdbool.h>
  16             int main(void) {
  17                 bool x;
  18                 bool *p_x = &x;
  19                 __atomic_load(p_x, &x, __ATOMIC_RELAXED);
  20                 return 0;
  21             ''',
  22             'HAVE_GCC_ATOMIC_BUILTINS',
  23             addmain=False,
  24             msg='Checking for atomic builtins')
  25
  26         # check HAVE_GCC_THREAD_LOCAL_STORAGE
  27         conf.CHECK_CODE('''
  28             __thread int tls;
  29
  30             int main(void) {
  31                 return 0;
  32             }
  33             ''',
  34             'HAVE_GCC_THREAD_LOCAL_STORAGE',
  35             addmain=False,
  36             msg='Checking for thread local storage')
  37
  38         if Options.options.address_sanitizer:
  39             # check HAVE_ADDRESS_SANITIZER_ATTRIBUTE
  40             conf.CHECK_CODE('''
  41                 void test_address_sanitizer_attribute(void) __attribute__((no_sanitize_address));
  42
  43                 void test_address_sanitizer_attribute(void)
  44                 {
  45                     return;
  46                 }
  47
  48                 int main(void) {
  49                     return 0;
  50                 }
  51                 ''',
  52                 'HAVE_ADDRESS_SANITIZER_ATTRIBUTE',
  53                 addmain=False,
  54                 cflags='-Wall -Wextra',
  55                 strict=True,
  56                 msg='Checking for address sanitizer attribute')
  57
  58         # check HAVE_FUNCTION_ATTRIBUTE_FORMAT
  59         conf.CHECK_CODE('''
  60             void log_fn(const char *format, ...) __attribute__ ((format (printf, 1, 2)));
  61
  62             int main(void) {
  63                 return 0;
  64             }
  65             ''',
  66             'HAVE_FUNCTION_ATTRIBUTE_FORMAT',
  67             addmain=False,
  68             strict=True,
  69             msg='Checking for printf format validation support')
  70         # Prototype checks
  71         conf.CHECK_C_PROTOTYPE('setgroups',
  72                         'int setgroups(int ngroups, const gid_t *grouplist)',
  73                         define='HAVE_SETGROUPS_INT', headers='unistd.h sys/types.h')
  74         conf.CHECK_C_PROTOTYPE('syscall',
  75                         'int syscall(int number, ...)',
  76                         define='HAVE_SYSCALL_INT', headers='unistd.h sys/syscall.h')
  77
  78         if (sys.platform.rfind('linux') > -1):
  79             conf.CHECK_CODE('''
  80 #if defined(HAVE_UNISTD_H)
  81 #include <unistd.h>
  82 #endif
  83 #include <stdlib.h>
  84 #include <stdio.h>
  85 #include <sys/types.h>
  86 #include <errno.h>
  87
  88 #ifdef HAVE_SYS_PRIV_H
  89 #include <sys/priv.h>
  90 #endif
  91 #ifdef HAVE_SYS_ID_H
  92 #include <sys/id.h>
  93 #endif
  94
  95 #if defined(HAVE_SYSCALL_H)
  96 #include <syscall.h>
  97 #endif
  98
  99 #if defined(HAVE_SYS_SYSCALL_H)
 100 #include <sys/syscall.h>
 101 #endif
 102
 103 syscall(SYS_setresuid32, -1, -1, -1);
 104 syscall(SYS_setresgid32, -1, -1, -1);
 105 syscall(SYS_setreuid32, -1, -1);
 106 syscall(SYS_setregid32, -1, -1);
 107 syscall(SYS_setuid32, -1);
 108 syscall(SYS_setgid32, -1);
 109 syscall(SYS_setgroups32, 0, NULL);
 110 ''',
 111                 'HAVE_LINUX_32BIT_SYSCALLS',
 112                 msg="Checking whether Linux has 32-bit credential calls");
 113
 114         conf.CHECK_FUNCS('getresuid getresgid')
 115
 116         # Create full path to uid_wrapper
 117         blddir = os.path.realpath(conf.blddir)
 118         libuid_wrapper_so_path = blddir + '/default/third_party/uid_wrapper/libuid-wrapper.so'
 119
 120     conf.DEFINE('LIBUID_WRAPPER_SO_PATH', libuid_wrapper_so_path)
 121     conf.DEFINE('UID_WRAPPER', 1)
 122
 123 def build(bld):
 124     if not bld.CONFIG_SET("USING_SYSTEM_UID_WRAPPER"):
 125         # We need to do it this way or the library wont work.
 126         # Using private_library=True will add symbol version which
 127         # breaks preloading!
 128         bld.SAMBA_LIBRARY('uid_wrapper',
 129                           source='uid_wrapper.c',
 130                           deps='dl',
 131                           install=False,
 132                           realname='libuid-wrapper.so')