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libc.c (2061B)

      1 /* Copyright (c) 2001 Matej Pfajfar.
      2 * Copyright (c) 2001-2004, Roger Dingledine.
      3 * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
      4 * Copyright (c) 2007-2021, The Tor Project, Inc. */
      5 /* See LICENSE for licensing information */
      6 
      7 /**
      8 * @file libc.c
      9 * @brief Functions to get the name and version of the system libc.
     10 **/
     11 
     12 #include "orconfig.h"
     13 #include "lib/osinfo/libc.h"
     14 #include <stdlib.h>
     15 
     16 #ifdef HAVE_GNU_LIBC_VERSION_H
     17 #include <gnu/libc-version.h>
     18 #endif
     19 
     20 #ifdef HAVE_GNU_LIBC_VERSION_H
     21 #ifdef HAVE_GNU_GET_LIBC_VERSION
     22 #define CHECK_LIBC_VERSION
     23 #endif
     24 #endif
     25 
     26 #define STR_IMPL(x) #x
     27 #define STR(x) STR_IMPL(x)
     28 
     29 #if defined(__BSD_VISIBLE) || defined(__NETBSD_SOURCE)
     30 #include <sys/param.h>
     31 #endif /* defined(__BSD_VISIBLE) || defined(__NETBSD_SOURCE) */
     32 
     33 /** Return the name of the compile time libc. Returns NULL if we
     34 * cannot identify the libc. */
     35 const char *
     36 tor_libc_get_name(void)
     37 {
     38 #if defined(__BSD_VISIBLE) || defined(__NETBSD_SOURCE)
     39  return "BSD";
     40 #endif /* defined(__BSD_VISIBLE) || defined(__NETBSD_SOURCE) */
     41 #ifdef __GLIBC__
     42  return "Glibc";
     43 #else /* !defined(__GLIBC__) */
     44  return NULL;
     45 #endif /* defined(__GLIBC__) */
     46 }
     47 
     48 /** Return a string representation of the version of the currently running
     49 * version of Glibc. */
     50 const char *
     51 tor_libc_get_version_str(void)
     52 {
     53 #ifdef __DragonFly_version
     54  return STR(__DragonFly_version);
     55 #endif
     56 #ifdef __FreeBSD__
     57  return STR(__FreeBSD_version);
     58 #endif
     59 #ifdef __NetBSD_Version__
     60  return STR(__NetBSD_Version__);
     61 #endif
     62 #ifdef OpenBSD
     63  return STR(OpenBSD);
     64 #endif
     65 #ifdef CHECK_LIBC_VERSION
     66  const char *version = gnu_get_libc_version();
     67  if (version == NULL)
     68    return "N/A";
     69  return version;
     70 #else /* !defined(CHECK_LIBC_VERSION) */
     71  return "N/A";
     72 #endif /* defined(CHECK_LIBC_VERSION) */
     73 }
     74 
     75 /** Return a string representation of the version of Glibc that was used at
     76 * compilation time. */
     77 const char *
     78 tor_libc_get_header_version_str(void)
     79 {
     80 #ifdef __GLIBC__
     81  return STR(__GLIBC__) "." STR(__GLIBC_MINOR__);
     82 #else
     83  return "N/A";
     84 #endif /* defined(__GLIBC__) */
     85 }