702 lines
17 KiB
C
702 lines
17 KiB
C
/*
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This file is part of GNUnet.
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Copyright (C) 2006-2014 Christian Grothoff (and other contributing authors)
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GNUnet is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published
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by the Free Software Foundation; either version 3, or (at your
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option) any later version.
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GNUnet is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNUnet; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA.
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*/
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/**
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* @file os_installation.c
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* @brief get paths used by the program; based heavily on the
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* corresponding GNUnet file, just adapted for Taler.
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* @author Milan
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*/
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#include "platform.h"
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#include <gnunet/gnunet_util_lib.h>
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#if DARWIN
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#include <mach-o/ldsyms.h>
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#include <mach-o/dyld.h>
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#elif WINDOWS
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#include <windows.h>
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#endif
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#define LOG(kind,...) GNUNET_log_from (kind, "util", __VA_ARGS__)
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#define LOG_STRERROR_FILE(kind,syscall,filename) GNUNET_log_from_strerror_file (kind, "util", syscall, filename)
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#if LINUX
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/**
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* Try to determine path by reading /proc/PID/exe
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*
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* @return NULL on error
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*/
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static char *
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get_path_from_proc_maps ()
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{
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char fn[64];
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char line[1024];
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char dir[1024];
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FILE *f;
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char *lgu;
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GNUNET_snprintf (fn, sizeof (fn), "/proc/%u/maps", getpid ());
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if (NULL == (f = FOPEN (fn, "r")))
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return NULL;
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while (NULL != fgets (line, sizeof (line), f))
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{
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if ((1 ==
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SSCANF (line, "%*x-%*x %*c%*c%*c%*c %*x %*2x:%*2x %*u%*[ ]%1023s", dir)) &&
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(NULL != (lgu = strstr (dir, "libtalerutil"))))
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{
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lgu[0] = '\0';
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FCLOSE (f);
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return GNUNET_strdup (dir);
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}
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}
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FCLOSE (f);
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return NULL;
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}
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/**
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* Try to determine path by reading /proc/PID/exe
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*
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* @return NULL on error
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*/
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static char *
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get_path_from_proc_exe ()
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{
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char fn[64];
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char lnk[1024];
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ssize_t size;
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GNUNET_snprintf (fn, sizeof (fn), "/proc/%u/exe", getpid ());
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size = readlink (fn, lnk, sizeof (lnk) - 1);
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if (size <= 0)
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{
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LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_ERROR, "readlink", fn);
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return NULL;
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}
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GNUNET_assert (size < sizeof (lnk));
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lnk[size] = '\0';
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while ((lnk[size] != '/') && (size > 0))
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size--;
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/* test for being in lib/taler/libexec/ or lib/MULTIARCH/taler/libexec */
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if ( (size > strlen ("/taler/libexec/")) &&
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(0 == strcmp ("/taler/libexec/",
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&lnk[size - strlen ("/taler/libexec/")])) )
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size -= strlen ("taler/libexec/");
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if ((size < 4) || (lnk[size - 4] != '/'))
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{
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/* not installed in "/bin/" -- binary path probably useless */
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return NULL;
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}
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lnk[size] = '\0';
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return GNUNET_strdup (lnk);
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}
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#endif
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#if WINDOWS
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static HINSTANCE dll_instance;
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/**
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* GNUNET_util_cl_init() in common_logging.c is preferred.
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* This function is only for thread-local storage (not used in GNUnet)
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* and hInstance saving.
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*/
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BOOL WINAPI
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DllMain (HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
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{
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switch (fdwReason)
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{
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case DLL_PROCESS_ATTACH:
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dll_instance = hinstDLL;
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break;
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case DLL_THREAD_ATTACH:
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break;
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case DLL_THREAD_DETACH:
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break;
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case DLL_PROCESS_DETACH:
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break;
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}
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return TRUE;
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}
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/**
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* Try to determine path with win32-specific function
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*
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* @return NULL on error
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*/
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static char *
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get_path_from_module_filename ()
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{
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size_t pathlen = 512;
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DWORD real_pathlen;
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wchar_t *idx;
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wchar_t *modulepath = NULL;
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char *upath;
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uint8_t *u8_string;
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size_t u8_string_length;
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/* This braindead function won't tell us how much space it needs, so
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* we start at 1024 and double the space up if it doesn't fit, until
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* it fits, or we exceed the threshold.
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*/
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do
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{
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pathlen = pathlen * 2;
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modulepath = GNUNET_realloc (modulepath, pathlen * sizeof (wchar_t));
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SetLastError (0);
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real_pathlen = GetModuleFileNameW (dll_instance, modulepath, pathlen * sizeof (wchar_t));
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} while (real_pathlen >= pathlen && pathlen < 16*1024);
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if (real_pathlen >= pathlen)
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GNUNET_assert (0);
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/* To be safe */
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modulepath[real_pathlen] = '\0';
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idx = modulepath + real_pathlen;
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while ((idx > modulepath) && (*idx != L'\\') && (*idx != L'/'))
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idx--;
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*idx = L'\0';
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/* Now modulepath holds full path to the directory where libtalerutil is.
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* This directory should look like <TALER_PREFIX>/bin or <TALER_PREFIX>.
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*/
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if (wcschr (modulepath, L'/') || wcschr (modulepath, L'\\'))
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{
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/* At least one directory component (i.e. we're not in a root directory) */
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wchar_t *dirname = idx;
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while ((dirname > modulepath) && (*dirname != L'\\') && (*dirname != L'/'))
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dirname--;
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*dirname = L'\0';
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if (dirname > modulepath)
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{
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dirname++;
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/* Now modulepath holds full path to the parent directory of the directory
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* where libtalerutil is.
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* dirname holds the name of the directory where libtalerutil is.
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*/
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if (wcsicmp (dirname, L"bin") == 0)
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{
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/* pass */
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}
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else
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{
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/* Roll back our changes to modulepath */
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dirname--;
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*dirname = L'/';
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}
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}
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}
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/* modulepath is TALER_PREFIX */
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u8_string = u16_to_u8 (modulepath, wcslen (modulepath), NULL, &u8_string_length);
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if (NULL == u8_string)
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GNUNET_assert (0);
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upath = GNUNET_malloc (u8_string_length + 1);
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memcpy (upath, u8_string, u8_string_length);
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upath[u8_string_length] = '\0';
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free (u8_string);
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GNUNET_free (modulepath);
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return upath;
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}
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#endif
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#if DARWIN
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/**
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* Signature of the '_NSGetExecutablePath" function.
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*
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* @param buf where to write the path
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* @param number of bytes available in 'buf'
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* @return 0 on success, otherwise desired number of bytes is stored in 'bufsize'
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*/
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typedef int (*MyNSGetExecutablePathProto) (char *buf, size_t * bufsize);
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/**
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* Try to obtain the path of our executable using '_NSGetExecutablePath'.
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*
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* @return NULL on error
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*/
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static char *
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get_path_from_NSGetExecutablePath ()
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{
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static char zero = '\0';
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char *path;
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size_t len;
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MyNSGetExecutablePathProto func;
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path = NULL;
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if (NULL == (func =
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(MyNSGetExecutablePathProto) dlsym (RTLD_DEFAULT, "_NSGetExecutablePath")))
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return NULL;
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path = &zero;
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len = 0;
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/* get the path len, including the trailing \0 */
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(void) func (path, &len);
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if (0 == len)
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return NULL;
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path = GNUNET_malloc (len);
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if (0 != func (path, &len))
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{
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GNUNET_free (path);
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return NULL;
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}
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len = strlen (path);
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while ((path[len] != '/') && (len > 0))
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len--;
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path[len] = '\0';
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return path;
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}
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/**
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* Try to obtain the path of our executable using '_dyld_image' API.
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*
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* @return NULL on error
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*/
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static char *
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get_path_from_dyld_image ()
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{
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const char *path;
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char *p;
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char *s;
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unsigned int i;
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int c;
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c = _dyld_image_count ();
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for (i = 0; i < c; i++)
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{
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if (((const void *) _dyld_get_image_header (i)) != (const void *)&_mh_dylib_header)
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continue;
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path = _dyld_get_image_name (i);
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if ( (NULL == path) || (0 == strlen (path)) )
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continue;
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p = GNUNET_strdup (path);
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s = p + strlen (p);
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while ((s > p) && ('/' != *s))
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s--;
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s++;
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*s = '\0';
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return p;
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}
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return NULL;
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}
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#endif
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/**
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* Return the actual path to a file found in the current
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* PATH environment variable.
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*
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* @param binary the name of the file to find
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* @return path to binary, NULL if not found
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*/
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static char *
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get_path_from_PATH (const char *binary)
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{
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char *path;
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char *pos;
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char *end;
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char *buf;
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const char *p;
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if (NULL == (p = getenv ("PATH")))
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return NULL;
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#if WINDOWS
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/* On W32 look in CWD first. */
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GNUNET_asprintf (&path, ".%c%s", PATH_SEPARATOR, p);
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#else
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path = GNUNET_strdup (p); /* because we write on it */
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#endif
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buf = GNUNET_malloc (strlen (path) + strlen (binary) + 1 + 1);
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pos = path;
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while (NULL != (end = strchr (pos, PATH_SEPARATOR)))
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{
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*end = '\0';
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sprintf (buf, "%s/%s", pos, binary);
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if (GNUNET_DISK_file_test (buf) == GNUNET_YES)
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{
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pos = GNUNET_strdup (pos);
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GNUNET_free (buf);
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GNUNET_free (path);
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return pos;
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}
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pos = end + 1;
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}
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sprintf (buf, "%s/%s", pos, binary);
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if (GNUNET_YES == GNUNET_DISK_file_test (buf))
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{
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pos = GNUNET_strdup (pos);
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GNUNET_free (buf);
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GNUNET_free (path);
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return pos;
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}
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GNUNET_free (buf);
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GNUNET_free (path);
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return NULL;
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}
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/**
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* Try to obtain the installation path using the "TALER_PREFIX" environment
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* variable.
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*
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* @return NULL on error (environment variable not set)
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*/
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static char *
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get_path_from_TALER_PREFIX ()
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{
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const char *p;
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if (NULL != (p = getenv ("TALER_PREFIX")))
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return GNUNET_strdup (p);
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return NULL;
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}
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/**
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* @brief get the path to Taler bin/ or lib/, prefering the lib/ path
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* @author Milan
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*
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* @return a pointer to the executable path, or NULL on error
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*/
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static char *
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os_get_taler_path ()
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{
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char *ret;
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if (NULL != (ret = get_path_from_TALER_PREFIX ()))
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return ret;
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#if LINUX
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if (NULL != (ret = get_path_from_proc_maps ()))
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return ret;
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/* try path *first*, before /proc/exe, as /proc/exe can be wrong */
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if (NULL != (ret = get_path_from_PATH ("taler-mint-httpd")))
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return ret;
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if (NULL != (ret = get_path_from_proc_exe ()))
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return ret;
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#endif
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#if WINDOWS
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if (NULL != (ret = get_path_from_module_filename ()))
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return ret;
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#endif
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#if DARWIN
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if (NULL != (ret = get_path_from_dyld_image ()))
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return ret;
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if (NULL != (ret = get_path_from_NSGetExecutablePath ()))
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return ret;
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#endif
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if (NULL != (ret = get_path_from_PATH ("taler-mint-httpd")))
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return ret;
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/* other attempts here */
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LOG (GNUNET_ERROR_TYPE_ERROR,
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_("Could not determine installation path for %s. Set `%s' environment variable.\n"),
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"Taler", "TALER_PREFIX");
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return NULL;
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}
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/**
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* @brief get the path to current app's bin/
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* @author Milan
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*
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* @return a pointer to the executable path, or NULL on error
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*/
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static char *
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os_get_exec_path ()
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{
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char *ret = NULL;
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#if LINUX
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if (NULL != (ret = get_path_from_proc_exe ()))
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return ret;
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#endif
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#if WINDOWS
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if (NULL != (ret = get_path_from_module_filename ()))
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return ret;
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#endif
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#if DARWIN
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if (NULL != (ret = get_path_from_NSGetExecutablePath ()))
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return ret;
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#endif
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/* other attempts here */
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return ret;
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}
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/**
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* @brief get the path to a specific Taler installation directory or,
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* with #TALER_OS_IPK_SELF_PREFIX, the current running apps installation directory
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* @author Milan
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* @return a pointer to the dir path (to be freed by the caller)
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*/
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char *
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TALER_os_installation_get_path (enum GNUNET_OS_InstallationPathKind dirkind)
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{
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size_t n;
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const char *dirname;
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char *execpath = NULL;
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char *tmp;
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char *multiarch;
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char *libdir;
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int isbasedir;
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/* if wanted, try to get the current app's bin/ */
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if (dirkind == GNUNET_OS_IPK_SELF_PREFIX)
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execpath = os_get_exec_path ();
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/* try to get Taler's bin/ or lib/, or if previous was unsuccessful some
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* guess for the current app */
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if (NULL == execpath)
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execpath = os_get_taler_path ();
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if (NULL == execpath)
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return NULL;
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n = strlen (execpath);
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if (0 == n)
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{
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/* should never happen, but better safe than sorry */
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GNUNET_free (execpath);
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return NULL;
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}
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/* remove filename itself */
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while ((n > 1) && (DIR_SEPARATOR == execpath[n - 1]))
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execpath[--n] = '\0';
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isbasedir = 1;
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if ((n > 6) &&
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((0 == strcasecmp (&execpath[n - 6], "/lib32")) ||
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(0 == strcasecmp (&execpath[n - 6], "/lib64"))))
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{
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if ( (GNUNET_OS_IPK_LIBDIR != dirkind) &&
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(GNUNET_OS_IPK_LIBEXECDIR != dirkind) )
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{
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/* strip '/lib32' or '/lib64' */
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execpath[n - 6] = '\0';
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n -= 6;
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}
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else
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isbasedir = 0;
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}
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else if ((n > 4) &&
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((0 == strcasecmp (&execpath[n - 4], "/bin")) ||
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(0 == strcasecmp (&execpath[n - 4], "/lib"))))
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{
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/* strip '/bin' or '/lib' */
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execpath[n - 4] = '\0';
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n -= 4;
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}
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multiarch = NULL;
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if (NULL != (libdir = strstr (execpath, "/lib/")))
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{
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/* test for multi-arch path of the form "PREFIX/lib/MULTIARCH/";
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here we need to re-add 'multiarch' to lib and libexec paths later! */
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multiarch = &libdir[5];
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if (NULL == strchr (multiarch, '/'))
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libdir[0] = '\0'; /* Debian multiarch format, cut of from 'execpath' but preserve in multicarch */
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else
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multiarch = NULL; /* maybe not, multiarch still has a '/', which is not OK */
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}
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/* in case this was a directory named foo-bin, remove "foo-" */
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while ((n > 1) && (execpath[n - 1] == DIR_SEPARATOR))
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execpath[--n] = '\0';
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switch (dirkind)
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{
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case GNUNET_OS_IPK_PREFIX:
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case GNUNET_OS_IPK_SELF_PREFIX:
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dirname = DIR_SEPARATOR_STR;
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break;
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case GNUNET_OS_IPK_BINDIR:
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dirname = DIR_SEPARATOR_STR "bin" DIR_SEPARATOR_STR;
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break;
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case GNUNET_OS_IPK_LIBDIR:
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if (isbasedir)
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{
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GNUNET_asprintf (&tmp,
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"%s%s%s%s%s",
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|
execpath,
|
|
DIR_SEPARATOR_STR "lib",
|
|
(NULL != multiarch) ? DIR_SEPARATOR_STR : "",
|
|
(NULL != multiarch) ? multiarch : "",
|
|
DIR_SEPARATOR_STR "taler" DIR_SEPARATOR_STR);
|
|
if (GNUNET_YES ==
|
|
GNUNET_DISK_directory_test (tmp, GNUNET_YES))
|
|
{
|
|
GNUNET_free (execpath);
|
|
return tmp;
|
|
}
|
|
GNUNET_free (tmp);
|
|
tmp = NULL;
|
|
if (4 == sizeof (void *))
|
|
{
|
|
dirname =
|
|
DIR_SEPARATOR_STR "lib32" DIR_SEPARATOR_STR "taler" DIR_SEPARATOR_STR;
|
|
GNUNET_asprintf (&tmp,
|
|
"%s%s",
|
|
execpath,
|
|
dirname);
|
|
}
|
|
if (8 == sizeof (void *))
|
|
{
|
|
dirname =
|
|
DIR_SEPARATOR_STR "lib64" DIR_SEPARATOR_STR "taler" DIR_SEPARATOR_STR;
|
|
GNUNET_asprintf (&tmp,
|
|
"%s%s",
|
|
execpath,
|
|
dirname);
|
|
}
|
|
|
|
if ( (NULL != tmp) &&
|
|
(GNUNET_YES ==
|
|
GNUNET_DISK_directory_test (tmp, GNUNET_YES)) )
|
|
{
|
|
GNUNET_free (execpath);
|
|
return tmp;
|
|
}
|
|
GNUNET_free (tmp);
|
|
}
|
|
dirname = DIR_SEPARATOR_STR "taler" DIR_SEPARATOR_STR;
|
|
break;
|
|
case GNUNET_OS_IPK_DATADIR:
|
|
dirname =
|
|
DIR_SEPARATOR_STR "share" DIR_SEPARATOR_STR "taler" DIR_SEPARATOR_STR;
|
|
break;
|
|
case GNUNET_OS_IPK_LOCALEDIR:
|
|
dirname =
|
|
DIR_SEPARATOR_STR "share" DIR_SEPARATOR_STR "locale" DIR_SEPARATOR_STR;
|
|
break;
|
|
case GNUNET_OS_IPK_ICONDIR:
|
|
dirname =
|
|
DIR_SEPARATOR_STR "share" DIR_SEPARATOR_STR "icons" DIR_SEPARATOR_STR;
|
|
break;
|
|
case GNUNET_OS_IPK_DOCDIR:
|
|
dirname =
|
|
DIR_SEPARATOR_STR "share" DIR_SEPARATOR_STR "doc" DIR_SEPARATOR_STR \
|
|
"gnunet" DIR_SEPARATOR_STR;
|
|
break;
|
|
case GNUNET_OS_IPK_LIBEXECDIR:
|
|
if (isbasedir)
|
|
{
|
|
dirname =
|
|
DIR_SEPARATOR_STR "taler" DIR_SEPARATOR_STR "libexec" DIR_SEPARATOR_STR;
|
|
GNUNET_asprintf (&tmp,
|
|
"%s%s%s%s",
|
|
execpath,
|
|
DIR_SEPARATOR_STR "lib" DIR_SEPARATOR_STR,
|
|
(NULL != multiarch) ? multiarch : "",
|
|
dirname);
|
|
if (GNUNET_YES ==
|
|
GNUNET_DISK_directory_test (tmp, GNUNET_YES))
|
|
{
|
|
GNUNET_free (execpath);
|
|
return tmp;
|
|
}
|
|
GNUNET_free (tmp);
|
|
tmp = NULL;
|
|
if (4 == sizeof (void *))
|
|
{
|
|
dirname =
|
|
DIR_SEPARATOR_STR "lib32" DIR_SEPARATOR_STR "taler" DIR_SEPARATOR_STR \
|
|
"libexec" DIR_SEPARATOR_STR;
|
|
GNUNET_asprintf (&tmp,
|
|
"%s%s",
|
|
execpath,
|
|
dirname);
|
|
}
|
|
if (8 == sizeof (void *))
|
|
{
|
|
dirname =
|
|
DIR_SEPARATOR_STR "lib64" DIR_SEPARATOR_STR "taler" DIR_SEPARATOR_STR \
|
|
"libexec" DIR_SEPARATOR_STR;
|
|
GNUNET_asprintf (&tmp,
|
|
"%s%s",
|
|
execpath,
|
|
dirname);
|
|
}
|
|
if ( (NULL != tmp) &&
|
|
(GNUNET_YES ==
|
|
GNUNET_DISK_directory_test (tmp, GNUNET_YES)) )
|
|
{
|
|
GNUNET_free (execpath);
|
|
return tmp;
|
|
}
|
|
|
|
GNUNET_free (tmp);
|
|
}
|
|
dirname =
|
|
DIR_SEPARATOR_STR "taler" DIR_SEPARATOR_STR \
|
|
"libexec" DIR_SEPARATOR_STR;
|
|
break;
|
|
default:
|
|
GNUNET_free (execpath);
|
|
return NULL;
|
|
}
|
|
GNUNET_asprintf (&tmp,
|
|
"%s%s",
|
|
execpath,
|
|
dirname);
|
|
GNUNET_free (execpath);
|
|
return tmp;
|
|
}
|
|
|
|
|
|
/**
|
|
* Given the name of a taler-helper, taler-service or taler-daemon
|
|
* binary, try to prefix it with the libexec/-directory to get the
|
|
* full path.
|
|
*
|
|
* @param progname name of the binary
|
|
* @return full path to the binary, if possible, otherwise copy of 'progname'
|
|
*/
|
|
char *
|
|
TALER_OS_get_libexec_binary_path (const char *progname)
|
|
{
|
|
static char *cache;
|
|
char *libexecdir;
|
|
char *binary;
|
|
|
|
if ( (DIR_SEPARATOR == progname[0]) ||
|
|
(GNUNET_YES == GNUNET_STRINGS_path_is_absolute (progname, GNUNET_NO, NULL, NULL)) )
|
|
return GNUNET_strdup (progname);
|
|
if (NULL != cache)
|
|
libexecdir = cache;
|
|
else
|
|
libexecdir = GNUNET_OS_installation_get_path (GNUNET_OS_IPK_LIBEXECDIR);
|
|
if (NULL == libexecdir)
|
|
return GNUNET_strdup (progname);
|
|
GNUNET_asprintf (&binary,
|
|
"%s%s",
|
|
libexecdir,
|
|
progname);
|
|
cache = libexecdir;
|
|
return binary;
|
|
}
|
|
|
|
|
|
|
|
/* end of os_installation.c */
|