/*
This file is part of GNUnet.
- (C) 2006 Christian Grothoff (and other contributing authors)
+ Copyright (C) 2006-2014 Christian Grothoff (and other contributing authors)
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
- by the Free Software Foundation; either version 2, or (at your
+ by the Free Software Foundation; either version 3, or (at your
option) any later version.
GNUnet is distributed in the hope that it will be useful, but
You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
- Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA.
+ Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
*/
/**
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
+#include <unistr.h> /* for u16_to_u8 */
#include "platform.h"
-#include "gnunet_common.h"
-#include "gnunet_configuration_lib.h"
-#include "gnunet_disk_lib.h"
-#include "gnunet_os_lib.h"
-#include "gnunet_strings_lib.h"
+#include "gnunet_util_lib.h"
#if DARWIN
#include <mach-o/ldsyms.h>
#include <mach-o/dyld.h>
+#elif WINDOWS
+#include <windows.h>
#endif
+
#define LOG(kind,...) GNUNET_log_from (kind, "util", __VA_ARGS__)
#define LOG_STRERROR_FILE(kind,syscall,filename) GNUNET_log_from_strerror_file (kind, "util", syscall, filename)
+
#if LINUX
/**
* Try to determine path by reading /proc/PID/exe
while (NULL != fgets (line, sizeof (line), f))
{
if ((1 ==
- SSCANF (line, "%*x-%*x %*c%*c%*c%*c %*x %*2u:%*2u %*u%*[ ]%s", dir)) &&
+ SSCANF (line, "%*x-%*x %*c%*c%*c%*c %*x %*2x:%*2x %*u%*[ ]%1023s", dir)) &&
(NULL != (lgu = strstr (dir, "libgnunetutil"))))
{
lgu[0] = '\0';
lnk[size] = '\0';
while ((lnk[size] != '/') && (size > 0))
size--;
+ /* test for being in lib/gnunet/libexec/ or lib/MULTIARCH/gnunet/libexec */
+ if ( (size > strlen ("/gnunet/libexec/")) &&
+ (0 == strcmp ("/gnunet/libexec/",
+ &lnk[size - strlen ("/gnunet/libexec/")])) )
+ size -= strlen ("gnunet/libexec/");
if ((size < 4) || (lnk[size - 4] != '/'))
{
/* not installed in "/bin/" -- binary path probably useless */
}
#endif
+
#if WINDOWS
+static HINSTANCE dll_instance;
+
+
+/**
+ * GNUNET_util_cl_init() in common_logging.c is preferred.
+ * This function is only for thread-local storage (not used in GNUnet)
+ * and hInstance saving.
+ */
+BOOL WINAPI
+DllMain (HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
+{
+ switch (fdwReason)
+ {
+ case DLL_PROCESS_ATTACH:
+ dll_instance = hinstDLL;
+ break;
+ case DLL_THREAD_ATTACH:
+ break;
+ case DLL_THREAD_DETACH:
+ break;
+ case DLL_PROCESS_DETACH:
+ break;
+ }
+ return TRUE;
+}
+
+
/**
* Try to determine path with win32-specific function
*
static char *
get_path_from_module_filename ()
{
- wchar_t path[4097];
- char upath[4097];
+ size_t pathlen = 512;
+ DWORD real_pathlen;
wchar_t *idx;
-
- GetModuleFileNameW (NULL, path, sizeof (path) - 1);
- idx = path + wcslen (path);
- while ((idx > path) && (*idx != L'\\') && (*idx != L'/'))
+ wchar_t *modulepath = NULL;
+ char *upath;
+ uint8_t *u8_string;
+ size_t u8_string_length;
+
+ /* This braindead function won't tell us how much space it needs, so
+ * we start at 1024 and double the space up if it doesn't fit, until
+ * it fits, or we exceed the threshold.
+ */
+ do
+ {
+ pathlen = pathlen * 2;
+ modulepath = GNUNET_realloc (modulepath, pathlen * sizeof (wchar_t));
+ SetLastError (0);
+ real_pathlen = GetModuleFileNameW (dll_instance, modulepath, pathlen * sizeof (wchar_t));
+ } while (real_pathlen >= pathlen && pathlen < 16*1024);
+ if (real_pathlen >= pathlen)
+ GNUNET_assert (0);
+ /* To be safe */
+ modulepath[real_pathlen] = '\0';
+
+ idx = modulepath + real_pathlen;
+ while ((idx > modulepath) && (*idx != L'\\') && (*idx != L'/'))
idx--;
*idx = L'\0';
- upath[0] = '\0';
- WideCharToMultiByte (CP_UTF8, 0, path, -1, upath, 4097, NULL, NULL);
- return GNUNET_strdup (upath);
+ /* Now modulepath holds full path to the directory where libgnunetutil is.
+ * This directory should look like <GNUNET_PREFIX>/bin or <GNUNET_PREFIX>.
+ */
+ if (wcschr (modulepath, L'/') || wcschr (modulepath, L'\\'))
+ {
+ /* At least one directory component (i.e. we're not in a root directory) */
+ wchar_t *dirname = idx;
+ while ((dirname > modulepath) && (*dirname != L'\\') && (*dirname != L'/'))
+ dirname--;
+ *dirname = L'\0';
+ if (dirname > modulepath)
+ {
+ dirname++;
+ /* Now modulepath holds full path to the parent directory of the directory
+ * where libgnunetutil is.
+ * dirname holds the name of the directory where libgnunetutil is.
+ */
+ if (wcsicmp (dirname, L"bin") == 0)
+ {
+ /* pass */
+ }
+ else
+ {
+ /* Roll back our changes to modulepath */
+ dirname--;
+ *dirname = L'/';
+ }
+ }
+ }
+
+ /* modulepath is GNUNET_PREFIX */
+ u8_string = u16_to_u8 (modulepath, wcslen (modulepath), NULL, &u8_string_length);
+ if (NULL == u8_string)
+ GNUNET_assert (0);
+
+ upath = GNUNET_malloc (u8_string_length + 1);
+ memcpy (upath, u8_string, u8_string_length);
+ upath[u8_string_length] = '\0';
+
+ free (u8_string);
+ GNUNET_free (modulepath);
+
+ return upath;
}
#endif
+
#if DARWIN
/**
* Signature of the '_NSGetExecutablePath" function.
const char *path;
char *p;
char *s;
- int i;
+ unsigned int i;
int c;
- p = NULL;
c = _dyld_image_count ();
for (i = 0; i < c; i++)
{
- if (_dyld_get_image_header (i) == &_mh_dylib_header)
- {
- path = _dyld_get_image_name (i);
- if ( (NULL != path) && (strlen (path) > 0) )
- {
- p = GNUNET_strdup (path);
- s = p + strlen (p);
- while ((s > p) && ('/' != *s))
- s--;
- s++;
- *s = '\0';
- }
- break;
- }
+ if (((const void *) _dyld_get_image_header (i)) != (const void *)&_mh_dylib_header)
+ continue;
+ path = _dyld_get_image_name (i);
+ if ( (NULL == path) || (0 == strlen (path)) )
+ continue;
+ p = GNUNET_strdup (path);
+ s = p + strlen (p);
+ while ((s > p) && ('/' != *s))
+ s--;
+ s++;
+ *s = '\0';
+ return p;
}
- return p;
+ return NULL;
}
#endif
char *buf;
const char *p;
- p = getenv ("PATH");
- if (NULL == p)
+ if (NULL == (p = getenv ("PATH")))
return NULL;
#if WINDOWS
/* On W32 look in CWD first. */
#if LINUX
if (NULL != (ret = get_path_from_proc_maps ()))
return ret;
+ /* try path *first*, before /proc/exe, as /proc/exe can be wrong */
+ if (NULL != (ret = get_path_from_PATH ("gnunet-arm")))
+ return ret;
if (NULL != (ret = get_path_from_proc_exe ()))
return ret;
#endif
return ret;
/* other attempts here */
LOG (GNUNET_ERROR_TYPE_ERROR,
- _
- ("Could not determine installation path for %s. Set `%s' environment variable.\n"),
+ _("Could not determine installation path for %s. Set `%s' environment variable.\n"),
"GNUnet", "GNUNET_PREFIX");
return NULL;
}
static char *
os_get_exec_path ()
{
- char *ret;
+ char *ret = NULL;
#if LINUX
if (NULL != (ret = get_path_from_proc_exe ()))
return ret;
#endif
/* other attempts here */
- return NULL;
+ return ret;
}
/**
* @brief get the path to a specific GNUnet installation directory or,
- * with GNUNET_IPK_SELF_PREFIX, the current running apps installation directory
+ * with #GNUNET_OS_IPK_SELF_PREFIX, the current running apps installation directory
* @author Milan
* @return a pointer to the dir path (to be freed by the caller)
*/
const char *dirname;
char *execpath = NULL;
char *tmp;
+ char *multiarch;
+ char *libdir;
int isbasedir;
/* if wanted, try to get the current app's bin/ */
execpath[--n] = '\0';
isbasedir = 1;
- if ((n > 5) &&
- ((0 == strcasecmp (&execpath[n - 5], "lib32")) ||
- (0 == strcasecmp (&execpath[n - 5], "lib64"))))
+ if ((n > 6) &&
+ ((0 == strcasecmp (&execpath[n - 6], "/lib32")) ||
+ (0 == strcasecmp (&execpath[n - 6], "/lib64"))))
{
- if (GNUNET_OS_IPK_LIBDIR != dirkind)
+ if ( (GNUNET_OS_IPK_LIBDIR != dirkind) &&
+ (GNUNET_OS_IPK_LIBEXECDIR != dirkind) )
{
/* strip '/lib32' or '/lib64' */
- execpath[n - 5] = '\0';
- n -= 5;
+ execpath[n - 6] = '\0';
+ n -= 6;
}
else
isbasedir = 0;
}
- else if ((n > 3) &&
- ((0 == strcasecmp (&execpath[n - 3], "bin")) ||
- (0 == strcasecmp (&execpath[n - 3], "lib"))))
+ else if ((n > 4) &&
+ ((0 == strcasecmp (&execpath[n - 4], "/bin")) ||
+ (0 == strcasecmp (&execpath[n - 4], "/lib"))))
{
/* strip '/bin' or '/lib' */
- execpath[n - 3] = '\0';
- n -= 3;
+ execpath[n - 4] = '\0';
+ n -= 4;
+ }
+ multiarch = NULL;
+ if (NULL != (libdir = strstr (execpath, "/lib/")))
+ {
+ /* test for multi-arch path of the form "PREFIX/lib/MULTIARCH/";
+ here we need to re-add 'multiarch' to lib and libexec paths later! */
+ multiarch = &libdir[5];
+ if (NULL == strchr (multiarch, '/'))
+ libdir[0] = '\0'; /* Debian multiarch format, cut of from 'execpath' but preserve in multicarch */
+ else
+ multiarch = NULL; /* maybe not, multiarch still has a '/', which is not OK */
}
/* in case this was a directory named foo-bin, remove "foo-" */
while ((n > 1) && (execpath[n - 1] == DIR_SEPARATOR))
break;
case GNUNET_OS_IPK_LIBDIR:
if (isbasedir)
- dirname =
- DIR_SEPARATOR_STR "lib" DIR_SEPARATOR_STR "gnunet" DIR_SEPARATOR_STR;
- else
- dirname = DIR_SEPARATOR_STR "gnunet" DIR_SEPARATOR_STR;
+ {
+ GNUNET_asprintf (&tmp,
+ "%s%s%s%s%s",
+ execpath,
+ DIR_SEPARATOR_STR "lib",
+ (NULL != multiarch) ? DIR_SEPARATOR_STR : "",
+ (NULL != multiarch) ? multiarch : "",
+ DIR_SEPARATOR_STR "gnunet" 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 "gnunet" DIR_SEPARATOR_STR;
+ GNUNET_asprintf (&tmp,
+ "%s%s",
+ execpath,
+ dirname);
+ }
+ if (8 == sizeof (void *))
+ {
+ dirname =
+ DIR_SEPARATOR_STR "lib64" DIR_SEPARATOR_STR "gnunet" 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 "gnunet" DIR_SEPARATOR_STR;
break;
case GNUNET_OS_IPK_DATADIR:
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 "gnunet" 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 "gnunet" 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 "gnunet" 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 "gnunet" DIR_SEPARATOR_STR \
+ "libexec" DIR_SEPARATOR_STR;
+ break;
default:
GNUNET_free (execpath);
return NULL;
}
- tmp = GNUNET_malloc (strlen (execpath) + strlen (dirname) + 1);
- sprintf (tmp, "%s%s", execpath, dirname);
+ GNUNET_asprintf (&tmp,
+ "%s%s",
+ execpath,
+ dirname);
GNUNET_free (execpath);
return tmp;
}
+/**
+ * Given the name of a gnunet-helper, gnunet-service or gnunet-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 *
+GNUNET_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;
+}
+
+
/**
* Check whether an executable exists and possibly
* if the suid bit is set on the file.
*
* @param binary the name of the file to check.
* W32: must not have an .exe suffix.
- * @return GNUNET_YES if the file is SUID,
- * GNUNET_NO if not SUID (but binary exists)
- * GNUNET_SYSERR on error (no such binary or not executable)
+ * @param check_suid input true if the binary should be checked for SUID (*nix)
+ * W32: checks if the program has sufficient privileges by executing this
+ * binary with the -d flag. -d omits a programs main loop and only
+ * executes all privileged operations in an binary.
+ * @param params parameters used for w32 privilege checking (can be NULL for != w32 )
+ * @return #GNUNET_YES if the file is SUID (*nix) or can be executed with current privileges (W32),
+ * #GNUNET_NO if not SUID (but binary exists),
+ * #GNUNET_SYSERR on error (no such binary or not executable)
*/
int
-GNUNET_OS_check_helper_binary (const char *binary)
+GNUNET_OS_check_helper_binary (const char *binary,
+ int check_suid,
+ const char *params)
{
struct stat statbuf;
char *p;
char *pf;
#ifdef MINGW
- SOCKET rawsock;
char *binaryexe;
GNUNET_asprintf (&binaryexe, "%s.exe", binary);
#endif
if (NULL == p)
{
- LOG (GNUNET_ERROR_TYPE_INFO, _("Could not find binary `%s' in PATH!\n"),
+ LOG (GNUNET_ERROR_TYPE_INFO,
+ _("Could not find binary `%s' in PATH!\n"),
binary);
return GNUNET_SYSERR;
}
GNUNET_free (p);
return GNUNET_SYSERR;
}
+ if (check_suid){
#ifndef MINGW
- if ((0 != (statbuf.st_mode & S_ISUID)) && (0 == statbuf.st_uid))
- {
- GNUNET_free (p);
- return GNUNET_YES;
- }
- /* binary exists, but not SUID */
- GNUNET_free (p);
- return GNUNET_NO;
-#else
- GNUNET_free (p);
- {
- static int once; /* remember result from previous runs... */
-
- if (0 == once)
+ if ((0 != (statbuf.st_mode & S_ISUID)) && (0 == statbuf.st_uid))
{
- rawsock = socket (AF_INET, SOCK_RAW, IPPROTO_ICMP);
- if (INVALID_SOCKET == rawsock)
- {
- DWORD err = GetLastError ();
-
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "socket (AF_INET, SOCK_RAW, IPPROTO_ICMP) failed! GLE = %d\n", err);
- once = -1;
- return GNUNET_NO; /* not running as administrator */
- }
- once = 1;
- closesocket (rawsock);
+ GNUNET_free (p);
+ return GNUNET_YES;
}
- if (-1 == once)
- return GNUNET_NO;
- return GNUNET_YES;
- }
+ /* binary exists, but not SUID */
+#else
+ STARTUPINFO start;
+ char parameters[512];
+ PROCESS_INFORMATION proc;
+ DWORD exit_value;
+
+ GNUNET_snprintf (parameters,
+ sizeof (parameters),
+ "-d %s", params);
+ memset (&start, 0, sizeof (start));
+ start.cb = sizeof (start);
+ memset (&proc, 0, sizeof (proc));
+
+
+ // Start the child process.
+ if ( ! (CreateProcess( p, // current windows (2k3 and up can handle / instead of \ in paths))
+ parameters, // execute dryrun/priviliege checking mode
+ NULL, // Process handle not inheritable
+ NULL, // Thread handle not inheritable
+ FALSE, // Set handle inheritance to FALSE
+ CREATE_DEFAULT_ERROR_MODE, // No creation flags
+ NULL, // Use parent's environment block
+ NULL, // Use parent's starting directory
+ &start, // Pointer to STARTUPINFO structure
+ &proc ) // Pointer to PROCESS_INFORMATION structure
+ ))
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ _("CreateProcess failed for binary %s (%d).\n"),
+ p, GetLastError());
+ return GNUNET_SYSERR;
+ }
+
+ // Wait until child process exits.
+ WaitForSingleObject( proc.hProcess, INFINITE );
+
+ if ( ! GetExitCodeProcess (proc.hProcess, &exit_value)){
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ _("GetExitCodeProcess failed for binary %s (%d).\n"),
+ p, GetLastError() );
+ return GNUNET_SYSERR;
+ }
+ // Close process and thread handles.
+ CloseHandle( proc.hProcess );
+ CloseHandle( proc.hThread );
+
+ if (!exit_value)
+ return GNUNET_YES;
#endif
+ }
+ GNUNET_free (p);
+ return GNUNET_NO;
}
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