#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"
#if DARWIN
#include <mach-o/ldsyms.h>
#include <mach-o/dyld.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
+ *
+ * @return NULL on error
*/
static char *
get_path_from_proc_maps ()
char *lgu;
GNUNET_snprintf (fn, sizeof (fn), "/proc/%u/maps", getpid ());
- f = fopen (fn, "r");
- if (f == NULL)
+ if (NULL == (f = FOPEN (fn, "r")))
return NULL;
while (NULL != fgets (line, sizeof (line), f))
{
- if ((1 == sscanf (line,
- "%*x-%*x %*c%*c%*c%*c %*x %*2u:%*2u %*u%*[ ]%s",
- dir)) && (NULL != (lgu = strstr (dir, "libgnunetutil"))))
+ if ((1 ==
+ SSCANF (line, "%*x-%*x %*c%*c%*c%*c %*x %*2u:%*2u %*u%*[ ]%1023s", dir)) &&
+ (NULL != (lgu = strstr (dir, "libgnunetutil"))))
{
lgu[0] = '\0';
- fclose (f);
+ FCLOSE (f);
return GNUNET_strdup (dir);
}
}
- fclose (f);
+ FCLOSE (f);
return NULL;
}
+
/**
* Try to determine path by reading /proc/PID/exe
+ *
+ * @return NULL on error
*/
static char *
get_path_from_proc_exe ()
size = readlink (fn, lnk, sizeof (lnk) - 1);
if (size <= 0)
{
- GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "readlink", fn);
+ LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_ERROR, "readlink", fn);
return NULL;
}
GNUNET_assert (size < sizeof (lnk));
lnk[size] = '\0';
while ((lnk[size] != '/') && (size > 0))
size--;
+ /* test for being in lib/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
+ *
+ * @return NULL on error
*/
static char *
get_path_from_module_filename ()
{
- char path[4097];
- char *idx;
-
- GetModuleFileName (NULL, path, sizeof (path) - 1);
- idx = path + strlen (path);
- while ((idx > path) && (*idx != '\\') && (*idx != '/'))
+ size_t pathlen = 512;
+ DWORD real_pathlen;
+ wchar_t *idx;
+ 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_abort ();
+ /* To be safe */
+ modulepath[real_pathlen] = '\0';
+
+ idx = modulepath + real_pathlen;
+ while ((idx > modulepath) && (*idx != L'\\') && (*idx != L'/'))
idx--;
- *idx = '\0';
- return GNUNET_strdup (path);
+ *idx = L'\0';
+
+ /* 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_abort ();
+
+ 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.
+ *
+ * @param buf where to write the path
+ * @param number of bytes available in 'buf'
+ * @return 0 on success, otherwise desired number of bytes is stored in 'bufsize'
+ */
typedef int (*MyNSGetExecutablePathProto) (char *buf, size_t * bufsize);
+
+/**
+ * Try to obtain the path of our executable using '_NSGetExecutablePath'.
+ *
+ * @return NULL on error
+ */
static char *
get_path_from_NSGetExecutablePath ()
{
char *path;
size_t len;
MyNSGetExecutablePathProto func;
- int ret;
path = NULL;
- func =
- (MyNSGetExecutablePathProto) dlsym (RTLD_DEFAULT, "_NSGetExecutablePath");
- if (!func)
+ if (NULL == (func =
+ (MyNSGetExecutablePathProto) dlsym (RTLD_DEFAULT, "_NSGetExecutablePath")))
return NULL;
path = &zero;
len = 0;
/* get the path len, including the trailing \0 */
- func (path, &len);
- if (len == 0)
+ (void) func (path, &len);
+ if (0 == len)
return NULL;
path = GNUNET_malloc (len);
- ret = func (path, &len);
- if (ret != 0)
+ if (0 != func (path, &len))
{
GNUNET_free (path);
return NULL;
return path;
}
+
+/**
+ * Try to obtain the path of our executable using '_dyld_image' API.
+ *
+ * @return NULL on error
+ */
static char *
get_path_from_dyld_image ()
{
const char *path;
- char *p, *s;
- int i;
+ char *p;
+ char *s;
+ 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 (path != NULL && strlen (path) > 0)
- {
- p = strdup (path);
- s = p + strlen (p);
- while ((s > p) && (*s != '/'))
- s--;
- s++;
- *s = '\0';
- }
- break;
- }
+ if (_dyld_get_image_header (i) != &_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
+
/**
* Return the actual path to a file found in the current
* PATH environment variable.
char *buf;
const char *p;
- p = getenv ("PATH");
- if (p == NULL)
+ if (NULL == (p = getenv ("PATH")))
return NULL;
+#if WINDOWS
+ /* On W32 look in CWD first. */
+ GNUNET_asprintf (&path, ".%c%s", PATH_SEPARATOR, p);
+#else
path = GNUNET_strdup (p); /* because we write on it */
- buf = GNUNET_malloc (strlen (path) + 20);
+#endif
+ buf = GNUNET_malloc (strlen (path) + strlen (binary) + 1 + 1);
pos = path;
while (NULL != (end = strchr (pos, PATH_SEPARATOR)))
{
pos = end + 1;
}
sprintf (buf, "%s/%s", pos, binary);
- if (GNUNET_DISK_file_test (buf) == GNUNET_YES)
+ if (GNUNET_YES == GNUNET_DISK_file_test (buf))
{
pos = GNUNET_strdup (pos);
GNUNET_free (buf);
return NULL;
}
+
+/**
+ * Try to obtain the installation path using the "GNUNET_PREFIX" environment
+ * variable.
+ *
+ * @return NULL on error (environment variable not set)
+ */
static char *
get_path_from_GNUNET_PREFIX ()
{
const char *p;
- p = getenv ("GNUNET_PREFIX");
- if (p != NULL)
+ if (NULL != (p = getenv ("GNUNET_PREFIX")))
return GNUNET_strdup (p);
return NULL;
}
-/*
+
+/**
* @brief get the path to GNUnet bin/ or lib/, prefering the lib/ path
* @author Milan
*
{
char *ret;
- ret = get_path_from_GNUNET_PREFIX ();
- if (ret != NULL)
+ if (NULL != (ret = get_path_from_GNUNET_PREFIX ()))
return ret;
#if LINUX
- ret = get_path_from_proc_maps ();
- if (ret != NULL)
+ if (NULL != (ret = get_path_from_proc_maps ()))
return ret;
- ret = get_path_from_proc_exe ();
- if (ret != NULL)
+ if (NULL != (ret = get_path_from_proc_exe ()))
return ret;
#endif
#if WINDOWS
- ret = get_path_from_module_filename ();
- if (ret != NULL)
+ if (NULL != (ret = get_path_from_module_filename ()))
return ret;
#endif
#if DARWIN
- ret = get_path_from_dyld_image ();
- if (ret != NULL)
+ if (NULL != (ret = get_path_from_dyld_image ()))
return ret;
- ret = get_path_from_NSGetExecutablePath ();
- if (ret != NULL)
+ if (NULL != (ret = get_path_from_NSGetExecutablePath ()))
return ret;
#endif
- ret = get_path_from_PATH ("gnunet-arm");
- if (ret != NULL)
+ if (NULL != (ret = get_path_from_PATH ("gnunet-arm")))
return ret;
/* other attempts here */
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- _
- ("Could not determine installation path for %s. Set `%s' environment variable.\n"),
- "GNUnet", "GNUNET_PREFIX");
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ _
+ ("Could not determine installation path for %s. Set `%s' environment variable.\n"),
+ "GNUnet", "GNUNET_PREFIX");
return NULL;
}
-/*
+
+/**
* @brief get the path to current app's bin/
* @author Milan
*
{
char *ret;
- ret = NULL;
#if LINUX
- ret = get_path_from_proc_exe ();
- if (ret != NULL)
+ if (NULL != (ret = get_path_from_proc_exe ()))
return ret;
#endif
#if WINDOWS
- ret = get_path_from_module_filename ();
- if (ret != NULL)
+ if (NULL != (ret = get_path_from_module_filename ()))
return ret;
#endif
#if DARWIN
- ret = get_path_from_NSGetExecutablePath ();
- if (ret != NULL)
+ if (NULL != (ret = get_path_from_NSGetExecutablePath ()))
return ret;
#endif
/* other attempts here */
- return ret;
+ return NULL;
}
-
/**
* @brief get the path to a specific GNUnet installation directory or,
* with GNUNET_IPK_SELF_PREFIX, the current running apps installation directory
/* try to get GNUnet's bin/ or lib/, or if previous was unsuccessful some
* guess for the current app */
- if (execpath == NULL)
+ if (NULL == execpath)
execpath = os_get_gnunet_path ();
- if (execpath == NULL)
+ if (NULL == execpath)
return NULL;
n = strlen (execpath);
- if (n == 0)
+ if (0 == n)
{
/* should never happen, but better safe than sorry */
GNUNET_free (execpath);
return NULL;
}
/* remove filename itself */
- while ((n > 1) && (execpath[n - 1] == DIR_SEPARATOR))
+ while ((n > 1) && (DIR_SEPARATOR == execpath[n - 1]))
execpath[--n] = '\0';
isbasedir = 1;
((0 == strcasecmp (&execpath[n - 5], "lib32")) ||
(0 == strcasecmp (&execpath[n - 5], "lib64"))))
{
- if (dirkind != GNUNET_OS_IPK_LIBDIR)
+ if (GNUNET_OS_IPK_LIBDIR != dirkind)
{
/* strip '/lib32' or '/lib64' */
execpath[n - 5] = '\0';
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:
+ dirname =
+ DIR_SEPARATOR_STR "lib" DIR_SEPARATOR_STR "gnunet" DIR_SEPARATOR_STR \
+ "libexec" DIR_SEPARATOR_STR;
+ break;
default:
GNUNET_free (execpath);
return NULL;
}
+/**
+ * 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)
+{
+ char *libexecdir;
+ char *binary;
+
+ if (DIR_SEPARATOR == progname[0])
+ return GNUNET_strdup (progname);
+ libexecdir = GNUNET_OS_installation_get_path (GNUNET_OS_IPK_LIBEXECDIR);
+ if (NULL == libexecdir)
+ return GNUNET_strdup (progname);
+ GNUNET_asprintf (&binary,
+ "%s%s",
+ libexecdir,
+ progname);
+ GNUNET_free (libexecdir);
+ return binary;
+}
+
+
/**
* Check whether an executable exists and possibly
* if the suid bit is set on the file.
* Attempts to find the file using the current
* PATH environment variable as a search path.
*
- * @param binary the name of the file to check
- * @return GNUNET_YES if the file is SUID,
+ * @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)
*/
struct stat statbuf;
char *p;
char *pf;
-
#ifdef MINGW
SOCKET rawsock;
char *binaryexe;
GNUNET_asprintf (&binaryexe, "%s.exe", binary);
- p = get_path_from_PATH (binaryexe);
- if (p != NULL)
+ if ( (GNUNET_YES == GNUNET_STRINGS_path_is_absolute (binaryexe, GNUNET_NO,
+ NULL, NULL)) ||
+ (0 == strncmp (binary, "./", 2)) )
+ p = GNUNET_strdup (binaryexe);
+ else
{
- GNUNET_asprintf (&pf, "%s/%s", p, binaryexe);
- GNUNET_free (p);
- p = pf;
+ p = get_path_from_PATH (binaryexe);
+ if (NULL != p)
+ {
+ GNUNET_asprintf (&pf, "%s/%s", p, binaryexe);
+ GNUNET_free (p);
+ p = pf;
+ }
}
- free (binaryexe);
+ GNUNET_free (binaryexe);
#else
- p = get_path_from_PATH (binary);
- if (p != NULL)
+ if ( (GNUNET_YES == GNUNET_STRINGS_path_is_absolute (binary, GNUNET_NO,
+ NULL, NULL)) ||
+ (0 == strncmp (binary, "./", 2)) )
+ p = GNUNET_strdup (binary);
+ else
{
- GNUNET_asprintf (&pf, "%s/%s", p, binary);
- GNUNET_free (p);
- p = pf;
+ p = get_path_from_PATH (binary);
+ if (NULL != p)
+ {
+ GNUNET_asprintf (&pf, "%s/%s", p, binary);
+ GNUNET_free (p);
+ p = pf;
+ }
}
#endif
- if (p == NULL)
+ if (NULL == p)
{
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- _("Could not find binary `%s' in PATH!\n"), binary);
+ LOG (GNUNET_ERROR_TYPE_INFO, _("Could not find binary `%s' in PATH!\n"),
+ binary);
return GNUNET_SYSERR;
}
- if (0 != STAT (p, &statbuf))
+ if (0 != ACCESS (p, X_OK))
{
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("stat (%s) failed: %s\n"), p, STRERROR (errno));
+ LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_WARNING, "access", p);
GNUNET_free (p);
return GNUNET_SYSERR;
}
#ifndef MINGW
- if ((0 != (statbuf.st_mode & S_ISUID)) && (statbuf.st_uid == 0))
+ if (0 == getuid ())
{
+ /* as we run as root, we don't insist on SUID */
GNUNET_free (p);
- return GNUNET_YES;
+ return GNUNET_OK;
+ }
+#endif
+ if (0 != STAT (p, &statbuf))
+ {
+ LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_WARNING, "stat", p);
+ GNUNET_free (p);
+ return GNUNET_SYSERR;
}
- if (0 == ACCESS (p, X_OK))
+#ifndef MINGW
+ if ((0 != (statbuf.st_mode & S_ISUID)) && (0 == statbuf.st_uid))
{
GNUNET_free (p);
- return GNUNET_NO;
+ return GNUNET_YES;
}
+ /* binary exists, but not SUID */
GNUNET_free (p);
- return GNUNET_SYSERR;
+ return GNUNET_NO;
#else
GNUNET_free (p);
- rawsock = socket (AF_INET, SOCK_RAW, IPPROTO_ICMP);
- if (INVALID_SOCKET == rawsock)
{
- DWORD err = GetLastError ();
+ static int once; /* remember result from previous runs... */
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- "socket (AF_INET, SOCK_RAW, IPPROTO_ICMP) failed! GLE = %d\n",
- err);
- return GNUNET_NO; /* not running as administrator */
+ if (0 == once)
+ {
+ 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);
+ }
+ if (-1 == once)
+ return GNUNET_NO;
+ return GNUNET_YES;
}
- closesocket (rawsock);
- return GNUNET_YES;
#endif
}
projects / oweals / gnunet.git / blobdiff