* @brief get paths used by the program
* @author Milan
*/
-
-#ifdef __cplusplus
-extern "C"
-{
-#if 0 /* keep Emacsens' auto-indent happy */
-}
-#endif
-#endif
-
#include <sys/stat.h>
#include <stdlib.h>
#include <string.h>
#include "gnunet_configuration_lib.h"
#include "gnunet_disk_lib.h"
#include "gnunet_os_lib.h"
-#if OSX
+#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 fn[64];
- char *line;
- char *dir;
+ char line[1024];
+ char dir[1024];
FILE *f;
+ char *lgu;
- GNUNET_snprintf (fn, 64, "/proc/%u/maps", getpid ());
- line = GNUNET_malloc (1024);
- dir = GNUNET_malloc (1024);
- f = fopen (fn, "r");
- if (f != NULL)
+ GNUNET_snprintf (fn, sizeof (fn), "/proc/%u/maps", getpid ());
+ 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"))))
{
- while (NULL != fgets (line, 1024, f))
- {
- if ((1 == sscanf (line,
- "%*x-%*x %*c%*c%*c%*c %*x %*2u:%*2u %*u%*[ ]%s",
- dir)) && (NULL != strstr (dir, "libgnunetutil")))
- {
- strstr (dir, "libgnunetutil")[0] = '\0';
- fclose (f);
- GNUNET_free (line);
- return dir;
- }
- }
- fclose (f);
+ lgu[0] = '\0';
+ FCLOSE (f);
+ return GNUNET_strdup (dir);
}
- GNUNET_free (dir);
- GNUNET_free (line);
+ }
+ FCLOSE (f);
return NULL;
}
+
/**
* Try to determine path by reading /proc/PID/exe
+ *
+ * @return NULL on error
*/
static char *
get_path_from_proc_exe ()
{
char fn[64];
- char *lnk;
- size_t size;
-
- GNUNET_snprintf (fn, 64, "/proc/%u/exe", getpid ());
- lnk = GNUNET_malloc (1024);
- size = readlink (fn, lnk, 1023);
- if ((size == 0) || (size >= 1024))
- {
- GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "readlink", fn);
- GNUNET_free (lnk);
- return NULL;
- }
+ char lnk[1024];
+ ssize_t size;
+
+ GNUNET_snprintf (fn, sizeof (fn), "/proc/%u/exe", getpid ());
+ size = readlink (fn, lnk, sizeof (lnk) - 1);
+ if (size <= 0)
+ {
+ 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--;
if ((size < 4) || (lnk[size - 4] != '/'))
- {
- /* not installed in "/bin/" -- binary path probably useless */
- GNUNET_free (lnk);
- return NULL;
- }
+ {
+ /* not installed in "/bin/" -- binary path probably useless */
+ return NULL;
+ }
lnk[size] = '\0';
- return lnk;
+ return GNUNET_strdup (lnk);
}
#endif
#if WINDOWS
/**
* Try to determine path with win32-specific function
+ *
+ * @return NULL on error
*/
static char *
get_path_from_module_filename ()
{
- char *path;
- char *idx;
+ wchar_t path[4097];
+ char upath[4097];
+ wchar_t *idx;
- path = GNUNET_malloc (4097);
- GetModuleFileName (NULL, path, 4096);
- idx = path + strlen (path);
- while ((idx > path) && (*idx != '\\') && (*idx != '/'))
+ GetModuleFileNameW (NULL, path, sizeof (path) - 1);
+ idx = path + wcslen (path);
+ while ((idx > path) && (*idx != L'\\') && (*idx != L'/'))
idx--;
- *idx = '\0';
- return path;
+ *idx = L'\0';
+ upath[0] = '\0';
+ WideCharToMultiByte (CP_UTF8, 0, path, -1, upath, 4097, NULL, NULL);
+
+ return GNUNET_strdup (upath);
}
#endif
-#if OSX
+#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)
- {
- GNUNET_free (path);
- return NULL;
- }
+ if (0 != func (path, &len))
+ {
+ GNUNET_free (path);
+ return NULL;
+ }
len = strlen (path);
while ((path[len] != '/') && (len > 0))
len--;
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;
- }
- }
- return p;
+ {
+ 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 NULL;
}
#endif
+
+/**
+ * Return the actual path to a file found in the current
+ * PATH environment variable.
+ *
+ * @param binary the name of the file to find
+ * @return path to binary, NULL if not found
+ */
static char *
-get_path_from_PATH ()
+get_path_from_PATH (const char *binary)
{
char *path;
char *pos;
char *end;
char *buf;
const char *p;
- size_t size;
- 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);
- size = strlen (path);
+#endif
+ buf = GNUNET_malloc (strlen (path) + strlen (binary) + 1 + 1);
pos = path;
-
- while (NULL != (end = strchr (pos, ':')))
- {
- *end = '\0';
- sprintf (buf, "%s/%s", pos, "gnunetd");
- if (GNUNET_DISK_file_test (buf) == GNUNET_YES)
- {
- pos = GNUNET_strdup (pos);
- GNUNET_free (buf);
- GNUNET_free (path);
- return pos;
- }
- pos = end + 1;
- }
- sprintf (buf, "%s/%s", pos, "gnunetd");
- if (GNUNET_DISK_file_test (buf) == GNUNET_YES)
+ while (NULL != (end = strchr (pos, PATH_SEPARATOR)))
+ {
+ *end = '\0';
+ sprintf (buf, "%s/%s", pos, binary);
+ if (GNUNET_DISK_file_test (buf) == GNUNET_YES)
{
pos = GNUNET_strdup (pos);
GNUNET_free (buf);
GNUNET_free (path);
return pos;
}
+ pos = end + 1;
+ }
+ sprintf (buf, "%s/%s", pos, binary);
+ if (GNUNET_YES == GNUNET_DISK_file_test (buf))
+ {
+ pos = GNUNET_strdup (pos);
+ GNUNET_free (buf);
+ GNUNET_free (path);
+ return pos;
+ }
GNUNET_free (buf);
GNUNET_free (path);
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 OSX
- ret = get_path_from_dyld_image ();
- if (ret != NULL)
+#if DARWIN
+ 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 ();
- if (ret != NULL)
+ if (NULL != (ret = get_path_from_PATH ("gnunet-arm")))
return ret;
/* other attempts here */
+ 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;
#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 OSX
- ret = get_path_from_NSGetExecutablePath ();
- if (ret != NULL)
+#if DARWIN
+ if (NULL != (ret = get_path_from_NSGetExecutablePath ()))
return ret;
#endif
/* other attempts here */
}
-
/**
* @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)
- {
- /* should never happen, but better safe than sorry */
- GNUNET_free (execpath);
- return NULL;
- }
+ 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;
if ((n > 5) &&
((0 == strcasecmp (&execpath[n - 5], "lib32")) ||
(0 == strcasecmp (&execpath[n - 5], "lib64"))))
+ {
+ if (GNUNET_OS_IPK_LIBDIR != dirkind)
{
- if (dirkind != GNUNET_OS_IPK_LIBDIR)
- {
- /* strip '/lib32' or '/lib64' */
- execpath[n - 5] = '\0';
- n -= 5;
- }
- else
- isbasedir = 0;
+ /* strip '/lib32' or '/lib64' */
+ execpath[n - 5] = '\0';
+ n -= 5;
}
+ else
+ isbasedir = 0;
+ }
else if ((n > 3) &&
((0 == strcasecmp (&execpath[n - 3], "bin")) ||
(0 == strcasecmp (&execpath[n - 3], "lib"))))
- {
- /* strip '/bin' or '/lib' */
- execpath[n - 3] = '\0';
- n -= 3;
- }
+ {
+ /* strip '/bin' or '/lib' */
+ execpath[n - 3] = '\0';
+ n -= 3;
+ }
/* in case this was a directory named foo-bin, remove "foo-" */
while ((n > 1) && (execpath[n - 1] == DIR_SEPARATOR))
execpath[--n] = '\0';
switch (dirkind)
- {
- case GNUNET_OS_IPK_PREFIX:
- case GNUNET_OS_IPK_SELF_PREFIX:
- dirname = DIR_SEPARATOR_STR;
- break;
- case GNUNET_OS_IPK_BINDIR:
- dirname = DIR_SEPARATOR_STR "bin" DIR_SEPARATOR_STR;
- 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;
- break;
- case GNUNET_OS_IPK_DATADIR:
+ {
+ case GNUNET_OS_IPK_PREFIX:
+ case GNUNET_OS_IPK_SELF_PREFIX:
+ dirname = DIR_SEPARATOR_STR;
+ break;
+ case GNUNET_OS_IPK_BINDIR:
+ dirname = DIR_SEPARATOR_STR "bin" DIR_SEPARATOR_STR;
+ break;
+ case GNUNET_OS_IPK_LIBDIR:
+ if (isbasedir)
dirname =
- DIR_SEPARATOR_STR "share" DIR_SEPARATOR_STR "gnunet"
- DIR_SEPARATOR_STR;
- break;
- case GNUNET_OS_IPK_LOCALEDIR:
- dirname =
- DIR_SEPARATOR_STR "share" DIR_SEPARATOR_STR "locale"
- DIR_SEPARATOR_STR;
- break;
- default:
- GNUNET_free (execpath);
- return NULL;
- }
+ DIR_SEPARATOR_STR "lib" DIR_SEPARATOR_STR "gnunet" DIR_SEPARATOR_STR;
+ else
+ dirname = DIR_SEPARATOR_STR "gnunet" DIR_SEPARATOR_STR;
+ break;
+ case GNUNET_OS_IPK_DATADIR:
+ dirname =
+ DIR_SEPARATOR_STR "share" DIR_SEPARATOR_STR "gnunet" 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;
+ default:
+ GNUNET_free (execpath);
+ return NULL;
+ }
tmp = GNUNET_malloc (strlen (execpath) + strlen (dirname) + 1);
sprintf (tmp, "%s%s", execpath, dirname);
GNUNET_free (execpath);
return tmp;
}
-#if 0 /* keep Emacsens' auto-indent happy */
+
+/**
+ * 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.
+ * 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)
+ */
+int
+GNUNET_OS_check_helper_binary (const char *binary)
{
+ struct stat statbuf;
+ char *p;
+ char *pf;
+#ifdef MINGW
+ SOCKET rawsock;
+ char *binaryexe;
+
+ GNUNET_asprintf (&binaryexe, "%s.exe", binary);
+ if ( (GNUNET_YES == GNUNET_STRINGS_path_is_absolute (binaryexe, GNUNET_NO,
+ NULL, NULL)) ||
+ (0 == strncmp (binary, "./", 2)) )
+ p = GNUNET_strdup (binaryexe);
+ else
+ {
+ p = get_path_from_PATH (binaryexe);
+ if (NULL != p)
+ {
+ GNUNET_asprintf (&pf, "%s/%s", p, binaryexe);
+ GNUNET_free (p);
+ p = pf;
+ }
+ }
+ GNUNET_free (binaryexe);
+#else
+ if ( (GNUNET_YES == GNUNET_STRINGS_path_is_absolute (binary, GNUNET_NO,
+ NULL, NULL)) ||
+ (0 == strncmp (binary, "./", 2)) )
+ p = GNUNET_strdup (binary);
+ else
+ {
+ p = get_path_from_PATH (binary);
+ if (NULL != p)
+ {
+ GNUNET_asprintf (&pf, "%s/%s", p, binary);
+ GNUNET_free (p);
+ p = pf;
+ }
+ }
#endif
-#ifdef __cplusplus
-}
+ if (NULL == p)
+ {
+ LOG (GNUNET_ERROR_TYPE_INFO, _("Could not find binary `%s' in PATH!\n"),
+ binary);
+ return GNUNET_SYSERR;
+ }
+ if (0 != ACCESS (p, X_OK))
+ {
+ LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_WARNING, "access", p);
+ GNUNET_free (p);
+ return GNUNET_SYSERR;
+ }
+#ifndef MINGW
+ if (0 == getuid ())
+ {
+ /* as we run as root, we don't insist on SUID */
+ GNUNET_free (p);
+ return GNUNET_OK;
+ }
+#endif
+ if (0 != STAT (p, &statbuf))
+ {
+ LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_WARNING, "stat", p);
+ GNUNET_free (p);
+ return GNUNET_SYSERR;
+ }
+#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)
+ {
+ 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;
+ }
#endif
-/* end of installpath.c */
+}
+
+
+/* end of os_installation.c */
projects / oweals / gnunet.git / blobdiff