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- /*
- This file is part of GNUnet.
- Copyright (C) 2006-2018 GNUnet e.V.
- GNUnet is free software: you can redistribute it and/or modify it
- under the terms of the GNU Affero General Public License as published
- by the Free Software Foundation, either version 3 of the License,
- or (at your option) any later version.
- GNUnet is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Affero General Public License for more details.
- You should have received a copy of the GNU Affero General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
- SPDX-License-Identifier: AGPL3.0-or-later
- */
- /**
- * @file src/util/os_installation.c
- * @brief get paths used by the program
- * @author Milan
- * @author Christian Fuchs
- * @author Christian Grothoff
- * @author Matthias Wachs
- * @author Heikki Lindholm
- * @author LRN
- */
- #include <sys/stat.h>
- #include <stdlib.h>
- #include <string.h>
- #include <unistd.h>
- #include <unistr.h> /* for u16_to_u8 */
- #include "platform.h"
- #include "gnunet_util_lib.h"
- #if DARWIN
- #include <mach-o/ldsyms.h>
- #include <mach-o/dyld.h>
- #endif
- #define LOG(kind, ...) \
- GNUNET_log_from (kind, "util-os-installation", __VA_ARGS__)
- #define LOG_STRERROR_FILE(kind, syscall, filename) \
- GNUNET_log_from_strerror_file (kind, \
- "util-os-installation", \
- syscall, \
- filename)
- /**
- * Default project data used for installation path detection
- * for GNUnet (core).
- */
- static const struct GNUNET_OS_ProjectData default_pd = {
- .libname = "libgnunetutil",
- .project_dirname = "gnunet",
- .binary_name = "gnunet-arm",
- .version = PACKAGE_VERSION " " VCS_VERSION,
- .env_varname = "GNUNET_PREFIX",
- .base_config_varname = "GNUNET_BASE_CONFIG",
- .bug_email = "gnunet-developers@gnu.org",
- .homepage = "http://www.gnu.org/s/gnunet/",
- .config_file = "gnunet.conf",
- .user_config_file = "~/.config/gnunet.conf",
- .is_gnu = 1,
- .gettext_domain = PACKAGE,
- .gettext_path = NULL,
- .agpl_url = GNUNET_AGPL_URL,
- };
- /**
- * Which project data do we currently use for installation
- * path detection? Never NULL.
- */
- static const struct GNUNET_OS_ProjectData *current_pd = &default_pd;
- /**
- * Whether or not gettext has been initialized for the library.
- * Note that the gettext initialization done within
- * GNUNET_PROGRAM_run2 is for the specific application.
- */
- static int gettextinit = 0;
- /**
- * Return default project data used by 'libgnunetutil' for GNUnet.
- */
- const struct GNUNET_OS_ProjectData *
- GNUNET_OS_project_data_default (void)
- {
- return &default_pd;
- }
- /**
- * @return current project data.
- */
- const struct GNUNET_OS_ProjectData *
- GNUNET_OS_project_data_get ()
- {
- if (0 == gettextinit)
- {
- char *path = GNUNET_OS_installation_get_path (GNUNET_OS_IPK_LOCALEDIR);
- if (NULL != path)
- bindtextdomain (PACKAGE, path);
- GNUNET_free (path);
- gettextinit = 1;
- }
- return current_pd;
- }
- /**
- * Setup OS subsystem with project data.
- *
- * @param pd project data used to determine paths
- */
- void
- GNUNET_OS_init (const struct GNUNET_OS_ProjectData *pd)
- {
- if (0 == gettextinit)
- {
- char *path = GNUNET_OS_installation_get_path (GNUNET_OS_IPK_LOCALEDIR);
- if (NULL != path)
- bindtextdomain (PACKAGE, path);
- GNUNET_free (path);
- gettextinit = 1;
- }
- GNUNET_assert (NULL != pd);
- current_pd = pd;
- }
- #ifdef __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[1024];
- char dir[1024];
- FILE *f;
- char *lgu;
- if (NULL == current_pd->libname)
- return 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 %*2x:%*2x %*u%*[ ]%1023s",
- dir)) &&
- (NULL != (lgu = strstr (dir, current_pd->libname))))
- {
- lgu[0] = '\0';
- fclose (f);
- return GNUNET_strdup (dir);
- }
- }
- 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[1024];
- ssize_t size;
- char *lep;
- 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_t) size) < sizeof(lnk));
- lnk[size] = '\0';
- while ((lnk[size] != '/') && (size > 0))
- size--;
- GNUNET_asprintf (&lep, "/%s/libexec/", current_pd->project_dirname);
- /* test for being in lib/gnunet/libexec/ or lib/MULTIARCH/gnunet/libexec */
- if ((((size_t) size) > strlen (lep)) &&
- (0 == strcmp (lep, &lnk[size - strlen (lep)])))
- size -= strlen (lep) - 1;
- GNUNET_free (lep);
- if ((size < 4) || (lnk[size - 4] != '/'))
- {
- /* not installed in "/bin/" -- binary path probably useless */
- return NULL;
- }
- lnk[size] = '\0';
- return GNUNET_strdup (lnk);
- }
- #endif
- #if DARWIN
- /**
- * Signature of the '_NSGetExecutablePath" function.
- *
- * @param buf where to write the path
- * @param number of bytes available in @a 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 ()
- {
- static char zero = '\0';
- char *path;
- size_t len;
- MyNSGetExecutablePathProto func;
- path = NULL;
- if (NULL ==
- (func = (MyNSGetExecutablePathProto) dlsym (RTLD_DEFAULT,
- "_NSGetExecutablePath")))
- return NULL;
- path = &zero;
- len = 0;
- /* get the path len, including the trailing \0 */
- (void) func (path, &len);
- if (0 == len)
- return NULL;
- path = GNUNET_malloc (len);
- if (0 != func (path, &len))
- {
- GNUNET_free (path);
- return NULL;
- }
- len = strlen (path);
- while ((path[len] != '/') && (len > 0))
- len--;
- path[len] = '\0';
- 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;
- char *s;
- unsigned int i;
- int c;
- c = _dyld_image_count ();
- for (i = 0; i < c; i++)
- {
- 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 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 (const char *binary)
- {
- char *path;
- char *pos;
- char *end;
- char *buf;
- const char *p;
- if (NULL == (p = getenv ("PATH")))
- return NULL;
- path = GNUNET_strdup (p); /* because we write on it */
- buf = GNUNET_malloc (strlen (path) + strlen (binary) + 1 + 1);
- pos = path;
- 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;
- if ((NULL != current_pd->env_varname) &&
- (NULL != (p = getenv (current_pd->env_varname))))
- return GNUNET_strdup (p);
- if ((NULL != current_pd->env_varname_alt) &&
- (NULL != (p = getenv (current_pd->env_varname_alt))))
- return GNUNET_strdup (p);
- return NULL;
- }
- /**
- * @brief get the path to GNUnet bin/ or lib/, preferring the lib/ path
- * @author Milan
- *
- * @return a pointer to the executable path, or NULL on error
- */
- static char *
- os_get_gnunet_path ()
- {
- char *ret;
- if (NULL != (ret = get_path_from_GNUNET_PREFIX ()))
- return ret;
- #ifdef __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 != current_pd->binary_name) &&
- (NULL != (ret = get_path_from_PATH (current_pd->binary_name))))
- return ret;
- if (NULL != (ret = get_path_from_proc_exe ()))
- return ret;
- #endif
- #if DARWIN
- if (NULL != (ret = get_path_from_dyld_image ()))
- return ret;
- if (NULL != (ret = get_path_from_NSGetExecutablePath ()))
- return ret;
- #endif
- if ((NULL != current_pd->binary_name) &&
- (NULL != (ret = get_path_from_PATH (current_pd->binary_name))))
- return ret;
- /* other attempts here */
- LOG (GNUNET_ERROR_TYPE_ERROR,
- _ (
- "Could not determine installation path for %s. Set `%s' environment variable.\n"),
- current_pd->project_dirname,
- current_pd->env_varname);
- return NULL;
- }
- /**
- * @brief get the path to current app's bin/
- * @return a pointer to the executable path, or NULL on error
- */
- static char *
- os_get_exec_path ()
- {
- char *ret = NULL;
- #ifdef __linux__
- if (NULL != (ret = get_path_from_proc_exe ()))
- return ret;
- #endif
- #if DARWIN
- if (NULL != (ret = get_path_from_NSGetExecutablePath ()))
- return ret;
- #endif
- /* other attempts here */
- return ret;
- }
- /**
- * @brief get the path to a specific GNUnet installation directory or,
- * with #GNUNET_OS_IPK_SELF_PREFIX, the current running apps installation directory
- * @return a pointer to the dir path (to be freed by the caller)
- */
- char *
- GNUNET_OS_installation_get_path (enum GNUNET_OS_InstallationPathKind dirkind)
- {
- size_t n;
- char *dirname;
- char *execpath = NULL;
- char *tmp;
- char *multiarch;
- char *libdir;
- int isbasedir;
- /* if wanted, try to get the current app's bin/ */
- if (dirkind == GNUNET_OS_IPK_SELF_PREFIX)
- execpath = os_get_exec_path ();
- /* try to get GNUnet's bin/ or lib/, or if previous was unsuccessful some
- * guess for the current app */
- if (NULL == execpath)
- execpath = os_get_gnunet_path ();
- if (NULL == execpath)
- return NULL;
- n = strlen (execpath);
- if (0 == n)
- {
- /* should never happen, but better safe than sorry */
- GNUNET_free (execpath);
- return NULL;
- }
- /* remove filename itself */
- while ((n > 1) && (DIR_SEPARATOR == execpath[n - 1]))
- execpath[--n] = '\0';
- isbasedir = 1;
- if ((n > 6) && ((0 == strcasecmp (&execpath[n - 6], "/lib32")) ||
- (0 == strcasecmp (&execpath[n - 6], "/lib64"))))
- {
- if ((GNUNET_OS_IPK_LIBDIR != dirkind) &&
- (GNUNET_OS_IPK_LIBEXECDIR != dirkind))
- {
- /* strip '/lib32' or '/lib64' */
- execpath[n - 6] = '\0';
- n -= 6;
- }
- else
- isbasedir = 0;
- }
- else if ((n > 4) && ((0 == strcasecmp (&execpath[n - 4], "/bin")) ||
- (0 == strcasecmp (&execpath[n - 4], "/lib"))))
- {
- /* strip '/bin' or '/lib' */
- 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))
- execpath[--n] = '\0';
- switch (dirkind)
- {
- case GNUNET_OS_IPK_PREFIX:
- case GNUNET_OS_IPK_SELF_PREFIX:
- dirname = GNUNET_strdup (DIR_SEPARATOR_STR);
- break;
- case GNUNET_OS_IPK_BINDIR:
- dirname = GNUNET_strdup (DIR_SEPARATOR_STR "bin" DIR_SEPARATOR_STR);
- break;
- case GNUNET_OS_IPK_LIBDIR:
- if (isbasedir)
- {
- GNUNET_asprintf (&tmp,
- "%s%s%s%s%s%s%s",
- execpath,
- DIR_SEPARATOR_STR "lib",
- (NULL != multiarch) ? DIR_SEPARATOR_STR : "",
- (NULL != multiarch) ? multiarch : "",
- DIR_SEPARATOR_STR,
- current_pd->project_dirname,
- DIR_SEPARATOR_STR);
- if (GNUNET_YES == GNUNET_DISK_directory_test (tmp, GNUNET_YES))
- {
- GNUNET_free (execpath);
- return tmp;
- }
- GNUNET_free (tmp);
- tmp = NULL;
- dirname = NULL;
- if (4 == sizeof(void *))
- {
- GNUNET_asprintf (&dirname,
- DIR_SEPARATOR_STR "lib32" DIR_SEPARATOR_STR
- "%s" DIR_SEPARATOR_STR,
- current_pd->project_dirname);
- GNUNET_asprintf (&tmp, "%s%s", execpath, dirname);
- }
- if (8 == sizeof(void *))
- {
- GNUNET_asprintf (&dirname,
- DIR_SEPARATOR_STR "lib64" DIR_SEPARATOR_STR
- "%s" DIR_SEPARATOR_STR,
- current_pd->project_dirname);
- GNUNET_asprintf (&tmp, "%s%s", execpath, dirname);
- }
- if ((NULL != tmp) &&
- (GNUNET_YES == GNUNET_DISK_directory_test (tmp, GNUNET_YES)))
- {
- GNUNET_free (execpath);
- GNUNET_free (dirname);
- return tmp;
- }
- GNUNET_free (tmp);
- GNUNET_free (dirname);
- }
- GNUNET_asprintf (&dirname,
- DIR_SEPARATOR_STR "%s" DIR_SEPARATOR_STR,
- current_pd->project_dirname);
- break;
- case GNUNET_OS_IPK_DATADIR:
- GNUNET_asprintf (&dirname,
- DIR_SEPARATOR_STR "share" DIR_SEPARATOR_STR
- "%s" DIR_SEPARATOR_STR,
- current_pd->project_dirname);
- break;
- case GNUNET_OS_IPK_LOCALEDIR:
- dirname = GNUNET_strdup (DIR_SEPARATOR_STR "share" DIR_SEPARATOR_STR
- "locale" DIR_SEPARATOR_STR);
- break;
- case GNUNET_OS_IPK_ICONDIR:
- dirname = GNUNET_strdup (DIR_SEPARATOR_STR "share" DIR_SEPARATOR_STR
- "icons" DIR_SEPARATOR_STR);
- break;
- case GNUNET_OS_IPK_DOCDIR:
- GNUNET_asprintf (&dirname,
- DIR_SEPARATOR_STR "share" DIR_SEPARATOR_STR
- "doc" DIR_SEPARATOR_STR
- "%s" DIR_SEPARATOR_STR,
- current_pd->project_dirname);
- break;
- case GNUNET_OS_IPK_LIBEXECDIR:
- if (isbasedir)
- {
- GNUNET_asprintf (&dirname,
- DIR_SEPARATOR_STR "%s" DIR_SEPARATOR_STR
- "libexec" DIR_SEPARATOR_STR,
- current_pd->project_dirname);
- GNUNET_asprintf (&tmp,
- "%s%s%s%s",
- execpath,
- DIR_SEPARATOR_STR "lib" DIR_SEPARATOR_STR,
- (NULL != multiarch) ? multiarch : "",
- dirname);
- GNUNET_free (dirname);
- if (GNUNET_YES == GNUNET_DISK_directory_test (tmp, GNUNET_YES))
- {
- GNUNET_free (execpath);
- return tmp;
- }
- GNUNET_free (tmp);
- tmp = NULL;
- dirname = NULL;
- if (4 == sizeof(void *))
- {
- GNUNET_asprintf (&dirname,
- DIR_SEPARATOR_STR "lib32" DIR_SEPARATOR_STR
- "%s" DIR_SEPARATOR_STR
- "libexec" DIR_SEPARATOR_STR,
- current_pd->project_dirname);
- GNUNET_asprintf (&tmp, "%s%s", execpath, dirname);
- }
- if (8 == sizeof(void *))
- {
- GNUNET_asprintf (&dirname,
- DIR_SEPARATOR_STR "lib64" DIR_SEPARATOR_STR
- "%s" DIR_SEPARATOR_STR
- "libexec" DIR_SEPARATOR_STR,
- current_pd->project_dirname);
- GNUNET_asprintf (&tmp, "%s%s", execpath, dirname);
- }
- if ((NULL != tmp) &&
- (GNUNET_YES == GNUNET_DISK_directory_test (tmp, GNUNET_YES)))
- {
- GNUNET_free (execpath);
- GNUNET_free (dirname);
- return tmp;
- }
- GNUNET_free (tmp);
- GNUNET_free (dirname);
- }
- GNUNET_asprintf (&dirname,
- DIR_SEPARATOR_STR "%s" DIR_SEPARATOR_STR
- "libexec" DIR_SEPARATOR_STR,
- current_pd->project_dirname);
- break;
- default:
- GNUNET_free (execpath);
- return NULL;
- }
- GNUNET_asprintf (&tmp, "%s%s", execpath, dirname);
- GNUNET_free (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;
- }
- /**
- * Given the name of a helper, service or daemon binary construct the full
- * path to the binary using the SUID_BINARY_PATH in the PATHS section of the
- * configuration. If that option is not present, fall back to
- * GNUNET_OS_get_libexec_binary_path. If @a progname is an absolute path, a
- * copy of this path is returned.
- *
- * @param cfg configuration to inspect
- * @param progname name of the binary
- * @return full path to the binary, if possible, a copy of @a progname
- * otherwise
- */
- char *
- GNUNET_OS_get_suid_binary_path (const struct GNUNET_CONFIGURATION_Handle *cfg,
- const char *progname)
- {
- static char *cache;
- char *binary = NULL;
- char *path = NULL;
- size_t path_len;
- if (GNUNET_YES ==
- GNUNET_STRINGS_path_is_absolute (progname, GNUNET_NO, NULL, NULL))
- {
- return GNUNET_strdup (progname);
- }
- if (NULL != cache)
- path = cache;
- else
- GNUNET_CONFIGURATION_get_value_string (cfg,
- "PATHS",
- "SUID_BINARY_PATH",
- &path);
- if ((NULL == path) || (0 == strlen (path)))
- return GNUNET_OS_get_libexec_binary_path (progname);
- path_len = strlen (path);
- GNUNET_asprintf (&binary,
- "%s%s%s",
- path,
- (path[path_len - 1] == DIR_SEPARATOR) ? ""
- : DIR_SEPARATOR_STR,
- progname);
- cache = path;
- 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.
- * W32: must not have an .exe suffix.
- * @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,
- int check_suid,
- const char *params)
- {
- struct stat statbuf;
- char *p;
- char *pf;
- 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;
- }
- }
- 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;
- }
- if (0 == getuid ())
- {
- /* as we run as root, we don't insist on SUID */
- GNUNET_free (p);
- return GNUNET_YES;
- }
- if (0 != stat (p, &statbuf))
- {
- LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_WARNING, "stat", p);
- GNUNET_free (p);
- return GNUNET_SYSERR;
- }
- if (check_suid)
- {
- (void) params;
- if ((0 != (statbuf.st_mode & S_ISUID)) && (0 == statbuf.st_uid))
- {
- GNUNET_free (p);
- return GNUNET_YES;
- }
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- _ ("Binary `%s' exists, but is not SUID\n"),
- p);
- /* binary exists, but not SUID */
- }
- GNUNET_free (p);
- return GNUNET_NO;
- }
- /* end of os_installation.c */
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