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@@ -1678,15 +1678,20 @@ file_status(const char *fname)
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* is group-readable, but in all cases we create the directory mode 0700.
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* If CPD_CHECK_MODE_ONLY is set, then we don't alter the directory permissions
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* if they are too permissive: we just return -1.
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+ * When effective_user is not NULL, check permissions against the given user and
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+ * its primary group.
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*/
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int
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-check_private_dir(const char *dirname, cpd_check_t check)
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+check_private_dir(const char *dirname, cpd_check_t check, const char *effective_user)
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{
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int r;
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struct stat st;
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char *f;
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#ifndef MS_WINDOWS
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int mask;
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+ struct passwd *pw = NULL;
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+ uid_t running_uid;
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+ gid_t running_gid;
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#endif
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tor_assert(dirname);
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@@ -1725,33 +1730,47 @@ check_private_dir(const char *dirname, cpd_check_t check)
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return -1;
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}
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#ifndef MS_WINDOWS
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- if (st.st_uid != getuid()) {
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+ if (effective_user) {
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+ /* Lookup the user and group information, if we have a problem, bail out. */
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+ pw = getpwnam(effective_user);
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+ if (pw == NULL) {
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+ log_warn(LD_CONFIG, "Error setting configured user: %s not found", effective_user);
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+ return -1;
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+ }
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+ running_uid = pw->pw_uid;
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+ running_gid = pw->pw_gid;
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+ } else {
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+ running_uid = getuid();
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+ running_gid = getgid();
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+ }
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+
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+ if (st.st_uid != running_uid) {
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struct passwd *pw = NULL;
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char *process_ownername = NULL;
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- pw = getpwuid(getuid());
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+ pw = getpwuid(running_uid);
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process_ownername = pw ? tor_strdup(pw->pw_name) : tor_strdup("<unknown>");
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pw = getpwuid(st.st_uid);
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log_warn(LD_FS, "%s is not owned by this user (%s, %d) but by "
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"%s (%d). Perhaps you are running Tor as the wrong user?",
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- dirname, process_ownername, (int)getuid(),
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+ dirname, process_ownername, (int)running_uid,
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pw ? pw->pw_name : "<unknown>", (int)st.st_uid);
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tor_free(process_ownername);
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return -1;
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}
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- if ((check & CPD_GROUP_OK) && st.st_gid != getgid()) {
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+ if ((check & CPD_GROUP_OK) && st.st_gid != running_gid) {
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struct group *gr;
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char *process_groupname = NULL;
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- gr = getgrgid(getgid());
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+ gr = getgrgid(running_gid);
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process_groupname = gr ? tor_strdup(gr->gr_name) : tor_strdup("<unknown>");
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gr = getgrgid(st.st_gid);
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log_warn(LD_FS, "%s is not owned by this group (%s, %d) but by group "
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"%s (%d). Are you running Tor as the wrong user?",
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- dirname, process_groupname, (int)getgid(),
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+ dirname, process_groupname, (int)running_gid,
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gr ? gr->gr_name : "<unknown>", (int)st.st_gid);
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tor_free(process_groupname);
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