- int reallen= readlink(path_control, sa.un.sun_path, maxlen);
- if (reallen<0) {
- if (errno != ENOENT)
- NOCONTROL("readlink control socket symlink path %s", path_control);
- }
- if (reallen >= maxlen) {
- debug("control socket symlink path too long (r=%d)",reallen);
- xunlink(path_control, "old (overlong) control socket symlink");
- reallen= -1;
- }
-
- if (reallen<0) {
- struct stat stab;
- int r= lstat(realsockdir,&stab);
- if (r) {
- if (errno != ENOENT) NOCONTROL("lstat real socket dir %s", realsockdir);
-
- r= mkdir(realsockdir, 0700);
- if (r) NOCONTROL("mkdir real socket dir %s", realsockdir);
-
- } else if (!realsockdir_any_perms) {
- uid_t self= geteuid();
- if (!S_ISDIR(stab.st_mode) ||
- stab.st_uid != self ||
- stab.st_mode & 0007) {
- warn("no control socket, because real socket directory"
- " is somehow wrong (ISDIR=%d, uid=%lu (exp.%lu), mode %lo)",
- !!S_ISDIR(stab.st_mode),
- (unsigned long)stab.st_uid, (unsigned long)self,
- (unsigned long)stab.st_mode & 0777UL);
- goto nocontrol;
- }
- }
-
- real= xasprintf("%s/s%lx.%lx", realsockdir,
- (unsigned long)xtime(), (unsigned long)self_pid);
- int reallen= strlen(real);
-
- if (reallen >= maxlen) {
- warn("no control socket, because tmpnam gave overly-long path"
- " %s", real);
- goto nocontrol;
- }
- r= symlink(real, path_control);
- if (r) NOCONTROL("make control socket path %s a symlink to real"
- " socket path %s", path_control, real);
- memcpy(sa.un.sun_path, real, reallen);
- }