+
+bool ReadAll(int sd, void * dest, size_t size)
+{
+size_t done = 0;
+char * ptr = static_cast<char *>(dest);
+while (done < size)
+ {
+ if (!WaitPackets(sd))
+ return false;
+ ssize_t res = read(sd, ptr + done, size - done);
+ if (res < 0)
+ return false;
+ if (res == 0)
+ return true;
+ done += res;
+ }
+return true;
+}
+
+bool WriteAll(int sd, const void * source, size_t size)
+{
+size_t done = 0;
+const char * ptr = static_cast<const char *>(source);
+while (done < size)
+ {
+ ssize_t res = write(sd, ptr + done, size - done);
+ if (res <= 0)
+ return false;
+ done += res;
+ }
+return true;
+}
+
+std::string ToPrintable(const std::string & src)
+{
+ std::string dest;
+
+ for (size_t i = 0; i < src.size(); ++i)
+ if (std::isprint(src[i]))
+ dest += src[i];
+ else
+ dest += "\\" + x2str(src[i]);
+
+ return dest;
+}
+
+uid_t str2uid(const std::string& name)
+{
+ const passwd* res = getpwnam(name.c_str());
+ if (res == NULL)
+ return -1;
+ return res->pw_uid;
+}
+
+gid_t str2gid(const std::string& name)
+{
+ const group* res = getgrnam(name.c_str());
+ if (res == NULL)
+ return -1;
+ return res->gr_gid;
+}
+
+mode_t str2mode(const std::string& name)
+{
+ if (name.length() < 3 || name.length() > 4)
+ return -1;
+
+ if (name.length() == 4 && name[0] != '0')
+ return -1;
+
+ mode_t res = 0;
+ for (size_t i = 0; i < name.length(); ++i)
+ {
+ if (name[i] > '7' || name[i] < '0')
+ return -1;
+ res = (res << 3) + (name[i] - '0');
+ }
+ return res;
+}