+ negative = *status == '-';
+ status += negative || *status == '+';
+
+ for (;;)
+ {
+ int digit = *status++ - '0';
+ if (9 < (unsigned) digit)
+ break;
+ else
+ {
+ off_t c10 = 10 * count;
+ off_t nc = negative ? c10 - digit : c10 + digit;
+ if (c10 / 10 != count || (negative ? c10 < nc : nc < c10))
+ return -1;
+ count = nc;
+ }
+ }
+
+ return count;
+ }
+}
+
+#if WITH_REXEC
+
+/* Execute /etc/rmt as user USER on remote system HOST using rexec.
+ Return a file descriptor of a bidirectional socket for stdin and
+ stdout. If USER is zero, use the current username.
+
+ By default, this code is not used, since it requires that the user
+ have a .netrc file in his/her home directory, or that the
+ application designer be willing to have rexec prompt for login and
+ password info. This may be unacceptable, and .rhosts files for use
+ with rsh are much more common on BSD systems. */