Handle the fact that the GNU Hurd sets the signal sender PID to -1, not either 0 or the signal sender, in the siginfo structure.

configure.ac

@@ -94,7 +94,7 @@ static void receiveUSR2( __attribute__((unused))
 	(void) sigaction(SIGUSR2, &sa, NULL);
 	raise(SIGUSR2);
 #endif
-	return signalSender == 0 ? 1 : 0;
+	return signalSender < 1 ? 1 : 0;
 ]])], [
 AC_MSG_RESULT([yes])
 AC_DEFINE([SIGINFO_PROVIDES_PID], [1], [Signal handlers can determine the sending PID])

docs/NEWS.md

@@ -4,6 +4,7 @@
  * *feature:* new bar formats "**%{bar-plain}**", "**%{bar-block}**", "**%{bar-granular}**", "**%{bar-shaded}**" ([#15](https://codeberg.org/a-j-wood/pv/issues/15))
  * *feature:* allow decimal values such as "1.5G" with "**--size**", "**--rate-limit**", "**--buffer-size**", and "**error-skip-block**" ([#35](https://codeberg.org/a-j-wood/pv/issues/35))
  * *cleanup:* track transfer percentage as a floating point value for better precision (and rounding)
+ * *cleanup:* correct detection of **--remote** usability on GNU Hurd
  * *docs:* simplified the synopsis section of the manual
 
 ### 1.9.15 - 8 December 2024