commit a72cc6be31afa97532ea4339ee6e5f3ea20fac68
from: Omar Polo <op@omarpolo.com>
date: Thu Feb 11 09:13:58 2021 UTC

improve compat/getprogname on GNU libc

but why'd they called it program_invocation_short_name?  They couldn't
find a longer name?

commit - 4d7043e33c8d90402797c71ff96747897d053515
commit + a72cc6be31afa97532ea4339ee6e5f3ea20fac68
blob - ee178b750ad97e0ed4ef9418d57e61f0004f5147
blob + a243233e862d7543bb608489a36fdfd7c13be822
--- compat/getprogname.c
+++ compat/getprogname.c
@@ -16,8 +16,24 @@
 
 #include "../config.h"
 
+#ifdef HAVE_PROGRAM_INVOCATION_SHORT_NAME
+
+#include <errno.h>
+
+extern char *program_invocation_short_name;
+
 const char *
 getprogname(void)
 {
+	return program_invocation_short_name;
+}
+
+#else
+
+const char *
+getprogname(void)
+{
 	return "gmid";
 }
+
+#endif
blob - 2943ac500abb10cc360f3757fea51b90b04b7b43
blob + ff215093e67bcf907bf3b4c78c9abb336a1d726d
--- configure
+++ configure
@@ -49,6 +49,7 @@ HAVE_GETPROGNAME=
 HAVE_LIBEVENT=
 HAVE_LIBTLS=
 HAVE_OPENSSL=
+HAVE_PROGRAM_INVOCATION_SHORT_NAME=
 HAVE_PR_SET_NAME=
 HAVE_RECALLOCARRAY=
 HAVE_SETPROCTITLE=
@@ -233,6 +234,7 @@ runtest getprogname	GETPROGNAME	|| true
 runtest libevent	LIBEVENT	|| true
 runtest libtls		LIBTLS		|| true
 runtest openssl		OPENSSL		|| true
+runtest program_invocation_short_name PROGRAM_INVOCATION_SHORT_NAME "" -D_GNU_SOURCE || true
 runtest pr_set_name	PR_SET_NAME	|| true
 runtest recallocarray	RECALLOCARRAY	|| true
 runtest setproctitle	SETPROCTITLE	|| true
@@ -283,6 +285,7 @@ cat <<__HEREDOC__
 #define HAVE_EXPLICIT_BZERO	${HAVE_EXPLICIT_BZERO}
 #define HAVE_GETPROGNAME	${HAVE_GETPROGNAME}
 #define HAVE_LIBEVENT		${HAVE_LIBEVENT}
+#define HAVE_PROGRAM_INVOCATION_SHORT_NAME ${HAVE_PROGRAM_INVOCATION_SHORT_NAME}
 #define HAVE_PR_SET_NAME	${HAVE_PR_SET_NAME}
 #define HAVE_RECALLOCARRAY	${HAVE_RECALLOCARRAY}
 #define HAVE_SETPROCTITLE	${SETPROCTITLE}