Blame SOURCES/ltrace-0.7.91-testsuite-system_call_params.patch

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diff -rup a/testsuite/Makefile.am b/testsuite/Makefile.am
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--- a/testsuite/Makefile.am	2012-12-16 20:53:45.000000000 -0500
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+++ b/testsuite/Makefile.am	2019-06-28 16:59:19.935602953 -0400
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@@ -39,6 +39,7 @@ env.exp: Makefile
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 	rm -f env.exp
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 	echo set libelf_LD_LIBRARY_PATH '"$(libelf_LD_LIBRARY_PATH)"' >> $@
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 	echo set libunwind_LD_LIBRARY_PATH '"$(libunwind_LD_LIBRARY_PATH)"' >> $@
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+	echo set PREFIX '"$(prefix)"' >> $@
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 CLEANFILES = *.o *.so *.log *.sum *.ltrace site.bak setval.tmp site.exp env.exp
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diff -rup a/testsuite/Makefile.in b/testsuite/Makefile.in
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--- a/testsuite/Makefile.in	2013-11-04 20:22:47.000000000 -0500
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+++ b/testsuite/Makefile.in	2019-06-28 16:59:12.075602806 -0400
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@@ -648,6 +648,7 @@ env.exp: Makefile
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 	rm -f env.exp
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 	echo set libelf_LD_LIBRARY_PATH '"$(libelf_LD_LIBRARY_PATH)"' >> $@
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 	echo set libunwind_LD_LIBRARY_PATH '"$(libunwind_LD_LIBRARY_PATH)"' >> $@
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+	echo set PREFIX '"$(prefix)"' >> $@
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 # Tell versions [3.59,3.63) of GNU make to not export all variables.
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 # Otherwise a system limit (for SysV at least) may be exceeded.
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diff -rup a/testsuite/ltrace.main/system_call_params.exp b/testsuite/ltrace.main/system_call_params.exp
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--- a/testsuite/ltrace.main/system_call_params.exp	2019-06-28 16:44:07.542584754 -0400
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+++ b/testsuite/ltrace.main/system_call_params.exp	2019-06-28 17:00:35.811604355 -0400
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@@ -1,5 +1,5 @@
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 # This file is part of ltrace.
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-# Copyright (C) 2013, 2014 Petr Machata, Red Hat Inc.
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+# Copyright (C) 2013, 2014, 2015 Petr Machata, Red Hat Inc.
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 #
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 # This program is free software; you can redistribute it and/or
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 # modify it under the terms of the GNU General Public License as
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@@ -60,8 +60,35 @@ set conf [ltraceNamedSource "$dir/syscal
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 # somelib.conf is passed, and syscalls.conf is not available, or
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 # doesn't list readdir, that would be taken from somelib.conf with a
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 # wrong prototype.
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+#
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+# This test relies on the fact that there is no global config file
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+# that would provide legitimate system call prototypes.  But that
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+# doesn't have to be true, maybe ltrace is already installed on the
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+# system with the right prefix.  So first compile a wrapper that we
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+# use to redirect fopen calls.
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+
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+set libfopen_so [ltraceCompile libfopen.so -ldl \
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+		     [ltraceSource c [string map [list "@PREFIX@" "$PREFIX"] {
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+    #define _GNU_SOURCE
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+    #include <dlfcn.h>
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+    #include <stdio.h>
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+    #include <string.h>
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+
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+    FILE *
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+    fopen(const char *path, const char *mode)
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+    {
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+	#define PATH "@PREFIX@/share"
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+	if (strncmp(path, PATH, sizeof(PATH) - 1) == 0)
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+	    path = "/dev/null";
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+	return ((FILE *(*)(const char *, const char *))
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+		dlsym(RTLD_NEXT, "fopen")) (path, mode);
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+    }
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+}]]]
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+ 
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+setenv LD_PRELOAD $libfopen_so
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 ltraceMatch1 [ltraceRun -L -S -F $conf -- $bin] {^open@SYS\("/some/path", 0\)} == 0
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+unsetenv LD_PRELOAD
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 # On the other hand, if -F somedir/ is given, we want to accept
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 # syscalls.conf found there.