sim: start unifying portability shims

There are some functions that gnulib does not yet provide fallbacks
for, so start a common file of our own for holding existing stubs.

5 files changed, 122 insertions, 0 deletions

diff --git a/sim/common/ChangeLog b/sim/common/ChangeLog
index 5d713c6..8f44658 100644
--- a/sim/common/ChangeLog
+++ b/sim/common/ChangeLog
@@ -1,5 +1,11 @@
 2021-06-12  Mike Frysinger  <vapier@gentoo.org>
 
+	* Make-common.in (COMMON_OBJS_NAMES): Add portability.o.
+	* local.mk (%C%_libcommon_a_SOURCES): Add %D%/portability.c.
+	* portability.c, portability.h: New files.
+
+2021-06-12  Mike Frysinger  <vapier@gentoo.org>
+
 	* Make-common.in (SIM_NEW_COMMON_OBJS): Move sim-load.o to ...
 	(COMMON_OBJS_NAMES): ... here.  Rename var from COMMON_OBJS.
 	(COMMON_OBJS): Redefine.
diff --git a/sim/common/Make-common.in b/sim/common/Make-common.in
index 8454d16..7a5bbc1 100644
--- a/sim/common/Make-common.in
+++ b/sim/common/Make-common.in
@@ -254,6 +254,7 @@ EXTRA_LIBS = $(BFD_LIB) $(OPCODES_LIB) $(LIBINTL) $(LIBIBERTY_LIB) \
 	$(CONFIG_LIBS) $(SIM_EXTRA_LIBS) $(LIBDL) $(LIBGNU) $(LIBGNU_EXTRA_LIBS)
 
 COMMON_OBJS_NAMES = \
+	portability.o \
 	sim-load.o \
 	version.o
 COMMON_OBJS = $(COMMON_OBJS_NAMES:%=../common/common_libcommon_a-%)
diff --git a/sim/common/local.mk b/sim/common/local.mk
index a340feb..076335d 100644
--- a/sim/common/local.mk
+++ b/sim/common/local.mk
@@ -34,6 +34,7 @@ noinst_LIBRARIES += %D%/libcommon.a
 	-I../bfd \
 	-I..
 %C%_libcommon_a_SOURCES = \
+	%D%/portability.c \
 	%D%/sim-load.c \
 	%D%/version.c
 
diff --git a/sim/common/portability.c b/sim/common/portability.c
new file mode 100644
index 0000000..f0ccc46
--- /dev/null
+++ b/sim/common/portability.c
@@ -0,0 +1,67 @@
+/* Portability shims for missing OS support.
+   Copyright (C) 2021 Free Software Foundation, Inc.
+   Contributed by Mike Frysinger.
+
+This file is part of the GNU Simulators.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+/* This must come before any other includes.  */
+#include "defs.h"
+
+#include <unistd.h>
+
+#include "portability.h"
+
+#ifndef HAVE_GETEGID
+int getegid(void)
+{
+  return 0;
+}
+#endif
+
+#ifndef HAVE_GETEUID
+int geteuid(void)
+{
+  return 0;
+}
+#endif
+
+#ifndef HAVE_GETGID
+int getgid(void)
+{
+  return 0;
+}
+#endif
+
+#ifndef HAVE_GETUID
+int getuid(void)
+{
+  return 0;
+}
+#endif
+
+#ifndef HAVE_SETGID
+int setgid(int gid)
+{
+  return -1;
+}
+#endif
+
+#ifndef HAVE_SETUID
+int setuid(int uid)
+{
+  return -1;
+}
+#endif
diff --git a/sim/common/portability.h b/sim/common/portability.h
new file mode 100644
index 0000000..12971f6
--- /dev/null
+++ b/sim/common/portability.h
@@ -0,0 +1,47 @@
+/* Portability shims for missing OS support.
+   Copyright (C) 2021 Free Software Foundation, Inc.
+   Contributed by Mike Frysinger.
+
+This file is part of the GNU Simulators.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#ifndef PORTABILITY_H
+#define PORTABILITY_H
+
+#ifndef HAVE_GETEGID
+int getegid(void);
+#endif
+
+#ifndef HAVE_GETEUID
+int geteuid(void);
+#endif
+
+#ifndef HAVE_GETGID
+int getgid(void);
+#endif
+
+#ifndef HAVE_GETUID
+int getuid(void);
+#endif
+
+#ifndef HAVE_SETGID
+int setgid(int gid);
+#endif
+
+#ifndef HAVE_SETUID
+int setuid(int uid);
+#endif
+
+#endif