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diff -urP ../bash-5.0.orig/config.h.in config.h.in
--- ../bash-5.0.orig/config.h.in 2018-12-04 09:54:17.000000000 -0700
+++ config.h.in 2019-12-10 11:34:42.157926317 -0700
@@ -1,6 +1,6 @@
/* config.h -- Configuration file for bash. */
-/* Copyright (C) 1987-2009,2011-2012 Free Software Foundation, Inc.
+/* Copyright (C) 1987-2009,2011-2012,2013-2019 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
@@ -807,6 +807,14 @@
#undef HAVE_SETREGID
#undef HAVE_DECL_SETREGID
+/* Define if you have the setregid function. */
+#undef HAVE_SETRESGID
+#undef HAVE_DECL_SETRESGID
+
+/* Define if you have the setresuid function. */
+#undef HAVE_SETRESUID
+#undef HAVE_DECL_SETRESUID
+
/* Define if you have the setvbuf function. */
#undef HAVE_SETVBUF
diff -urP ../bash-5.0.orig/configure configure
--- ../bash-5.0.orig/configure 2019-01-02 07:43:31.000000000 -0700
+++ configure 2019-12-10 11:34:42.166926317 -0700
@@ -10281,6 +10281,17 @@
#define HAVE_DECL_SETREGID $ac_have_decl
_ACEOF
+ac_fn_c_check_decl "$LINENO" "" "ac_cv_have_decl_" "$ac_includes_default"
+if test "x$ac_cv_have_decl_" = xyes; then :
+ ac_have_decl=1
+else
+ ac_have_decl=0
+fi
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DECL_ $ac_have_decl
+_ACEOF
+(setresuid, setresgid)
ac_fn_c_check_decl "$LINENO" "strcpy" "ac_cv_have_decl_strcpy" "$ac_includes_default"
if test "x$ac_cv_have_decl_strcpy" = xyes; then :
ac_have_decl=1
diff -urP ../bash-5.0.orig/configure.ac configure.ac
--- ../bash-5.0.orig/configure.ac 2019-01-02 07:39:11.000000000 -0700
+++ configure.ac 2019-12-10 11:34:42.168926317 -0700
@@ -810,6 +810,7 @@
AC_CHECK_DECLS([printf])
AC_CHECK_DECLS([sbrk])
AC_CHECK_DECLS([setregid])
+AC_CHECK_DECLS[(setresuid, setresgid])
AC_CHECK_DECLS([strcpy])
AC_CHECK_DECLS([strsignal])
diff -urP ../bash-5.0.orig/shell.c shell.c
--- ../bash-5.0.orig/shell.c 2018-12-06 09:28:21.000000000 -0700
+++ shell.c 2019-12-10 11:34:42.170926317 -0700
@@ -1293,7 +1293,11 @@
{
int e;
+#if HAVE_DECL_SETRESUID
+ if (setresuid (current_user.uid, current_user.uid, current_user.uid) < 0)
+#else
if (setuid (current_user.uid) < 0)
+#endif
{
e = errno;
sys_error (_("cannot set uid to %d: effective uid %d"), current_user.uid, current_user.euid);
@@ -1302,7 +1306,11 @@
exit (e);
#endif
}
+#if HAVE_DECL_SETRESGID
+ if (setresgid (current_user.gid, current_user.gid, current_user.gid) < 0)
+#else
if (setgid (current_user.gid) < 0)
+#endif
sys_error (_("cannot set gid to %d: effective gid %d"), current_user.gid, current_user.egid);
current_user.euid = current_user.uid;
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