From 8adc4a2c5686844f331b0ca8b35bb1b880eb05eb Mon Sep 17 00:00:00 2001
From: tg <tg@mirbsd.org>
Date: Thu, 16 Nov 2006 13:35:07 +0000
Subject: [PATCH] support systems without setresugid

---
 main.c | 12 +++++++++++-
 misc.c | 12 ++++++++++--
 2 files changed, 21 insertions(+), 3 deletions(-)

diff --git a/main.c b/main.c
index d63b80e..ac6d35a 100644
--- a/main.c
+++ b/main.c
@@ -13,10 +13,15 @@
 #include <locale.h>
 #endif
 
-__RCSID("$MirOS: src/bin/mksh/main.c,v 1.61 2006/11/12 14:58:15 tg Exp $");
+__RCSID("$MirOS: src/bin/mksh/main.c,v 1.62 2006/11/16 13:35:07 tg Exp $");
 
 extern char **environ;
 
+#if !HAVE_SETRESUGID
+extern uid_t kshuid;
+extern gid_t kshgid, kshegid;
+#endif
+
 static void reclaim(void);
 static void remove_temps(struct temp *);
 
@@ -220,7 +225,12 @@ main(int argc, char *argv[])
 		setstr(vp, safe_prompt, KSH_RETURN_ERROR);
 
 	/* Set this before parsing arguments */
+#if HAVE_SETRESUGID
 	Flag(FPRIVILEGED) = getuid() != ksheuid || getgid() != getegid();
+#else
+	Flag(FPRIVILEGED) = (kshuid = getuid()) != ksheuid ||
+	    (kshgid = getgid()) != (kshegid = getegid());
+#endif
 
 	/* this to note if monitor is set on command line (see below) */
 	Flag(FMONITOR) = 127;
diff --git a/misc.c b/misc.c
index 8bb4de4..f08b5f4 100644
--- a/misc.c
+++ b/misc.c
@@ -6,7 +6,7 @@
 #include <grp.h>
 #endif
 
-__RCSID("$MirOS: src/bin/mksh/misc.c,v 1.42 2006/11/12 14:58:15 tg Exp $\t"
+__RCSID("$MirOS: src/bin/mksh/misc.c,v 1.43 2006/11/16 13:35:07 tg Exp $\t"
 	MKSH_SH_H_ID);
 
 #undef USE_CHVT
@@ -16,6 +16,11 @@ __RCSID("$MirOS: src/bin/mksh/misc.c,v 1.42 2006/11/12 14:58:15 tg Exp $\t"
 
 unsigned char chtypes[UCHAR_MAX + 1];	/* type bits for unsigned char */
 
+#if !HAVE_SETRESUGID
+uid_t kshuid;
+gid_t kshgid, kshegid;
+#endif
+
 static int do_gmatch(const unsigned char *, const unsigned char *,
     const unsigned char *, const unsigned char *);
 static const unsigned char *cclass(const unsigned char *, int);
@@ -251,7 +256,10 @@ change_flag(enum sh_flag f,
 #endif
 		setresuid(ksheuid, ksheuid, ksheuid);
 #else
-#error setresid/setresgid required at the moment
+		seteuid(ksheuid = kshuid = getuid());
+		setuid(ksheuid);
+		setegid(kshegid = kshgid = getgid());
+		setgid(kshegid);
 #endif
 	} else if (f == FPOSIX && newval) {
 		Flag(FBRACEEXPAND) = 0;