Imported Upstream version 93u+upstream

1 files changed, 75 insertions, 0 deletions

diff --git a/src/lib/libast/preroot/setpreroot.c b/src/lib/libast/preroot/setpreroot.c
new file mode 100644
index 0000000..1e8b6c1
--- /dev/null
+++ b/src/lib/libast/preroot/setpreroot.c
@@ -0,0 +1,75 @@
+/***********************************************************************
+*                                                                      *
+*               This software is part of the ast package               *
+*          Copyright (c) 1985-2011 AT&T Intellectual Property          *
+*                      and is licensed under the                       *
+*                 Eclipse Public License, Version 1.0                  *
+*                    by AT&T Intellectual Property                     *
+*                                                                      *
+*                A copy of the License is available at                 *
+*          http://www.eclipse.org/org/documents/epl-v10.html           *
+*         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
+*                                                                      *
+*              Information and Software Systems Research               *
+*                            AT&T Research                             *
+*                           Florham Park NJ                            *
+*                                                                      *
+*                 Glenn Fowler <gsf@research.att.com>                  *
+*                  David Korn <dgk@research.att.com>                   *
+*                   Phong Vo <kpv@research.att.com>                    *
+*                                                                      *
+***********************************************************************/
+#pragma prototyped
+/*
+ * AT&T Bell Laboratories
+ * force current command to run under dir preroot
+ */
+
+#include <ast.h>
+#include <preroot.h>
+
+#if FS_PREROOT
+
+#include <option.h>
+
+void
+setpreroot(register char** argv, const char* dir)
+{
+	register char*	s;
+	register char**	ap;
+	int		argc;
+	char*		cmd;
+	char**		av;
+	char		buf[PATH_MAX];
+
+	if ((argv || (argv = opt_info.argv)) && (dir || (dir = getenv(PR_BASE)) && *dir) && !ispreroot(dir) && (*(cmd = *argv++) == '/' || (cmd = pathpath(cmd, NiL, PATH_ABSOLUTE|PATH_REGULAR|PATH_EXECUTE, buf, sizeof(buf)))))
+	{
+		argc = 3;
+		for (ap = argv; *ap++; argc++);
+		if (av = newof(0, char*, argc, 0))
+		{
+			ap = av;
+			*ap++ = PR_COMMAND;
+			*ap++ = (char*)dir;
+			*ap++ = cmd;
+			while (*ap++ = *argv++);
+			if (!(s = getenv(PR_SILENT)) || !*s)
+			{
+				sfprintf(sfstderr, "+");
+				ap = av;
+				while (s = *ap++)
+					sfprintf(sfstderr, " %s", s);
+				sfprintf(sfstderr, "\n");
+				sfsync(sfstderr);
+			}
+			execv(*av, av);
+			free(av);
+		}
+	}
+}
+
+#else
+
+NoN(setpreroot)
+
+#endif