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upstream: produce a useful error message if the user's shell is set 

incorrectly during "match exec" processing. bz#2791 reported by Dario
Bertini; ok dtucker

OpenBSD-Commit-ID: cf9eddd6a6be726cb73bd9c3936f3888cd85c03d
This commit is contained in:
djm@openbsd.org 2019-08-09 05:05:54 +00:00 committed by Damien Miller
parent 8fdbc7247f
commit 9ab5b94747
1 changed files with 6 additions and 1 deletions
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7
readconf.c
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@ -1,4 +1,4 @@
/* $OpenBSD: readconf.c,v 1.307 2019/06/28 13:35:04 deraadt Exp $ */
/* $OpenBSD: readconf.c,v 1.308 2019/08/09 05:05:54 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -486,6 +486,11 @@ execute_in_shell(const char *cmd)
if ((shell = getenv("SHELL")) == NULL)
shell = _PATH_BSHELL;
if (access(shell, X_OK) == -1) {
fatal("Shell \"%s\" is not executable: %s",
shell, strerror(errno));
}
/* Need this to redirect subprocess stdin/out */
if ((devnull = open(_PATH_DEVNULL, O_RDWR)) == -1)
fatal("open(/dev/null): %s", strerror(errno));