pledge(2) all programs

All programs except mshow have a very tight set of promises. mshow
has a broad set of promises and might be a good future candidate
to further restrict using unveil(2).

This patch is based on commit 0300a112 by Alex Holst (dated
2017-12-07), which was proposed in GH PR #79.

* pledged mpick, mflow and mdate so that now all programs are pledged
* removed some unneeded promises and added some missing promises
* move err.h include and OpenBSD ifdef into a new xpledge.h
* cleaned up code aligning and whitespace

Closes: #179 [via git-merge-pr]

1 files changed, 3 insertions, 0 deletions

diff --git a/mlist.c b/mlist.c
index 3cb082f..5debf99 100644
--- a/mlist.c
+++ b/mlist.c
@@ -13,6 +13,7 @@
 
 #include "blaze822.h"
 #include "blaze822_priv.h"
+#include "xpledge.h"
 
 /*
 
@@ -272,6 +273,8 @@ usage:
 
 	int i;
 
+	xpledge("stdio rpath", "");
+
 	for (i = 0, flagsum = 0, flagset = 0; (size_t)i < sizeof flags; i++) {
 		if (flags[i] != 0)
 			flagset++;