From: Jan Kratochvil <jan.kratochvil@redhat.com>
Date: Mon, 13 May 2013 17:33:52 +0000 (+0200)
Subject: +Nejsou prava na port - musis byt root
X-Git-Url: https://git.jankratochvil.net/?p=lptgpib.git;a=commitdiff_plain;h=28b5992e03b617805d2d24d14b4f7844b52d268f

+Nejsou prava na port - musis byt root
---

diff --git a/lptgpib.c b/lptgpib.c
index 2a9f244..c5bbd62 100644
--- a/lptgpib.c
+++ b/lptgpib.c
@@ -84,7 +84,10 @@ void sig_handler(int sig){
 
 void lptgpib_init(int base){
         lpt_base = base;
-        ioperm(lpt_base, 4, 1);
+        if (ioperm(lpt_base, 4, 1) != 0) {
+	  fprintf(stderr,"Nejsou prava na port - musis byt root: %m\n");
+	  exit(1);
+	}
         
 	/* set realtime priority and lock us in memory */
 	struct sched_param scp;