X-Git-Url: https://diplodocus.org/git/nmh/blobdiff_plain/6c42153ad9362cc676ea66563bf400d7511b3b68..b19b165203124e56cdcb89539efa6f93ed14f99d:/sbr/context_save.c

diff --git a/sbr/context_save.c b/sbr/context_save.c
index 58d17451..d7d87e45 100644
--- a/sbr/context_save.c
+++ b/sbr/context_save.c
@@ -2,8 +2,6 @@
 /*
  * context_save.c -- write out the updated context file
  *
- * $Id$
- *
  * This code is Copyright (c) 2002, by the authors of nmh.  See the
  * COPYRIGHT file in the root directory of the nmh distribution for
  * complete copyright information.
@@ -25,6 +23,10 @@ context_save (void)
     register struct node *np;
     FILE *out;
     sigset_t set, oset;
+    
+    /* No context in use -- silently ignore any changes! */
+    if (!ctxpath)
+       return;
 
     if (!(ctxflags & CTXMOD))
 	return;
@@ -39,18 +41,20 @@ context_save (void)
     sigaddset (&set, SIGINT);
     sigaddset (&set, SIGQUIT);
     sigaddset (&set, SIGTERM);
-    SIGPROCMASK (SIG_BLOCK, &set, &oset);
+    sigprocmask (SIG_BLOCK, &set, &oset);
 
-    if (!(out = fopen (ctxpath, "w")))
+    if (!(out = lkfopendata (ctxpath, "w")))
 	adios (ctxpath, "unable to write");
     for (np = m_defs; np; np = np->n_next)
 	if (np->n_context)
 	    fprintf (out, "%s: %s\n", np->n_name, np->n_field);
-    fclose (out);
+    lkfclosedata (out, ctxpath);
 
-    SIGPROCMASK (SIG_SETMASK, &oset, &set); /* reset the signal mask */
+    sigprocmask (SIG_SETMASK, &oset, &set); /* reset the signal mask */
 
     if (action == 0)
+	/* This must be _exit(), not exit(), because the child didn't
+	   call unregister_for_removal() in m_chkids(). */
 	_exit (0);		/* we are child, time to die */
 }
 
@@ -81,6 +85,8 @@ m_chkids (void)
 	    break;
 
 	case 0:
+	    /* It's not necessary to call unregister_for_removal(0)
+               because the child calls _exit() in context_save(). */
 	    setgid (getgid ());
 	    setuid (getuid ());
 	    break;