X-Git-Url: https://diplodocus.org/git/nmh/blobdiff_plain/5dd6771b28c257af405d7248639ed0e3bcdce38b..11e2fb2dbbc074cce78d62fdf425e6bbf1918949:/sbr/getans.c?ds=inline

diff --git a/sbr/getans.c b/sbr/getans.c
index 3229eb57..0800a3c0 100644
--- a/sbr/getans.c
+++ b/sbr/getans.c
@@ -10,15 +10,14 @@
 #include <h/mh.h>
 #include <h/signals.h>
 #include <setjmp.h>
-#include <signal.h>
 
 static char ansbuf[BUFSIZ];
-static jmp_buf sigenv;
+static sigjmp_buf sigenv;
 
 /*
  * static prototypes
  */
-static RETSIGTYPE intrser (int);
+static void intrser (int);
 
 
 char **
@@ -28,7 +27,7 @@ getans (char *prompt, struct swit *ansp)
     SIGNAL_HANDLER istat = NULL;
     char *cp, **cpp;
 
-    if (!(setjmp (sigenv))) {
+    if (!(sigsetjmp(sigenv, 1))) {
 	istat = SIGNAL (SIGINT, intrser);
     } else {
 	SIGNAL (SIGINT, istat);
@@ -40,8 +39,36 @@ getans (char *prompt, struct swit *ansp)
 	fflush (stdout);
 	cp = ansbuf;
 	while ((i = getchar ()) != '\n') {
-	    if (i == EOF)
-		longjmp (sigenv, 1);
+	    if (i == EOF) {
+	    	/*
+		 * If we get an EOF, return
+		 */
+		if (feof(stdin))
+		    siglongjmp (sigenv, 1);
+
+		/*
+		 * For errors, if we get an EINTR that means that we got
+		 * a signal and we should retry.  If we get another error,
+		 * then just return.
+		 */
+
+		else if (ferror(stdin)) {
+		    if (errno == EINTR) {
+		    	clearerr(stdin);
+			continue;
+		    }
+		    fprintf(stderr, "\nError %s during read\n",
+		    	    strerror(errno));
+		    siglongjmp (sigenv, 1);
+		} else {
+		    /*
+		     * Just for completeness's sake ...
+		     */
+
+		    fprintf(stderr, "\nUnknown problem in getchar()\n");
+		    siglongjmp (sigenv, 1);
+		}
+	    }
 	    if (cp < &ansbuf[sizeof ansbuf - 1])
 		*cp++ = i;
 	}
@@ -67,11 +94,13 @@ getans (char *prompt, struct swit *ansp)
 }
 
 
-static RETSIGTYPE
+static void
 intrser (int i)
 {
+    NMH_UNUSED (i);
+
     /*
      * should this be siglongjmp?
      */
-    longjmp (sigenv, 1);
+    siglongjmp (sigenv, 1);
 }