handle empty strings returned by fgets

use strcspn to properly overwrite '\n' in fgets returned buffer

ok ray@

1 files changed, 5 insertions, 6 deletions

diff --git a/usr.bin/tn3270/tools/mkhits/dohits.c b/usr.bin/tn3270/tools/mkhits/dohits.c
index 5e6ba71805e..11059beabbf 100644
--- a/usr.bin/tn3270/tools/mkhits/dohits.c
+++ b/usr.bin/tn3270/tools/mkhits/dohits.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: dohits.c,v 1.8 2003/06/03 02:56:20 millert Exp $	*/
+/*	$OpenBSD: dohits.c,v 1.9 2007/09/25 11:35:00 chl Exp $	*/
 
 /*-
  * Copyright (c) 1988 The Regents of the University of California.
@@ -31,7 +31,7 @@
 
 #ifndef lint
 /*static char sccsid[] = "from: @(#)dohits.c	4.2 (Berkeley) 4/26/91";*/
-static char rcsid[] = "$OpenBSD: dohits.c,v 1.8 2003/06/03 02:56:20 millert Exp $";
+static char rcsid[] = "$OpenBSD: dohits.c,v 1.9 2007/09/25 11:35:00 chl Exp $";
 #endif /* not lint */
 
 /*
@@ -133,7 +133,7 @@ char *file,		/* Name of file to scan for whitespace prefix */
 		}
 		break;
 	    }
-	} while (line[strlen(line)-1] != '\n');
+	} while (strchr(line, '\n') == NULL);
     }
 }
 
@@ -173,7 +173,7 @@ char *file,		/* Name of file to scan for #define prefix */
 		}
 		break;
 	    }
-	} while (line[strlen(line)-1] != '\n');
+	} while (strchr(line, '\n') == NULL);
     }
 }
 
@@ -257,8 +257,7 @@ char	*aidfile, *fcnfile;
     scanwhite(fcnfile, "FCN_");
 
     while (fgets(line, sizeof(line), stdin) != NULL) {
-	if (line[strlen(line)-1] == '\n')
-		line[strlen(line)-1] = '\0';
+	line[strcspn(line, "\n")] = '\0';
 	if (!isdigit(line[0])) {
 	    continue;
 	}