diff --git a/src/sysunix.c b/src/sysunix.c
index 4cff17c..74bd1ac 100644
--- a/src/sysunix.c
+++ b/src/sysunix.c
@@ -20,6 +20,7 @@
  */
 #include "editline.h"
 
+/* Prefer termios over the others since it is likely the most portable. */
 #if defined(HAVE_TCGETATTR)
 #include <termios.h>
 
@@ -28,8 +29,9 @@ void rl_ttyset(int Reset)
     static struct termios       old;
     struct termios              new;
 
-    if (Reset == 0) {
-        if (tcgetattr(0, &old) < 0) perror("tcgetattr");
+    if (!Reset) {
+        if (-1 == tcgetattr(0, &old))
+	    perror("Failed tcgetattr");
         rl_erase = old.c_cc[VERASE];
         rl_kill = old.c_cc[VKILL];
         rl_eof = old.c_cc[VEOF];
@@ -44,9 +46,11 @@ void rl_ttyset(int Reset)
         new.c_iflag &= ~(ISTRIP | INPCK);
         new.c_cc[VMIN] = 1;
         new.c_cc[VTIME] = 0;
-        if (tcsetattr(0, TCSADRAIN, &new) < 0) perror("tcsetattr");
+        if (-1 == tcsetattr(0, TCSADRAIN, &new))
+	    perror("Failed tcsetattr");
     } else {
-        (void)tcsetattr(0, TCSADRAIN, &old);
+        if (-1 == tcsetattr(0, TCSADRAIN, &old))
+	    perror("Failed tcsetattr");
     }
 }
 
@@ -58,8 +62,9 @@ void rl_ttyset(int Reset)
     static struct termio        old;
     struct termio               new;
 
-    if (Reset == 0) {
-        (void)ioctl(0, TCGETA, &old);
+    if (!Reset) {
+	if (-1 == ioctl(0, TCGETA, &old))
+	    perror("Failed ioctl(TCGETA)");
         rl_erase = old.c_cc[VERASE];
         rl_kill = old.c_cc[VKILL];
         rl_eof = old.c_cc[VEOF];
@@ -74,13 +79,15 @@ void rl_ttyset(int Reset)
         new.c_iflag &= ~(ISTRIP | INPCK);
         new.c_cc[VMIN] = 1;
         new.c_cc[VTIME] = 0;
-        (void)ioctl(0, TCSETAW, &new);
+        if (-1 == ioctl(0, TCSETAW, &new))
+	    perror("Failed ioctl(TCSETAW)");
     } else {
-        (void)ioctl(0, TCSETAW, &old);
+	if (-1 == ioctl(0, TCSETAW, &old))
+	    perror("Failed ioctl(TCSETAW)");
     }
 }
 
-#else /* Neither HAVE_TERMIO_H or HAVE_TCGETATTR */
+#elif defined(HAVE_SGTTY_H)
 #include <sgtty.h>
 
 void rl_ttyset(int Reset)
@@ -93,18 +100,21 @@ void rl_ttyset(int Reset)
     struct ltchars              old_ltchars;
 #endif
 
-    if (Reset == 0) {
-        (void)ioctl(0, TIOCGETP, &old_sgttyb);
+    if (!Reset) {
+        if (-1 == ioctl(0, TIOCGETP, &old_sgttyb))
+	    perror("Failed TIOCGETP");
         rl_erase = old_sgttyb.sg_erase;
         rl_kill = old_sgttyb.sg_kill;
 
-        (void)ioctl(0, TIOCGETC, &old_tchars);
+        if (-1 == ioctl(0, TIOCGETC, &old_tchars))
+	    perror("Failed TIOCGETC");
         rl_eof = old_tchars.t_eofc;
         rl_intr = old_tchars.t_intrc;
         rl_quit = old_tchars.t_quitc;
 
 #ifdef CONFIG_SIGSTOP
-        (void)ioctl(0, TIOCGLTC, &old_ltchars);
+        if (-1 == ioctl(0, TIOCGLTC, &old_ltchars))
+	    perror("Failed TIOCGLTC");
         rl_susp = old_ltchars.t_suspc;
 #endif
 
@@ -114,24 +124,37 @@ void rl_ttyset(int Reset)
 #ifdef PASS8
         new_sgttyb.sg_flags |= PASS8;
 #endif
-        (void)ioctl(0, TIOCSETP, &new_sgttyb);
-
+        if (-1 == ioctl(0, TIOCSETP, &new_sgttyb))
+	    perror("Failed TIOCSETP");
         new_tchars = old_tchars;
         new_tchars.t_intrc = -1;
         new_tchars.t_quitc = -1;
-        (void)ioctl(0, TIOCSETC, &new_tchars);
+        if (-1 == ioctl(0, TIOCSETC, &new_tchars))
+	    perror("Failed TIOCSETC");
     } else {
-        (void)ioctl(0, TIOCSETP, &old_sgttyb);
-        (void)ioctl(0, TIOCSETC, &old_tchars);
+        if (-1 == ioctl(0, TIOCSETP, &old_sgttyb))
+	    perror("Failed TIOCSETP");
+        if (-1 == ioctl(0, TIOCSETC, &old_tchars))
+	    perror("Failed TIOCSETC");
     }
 }
-#endif /* Neither HAVE_TERMIO_H or HAVE_TCGETATTR */
+#else /* Neither HAVE_SGTTY_H, HAVE_TERMIO_H or HAVE_TCGETATTR */
+#error Unsupported platform, missing tcgetattr(), termio.h and sgtty.h
+#endif /* Neither HAVE_SGTTY_H, HAVE_TERMIO_H or HAVE_TCGETATTR */
 
 void rl_add_slash(char *path, char *p)
 {
     struct stat Sb;
 
     if (stat(path, &Sb) >= 0)
-        (void)strcat(p, S_ISDIR(Sb.st_mode) ? "/" : " ");
+        strcat(p, S_ISDIR(Sb.st_mode) ? "/" : " ");
 }
 
+/**
+ * Local Variables:
+ *  version-control: t
+ *  indent-tabs-mode: t
+ *  c-file-style: "ellemtel"
+ *  c-basic-offset: 4
+ * End:
+ */