From: Roger Shimizu <rogershimizu@gmail.com>
Date: Thu, 17 Dec 2015 00:59:39 +0900
Subject: avoid a few gcc warnings

Signed-off-by: Roger Shimizu <rogershimizu@gmail.com>
---
 adjtimex.c | 19 +++++++++----------
 1 file changed, 9 insertions(+), 10 deletions(-)

diff --git a/adjtimex.c b/adjtimex.c
index 4ea0bb0..028cd74 100644
--- a/adjtimex.c
+++ b/adjtimex.c
@@ -176,7 +176,6 @@ struct option longopt[]=
 
 static void usage(void);
 static inline void outb (short port, char val);
-static inline void outb (short port, char val);
 static inline unsigned char inb (short port);
 static void cmos_init (void);
 static void cmos_init_directisa (void);
@@ -543,22 +542,20 @@ outb (short port, char val)
   __asm__ volatile ("out%B0 %0,%1"::"a" (val), "d" (port));
 
 #else
-  lseek (port_fd, port, 0);
-  write (port_fd, &val, 1);
+  if (lseek (port_fd, port, 0) == port && write (port_fd, &val, 1));
 #endif
 }
 
 static inline unsigned char
 inb (short port)
 {
-  unsigned char ret;
+  unsigned char ret = 0;
 
 #ifdef USE_INLINE_ASM_IO
   __asm__ volatile ("in%B0 %1,%0":"=a" (ret):"d" (port));
 
 #else
-  lseek (port_fd, port, 0);
-  read (port_fd, &ret, 1);
+  if (lseek (port_fd, port, 0) == port && read (port_fd, &ret, 1));
 #endif
   return ret;
 }
@@ -1554,7 +1551,7 @@ int valid_system_rate(double ftime_sys, double ftime_ref, double sigma_ref)
 {
   int n;
   int default_answer;
-  int ch;
+  int ch = 0;
   char buf[BUFLEN];
   struct hack *ph;
   struct cmos_adj *pca = get_cmos_adjustment();
@@ -1647,7 +1644,8 @@ ctime(&prev.log));
       printf("  the kernel time variables have not been changed, and\n");
       printf("  the computer has not been suspended? (y/n) [%c] ", 
 	     default_answer);
-      fgets(buf, BUFLEN, stdin);
+      if (fgets(buf, BUFLEN, stdin) != buf)
+        continue;
       ch = buf[0];
       if (ch == '\n') ch = default_answer;
     } while (ch != 'n' && ch != 'y');
@@ -1674,7 +1672,7 @@ static
 int valid_cmos_rate(double ftime_cmos, double ftime_ref, double sigma_ref)
 {
   int default_answer;
-  int ch;
+  int ch = 0;
   char buf[BUFLEN];
 
   default_answer = undisturbed_cmos?'y':'n';
@@ -1685,7 +1683,8 @@ int valid_cmos_rate(double ftime_cmos, double ftime_ref, double sigma_ref)
       printf("  it has not been reset with `/sbin/hwclock',\n");
       printf("  no operating system other than Linux has been running, and\n");
       printf("  ntpd has not been running? (y/n) [%c] ", default_answer);
-      fgets(buf, BUFLEN, stdin);
+      if (fgets(buf, BUFLEN, stdin) != buf)
+        continue;
       ch = buf[0];
       if (ch == '\n') ch = default_answer;
     } while (ch != 'n' && ch != 'y');