Fix some Coverity Scan errors.

newlib/libc/posix/sleep.c

@@ -7,6 +7,7 @@
 #include <errno.h>
 #include <time.h>
 #include <unistd.h>
+#include <limits.h>
 
 unsigned sleep(unsigned seconds)
 {
@@ -15,7 +16,7 @@ unsigned sleep(unsigned seconds)
     ts.tv_sec = seconds;
     ts.tv_nsec = 0;
     if (!nanosleep(&ts,&ts)) return 0;
-    if (errno == EINTR) return ts.tv_sec;
+    if (errno == EINTR) return ts.tv_sec & UINT_MAX;
     return -1;
 }
 

newlib/libc/posix/usleep.c

@@ -15,7 +15,6 @@ int usleep(useconds_t useconds)
     ts.tv_sec = (long int)useconds / 1000000;
     ts.tv_nsec = ((long int)useconds % 1000000) * 1000;
     if (!nanosleep(&ts,&ts)) return 0;
-    if (errno == EINTR) return ts.tv_sec;
     return -1;
 }
 

newlib/libc/stdio/swscanf.c

@@ -427,6 +427,8 @@ swscanf (const wchar_t *__restrict str, const wchar_t *__restrict fmt, ...)
   f._read = __seofread;
   f._ub._base = NULL;
   f._lb._base = NULL;
+  f._flags2 = 0;
+  f._ur = 0;
   f._file = -1;  /* No file. */
   va_start (ap, fmt);
   ret = __ssvfwscanf_r (_REENT, &f, fmt, ap);

newlib/libc/stdio/vswscanf.c

@@ -53,6 +53,8 @@ _vswscanf_r (struct _reent *ptr, const wchar_t *str, const wchar_t *fmt,
   f._read = __seofread;
   f._ub._base = NULL;
   f._lb._base = NULL;
+  f._flags2 = 0;
+  f._ur = 0;
   f._file = -1;  /* No file. */
   return __ssvfwscanf_r (ptr, &f, fmt, ap);
 }

newlib/libc/stdlib/arc4random.c

@@ -86,6 +86,8 @@ _rs_stir(void)
 {
 	u_char rnd[KEYSZ + IVSZ];
 
+	memset(rnd, 0, (KEYSZ + IVSZ) * sizeof(u_char));
+
 	if (getentropy(rnd, sizeof rnd) == -1)
 		_getentropy_fail();
 

newlib/libc/time/time.c

@@ -37,6 +37,8 @@ time (time_t * t)
 {
   struct timeval now;
 
+  now.tv_sec = (time_t) -1;
+
   if (_gettimeofday_r (_REENT, &now, NULL) < 0)
     now.tv_sec = (time_t) -1;