2 files changed, 29 insertions, 21 deletions

diff --git a/util/libreboot-utils/lib/file.c b/util/libreboot-utils/lib/file.c
index 986bf788..efc23ba9 100644
--- a/util/libreboot-utils/lib/file.c
+++ b/util/libreboot-utils/lib/file.c
@@ -717,9 +717,29 @@ xclose(int *fd)
 	if (*fd < 0)
 		return;
 
+	/* nuance regarding EINTR on close():
+	 * EINTR can be set on error, but there's
+	 * no guarantee whether the fd is then still
+	 * open or closed. on some other commands, we
+	 * loop EINTR, but for close, we instead skip
+	 * aborting *if the errno is EINTR* - so don't
+	 * loop it, but do regard EINTR with rval -1
+	 * as essenitally a successful close()
+	 */
+
+	/* because we don't want to mess with someone
+	 * elses file if that fd is then reassigned.
+	 * if the operation truly did fail, we ignore
+	 * it. just leave it flying in the wind */
+
 	errno = 0;
-	if ((rval = close(*fd)) < 0)
-		exitf("xclose: could not close");
+	if ((rval = close(*fd)) < 0) {
+		if (errno != EINTR)
+			exitf("xclose: could not close");
+
+		/* regard EINTR as a successful close */
+		rval = 0;
+	}
 
 	*fd = -1;
 
@@ -762,18 +782,6 @@ xclose(int *fd)
  */
 
 
-/* retry switch for offset-based
- * functions e.g. lseek
- */
-/* retry switch for functions that
-   return long status e.g. linux syscall
- */
-int
-off_retry(int saved_errno, off_t rval)
-{
-	fs_err_retry();
-}
-
 /* retry switch for functions that
    return long status e.g. linux syscall
  */
diff --git a/util/libreboot-utils/lib/rand.c b/util/libreboot-utils/lib/rand.c
index 153798f6..bf090b43 100644
--- a/util/libreboot-utils/lib/rand.c
+++ b/util/libreboot-utils/lib/rand.c
@@ -156,24 +156,24 @@ retry_rand: {
 
 #if defined(USE_URANDOM) && \
     ((USE_URANDOM) > 0)
-	ssize_t rc;
+	ssize_t rval;
 	int fd = -1;
 
 	open_file_on_eintr("/dev/urandom", &fd, O_RDONLY, 0400, NULL);
 
 	while (rw_retry(saved_errno,
-	    rc = rw(fd, (unsigned char *)buf + off, n - off, 0, IO_READ)));
+	    rval = rw(fd, (unsigned char *)buf + off, n - off, 0, IO_READ)));
 #elif defined(__linux__)
-	long rc;
+	long rval;
 	while (sys_retry(saved_errno,
-		rc = syscall(SYS_getrandom,
+		rval = syscall(SYS_getrandom,
 		    (unsigned char *)buf + off, n - off, 0)));
 #else
 #error Unsupported operating system (possibly unsecure randomisation)
 #endif
 
-	if (rc < 0 || /* syscall fehler */
-	    rc == 0) { /* prevent infinite loop on fatal err */
+	if (rval < 0 || /* syscall fehler */
+	    rval == 0) { /* prevent infinite loop on fatal err */
 #if defined(USE_URANDOM) && \
     ((USE_URANDOM) > 0)
 		xclose(&fd);
@@ -181,7 +181,7 @@ retry_rand: {
 		goto err;
 	}
 
-	if ((off += (size_t)rc) < n)
+	if ((off += (size_t)rval) < n)
 		goto retry_rand;
 
 #if defined(USE_URANDOM) && \