[Xen-changelog] [xen master] tools/xentoollog: update tty detection in stdiostream_progress

[patchbot@xxxxxxx]

commit 2f80ac9c0e8fe117b3e9cf71f799b482c6ca312f
Author:     Olaf Hering <olaf@xxxxxxxxx>
AuthorDate: Wed Feb 27 14:16:36 2013 +0000
Commit:     Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
CommitDate: Thu Feb 28 16:13:46 2013 +0000

    tools/xentoollog: update tty detection in stdiostream_progress
    
    As suggested by IanJ:
    Check isatty only once to preserve the errno of ->progress users, and to
    reduce the noice in strace output.
    
    Signed-off-by: Olaf Hering <olaf@xxxxxxxxx>
    Acked-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
---
 tools/libxc/xtl_logger_stdio.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/tools/libxc/xtl_logger_stdio.c b/tools/libxc/xtl_logger_stdio.c
index 25b2464..2e73c86 100644
--- a/tools/libxc/xtl_logger_stdio.c
+++ b/tools/libxc/xtl_logger_stdio.c
@@ -35,6 +35,7 @@ struct xentoollog_logger_stdiostream {
     xentoollog_level min_level;
     unsigned flags;
     int progress_erase_len, progress_last_percent;
+    int tty;
 };
 
 static void progress_erase(xentoollog_logger_stdiostream *lg) {
@@ -118,7 +119,7 @@ static void stdiostream_progress(struct xentoollog_logger 
*logger_in,
 
     lg->progress_last_percent = percent;
 
-    if (isatty(fileno(lg->f)) <= 0) {
+    if (!lg->tty) {
         stdiostream_message(logger_in, this_level, context,
                             "%s: %lu/%lu  %3d%%",
                             doing_what, done, total, percent);
@@ -166,6 +167,7 @@ xentoollog_logger_stdiostream *xtl_createlogger_stdiostream
     newlogger.f = f;
     newlogger.min_level = min_level;
     newlogger.flags = flags;
+    newlogger.tty = isatty(fileno(newlogger.f)) > 0;
 
     if (newlogger.flags & XTL_STDIOSTREAM_SHOW_DATE) tzset();
 
--
generated by git-patchbot for /home/xen/git/xen.git#master

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