Echo messages to syslog only if stderr is not connected to a terminal.

git-svn-id: http://exfat.googlecode.com/svn/trunk@280 60bc1c72-a15a-11de-b98f-4500b42dc123

diff --git a/libexfat/log.c b/libexfat/log.c
index 7a2b35d..ef80bc8 100644 (file)
--- a/libexfat/log.c
+++ b/libexfat/log.c
@@ -21,6 +21,7 @@
 #include "exfat.h"
 #include <stdarg.h>
 #include <syslog.h>
+#include <unistd.h>
 
 int exfat_errors;
 
@@ -40,7 +41,8 @@ void exfat_bug(const char* format, ...)
        va_end(ap);
        fputs(".\n", stderr);
 
-       vsyslog(LOG_CRIT, format, aq);
+       if (!isatty(STDERR_FILENO))
+               vsyslog(LOG_CRIT, format, aq);
        va_end(aq);
 
        abort();
@@ -63,7 +65,8 @@ void exfat_error(const char* format, ...)
        va_end(ap);
        fputs(".\n", stderr);
 
-       vsyslog(LOG_ERR, format, aq);
+       if (!isatty(STDERR_FILENO))
+               vsyslog(LOG_ERR, format, aq);
        va_end(aq);
 }
 
@@ -84,7 +87,8 @@ void exfat_warn(const char* format, ...)
        va_end(ap);
        fputs(".\n", stderr);
 
-       vsyslog(LOG_WARNING, format, aq);
+       if (!isatty(STDERR_FILENO))
+               vsyslog(LOG_WARNING, format, aq);
        va_end(aq);
 }