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| -rw-r--r-- | manual/signal.texi | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/manual/signal.texi b/manual/signal.texi index 2c06c6ca2d..1d28f74027 100644 --- a/manual/signal.texi +++ b/manual/signal.texi @@ -2083,9 +2083,12 @@ temporary failure, with the macro @code{TEMP_FAILURE_RETRY}: @comment unistd.h @comment GNU @defmac TEMP_FAILURE_RETRY (@var{expression}) -This macro evaluates @var{expression} once. If it fails and reports -error code @code{EINTR}, @code{TEMP_FAILURE_RETRY} evaluates it again, -and over and over until the result is not a temporary failure. +This macro evaluates @var{expression} once, and examines its value as +type @code{long int}. If the value equals @code{-1}, that indicates a +failure and @code{errno} should be set to show what kind of failure. +If it fails and reports error code @code{EINTR}, +@code{TEMP_FAILURE_RETRY} evaluates it again, and over and over until +the result is not a temporary failure. The value returned by @code{TEMP_FAILURE_RETRY} is whatever value @var{expression} produced. |