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Diffstat (limited to 'manual/pipe.texi')
| -rw-r--r-- | manual/pipe.texi | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/manual/pipe.texi b/manual/pipe.texi index 773dc4aac8..274b93d427 100644 --- a/manual/pipe.texi +++ b/manual/pipe.texi @@ -113,7 +113,7 @@ function; see @ref{Running a Command}. It executes the shell command command to complete, it creates a pipe to the subprocess and returns a stream that corresponds to that pipe. -If you specify a @var{mode} argument of @code{"r"}, you can read from the +If you specify a @var{mode} argument of @code{"r"}, you can read from the stream to retrieve data from the standard output channel of the subprocess. The subprocess inherits its standard input channel from the parent process. @@ -193,11 +193,11 @@ system. @section Atomicity of Pipe I/O Reading or writing pipe data is @dfn{atomic} if the size of data written -is less than @code{PIPE_BUF}. This means that the data transfer seems -to be an instantaneous unit, in that nothing else in the system can -observe a state in which it is partially complete. Atomic I/O may not -begin right away (it may need to wait for buffer space or for data), but -once it does begin, it finishes immediately. +is not greater than @code{PIPE_BUF}. This means that the data transfer +seems to be an instantaneous unit, in that nothing else in the system +can observe a state in which it is partially complete. Atomic I/O may +not begin right away (it may need to wait for buffer space or for data), +but once it does begin, it finishes immediately. Reading or writing a larger amount of data may not be atomic; for example, output data from other processes sharing the descriptor may be |