call after use.</para>
<para>If the <varname>pid</varname> parameter of any
- of these functions is passed as 0 the operation is
+ of these functions is passed as 0, the operation is
executed for the calling process.</para>
</refsect1>
<refsect1>
<title>Return Value</title>
- <para>On success these calls return 0 or a positive
+ <para>On success, these calls return 0 or a positive
integer. On failure, these calls return a negative
errno-style error code.</para>
</refsect1>