stdin
Format
stdin = "filename:mode"Description
The stdin keyword specifies the filename and the access mode. The
access modes are read only (r). Specifying
stdin="NULL" closes STDIN_FILENO (fd:0) for
the process.
Example
stdin = "/tmp/stdin:r"Default
The system default is that the child process inherits its parent's stdin. The child process inherits PLMS's stdin.
Multiplicity
No instance or one instance in a task block.
Constraints
-
The value of stdin is evaluated during component runtime.
-
If stdin is specified, then tty is not allowed in the task.
-
If stdin is specified in a task, then the task must have one of the exec*() function so that stdin is used at run time.
-
The file must be readable by the task’s primary user or group. It cannot rely on permissions granted through supplementary groups, because those groups are applied only after the process starts. As a result, if the file is accessible only through a supplementary group, the process won’t be able to read from stdin at startup.