NMRWish Built-In TCL Functions
sysOpen: Open a binary data file or pipeline command for reading or writing. See also: sysRead, sysWrite, sysClose.

sysOpen fileName openMode
sysOpen !pipeCommandName pipeMode
  Values for openMode (use one or more):
  r READ: Open for reading.
  w WRITE: Write, Create if needed.
  a APPEND: Starting at end of existing data.
  t TRUNC: Delete existing data.
  Values for pipeMode: (Use only one):
  r Read from Pipe.
  w Write to pipe.

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