TCL, File's Input & Output

[Procedure]

• Open file --> Read/Write file --> Close file

[Syntax] 

• Open ==> open filename "access"
• Write ==> puts filename "content"
• Close ==> close filename

[Example code]

• set fd [open "$PATH/$var_sn.tmp.log" a] 
• puts $fd "[time_str]: $msg"
• close $fd

[Access Parameter List]

• r : Reading a existing file
• r+ : Reading & Writing a existing file
• w : Empty a existing file,  and Writing the content.
• w:  Establish a new file, and Writing the content.
• w+ : Empty a existing file, and Writing & Reading the content.
• w+ : Establish a new file, and Writing & Reading the content.
• a : Append the content into the end of existing file, or Establish a new one.
• a+ : Append (Read & Write) the content into the end of existing file, or Establish a new one.

End.

Example 2-:



Example 1-180515:
Copy from [SourceFile_content] to [TargetFile]

# set   sourceFile_tmp   [ open  SourceFile.tcl   r ]
# set   sourceFile           [ read   $sourceFile_tmp ]

# set   targetFile   [ open   TargetFile.tcl  w ]
# puts  $targetFile  $sourceFile