(gawk) Getline Intro

 
 Introduction to `getline'
 -------------------------
 
    This command is used in several different ways, and should _not_ be
 used by beginners.  It is covered here because this is the chapter on
 input.  The examples that follow the explanation of the `getline'
 command include material that has not been covered yet.  Therefore,
 come back and study the `getline' command _after_ you have reviewed the
 rest of this Info file and have a good knowledge of how `awk' works.
 
    `getline' returns one if it finds a record, and zero if the end of
 the file is encountered.  If there is some error in getting a record,
 such as a file that cannot be opened, then `getline' returns -1.  In
 this case, `gawk' sets the variable `ERRNO' to a string describing the
 error that occurred.
 
    In the following examples, COMMAND stands for a string value that
 represents a shell command.

Info Catalog

(gawk) Getline

(gawk) Plain Getline

automatically generated byinfo2html