Info Catalog gawk: V7/SVR3 gawk: Language History gawk: POSIX

gawk: SVR4

 
 A.2 Changes Between SVR3.1 and SVR4
 ===================================
 
 The System V Release 4 (1989) version of Unix 'awk' added these features
 (some of which originated in 'gawk'):
 
    * The 'ENVIRON' array (Built-in Variables)
 
    * Multiple '-f' options on the command line (Options)
 
    * The '-v' option for assigning variables before program execution
      begins (Options)
 
    * The '--' signal for terminating command-line options
 
      Sequences::)
 
      Numeric Functions::)
 
    * The 'toupper()' and 'tolower()' built-in string functions for case
      translation (String Functions)
 
    * A cleaner specification for the '%c' format-control letter in the
      'printf' function (Control Letters)
 
    * The ability to dynamically pass the field width and precision
      Control Letters::)
 
    * The use of regexp constants, such as '/foo/', as expressions, where
      they are equivalent to using the matching operator, as in '$0 ~
      /foo/' (Using Constant Regexps)
 
    * Processing of escape sequences inside command-line variable
      assignments (Assignment Options)
 

Info Catalog gawk: V7/SVR3 gawk: Language History gawk: POSIX