(gawk.info.gz) SVR4

Info Catalog (gawk.info.gz) V7/SVR3 (gawk.info.gz) Language History (gawk.info.gz) POSIX
 
 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 `--' option for terminating command-line options.
 
    * The `\a', `\v', and `\x' escape sequences ( Escape
      Sequences).
 
    * A defined return value for the `srand()' built-in function (
      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
      (`"%*.*d"') in the argument list of the `printf' function (
      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.info.gz) V7/SVR3 (gawk.info.gz) Language History (gawk.info.gz) POSIX
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