awk - Unix, Linux Command---reference

发布时间：2021-01-25 11:25:42 所属栏目：Linux 来源：网络整理

导读：副标题#e# http://www.tutorialspoint.com/unix_commands/awk.htm gawk - pattern scanning and processing language gawk?[?POSIX?or?GNU?style options ]?-f? program-file ?[?--?] file ...?gawk?[?POSIX?or?GNU?style options ] [?--?]? program-text ?

Additional output redirections are allowed for?print?and?printf.

>?filefile.?command?commandThe?getline?command returns 0 on end of file and -1 on an error. Upon an error,?ERRNOcontains a string describing the problem.

NOTE:?If using a pipe or co-process to?getline,or from?print?or?printf?within a loop,youmust?use?close()?to create new instances of the command.?AWK?does not automatically close pipes or co-processes when they return EOF.

The printf Statement

The?AWK?versions of the?printf?statement and?sprintf()?function (see below) accept the following conversion specification formats:

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