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awk and gawkThis chapter covers how to run awk, both POSIX-standard
and gawk-specific command-line options, and what
awk and
gawk do with nonoption arguments.
It then proceeds to cover how gawk searches for source files,
reading standard input along with other files, gawk’s
environment variables, gawk’s exit status, using include files,
and obsolete and undocumented options and/or features.
Many of the options and features described here are discussed in more detail later in the Web page; feel free to skip over things in this chapter that don’t interest you right now.
| • Command Line: | How to run awk.
| |
| • Options: | Command-line options and their meanings. | |
| • Other Arguments: | Input file names and variable assignments. | |
| • Naming Standard Input: | How to specify standard input with other files. | |
| • Environment Variables: | The environment variables gawk uses.
| |
| • Exit Status: | gawk’s exit status.
| |
| • Include Files: | Including other files into your program. | |
| • Loading Shared Libraries: | Loading shared libraries into your program. | |
| • Obsolete: | Obsolete Options and/or features. | |
| • Undocumented: | Undocumented Options and Features. | |
| • Invoking Summary: | Invocation summary. |