s6-portable-utils: the s6-format-filter program
Keywords: s6-portable-utils command s6-format filter printf format

s6-portable-utils
Software
skarnet.org

# The `s6-format-filter` program

s6-format-filter processes lines according to its arguments, and prints the result.

## Interface

         s6-format-filter format [ args... ]

- format is a format string that can contain the following special sequences: `%%`, `%s`, and `%0` to `%9`.
- For every line it reads on stdin, s6-format-filter prints format on stdout, replacing `%%` with `%`, `%0` with the command name (probably `s6-format-filter`), `%1` to `%9` with the first to the ninth argument in args, and `%s` with the input line.
- s6-format-filter exits 0 when it reads EOF.