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govis: support double quote escapes

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This is supported by both OpenBSD and FreBSD so it seems possible that
we will run into \" sequences at some point. The handling is basically
identical to \\ sequences.

Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
This commit is contained in:
Aleksa Sarai 2025-09-23 17:27:24 +10:00
parent 7e2695a1be
commit bd7b72e037
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GPG key ID: 2897FAD2B7E9446F
5 changed files with 27 additions and 19 deletions
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21
pkg/govis/govis.go
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@ -32,16 +32,17 @@ type VisFlag uint
// mtree only uses one set of flags, implementing them all is necessary in
// order to have compatibility with BSD's vis() and unvis() commands.
const (
VisOctal VisFlag = (1 << iota) // VIS_OCTAL: Use octal \ddd format.
VisCStyle // VIS_CSTYLE: Use \[nrft0..] where appropriate.
VisSpace // VIS_SP: Also encode space.
VisTab // VIS_TAB: Also encode tab.
VisNewline // VIS_NL: Also encode newline.
VisSafe // VIS_SAFE: Encode unsafe characters.
VisNoSlash // VIS_NOSLASH: Inhibit printing '\'.
VisHTTPStyle // VIS_HTTPSTYLE: HTTP-style escape %xx.
VisGlob // VIS_GLOB: Encode glob(3) magics.
visMask VisFlag = (1 << iota) - 1 // Mask of all flags.
VisOctal VisFlag = (1 << iota) // VIS_OCTAL: Use octal \ddd format.
VisCStyle // VIS_CSTYLE: Use \[nrft0..] where appropriate.
VisSpace // VIS_SP: Also encode space.
VisTab // VIS_TAB: Also encode tab.
VisNewline // VIS_NL: Also encode newline.
VisSafe // VIS_SAFE: Encode unsafe characters.
VisNoSlash // VIS_NOSLASH: Inhibit printing '\'.
VisHTTPStyle // VIS_HTTPSTYLE: HTTP-style escape %xx.
VisGlob // VIS_GLOB: Encode glob(3) magics.
VisDoubleQuote // VIS_DQ: Encode double-quotes (").
visMask VisFlag = (1 << iota) - 1 // Mask of all flags.
VisWhite VisFlag = (VisSpace | VisTab | VisNewline)
)