[3320] | 1 | # This testcase demonstrates that backslashes are treated differently
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| 2 | # in 1st and 2nd parts of ${var/search/repl}:
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| 3 | # if quoted ("${var/search/repl}"), and repl contains \a (a non-special char),
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| 4 | # the backslash in repl stays; if unquoted, backslash is removed.
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| 5 | # But search part does not act like that: \a is always converted to just a,
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| 6 | # even in quotes.
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| 7 | #
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| 8 | # bash4 (and probably bash3 too): "Quoted:" results are different from
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| 9 | # unquoted and assignment expansions - they have a backslash before z.
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| 10 |
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| 11 | v='a*b\*c'
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| 12 | echo 'Source: ' "$v"
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| 13 | echo 'Replace str: ' '_\\_\z_'
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| 14 |
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| 15 | echo 'Pattern: ' 'single backslash and star: "replace literal star"'
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| 16 | r=${v/\*/_\\_\z_}
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| 17 | echo 'In assignment:' "$r"
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| 18 | echo 'Unquoted: ' ${v/\*/_\\_\z_}
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| 19 | echo 'Quoted: ' "${v/\*/_\\_\z_}"
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| 20 |
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| 21 | echo 'Pattern: ' 'double backslash and star: "replace backslash and everything after it"'
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| 22 | r=${v/\\*/_\\_\z_}
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| 23 | echo 'In assignment:' "$r"
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| 24 | echo 'Unquoted: ' ${v/\\*/_\\_\z_}
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| 25 | echo 'Quoted: ' "${v/\\*/_\\_\z_}"
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| 26 |
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| 27 | echo
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| 28 |
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| 29 | v='a\bc'
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| 30 | echo 'Source: ' "$v"
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| 31 | echo 'Replace str: ' '_\\_\z_'
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| 32 |
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| 33 | echo 'Pattern: ' 'single backslash and b: "replace b"'
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| 34 | r=${v/\b/_\\_\z_}
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| 35 | echo 'In assignment:' "$r"
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| 36 | echo 'Unquoted: ' ${v/\b/_\\_\z_}
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| 37 | echo 'Quoted: ' "${v/\b/_\\_\z_}"
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| 38 |
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| 39 | echo 'Pattern: ' 'double backslash and b: "replace backslash and b"'
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| 40 | r=${v/\\b/_\\_\z_}
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| 41 | echo 'In assignment:' "$r"
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| 42 | echo 'Unquoted: ' ${v/\\b/_\\_\z_}
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| 43 | echo 'Quoted: ' "${v/\\b/_\\_\z_}"
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| 44 |
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| 45 | echo
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| 46 |
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| 47 | echo Done: $?
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