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But it _still_ doesn't pass! quoted case is a tough nut to crack function old new delta redirect 1281 1286 +5 subevalvar 1141 1142 +1 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
48 lines
1.4 KiB
Plaintext
Executable File
48 lines
1.4 KiB
Plaintext
Executable File
# This testcase demonstrates that backslashes are treated differently
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# in 1st and 2nd parts of ${var/search/repl}:
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# if quoted ("${var/search/repl}"), and repl contains \a (a non-special char),
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# the backslash in repl stays; if unquoted, backslash is removed.
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# But search part does not act like that: \a is always converted to just a,
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# even in quotes.
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#
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# bash4 (and probably bash3 too): "Quoted:" results are different from
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# unquoted and assignment expansions - they have a backslash before z.
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v='a*b\*c'
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echo 'Source: ' "$v"
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echo 'Replace str: ' '_\\_\z_'
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echo 'Pattern: ' 'single backslash and star: "replace literal star"'
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r=${v/\*/_\\_\z_}
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echo 'In assignment:' "$r"
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echo 'Unquoted: ' ${v/\*/_\\_\z_}
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echo 'Quoted: ' "${v/\*/_\\_\z_}"
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echo 'Pattern: ' 'double backslash and star: "replace backslash and everything after it"'
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r=${v/\\*/_\\_\z_}
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echo 'In assignment:' "$r"
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echo 'Unquoted: ' ${v/\\*/_\\_\z_}
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echo 'Quoted: ' "${v/\\*/_\\_\z_}"
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echo
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v='a\bc'
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echo 'Source: ' "$v"
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echo 'Replace str: ' '_\\_\z_'
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echo 'Pattern: ' 'single backslash and b: "replace b"'
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r=${v/\b/_\\_\z_}
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echo 'In assignment:' "$r"
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echo 'Unquoted: ' ${v/\b/_\\_\z_}
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echo 'Quoted: ' "${v/\b/_\\_\z_}"
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echo 'Pattern: ' 'double backslash and b: "replace backslash and b"'
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r=${v/\\b/_\\_\z_}
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echo 'In assignment:' "$r"
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echo 'Unquoted: ' ${v/\\b/_\\_\z_}
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echo 'Quoted: ' "${v/\\b/_\\_\z_}"
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echo
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echo Done: $?
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