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Diffstat (limited to 'shell/ash_test/ash-vars/var_bash4.tests')
-rwxr-xr-x | shell/ash_test/ash-vars/var_bash4.tests | 51 |
1 files changed, 46 insertions, 5 deletions
diff --git a/shell/ash_test/ash-vars/var_bash4.tests b/shell/ash_test/ash-vars/var_bash4.tests index 3b323c5..01a0def 100755 --- a/shell/ash_test/ash-vars/var_bash4.tests +++ b/shell/ash_test/ash-vars/var_bash4.tests @@ -1,6 +1,47 @@ -FOO='a*b\*c' -BAR=${FOO//\\*/-backslashstar-} -echo In assignment: "$BAR" -echo Unquoted: ${FOO//\\*/-backslashstar-} -echo Quoted: "${FOO//\\*/-backslashstar-}" +# This testcase demonstrates that backslashes are treated differently +# in 1st and 2nd parts of ${var/search/repl}: +# if quoted: "${var/search/repl}", and repl contains \a (a non-special char), +# the backslash in repl stays; if unquoted, backslash: removed +# But search part does not act like that: \a is always converted to just a, +# even in quotes. +# +# bash4 (and probably bash3 too) result: "Quoted:" results are different - +# they have extra backslash before z. + +v='a*b\*c' +echo 'Source: ' "$v" +echo 'Replace str: ' '_\\_\z_' + +echo 'Pattern: ' 'single backslash and star: "replace literal star"' +r=${v/\*/_\\_\z_} +echo 'In assignment:' "$r" +echo 'Unquoted: ' ${v/\*/_\\_\z_} +echo 'Quoted: ' "${v/\*/_\\_\z_}" + +echo 'Pattern: ' 'double backslash and star: "replace backslash and everything after it"' +r=${v/\\*/_\\_\z_} +echo 'In assignment:' "$r" +echo 'Unquoted: ' ${v/\\*/_\\_\z_} +echo 'Quoted: ' "${v/\\*/_\\_\z_}" + +echo + +v='a\bc' +echo 'Source: ' "$v" +echo 'Replace str: ' '_\\_\z_' + +echo 'Pattern: ' 'single backslash and b: "replace literal b"' +r=${v/\b/_\\_\z_} +echo 'In assignment:' "$r" +echo 'Unquoted: ' ${v/\b/_\\_\z_} +echo 'Quoted: ' "${v/\b/_\\_\z_}" + +echo 'Pattern: ' 'double backslash and b: "replace backslash and b"' +r=${v/\\b/_\\_\z_} +echo 'In assignment:' "$r" +echo 'Unquoted: ' ${v/\\b/_\\_\z_} +echo 'Quoted: ' "${v/\\b/_\\_\z_}" + +echo + echo Done: $? |