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| author | Denys Vlasenko | 2018-04-10 15:25:41 +0200 |
|---|---|---|
| committer | Denys Vlasenko | 2018-04-10 15:25:41 +0200 |
| commit | 3632cb15f16a7596a68dccfd66a2ad9496bf9fd9 (patch) | |
| tree | b1725852f1437a684c87e082ca20190819d2ddc6 /shell/ash.c | |
| parent | 4709df0f152c477c191f83e18bfecabb2fb2c1f9 (diff) | |
| download | busybox-3632cb15f16a7596a68dccfd66a2ad9496bf9fd9.zip busybox-3632cb15f16a7596a68dccfd66a2ad9496bf9fd9.tar.gz | |
shell: add comments about [[, no code changes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'shell/ash.c')
| -rw-r--r-- | shell/ash.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/shell/ash.c b/shell/ash.c index 45c747d..713219b 100644 --- a/shell/ash.c +++ b/shell/ash.c @@ -197,7 +197,20 @@ #define IF_BASH_PATTERN_SUBST IF_ASH_BASH_COMPAT #define BASH_SUBSTR ENABLE_ASH_BASH_COMPAT #define IF_BASH_SUBSTR IF_ASH_BASH_COMPAT -/* [[ EXPR ]] */ +/* BASH_TEST2: [[ EXPR ]] + * Status of [[ support: + * We replace && and || with -a and -o + * TODO: + * singleword+noglob expansion: + * v='a b'; [[ $v = 'a b' ]]; echo 0:$? + * [[ /bin/* ]]; echo 0:$? + * -a/-o are not AND/OR ops! (they are just strings) + * quoting needs to be considered (-f is an operator, "-f" and ""-f are not; etc) + * = is glob match operator, not equality operator: STR = GLOB + * (in GLOB, quoting is significant on char-by-char basis: a*cd"*") + * == same as = + * add =~ regex match operator: STR =~ REGEX + */ #define BASH_TEST2 (ENABLE_ASH_BASH_COMPAT * ENABLE_ASH_TEST) #define BASH_SOURCE ENABLE_ASH_BASH_COMPAT #define BASH_PIPEFAIL ENABLE_ASH_BASH_COMPAT |