On Tue, Jul 04, 2023 at 12:58:13AM +0200, Marco Felsch wrote:
> Add [[ expression ]] support which allow pattern matching like:
>
> - [[ "foo1" == "foo*" ]]
It's a bit unfortunate that in barebox we require putting the pattern in
"", whereas in bash it only works without the "".
I guess there's not much we can do about this unless we turn the '['
command into a shell builtin.
> - [[ "foo" != "bar" ]]
>
> Signed-off-by: Marco Felsch <m.felsch@xxxxxxxxxxxxxx>
> ---
> commands/Kconfig | 13 +++++++++++++
> commands/test.c | 39 ++++++++++++++++++++++++++++++++++-----
> 2 files changed, 47 insertions(+), 5 deletions(-)
>
> diff --git a/commands/Kconfig b/commands/Kconfig
> index 4d3ff631a8..615e96aa9d 100644
> --- a/commands/Kconfig
> +++ b/commands/Kconfig
> @@ -1219,6 +1219,19 @@ config CMD_TEST
> !, =, !=, -eq, -ne, -ge, -gt, -le, -lt, -o, -a, -z, -n, -d, -e,
> -f, -L; see 'man test' on your PC for more information.
>
> +if CMD_TEST
> +
> +config CMD_TEST_BASH_COMP
> + tristate
> + select CONFIG_FNMATCH
> + prompt "test bash-compatibility"
> + help
> + Enable minimal support for bash compatible tests: [[ ]] to allow
> + pattern matching via: == and !=
> +
> +# end CMD_TEST
> +endif
> +
> config CMD_TRUE
> tristate
> default y
> diff --git a/commands/test.c b/commands/test.c
> index c1b84c42ef..77e15aeb03 100644
> --- a/commands/test.c
> +++ b/commands/test.c
> @@ -11,9 +11,13 @@
> #include <command.h>
> #include <fs.h>
> #include <linux/stat.h>
> +#ifdef CONFIG_CMD_TEST_BASH_COMP
> +#include <fnmatch.h>
> +#endif
No need to include this conditionally.
>
> typedef enum {
> OPT_EQUAL,
> + OPT_EQUAL_BASH,
> OPT_NOT_EQUAL,
> OPT_ARITH_EQUAL,
> OPT_ARITH_NOT_EQUAL,
> @@ -36,6 +40,7 @@ typedef enum {
>
> static char *test_options[] = {
> [OPT_EQUAL] = "=",
> + [OPT_EQUAL_BASH] = "==",
> [OPT_NOT_EQUAL] = "!=",
> [OPT_ARITH_EQUAL] = "-eq",
> [OPT_ARITH_NOT_EQUAL] = "-ne",
> @@ -67,18 +72,37 @@ static int parse_opt(const char *opt)
> return -1;
> }
>
> +static int string_comp(const char *left_op, const char *right_op, bool bash_test)
> +{
> +#ifdef CONFIG_CMD_TEST_BASH_COMP
> + if (bash_test)
> + return fnmatch(right_op, left_op, 0);
> +#endif
> + return strcmp(left_op, right_op);
> +}
> +
> static int do_test(int argc, char *argv[])
> {
> char **ap;
> int left, adv, expr, last_expr, neg, last_cmp, opt, zero;
> ulong a, b;
> struct stat statbuf;
> + bool bash_test = false;
>
> if (*argv[0] == '[') {
> argc--;
> - if (*argv[argc] != ']') {
> - printf("[: missing `]'\n");
> - return 1;
> + if (!strncmp(argv[0], "[[", 2)) {
> + if (strncmp(argv[argc], "]]", 2) != 0) {
> + printf("[[: missing `]]'\n");
> + return 1;
> + }
> + if (IS_ENABLED(CONFIG_CMD_TEST_BASH_COMP))
> + bash_test = true;
The if() is unnecessary.
Sascha
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