Re: [PATCH v7 3/4] lib/cmdline.c Remove quotes symmetrically.

Baoquan He
2017-08-21T10:27:20Z

On 08/17/17 at 10:14pm, Michal Suchanek wrote:
> Remove quotes from argument value only if there is qoute on both sides.
>
> Signed-off-by: Michal Suchanek <msuchanek@suse.de>

Sounds reasonable. Just for curiosity, do we have chance to pass in
option with a single '"'?

> ---
> arch/powerpc/kernel/fadump.c | 6 ++----
> lib/cmdline.c | 7 ++-----
> 2 files changed, 4 insertions(+), 9 deletions(-)
>
> diff --git a/arch/powerpc/kernel/fadump.c b/arch/powerpc/kernel/fadump.c
> index a1614d9b8a21..d7da4ce9f7ae 100644
> --- a/arch/powerpc/kernel/fadump.c
> +++ b/arch/powerpc/kernel/fadump.c
> @@ -489,10 +489,8 @@ static void __init fadump_update_params(struct param_info *param_info,
> *tgt++ = ' ';
>
> /* next_arg removes one leading and one trailing '"' */
> - if (*tgt == '"')
> - shortening += 1;
> - if (*(tgt + vallen + shortening) == '"')
> - shortening += 1;
> + if ((*tgt == '"') && (*(tgt + vallen + shortening) == '"'))
> + shortening += 2;
>
> /* remove one leading and one trailing quote if both are present */
> if ((val[0] == '"') && (val[vallen - 1] == '"')) {
> diff --git a/lib/cmdline.c b/lib/cmdline.c
> index 4c0888c4a68d..01e701b2afe8 100644
> --- a/lib/cmdline.c
> +++ b/lib/cmdline.c
> @@ -227,14 +227,11 @@ char *next_arg(char *args, char **param, char **val)
> *val = args + equals + 1;
>
> /* Don't include quotes in value. */
> - if (**val == '"') {
> + if ((**val == '"') && (args[i-1] == '"')) {
> (*val)++;
> - if (args[i-1] == '"')
> - args[i-1] = '\0';
> + args[i-1] = '\0';
> }
> }
> - if (quoted && args[i-1] == '"')
> - args[i-1] = '\0';
>
> if (args[i]) {
> args[i] = '\0';
> --
> 2.10.2
>