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Re: [PATCH v2 42/43] bsd-user: Add '-0 argv0' option to bsd-user/main.c
From: |
Philippe Mathieu-Daudé |
Subject: |
Re: [PATCH v2 42/43] bsd-user: Add '-0 argv0' option to bsd-user/main.c |
Date: |
Fri, 27 Aug 2021 06:48:05 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 |
On 8/26/21 11:12 PM, imp@bsdimp.com wrote:
> From: Colin Percival <cperciva@tarsnap.com>
>
> Previously it was impossible to emulate a program with a file name
> different from its argv[0]. With this change, you can run
> qemu -0 fakename realname args
> which runs the program "realname" with an argv of "fakename args".
>
> Signed-off-by: Colin Percival <cperciva@tarsnap.com>
> Signed-off-by: Warner Losh <imp@bsdimp.com>
> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> bsd-user/main.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/bsd-user/main.c b/bsd-user/main.c
> index b35bcf4d1e..ae25f4c773 100644
> --- a/bsd-user/main.c
> +++ b/bsd-user/main.c
> @@ -268,6 +268,7 @@ int main(int argc, char **argv)
> char **target_environ, **wrk;
> envlist_t *envlist = NULL;
> bsd_type = HOST_DEFAULT_BSD_TYPE;
> + char * argv0 = NULL;
>
> adjust_ssize();
>
> @@ -390,6 +391,8 @@ int main(int argc, char **argv)
> do_strace = 1;
> } else if (!strcmp(r, "trace")) {
> trace_opt_parse(optarg);
> + } else if (!strcmp(r, "0")) {
> + argv0 = argv[optind++];
> } else {
> usage();
> }
> @@ -413,6 +416,8 @@ int main(int argc, char **argv)
> usage();
> }
> filename = argv[optind];
> + if (argv0)
Style:
{
> + argv[optind] = argv0;
}
>
> if (!trace_init_backends()) {
> exit(1);
>
- [PATCH v2 27/43] bsd-user: Move stack initializtion into a per-os file., (continued)
[PATCH v2 36/43] bsd-user: add stubbed out core dump support, imp, 2021/08/26
[PATCH v2 38/43] bsd-user: Refactor load_elf_sections and is_target_elf_binary, imp, 2021/08/26
[PATCH v2 42/43] bsd-user: Add '-0 argv0' option to bsd-user/main.c, imp, 2021/08/26
- Re: [PATCH v2 42/43] bsd-user: Add '-0 argv0' option to bsd-user/main.c,
Philippe Mathieu-Daudé <=
[PATCH v2 37/43] bsd-user: elfload.c style catch up patch, imp, 2021/08/26
[PATCH v2 41/43] bsd-user: Implement cpu_copy() helper routine, imp, 2021/08/26
[PATCH v2 35/43] bsd-user: Add target_os_user.h to capture the user/kernel structures, imp, 2021/08/26
[PATCH v2 23/43] bsd-user: define max args in terms of pages, imp, 2021/08/26
[PATCH v2 40/43] bsd-user: Implement interlock for atomic operations, imp, 2021/08/26