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[PATCH v2 42/43] bsd-user: Add '-0 argv0' option to bsd-user/main.c
From: |
imp |
Subject: |
[PATCH v2 42/43] bsd-user: Add '-0 argv0' option to bsd-user/main.c |
Date: |
Thu, 26 Aug 2021 15:12:00 -0600 |
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)
+ argv[optind] = argv0;
if (!trace_init_backends()) {
exit(1);
--
2.32.0
- [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 <=
[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