Re: [Qemu-devel] [PATCH V3] vl.c && linux-user/main.c : removed **envp from main() arguments

[Yoni Bettan <ybettan@redhat.com>]

On 12/19/2017 12:11 PM, Yoni Bettan wrote:
> it was added on 2008 902b3d5c39 when introduced cache-utils.[ch]
>
> since then cache-utils.[ch] were removed but **envp was left
> behind.
>
> By the way "to be portable it is best to write main to take two
> arguments, and use the value of environ" according to
> https://www.gnu.org/software/libc/manual/html_node/Program-\
>        Arguments.html#Program-Arguments
>
> Signed-off-by: Yoni Bettan <ybettan@redhat.com>
> ---
>
> V2 -> V3:
>      
>      since ui/cocoa.c rename main() is using qemu_main() ,because it uses it
>      inside its main() function, the function qemu_main() can't be removed
>    
>
> V1 -> V2:
>
>      removed the ui/cocoa.c renaming of main() function since i thought that we
>      no longer need qemu_main()
>
>
>   include/qemu-common.h | 2 +-
>   linux-user/main.c     | 2 +-
>   ui/cocoa.m            | 5 ++---
>   vl.c                  | 7 +++----
>   4 files changed, 7 insertions(+), 9 deletions(-)

Notes:
1. I didn't checked the patch on Mac OS due to some difficulties to run
     Mac OS gust as host (make check passed successfully)
2. checkpatch.pl seems to not work well when touching extern variables
>
> diff --git a/include/qemu-common.h b/include/qemu-common.h
> index 05319b9ddc..8a5b7ec5ec 100644
> --- a/include/qemu-common.h
> +++ b/include/qemu-common.h
> @@ -29,7 +29,7 @@
>   
>   /* main function, renamed */
>   #if defined(CONFIG_COCOA)
> -int qemu_main(int argc, char **argv, char **envp);
> +int qemu_main(int argc, char **argv);
>   #endif
>   
>   void qemu_get_timedate(struct tm *tm, int offset);
> diff --git a/linux-user/main.c b/linux-user/main.c
> index 6286661bd3..fe81d410da 100644
> --- a/linux-user/main.c
> +++ b/linux-user/main.c
> @@ -4237,7 +4237,7 @@ static int parse_args(int argc, char **argv)
>       return optind;
>   }
>   
> -int main(int argc, char **argv, char **envp)
> +int main(int argc, char **argv)
>   {
>       struct target_pt_regs regs1, *regs = &regs1;
>       struct image_info info1, *info = &info1;
> diff --git a/ui/cocoa.m b/ui/cocoa.m
> index 330ccebf90..4d18153659 100644
> --- a/ui/cocoa.m
> +++ b/ui/cocoa.m
> @@ -25,7 +25,6 @@
>   #include "qemu/osdep.h"
>   
>   #import <Cocoa/Cocoa.h>
> -#include <crt_externs.h>
>   
>   #include "qemu-common.h"
>   #include "ui/console.h"
> @@ -1050,7 +1049,7 @@ QemuCocoaView *cocoaView;
>       COCOA_DEBUG("QemuCocoaAppController: startEmulationWithArgc\n");
>   
>       int status;
> -    status = qemu_main(argc, argv, *_NSGetEnviron());
> +    status = qemu_main(argc, argv);
>       exit(status);
>   }
>   
> @@ -1391,7 +1390,7 @@ int main (int argc, const char * argv[]) {
>                   !strcmp(opt, "-curses") ||
>                   !strcmp(opt, "-display") ||
>                   !strcmp(opt, "-qtest")) {
> -                return qemu_main(gArgc, gArgv, *_NSGetEnviron());
> +                return qemu_main(gArgc, gArgv);
>               }
>           }
>       }
> diff --git a/vl.c b/vl.c
> index fc8bd9372f..ea17cc34f6 100644
> --- a/vl.c
> +++ b/vl.c
> @@ -35,10 +35,10 @@
>   #ifdef CONFIG_SDL
>   #if defined(__APPLE__) || defined(main)
>   #include <SDL.h>
> -int qemu_main(int argc, char **argv, char **envp);
> +int qemu_main(int argc, char **argv);
>   int main(int argc, char **argv)
>   {
> -    return qemu_main(argc, argv, NULL);
> +    return qemu_main(argc, argv);
>   }
>   #undef main
>   #define main qemu_main
> @@ -50,7 +50,6 @@ int main(int argc, char **argv)
>   #define main qemu_main
>   #endif /* CONFIG_COCOA */
>   
> -
>   #include "qemu/error-report.h"
>   #include "qemu/sockets.h"
>   #include "hw/hw.h"
> @@ -3044,7 +3043,7 @@ static void register_global_properties(MachineState *ms)
>       user_register_global_props();
>   }
>   
> -int main(int argc, char **argv, char **envp)
> +int main(int argc, char **argv)
>   {
>       int i;
>       int snapshot, linux_boot;