Re: [Qemu-devel] [PATCH 15/16] os-posix: cleanup: Replace perror with error_report

[Philippe Mathieu-Daudé]

On 04/19/2018 01:45 PM, Ian Jackson wrote:
> perror() is defined to fprintf(stderr,...).  HACKING says
> fprintf(stderr,...) is wrong.  So perror() is too.
> 
> Signed-off-by: Ian Jackson <address@hidden>
> CC: Paolo Bonzini <address@hidden>
> CC: Markus Armbruster <address@hidden>
> CC: Daniel P. Berrange <address@hidden>
> CC: Michael Tokarev <address@hidden>
> CC: Alistair Francis <address@hidden>
> ---
> v7: New patch
> ---
>  os-posix.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/os-posix.c b/os-posix.c
> index d4cf466..0108028 100644
> --- a/os-posix.c
> +++ b/os-posix.c
> @@ -125,7 +125,7 @@ void os_set_proc_name(const char *s)
>      /* Could rewrite argv[0] too, but that's a bit more complicated.
>         This simple way is enough for `top'. */
>      if (prctl(PR_SET_NAME, name)) {
> -        perror("unable to change process name");
> +        error_report("unable to change process name: %s", strerror(errno));
>          exit(1);
>      }
>  #else
> @@ -247,7 +247,7 @@ static void change_root(void)
>              exit(1);
>          }
>          if (chdir("/")) {
> -            perror("not able to chdir to /");
> +            error_report("not able to chdir to /: %s", strerror(errno));
>              exit(1);
>          }
>      }
> @@ -309,7 +309,7 @@ void os_setup_post(void)
>  
>      if (daemonize) {
>          if (chdir("/")) {
> -            perror("not able to chdir to /");
> +            error_report("not able to chdir to /: %s", strerror(errno));
>              exit(1);
>          }
>          TFR(fd = qemu_open("/dev/null", O_RDWR));
> @@ -383,7 +383,7 @@ int os_mlock(void)
>  
>      ret = mlockall(MCL_CURRENT | MCL_FUTURE);
>      if (ret < 0) {
> -        perror("mlockall");
> +        error_report("mlockall: %s", strerror(errno));
>      }
>  
>      return ret;

Thinking loudly, maybe we can refactor as error_report_errno(const char
*desc)...

Anyway:
Reviewed-by: Philippe Mathieu-Daudé <address@hidden>