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

[Markus Armbruster <armbru@xxxxxxxxxx>]

Philippe Mathieu-Daudé <f4bug@xxxxxxxxx> writes:

> 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 <Ian.Jackson@xxxxxxxxxxxxx>
>> CC: Paolo Bonzini <pbonzini@xxxxxxxxxx>
>> CC: Markus Armbruster <armbru@xxxxxxxxxx>
>> CC: Daniel P. Berrange <berrange@xxxxxxxxxx>
>> CC: Michael Tokarev <mjt@xxxxxxxxxx>
>> CC: Alistair Francis <alistair.francis@xxxxxxxxxx>
>> ---
>> 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)...

Maybe.  If you want to try, make it a separate series not blocking this
one.

> Anyway:
> Reviewed-by: Philippe Mathieu-Daudé <f4bug@xxxxxxxxx>

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