linux-ext4 - Re: [PATCH] lsattr: return error values

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Date:	Thu, 18 Jun 2009 17:35:04 -0500
From:	Eric Sandeen <sandeen@...hat.com>
To:	ext4 development <linux-ext4@...r.kernel.org>
Subject: Re: [PATCH] lsattr: return error values

Eric Sandeen wrote:
> RH bug 489841 points out that lsattr doesn't return an error
> if you point it at a file that doesn't exist.
> 
> This is slightly trickier because it can take more than one
> file as an arg, but ls seems to report an error if any occurred,
> so this does the same, it'll report the last error that was 
> encountered.

oops kernel on the brain, I shouldn't be exiting with the errno should
I, sigh.

I'll resend :)

-Eric

> Signed-off-by: Eric Sandeen <sandeen@...hat.com>
> ---
> 
> 
> diff --git a/misc/lsattr.c b/misc/lsattr.c
> index 254ebb4..39fe564 100644
> --- a/misc/lsattr.c
> +++ b/misc/lsattr.c
> @@ -74,22 +74,25 @@ static void usage(void)
>  	exit(1);
>  }
>  
> -static void list_attributes (const char * name)
> +static int list_attributes (const char * name)
>  {
>  	unsigned long flags;
>  	unsigned long generation;
> +	int retval = 0;
>  
>  	if (fgetflags (name, &flags) == -1) {
> -		com_err (program_name, errno, _("While reading flags on %s"),
> +		retval = errno;
> +		com_err (program_name, retval, _("While reading flags on %s"),
>  			 name);
> -		return;
> +		return retval;
>  	}
>  	if (generation_opt) {
>  		if (fgetversion (name, &generation) == -1) {
> -			com_err (program_name, errno,
> +			retval = errno;
> +			com_err (program_name, retval,
>  				 _("While reading version on %s"),
>  				 name);
> -			return;
> +			return retval;
>  		}
>  		printf ("%5lu ", generation);
>  	}
> @@ -101,23 +104,27 @@ static void list_attributes (const char * name)
>  		print_flags(stdout, flags, pf_options);
>  		printf(" %s\n", name);
>  	}
> +	return retval;
>  }
>  
>  static int lsattr_dir_proc (const char *, struct dirent *, void *);
>  
> -static void lsattr_args (const char * name)
> +static int lsattr_args (const char * name)
>  {
>  	STRUCT_STAT	st;
> +	int		retval = 0;
>  
> -	if (LSTAT (name, &st) == -1)
> -		com_err (program_name, errno, _("while trying to stat %s"),
> +	if (LSTAT (name, &st) == -1) {
> +		retval= errno;
> +		com_err (program_name, retval, _("while trying to stat %s"),
>  			 name);
> -	else {
> +	} else {
>  		if (S_ISDIR(st.st_mode) && !dirs_opt)
> -			iterate_on_dir (name, lsattr_dir_proc, NULL);
> +			retval = iterate_on_dir (name, lsattr_dir_proc, NULL);
>  		else
> -			list_attributes (name);
> +			retval = list_attributes (name);
>  	}
> +	return retval;
>  }
>  
>  static int lsattr_dir_proc (const char * dir_name, struct dirent * de,
> @@ -155,6 +162,7 @@ int main (int argc, char ** argv)
>  {
>  	int c;
>  	int i;
> +	int err, retval = 0;
>  
>  #ifdef ENABLE_NLS
>  	setlocale(LC_MESSAGES, "");
> @@ -193,9 +201,12 @@ int main (int argc, char ** argv)
>  		fprintf (stderr, "lsattr %s (%s)\n",
>  			 E2FSPROGS_VERSION, E2FSPROGS_DATE);
>  	if (optind > argc - 1)
> -		lsattr_args (".");
> +		retval = lsattr_args (".");
>  	else
> -		for (i = optind; i < argc; i++)
> -			lsattr_args (argv[i]);
> -	exit(0);
> +		for (i = optind; i < argc; i++) {
> +			err = lsattr_args (argv[i]);
> +			if (err)
> +				retval = err;
> +		}
> +	exit(retval);
>  }
> 
> --
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