Re: [PATCH v2 5/9] make conf_pasta_ns() exit immediately after logging error

[Stefano Brivio <sbrivio@redhat.com>]

On Wed,  8 Feb 2023 12:48:34 -0500
Laine Stump <laine@redhat.com> wrote:

> As with conf_ports, this allows us to make the function return void.
> 
> Signed-off-by: Laine Stump <laine@redhat.com>
> ---
>  conf.c | 37 ++++++++++++-------------------------
>  1 file changed, 12 insertions(+), 25 deletions(-)
> 
> diff --git a/conf.c b/conf.c
> index 799b9ff..1e9c6f6 100644
> --- a/conf.c
> +++ b/conf.c
> @@ -500,21 +500,15 @@ static int conf_netns_opt(char *netns, const char *arg)
>   * @optind:	Index of first non-option argument
>   * @argc:	Number of arguments
>   * @argv:	Command line arguments
> - *
> - * Return: 0 on success, negative error code otherwise
>   */
> -static int conf_pasta_ns(int *netns_only, char *userns, char *netns,
> -			 int optind, int argc, char *argv[])
> +static void conf_pasta_ns(int *netns_only, char *userns, char *netns,
> +			  int optind, int argc, char *argv[])
>  {
> -	if (*netns_only && *userns) {
> -		err("Both --userns and --netns-only given");
> -		return -EINVAL;
> -	}
> +	if (*netns_only && *userns)
> +		errexit("Both --userns and --netns-only given");
>  
> -	if (*netns && optind != argc) {
> -		err("Both --netns and PID or command given");
> -		return -EINVAL;
> -	}
> +	if (*netns && optind != argc)
> +		errexit("Both --netns and PID or command given");
>  
>  	if (optind + 1 == argc) {
>  		char *endptr;
> @@ -523,23 +517,19 @@ static int conf_pasta_ns(int *netns_only, char *userns, char *netns,
>  		pidval = strtol(argv[optind], &endptr, 10);
>  		if (!*endptr) {
>  			/* Looks like a pid */
> -			if (pidval < 0 || pidval > INT_MAX) {
> -				err("Invalid PID %s", argv[optind]);
> -				return -EINVAL;
> -			}
> +			if (pidval < 0 || pidval > INT_MAX)
> +				errexit("Invalid PID %s", argv[optind]);
>  
>  			snprintf(netns, PATH_MAX, "/proc/%ld/ns/net", pidval);
>  			if (!*userns)
>  				snprintf(userns, PATH_MAX, "/proc/%ld/ns/user",
> -					 pidval);
> +				pidval);

Stray change.

>  		}
>  	}
>  
>  	/* Attaching to a netns/PID, with no userns given */
>  	if (*netns && !*userns)
>  		*netns_only = 1;
> -
> -	return 0;
>  }
>  
>  /** conf_ip4_prefix() - Parse an IPv4 prefix length or netmask
> @@ -1562,13 +1552,10 @@ void conf(struct ctx *c, int argc, char **argv)
>  		}
>  	} while (name != -1);
>  
> -	if (c->mode == MODE_PASTA) {
> -		if (conf_pasta_ns(&netns_only, userns, netns,
> -				  optind, argc, argv) < 0)
> -			usage(argv[0]);
> -	} else if (optind != argc) {
> +	if (c->mode == MODE_PASTA)
> +		conf_pasta_ns(&netns_only, userns, netns, optind, argc, argv);
> +	else if (optind != argc)
>  		usage(argv[0]);
> -	}
>  
>  	isolate_user(uid, gid, !netns_only, userns, c->mode);
>  

-- 
Stefano