[LTP] [PATCH v4 3/9] tst_supported_fs: Implement skip list

[Cyril Hrubis]

Hi!
> as it will be needed for $ALL_FILESYSTEMS shell implementation in the
> next commit. Pass tmpfs to LVM scripts (as it was required there),
> but allow to use zram01.sh with tmpfs as it works with it.
> 
> Acked-by: Richard Palethorpe <rpalethorpe@suse.com>
> Signed-off-by: Petr Vorel <pvorel@suse.cz>
> ---
> Note, I'm not sure if changes in this commit in tst_supported_fs.c will
> not be heavily rewritten due tracking minimal filesystem usage.
> 
>  testcases/lib/tst_supported_fs.c           | 56 +++++++++++++++++-----
>  testcases/misc/lvm/generate_lvm_runfile.sh |  2 +-
>  testcases/misc/lvm/prepare_lvm.sh          |  2 +-
>  3 files changed, 46 insertions(+), 14 deletions(-)
> 
> diff --git a/testcases/lib/tst_supported_fs.c b/testcases/lib/tst_supported_fs.c
> index 43eac194f..87be2b759 100644
> --- a/testcases/lib/tst_supported_fs.c
> +++ b/testcases/lib/tst_supported_fs.c
> @@ -5,42 +5,74 @@
>   */
>  
>  #include <stdio.h>
> +#include <stdlib.h>
>  #include <string.h>
>  
> +#define SKIP_DELIMITER ','
> +
>  #define TST_NO_DEFAULT_MAIN
>  #include "tst_test.h"
>  #include "tst_fs.h"
>  
>  static void usage(void)
>  {
> -	fprintf(stderr, "Usage: tst_supported_fs [fs_type]\n");
> +	fprintf(stderr, "Usage: tst_supported_fs [-s skip_list] [fs_type]\n");
>  	fprintf(stderr, "   If fs_type is supported, return 0\n");
>  	fprintf(stderr, "   If fs_type isn't supported, return 1\n");
>  	fprintf(stderr, "   If fs_type isn't specified, print the list of supported filesystems\n");
>  	fprintf(stderr, "   fs_type - a specified filesystem type\n");
> +	fprintf(stderr, "   skip_list - filesystems to skip, delimiter: '%c'\n",
> +			SKIP_DELIMITER);
>  }
>  
>  int main(int argc, char *argv[])
>  {
> -	const char *skiplist[] = {"tmpfs", NULL};
>  	const char *const *filesystems;
> -	int i;
> +	int i, ret, cnt = 1;
> +	char **skiplist = NULL;
> +	char *fs;
>  
> -	if (argc > 2) {
> -		fprintf(stderr, "Can't specify multiple fs_type\n");
> -		usage();
> -		return 2;
> +	while ((ret = getopt(argc, argv, "hs:"))) {
> +		if (ret < 0)
> +			break;
> +
> +		switch (ret) {
> +		case '?':

No usage?

> +			return 1;
> +
> +		case 'h':
> +			usage();
> +			return 0;
> +
> +		case 's':
> +			fs = optarg;
> +			for (i = 0; fs[i]; i++) {
> +				if (optarg[i] == SKIP_DELIMITER)
> +					cnt++;
> +			}
> +			skiplist = malloc(++cnt * sizeof(char *));
> +			if (!skiplist) {
> +				fprintf(stderr, "malloc() failed\n");
> +				return 1;
> +			}
> +
> +			fs = optarg;
> +			for (i = 0; i < cnt; i++)
> +				skiplist[i] = strtok_r(fs, TST_TO_STR(SKIP_DELIMITER), &fs);
> +			break;

It may be a bit cleaner to put this part into a function i.e.

	skiplist = parse_skiplist(optarg);


-- 
Cyril Hrubis
chrubis@suse.cz