On 2/26/25 08:27, Daeho Jeong wrote:
> From: Daeho Jeong <daehoje...@google.com>
>
> add ftruncate command to do file truncate.
Need to update manual of f2fs_io as well?
Thanks,
>
> Signed-off-by: Daeho Jeong <daehoje...@google.com>
> ---
> tools/f2fs_io/f2fs_io.c | 26 ++++++++++++++++++++++++++
> 1 file changed, 26 insertions(+)
>
> diff --git a/tools/f2fs_io/f2fs_io.c b/tools/f2fs_io/f2fs_io.c
> index fa01f8f..08056a9 100644
> --- a/tools/f2fs_io/f2fs_io.c
> +++ b/tools/f2fs_io/f2fs_io.c
> @@ -1887,6 +1887,31 @@ static void do_get_advise(int argc, char **argv, const
> struct cmd_desc *cmd)
> printf("\n");
> }
>
> +#define ftruncate_desc "ftruncate a file"
> +#define ftruncate_help \
> +"f2fs_io ftruncate [length] [file_path]\n\n" \
> +"Do ftruncate a file in file_path with the length\n" \
> +
> +static void do_ftruncate(int argc, char **argv, const struct cmd_desc *cmd)
> +{
> + int fd, ret;
> + off_t length;
> +
> + if (argc != 3) {
> + fputs("Excess arguments\n\n", stderr);
> + fputs(cmd->cmd_help, stderr);
> + exit(1);
> + }
> +
> + length = atoll(argv[1]);
> + fd = xopen(argv[2], O_WRONLY, 0);
> +
> + ret = ftruncate(fd, length);
> + if (ret < 0)
> + die_errno("ftruncate failed");
> + exit(0);
> +}
> +
> #define CMD_HIDDEN 0x0001
> #define CMD(name) { #name, do_##name, name##_desc, name##_help, 0 }
> #define _CMD(name) { #name, do_##name, NULL, NULL, CMD_HIDDEN }
> @@ -1932,6 +1957,7 @@ const struct cmd_desc cmd_list[] = {
> CMD(removexattr),
> CMD(lseek),
> CMD(get_advise),
> + CMD(ftruncate),
> { NULL, NULL, NULL, NULL, 0 }
> };
>
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