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axfer: print help text of transfer subcommand just for common options

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This commit adds help text of transfer subcommand.

In this time, backend options are not described. They will be added in
future commits.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto
2018-12-07 18:41:02 +09:00
committed by Takashi Iwai
parent c75b96be49
commit 908ff69be2
1 changed files with 29 additions and 0 deletions
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axfer/xfer-options.c
+29
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@@ -25,6 +25,30 @@ enum no_short_opts {
OPT_PROCESS_ID_FILE,
};
static int print_help()
{
printf(
"Usage:\n"
" axfer transfer DIRECTION [ COMMON-OPTIONS ] [ BACKEND-OPTIONS ]\n"
"\n"
" where:\n"
" DIRECTION = capture | playback\n"
" COMMON-OPTIONS =\n"
" -h, --help help\n"
" -v, --verbose verbose\n"
" -q, --quiet quiet mode\n"
" -d, --duration=# interrupt after # seconds\n"
" -s, --samples=# interrupt after # frames\n"
" -f, --format=FORMAT sample format (case-insensitive)\n"
" -c, --channels=# channels\n"
" -r, --rate=# numeric sample rate in unit of Hz or kHz\n"
" -t, --file-type=TYPE file type (wav, au, sparc, voc or raw, case-insentive)\n"
" -I, --separate-channels one file for each channel\n"
" --dump-hw-params dump hw_params of the device\n"
" --xfer-type=BACKEND backend type (libasound, libffado)\n"
);
}
static int allocate_paths(struct xfer_context *xfer, char *const *paths,
unsigned int count)
{
@@ -347,6 +371,11 @@ int xfer_options_parse_args(struct xfer_context *xfer,
free(l_opts);
free(s_opts);
if (xfer->help) {
print_help();
return 0;
}
err = allocate_paths(xfer, argv + optind, argc - optind);
if (err < 0)
return err;