mirror of
https://github.com/alsa-project/alsa-utils
synced 2024-12-22 18:06:30 +01:00
amixer - Add -s option
- Add -s option to read from stdin the command sequentially. - Suppress unneeded warnings in sset.
This commit is contained in:
Takashi Iwai
parent
9fe49dd30f
commit
21b94bc276
2 changed files with 172 additions and 76 deletions
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@ -2,7 +2,7 @@
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.SH NAME
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amixer \- command-line mixer for ALSA soundcard driver
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.SH SYNOPSIS
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\fBamixer\fP [\fI\-c\fP card] [\fIcmd\fP]
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\fBamixer\fP [\fI\-option\fP] [\fIcmd\fP]
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.SH DESCRIPTION
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\fBamixer\fP allows command-line control of the mixer for the ALSA
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soundcard driver.
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@ -73,16 +73,25 @@ the \fIcset\fP command.
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.SH OPTIONS
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.TP
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[\fI\-c\fP card]
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\fI\-c\fP card
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Select the card number to control. The device name created from this
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parameter has syntax 'hw:N' where N is specified card number.
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.TP
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[\fI\-D\fP device]
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\fI\-D\fP device
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Select the device name to control. The default control name is 'default'.
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.TP
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\fI\-s\fP | \fI\-\-stdin\fP
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Read from stdin and execute the command on each line sequentially.
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When this option is given, the command in command-line arguments is ignored.
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Only sset and cset are accepted. Other commands are ignored.
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The commands to unmatched ids are ignored without errors too.
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.TP
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\fI\-h\fP
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Help: show syntax.
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233
amixer/amixer.c
233
amixer/amixer.c
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@ -31,26 +31,17 @@
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#include <sys/poll.h>
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#include "amixer.h"
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#define HELPID_HELP 1000
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#define HELPID_CARD 1001
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#define HELPID_DEVICE 1002
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#define HELPID_QUIET 1003
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#define HELPID_INACTIVE 1004
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#define HELPID_DEBUG 1005
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#define HELPID_VERSION 1006
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#define HELPID_NOCHECK 1007
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#define HELPID_ABSTRACT 1008
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#define LEVEL_BASIC (1<<0)
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#define LEVEL_INACTIVE (1<<1)
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#define LEVEL_ID (1<<2)
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int quiet = 0;
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int debugflag = 0;
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int no_check = 0;
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int smixer_level = 0;
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struct snd_mixer_selem_regopt smixer_options;
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char card[64] = "default";
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static int quiet = 0;
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static int debugflag = 0;
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static int no_check = 0;
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static int smixer_level = 0;
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static int ignore_error = 0;
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static struct snd_mixer_selem_regopt smixer_options;
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static char card[64] = "default";
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static void error(const char *fmt,...)
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{
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@ -65,7 +56,7 @@ static void error(const char *fmt,...)
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static int help(void)
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{
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printf("Usage: amixer <options> command\n");
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printf("Usage: amixer <options> [command]\n");
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printf("\nAvailable options:\n");
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printf(" -h,--help this help\n");
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printf(" -c,--card N select the card\n");
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@ -76,6 +67,7 @@ static int help(void)
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printf(" -q,--quiet be quiet\n");
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printf(" -i,--inactive show also inactive controls\n");
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printf(" -a,--abstract L select abstraction level (none or basic)\n");
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printf(" -s,--stdin Read and execute commands from stdin sequentially\n");
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printf("\nAvailable commands:\n");
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printf(" scontrols show all mixer simple controls\n");
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printf(" scontents show contents of all mixer simple controls (default command)\n");
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@ -963,10 +955,10 @@ static int parse_simple_id(const char *str, snd_mixer_selem_id_t *sid)
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return 0;
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}
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static int cset(int argc, char *argv[], int roflag)
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static int cset(int argc, char *argv[], int roflag, int keep_handle)
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{
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int err;
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snd_ctl_t *handle;
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static snd_ctl_t *handle = NULL;
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snd_ctl_elem_info_t *info;
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snd_ctl_elem_id_t *id;
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snd_ctl_elem_value_t *control;
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@ -991,12 +983,15 @@ static int cset(int argc, char *argv[], int roflag)
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show_control_id(id);
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printf("\n");
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}
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if ((err = snd_ctl_open(&handle, card, 0)) < 0) {
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if (handle == NULL &&
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(err = snd_ctl_open(&handle, card, 0)) < 0) {
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error("Control %s open error: %s\n", card, snd_strerror(err));
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return err;
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}
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snd_ctl_elem_info_set_id(info, id);
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if ((err = snd_ctl_elem_info(handle, info)) < 0) {
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if (ignore_error)
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return 0;
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error("Cannot find the given element from control %s\n", card);
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return err;
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}
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@ -1060,11 +1055,16 @@ static int cset(int argc, char *argv[], int roflag)
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ptr++;
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}
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if ((err = snd_ctl_elem_write(handle, control)) < 0) {
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if (ignore_error)
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return 0;
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error("Control %s element write error: %s\n", card, snd_strerror(err));
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return err;
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}
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}
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snd_ctl_close(handle);
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if (! keep_handle) {
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snd_ctl_close(handle);
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handle = NULL;
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}
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if (!quiet) {
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snd_hctl_t *hctl;
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snd_hctl_elem_t *elem;
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@ -1163,7 +1163,7 @@ static int get_enum_item_index(snd_mixer_elem_t *elem, char **ptrp)
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return -1;
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}
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static int sset(unsigned int argc, char *argv[], int roflag)
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static int sset(unsigned int argc, char *argv[], int roflag, int keep_handle)
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{
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int err;
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unsigned int idx;
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@ -1171,7 +1171,7 @@ static int sset(unsigned int argc, char *argv[], int roflag)
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unsigned int channels = ~0U;
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unsigned int dir = 3, okflag = 3;
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long pmin, pmax, cmin, cmax;
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snd_mixer_t *handle;
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static snd_mixer_t *handle = NULL;
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snd_mixer_elem_t *elem;
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snd_mixer_selem_id_t *sid;
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snd_mixer_selem_id_alloca(&sid);
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@ -1188,30 +1188,38 @@ static int sset(unsigned int argc, char *argv[], int roflag)
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fprintf(stderr, "Specify what you want to set...\n");
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return 1;
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}
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if ((err = snd_mixer_open(&handle, 0)) < 0) {
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error("Mixer %s open error: %s\n", card, snd_strerror(err));
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return err;
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}
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if (smixer_level == 0 && (err = snd_mixer_attach(handle, card)) < 0) {
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error("Mixer attach %s error: %s", card, snd_strerror(err));
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snd_mixer_close(handle);
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return err;
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}
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if ((err = snd_mixer_selem_register(handle, smixer_level > 0 ? &smixer_options : NULL, NULL)) < 0) {
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error("Mixer register error: %s", snd_strerror(err));
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snd_mixer_close(handle);
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return err;
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}
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err = snd_mixer_load(handle);
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if (err < 0) {
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error("Mixer %s load error: %s", card, snd_strerror(err));
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snd_mixer_close(handle);
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return err;
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if (handle == NULL) {
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if ((err = snd_mixer_open(&handle, 0)) < 0) {
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error("Mixer %s open error: %s\n", card, snd_strerror(err));
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return err;
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}
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if (smixer_level == 0 && (err = snd_mixer_attach(handle, card)) < 0) {
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error("Mixer attach %s error: %s", card, snd_strerror(err));
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snd_mixer_close(handle);
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handle = NULL;
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return err;
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}
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if ((err = snd_mixer_selem_register(handle, smixer_level > 0 ? &smixer_options : NULL, NULL)) < 0) {
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error("Mixer register error: %s", snd_strerror(err));
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snd_mixer_close(handle);
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handle = NULL;
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return err;
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}
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err = snd_mixer_load(handle);
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if (err < 0) {
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error("Mixer %s load error: %s", card, snd_strerror(err));
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snd_mixer_close(handle);
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handle = NULL;
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return err;
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}
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}
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elem = snd_mixer_find_selem(handle, sid);
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if (!elem) {
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if (ignore_error)
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return 0;
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error("Unable to find simple control '%s',%i\n", snd_mixer_selem_id_get_name(sid), snd_mixer_selem_id_get_index(sid));
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snd_mixer_close(handle);
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handle = NULL;
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return -ENOENT;
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}
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if (roflag)
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@ -1319,12 +1327,17 @@ static int sset(unsigned int argc, char *argv[], int roflag)
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}
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}
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if (okflag == 0) {
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if (dir & 1)
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error("Unknown playback setup '%s'..\n", ptr);
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if (dir & 2)
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error("Unknown capture setup '%s'..\n", ptr);
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snd_mixer_close(handle);
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return err;
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if (debugflag) {
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if (dir & 1)
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error("Unknown playback setup '%s'..\n", ptr);
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if (dir & 2)
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error("Unknown capture setup '%s'..\n", ptr);
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}
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if (! keep_handle) {
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snd_mixer_close(handle);
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handle = NULL;
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}
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return 0;
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}
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if (!multi)
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ptr = optr;
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@ -1336,7 +1349,10 @@ static int sset(unsigned int argc, char *argv[], int roflag)
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printf("Simple mixer control '%s',%i\n", snd_mixer_selem_id_get_name(sid), snd_mixer_selem_id_get_index(sid));
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show_selem(handle, sid, " ", 1);
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}
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snd_mixer_close(handle);
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if (! keep_handle) {
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snd_mixer_close(handle);
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handle = NULL;
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}
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return 0;
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}
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@ -1522,20 +1538,93 @@ static int sevents(int argc ATTRIBUTE_UNUSED, char *argv[] ATTRIBUTE_UNUSED)
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return 0;
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}
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/*
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* split a line into tokens
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* the content in the line buffer is modified
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*/
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static int split_line(char *buf, char **token, int max_token)
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{
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char *dst;
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int n, esc, quote;
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for (n = 0; n < max_token; n++) {
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while (isspace(*buf))
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buf++;
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if (! *buf || *buf == '\n')
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return n;
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/* skip comments */
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if (*buf == '#' || *buf == '!')
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return n;
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esc = 0;
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quote = 0;
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token[n] = buf;
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for (dst = buf; *buf && *buf != '\n'; buf++) {
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if (esc)
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esc = 0;
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else if (isspace(*buf) && !quote) {
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buf++;
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break;
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} else if (*buf == '\\') {
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esc = 1;
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continue;
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} else if (*buf == '\'' || *buf == '"') {
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if (! quote) {
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quote = *buf;
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continue;
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} else if (*buf == quote) {
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quote = 0;
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continue;
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}
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}
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*dst++ = *buf;
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}
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*dst = 0;
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}
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return n;
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}
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#define MAX_ARGS 32
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static int exec_stdin(void)
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{
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int narg;
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char buf[256], *args[MAX_ARGS];
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int err = 0;
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/* quiet = 1; */
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ignore_error = 1;
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while (fgets(buf, sizeof(buf), stdin)) {
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narg = split_line(buf, args, MAX_ARGS);
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if (narg > 0) {
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if (!strcmp(args[0], "sset") || !strcmp(args[0], "set"))
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err = sset(narg - 1, args + 1, 0, 1);
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else if (!strcmp(args[0], "cset"))
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err = cset(narg - 1, args + 1, 0, 1);
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if (err < 0)
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return 1;
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}
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}
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return 0;
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}
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int main(int argc, char *argv[])
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{
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int morehelp, level = 0;
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struct option long_option[] =
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int read_stdin = 0;
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static struct option long_option[] =
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{
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{"help", 0, NULL, HELPID_HELP},
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{"card", 1, NULL, HELPID_CARD},
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{"device", 1, NULL, HELPID_DEVICE},
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{"quiet", 0, NULL, HELPID_QUIET},
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{"inactive", 0, NULL, HELPID_INACTIVE},
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{"debug", 0, NULL, HELPID_DEBUG},
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{"nocheck", 0, NULL, HELPID_NOCHECK},
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{"version", 0, NULL, HELPID_VERSION},
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{"abstract", 1, NULL, HELPID_ABSTRACT},
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{"help", 0, NULL, 'h'},
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{"card", 1, NULL, 'c'},
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{"device", 1, NULL, 'D'},
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{"quiet", 0, NULL, 'q'},
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{"inactive", 0, NULL, 'i'},
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{"debug", 0, NULL, 'd'},
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{"nocheck", 0, NULL, 'n'},
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{"version", 0, NULL, 'v'},
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{"abstract", 1, NULL, 'a'},
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{"stdin", 0, NULL, 's'},
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{NULL, 0, NULL, 0},
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};
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@ -1543,15 +1632,13 @@ int main(int argc, char *argv[])
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while (1) {
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int c;
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if ((c = getopt_long(argc, argv, "hc:D:qidnva:", long_option, NULL)) < 0)
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if ((c = getopt_long(argc, argv, "hc:D:qidnva:s", long_option, NULL)) < 0)
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break;
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switch (c) {
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case 'h':
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case HELPID_HELP:
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help();
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return 0;
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case 'c':
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case HELPID_CARD:
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{
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int i;
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i = snd_card_get_index(optarg);
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@ -1564,32 +1651,25 @@ int main(int argc, char *argv[])
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}
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break;
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case 'D':
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case HELPID_DEVICE:
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strncpy(card, optarg, sizeof(card)-1);
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card[sizeof(card)-1] = '\0';
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break;
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case 'q':
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case HELPID_QUIET:
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quiet = 1;
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break;
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case 'i':
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case HELPID_INACTIVE:
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level |= LEVEL_INACTIVE;
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break;
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case 'd':
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case HELPID_DEBUG:
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debugflag = 1;
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break;
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case 'n':
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case HELPID_NOCHECK:
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no_check = 1;
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break;
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case 'v':
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case HELPID_VERSION:
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printf("amixer version " SND_UTIL_VERSION_STR "\n");
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return 1;
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case 'a':
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case HELPID_ABSTRACT:
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smixer_level = 1;
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memset(&smixer_options, 0, sizeof(smixer_options));
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smixer_options.ver = 1;
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@ -1602,6 +1682,9 @@ int main(int argc, char *argv[])
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morehelp++;
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}
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break;
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case 's':
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read_stdin = 1;
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break;
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default:
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fprintf(stderr, "\07Invalid switch or option needs an argument.\n");
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morehelp++;
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@ -1612,6 +1695,10 @@ int main(int argc, char *argv[])
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return 1;
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}
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smixer_options.device = card;
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if (read_stdin)
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return exec_stdin();
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if (argc - optind <= 0) {
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return selems(LEVEL_BASIC | level) ? 1 : 0;
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}
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@ -1628,13 +1715,13 @@ int main(int argc, char *argv[])
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} else if (!strcmp(argv[optind], "scontents")) {
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return selems(LEVEL_BASIC | level) ? 1 : 0;
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} else if (!strcmp(argv[optind], "sset") || !strcmp(argv[optind], "set")) {
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return sset(argc - optind - 1, argc - optind > 1 ? argv + optind + 1 : NULL, 0) ? 1 : 0;
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return sset(argc - optind - 1, argc - optind > 1 ? argv + optind + 1 : NULL, 0, 0) ? 1 : 0;
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} else if (!strcmp(argv[optind], "sget") || !strcmp(argv[optind], "get")) {
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return sset(argc - optind - 1, argc - optind > 1 ? argv + optind + 1 : NULL, 1) ? 1 : 0;
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return sset(argc - optind - 1, argc - optind > 1 ? argv + optind + 1 : NULL, 1, 0) ? 1 : 0;
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} else if (!strcmp(argv[optind], "cset")) {
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return cset(argc - optind - 1, argc - optind > 1 ? argv + optind + 1 : NULL, 0) ? 1 : 0;
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return cset(argc - optind - 1, argc - optind > 1 ? argv + optind + 1 : NULL, 0, 0) ? 1 : 0;
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} else if (!strcmp(argv[optind], "cget")) {
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return cset(argc - optind - 1, argc - optind > 1 ? argv + optind + 1 : NULL, 1) ? 1 : 0;
|
||||
return cset(argc - optind - 1, argc - optind > 1 ? argv + optind + 1 : NULL, 1, 0) ? 1 : 0;
|
||||
} else if (!strcmp(argv[optind], "events")) {
|
||||
return events(argc - optind - 1, argc - optind > 1 ? argv + optind + 1 : NULL);
|
||||
} else if (!strcmp(argv[optind], "sevents")) {
|
||||
|
|
|
|||
Loading…
Reference in a new issue