alsactl: Add -g,--ignore option to ignore 'No soundcards found' error

Signed-off-by: Jaroslav Kysela <perex@perex.cz>

4 files changed, 26 insertions, 6 deletions

diff --git a/alsactl/alsactl.1 b/alsactl/alsactl.1
index d7f30f6..b038a82 100644
--- a/alsactl/alsactl.1
+++ b/alsactl/alsactl.1
@@ -51,6 +51,11 @@ Used with restore command.  Try to restore the matching control elements
 as much as possible.  This option is set as default now.
 
 .TP
+\fI\-g, \-\-ignore\fP
+Used with store and restore commands. Do not show 'No soundcards found'
+and do not set an error exit code when soundcards are not installed.
+
+.TP
 \fI\-P, \-\-pedantic\fP
 Used with restore command.  Don't restore mismatching control elements.
 This option was the old default behavior.
diff --git a/alsactl/alsactl.c b/alsactl/alsactl.c
index 57957bf..f846316 100644
--- a/alsactl/alsactl.c
+++ b/alsactl/alsactl.c
@@ -34,6 +34,7 @@
 
 int debugflag = 0;
 int force_restore = 1;
+int ignore_nocards = 0;
 char *command;
 char *statefile = NULL;
 
@@ -48,7 +49,8 @@ static void help(void)
 	printf("  -f,--file #      configuration file (default " SYS_ASOUNDRC ")\n");
 	printf("  -F,--force       try to restore the matching controls as much as possible\n");
 	printf("                   (default mode)\n");
-	printf("  -P,--pedantic    don't restore mismatching controls (old default)\n");
+	printf("  -g,--ignore      ignore 'No soundcards found' error\n");
+	printf("  -P,--pedantic    do not restore mismatching controls (old default)\n");
 	printf("  -r,--runstate #  save restore and init state to this file (only errors)\n");
 	printf("                   default settings is 'no file set'\n");
 	printf("  -R,--remove      remove runstate file at first, otherwise append errors\n");
@@ -75,6 +77,7 @@ int main(int argc, char *argv[])
 		{"env", 1, NULL, 'E'},
 		{"initfile", 1, NULL, 'i'},
 		{"force", 0, NULL, 'F'},
+		{"ignore", 0, NULL, 'g'},
 		{"pedantic", 0, NULL, 'P'},
 		{"runstate", 0, NULL, 'r'},
 		{"remove", 0, NULL, 'R'},
@@ -99,7 +102,7 @@ int main(int argc, char *argv[])
 	while (1) {
 		int c;
 
-		if ((c = getopt_long(argc, argv, "hdvf:FE:i:Pr:R", long_option, NULL)) < 0)
+		if ((c = getopt_long(argc, argv, "hdvf:FgE:i:Pr:R", long_option, NULL)) < 0)
 			break;
 		switch (c) {
 		case 'h':
@@ -111,6 +114,9 @@ int main(int argc, char *argv[])
 		case 'F':
 			force_restore = 1;
 			break;
+		case 'g':
+			ignore_nocards = 1;
+			break;
 		case 'E':
 			if (putenv(optarg)) {
 				fprintf(stderr, "environment string '%s' is wrong\n", optarg);
diff --git a/alsactl/alsactl.h b/alsactl/alsactl.h
index 408b145..44d27f1 100644
--- a/alsactl/alsactl.h
+++ b/alsactl/alsactl.h
@@ -1,5 +1,6 @@
 extern int debugflag;
 extern int force_restore;
+extern int ignore_nocards;
 extern char *command;
 extern char *statefile;
 
diff --git a/alsactl/state.c b/alsactl/state.c
index 554020b..576721a 100644
--- a/alsactl/state.c
+++ b/alsactl/state.c
@@ -1507,8 +1507,12 @@ int save_state(const char *file, const char *cardname)
 				break;
 			if (card < 0) {
 				if (first) {
-					error("No soundcards found...");
-					return -ENODEV;
+					if (ignore_nocards) {
+						return 0;
+					} else {
+						error("No soundcards found...");
+						return -ENODEV;
+					}
 				}
 				break;
 			}
@@ -1606,8 +1610,12 @@ int load_state(const char *file, const char *initfile, const char *cardname)
 				break;
 			if (card < 0) {
 				if (first) {
-					error("No soundcards found...");
-					return -ENODEV;
+					if (ignore_nocards) {
+						return 0;
+					} else {
+						error("No soundcards found...");
+						return -ENODEV;
+					}
 				}
 				break;
 			}