amixer no-range-checking option

This patch adds the --nocheck option that disables range checking. It helps
debugging drivers.

Signed-off-by: Giuliano Pochini <pochini@shiny.it>

diff --git a/amixer/amixer.c b/amixer/amixer.c
index 97fe5d5..e4fec88 100644 (file)
--- a/amixer/amixer.c
+++ b/amixer/amixer.c
@@ -38,6 +38,7 @@
 #define HELPID_INACTIVE                1004
 #define HELPID_DEBUG            1005
 #define HELPID_VERSION         1006
+#define HELPID_NOCHECK         1007
 
 #define LEVEL_BASIC            (1<<0)
 #define LEVEL_INACTIVE         (1<<1)
@@ -45,6 +46,7 @@
 
 int quiet = 0;
 int debugflag = 0;
+int no_check = 0;
 char card[64] = "default";
 
 static void error(const char *fmt,...)
@@ -66,6 +68,7 @@ static int help(void)
        printf("  -c,--card N     select the card\n");
        printf("  -D,--device N   select the device, default '%s'\n", card);
        printf("  -d,--debug      debug mode\n");
+       printf("  -n,--nocheck    do not perform range checking\n");
        printf("  -v,--version    print version of this program\n");
        printf("  -q,--quiet      be quiet\n");
        printf("  -i,--inactive   show also inactive controls\n");
@@ -161,6 +164,8 @@ static const char *control_access(snd_ctl_elem_info_t *info)
 
 static int check_range(int val, int min, int max)
 {
+       if (no_check)
+               return val;
        if (val < min)
                return min;
        if (val > max)
@@ -1456,6 +1461,7 @@ int main(int argc, char *argv[])
                {"quiet", 0, NULL, HELPID_QUIET},
                {"inactive", 0, NULL, HELPID_INACTIVE},
                {"debug", 0, NULL, HELPID_DEBUG},
+               {"nocheck", 0, NULL, HELPID_NOCHECK},
                {"version", 0, NULL, HELPID_VERSION},
                {NULL, 0, NULL, 0},
        };
@@ -1464,7 +1470,7 @@ int main(int argc, char *argv[])
        while (1) {
                int c;
 
-               if ((c = getopt_long(argc, argv, "hc:D:qidv", long_option, NULL)) < 0)
+               if ((c = getopt_long(argc, argv, "hc:D:qidnv", long_option, NULL)) < 0)
                        break;
                switch (c) {
                case 'h':
@@ -1501,6 +1507,10 @@ int main(int argc, char *argv[])
                case HELPID_DEBUG:
                        debugflag = 1;
                        break;
+               case 'n':
+               case HELPID_NOCHECK:
+                       no_check = 1;
+                       break;
                case 'v':
                case HELPID_VERSION:
                        printf("amixer version " SND_UTIL_VERSION_STR "\n");