mirror of
https://github.com/NixOS/nixpkgs.git
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65 lines
1.6 KiB
Diff
65 lines
1.6 KiB
Diff
diff --git a/src/pcm/pcm.c b/src/pcm/pcm.c
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index 74d1d1a..17ffb12 100644
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--- a/src/pcm/pcm.c
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+++ b/src/pcm/pcm.c
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@@ -2042,6 +2042,19 @@ static const char *const build_in_pcms[] = {
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NULL
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};
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+
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+// helper funcion used below
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+int file_exists(const char * filename)
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+{
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+ FILE * file;
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+ if (file = fopen(filename, "r"))
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+ {
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+ fclose(file);
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+ return 1;
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+ }
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+ return 0;
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+}
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+
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static int snd_pcm_open_conf(snd_pcm_t **pcmp, const char *name,
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snd_config_t *pcm_root, snd_config_t *pcm_conf,
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snd_pcm_stream_t stream, int mode)
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@@ -2141,8 +2154,38 @@ static int snd_pcm_open_conf(snd_pcm_t **pcmp, const char *name,
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err = -ENOMEM;
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goto _err;
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}
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- lib = buf1;
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sprintf(buf1, "%s/libasound_module_pcm_%s.so", ALSA_PLUGIN_DIR, str);
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+ if (!file_exists(buf1)){
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+ // try to locate plugin in one of ALSA_PLUGIN_DIRS which is colon separated list of paths
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+ char * pdirs = getenv("ALSA_PLUGIN_DIRS");
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+
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+ if (pdirs){ // env var set?
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+ char * saveptr;
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+ while (1) {
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+ char * dir_tok = strtok_r(pdirs, "::::", &saveptr); // "::::" to work around bug in glibc and -O2 ? ":" seems to cause a segfault
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+ if (dir_tok == NULL)
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+ break;
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+ char * so_file = malloc(strlen(str) + strlen(dir_tok) + 32);
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+ if (so_file == NULL) {
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+ err = -ENOMEM;
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+ goto _err;
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+ }
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+
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+ sprintf(so_file, "%s/libasound_module_pcm_%s.so", dir_tok, str);
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+
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+ if (file_exists(so_file)){
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+
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+ free(buf1);
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+ buf1 = so_file;
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+ break;
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+ } else {
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+ free (so_file);
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+ }
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+ pdirs = NULL;
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+ }
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+ }
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+ }
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+ lib = buf1;
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}
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}
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#ifndef PIC
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