fix alsapid build on non-linux systems. #181

alsapid/alsapid.h

@@ -33,4 +33,6 @@ void alsapid_compose_src_link(int alsa_client_id, char * buffer);
 void alsapid_compose_dst_link(char * buffer);
 bool alsapid_get_pid(int alsa_client_id, pid_t * pid_ptr);
 
+#define MAX_ALSAPID_PATH 255
+
 #endif /* #ifndef ALSAPID_H__0A27F284_7538_4791_8023_0FBED929EAF3__INCLUDED */

alsapid/helper.c

@@ -32,7 +32,6 @@
 #include <stdlib.h>             /* atoll */
 #include <unistd.h>
 #include <sys/types.h>
-#include <linux/limits.h>
 
 void alsapid_compose_src_link(int alsa_client_id, char * buffer)
 {
@@ -46,14 +45,14 @@ void alsapid_compose_dst_link(char * buffer)
 
 bool alsapid_get_pid(int alsa_client_id, pid_t * pid_ptr)
 {
-  char src[PATH_MAX];
-  char dst[PATH_MAX + 1];
+  char src[MAX_ALSAPID_PATH];
+  char dst[MAX_ALSAPID_PATH + 1];
   ssize_t ret;
   pid_t pid;
 
   alsapid_compose_src_link(alsa_client_id, src);
 
-  ret = readlink(src, dst, PATH_MAX);
+  ret = readlink(src, dst, MAX_ALSAPID_PATH);
   if (ret == -1)
   {
     return false;

alsapid/lib.c

@@ -28,7 +28,6 @@
 
 #include <alsa/asoundlib.h>
 #include <dlfcn.h>
-#include <linux/limits.h>
 #include <stdio.h>
 
 #define API_VERSION "ALSA_0.9"
@@ -38,8 +37,8 @@
 
 static void create_symlink(int alsa_client_id)
 {
-  char src[PATH_MAX];
-  char dst[PATH_MAX];
+  char src[MAX_ALSAPID_PATH];
+  char dst[MAX_ALSAPID_PATH];
 
   alsapid_compose_src_link(alsa_client_id, src);
   alsapid_compose_dst_link(dst);
@@ -57,7 +56,7 @@ static void create_symlink(int alsa_client_id)
 
 static void destroy_symlink(int alsa_client_id)
 {
-  char src[PATH_MAX];
+  char src[MAX_ALSAPID_PATH];
 
   alsapid_compose_src_link(alsa_client_id, src);