diff --git a/inotify/exec_on_modify.c b/inotify/exec_on_modify.c
index e3a1968..3d5b75c 100644
--- a/inotify/exec_on_modify.c
+++ b/inotify/exec_on_modify.c
@@ -172,15 +172,15 @@
 }
 
 char cmd[255] = {};
-char prefix[63] = {};
+char suffix[63] = {};
 
-/** return true when target ends with find_prefix */
-int ends_with(char* target, char* find_prefix){
+/** return true when target ends with find_suffix */
+int ends_with(char* target, char* find_suffix){
    char *p = target;
-   char *q = find_prefix;
+   char *q = find_suffix;
    while( *p ) p++;
    while( *q ) q++;
-   while( find_prefix <= q){
+   while( find_suffix <= q){
       if (*p-- != *q--) return 0;
    }
    return 1;
@@ -189,7 +189,7 @@
 {
    pid_t pid;
 //   printf("target: %s\n", target);
-   if (strlen(prefix) == 0 || ends_with(target, prefix)){
+   if (strlen(suffix) == 0 || ends_with(target, suffix)){
       if ((pid = fork()) == 0){
          char *argv[] = { cmd, NULL };
          execvp( cmd, argv );
@@ -207,8 +207,8 @@
    fd_set readfds;
 
    if (argc < 2){
-      printf("Usage: exec_on_modify command [prefix]\n");
-      printf("  command is executed when a file ends with [prefix] modified.\n");
+      printf("Usage: exec_on_modify command [suffix]\n");
+      printf("  command is executed when a file ends with [suffix] modified.\n");
       printf("  example1:  exec_on_modify make .c \n");
       printf("  example2:  exec_on_modify platex .tex \n");
       exit(0);
@@ -218,10 +218,10 @@
       strcpy(cmd, argv[1]);
    }
    if (argc == 3){
-      strcpy(prefix, argv[2]);
+      strcpy(suffix, argv[2]);
    }
-   printf("%s\n", cmd);
-   printf("%s\n", prefix);
+   printf("command is %s.\n", cmd);
+   printf("target file suffix is %s\n", suffix);
 
    fd = inotify_init();
 
@@ -286,7 +286,6 @@
                }
 
                if(event->mask & IN_IGNORED){
-                  // printf("[%s] was ignored.\n", target);
                   //監視対象削除
                   deleteWdInfo(event->wd);
                }