added --max-children to options parser

3 files changed, 16 insertions, 0 deletions

diff --git a/doc/rhdropbox.8.txt b/doc/rhdropbox.8.txt
index 843ab2a..da95a82 100644
--- a/doc/rhdropbox.8.txt
+++ b/doc/rhdropbox.8.txt
@@ -88,6 +88,9 @@ The following options can be passed to the *rhdropbox* daemon:
                   consider a file to be complete when it size doesn't change 3-5seconds
                   after the event got received.
 
+*-m|--max-children <#of children>*::
+   Limits the total concurrent executions of *-x|--script*. A value of 0 means no limit.
+
 
 COMMAND INTERFACE
 -----------------
diff --git a/options.c b/options.c
index 93e01ad..d567891 100644
--- a/options.c
+++ b/options.c
@@ -174,6 +174,7 @@ int options_parse(options_t* opt, int argc, char* argv[])
     PARSE_STRING_LIST("-L","--log", opt->log_targets_)
     PARSE_STRING_PARAM("-s","--command-sock", opt->command_sock_)
     PARSE_STRING_PARAM("-x","--script", opt->script_)
+    PARSE_INT_PARAM("-m","--max-children", opt->max_children_)
     else 
       return i;
   }
@@ -186,6 +187,14 @@ int options_parse_post(options_t* opt)
   if(!opt)
     return -1;
 
+  if(opt->max_children_ < 0) {
+    log_printf(ERROR, "-m|--max-children invalid value %d", opt->max_children_);
+    return 1;
+  }
+
+  if(opt->max_children_ == 0)
+    log_printf(WARNING, "disabling child limit, this may be harmful to your system");
+
   return 0;
 }
 
@@ -205,6 +214,7 @@ void options_default(options_t* opt)
 
   opt->command_sock_ = strdup("/var/run/rhdropbox/cmd.sock");
   opt->script_ = strdup("newfile.sh");
+  opt->max_children_ = 8;
 }
 
 void options_clear(options_t* opt)
@@ -244,6 +254,7 @@ void options_print_usage()
   printf("                                      add a log target, can be invoked several times\n");
   printf("  [-s|--command-sock] <unix sock>     the command socket e.g. /var/run/rhdropbox/cmd.sock\n");
   printf("  [-x|--script] <script>              the command socket e.g. newfile.sh\n");
+  printf("  [-m|--max-children] <#of children>  limit of children to be started e.g. 8\n");
 }
 
 void options_print(options_t* opt)
@@ -262,4 +273,5 @@ void options_print(options_t* opt)
 
   printf("command_sock: '%s'\n", opt->command_sock_);
   printf("script: '%s'\n", opt->script_);
+  printf("max_children: %d\n", opt->max_children_);
 }
diff --git a/options.h b/options.h
index aae2bd7..b29fa96 100644
--- a/options.h
+++ b/options.h
@@ -35,6 +35,7 @@ struct options_struct {
 
   char* command_sock_;
   char* script_;
+  int max_children_;
 };
 typedef struct options_struct options_t;