allow to specify the signal to send

src/include/66/svc.h

@@ -56,6 +56,6 @@ extern int svc_scandir_ok (char const *dir) ;
 extern int svc_scandir_send(char const *scandir,char const *signal) ;
 extern int svc_send_wait(char const *const *list, unsigned int nservice, char **sig, unsigned int siglen, ssexec_t *info) ;
 extern void svc_unsupervise(unsigned int *alist, unsigned int alen, graph_t *g, resolve_service_t *ares, unsigned int areslen) ;
-extern void svc_send_fdholder(char const *socket) ;
+extern void svc_send_fdholder(char const *socket, char const *signal) ;
 
 #endif

src/lib66/sanitize/sanitize_fdholder.c

@@ -170,7 +170,7 @@ void sanitize_fdholder(resolve_service_t *res, uint32_t flag)
         if (!openwritenclose_unsafe(file, list.s, list.len))
             log_dieusys(LOG_EXIT_SYS, "write file: ", file) ;
 
-        svc_send_fdholder(socket) ;
+        svc_send_fdholder(socket, "twR") ;
 
         stralloc_free(&list) ;
     }

src/lib66/svc/svc_send_fdholder.c

@@ -15,14 +15,14 @@
 #include <stdlib.h>
 
 #include <oblibs/log.h>
+#include <oblibs/string.h>
 
 #include <skalibs/types.h>
 #include <skalibs/djbunix.h>
 
 #include <66/svc.h>
 
-
-void svc_send_fdholder(char const *socket)
+void svc_send_fdholder(char const *socket, char const *signal)
 {
     log_flow() ;
 
@@ -33,16 +33,18 @@ void svc_send_fdholder(char const *socket)
 
     char const *newargv[8] ;
     unsigned int m = 0 ;
+    char sig[1 + strlen(signal) + 1] ;
+    auto_strings(sig, "-", signal) ;
 
     newargv[m++] = "s6-svc" ;
-    newargv[m++] = "-twR" ;
+    newargv[m++] = sig ;
     newargv[m++] = "-T" ;
     newargv[m++] = tfmt ;
     newargv[m++] = "--" ;
     newargv[m++] = socket ;
     newargv[m++] = 0 ;
 
-    log_trace("sending -twR signal to: ", socket) ;
+    log_trace("sending -", signal, " signal to: ", socket) ;
 
     pid = child_spawn0(newargv[0], newargv, (char const *const *) environ) ;