1 files changed, 35 insertions, 0 deletions
diff --git a/src/daemontools-extras/s6-setsid.c b/src/daemontools-extras/s6-setsid.c
new file mode 100644
index 0000000..efd3832
--- /dev/null
+++ b/src/daemontools-extras/s6-setsid.c
@@ -0,0 +1,35 @@
+/* ISC license. */
+
+#include <unistd.h>
+#include <skalibs/sgetopt.h>
+#include <skalibs/strerr2.h>
+#include <skalibs/djbunix.h>
+
+#define USAGE "s6-setsid [ -i | -I ] prog..."
+
+int main (int argc, char const *const *argv, char const *const *envp)
+{
+  int insist = 0 ;
+  PROG = "s6-setsid" ;
+  for (;;)
+  {
+    register int opt = subgetopt(argc, argv, "iI") ;
+    if (opt == -1) break ;
+    switch (opt)
+    {
+      case 'i' : insist = 1 ; break ;
+      case 'I' : insist = 0 ; break ;
+      default : strerr_dieusage(100, USAGE) ;
+    }
+  }
+  argc -= subgetopt_here.ind ; argv += subgetopt_here.ind ;
+  if (!argc) strerr_dieusage(100, USAGE) ;
+
+  if (setsid() < 0)
+  {
+    if (insist) strerr_diefu1sys(111, "setsid") ;
+    else strerr_warnwu1sys("setsid") ;
+  }
+  pathexec_run(argv[0], argv, envp) ;
+  strerr_dieexec(111, argv[0]) ;
+}