1 files changed, 52 insertions, 0 deletions
diff --git a/src/instance/s6-instance-list.c b/src/instance/s6-instance-list.c
new file mode 100644
index 0000000..20fff9e
--- /dev/null
+++ b/src/instance/s6-instance-list.c
@@ -0,0 +1,52 @@
+/* ISC license. */
+
+#include <errno.h>
+#include <string.h>
+
+#include <skalibs/buffer.h>
+#include <skalibs/strerr.h>
+#include <skalibs/sgetopt.h>
+#include <skalibs/direntry.h>
+
+#include <s6/supervise.h>
+
+#define USAGE "s6-instance-list service"
+#define dieusage() strerr_dieusage(100, USAGE)
+
+int main (int argc, char const *const *argv)
+{
+  DIR *dir ;
+  PROG = "s6-instance-list" ;
+  {
+    subgetopt l = SUBGETOPT_ZERO ;
+    for (;;)
+    {
+      int opt = subgetopt_r(argc, argv, "", &l) ;
+      if (opt == -1) break ;
+      switch (opt)
+      {
+        default : dieusage() ;
+      }
+    }
+    argc -= l.ind ; argv += l.ind ;
+  }
+  if (!argc) dieusage() ;
+
+  s6_instance_chdirservice(argv[0]) ;
+  dir = opendir(".") ;
+  for (;;)
+  {
+    direntry *d ;
+    errno = 0 ;
+    d = readdir(dir) ;
+    if (!d) break ;
+    if (d->d_name[0] == '.') continue ;
+    if (buffer_puts(buffer_1, d->d_name) < 0
+     || buffer_put(buffer_1, "\n", 1) < 0)
+      strerr_diefu1sys(111, "write to stdout") ;
+  }
+  if (errno) strerr_diefu3sys(111, "readdir ", argv[0], "/instance") ;
+  dir_close(dir) ;
+  if (!buffer_flush(buffer_1)) strerr_diefu1sys(111, "write to stdout") ;
+  return 0 ;
+}