3 files changed, 23 insertions, 5 deletions
diff --git a/src/instance/s6-instance-control.c b/src/instance/s6-instance-control.c
index badb8b2..ef064e6 100644
--- a/src/instance/s6-instance-control.c
+++ b/src/instance/s6-instance-control.c
@@ -10,7 +10,7 @@
 
 #include <s6/config.h>
 
-#define USAGE "s6-instance-control [ -wu | -wU | -wd | -wD | -wr | -wR ] [ -T timeout ] [ -abqhkti12pcyroduDUxOX ] service instance"
+#define USAGE "s6-instance-control [ -wu | -wU | -wd | -wD | -wr | -wR ] [ -T timeout ] [ -abqhkti12pcyroduDUxO ] service instance"
 #define dieusage() strerr_dieusage(100, USAGE)
 
 #define DATASIZE 63
@@ -27,7 +27,7 @@ int main (int argc, char const **argv)
     unsigned int timeout = 0 ;
     for (;;)
     {
-      int opt = subgetopt_r(argc, argv, "abqhkti12pcyroduxOT:w:", &l) ;
+      int opt = subgetopt_r(argc, argv, "abqhkti12pcyroduDUxOT:w:", &l) ;
       if (opt == -1) break ;
       switch (opt)
       {
diff --git a/src/instance/s6-instance-create.c b/src/instance/s6-instance-create.c
index 40b8a83..5e3d172 100644
--- a/src/instance/s6-instance-create.c
+++ b/src/instance/s6-instance-create.c
@@ -4,6 +4,7 @@
 #include <stdint.h>
 #include <string.h>
 #include <unistd.h>
+#include <sys/stat.h>
 
 #include <skalibs/bytestr.h>
 #include <skalibs/types.h>
@@ -80,14 +81,25 @@ int main (int argc, char const *const *argv)
 
   {
     char sv[namelen + 14] ;
+    char const *p = sv ;
     memcpy(sv, "../instances/", 13) ;
     memcpy(sv + 13, argv[1], namelen + 1) ;
+    {
+      struct stat st ;
+      if (stat(sv, &st) == 0)
+        if (!S_ISDIR(st.st_mode))
+          strerr_dief3x(100, "unexpected file preventing instance creation at ", argv[0], sv+2) ;
+        else
+          strerr_dief3x(100, "instance appears to already exist at ", argv[0], sv+2) ;
+      else if (errno != ENOENT)
+        strerr_diefu3sys(111, "stat ", argv[0], sv+2) ;
+    }
     if (!hiercopy("../instances/.template", sv))
     {
       cleanup(sv) ;
       strerr_diefu5sys(111, "copy ", argv[0], "/instances/.template to ", argv[0], sv+2) ;
     }
-    if (s6_supervise_link_names_g(".", (char const *const *)&sv, argv + 1, 1, options, &tto) == -1)
+    if (s6_supervise_link_names_g(".", &p, argv + 1, 1, options, &tto) == -1)
     {
       cleanup(sv) ;
       strerr_diefu4sys(errno == ETIMEDOUT ? 99 : 111, "create instance of ", argv[0], " named ", argv[1]) ;
diff --git a/src/instance/s6-instance-delete.c b/src/instance/s6-instance-delete.c
index 37c345c..92078e0 100644
--- a/src/instance/s6-instance-delete.c
+++ b/src/instance/s6-instance-delete.c
@@ -21,6 +21,7 @@
 int main (int argc, char const *const *argv)
 {
   tain tto = TAIN_INFINITE_RELATIVE ;
+  size_t namelen ;
   uint32_t options = 1 ;
   PROG = "s6-instance-delete" ;
   {
@@ -42,7 +43,9 @@ int main (int argc, char const *const *argv)
   }
   if (argc < 2) dieusage() ;
   if (!argv[0][0]) strerr_dief1x(100, "invalid service path") ;
-  if (!argv[1][0] || argv[1][0] == '.' || byte_in(argv[1], strlen(argv[1]), " \t\f\r\n", 5) < strlen(argv[1]))
+
+  namelen = strlen(argv[1]) ;
+  if (!argv[1][0] || argv[1][0] == '.' || byte_in(argv[1], namelen, " \t\f\r\n", 5) < namelen)
     strerr_dief1x(100, "invalid instance name") ;
 
   tain_now_set_stopwatch_g() ;
@@ -50,11 +53,14 @@ int main (int argc, char const *const *argv)
 
   {
     size_t svlen = strlen(argv[0]) ;
-    char sc[svlen + 10] ;
+    char sc[svlen + 12 + namelen] ;
     memcpy(sc, argv[0], svlen) ;
     memcpy(sc + svlen, "/instance", 10) ;
     if (s6_supervise_unlink_names_g(sc, argv + 1, 1, options, &tto) == -1)
       strerr_diefu4sys(111, "prepare deletion of instance ", argv[1], " of service ", argv[0]) ;
+    memcpy(sc + svlen + 9, "s/", 2) ;
+    memcpy(sc + svlen + 11, argv[1], namelen + 1) ;
+    rm_rf(sc) ;
   }
 
   return 0 ;