2 files changed, 36 insertions, 2 deletions
diff --git a/src/libstddjb/cspawn.c b/src/libstddjb/cspawn.c
index 8e2298e..cb89481 100644
--- a/src/libstddjb/cspawn.c
+++ b/src/libstddjb/cspawn.c
@@ -165,6 +165,10 @@ static inline pid_t cspawn_pspawn (char const *prog, char const *const *argv, ch
     }
 #ifdef SKALIBS_HASPOSIXSPAWNSETSID
     if (flags & CSPAWN_FLAGS_SETSID) pfff |= POSIX_SPAWN_SETSID ;
+#else
+#ifdef SKALIBS_HASPOSIXSPAWNSETSIDNP
+    if (flags & CSPAWN_FLAGS_SETSID) pfff |= POSIX_SPAWN_SETSID_NP ;
+#endif
 #endif
     e = posix_spawnattr_setflags(&attr, pfff) ;
     if (e) goto errattr ;
@@ -253,7 +257,7 @@ static inline pid_t cspawn_pspawn (char const *prog, char const *const *argv, ch
   return 0 ;
 }
 
-#if defined(SKALIBS_HASPOSIXSPAWNSETSID) && (defined(SKALIBS_HASPOSIXSPAWNCHDIR) || defined(SKALIBS_HASPOSIXSPAWNCHDIRNP))
+#if (defined(SKALIBS_HASPOSIXSPAWNSETSID) || defined(SKALIBS_HASPOSIXSPAWNSETSIDNP)) && (defined(SKALIBS_HASPOSIXSPAWNCHDIR) || defined(SKALIBS_HASPOSIXSPAWNCHDIRNP))
 
 pid_t cspawn (char const *prog, char const *const *argv, char const *const *envp, uint16_t flags, cspawn_fileaction const *fa, size_t n)
 {
@@ -264,7 +268,7 @@ pid_t cspawn (char const *prog, char const *const *argv, char const *const *envp
 
 pid_t cspawn (char const *prog, char const *const *argv, char const *const *envp, uint16_t flags, cspawn_fileaction const *fa, size_t n)
 {
-#if !defined(SKALIBS_HASPOSIXSPAWNSETSID)
+#if !defined(SKALIBS_HASPOSIXSPAWNSETSID) && !defined(SKALIBS_HASPOSIXSPAWNSETSIDNP)
   if (flags & CSPAWN_FLAGS_SETSID) goto dofork ;
 #endif
 #if !defined(SKALIBS_HASPOSIXSPAWNCHDIR) && !defined(SKALIBS_HASPOSIXSPAWNCHDIRNP)
diff --git a/src/sysdeps/tryposixspawnsetsidnp.c b/src/sysdeps/tryposixspawnsetsidnp.c
new file mode 100644
index 0000000..fd7659d
--- /dev/null
+++ b/src/sysdeps/tryposixspawnsetsidnp.c
@@ -0,0 +1,30 @@
+/* ISC license. */
+
+#undef _POSIX_C_SOURCE
+#undef _XOPEN_SOURCE
+
+#ifndef _XPG4_2
+#define _XPG4_2
+#endif
+
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+
+#ifndef _DEFAULT_SOURCE
+#define _DEFAULT_SOURCE
+#endif
+
+#include <spawn.h>
+
+int main (void)
+{
+  pid_t pid ;
+  posix_spawn_file_actions_t actions ;
+  posix_spawnattr_t attr ;
+  char *const argv[2] = { "/bin/true", 0 } ;
+  char *const envp[1] = { 0 } ;
+  posix_spawnattr_setflags(&attr, POSIX_SPAWN_SETSID_NP) ;
+  posix_spawn_file_actions_init(&actions) ;
+  return posix_spawn(&pid, argv[0], 0, 0, argv, envp) ;
+}