3 files changed, 28 insertions, 0 deletions
diff --git a/src/libstddjb/wait_pid_nohang.c b/src/libstddjb/wait_pid_nohang.c
index 7b27bbe..f22a222 100644
--- a/src/libstddjb/wait_pid_nohang.c
+++ b/src/libstddjb/wait_pid_nohang.c
@@ -3,6 +3,11 @@
 #include <sys/wait.h>
 #include <skalibs/djbunix.h>
 
+ /*
+   wait_pid_nohang (defined here): reaps everything until it gets pid
+   waitpid_nohang (macro): only tries to reap pid, doesn't touch others
+ */
+
 pid_t wait_pid_nohang (pid_t pid, int *wstat)
 {
   int w = 0 ;
diff --git a/src/libstddjb/wait_pids_nohang.c b/src/libstddjb/wait_pids_nohang.c
index c13ddec..f56c065 100644
--- a/src/libstddjb/wait_pids_nohang.c
+++ b/src/libstddjb/wait_pids_nohang.c
@@ -3,6 +3,10 @@
 #include <sys/wait.h>
 #include <skalibs/djbunix.h>
 
+ /*
+   wait_pids_nohang (with the underscore): reap everything, report if in pids
+ */
+
 int wait_pids_nohang (pid_t const *pids, unsigned int len, int *wstat)
 {
   for (;;)
diff --git a/src/libstddjb/waitpids_nohang.c b/src/libstddjb/waitpids_nohang.c
new file mode 100644
index 0000000..23f03de
--- /dev/null
+++ b/src/libstddjb/waitpids_nohang.c
@@ -0,0 +1,19 @@
+/* ISC license. */
+
+#include <sys/wait.h>
+#include <skalibs/djbunix.h>
+
+ /*
+   waitpids_nohang (defined here): only reap pids, don't touch the rest
+ */
+
+int waitpids_nohang (pid_t const *pids, unsigned int len, int *wstat)
+{
+  for (unsigned int i = 0 ; i < len ; i++)
+  {
+    pid_t r = waitpid_nohang(pids[i], wstat) ;
+    if (r == -1) return -1-i ;
+    else if (r == pids[i]) return 1+i ;
+  }
+  return 0 ;
+}