Add waitpids, waitpids_nohang, refactor wait stuffHEADmain

 Also fix fd_cat doc

1 files changed, 20 insertions, 0 deletions

diff --git a/src/libstddjb/waitpids.c b/src/libstddjb/waitpids.c
new file mode 100644
index 0000000..47c9c34
--- /dev/null
+++ b/src/libstddjb/waitpids.c
@@ -0,0 +1,20 @@
+/* ISC license. */
+
+#include <unistd.h>
+#include <sys/wait.h>
+
+#include <skalibs/djbunix.h>
+
+ /*
+   waitpids: blocking wait, don't reap anything unlisted
+ */
+
+size_t waitpids (pid_t const *pids, size_t len, int *wstat)
+{
+  for (size_t i = 0 ; i < len ; i++)
+  {
+    pid_t r = wait_pid(pids[i], wstat) ;
+    if (r == (pid_t)-1) return i ;
+  }
+  return len ;
+}