1 files changed, 34 insertions, 0 deletions
diff --git a/src/execline/fdblock.c b/src/execline/fdblock.c
new file mode 100644
index 0000000..486591e
--- /dev/null
+++ b/src/execline/fdblock.c
@@ -0,0 +1,34 @@
+/* ISC license. */
+
+#include <skalibs/uint.h>
+#include <skalibs/sgetopt.h>
+#include <skalibs/strerr2.h>
+#include <skalibs/djbunix.h>
+
+#define USAGE "fdblock [ -n ] fd prog..."
+
+int main (int argc, char const *const *argv, char const *const *envp)
+{
+  unsigned int fd ;
+  int block = 1 ;
+  PROG = "fdblock" ;
+  {
+    subgetopt_t l = SUBGETOPT_ZERO ;
+    for (;;)
+    {
+      register int opt = subgetopt_r(argc, argv, "n", &l) ;
+      if (opt == -1) break ;
+      switch (opt)
+      {
+        case 'n' : block = 0 ; break ;
+        default : strerr_dieusage(100, USAGE) ;
+      }
+    }
+    argc -= l.ind ; argv += l.ind ;
+  }
+  if ((argc < 2) || !uint0_scan(argv[0], &fd)) strerr_dieusage(100, USAGE) ;
+  if ((block ? ndelay_off(fd) : ndelay_on(fd)) < 0)
+    strerr_diefu1sys(111, block ? "ndelay_off" : "ndelay_on") ;
+  pathexec_run(argv[1], argv+1, envp) ;
+  strerr_dieexec(111, argv[1]) ;
+}