1 files changed, 62 insertions, 0 deletions
diff --git a/src/execline/loopwhilex.c b/src/execline/loopwhilex.c
new file mode 100644
index 0000000..5cb6a4e
--- /dev/null
+++ b/src/execline/loopwhilex.c
@@ -0,0 +1,62 @@
+/* ISC license. */
+
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <skalibs/sgetopt.h>
+#include <skalibs/strerr2.h>
+#include <skalibs/ushort.h>
+#include <skalibs/djbunix.h>
+#include <execline/execline.h>
+
+#define USAGE "loopwhilex [ -n ] [ -x exitcode,exitcode,... ] prog..."
+#define dieusage() strerr_dieusage(100, USAGE)
+
+static int isbreak (unsigned short *tab, unsigned int n, int code)
+{
+  register unsigned int i = 0 ;
+  for (; i < n ; i++) if ((unsigned short)code == tab[i]) break ;
+  return i < n ;
+}
+
+int main (int argc, char const *const *argv, char const *const *envp)
+{
+  int wstat ;
+  int not = 0, cont = 1 ;
+  unsigned short breakcodes[256] ;
+  unsigned int nbc = 0 ;
+  PROG = "loopwhilex" ;
+  {
+    subgetopt_t l = SUBGETOPT_ZERO ;
+    for (;;)
+    {
+      register int opt = subgetopt_r(argc, argv, "nx:", &l) ;
+      if (opt == -1) break ;
+      switch (opt)
+      {
+        case 'n' : not = 1 ; break ;
+        case 'x' :
+          if (!ushort_scanlist(breakcodes, 256, l.arg, &nbc)) dieusage() ;
+          break ;
+        default : dieusage() ;
+      }
+    }
+    argc -= l.ind ; argv += l.ind ;
+  }
+  if (!argc) dieusage() ;
+
+  if (!nbc)
+  {
+    breakcodes[0] = 0 ;
+    nbc = 1 ;
+    not = !not ;
+  }
+
+  while (cont)
+  {
+    pid_t pid = el_spawn0(argv[0], argv, envp) ;
+    if (!pid) strerr_diefu2sys(111, "spawn ", argv[0]) ;
+    if (wait_pid(pid, &wstat) < 0) strerr_diefu1sys(111, "wait_pid") ;
+    cont = not == isbreak(breakcodes, nbc, wait_status(wstat)) ;
+  }
+  return WIFSIGNALED(wstat) ? WTERMSIG(wstat) : 0 ;
+}