1 files changed, 61 insertions, 0 deletions
diff --git a/src/skaembutils/s6-format-filter.c b/src/skaembutils/s6-format-filter.c
new file mode 100644
index 0000000..78e4437
--- /dev/null
+++ b/src/skaembutils/s6-format-filter.c
@@ -0,0 +1,61 @@
+/* ISC license. */
+
+#include <errno.h>
+#include <skalibs/strerr2.h>
+#include <skalibs/buffer.h>
+#include <skalibs/stralloc.h>
+#include <skalibs/skamisc.h>
+
+#define USAGE "s6-format-filter format [ args... ]"
+
+int main (int argc, char const *const *argv)
+{
+  stralloc src = STRALLOC_ZERO ;
+  stralloc dst = STRALLOC_ZERO ;
+  char vars[12] = "s0123456789" ;
+  char const *args[12] = { "" } ;
+  char const *format ;
+  PROG = "s6-format-filter" ;
+  argc-- ; args[1] = *argv++ ;
+  if (!argc--) strerr_dieusage(100, USAGE) ;
+  format = *argv++ ;
+  if (argc > 9) argc = 9 ;
+  vars[argc+2] = 0 ;
+  {
+    register unsigned int i = 0 ;
+    for (; i < (unsigned int)argc ; i++) args[2+i] = argv[i] ;
+  }
+  if (!string_format(&dst, vars, format, args))
+    strerr_diefu1sys(111, "compile format") ;
+
+  for (;;)
+  {
+    register int r ;
+    src.len = 0 ;
+    dst.len = 0 ;
+    r = skagetln(buffer_0f1, &src, '\n') ;
+    if (!r) break ;
+    else if (r < 0)
+    {
+      if ((errno != EPIPE) || !stralloc_0(&src))
+        strerr_diefu1sys(111, "read from stdin") ;
+    }
+    else src.s[src.len-1] = 0 ;
+    args[0] = src.s ;    
+    if (!string_format(&dst, vars, format, args))
+    {
+      int e = errno ;
+      buffer_flush(buffer_1) ;
+      errno = e ;
+      strerr_diefu1sys(111, "format") ;
+    }
+    if (r > 0)
+    {
+      if (!stralloc_catb(&dst, "\n", 1))
+        strerr_diefu1sys(111, "format") ;
+    }
+    if (buffer_put(buffer_1, dst.s, dst.len) < 0)
+      strerr_diefu1sys(111, "write to stdout") ;
+  }
+  return 0 ;
+}