1 files changed, 51 insertions, 0 deletions
diff --git a/src/skaembutils/s6-printenv.c b/src/skaembutils/s6-printenv.c
new file mode 100644
index 0000000..3f4571b
--- /dev/null
+++ b/src/skaembutils/s6-printenv.c
@@ -0,0 +1,51 @@
+/* ISC license. */
+
+#include <skalibs/bytestr.h>
+#include <skalibs/sgetopt.h>
+#include <skalibs/buffer.h>
+#include <skalibs/strerr2.h>
+#include <skalibs/netstring.h>
+
+#define USAGE "s6-printenv [ -n ] [ -0 | -d delimchar ]"
+
+int main (int argc, char const *const *argv, char const *const *envp)
+{
+  char delim = '\n' ;
+  int zero = 0, nl = 1 ;
+  PROG = "s6-printenv" ;
+  {
+    subgetopt_t l = SUBGETOPT_ZERO ;
+    for (;;)
+    {
+      register int opt = subgetopt_r(argc, argv, "nd:0", &l) ;
+      if (opt == -1) break ;
+      switch (opt)
+      {
+        case 'n' : nl = 0 ; break ;
+        case 'd' : delim = *l.arg ; break ;
+        case '0' : zero = 1 ; break ;
+        default : strerr_dieusage(100, USAGE) ;
+      }
+    }
+    argc -= l.ind ; argv += l.ind ;
+  }
+  if (zero) delim = 0 ;
+  for (; *envp ; envp++)
+  {
+    if (delim || zero)
+    {
+      if ((buffer_puts(buffer_1, *envp) < 0)
+       || ((nl || envp[1]) && (buffer_put(buffer_1, &delim, 1) < 0)))
+        strerr_diefu1sys(111, "write to stdout") ;
+    }
+    else
+    {
+      unsigned int written = 0 ;
+      if (!netstring_put(buffer_1, *envp, str_len(*envp), &written))
+        strerr_diefu1sys(111, "write a netstring to stdout") ;
+    }
+  }
+  if (!buffer_flush(buffer_1))
+    strerr_diefu1sys(111, "write to stdout") ;
+  return 0 ;
+}