2 files changed, 29 insertions, 0 deletions
diff --git a/src/vppinfra/format.h b/src/vppinfra/format.h
index bec1b6b410d..5b7023a3023 100644
--- a/src/vppinfra/format.h
+++ b/src/vppinfra/format.h
@@ -310,6 +310,9 @@ void unformat_init_unix_file (unformat_input_t * input, int file_descriptor);
 /* Take input from Unix environment variable; returns
    1 if variable exists zero otherwise. */
 uword unformat_init_unix_env (unformat_input_t * input, char *var);
+
+/* Unformat unix group id (gid) specified as integer or string */
+unformat_function_t unformat_unix_gid;
 #endif /* CLIB_UNIX */
 
 /* Test code. */
diff --git a/src/vppinfra/unix-formats.c b/src/vppinfra/unix-formats.c
index a4c81ca2f70..91986516108 100644
--- a/src/vppinfra/unix-formats.c
+++ b/src/vppinfra/unix-formats.c
@@ -49,6 +49,7 @@
 
 #include <unistd.h>
 #include <signal.h>
+#include <grp.h>
 
 #include <time.h>
 #include <sys/socket.h>
@@ -915,4 +916,29 @@ u8 * format_ucontext_pc (u8 * s, va_list * args)
     return format (s, "%p", regs[reg_no]);
 }
 
+uword
+unformat_unix_gid (unformat_input_t * input, va_list * args)
+{
+  gid_t *gid = va_arg (*args, gid_t *);
+  struct group *grp = 0;
+  int r;
+  u8 *s;
+
+  if (unformat (input, "%d", &r))
+    {
+      grp = getgrgid (r);
+    }
+  else if (unformat (input, "%s", &s))
+    {
+      grp = getgrnam ((char *) s);
+      vec_free (s);
+    }
+  if (grp)
+    {
+      *gid = grp->gr_gid;
+      return 1;
+    }
+  return 0;
+}
+
 #endif /* __KERNEL__ */