1 files changed, 146 insertions, 0 deletions
diff --git a/examples/loadables/mkfifo.c b/examples/loadables/mkfifo.c
new file mode 100644
index 0000000..2bc4e98
--- /dev/null
+++ b/examples/loadables/mkfifo.c
@@ -0,0 +1,146 @@
+/* mkfifo - make FIFOs */
+
+/* See Makefile for compilation details. */
+
+/*
+   Copyright (C) 1999-2020 Free Software Foundation, Inc.
+
+   This file is part of GNU Bash.
+   Bash is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   Bash is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with Bash.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <config.h>
+
+#include "bashtypes.h"
+#include "posixstat.h"
+#include <errno.h>
+#include <stdio.h>
+#include "bashansi.h"
+#if defined (HAVE_UNISTD_H)
+#  include <unistd.h>
+#endif
+
+#include "builtins.h"
+#include "shell.h"
+#include "bashgetopt.h"
+#include "common.h"
+
+#if !defined (errno)
+extern int errno;
+#endif
+
+#define ISOCTAL(c)	((c) >= '0' && (c) <= '7')
+
+extern int parse_symbolic_mode ();
+
+static int original_umask;
+
+int
+mkfifo_builtin (list)
+     WORD_LIST *list;
+{
+  int opt, mflag, omode, rval, nmode, basemode;
+  char *mode;
+  WORD_LIST *l;
+
+  mflag = 0;
+  mode = (char *)NULL;
+
+  reset_internal_getopt ();
+  while ((opt = internal_getopt(list, "m:")) != -1)
+    switch (opt)
+      {
+	case 'm':
+	  mflag = 1;
+	  mode = list_optarg;
+	  break;
+	CASE_HELPOPT;
+	default:
+	  builtin_usage();
+	  return (EX_USAGE);
+      }
+  list = loptend;
+
+  if (list == 0)
+    {
+      builtin_usage ();
+      return (EX_USAGE);
+    }
+
+  basemode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
+  if (mode == NULL)
+    omode = basemode;
+  else if (ISOCTAL (*mode))	/* octal number */
+    {
+      omode = read_octal (mode);
+      if (omode < 0)
+	{
+	  builtin_error ("invalid file mode: %s", mode);
+	  return (EXECUTION_FAILURE);
+	}
+    }
+  else 				/* symbolic mode */
+    {
+      /* initial bits are a=rwx; the mode argument modifies them */
+      omode = parse_symbolic_mode (mode, basemode);
+      if (omode < 0)
+	{
+	  builtin_error ("invalid file mode: %s", mode);
+	  return (EXECUTION_FAILURE);
+	}
+    }
+
+  /* Make the new mode */
+  original_umask = umask (0);
+  umask (original_umask);
+
+  nmode = basemode & ~original_umask;
+  /* Adjust new mode based on mode argument */
+  nmode &= omode;
+
+  for (rval = EXECUTION_SUCCESS, l = list; l; l = l->next)
+    {
+      if (mkfifo (l->word->word, nmode) < 0)
+        {
+          builtin_error ("cannot create FIFO `%s': %s", l->word->word, strerror (errno));
+          rval = EXECUTION_FAILURE;
+        }
+    }
+  return rval;
+}
+
+
+char *mkfifo_doc[] = {
+	"Create FIFOs (named pipes).",
+	"",
+	"Make FIFOs.  Create the FIFOs named as arguments, in",
+	"the order specified, using mode a=rw as modified by the current",
+	"umask (see `help umask').  The -m option causes the file permission",
+	"bits of the final FIFO to be MODE.  The MODE argument may be",
+	"an octal number or a symbolic mode like that used by chmod(1).  If",
+	"a symbolic mode is used, the operations are interpreted relative to",
+	"an initial mode of \"a=rw\".  mkfifo returns 0 if the FIFOs are",
+	"umask, plus write and search permissions for the owner.  mkdir",
+	"created successfully, and non-zero if an error occurs.",
+	(char *)NULL
+};
+
+struct builtin mkfifo_struct = {
+	"mkfifo",
+	mkfifo_builtin,
+	BUILTIN_ENABLED,
+	mkfifo_doc,
+	"mkfifo [-m mode] fifo_name [fifo_name ...]",
+	0
+};