From 772f20abb0a3a0979c440114bf3a1cff5b3cef03 Mon Sep 17 00:00:00 2001
From: cvpcs <root@cvpcs.org>
Date: Wed, 2 Jun 2010 11:02:31 -0500
Subject: initial import of bash 4.1

---
 examples/loadables/tee.c | 178 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 178 insertions(+)
 create mode 100644 examples/loadables/tee.c

(limited to 'examples/loadables/tee.c')

diff --git a/examples/loadables/tee.c b/examples/loadables/tee.c
new file mode 100644
index 0000000..8b5715f
--- /dev/null
+++ b/examples/loadables/tee.c
@@ -0,0 +1,178 @@
+/* tee - duplicate standard input */
+
+/* See Makefile for compilation details. */
+
+/*
+   Copyright (C) 1999-2009 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 "filecntl.h"
+
+#include <signal.h>
+
+#if defined (HAVE_UNISTD_H)
+#  include <unistd.h>
+#endif
+
+#include "bashansi.h"
+
+#include <stdio.h>
+#include <errno.h>
+
+#include "builtins.h"
+#include "shell.h"
+#include "bashgetopt.h"
+#include "common.h"
+
+#if !defined (errno)
+extern int errno;
+#endif
+
+typedef struct flist {
+  struct flist *next;
+  int fd;
+  char *fname;
+} FLIST;
+
+static FLIST *tee_flist;
+
+#define TEE_BUFSIZE	8192
+
+extern int interrupt_immediately;
+
+extern char *strerror ();
+
+tee_builtin (list)
+     WORD_LIST *list;
+{
+  int opt, append, nointr, rval, fd, fflags;
+  int n, nr, nw;
+  FLIST *fl;
+  char *buf, *bp;
+
+  char *t;
+
+  reset_internal_getopt ();
+  append = nointr = 0;
+  tee_flist = (FLIST *)NULL;
+  while ((opt = internal_getopt (list, "ai")) != -1)
+    {
+      switch (opt)
+	{
+	case 'a':
+	  append = 1;
+	  break;
+	case 'i':
+	  nointr = 1;
+	  break;
+	default:
+	  builtin_usage ();
+	  return (EX_USAGE);
+	}
+    }
+  list = loptend;
+
+  if (nointr == 0)
+    interrupt_immediately++;
+
+  buf = xmalloc (TEE_BUFSIZE);
+
+  /* Initialize output file list. */
+  fl = tee_flist = (FLIST *)xmalloc (sizeof(FLIST));
+  tee_flist->fd = 1;
+  tee_flist->fname = "stdout";
+  tee_flist->next = (FLIST *)NULL;
+
+  /* Add file arguments to list of output files. */
+  fflags = append ? O_WRONLY|O_CREAT|O_APPEND : O_WRONLY|O_CREAT|O_TRUNC;
+  for (rval = EXECUTION_SUCCESS; list; list = list->next)
+    {
+      fd = open (list->word->word, fflags, 0666);
+      if (fd < 0)
+        {
+          builtin_error ("%s: cannot open: %s", list->word->word, strerror (errno));
+          rval = EXECUTION_FAILURE;
+        }
+      else
+        {
+          fl->next = (FLIST *)xmalloc (sizeof(FLIST));
+          fl->next->fd = fd;
+          fl->next->fname = list->word->word;
+          fl = fl->next;
+          fl->next = (FLIST *)NULL;
+        }
+    }
+
+  while ((nr = read(0, buf, TEE_BUFSIZE)) > 0)
+    for (fl = tee_flist; fl; fl = fl->next)
+      {
+	n = nr;
+	bp = buf;
+	do
+	  {
+	    if ((nw = write (fl->fd, bp, n)) == -1)
+	      {
+		builtin_error ("%s: write error: %s", fl->fname, strerror (errno));
+		rval = EXECUTION_FAILURE;
+		break;
+	      }
+            bp += nw;
+	  }
+	while (n -= nw);
+      }
+  if (nr < 0)
+    builtin_error ("read error: %s", strerror (errno));
+
+  /* Deallocate resources -- this is a builtin command. */
+  tee_flist = tee_flist->next;		/* skip bogus close of stdout */
+  while (tee_flist)
+    {
+      fl = tee_flist;
+      if (close (fl->fd) < 0)
+	{
+	  builtin_error ("%s: close_error: %s", fl->fname, strerror (errno));
+	  rval = EXECUTION_FAILURE;
+	}
+      tee_flist = tee_flist->next;
+      free (fl);
+    }
+  
+  return (rval);
+}
+
+char *tee_doc[] = {
+	"Duplicate standard output.",
+	"",
+	"Copy standard input to standard output, making a copy in each",
+	"filename argument.  If the `-a' option is gived, the specified",
+	"files are appended to, otherwise they are overwritten.  If the",
+	"`-i' option is supplied, tee ignores interrupts.",
+	(char *)NULL
+};
+
+struct builtin tee_struct = {
+	"tee",			/* builtin name */
+	tee_builtin,		/* function implementing the builtin */
+	BUILTIN_ENABLED,	/* initial flags for builtin */
+	tee_doc,		/* array of long documentation strings. */
+	"tee [-ai] [file ...]",	/* usage synopsis; becomes short_doc */
+	0			/* reserved for internal use */
+};
-- 
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