From 7d629481d48982c3ab7882afbdea8f38cfe96524 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?P=C3=A1draig=20Brady?= <address@hidden>
Date: Tue, 17 Feb 2015 23:50:17 +0000
Subject: [PATCH] tee: treat '-' as a regular file with $POSIXLY_CORRECT

* src/tee.c (usage): Adjust according to getenv("POSIXLY_CORRECT").
(main): Likewise.
---
 src/tee.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/tee.c b/src/tee.c
index 4f185d6..b9390b9 100644
--- a/src/tee.c
+++ b/src/tee.c
@@ -44,6 +44,9 @@ static bool append;
 /* If true, ignore interrupts. */
 static bool ignore_interrupts;
 
+/* Whether '-' means stdout.  */
+static bool posixly_correct;
+
 enum write_error
   {
     write_error_sigpipe,      /* traditional behavior, sigpipe enabled.  */
@@ -95,7 +98,8 @@ Copy standard input to each FILE, and also to standard output.\n\
 "), stdout);
       fputs (HELP_OPTION_DESCRIPTION, stdout);
       fputs (VERSION_OPTION_DESCRIPTION, stdout);
-      fputs (_("\
+      if (! posixly_correct)
+        fputs (_("\
 \n\
 If a FILE is -, copy again to standard output.\n\
 "), stdout);
@@ -130,6 +134,8 @@ main (int argc, char **argv)
 
   atexit (close_stdout);
 
+  posixly_correct = !!getenv ("POSIXLY_CORRECT");
+
   append = false;
   ignore_interrupts = false;
 
@@ -219,7 +225,7 @@ tee_files (int nfiles, const char **files)
 
   for (i = 1; i <= nfiles; i++)
     {
-      descriptors[i] = (STREQ (files[i], "-")
+      descriptors[i] = (! posixly_correct && STREQ (files[i], "-")
                         ? stdout
                         : fopen (files[i], mode_string));
       if (descriptors[i] == NULL)
-- 
2.1.0