# Test whether a file descriptor is a pipe.
-dnl Copyright (C) 2006, 2009-2010 Free Software Foundation, Inc.
+dnl Copyright (C) 2006, 2009-2011 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
AC_DEFUN([gl_ISAPIPE],
[
# OpenVMS has isapipe already, so check for it.
- AC_REPLACE_FUNCS([isapipe])
- if test $ac_cv_func_isapipe = no; then
- gl_PREREQ_ISAPIPE
+ AC_CHECK_FUNCS([isapipe])
+ if test $ac_cv_func_isapipe = yes; then
+ HAVE_ISAPIPE=1
+ else
+ HAVE_ISAPIPE=0
fi
])
{
int fd[2];
struct stat st;
- if (pipe (fd) != 0 || fstat (fd[0], &st) != 0)
+ if (pipe (fd) != 0)
return 1;
+ if (fstat (fd[0], &st) != 0)
+ return 2;
if (2 <= argc && argv[1][0] == '-')
{
char const *yesno = (S_ISFIFO (st.st_mode) ? "yes" : "no");
{
long int i = st.st_nlink;
if (i != st.st_nlink)
- return 1;
+ return 3;
printf ("%s (%ld)\n", yesno, i);
}
else
{
unsigned long int i = st.st_nlink;
if (i != st.st_nlink)
- return 1;
+ return 4;
printf ("%s (%lu)\n", yesno, i);
}
}
else
{
if (! S_ISFIFO (st.st_mode) && ! S_ISSOCK (st.st_mode))
- return 1;
+ return 5;
}
return 0;
}]])],