-# pwrite.m4 serial 2
-dnl Copyright (C) 2010 Free Software Foundation, Inc.
+# pwrite.m4 serial 3
+dnl Copyright (C) 2010-2011 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_CHECK_FUNCS_ONCE([pwrite])
if test $ac_cv_func_pwrite = yes; then
dnl On HP-UX 11.11 with _FILE_OFFSET_BITS=64, pwrite() on a file does not
- dnl fail when an invalid (negative) offset is passed.
+ dnl fail when an invalid (negative) offset is passed and uses an arbitrary
+ dnl offset instead of the argument.
AC_CACHE_CHECK([whether pwrite works],
[gl_cv_func_pwrite_works],
[
CPPFLAGS="$CPPFLAGS -D_FILE_OFFSET_BITS=64"
rm -f conftest.out
AC_RUN_IFELSE(
- [AC_LANG_SOURCE([[
+ [AC_LANG_PROGRAM([[
#include <sys/types.h>
#include <unistd.h>
#include <fcntl.h>
if (pwrite (fd, "b", 1, (off_t) -1) >= 0)
return 2;
}
+ /* This test fails on HP-UX 11.00..11.11. */
+ {
+ int fd;
+ char buf[] = "01";
+
+ fd = open ("conftest.out", O_WRONLY | O_CREAT | O_TRUNC, 0600);
+ if (fd < 0)
+ return 3;
+ if (write (fd, buf, 2) < 2)
+ return 4;
+ if (close (fd) < 0)
+ return 5;
+
+ fd = open ("conftest.out", O_WRONLY, 0600);
+ if (fd < 0)
+ return 6;
+ if (pwrite (fd, "W", 1, (off_t) 0) != 1)
+ return 7;
+ if (close (fd) < 0)
+ return 8;
+
+ fd = open ("conftest.out", O_RDONLY);
+ if (fd < 0)
+ return 9;
+ if (read (fd, buf, 2) < 2)
+ return 10;
+ if (close (fd) < 0)
+ return 11;
+ if (buf[0] != 'W')
+ return 12;
+ if (buf[1] != '1')
+ return 13;
+ }
+ return 0;
+}
+
+
return 0;
}]])],
[gl_cv_func_pwrite_works=yes],