fd2.1 - nroff source : Read fd2(1) in pdf, ps, or txt form. FD2(1) General Commands FD2(1) NAME fd2 - redirect from/to file descriptor 2 SYNOPSIS fd2 [-e] [-f file] [--] command [arg ...] DESCRIPTION Since the Sixth Edition UNIX shell provides no way to redirect the diagnostic output, fd2 makes this possible by executing the specified command with the given arguments and redirecting file descriptor 2 (standard error) to file descriptor 1 (standard output) by default. The options are as follows: -e Causes all conventional output from command to be redirected to the standard error as diagnostic output. -f file Causes all diagnostic output from command to be redirected to file, which is created if it does not exist. If it already exists, all diagnostic output is appended to the end of file. -- Causes fd2 to stop further option processing, forcing it to treat all following arguments as command [arg ...] . EXIT STATUS If fd2 detects an error, it prints an appropriate diagnostic and exits with a non-zero status. Otherwise, the exit status is that of the exe- cuted command. ENVIRONMENT EXECSHELL If set to a non-empty string, the value of this variable is taken as the path name of the shell which is invoked to execute the specified command when it does not begin with the proper magic number or a `#!shell' sequence. PATH If set to a non-empty string, the value of this variable is taken as the sequence of directories which is used to search for the specified command. EXAMPLES The examples below which refer to `/tmp/$$' assume that this directory exists and is writable by the user. The following command line: fd2 -e echo progname: Error message causes all conventional output from echo to be redirected to the stan- dard error as diagnostic output. The following command line: fd2 make foo >/tmp/$$/foo.outerr causes all conventional and diagnostic output from make to be redi- rected to the file `/tmp/$$/foo.outerr', which is first created by the shell. In contrast: fd2 -f /tmp/$$/foo.err make foo >/tmp/$$/foo.out causes all conventional output to be redirected to the file `/tmp/$$/foo.out', which is created by the shell. All diagnostic out- put is redirected to the file `/tmp/$$/foo.err', which is created by fd2 if it does not already exist. SEE ALSO osh(1), sh6(1) Osh home page: http://v6shell.org/ AUTHOR This implementation of fd2 is written by Jeffrey Allen Neitzel. LICENSE See either the LICENSE file which is distributed with osh or http://v6shell.org/license/ for full details. COPYRIGHT Copyright (c) 2005-2012 Jeffrey Allen Neitzel. All rights reserved. Copyright (c) 1985, 1989, 1991, 1993 The Regents of the University of California. All rights reserved. osh-20120102 January 2, 2012 FD2(1)
