From 5fd83771641d15c418f747bd343ba6738d3875f7 Mon Sep 17 00:00:00 2001 From: Cameron Katri Date: Sun, 9 May 2021 14:20:58 -0400 Subject: Import macOS userland adv_cmds-176 basic_cmds-55 bootstrap_cmds-116.100.1 developer_cmds-66 diskdev_cmds-667.40.1 doc_cmds-53.60.1 file_cmds-321.40.3 mail_cmds-35 misc_cmds-34 network_cmds-606.40.1 patch_cmds-17 remote_cmds-63 shell_cmds-216.60.1 system_cmds-880.60.2 text_cmds-106 --- shell_cmds/pwd/pwd.1 | 103 +++++++++++++++++++++++++++++++++++++++++ shell_cmds/pwd/pwd.c | 127 +++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 230 insertions(+) create mode 100644 shell_cmds/pwd/pwd.1 create mode 100644 shell_cmds/pwd/pwd.c (limited to 'shell_cmds/pwd') diff --git a/shell_cmds/pwd/pwd.1 b/shell_cmds/pwd/pwd.1 new file mode 100644 index 0000000..929c4b3 --- /dev/null +++ b/shell_cmds/pwd/pwd.1 @@ -0,0 +1,103 @@ +.\"- +.\" Copyright (c) 1990, 1993 +.\" The Regents of the University of California. All rights reserved. +.\" +.\" This code is derived from software contributed to Berkeley by +.\" the Institute of Electrical and Electronics Engineers, Inc. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" 4. Neither the name of the University nor the names of its contributors +.\" may be used to endorse or promote products derived from this software +.\" without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.\" @(#)pwd.1 8.2 (Berkeley) 4/28/95 +.\" $FreeBSD: src/bin/pwd/pwd.1,v 1.26 2005/01/16 16:41:58 ru Exp $ +.\" +.Dd April 12, 2003 +.Dt PWD 1 +.Os +.Sh NAME +.Nm pwd +.Nd return working directory name +.Sh SYNOPSIS +.Nm +.Op Fl L | P +.Sh DESCRIPTION +The +.Nm +utility writes the absolute pathname of the current working directory to +the standard output. +.Pp +Some shells may provide a builtin +.Nm +command which is similar or identical to this utility. +Consult the +.Xr builtin 1 +manual page. +.Pp +The options are as follows: +.Bl -tag -width indent +.It Fl L +Display the logical current working directory. +.It Fl P +Display the physical current working directory (all symbolic links resolved). +.El +.Pp +If no options are specified, the +.\" 4207130 +.Fl L +option is assumed. +.Sh ENVIRONMENT +Environment variables used by +.Nm : +.Bl -tag -width ".Ev PWD" +.It Ev PWD +Logical current working directory. +.El +.Sh EXIT STATUS +.Ex -std +.Sh SEE ALSO +.Xr builtin 1 , +.Xr cd 1 , +.Xr csh 1 , +.Xr sh 1 , +.Xr getcwd 3 +.Sh STANDARDS +The +.Nm +utility conforms to +.St -p1003.1-2001 . +.Sh BUGS +In +.Xr csh 1 +the command +.Ic dirs +is always faster because it is built into that shell. +However, it can give a different answer in the rare case +that the current directory or a containing directory was moved after +the shell descended into it. +.Pp +The +.Fl L +option does not work unless the +.Ev PWD +environment variable is exported by the shell. diff --git a/shell_cmds/pwd/pwd.c b/shell_cmds/pwd/pwd.c new file mode 100644 index 0000000..c5788b1 --- /dev/null +++ b/shell_cmds/pwd/pwd.c @@ -0,0 +1,127 @@ +/*- + * Copyright (c) 1991, 1993, 1994 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#if 0 +#ifndef lint +static char const copyright[] = +"@(#) Copyright (c) 1991, 1993, 1994\n\ + The Regents of the University of California. All rights reserved.\n"; +#endif /* not lint */ + +#ifndef lint +static char sccsid[] = "@(#)pwd.c 8.3 (Berkeley) 4/1/94"; +#endif /* not lint */ +#endif +#include +__FBSDID("$FreeBSD: src/bin/pwd/pwd.c,v 1.25 2005/02/09 17:37:38 ru Exp $"); + +#include +#include +#include + +#include +#include +#include +#include +#include + +static char *getcwd_logical(void); +void usage(void); + +int +main(int argc, char *argv[]) +{ + int physical; + int ch; + char *p; + + // 4207130 + physical = 0; + while ((ch = getopt(argc, argv, "LP")) != -1) + switch (ch) { + case 'L': + physical = 0; + break; + case 'P': + physical = 1; + break; + case '?': + default: + usage(); + } + argc -= optind; + argv += optind; + + if (argc != 0) + usage(); + + /* + * If we're trying to find the logical current directory and that + * fails, behave as if -P was specified. + * + * 4701537: Only fall back if $PWD was actually wrong. We want to + * fail if the path is too long (errno == ENAMETOOLONG). + */ + if ((!physical && (p = getcwd_logical()) != NULL) || + ((physical || errno == ENOENT) && (p = getcwd(NULL, 0)) != NULL)) + printf("%s\n", p); + else + err(1, "."); + + exit(0); +} + +void +usage(void) +{ + + (void)fprintf(stderr, "usage: pwd [-L | -P]\n"); + exit(1); +} + +static char * +getcwd_logical(void) +{ + struct stat lg, phy; + char *pwd; + + /* + * Check that $PWD is an absolute logical pathname referring to + * the current working directory. + */ + if ((pwd = getenv("PWD")) != NULL && *pwd == '/') { + if (stat(pwd, &lg) == -1 || stat(".", &phy) == -1) + return (NULL); + if (lg.st_dev == phy.st_dev && lg.st_ino == phy.st_ino) + return (pwd); + } + + errno = ENOENT; + return (NULL); +} -- cgit v1.2.3-56-ge451