diff options
Diffstat (limited to 'bin/pwd')
| -rw-r--r-- | bin/pwd/pwd.1 | 110 | ||||
| -rw-r--r-- | bin/pwd/pwd.c | 143 |
2 files changed, 253 insertions, 0 deletions
diff --git a/bin/pwd/pwd.1 b/bin/pwd/pwd.1 new file mode 100644 index 0000000..bbdaf32 --- /dev/null +++ b/bin/pwd/pwd.1 @@ -0,0 +1,110 @@ +.\" $NetBSD: pwd.1,v 1.27 2017/07/04 06:50:37 wiz Exp $ +.\" +.\" 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. +.\" 3. 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 +.\" +.Dd August 12, 2016 +.Dt PWD 1 +.Os +.Sh NAME +.Nm pwd +.Nd return working directory name +.Sh SYNOPSIS +.Nm +.Op Fl LP +.Sh DESCRIPTION +.Nm +writes the absolute pathname of the current working directory to +the standard output. +.Pp +The following options are available: +.Bl -tag -width indent +.It Fl L +If the +.Ev PWD +environment variable is an absolute pathname that contains +neither "/./" nor "/../" and references the current directory, then +.Ev PWD +is assumed to be the name of the current directory. +.It Fl P +Print the physical path to the current working directory, with symbolic +links in the path resolved. +.El +.Pp +The default for the +.Nm +command is +.Fl P . +.Pp +.Nm +is usually provided as a shell builtin (which may have a different +default). +.Sh EXIT STATUS +.Ex -std pwd +.Sh SEE ALSO +.Xr cd 1 , +.Xr csh 1 , +.Xr ksh 1 , +.Xr sh 1 , +.Xr getcwd 3 +.Sh STANDARDS +The +.Nm +utility is expected to be conforming to +.St -p1003.1 , +except that the default is +.Fl P +not +.Fl L . +.Sh HISTORY +A +.Nm +utility appeared in +.At v5 . +.Sh BUGS +In +.Xr csh 1 +the command +.Ic dirs +is always faster (although 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 +.Nm +.Fl L +relies on the file system having unique inode numbers. +If this is not true (e.g., on FAT file systems) then +.Nm +.Fl L +may fail to detect that +.Ev PWD +is incorrect. diff --git a/bin/pwd/pwd.c b/bin/pwd/pwd.c new file mode 100644 index 0000000..27888eb --- /dev/null +++ b/bin/pwd/pwd.c @@ -0,0 +1,143 @@ +/* $NetBSD: pwd.c,v 1.22 2011/08/29 14:51:19 joerg Exp $ */ + +/* + * 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. + * 3. 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. + */ + +#include <sys/cdefs.h> +#ifndef lint +__COPYRIGHT("@(#) Copyright (c) 1991, 1993, 1994\ + The Regents of the University of California. All rights reserved."); +#endif /* not lint */ + +#ifndef lint +#if 0 +static char sccsid[] = "@(#)pwd.c 8.3 (Berkeley) 4/1/94"; +#else +__RCSID("$NetBSD: pwd.c,v 1.22 2011/08/29 14:51:19 joerg Exp $"); +#endif +#endif /* not lint */ + +#include <sys/param.h> +#include <sys/stat.h> +#include <sys/types.h> + +#include <err.h> +#include <errno.h> +#include <locale.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +static char *getcwd_logical(void); +__dead static void usage(void); + +/* + * Note that EEE Std 1003.1, 2003 requires that the default be -L. + * This is inconsistent with the historic behaviour of everything + * except the ksh builtin. + * To avoid breaking scripts the default has been kept as -P. + * (Some scripts run /bin/pwd in order to get 'pwd -P'.) + */ + +int +main(int argc, char *argv[]) +{ + int ch, lFlag; + const char *p; + + setprogname(argv[0]); + (void)setlocale(LC_ALL, ""); + + lFlag = 0; + while ((ch = getopt(argc, argv, "LP")) != -1) { + switch (ch) { + case 'L': + lFlag = 1; + break; + case 'P': + lFlag = 0; + break; + case '?': + default: + usage(); + } + } + argc -= optind; + argv += optind; + + if (argc != 0) + usage(); + + if (lFlag) + p = getcwd_logical(); + else + p = NULL; + if (p == NULL) + p = getcwd(NULL, 0); + + if (p == NULL) + err(EXIT_FAILURE, NULL); + + (void)printf("%s\n", p); + + exit(EXIT_SUCCESS); + /* NOTREACHED */ +} + +static char * +getcwd_logical(void) +{ + char *pwd; + struct stat s_pwd, s_dot; + + /* Check $PWD -- if it's right, it's fast. */ + pwd = getenv("PWD"); + if (pwd == NULL) + return NULL; + if (pwd[0] != '/') + return NULL; + if (strstr(pwd, "/./") != NULL) + return NULL; + if (strstr(pwd, "/../") != NULL) + return NULL; + if (stat(pwd, &s_pwd) == -1 || stat(".", &s_dot) == -1) + return NULL; + if (s_pwd.st_dev != s_dot.st_dev || s_pwd.st_ino != s_dot.st_ino) + return NULL; + return pwd; +} + +static void +usage(void) +{ + (void)fprintf(stderr, "usage: %s [-LP]\n", getprogname()); + exit(EXIT_FAILURE); + /* NOTREACHED */ +} |