diff options
Diffstat (limited to 'bin/pwd')
| -rw-r--r-- | bin/pwd/Makefile | 4 | ||||
| -rw-r--r-- | bin/pwd/Makefile.depend | 15 | ||||
| -rw-r--r-- | bin/pwd/pwd.1 | 124 | ||||
| -rw-r--r-- | bin/pwd/pwd.c | 111 |
4 files changed, 254 insertions, 0 deletions
diff --git a/bin/pwd/Makefile b/bin/pwd/Makefile new file mode 100644 index 000000000000..f6065e1d5b9f --- /dev/null +++ b/bin/pwd/Makefile @@ -0,0 +1,4 @@ +PACKAGE=runtime +PROG= pwd + +.include <bsd.prog.mk> diff --git a/bin/pwd/Makefile.depend b/bin/pwd/Makefile.depend new file mode 100644 index 000000000000..6ef78fac5cbf --- /dev/null +++ b/bin/pwd/Makefile.depend @@ -0,0 +1,15 @@ +# Autogenerated - do NOT edit! + +DIRDEPS = \ + include \ + include/xlocale \ + lib/${CSU_DIR} \ + lib/libc \ + lib/libcompiler_rt \ + + +.include <dirdeps.mk> + +.if ${DEP_RELDIR} == ${_DEP_RELDIR} +# local dependencies - needed for -jN in clean tree +.endif diff --git a/bin/pwd/pwd.1 b/bin/pwd/pwd.1 new file mode 100644 index 000000000000..ce81e443d98e --- /dev/null +++ b/bin/pwd/pwd.1 @@ -0,0 +1,124 @@ +.\"- +.\" 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. +.\" +.Dd May 22, 2023 +.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 +.Fl P +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 EXAMPLES +Show current working directory with symbolic links resolved: +.Bd -literal -offset indent +$ /bin/pwd +/usr/src/sys/kern +.Ed +.Pp +Show the logical current directory. +Then use +.Xr file 1 +to inspect the +.Pa /sys +directory: +.Bd -literal -offset indent +$ /bin/pwd -L +/sys/kern +$ file /sys +/sys: symbolic link to usr/src/sys +.Ed +.Sh SEE ALSO +.Xr builtin 1 , +.Xr cd 1 , +.Xr csh 1 , +.Xr realpath 1 , +.Xr sh 1 , +.Xr getcwd 3 +.Sh STANDARDS +The +.Nm +utility conforms to +.St -p1003.1-2001 . +.Sh HISTORY +The +.Nm +command appeared in +.At v5 . +.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/bin/pwd/pwd.c b/bin/pwd/pwd.c new file mode 100644 index 000000000000..a49c638b1dee --- /dev/null +++ b/bin/pwd/pwd.c @@ -0,0 +1,111 @@ +/*- + * SPDX-License-Identifier: BSD-3-Clause + * + * 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/param.h> +#include <sys/stat.h> +#include <sys/types.h> + +#include <err.h> +#include <errno.h> +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> + +static char *getcwd_logical(void); +void usage(void); + +int +main(int argc, char *argv[]) +{ + int physical; + int ch; + char *p; + + physical = 1; + 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. + */ + if ((!physical && (p = getcwd_logical()) != NULL) || + (p = getcwd(NULL, 0)) != NULL) + printf("%s\n", p); + else + err(1, "."); + + exit(0); +} + +void __dead2 +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); +} |