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Let the pwd program double as realpath(1).

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This lets you resolve pathnames to their underlying physical path:

	critter# realpath /sys/kern/subr_disk.c
	/freebsd/src/sys/kern/subr_disk.c

Update the pwd man-page slightly.
This commit is contained in:
Poul-Henning Kamp 2000-11-24 10:18:52 +00:00
parent 92ee29d2a5
commit 1082b68736
5 changed files with 156 additions and 6 deletions
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2
bin/pwd/Makefile
View File

@ -2,5 +2,7 @@
# $FreeBSD$
PROG= pwd
LINKS= ${BINDIR}/pwd ${BINDIR}/realpath
MAN1= pwd.1 realpath.1
.include <bsd.prog.mk>

3
bin/pwd/pwd.1
View File

@ -64,6 +64,9 @@ The
utility is expected to be
.St -p1003.2
compatible.
The
.Fl L
flag is not supported.
.Sh SEE ALSO
.Xr builtin 1 ,
.Xr cd 1 ,

21
bin/pwd/pwd.c
View File

@ -49,6 +49,7 @@ static const char rcsid[] =
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/param.h>
void usage __P((void));
@ -59,13 +60,13 @@ main(argc, argv)
{
int ch;
char *p;
char buf[MAXPATHLEN];
/*
* Flags for pwd are a bit strange. The POSIX 1003.2B/D9 document
* has an optional -P flag for physical, which is what this program
* will produce by default. The logical flag, -L, should fail, as
* there's no way to display a logical path after forking. We don't
* document either flag, only adding -P for future portability.
* there's no way to display a logical path after forking.
*/
while ((ch = getopt(argc, argv, "P")) != -1)
switch (ch) {
@ -78,12 +79,20 @@ main(argc, argv)
argc -= optind;
argv += optind;
if (argc != 0)
if (argc == 1) {
p = realpath(argv[0], buf);
if (p == NULL)
err(1, argv[0]);
(void)printf("%s\n", p);
} else if (argc == 0) {
p = getcwd(NULL, 0);
if (p == NULL)
err(1, ".");
(void)printf("%s\n", p);
} else {
usage();
}
if ((p = getcwd(NULL, 0)) == NULL)
err(1, ".");
(void)printf("%s\n", p);
exit(0);
}

68
bin/pwd/realpath.1 Normal file
View File

@ -0,0 +1,68 @@
.\" 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. All advertising materials mentioning features or use of this software
.\" must display the following acknowledgement:
.\" This product includes software developed by the University of
.\" California, Berkeley and its contributors.
.\" 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
.\" From: src/bin/pwd/pwd.1,v 1.11 2000/11/20 11:39:39 ru Exp
.\" $FreeBSD$
.\"
.Dd November 24, 2000
.Dt REALPATH 1
.Os FreeBSD 5.0
.Sh NAME
.Nm realpath
.Nd return resolved physical path
.Sh SYNOPSIS
.Nm
.Ar path
.Sh DESCRIPTION
.Nm realpath
uses the
.Xr realpath 3
function to resolve all symbolic links, extra
.Qo
/
.Qc
characters and references to
.Pa /./
and
.Pa /../
in
.Ar path .
.Pp
.Sh DIAGNOSTICS
The
.Nm
utility exits 0 on success, and >0 if an error occurs.
.Sh SEE ALSO
.Xr realpath 3

68
bin/realpath/realpath.1 Normal file
View File

@ -0,0 +1,68 @@
.\" 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. All advertising materials mentioning features or use of this software
.\" must display the following acknowledgement:
.\" This product includes software developed by the University of
.\" California, Berkeley and its contributors.
.\" 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
.\" From: src/bin/pwd/pwd.1,v 1.11 2000/11/20 11:39:39 ru Exp
.\" $FreeBSD$
.\"
.Dd November 24, 2000
.Dt REALPATH 1
.Os FreeBSD 5.0
.Sh NAME
.Nm realpath
.Nd return resolved physical path
.Sh SYNOPSIS
.Nm
.Ar path
.Sh DESCRIPTION
.Nm realpath
uses the
.Xr realpath 3
function to resolve all symbolic links, extra
.Qo
/
.Qc
characters and references to
.Pa /./
and
.Pa /../
in
.Ar path .
.Pp
.Sh DIAGNOSTICS
The
.Nm
utility exits 0 on success, and >0 if an error occurs.
.Sh SEE ALSO
.Xr realpath 3