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Add the new userland tool for manipulating extended attributes.

Browse source 
This will replace the existing getextattr(8) and setextattr(8) with
a single binary responding to the names getextattr, setextattr,
rmextattr and lsextattr.

This program is not yet connected to the build.

Sponsored by: DARPA and NAI Labs.
This commit is contained in:
Poul-Henning Kamp 2002-08-30 08:53:03 +00:00
parent 6bb1d8eec5
commit a068c194df
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=102607
3 changed files with 369 additions and 0 deletions
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16
usr.sbin/extattr/Makefile Normal file
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# $FreeBSD$
PROG= rmextattr
MAN= rmextattr.8
LINKS+= ${BINDIR}/rmextattr ${BINDIR}/getextattr
LINKS+= ${BINDIR}/rmextattr ${BINDIR}/setextattr
LINKS+= ${BINDIR}/rmextattr ${BINDIR}/lsextattr
MLINKS+= rmextattr.8 setextattr.8
MLINKS+= rmextattr.8 getextattr.8
MLINKS+= rmextattr.8 lsextattr.8
WARNS?= 5
.include <bsd.prog.mk>

115
usr.sbin/extattr/rmextattr.8 Normal file
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.\"-
.\" Copyright (c) 2000, 2001 Robert N. M. Watson
.\" Copyright (c) 2002 Networks Associates Technology, Inc.
.\" All rights reserved.
.\"
.\" This software was developed for the FreeBSD Project by Poul-Henning
.\" Kamp and Network Associates Laboratories, the Security Research Division
.\" of Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
.\" ("CBOSS"), as part of the DARPA CHATS research program
.\"
.\" 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.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
.\"
.\" $FreeBSD$
.\"
.Dd August 30, 2000
.Dt RMEXTATTR 8
.Os
.Sh NAME
.Nm getextattr ,
.Nm lsextattr ,
.Nm rmextattr ,
.Nm setextattr
.Nd manipulated extended attributes
.Sh SYNOPSIS
.Nm getextattr
.Op Fl fqsx
.Ar attrnamespace
.Ar attrname
.Ar filename ...
.Nm lsextattr
.Op Fl fq
.Ar attrnamespace
.Ar filename ...
.Nm rmextattr
.Op Fl fq
.Ar attrnamespace
.Ar attrname
.Ar filename ...
.Nm setextattr
.Op Fl fq
.Ar attrnamespace
.Ar attrname
.Ar attrvalue
.Ar filename ...
.Sh DESCRIPTION
These
utilities
are user tools to manipulated a named extended attributes on files and
directories.
The
.Ar attrnamespace
argument should be the namespace of the attribute to retrieve: legal
values are "user" and "system".
The
.Ar attrname
argument should be the name of the attribute,
.Ar filename
the name of the target file or directory,
.Ar attrvalue
a string to store in the attribute.
.Pp
The following options are available:
.Bl -tag -width flag
.It Fl -f
(Force) Ignore errors on individual filenames and continue with
the remaining arguments.
.It Fl -q
(Quiet) Do not print out the pathname and suppress error messages.
.It Fl -s
(Stringify) Escape nonprinting characters and put quotes around the output.
.It Fl -x
(Hex) Print the output in hexadecimal.
.El
.Sh EXAMPLES
.Dl # setextattr system md5 `md5 -q /boot/kernel/kernel` /boot/kernel/kernel
.Dl # getextattr system md5 /boot/kernel/kernel
.Dl # lsextattr system /boot/kernel/kernel
.Dl # rmextattr system md5 /boot/kernel/kernel
.Sh SEE ALSO
.Xr extattr 2 ,
.Xr extattr 3 ,
.Xr extattrctl 8 ,
.Xr extattr 9
.Sh HISTORY
Extended attribute support was developed as part of the TrustedBSD Project,
and introduced in
.Fx 5.0 .
It was developed to support security extensions requiring additional labels
to be associated with each file or directory.
.Sh AUTHORS
Robert N M Watson and
Poul-Henning Kamp
.Sh BUGS
The
.Nm setextattr
utility can only be used to set attributes to strings.

238
usr.sbin/extattr/rmextattr.c Normal file
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/*-
* Copyright (c) 2002 Networks Associates Technology, Inc.
* Copyright (c) 2002 Poul-Henning Kamp.
* Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson
* All rights reserved.
*
* This software was developed for the FreeBSD Project by Poul-Henning
* Kamp and Network Associates Laboratories, the Security Research Division
* of Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
* ("CBOSS"), as part of the DARPA CHATS research program
*
* 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. The names of the authors may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $FreeBSD$
*/
#include <sys/types.h>
#include <sys/uio.h>
#include <sys/extattr.h>
#include <libutil.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <vis.h>
#include <err.h>
#include <errno.h>
static enum { EADUNNO, EAGET, EASET, EARM, EALS } what = EADUNNO;
static void __dead2
usage(void)
{
switch (what) {
case EAGET:
fprintf(stderr, "usage: getextattr [-fqsx] attrnamespace");
fprintf(stderr, " attrname filename ...\n");
exit(-1);
case EASET:
fprintf(stderr, "usage: setextattr [-fq] attrnamespace");
fprintf(stderr, " attrname attrvalue filename ...\n");
exit(-1);
case EARM:
fprintf(stderr, "usage: rmextattr [-fq] attrnamespace");
fprintf(stderr, " attrname filename ...\n");
exit(-1);
case EALS:
fprintf(stderr, "usage: lsextattr [-fq] attrnamespace");
fprintf(stderr, " filename ...\n");
exit(-1);
case EADUNNO:
default:
fprintf(stderr, "usage: (getextattr|lsextattr|rmextattr");
fprintf(stderr, "|setextattr)\n");
exit (-1);
}
}
static void
mkbuf(char **buf, int *oldlen, int newlen)
{
if (*oldlen >= newlen)
return;
if (*buf != NULL)
free(*buf);
*buf = malloc(newlen);
if (*buf == NULL)
err(1, "malloc");
*oldlen = newlen;
return;
}
int
main(int argc, char *argv[])
{
char *buf, *visbuf, *p;
const char *options, *attrname;
int buflen, visbuflen, ch, error, i, arg_counter, attrnamespace;
int flag_force = 0;
int flag_quiet = 0;
int flag_string = 0;
int flag_hex = 0;
visbuflen = buflen = 0;
visbuf = buf = NULL;
p = strrchr(argv[0], '/');
if (p == NULL)
p = argv[0];
if (!strcmp(p, "getextattr")) {
what = EAGET;
options = "fqsx";
} else if (!strcmp(p, "setextattr")) {
what = EASET;
options = "fq";
} else if (!strcmp(p, "rmextattr")) {
what = EARM;
options = "fq";
} else if (!strcmp(p, "lsextattr")) {
what = EALS;
options = "fq";
} else {
usage();
}
while ((ch = getopt(argc, argv, options)) != -1) {
switch (ch) {
case 'f':
flag_force = 1;
break;
case 'q':
flag_quiet = 1;
break;
case 's':
flag_string = 1;
break;
case 'x':
flag_hex = 1;
break;
case '?':
default:
usage();
}
}
argc -= optind;
argv += optind;
if (argc < 2)
usage();
error = extattr_string_to_namespace(argv[0], &attrnamespace);
if (error)
err(-1, argv[0]);
argc--; argv++;
if (what == EALS) {
attrname = "";
} else {
attrname = argv[0];
argc--; argv++;
}
if (what == EASET) {
mkbuf(&buf, &buflen, strlen(argv[0]) + 1);
strcpy(buf, argv[0]);
argc--; argv++;
}
for (arg_counter = 0; arg_counter < argc; arg_counter++) {
switch (what) {
case EARM:
error = extattr_delete_file(argv[arg_counter],
attrnamespace, attrname);
if (error >= 0)
continue;
break;
case EASET:
error = extattr_set_file(argv[arg_counter],
attrnamespace, attrname, buf, strlen(buf));
if (error >= 0)
continue;
break;
case EALS:
case EAGET:
error = extattr_get_file(argv[arg_counter],
attrnamespace, attrname, NULL, 0);
if (error < 0)
break;
mkbuf(&buf, &buflen, error);
error = extattr_get_file(argv[arg_counter],
attrnamespace, attrname, buf, buflen);
if (error < 0)
break;
if (!flag_quiet)
printf("%s\t", argv[arg_counter]);
if (what == EALS) {
for (i = 0; i < error; i += buf[i] + 1)
printf("%s%*.*s", i ? "\t" : "",
buf[i], buf[i], buf + i + 1);
printf("\n");
continue;
}
if (flag_string) {
mkbuf(&visbuf, &visbuflen, error * 4 + 1);
strvisx(visbuf, buf, error,
VIS_SAFE | VIS_WHITE);
printf("\"%s\"\n", visbuf);
continue;
} else if (flag_hex) {
for (i = 0; i < error; i++)
printf("%s%02x", i ? " " : "",
buf[i]);
printf("\n");
continue;
} else {
fwrite(buf, buflen, 1, stdout);
printf("\n");
continue;
}
default:
break;
}
if (!flag_quiet)
warn("%s: failed", argv[arg_counter]);
if (flag_force)
continue;
return(1);
}
return (0);
}