FreeBSD-5.3/usr.sbin/extattr/rmextattr.c
/*-
* Copyright (c) 2002, 2003 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: src/usr.sbin/extattr/rmextattr.c,v 1.6 2003/06/05 04:30:00 rwatson Exp $
*/
#include <sys/types.h>
#include <sys/uio.h>
#include <sys/extattr.h>
#include <libgen.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 [-fhqsx] attrnamespace");
fprintf(stderr, " attrname filename ...\n");
exit(-1);
case EASET:
fprintf(stderr, "usage: setextattr [-fhnq] attrnamespace");
fprintf(stderr, " attrname attrvalue filename ...\n");
exit(-1);
case EARM:
fprintf(stderr, "usage: rmextattr [-fhq] attrnamespace");
fprintf(stderr, " attrname filename ...\n");
exit(-1);
case EALS:
fprintf(stderr, "usage: lsextattr [-fhq] 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,
minargc;
int flag_force = 0;
int flag_nofollow = 0;
int flag_null = 0;
int flag_quiet = 0;
int flag_string = 0;
int flag_hex = 0;
visbuflen = buflen = 0;
visbuf = buf = NULL;
p = basename(argv[0]);
if (p == NULL)
p = argv[0];
if (!strcmp(p, "getextattr")) {
what = EAGET;
options = "fhqsx";
minargc = 3;
} else if (!strcmp(p, "setextattr")) {
what = EASET;
options = "fhnq";
minargc = 4;
} else if (!strcmp(p, "rmextattr")) {
what = EARM;
options = "fhq";
minargc = 3;
} else if (!strcmp(p, "lsextattr")) {
what = EALS;
options = "fhq";
minargc = 2;
} else {
usage();
}
while ((ch = getopt(argc, argv, options)) != -1) {
switch (ch) {
case 'f':
flag_force = 1;
break;
case 'h':
flag_nofollow = 1;
break;
case 'n':
flag_null = 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 < minargc)
usage();
error = extattr_string_to_namespace(argv[0], &attrnamespace);
if (error)
err(-1, argv[0]);
argc--; argv++;
if (what != EALS) {
attrname = argv[0];
argc--; argv++;
} else
attrname = NULL;
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:
if (flag_nofollow)
error = extattr_delete_link(argv[arg_counter],
attrnamespace, attrname);
else
error = extattr_delete_file(argv[arg_counter],
attrnamespace, attrname);
if (error >= 0)
continue;
break;
case EASET:
if (flag_nofollow)
error = extattr_set_link(argv[arg_counter],
attrnamespace, attrname, buf,
strlen(buf) + flag_null);
else
error = extattr_set_file(argv[arg_counter],
attrnamespace, attrname, buf,
strlen(buf) + flag_null);
if (error >= 0)
continue;
break;
case EALS:
if (flag_nofollow)
error = extattr_list_link(argv[arg_counter],
attrnamespace, NULL, 0);
else
error = extattr_list_file(argv[arg_counter],
attrnamespace, NULL, 0);
if (error < 0)
break;
mkbuf(&buf, &buflen, error);
if (flag_nofollow)
error = extattr_list_link(argv[arg_counter],
attrnamespace, buf, buflen);
else
error = extattr_list_file(argv[arg_counter],
attrnamespace, buf, buflen);
if (error < 0)
break;
if (!flag_quiet)
printf("%s\t", argv[arg_counter]);
for (i = 0; i < error; i += buf[i] + 1)
printf("%s%*.*s", i ? "\t" : "",
buf[i], buf[i], buf + i + 1);
printf("\n");
continue;
case EAGET:
if (flag_nofollow)
error = extattr_get_link(argv[arg_counter],
attrnamespace, attrname, NULL, 0);
else
error = extattr_get_file(argv[arg_counter],
attrnamespace, attrname, NULL, 0);
if (error < 0)
break;
mkbuf(&buf, &buflen, error);
if (flag_nofollow)
error = extattr_get_link(argv[arg_counter],
attrnamespace, attrname, buf, buflen);
else
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 (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);
}