424 lines
10 KiB
C
424 lines
10 KiB
C
/* $NetBSD: getextattr.c,v 1.10 2012/06/17 08:09:29 manu Exp $ */
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/*-
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* Copyright (c) 2002, 2003 Networks Associates Technology, Inc.
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* Copyright (c) 2002 Poul-Henning Kamp.
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* Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson
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* All rights reserved.
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*
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* This software was developed for the FreeBSD Project by Poul-Henning
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* Kamp and Network Associates Laboratories, the Security Research Division
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* of Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
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* ("CBOSS"), as part of the DARPA CHATS research program
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The names of the authors may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* FreeBSD: src/usr.sbin/extattr/rmextattr.c,v 1.6 2003/06/05 04:30:00 rwatson Exp
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*/
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#include <sys/types.h>
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#include <sys/uio.h>
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#include <sys/extattr.h>
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#include <err.h>
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#include <errno.h>
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//#include <libgen.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <vis.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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//#include <util.h>
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static enum { EADUNNO, EAGET, EASET, EARM, EALS } what = EADUNNO;
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__dead static void
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usage(void)
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{
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switch (what) {
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case EAGET:
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fprintf(stderr, "usage: %s [-fhq] [-s | -x | -v style] "
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"attrnamespace attrname filename ...\n", getprogname());
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exit(1);
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case EASET:
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fprintf(stderr, "usage: %s [-fhnq] "
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"attrnamespace attrname attrvalue filename ...\n",
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getprogname());
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fprintf(stderr, "usage: %s [-fhnq] -i attrvalue_file "
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"attrnamespace attrname filename ...\n",
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getprogname());
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exit(1);
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case EARM:
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fprintf(stderr, "usage: %s [-fhq] "
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"attrnamespace attrname filename ...\n", getprogname());
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exit(1);
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case EALS:
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fprintf(stderr, "usage: %s [-fhq] "
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"attrnamespace filename ...\n", getprogname());
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exit(1);
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case EADUNNO:
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default:
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fprintf(stderr,
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"usage: (getextattr|lsextattr|rmextattr|setextattr)\n");
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exit (1);
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}
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}
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static void
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mkbuf(char **buf, int *oldlen, int newlen)
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{
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if (*oldlen >= newlen)
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return;
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if (*buf != NULL)
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free(*buf);
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*buf = malloc(newlen);
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if (*buf == NULL)
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err(1, "malloc");
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*oldlen = newlen;
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return;
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}
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static int
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parse_flag_vis(const char *opt)
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{
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if (strcmp(opt, "default") == 0)
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return 0;
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else if (strcmp(opt, "cstyle") == 0)
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return VIS_CSTYLE;
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else if (strcmp(opt, "octal") == 0)
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return VIS_OCTAL;
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else if (strcmp(opt, "httpstyle") == 0)
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return VIS_HTTPSTYLE;
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/* Convenient aliases */
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else if (strcmp(opt, "vis") == 0)
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return 0;
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else if (strcmp(opt, "c") == 0)
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return VIS_CSTYLE;
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else if (strcmp(opt, "http") == 0)
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return VIS_HTTPSTYLE;
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else
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fprintf(stderr, "%s: invalid -s option \"%s\"",
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getprogname(), opt);
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return -1;
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}
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#define HEXDUMP_PRINT(x) ((uint8_t)x >= 32 && (uint8_t)x < 128) ? x : '.'
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static void
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hexdump(const char *addr, size_t len)
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{
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unsigned int i, j;
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for (i = 0; i < len; i += 16) {
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printf(" %03x ", i);
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for (j = 0; j < 16; j++) {
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if (i + j >= len)
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printf(" ");
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else
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printf("%02x ", addr[i + j] & 0xff);
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}
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printf(" ");
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for (j = 0; j < 16; j++) {
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if (i + j >= len)
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printf(" ");
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else
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printf("%c", HEXDUMP_PRINT(addr[i + j]));
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}
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printf("\n");
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}
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}
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#undef HEXDUMP_PRINT
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int
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main(int argc, char *argv[])
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{
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char *buf, *visbuf;
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const char *p;
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const char *options, *attrname;
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int buflen, visbuflen, ch, error, i, arg_counter, attrnamespace,
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minargc, val_len = 0;
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int flag_force = 0;
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int flag_nofollow = 0;
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int flag_null = 0;
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int flag_quiet = 0;
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int flag_vis = -1;
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int flag_hex = 0;
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char *filename = NULL;
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options = NULL;
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minargc = 0;
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visbuflen = buflen = 0;
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visbuf = buf = NULL;
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p = getprogname();
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if (strcmp(p, "getextattr") == 0) {
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what = EAGET;
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options = "fhqsxv:";
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minargc = 2;
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} else if (strcmp(p, "setextattr") == 0) {
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what = EASET;
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options = "fhnqi:";
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minargc = 3;
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} else if (strcmp(p, "rmextattr") == 0) {
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what = EARM;
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options = "fhq";
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minargc = 2;
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} else if (strcmp(p, "lsextattr") == 0) {
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what = EALS;
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options = "fhq";
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minargc = 2;
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} else
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usage();
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while ((ch = getopt(argc, argv, options)) != -1) {
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switch (ch) {
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case 'f':
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flag_force = 1;
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break;
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case 'h':
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flag_nofollow = 1;
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break;
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case 'n':
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flag_null = 1;
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break;
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case 'q':
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flag_quiet = 1;
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break;
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case 's':
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flag_vis = VIS_SAFE | VIS_WHITE;
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break;
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case 'v':
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flag_vis = parse_flag_vis(optarg);
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break;
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case 'x':
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flag_hex = 1;
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break;
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case 'i':
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filename = optarg;
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minargc--;
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break;
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default:
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usage();
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}
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}
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argc -= optind;
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argv += optind;
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/*
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* Check for missing argument.
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*/
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if (argc < minargc)
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usage();
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/*
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* Normal case "namespace attribute".
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*/
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error = extattr_string_to_namespace(argv[0], &attrnamespace);
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if (error == 0) {
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/*
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* Namespace was specified, so we need one more argument
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* for the attribute (except for listing)
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*/
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if ((what != EALS) && (argc < minargc + 1))
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usage();
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argc--; argv++;
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} else {
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/*
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* The namespace was not valid. Perhaps it was omited.
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* Try to guess a missing namespace by using
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* linux layout "namespace.attribute". While
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* we are here, also test the Linux namespaces.
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*/
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if (strstr(argv[0], "user.") == argv[0]) {
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attrnamespace = EXTATTR_NAMESPACE_USER;
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} else
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if ((strstr(argv[0], "system.") == argv[0]) ||
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(strstr(argv[0], "trusted.") == argv[0]) ||
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(strstr(argv[0], "security.") == argv[0])) {
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attrnamespace = EXTATTR_NAMESPACE_SYSTEM;
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} else {
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err(1, "%s", argv[0]);
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}
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}
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if (what != EALS) {
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attrname = argv[0];
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argc--; argv++;
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} else
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attrname = NULL;
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if (what == EASET) {
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/*
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* Handle -i option, reading value from a file.
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*/
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if (filename != NULL) {
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int fd;
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struct stat st;
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ssize_t readen, remain;
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if ((fd = open(filename, O_RDONLY, 0)) == -1)
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err(1, "%s: cannot open \"%s\"",
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getprogname(), filename);
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if (fstat(fd, &st) != 0)
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err(1, "%s: cannot stat \"%s\"",
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getprogname(), filename);
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val_len = st.st_size;
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mkbuf(&buf, &buflen, val_len);
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for (remain = val_len; remain > 0; remain -= readen) {
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if ((readen = read(fd, buf, remain)) == -1)
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err(1, "%s: cannot read \"%s\"",
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getprogname(), filename);
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}
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(void)close(fd);
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} else {
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val_len = strlen(argv[0]) + 1;
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mkbuf(&buf, &buflen, val_len);
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strcpy(buf, argv[0]); /* safe */
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argc--; argv++;
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}
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}
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for (arg_counter = 0; arg_counter < argc; arg_counter++) {
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switch (what) {
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case EARM:
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if (flag_nofollow)
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error = extattr_delete_link(argv[arg_counter],
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attrnamespace, attrname);
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else
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error = extattr_delete_file(argv[arg_counter],
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attrnamespace, attrname);
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if (error >= 0)
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continue;
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break;
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case EASET:
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if (flag_nofollow)
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error = extattr_set_link(argv[arg_counter],
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attrnamespace, attrname, buf,
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val_len + flag_null);
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else
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error = extattr_set_file(argv[arg_counter],
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attrnamespace, attrname, buf,
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val_len + flag_null);
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if (error >= 0)
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continue;
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break;
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case EALS:
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if (flag_nofollow)
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error = extattr_list_link(argv[arg_counter],
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attrnamespace, NULL, 0);
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else
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error = extattr_list_file(argv[arg_counter],
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attrnamespace, NULL, 0);
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if (error < 0)
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break;
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mkbuf(&buf, &buflen, error);
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if (flag_nofollow)
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error = extattr_list_link(argv[arg_counter],
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attrnamespace, buf, buflen);
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else
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error = extattr_list_file(argv[arg_counter],
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attrnamespace, buf, buflen);
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if (error < 0)
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break;
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if (!flag_quiet)
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printf("%s\t", argv[arg_counter]);
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for (i = 0; i < error; i += buf[i] + 1)
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printf("%s%*.*s", i ? "\t" : "",
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buf[i], buf[i], buf + i + 1);
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printf("\n");
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continue;
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case EAGET:
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if (flag_nofollow)
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error = extattr_get_link(argv[arg_counter],
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attrnamespace, attrname, NULL, 0);
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else
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error = extattr_get_file(argv[arg_counter],
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attrnamespace, attrname, NULL, 0);
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if (error < 0)
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break;
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mkbuf(&buf, &buflen, error);
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if (flag_nofollow)
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error = extattr_get_link(argv[arg_counter],
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attrnamespace, attrname, buf, buflen);
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else
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error = extattr_get_file(argv[arg_counter],
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attrnamespace, attrname, buf, buflen);
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if (error < 0)
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break;
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if (!flag_quiet)
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printf("%s\t", argv[arg_counter]);
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/*
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* Check for binary string and terminal output
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*/
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#if 0
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for (i = 0; i < error; i++)
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if (!isprint((int)buf[i]))
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err(1, "binary data, use -x flag");
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#endif
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if (flag_vis != -1) {
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mkbuf(&visbuf, &visbuflen, error * 4 + 1);
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strvisx(visbuf, buf, error, flag_vis);
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printf("\"%s\"\n", visbuf);
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continue;
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} else if (flag_hex) {
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printf("\n");
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hexdump(buf, error);
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continue;
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} else {
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fwrite(buf, buflen, 1, stdout);
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printf("\n");
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continue;
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}
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default:
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break;
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}
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if (!flag_quiet)
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warn("%s: failed", argv[arg_counter]);
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if (flag_force)
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continue;
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return(1);
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}
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return (0);
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}
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