506 lines
12 KiB
C
506 lines
12 KiB
C
/* $NetBSD: args.c,v 1.39 2015/03/18 13:23:49 manu Exp $ */
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/*-
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* Copyright (c) 1991, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Keith Muller of the University of California, San Diego and Lance
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* Visser of Convex Computer Corporation.
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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. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)args.c 8.3 (Berkeley) 4/2/94";
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#else
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__RCSID("$NetBSD: args.c,v 1.39 2015/03/18 13:23:49 manu Exp $");
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#endif
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/time.h>
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#ifndef NO_IOFLAG
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#include <fcntl.h>
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#endif /* NO_IOFLAG */
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#include <err.h>
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#include <errno.h>
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#include <limits.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 "dd.h"
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#include "extern.h"
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static int c_arg(const void *, const void *);
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#ifdef NO_MSGFMT
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static void f_msgfmt(char *) __dead;
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#else
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static void f_msgfmt(char *);
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#endif /* NO_MSGFMT */
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#ifdef NO_CONV
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static void f_conv(char *) __dead;
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#else
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static void f_conv(char *);
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static int c_conv(const void *, const void *);
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#endif /* NO_CONV */
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#ifdef NO_IOFLAG
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static void f_iflag(char *) __dead;
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static void f_oflag(char *) __dead;
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#else
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static void f_iflag(char *);
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static void f_oflag(char *);
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static u_int f_ioflag(char *, u_int);
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static int c_ioflag(const void *, const void *);
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#endif /* NO_IOFLAG */
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static void f_bs(char *);
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static void f_cbs(char *);
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static void f_count(char *);
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static void f_files(char *);
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static void f_ibs(char *);
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static void f_if(char *);
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static void f_obs(char *);
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static void f_of(char *);
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static void f_seek(char *);
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static void f_skip(char *);
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static void f_progress(char *);
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static const struct arg {
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const char *name;
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void (*f)(char *);
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u_int set, noset;
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} args[] = {
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/* the array needs to be sorted by the first column so
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bsearch() can be used to find commands quickly */
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{ "bs", f_bs, C_BS, C_BS|C_IBS|C_OBS|C_OSYNC },
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{ "cbs", f_cbs, C_CBS, C_CBS },
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{ "conv", f_conv, 0, 0 },
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{ "count", f_count, C_COUNT, C_COUNT },
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{ "files", f_files, C_FILES, C_FILES },
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{ "ibs", f_ibs, C_IBS, C_BS|C_IBS },
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{ "if", f_if, C_IF, C_IF },
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{ "iflag", f_iflag, C_IFLAG, C_IFLAG },
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{ "iseek", f_skip, C_SKIP, C_SKIP },
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{ "msgfmt", f_msgfmt, 0, 0 },
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{ "obs", f_obs, C_OBS, C_BS|C_OBS },
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{ "of", f_of, C_OF, C_OF },
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{ "oflag", f_oflag, C_OFLAG, C_OFLAG },
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{ "oseek", f_seek, C_SEEK, C_SEEK },
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{ "progress", f_progress, 0, 0 },
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{ "seek", f_seek, C_SEEK, C_SEEK },
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{ "skip", f_skip, C_SKIP, C_SKIP },
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};
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/*
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* args -- parse JCL syntax of dd.
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*/
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void
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jcl(char **argv)
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{
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struct arg *ap, tmp;
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char *oper, *arg;
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in.dbsz = out.dbsz = 512;
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while ((oper = *++argv) != NULL) {
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if ((oper = strdup(oper)) == NULL) {
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errx(EXIT_FAILURE,
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"unable to allocate space for the argument %s",
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*argv);
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/* NOTREACHED */
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}
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if ((arg = strchr(oper, '=')) == NULL) {
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errx(EXIT_FAILURE, "unknown operand %s", oper);
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/* NOTREACHED */
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}
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*arg++ = '\0';
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if (!*arg) {
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errx(EXIT_FAILURE, "no value specified for %s", oper);
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/* NOTREACHED */
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}
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tmp.name = oper;
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if (!(ap = bsearch(&tmp, args,
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__arraycount(args), sizeof(*args), c_arg))) {
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errx(EXIT_FAILURE, "unknown operand %s", tmp.name);
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/* NOTREACHED */
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}
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if (ddflags & ap->noset) {
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errx(EXIT_FAILURE,
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"%s: illegal argument combination or already set",
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tmp.name);
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/* NOTREACHED */
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}
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ddflags |= ap->set;
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ap->f(arg);
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}
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/* Final sanity checks. */
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if (ddflags & C_BS) {
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/*
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* Bs is turned off by any conversion -- we assume the user
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* just wanted to set both the input and output block sizes
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* and didn't want the bs semantics, so we don't warn.
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*/
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if (ddflags & (C_BLOCK | C_LCASE | C_SWAB | C_UCASE |
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C_UNBLOCK | C_OSYNC | C_ASCII | C_EBCDIC | C_SPARSE)) {
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ddflags &= ~C_BS;
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ddflags |= C_IBS|C_OBS;
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}
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/* Bs supersedes ibs and obs. */
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if (ddflags & C_BS && ddflags & (C_IBS|C_OBS))
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warnx("bs supersedes ibs and obs");
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}
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/*
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* Ascii/ebcdic and cbs implies block/unblock.
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* Block/unblock requires cbs and vice-versa.
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*/
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if (ddflags & (C_BLOCK|C_UNBLOCK)) {
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if (!(ddflags & C_CBS)) {
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errx(EXIT_FAILURE, "record operations require cbs");
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/* NOTREACHED */
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}
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cfunc = ddflags & C_BLOCK ? block : unblock;
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} else if (ddflags & C_CBS) {
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if (ddflags & (C_ASCII|C_EBCDIC)) {
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if (ddflags & C_ASCII) {
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ddflags |= C_UNBLOCK;
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cfunc = unblock;
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} else {
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ddflags |= C_BLOCK;
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cfunc = block;
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}
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} else {
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errx(EXIT_FAILURE,
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"cbs meaningless if not doing record operations");
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/* NOTREACHED */
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}
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} else
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cfunc = def;
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/* Read, write and seek calls take off_t as arguments.
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*
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* The following check is not done because an off_t is a quad
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* for current NetBSD implementations.
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*
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* if (in.offset > INT_MAX/in.dbsz || out.offset > INT_MAX/out.dbsz)
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* errx(1, "seek offsets cannot be larger than %d", INT_MAX);
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*/
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}
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static int
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c_arg(const void *a, const void *b)
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{
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return (strcmp(((const struct arg *)a)->name,
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((const struct arg *)b)->name));
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}
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static void
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f_bs(char *arg)
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{
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in.dbsz = out.dbsz = strsuftoll("block size", arg, 1, UINT_MAX);
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}
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static void
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f_cbs(char *arg)
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{
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cbsz = strsuftoll("conversion record size", arg, 1, UINT_MAX);
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}
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static void
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f_count(char *arg)
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{
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cpy_cnt = strsuftoll("block count", arg, 0, LLONG_MAX);
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if (!cpy_cnt)
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terminate(0);
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}
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static void
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f_files(char *arg)
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{
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files_cnt = (u_int)strsuftoll("file count", arg, 0, UINT_MAX);
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if (!files_cnt)
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terminate(0);
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}
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static void
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f_ibs(char *arg)
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{
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if (!(ddflags & C_BS))
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in.dbsz = strsuftoll("input block size", arg, 1, UINT_MAX);
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}
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static void
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f_if(char *arg)
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{
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in.name = arg;
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}
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#ifdef NO_MSGFMT
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/* Build a small version (i.e. for a ramdisk root) */
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static void
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f_msgfmt(char *arg)
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{
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errx(EXIT_FAILURE, "msgfmt option disabled");
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/* NOTREACHED */
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}
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#else /* NO_MSGFMT */
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static void
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f_msgfmt(char *arg)
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{
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/*
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* If the format string is not valid, dd_write_msg() will print
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* an error and exit.
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*/
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dd_write_msg(arg, 0);
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msgfmt = arg;
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}
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#endif /* NO_MSGFMT */
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static void
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f_obs(char *arg)
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{
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if (!(ddflags & C_BS))
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out.dbsz = strsuftoll("output block size", arg, 1, UINT_MAX);
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}
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static void
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f_of(char *arg)
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{
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out.name = arg;
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}
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static void
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f_seek(char *arg)
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{
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out.offset = strsuftoll("seek blocks", arg, 0, LLONG_MAX);
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}
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static void
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f_skip(char *arg)
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{
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in.offset = strsuftoll("skip blocks", arg, 0, LLONG_MAX);
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}
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static void
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f_progress(char *arg)
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{
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progress = strsuftoll("progress blocks", arg, 0, LLONG_MAX);
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}
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#ifdef NO_CONV
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/* Build a small version (i.e. for a ramdisk root) */
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static void
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f_conv(char *arg)
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{
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errx(EXIT_FAILURE, "conv option disabled");
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/* NOTREACHED */
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}
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#else /* NO_CONV */
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static const struct conv {
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const char *name;
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u_int set, noset;
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const u_char *ctab;
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} clist[] = {
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{ "ascii", C_ASCII, C_EBCDIC, e2a_POSIX },
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{ "block", C_BLOCK, C_UNBLOCK, NULL },
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{ "ebcdic", C_EBCDIC, C_ASCII, a2e_POSIX },
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{ "ibm", C_EBCDIC, C_ASCII, a2ibm_POSIX },
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{ "lcase", C_LCASE, C_UCASE, NULL },
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{ "noerror", C_NOERROR, 0, NULL },
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{ "notrunc", C_NOTRUNC, 0, NULL },
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{ "oldascii", C_ASCII, C_EBCDIC, e2a_32V },
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{ "oldebcdic", C_EBCDIC, C_ASCII, a2e_32V },
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{ "oldibm", C_EBCDIC, C_ASCII, a2ibm_32V },
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{ "osync", C_OSYNC, C_BS, NULL },
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{ "sparse", C_SPARSE, 0, NULL },
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{ "swab", C_SWAB, 0, NULL },
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{ "sync", C_SYNC, 0, NULL },
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{ "ucase", C_UCASE, C_LCASE, NULL },
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{ "unblock", C_UNBLOCK, C_BLOCK, NULL },
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/* If you add items to this table, be sure to add the
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* conversions to the C_BS check in the jcl routine above.
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*/
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};
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static void
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f_conv(char *arg)
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{
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struct conv *cp, tmp;
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while (arg != NULL) {
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tmp.name = strsep(&arg, ",");
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if (!(cp = bsearch(&tmp, clist,
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__arraycount(clist), sizeof(*clist), c_conv))) {
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errx(EXIT_FAILURE, "unknown conversion %s", tmp.name);
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/* NOTREACHED */
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}
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if (ddflags & cp->noset) {
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errx(EXIT_FAILURE,
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"%s: illegal conversion combination", tmp.name);
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/* NOTREACHED */
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}
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ddflags |= cp->set;
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if (cp->ctab)
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ctab = cp->ctab;
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}
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}
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static int
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c_conv(const void *a, const void *b)
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{
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return (strcmp(((const struct conv *)a)->name,
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((const struct conv *)b)->name));
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}
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#endif /* NO_CONV */
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static void
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f_iflag(char *arg)
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{
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/* Build a small version (i.e. for a ramdisk root) */
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#ifdef NO_IOFLAG
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errx(EXIT_FAILURE, "iflag option disabled");
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/* NOTREACHED */
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#else
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iflag = f_ioflag(arg, C_IFLAG);
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return;
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#endif
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}
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static void
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f_oflag(char *arg)
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{
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/* Build a small version (i.e. for a ramdisk root) */
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#ifdef NO_IOFLAG
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errx(EXIT_FAILURE, "oflag option disabled");
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/* NOTREACHED */
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#else
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oflag = f_ioflag(arg, C_OFLAG);
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return;
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#endif
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}
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#ifndef NO_IOFLAG
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static const struct ioflag {
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const char *name;
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u_int set;
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u_int allowed;
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} olist[] = {
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/* the array needs to be sorted by the first column so
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bsearch() can be used to find commands quickly */
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{ "alt_io", O_ALT_IO, C_IFLAG|C_OFLAG },
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{ "append", O_APPEND, C_OFLAG },
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{ "async", O_ASYNC, C_IFLAG|C_OFLAG },
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{ "cloexec", O_CLOEXEC, C_IFLAG|C_OFLAG },
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{ "creat", O_CREAT, C_OFLAG },
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{ "direct", O_DIRECT, C_IFLAG|C_OFLAG },
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{ "directory", O_DIRECTORY, C_NONE },
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{ "dsync", O_DSYNC, C_OFLAG },
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{ "excl", O_EXCL, C_IFLAG|C_OFLAG },
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{ "exlock", O_EXLOCK, C_IFLAG|C_OFLAG },
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{ "noctty", O_NOCTTY, C_IFLAG|C_OFLAG },
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{ "nofollow", O_NOFOLLOW, C_IFLAG|C_OFLAG },
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{ "nonblock", O_NONBLOCK, C_IFLAG|C_OFLAG },
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{ "nosigpipe", O_NOSIGPIPE, C_IFLAG|C_OFLAG },
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{ "rdonly", O_RDONLY, C_IFLAG },
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{ "rdwr", O_RDWR, C_IFLAG },
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{ "rsync", O_RSYNC, C_IFLAG },
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{ "search", O_SEARCH, C_IFLAG|C_OFLAG },
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{ "shlock", O_SHLOCK, C_IFLAG|C_OFLAG },
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{ "sync", O_SYNC, C_IFLAG|C_OFLAG },
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{ "trunc", O_TRUNC, C_IFLAG|C_OFLAG },
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{ "wronly", O_WRONLY, C_NONE },
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};
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static u_int
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f_ioflag(char *arg, u_int flagtype)
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{
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u_int ioflag = 0;
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struct ioflag *cp, tmp;
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const char *flagstr = (flagtype == C_IFLAG) ? "iflag" : "oflag";
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while (arg != NULL) {
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tmp.name = strsep(&arg, ",");
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if (!(cp = bsearch(&tmp, olist,
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__arraycount(olist), sizeof(*olist), c_ioflag))) {
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errx(EXIT_FAILURE, "unknown %s %s", flagstr, tmp.name);
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/* NOTREACHED */
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}
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if ((cp->set & O_ACCMODE) && (flagtype == C_OFLAG)) {
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warnx("rdonly, rdwr and wronly are ignored for oflag");
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continue;
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}
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if ((cp->allowed & flagtype) == 0) {
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warnx("%s set for %s but makes no sense",
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cp->name, flagstr);
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}
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ioflag |= cp->set;
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}
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return ioflag;
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}
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static int
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c_ioflag(const void *a, const void *b)
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{
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return (strcmp(((const struct ioflag *)a)->name,
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((const struct ioflag *)b)->name));
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}
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#endif /* NO_IOFLAG */
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