8a16b7a18f
Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
512 lines
12 KiB
C
512 lines
12 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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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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#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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#endif
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#endif /* not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <inttypes.h>
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#include <limits.h>
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#include <signal.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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static int c_conv(const void *, const void *);
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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_conv(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_fillchar(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_speed(char *);
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static void f_status(char *);
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static uintmax_t get_num(const char *);
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static off_t get_off_t(const 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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{ "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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{ "fillchar", f_fillchar, C_FILL, C_FILL },
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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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{ "iseek", f_skip, C_SKIP, C_SKIP },
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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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{ "oseek", f_seek, C_SEEK, C_SEEK },
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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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{ "speed", f_speed, 0, 0 },
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{ "status", f_status, C_STATUS,C_STATUS },
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};
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static char *oper;
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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 *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(1, "unable to allocate space for the argument \"%s\"", *argv);
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if ((arg = strchr(oper, '=')) == NULL)
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errx(1, "unknown operand %s", oper);
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*arg++ = '\0';
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if (!*arg)
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errx(1, "no value specified for %s", oper);
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tmp.name = oper;
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if (!(ap = (struct arg *)bsearch(&tmp, args,
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sizeof(args)/sizeof(struct arg), sizeof(struct arg),
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c_arg)))
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errx(1, "unknown operand %s", tmp.name);
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if (ddflags & ap->noset)
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errx(1, "%s: illegal argument combination or already set",
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tmp.name);
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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))
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ddflags &= ~C_BS;
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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(1, "record operations require cbs");
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if (cbsz == 0)
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errx(1, "cbs cannot be zero");
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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(1, "cbs meaningless if not doing record operations");
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} else
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cfunc = def;
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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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uintmax_t res;
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res = get_num(arg);
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if (res < 1 || res > SSIZE_MAX)
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errx(1, "bs must be between 1 and %zd", (ssize_t)SSIZE_MAX);
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in.dbsz = out.dbsz = (size_t)res;
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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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uintmax_t res;
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res = get_num(arg);
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if (res < 1 || res > SSIZE_MAX)
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errx(1, "cbs must be between 1 and %zd", (ssize_t)SSIZE_MAX);
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cbsz = (size_t)res;
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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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uintmax_t res;
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res = get_num(arg);
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if (res == UINTMAX_MAX)
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errc(1, ERANGE, "%s", oper);
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if (res == 0)
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cpy_cnt = UINTMAX_MAX;
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else
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cpy_cnt = res;
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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 = get_num(arg);
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if (files_cnt < 1)
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errx(1, "files must be between 1 and %zu", SIZE_MAX);
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}
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static void
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f_fillchar(char *arg)
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{
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if (strlen(arg) != 1)
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errx(1, "need exactly one fill char");
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fill_char = arg[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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uintmax_t res;
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if (!(ddflags & C_BS)) {
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res = get_num(arg);
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if (res < 1 || res > SSIZE_MAX)
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errx(1, "ibs must be between 1 and %zd",
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(ssize_t)SSIZE_MAX);
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in.dbsz = (size_t)res;
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}
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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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static void
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f_obs(char *arg)
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{
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uintmax_t res;
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if (!(ddflags & C_BS)) {
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res = get_num(arg);
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if (res < 1 || res > SSIZE_MAX)
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errx(1, "obs must be between 1 and %zd",
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(ssize_t)SSIZE_MAX);
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out.dbsz = (size_t)res;
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}
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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 = get_off_t(arg);
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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 = get_off_t(arg);
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}
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static void
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f_speed(char *arg)
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{
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speed = get_num(arg);
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}
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static void
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f_status(char *arg)
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{
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if (strcmp(arg, "none") == 0)
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ddflags |= C_NOINFO;
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else if (strcmp(arg, "noxfer") == 0)
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ddflags |= C_NOXFER;
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else
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errx(1, "unknown status %s", arg);
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}
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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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{ "pareven", C_PAREVEN, C_PARODD|C_PARSET|C_PARNONE, NULL},
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{ "parnone", C_PARNONE, C_PARODD|C_PARSET|C_PAREVEN, NULL},
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{ "parodd", C_PARODD, C_PAREVEN|C_PARSET|C_PARNONE, NULL},
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{ "parset", C_PARSET, C_PARODD|C_PAREVEN|C_PARNONE, 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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};
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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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cp = bsearch(&tmp, clist, sizeof(clist) / sizeof(struct conv),
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sizeof(struct conv), c_conv);
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if (cp == NULL)
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errx(1, "unknown conversion %s", tmp.name);
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if (ddflags & cp->noset)
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errx(1, "%s: illegal conversion combination", tmp.name);
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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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static intmax_t
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postfix_to_mult(const char expr)
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{
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intmax_t mult;
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mult = 0;
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switch (expr) {
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case 'B':
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case 'b':
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mult = 512;
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break;
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case 'K':
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case 'k':
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mult = 1 << 10;
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break;
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case 'M':
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case 'm':
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mult = 1 << 20;
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break;
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case 'G':
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case 'g':
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mult = 1 << 30;
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break;
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case 'T':
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case 't':
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mult = (uintmax_t)1 << 40;
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break;
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case 'P':
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case 'p':
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mult = (uintmax_t)1 << 50;
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break;
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case 'W':
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case 'w':
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mult = sizeof(int);
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break;
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}
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return (mult);
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}
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/*
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* Convert an expression of the following forms to a uintmax_t.
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* 1) A positive decimal number.
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* 2) A positive decimal number followed by a 'b' or 'B' (mult by 512).
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* 3) A positive decimal number followed by a 'k' or 'K' (mult by 1 << 10).
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* 4) A positive decimal number followed by a 'm' or 'M' (mult by 1 << 20).
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* 5) A positive decimal number followed by a 'g' or 'G' (mult by 1 << 30).
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* 6) A positive decimal number followed by a 't' or 'T' (mult by 1 << 40).
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* 7) A positive decimal number followed by a 'p' or 'P' (mult by 1 << 50).
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* 8) A positive decimal number followed by a 'w' or 'W' (mult by sizeof int).
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* 9) Two or more positive decimal numbers (with/without [BbKkMmGgWw])
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* separated by 'x' or 'X' (also '*' for backwards compatibility),
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* specifying the product of the indicated values.
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*/
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static uintmax_t
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get_num(const char *val)
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{
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uintmax_t num, mult, prevnum;
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char *expr;
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errno = 0;
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num = strtoumax(val, &expr, 0);
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if (expr == val) /* No valid digits. */
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errx(1, "%s: invalid numeric value", oper);
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if (errno != 0)
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err(1, "%s", oper);
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mult = postfix_to_mult(*expr);
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if (mult != 0) {
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prevnum = num;
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num *= mult;
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/* Check for overflow. */
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if (num / mult != prevnum)
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goto erange;
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expr++;
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}
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switch (*expr) {
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case '\0':
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break;
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case '*': /* Backward compatible. */
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case 'X':
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case 'x':
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mult = get_num(expr + 1);
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prevnum = num;
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num *= mult;
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if (num / mult == prevnum)
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break;
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erange:
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errx(1, "%s: %s", oper, strerror(ERANGE));
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default:
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errx(1, "%s: illegal numeric value", oper);
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}
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return (num);
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}
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/*
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* Convert an expression of the following forms to an off_t. This is the
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* same as get_num(), but it uses signed numbers.
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*
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* The major problem here is that an off_t may not necessarily be a intmax_t.
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*/
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static off_t
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get_off_t(const char *val)
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{
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intmax_t num, mult, prevnum;
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char *expr;
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errno = 0;
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num = strtoimax(val, &expr, 0);
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if (expr == val) /* No valid digits. */
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errx(1, "%s: invalid numeric value", oper);
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if (errno != 0)
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err(1, "%s", oper);
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mult = postfix_to_mult(*expr);
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if (mult != 0) {
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prevnum = num;
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num *= mult;
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/* Check for overflow. */
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if ((prevnum > 0) != (num > 0) || num / mult != prevnum)
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goto erange;
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expr++;
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}
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switch (*expr) {
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case '\0':
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break;
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case '*': /* Backward compatible. */
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case 'X':
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case 'x':
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mult = (intmax_t)get_off_t(expr + 1);
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prevnum = num;
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num *= mult;
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if ((prevnum > 0) == (num > 0) && num / mult == prevnum)
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break;
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erange:
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errx(1, "%s: %s", oper, strerror(ERANGE));
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default:
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errx(1, "%s: illegal numeric value", oper);
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}
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return (num);
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}
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