diff options
Diffstat (limited to 'bin/dd/args.c')
| -rw-r--r-- | bin/dd/args.c | 504 |
1 files changed, 504 insertions, 0 deletions
diff --git a/bin/dd/args.c b/bin/dd/args.c new file mode 100644 index 0000000..748f52c --- /dev/null +++ b/bin/dd/args.c @@ -0,0 +1,504 @@ +/* $NetBSD: args.c,v 1.40 2019/01/30 01:40:02 mrg Exp $ */ + +/*- + * Copyright (c) 1991, 1993, 1994 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Keith Muller of the University of California, San Diego and Lance + * Visser of Convex Computer Corporation. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +#ifndef lint +#if 0 +static char sccsid[] = "@(#)args.c 8.3 (Berkeley) 4/2/94"; +#else +__RCSID("$NetBSD: args.c,v 1.40 2019/01/30 01:40:02 mrg Exp $"); +#endif +#endif /* not lint */ + +#include <sys/types.h> +#include <sys/time.h> + +#ifndef NO_IOFLAG +#include <fcntl.h> +#endif /* NO_IOFLAG */ +#include <err.h> +#include <errno.h> +#include <limits.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "dd.h" +#include "extern.h" + +static int c_arg(const void *, const void *); + +#ifdef NO_MSGFMT +static void f_msgfmt(char *) __dead; +#else +static void f_msgfmt(char *); +#endif /* NO_MSGFMT */ + +#ifdef NO_CONV +static void f_conv(char *) __dead; +#else +static void f_conv(char *); +static int c_conv(const void *, const void *); +#endif /* NO_CONV */ + +#ifdef NO_IOFLAG +static void f_iflag(char *) __dead; +static void f_oflag(char *) __dead; +#else +static void f_iflag(char *); +static void f_oflag(char *); +static u_int f_ioflag(char *, u_int); +static int c_ioflag(const void *, const void *); +#endif /* NO_IOFLAG */ + +static void f_bs(char *); +static void f_cbs(char *); +static void f_count(char *); +static void f_files(char *); +static void f_ibs(char *); +static void f_if(char *); +static void f_obs(char *); +static void f_of(char *); +static void f_seek(char *); +static void f_skip(char *); +static void f_progress(char *); + +static const struct arg { + const char *name; + void (*f)(char *); + u_int set, noset; +} args[] = { + /* the array needs to be sorted by the first column so + bsearch() can be used to find commands quickly */ + { "bs", f_bs, C_BS, C_BS|C_IBS|C_OBS|C_OSYNC }, + { "cbs", f_cbs, C_CBS, C_CBS }, + { "conv", f_conv, 0, 0 }, + { "count", f_count, C_COUNT, C_COUNT }, + { "files", f_files, C_FILES, C_FILES }, + { "ibs", f_ibs, C_IBS, C_BS|C_IBS }, + { "if", f_if, C_IF, C_IF }, + { "iflag", f_iflag, C_IFLAG, C_IFLAG }, + { "iseek", f_skip, C_SKIP, C_SKIP }, + { "msgfmt", f_msgfmt, 0, 0 }, + { "obs", f_obs, C_OBS, C_BS|C_OBS }, + { "of", f_of, C_OF, C_OF }, + { "oflag", f_oflag, C_OFLAG, C_OFLAG }, + { "oseek", f_seek, C_SEEK, C_SEEK }, + { "progress", f_progress, 0, 0 }, + { "seek", f_seek, C_SEEK, C_SEEK }, + { "skip", f_skip, C_SKIP, C_SKIP }, +}; + +/* + * args -- parse JCL syntax of dd. + */ +void +jcl(char **argv) +{ + struct arg *ap, tmp; + char *oper, *arg; + + in.dbsz = out.dbsz = 512; + + while ((oper = *++argv) != NULL) { + if ((oper = strdup(oper)) == NULL) { + errx(EXIT_FAILURE, + "unable to allocate space for the argument %s", + *argv); + /* NOTREACHED */ + } + if ((arg = strchr(oper, '=')) == NULL) { + errx(EXIT_FAILURE, "unknown operand %s", oper); + /* NOTREACHED */ + } + *arg++ = '\0'; + if (!*arg) { + errx(EXIT_FAILURE, "no value specified for %s", oper); + /* NOTREACHED */ + } + tmp.name = oper; + if (!(ap = bsearch(&tmp, args, + __arraycount(args), sizeof(*args), c_arg))) { + errx(EXIT_FAILURE, "unknown operand %s", tmp.name); + /* NOTREACHED */ + } + if (ddflags & ap->noset) { + errx(EXIT_FAILURE, + "%s: illegal argument combination or already set", + tmp.name); + /* NOTREACHED */ + } + ddflags |= ap->set; + ap->f(arg); + } + + /* Final sanity checks. */ + + if (ddflags & C_BS) { + /* + * Bs is turned off by any conversion -- we assume the user + * just wanted to set both the input and output block sizes + * and didn't want the bs semantics, so we don't warn. + */ + if (ddflags & (C_BLOCK | C_LCASE | C_SWAB | C_UCASE | + C_UNBLOCK | C_OSYNC | C_ASCII | C_EBCDIC | C_SPARSE)) { + ddflags &= ~C_BS; + ddflags |= C_IBS|C_OBS; + } + + /* Bs supersedes ibs and obs. */ + if (ddflags & C_BS && ddflags & (C_IBS|C_OBS)) + warnx("bs supersedes ibs and obs"); + } + + /* + * Ascii/ebcdic and cbs implies block/unblock. + * Block/unblock requires cbs and vice-versa. + */ + if (ddflags & (C_BLOCK|C_UNBLOCK)) { + if (!(ddflags & C_CBS)) { + errx(EXIT_FAILURE, "record operations require cbs"); + /* NOTREACHED */ + } + cfunc = ddflags & C_BLOCK ? block : unblock; + } else if (ddflags & C_CBS) { + if (ddflags & (C_ASCII|C_EBCDIC)) { + if (ddflags & C_ASCII) { + ddflags |= C_UNBLOCK; + cfunc = unblock; + } else { + ddflags |= C_BLOCK; + cfunc = block; + } + } else { + errx(EXIT_FAILURE, + "cbs meaningless if not doing record operations"); + /* NOTREACHED */ + } + } else + cfunc = def; + + /* Read, write and seek calls take off_t as arguments. + * + * The following check is not done because an off_t is a quad + * for current NetBSD implementations. + * + * if (in.offset > INT_MAX/in.dbsz || out.offset > INT_MAX/out.dbsz) + * errx(1, "seek offsets cannot be larger than %d", INT_MAX); + */ +} + +static int +c_arg(const void *a, const void *b) +{ + + return (strcmp(((const struct arg *)a)->name, + ((const struct arg *)b)->name)); +} + +static void +f_bs(char *arg) +{ + + in.dbsz = out.dbsz = strsuftoll("block size", arg, 1, UINT_MAX); +} + +static void +f_cbs(char *arg) +{ + + cbsz = strsuftoll("conversion record size", arg, 1, UINT_MAX); +} + +static void +f_count(char *arg) +{ + + cpy_cnt = strsuftoll("block count", arg, 0, LLONG_MAX); + if (!cpy_cnt) + terminate(0); +} + +static void +f_files(char *arg) +{ + + files_cnt = (u_int)strsuftoll("file count", arg, 0, UINT_MAX); + if (!files_cnt) + terminate(0); +} + +static void +f_ibs(char *arg) +{ + + if (!(ddflags & C_BS)) + in.dbsz = strsuftoll("input block size", arg, 1, UINT_MAX); +} + +static void +f_if(char *arg) +{ + + in.name = arg; +} + +#ifdef NO_MSGFMT +/* Build a small version (i.e. for a ramdisk root) */ +static void +f_msgfmt(char *arg) +{ + + errx(EXIT_FAILURE, "msgfmt option disabled"); + /* NOTREACHED */ +} +#else /* NO_MSGFMT */ +static void +f_msgfmt(char *arg) +{ + + /* + * If the format string is not valid, dd_write_msg() will print + * an error and exit. + */ + dd_write_msg(arg, 0); + + msgfmt = arg; +} +#endif /* NO_MSGFMT */ + +static void +f_obs(char *arg) +{ + + if (!(ddflags & C_BS)) + out.dbsz = strsuftoll("output block size", arg, 1, UINT_MAX); +} + +static void +f_of(char *arg) +{ + + out.name = arg; +} + +static void +f_seek(char *arg) +{ + + out.offset = strsuftoll("seek blocks", arg, 0, LLONG_MAX); +} + +static void +f_skip(char *arg) +{ + + in.offset = strsuftoll("skip blocks", arg, 0, LLONG_MAX); +} + +static void +f_progress(char *arg) +{ + + progress = strsuftoll("progress blocks", arg, 0, LLONG_MAX); +} + +#ifdef NO_CONV +/* Build a small version (i.e. for a ramdisk root) */ +static void +f_conv(char *arg) +{ + + errx(EXIT_FAILURE, "conv option disabled"); + /* NOTREACHED */ +} +#else /* NO_CONV */ + +static const struct conv { + const char *name; + u_int set, noset; + const u_char *ctab; +} clist[] = { + { "ascii", C_ASCII, C_EBCDIC, e2a_POSIX }, + { "block", C_BLOCK, C_UNBLOCK, NULL }, + { "ebcdic", C_EBCDIC, C_ASCII, a2e_POSIX }, + { "ibm", C_EBCDIC, C_ASCII, a2ibm_POSIX }, + { "lcase", C_LCASE, C_UCASE, NULL }, + { "noerror", C_NOERROR, 0, NULL }, + { "notrunc", C_NOTRUNC, 0, NULL }, + { "oldascii", C_ASCII, C_EBCDIC, e2a_32V }, + { "oldebcdic", C_EBCDIC, C_ASCII, a2e_32V }, + { "oldibm", C_EBCDIC, C_ASCII, a2ibm_32V }, + { "osync", C_OSYNC, C_BS, NULL }, + { "sparse", C_SPARSE, 0, NULL }, + { "swab", C_SWAB, 0, NULL }, + { "sync", C_SYNC, 0, NULL }, + { "ucase", C_UCASE, C_LCASE, NULL }, + { "unblock", C_UNBLOCK, C_BLOCK, NULL }, + /* If you add items to this table, be sure to add the + * conversions to the C_BS check in the jcl routine above. + */ +}; + +static void +f_conv(char *arg) +{ + struct conv *cp, tmp; + + while (arg != NULL) { + tmp.name = strsep(&arg, ","); + if (!(cp = bsearch(&tmp, clist, + __arraycount(clist), sizeof(*clist), c_conv))) { + errx(EXIT_FAILURE, "unknown conversion %s", tmp.name); + /* NOTREACHED */ + } + if (ddflags & cp->noset) { + errx(EXIT_FAILURE, + "%s: illegal conversion combination", tmp.name); + /* NOTREACHED */ + } + ddflags |= cp->set; + if (cp->ctab) + ctab = cp->ctab; + } +} + +static int +c_conv(const void *a, const void *b) +{ + + return (strcmp(((const struct conv *)a)->name, + ((const struct conv *)b)->name)); +} + +#endif /* NO_CONV */ + +static void +f_iflag(char *arg) +{ +/* Build a small version (i.e. for a ramdisk root) */ +#ifdef NO_IOFLAG + errx(EXIT_FAILURE, "iflag option disabled"); + /* NOTREACHED */ +#else + iflag = f_ioflag(arg, C_IFLAG); + return; +#endif +} + +static void +f_oflag(char *arg) +{ +/* Build a small version (i.e. for a ramdisk root) */ +#ifdef NO_IOFLAG + errx(EXIT_FAILURE, "oflag option disabled"); + /* NOTREACHED */ +#else + oflag = f_ioflag(arg, C_OFLAG); + return; +#endif +} + +#ifndef NO_IOFLAG +static const struct ioflag { + const char *name; + u_int set; + u_int allowed; +} olist[] = { + /* the array needs to be sorted by the first column so + bsearch() can be used to find commands quickly */ + { "alt_io", O_ALT_IO, C_IFLAG|C_OFLAG }, + { "append", O_APPEND, C_OFLAG }, + { "async", O_ASYNC, C_IFLAG|C_OFLAG }, + { "cloexec", O_CLOEXEC, C_IFLAG|C_OFLAG }, + { "creat", O_CREAT, C_OFLAG }, + { "direct", O_DIRECT, C_IFLAG|C_OFLAG }, + { "directory", O_DIRECTORY, C_NONE }, + { "dsync", O_DSYNC, C_OFLAG }, + { "excl", O_EXCL, C_OFLAG }, + { "exlock", O_EXLOCK, C_IFLAG|C_OFLAG }, + { "noctty", O_NOCTTY, C_IFLAG|C_OFLAG }, + { "nofollow", O_NOFOLLOW, C_IFLAG|C_OFLAG }, + { "nonblock", O_NONBLOCK, C_IFLAG|C_OFLAG }, + { "nosigpipe", O_NOSIGPIPE, C_IFLAG|C_OFLAG }, + { "rdonly", O_RDONLY, C_IFLAG }, + { "rdwr", O_RDWR, C_IFLAG }, + { "rsync", O_RSYNC, C_IFLAG }, + { "shlock", O_SHLOCK, C_IFLAG|C_OFLAG }, + { "sync", O_SYNC, C_IFLAG|C_OFLAG }, + { "trunc", O_TRUNC, C_OFLAG }, + { "wronly", O_WRONLY, C_OFLAG }, +}; + +static u_int +f_ioflag(char *arg, u_int flagtype) +{ + u_int ioflag = 0; + struct ioflag *cp, tmp; + const char *flagstr = (flagtype == C_IFLAG) ? "iflag" : "oflag"; + + while (arg != NULL) { + tmp.name = strsep(&arg, ","); + if (!(cp = bsearch(&tmp, olist, + __arraycount(olist), sizeof(*olist), c_ioflag))) { + errx(EXIT_FAILURE, "unknown %s %s", flagstr, tmp.name); + /* NOTREACHED */ + } + + if ((cp->set & O_ACCMODE) && (flagtype == C_OFLAG)) { + warnx("rdonly, rdwr and wronly are ignored for oflag"); + continue; + } + + if ((cp->allowed & flagtype) == 0) { + warnx("%s set for %s but makes no sense", + cp->name, flagstr); + } + + ioflag |= cp->set; + } + + + return ioflag; +} + +static int +c_ioflag(const void *a, const void *b) +{ + + return (strcmp(((const struct ioflag *)a)->name, + ((const struct ioflag *)b)->name)); +} +#endif /* NO_IOFLAG */ |