source: rtems/cpukit/libmisc/shell/dd-args.c @ 0a7278e

4.104.115
Last change on this file since 0a7278e was 0893220, checked in by Ralf Corsepius <ralf.corsepius@…>, on 11/29/09 at 12:12:39

Whitespace removal.
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File size: 13.0 KB
Line 
1/*-
2 * Copyright (c) 1991, 1993, 1994
3 *      The Regents of the University of California.  All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Keith Muller of the University of California, San Diego and Lance
7 * Visser of Convex Computer Corporation.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35#if 0
36static char sccsid[] = "@(#)args.c      8.3 (Berkeley) 4/2/94";
37#endif
38#endif /* not lint */
39#include <sys/cdefs.h>
40__FBSDID("$FreeBSD: src/bin/dd/args.c,v 1.40 2004/08/15 19:10:05 rwatson Exp $");
41
42#include <sys/types.h>
43
44#include <err.h>
45#include <errno.h>
46#include <inttypes.h>
47#include <limits.h>
48#include <stdlib.h>
49#include <string.h>
50
51#include "dd.h"
52#include "extern-dd.h"
53
54#define strtouq strtoul
55#define strtoq strtol
56
57static int      c_arg(const void *, const void *);
58static int      c_conv(const void *, const void *);
59static void     f_bs(rtems_shell_dd_globals* globals, char *);
60static void     f_cbs(rtems_shell_dd_globals* globals, char *);
61static void     f_conv(rtems_shell_dd_globals* globals, char *);
62static void     f_count(rtems_shell_dd_globals* globals, char *);
63static void     f_files(rtems_shell_dd_globals* globals, char *);
64static void     f_fillchar(rtems_shell_dd_globals* globals, char *);
65static void     f_ibs(rtems_shell_dd_globals* globals, char *);
66static void     f_if(rtems_shell_dd_globals* globals, char *);
67static void     f_obs(rtems_shell_dd_globals* globals, char *);
68static void     f_of(rtems_shell_dd_globals* globals, char *);
69static void     f_seek(rtems_shell_dd_globals* globals, char *);
70static void     f_skip(rtems_shell_dd_globals* globals, char *);
71static uintmax_t get_num(rtems_shell_dd_globals* globals, const char *);
72static off_t    get_off_t(rtems_shell_dd_globals* globals, const char *);
73
74static const struct arg {
75        const char *name;
76        void (*f)(rtems_shell_dd_globals* globals, char *);
77        uint_least32_t set, noset;
78} args[] = {
79        { "bs",         f_bs,           C_BS,    C_BS|C_IBS|C_OBS|C_OSYNC },
80        { "cbs",        f_cbs,          C_CBS,   C_CBS },
81        { "conv",       f_conv,         0,       0 },
82        { "count",      f_count,        C_COUNT, C_COUNT },
83        { "files",      f_files,        C_FILES, C_FILES },
84        { "fillchar",   f_fillchar,     C_FILL,  C_FILL },
85        { "ibs",        f_ibs,          C_IBS,   C_BS|C_IBS },
86        { "if",         f_if,           C_IF,    C_IF },
87        { "iseek",      f_skip,         C_SKIP,  C_SKIP },
88        { "obs",        f_obs,          C_OBS,   C_BS|C_OBS },
89        { "of",         f_of,           C_OF,    C_OF },
90        { "oseek",      f_seek,         C_SEEK,  C_SEEK },
91        { "seek",       f_seek,         C_SEEK,  C_SEEK },
92        { "skip",       f_skip,         C_SKIP,  C_SKIP },
93};
94
95static char *oper;
96
97/*
98 * args -- parse JCL syntax of dd.
99 */
100void
101jcl(rtems_shell_dd_globals* globals, char **argv)
102{
103        struct arg *ap, tmp;
104        char *arg;
105
106  oper = NULL;
107
108        in.dbsz = out.dbsz = 512;
109
110        while ((oper = *++argv) != NULL) {
111//              if ((oper = strdup(oper)) == NULL)
112//                      errx(exit_jump, 1, "unable to allocate space for the argument \"%s\"", *argv);
113                if ((arg = strchr(oper, '=')) == NULL)
114                        errx(exit_jump, 1, "unknown operand %s", oper);
115                *arg++ = '\0';
116                if (!*arg)
117                        errx(exit_jump, 1, "no value specified for %s", oper);
118                tmp.name = oper;
119                if (!(ap = (struct arg *)bsearch(&tmp, args,
120                    sizeof(args)/sizeof(struct arg), sizeof(struct arg),
121                    c_arg)))
122                        errx(exit_jump, 1, "unknown operand %s", tmp.name);
123                if (ddflags & ap->noset)
124                        errx(exit_jump, 1, "%s: illegal argument combination or already set",
125                            tmp.name);
126                ddflags |= ap->set;
127                ap->f(globals, arg);
128        }
129
130        /* Final sanity checks. */
131
132        if (ddflags & C_BS) {
133                /*
134                 * Bs is turned off by any conversion -- we assume the user
135                 * just wanted to set both the input and output block sizes
136                 * and didn't want the bs semantics, so we don't warn.
137                 */
138                if (ddflags & (C_BLOCK | C_LCASE | C_SWAB | C_UCASE |
139                    C_UNBLOCK))
140                        ddflags &= ~C_BS;
141
142                /* Bs supersedes ibs and obs. */
143                if (ddflags & C_BS && ddflags & (C_IBS | C_OBS))
144                        warnx("bs supersedes ibs and obs");
145        }
146
147        /*
148         * Ascii/ebcdic and cbs implies block/unblock.
149         * Block/unblock requires cbs and vice-versa.
150         */
151        if (ddflags & (C_BLOCK | C_UNBLOCK)) {
152                if (!(ddflags & C_CBS))
153                        errx(exit_jump, 1, "record operations require cbs");
154                if (cbsz == 0)
155                        errx(exit_jump, 1, "cbs cannot be zero");
156                cfunc = ddflags & C_BLOCK ? block : unblock;
157        } else if (ddflags & C_CBS) {
158                if (ddflags & (C_ASCII | C_EBCDIC)) {
159                        if (ddflags & C_ASCII) {
160                                ddflags |= C_UNBLOCK;
161                                cfunc = unblock;
162                        } else {
163                                ddflags |= C_BLOCK;
164                                cfunc = block;
165                        }
166                } else
167                        errx(exit_jump, 1, "cbs meaningless if not doing record operations");
168        } else
169                cfunc = def;
170
171        /*
172         * Bail out if the calculation of a file offset would overflow.
173         */
174        if (in.offset > OFF_MAX / (ssize_t)in.dbsz ||
175            out.offset > OFF_MAX / (ssize_t)out.dbsz)
176                errx(exit_jump, 1, "seek offsets cannot be larger than %jd",
177                    (intmax_t)OFF_MAX);
178}
179
180static int
181c_arg(const void *a, const void *b)
182{
183
184        return (strcmp(((const struct arg *)a)->name,
185            ((const struct arg *)b)->name));
186}
187
188static void
189f_bs(rtems_shell_dd_globals* globals, char *arg)
190{
191        uintmax_t res;
192
193        res = get_num(globals, arg);
194        if (res < 1 || res > SSIZE_MAX)
195                errx(exit_jump, 1, "bs must be between 1 and %jd", (intmax_t)SSIZE_MAX);
196        in.dbsz = out.dbsz = (size_t)res;
197}
198
199static void
200f_cbs(rtems_shell_dd_globals* globals, char *arg)
201{
202        uintmax_t res;
203
204        res = get_num(globals, arg);
205        if (res < 1 || res > SSIZE_MAX)
206                errx(exit_jump, 1, "cbs must be between 1 and %jd", (intmax_t)SSIZE_MAX);
207        cbsz = (size_t)res;
208}
209
210static void
211f_count(rtems_shell_dd_globals* globals, char *arg)
212{
213        intmax_t res;
214
215        res = (intmax_t)get_num(globals, arg);
216        if (res < 0)
217                errx(exit_jump, 1, "count cannot be negative");
218        if (res == 0)
219                cpy_cnt = (uintmax_t)-1;
220        else
221                cpy_cnt = (uintmax_t)res;
222}
223
224static void
225f_files(rtems_shell_dd_globals* globals, char *arg)
226{
227
228        files_cnt = get_num(globals, arg);
229        if (files_cnt < 1)
230                errx(exit_jump, 1, "files must be between 1 and %jd", (uintmax_t)-1);
231}
232
233static void
234f_fillchar(rtems_shell_dd_globals* globals, char *arg)
235{
236
237        if (strlen(arg) != 1)
238                errx(exit_jump, 1, "need exactly one fill char");
239
240        fill_char = arg[0];
241}
242
243static void
244f_ibs(rtems_shell_dd_globals* globals, char *arg)
245{
246        uintmax_t res;
247
248        if (!(ddflags & C_BS)) {
249                res = get_num(globals, arg);
250                if (res < 1 || res > SSIZE_MAX)
251                        errx(exit_jump, 1, "ibs must be between 1 and %jd",
252                            (intmax_t)SSIZE_MAX);
253                in.dbsz = (size_t)res;
254        }
255}
256
257static void
258f_if(rtems_shell_dd_globals* globals, char *arg)
259{
260
261        in.name = strdup(arg);
262}
263
264static void
265f_obs(rtems_shell_dd_globals* globals, char *arg)
266{
267        uintmax_t res;
268
269        if (!(ddflags & C_BS)) {
270                res = get_num(globals, arg);
271                if (res < 1 || res > SSIZE_MAX)
272                        errx(exit_jump, 1, "obs must be between 1 and %jd",
273                            (intmax_t)SSIZE_MAX);
274                out.dbsz = (size_t)res;
275        }
276}
277
278static void
279f_of(rtems_shell_dd_globals* globals, char *arg)
280{
281
282        out.name = strdup(arg);
283}
284
285static void
286f_seek(rtems_shell_dd_globals* globals, char *arg)
287{
288
289        out.offset = get_off_t(globals, arg);
290}
291
292static void
293f_skip(rtems_shell_dd_globals* globals, char *arg)
294{
295
296        in.offset = get_off_t(globals, arg);
297}
298
299static const struct conv {
300        const char *name;
301        uint_least32_t set, noset;
302        const u_char *ctab_;
303} clist[] = {
304        { "ascii",      C_ASCII,        C_EBCDIC,       e2a_POSIX },
305        { "block",      C_BLOCK,        C_UNBLOCK,      NULL },
306        { "ebcdic",     C_EBCDIC,       C_ASCII,        a2e_POSIX },
307        { "ibm",        C_EBCDIC,       C_ASCII,        a2ibm_POSIX },
308        { "lcase",      C_LCASE,        C_UCASE,        NULL },
309        { "noerror",    C_NOERROR,      0,              NULL },
310        { "notrunc",    C_NOTRUNC,      0,              NULL },
311        { "oldascii",   C_ASCII,        C_EBCDIC,       e2a_32V },
312        { "oldebcdic",  C_EBCDIC,       C_ASCII,        a2e_32V },
313        { "oldibm",     C_EBCDIC,       C_ASCII,        a2ibm_32V },
314        { "osync",      C_OSYNC,        C_BS,           NULL },
315        { "pareven",    C_PAREVEN,      C_PARODD|C_PARSET|C_PARNONE, NULL},
316        { "parnone",    C_PARNONE,      C_PARODD|C_PARSET|C_PAREVEN, NULL},
317        { "parodd",     C_PARODD,       C_PAREVEN|C_PARSET|C_PARNONE, NULL},
318        { "parset",     C_PARSET,       C_PARODD|C_PAREVEN|C_PARNONE, NULL},
319        { "sparse",     C_SPARSE,       0,              NULL },
320        { "swab",       C_SWAB,         0,              NULL },
321        { "sync",       C_SYNC,         0,              NULL },
322        { "ucase",      C_UCASE,        C_LCASE,        NULL },
323        { "unblock",    C_UNBLOCK,      C_BLOCK,        NULL },
324};
325
326static void
327f_conv(rtems_shell_dd_globals* globals, char *arg)
328{
329        struct conv *cp, tmp;
330
331        while (arg != NULL) {
332                tmp.name = strsep(&arg, ",");
333                cp = bsearch(&tmp, clist, sizeof(clist) / sizeof(struct conv),
334                    sizeof(struct conv), c_conv);
335                if (cp == NULL)
336                        errx(exit_jump, 1, "unknown conversion %s", tmp.name);
337                if (ddflags & cp->noset)
338                        errx(exit_jump, 1, "%s: illegal conversion combination", tmp.name);
339                ddflags |= cp->set;
340                if (cp->ctab_)
341                        ctab = cp->ctab_;
342        }
343}
344
345static int
346c_conv(const void *a, const void *b)
347{
348
349        return (strcmp(((const struct conv *)a)->name,
350            ((const struct conv *)b)->name));
351}
352
353/*
354 * Convert an expression of the following forms to a uintmax_t.
355 *      1) A positive decimal number.
356 *      2) A positive decimal number followed by a 'b' or 'B' (mult by 512).
357 *      3) A positive decimal number followed by a 'k' or 'K' (mult by 1 << 10).
358 *      4) A positive decimal number followed by a 'm' or 'M' (mult by 1 << 20).
359 *      5) A positive decimal number followed by a 'g' or 'G' (mult by 1 << 30).
360 *      5) A positive decimal number followed by a 'w' or 'W' (mult by sizeof int).
361 *      6) Two or more positive decimal numbers (with/without [BbKkMmGgWw])
362 *         separated by 'x' or 'X' (also '*' for backwards compatibility),
363 *         specifying the product of the indicated values.
364 */
365static uintmax_t
366get_num(rtems_shell_dd_globals* globals, const char *val)
367{
368        uintmax_t num, mult, prevnum;
369        char *expr;
370
371        errno = 0;
372        num = strtouq(val, &expr, 0);
373        if (errno != 0)                         /* Overflow or underflow. */
374                err(exit_jump, 1, "%s", oper);
375
376        if (expr == val)                        /* No valid digits. */
377                errx(exit_jump, 1, "%s: illegal numeric value", oper);
378
379        mult = 0;
380        switch (*expr) {
381        case 'B':
382        case 'b':
383                mult = UINT32_C(512);
384                break;
385        case 'K':
386        case 'k':
387                mult = UINT32_C(1) << 10;
388                break;
389        case 'M':
390        case 'm':
391                mult = UINT32_C(1) << 20;
392                break;
393        case 'G':
394        case 'g':
395                mult = UINT32_C(1) << 30;
396                break;
397        case 'W':
398        case 'w':
399                mult = sizeof(int);
400                break;
401        default:
402                ;
403        }
404
405        if (mult != 0) {
406                prevnum = num;
407                num *= mult;
408                /* Check for overflow. */
409                if (num / mult != prevnum)
410                        goto erange;
411                expr++;
412        }
413
414        switch (*expr) {
415                case '\0':
416                        break;
417                case '*':                       /* Backward compatible. */
418                case 'X':
419                case 'x':
420                        mult = get_num(globals, expr + 1);
421                        prevnum = num;
422                        num *= mult;
423                        if (num / mult == prevnum)
424                                break;
425erange:
426                        errx(exit_jump, 1, "%s: %s", oper, strerror(ERANGE));
427                default:
428                        errx(exit_jump, 1, "%s: illegal numeric value", oper);
429        }
430        return (num);
431}
432
433/*
434 * Convert an expression of the following forms to an off_t.  This is the
435 * same as get_num(), but it uses signed numbers.
436 *
437 * The major problem here is that an off_t may not necessarily be a intmax_t.
438 */
439static off_t
440get_off_t(rtems_shell_dd_globals* globals, const char *val)
441{
442        intmax_t num, mult, prevnum;
443        char *expr;
444
445        errno = 0;
446        num = strtoq(val, &expr, 0);
447        if (errno != 0)                         /* Overflow or underflow. */
448                err(exit_jump, 1, "%s", oper);
449
450        if (expr == val)                        /* No valid digits. */
451                errx(exit_jump, 1, "%s: illegal numeric value", oper);
452
453        mult = 0;
454        switch (*expr) {
455        case 'B':
456        case 'b':
457                mult = UINT32_C(512);
458                break;
459        case 'K':
460        case 'k':
461                mult = UINT32_C(1) << 10;
462                break;
463        case 'M':
464        case 'm':
465                mult = UINT32_C(1) << 20;
466                break;
467        case 'G':
468        case 'g':
469                mult = UINT32_C(1) << 30;
470                break;
471        case 'W':
472        case 'w':
473                mult = sizeof(int);
474                break;
475        }
476
477        if (mult != 0) {
478                prevnum = num;
479                num *= mult;
480                /* Check for overflow. */
481                if ((prevnum > 0) != (num > 0) || num / mult != prevnum)
482                        goto erange;
483                expr++;
484        }
485
486        switch (*expr) {
487                case '\0':
488                        break;
489                case '*':                       /* Backward compatible. */
490                case 'X':
491                case 'x':
492                        mult = (intmax_t)get_off_t(globals, expr + 1);
493                        prevnum = num;
494                        num *= mult;
495                        if ((prevnum > 0) == (num > 0) && num / mult == prevnum)
496                                break;
497erange:
498                        errx(exit_jump, 1, "%s: %s", oper, strerror(ERANGE));
499                default:
500                        errx(exit_jump, 1, "%s: illegal numeric value", oper);
501        }
502        return (num);
503}
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