2 * Copyright (c) 1991, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
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.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
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 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by the University of
20 * California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
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37 * @(#)args.c 8.3 (Berkeley) 4/2/94
38 * $FreeBSD: src/bin/dd/args.c,v 1.25.2.2 2001/01/23 14:20:03 asmodai Exp $
39 * $DragonFly: src/bin/dd/args.c,v 1.2 2003/06/17 04:22:49 dillon Exp $
42 #include <sys/types.h>
53 static int c_arg __P((const void *, const void *));
54 static int c_conv __P((const void *, const void *));
55 static void f_bs __P((char *));
56 static void f_cbs __P((char *));
57 static void f_conv __P((char *));
58 static void f_count __P((char *));
59 static void f_files __P((char *));
60 static void f_ibs __P((char *));
61 static void f_if __P((char *));
62 static void f_obs __P((char *));
63 static void f_of __P((char *));
64 static void f_seek __P((char *));
65 static void f_skip __P((char *));
66 static quad_t get_num __P((char *));
67 static off_t get_offset __P((char *));
69 static const struct arg {
71 void (*f) __P((char *));
74 { "bs", f_bs, C_BS, C_BS|C_IBS|C_OBS|C_OSYNC },
75 { "cbs", f_cbs, C_CBS, C_CBS },
76 { "conv", f_conv, 0, 0 },
77 { "count", f_count, C_COUNT, C_COUNT },
78 { "files", f_files, C_FILES, C_FILES },
79 { "ibs", f_ibs, C_IBS, C_BS|C_IBS },
80 { "if", f_if, C_IF, C_IF },
81 { "iseek", f_skip, C_SKIP, C_SKIP },
82 { "obs", f_obs, C_OBS, C_BS|C_OBS },
83 { "of", f_of, C_OF, C_OF },
84 { "oseek", f_seek, C_SEEK, C_SEEK },
85 { "seek", f_seek, C_SEEK, C_SEEK },
86 { "skip", f_skip, C_SKIP, C_SKIP },
92 * args -- parse JCL syntax of dd.
101 in.dbsz = out.dbsz = 512;
103 while ((oper = *++argv) != NULL) {
104 if ((oper = strdup(oper)) == NULL)
105 errx(1, "unable to allocate space for the argument \"%s\"", *argv);
106 if ((arg = strchr(oper, '=')) == NULL)
107 errx(1, "unknown operand %s", oper);
110 errx(1, "no value specified for %s", oper);
112 if (!(ap = (struct arg *)bsearch(&tmp, args,
113 sizeof(args)/sizeof(struct arg), sizeof(struct arg),
115 errx(1, "unknown operand %s", tmp.name);
116 if (ddflags & ap->noset)
117 errx(1, "%s: illegal argument combination or already set",
123 /* Final sanity checks. */
125 if (ddflags & C_BS) {
127 * Bs is turned off by any conversion -- we assume the user
128 * just wanted to set both the input and output block sizes
129 * and didn't want the bs semantics, so we don't warn.
131 if (ddflags & (C_BLOCK | C_LCASE | C_SWAB | C_UCASE |
135 /* Bs supersedes ibs and obs. */
136 if (ddflags & C_BS && ddflags & (C_IBS | C_OBS))
137 warnx("bs supersedes ibs and obs");
141 * Ascii/ebcdic and cbs implies block/unblock.
142 * Block/unblock requires cbs and vice-versa.
144 if (ddflags & (C_BLOCK | C_UNBLOCK)) {
145 if (!(ddflags & C_CBS))
146 errx(1, "record operations require cbs");
148 errx(1, "cbs cannot be zero");
149 cfunc = ddflags & C_BLOCK ? block : unblock;
150 } else if (ddflags & C_CBS) {
151 if (ddflags & (C_ASCII | C_EBCDIC)) {
152 if (ddflags & C_ASCII) {
153 ddflags |= C_UNBLOCK;
160 errx(1, "cbs meaningless if not doing record operations");
165 * Bail out if the calculation of a file offset would overflow.
167 if (in.offset > QUAD_MAX / in.dbsz || out.offset > QUAD_MAX / out.dbsz)
168 errx(1, "seek offsets cannot be larger than %qd", QUAD_MAX);
176 return (strcmp(((const struct arg *)a)->name,
177 ((const struct arg *)b)->name));
187 if (res < 1 || res > SSIZE_MAX)
188 errx(1, "bs must be between 1 and %d", SSIZE_MAX);
189 in.dbsz = out.dbsz = (size_t)res;
199 if (res < 1 || res > SSIZE_MAX)
200 errx(1, "cbs must be between 1 and %d", SSIZE_MAX);
209 cpy_cnt = get_num(arg);
211 errx(1, "count cannot be negative");
221 files_cnt = get_num(arg);
223 errx(1, "files must be between 1 and %qd", QUAD_MAX);
232 if (!(ddflags & C_BS)) {
234 if (res < 1 || res > SSIZE_MAX)
235 errx(1, "ibs must be between 1 and %d", SSIZE_MAX);
236 in.dbsz = (size_t)res;
254 if (!(ddflags & C_BS)) {
256 if (res < 1 || res > SSIZE_MAX)
257 errx(1, "obs must be between 1 and %d", SSIZE_MAX);
258 out.dbsz = (size_t)res;
275 out.offset = get_offset(arg);
283 in.offset = get_offset(arg);
286 static const struct conv {
291 { "ascii", C_ASCII, C_EBCDIC, e2a_POSIX },
292 { "block", C_BLOCK, C_UNBLOCK, NULL },
293 { "ebcdic", C_EBCDIC, C_ASCII, a2e_POSIX },
294 { "ibm", C_EBCDIC, C_ASCII, a2ibm_POSIX },
295 { "lcase", C_LCASE, C_UCASE, NULL },
296 { "noerror", C_NOERROR, 0, NULL },
297 { "notrunc", C_NOTRUNC, 0, NULL },
298 { "oldascii", C_ASCII, C_EBCDIC, e2a_32V },
299 { "oldebcdic", C_EBCDIC, C_ASCII, a2e_32V },
300 { "oldibm", C_EBCDIC, C_ASCII, a2ibm_32V },
301 { "osync", C_OSYNC, C_BS, NULL },
302 { "sparse", C_SPARSE, 0, NULL },
303 { "swab", C_SWAB, 0, NULL },
304 { "sync", C_SYNC, 0, NULL },
305 { "ucase", C_UCASE, C_LCASE, NULL },
306 { "unblock", C_UNBLOCK, C_BLOCK, NULL },
313 struct conv *cp, tmp;
315 while (arg != NULL) {
316 tmp.name = strsep(&arg, ",");
317 cp = bsearch(&tmp, clist, sizeof(clist) / sizeof(struct conv),
318 sizeof(struct conv), c_conv);
320 errx(1, "unknown conversion %s", tmp.name);
321 if (ddflags & cp->noset)
322 errx(1, "%s: illegal conversion combination", tmp.name);
334 return (strcmp(((const struct conv *)a)->name,
335 ((const struct conv *)b)->name));
339 * Convert an expression of the following forms to a quad_t.
340 * 1) A positive decimal number.
341 * 2) A positive decimal number followed by a b (mult by 512.)
342 * 3) A positive decimal number followed by a k (mult by 1 << 10.)
343 * 4) A positive decimal number followed by a m (mult by 1 << 20.)
344 * 5) A positive decimal number followed by a g (mult by 1 << 30.)
345 * 5) A positive decimal number followed by a w (mult by sizeof int.)
346 * 6) Two or more positive decimal numbers (with/without [bkmgw])
347 * separated by x (also * for backwards compatibility), specifying
348 * the product of the indicated values.
358 num = strtoq(val, &expr, 0);
359 if (errno != 0) /* Overflow or underflow. */
362 if (expr == val) /* No valid digits. */
363 errx(1, "%s: illegal numeric value", oper);
406 case '*': /* Backward compatible. */
409 num *= get_num(expr + 1);
413 errx(1, "%s: %s", oper, strerror(ERANGE));
415 errx(1, "%s: illegal numeric value", oper);
427 if (num > QUAD_MAX) /* XXX can't happen && quad_t != off_t */
428 errx(1, "%s: illegal offset", oper); /* Too big. */