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git.saurik.com Git - apple/file_cmds.git/blob - dd/args.c
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.
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
40 static char sccsid
[] = "@(#)args.c 8.3 (Berkeley) 4/2/94";
42 static const char rcsid
[] =
43 "$FreeBSD: src/bin/dd/args.c,v 1.31 2002/02/22 20:51:00 markm Exp $";
46 #include <sys/types.h>
57 static int c_arg(const void *, const void *);
58 static int c_conv(const void *, const void *);
59 static void f_bs(char *);
60 static void f_cbs(char *);
61 static void f_conv(char *);
62 static void f_count(char *);
63 static void f_files(char *);
64 static void f_ibs(char *);
65 static void f_if(char *);
66 static void f_obs(char *);
67 static void f_of(char *);
68 static void f_seek(char *);
69 static void f_skip(char *);
70 static quad_t
get_num(char *);
71 static off_t
get_offset(char *);
73 static const struct arg
{
78 { "bs", f_bs
, C_BS
, C_BS
|C_OSYNC
},
79 { "cbs", f_cbs
, C_CBS
, C_CBS
},
80 { "conv", f_conv
, 0, 0 },
81 { "count", f_count
, C_COUNT
, C_COUNT
},
82 { "files", f_files
, C_FILES
, C_FILES
},
83 { "ibs", f_ibs
, C_IBS
, C_IBS
},
84 { "if", f_if
, C_IF
, C_IF
},
85 { "iseek", f_skip
, C_SKIP
, C_SKIP
},
86 { "obs", f_obs
, C_OBS
, C_OBS
},
87 { "of", f_of
, C_OF
, C_OF
},
88 { "oseek", f_seek
, C_SEEK
, C_SEEK
},
89 { "seek", f_seek
, C_SEEK
, C_SEEK
},
90 { "skip", f_skip
, C_SKIP
, C_SKIP
},
96 * args -- parse JCL syntax of dd.
104 in
.dbsz
= out
.dbsz
= 512;
106 if (argv
[1] && !strcmp(argv
[1], "--")) /* skip delimiter before operands */
108 while ((oper
= *++argv
) != NULL
) {
109 if ((oper
= strdup(oper
)) == NULL
)
110 errx(1, "unable to allocate space for the argument \"%s\"", *argv
);
111 if ((arg
= strchr(oper
, '=')) == NULL
)
112 errx(1, "unknown operand %s", oper
);
115 errx(1, "no value specified for %s", oper
);
117 if (!(ap
= (struct arg
*)bsearch(&tmp
, args
,
118 sizeof(args
)/sizeof(struct arg
), sizeof(struct arg
),
120 errx(1, "unknown operand %s", tmp
.name
);
121 if (ddflags
& ap
->noset
)
122 errx(1, "%s: illegal argument combination or already set",
128 /* Final sanity checks. */
130 if (ddflags
& C_BS
) {
132 * Bs is turned off by any conversion -- we assume the user
133 * just wanted to set both the input and output block sizes
134 * and didn't want the bs semantics, so we don't warn.
136 if (ddflags
& (C_BLOCK
| C_LCASE
| C_SWAB
| C_UCASE
|
140 /* Bs supersedes ibs and obs. */
141 if (ddflags
& C_BS
&& ddflags
& (C_IBS
| C_OBS
))
142 warnx("bs supersedes ibs and obs");
146 * Ascii/ebcdic and cbs implies block/unblock.
147 * Block/unblock requires cbs and vice-versa.
149 if (ddflags
& (C_BLOCK
| C_UNBLOCK
)) {
150 if (!(ddflags
& C_CBS
))
151 errx(1, "record operations require cbs");
153 errx(1, "cbs cannot be zero");
154 cfunc
= ddflags
& C_BLOCK
? block
: unblock
;
155 } else if (ddflags
& C_CBS
) {
156 if (ddflags
& (C_ASCII
| C_EBCDIC
)) {
157 if (ddflags
& C_ASCII
) {
158 ddflags
|= C_UNBLOCK
;
165 errx(1, "cbs meaningless if not doing record operations");
170 * Bail out if the calculation of a file offset would overflow.
172 if (in
.offset
> QUAD_MAX
/ in
.dbsz
|| out
.offset
> QUAD_MAX
/ out
.dbsz
)
173 errx(1, "seek offsets cannot be larger than %qd", QUAD_MAX
);
177 c_arg(const void *a
, const void *b
)
180 return (strcmp(((const struct arg
*)a
)->name
,
181 ((const struct arg
*)b
)->name
));
190 if (res
< 1 || res
> SSIZE_MAX
)
191 errx(1, "bs must be between 1 and %d", SSIZE_MAX
);
192 in
.dbsz
= out
.dbsz
= (size_t)res
;
201 if (res
< 1 || res
> SSIZE_MAX
)
202 errx(1, "cbs must be between 1 and %d", SSIZE_MAX
);
210 cpy_cnt
= get_num(arg
);
212 errx(1, "count cannot be negative");
221 files_cnt
= get_num(arg
);
223 errx(1, "files must be between 1 and %qd", QUAD_MAX
);
231 if (!(ddflags
& C_BS
)) {
233 if (res
< 1 || res
> SSIZE_MAX
)
234 errx(1, "ibs must be between 1 and %d", SSIZE_MAX
);
235 in
.dbsz
= (size_t)res
;
251 if (!(ddflags
& C_BS
)) {
253 if (res
< 1 || res
> SSIZE_MAX
)
254 errx(1, "obs must be between 1 and %d", SSIZE_MAX
);
255 out
.dbsz
= (size_t)res
;
270 out
.offset
= get_offset(arg
);
277 in
.offset
= get_offset(arg
);
280 static const struct conv
{
285 { "ascii", C_ASCII
, C_EBCDIC
, e2a_POSIX
},
286 { "block", C_BLOCK
, C_UNBLOCK
, NULL
},
287 { "ebcdic", C_EBCDIC
, C_ASCII
, a2e_POSIX
},
288 { "ibm", C_EBCDIC
, C_ASCII
, a2ibm_POSIX
},
289 { "lcase", C_LCASE
, C_UCASE
, NULL
},
290 { "noerror", C_NOERROR
, 0, NULL
},
291 { "notrunc", C_NOTRUNC
, 0, NULL
},
292 { "oldascii", C_ASCII
, C_EBCDIC
, e2a_32V
},
293 { "oldebcdic", C_EBCDIC
, C_ASCII
, a2e_32V
},
294 { "oldibm", C_EBCDIC
, C_ASCII
, a2ibm_32V
},
295 { "osync", C_OSYNC
, C_BS
, NULL
},
296 { "sparse", C_SPARSE
, 0, NULL
},
297 { "swab", C_SWAB
, 0, NULL
},
298 { "sync", C_SYNC
, 0, NULL
},
299 { "ucase", C_UCASE
, C_LCASE
, NULL
},
300 { "unblock", C_UNBLOCK
, C_BLOCK
, NULL
},
306 struct conv
*cp
, tmp
;
308 while (arg
!= NULL
) {
309 tmp
.name
= strsep(&arg
, ",");
310 cp
= bsearch(&tmp
, clist
, sizeof(clist
) / sizeof(struct conv
),
311 sizeof(struct conv
), c_conv
);
313 errx(1, "unknown conversion %s", tmp
.name
);
314 if (ddflags
& cp
->noset
)
315 errx(1, "%s: illegal conversion combination", tmp
.name
);
323 c_conv(const void *a
, const void *b
)
326 return (strcmp(((const struct conv
*)a
)->name
,
327 ((const struct conv
*)b
)->name
));
331 * Convert an expression of the following forms to a quad_t.
332 * 1) A positive decimal number.
333 * 2) A positive decimal number followed by a b (mult by 512).
334 * 3) A positive decimal number followed by a k (mult by 1 << 10).
335 * 4) A positive decimal number followed by a m (mult by 1 << 20).
336 * 5) A positive decimal number followed by a g (mult by 1 << 30).
337 * 5) A positive decimal number followed by a w (mult by sizeof int).
338 * 6) Two or more positive decimal numbers (with/without [bkmgw])
339 * separated by x (also * for backwards compatibility), specifying
340 * the product of the indicated values.
349 num
= strtoq(val
, &expr
, 0);
350 if (errno
!= 0) /* Overflow or underflow. */
353 if (expr
== val
) /* No valid digits. */
354 errx(1, "%s: illegal numeric value", oper
);
397 case '*': /* Backward compatible. */
400 num
*= get_num(expr
+ 1);
404 errx(1, "%s: %s", oper
, strerror(ERANGE
));
406 errx(1, "%s: illegal numeric value", oper
);
412 get_offset(char *val
)
417 if (num
> QUAD_MAX
) /* XXX can't happen && quad_t != off_t */
418 errx(1, "%s: illegal offset", oper
); /* Too big. */