Annotation of src/bin/dd/args.c, Revision 1.3
1.1 glass 1: /*-
1.3 ! mycroft 2: * Copyright (c) 1991, 1993, 1994
! 3: * The Regents of the University of California. All rights reserved.
1.1 glass 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: * 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.
24: *
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
35: * SUCH DAMAGE.
36: */
37:
38: #ifndef lint
1.3 ! mycroft 39: /*static char sccsid[] = "from: @(#)args.c 8.3 (Berkeley) 4/2/94";*/
! 40: static char *rcsid = "$Id: $";
1.1 glass 41: #endif /* not lint */
42:
43: #include <sys/types.h>
1.3 ! mycroft 44:
! 45: #include <err.h>
! 46: #include <errno.h>
1.1 glass 47: #include <limits.h>
48: #include <stdio.h>
49: #include <stdlib.h>
50: #include <string.h>
1.3 ! mycroft 51:
1.1 glass 52: #include "dd.h"
53: #include "extern.h"
54:
1.3 ! mycroft 55: static int c_arg __P((const void *, const void *));
! 56: static int c_conv __P((const void *, const void *));
! 57: static void f_bs __P((char *));
! 58: static void f_cbs __P((char *));
! 59: static void f_conv __P((char *));
! 60: static void f_count __P((char *));
! 61: static void f_files __P((char *));
! 62: static void f_ibs __P((char *));
! 63: static void f_if __P((char *));
! 64: static void f_obs __P((char *));
! 65: static void f_of __P((char *));
! 66: static void f_seek __P((char *));
! 67: static void f_skip __P((char *));
! 68: static u_long get_bsz __P((char *));
1.1 glass 69:
70: static struct arg {
71: char *name;
72: void (*f) __P((char *));
73: u_int set, noset;
74: } args[] = {
1.3 ! mycroft 75: { "bs", f_bs, C_BS, C_BS|C_IBS|C_OBS|C_OSYNC },
! 76: { "cbs", f_cbs, C_CBS, C_CBS },
! 77: { "conv", f_conv, 0, 0 },
! 78: { "count", f_count, C_COUNT, C_COUNT },
! 79: { "files", f_files, C_FILES, C_FILES },
! 80: { "ibs", f_ibs, C_IBS, C_BS|C_IBS },
! 81: { "if", f_if, C_IF, C_IF },
! 82: { "obs", f_obs, C_OBS, C_BS|C_OBS },
! 83: { "of", f_of, C_OF, C_OF },
! 84: { "seek", f_seek, C_SEEK, C_SEEK },
! 85: { "skip", f_skip, C_SKIP, C_SKIP },
1.1 glass 86: };
87:
88: static char *oper;
89:
90: /*
91: * args -- parse JCL syntax of dd.
92: */
93: void
94: jcl(argv)
1.3 ! mycroft 95: char **argv;
1.1 glass 96: {
1.3 ! mycroft 97: struct arg *ap, tmp;
1.1 glass 98: char *arg;
99:
100: in.dbsz = out.dbsz = 512;
101:
102: while (oper = *++argv) {
1.3 ! mycroft 103: if ((arg = strchr(oper, '=')) == NULL)
! 104: errx(1, "unknown operand %s", oper);
1.1 glass 105: *arg++ = '\0';
106: if (!*arg)
1.3 ! mycroft 107: errx(1, "no value specified for %s", oper);
1.1 glass 108: tmp.name = oper;
109: if (!(ap = (struct arg *)bsearch(&tmp, args,
110: sizeof(args)/sizeof(struct arg), sizeof(struct arg),
111: c_arg)))
1.3 ! mycroft 112: errx(1, "unknown operand %s", tmp.name);
1.1 glass 113: if (ddflags & ap->noset)
1.3 ! mycroft 114: errx(1, "%s: illegal argument combination or already set",
1.1 glass 115: tmp.name);
116: ddflags |= ap->set;
117: ap->f(arg);
118: }
119:
120: /* Final sanity checks. */
121:
122: if (ddflags & C_BS) {
123: /*
124: * Bs is turned off by any conversion -- we assume the user
125: * just wanted to set both the input and output block sizes
126: * and didn't want the bs semantics, so we don't warn.
127: */
128: if (ddflags & (C_BLOCK|C_LCASE|C_SWAB|C_UCASE|C_UNBLOCK))
129: ddflags &= ~C_BS;
130:
131: /* Bs supersedes ibs and obs. */
132: if (ddflags & C_BS && ddflags & (C_IBS|C_OBS))
1.3 ! mycroft 133: warnx("bs supersedes ibs and obs");
1.1 glass 134: }
135:
136: /*
137: * Ascii/ebcdic and cbs implies block/unblock.
138: * Block/unblock requires cbs and vice-versa.
139: */
140: if (ddflags & (C_BLOCK|C_UNBLOCK)) {
141: if (!(ddflags & C_CBS))
1.3 ! mycroft 142: errx(1, "record operations require cbs");
1.1 glass 143: if (cbsz == 0)
1.3 ! mycroft 144: errx(1, "cbs cannot be zero");
1.1 glass 145: cfunc = ddflags & C_BLOCK ? block : unblock;
146: } else if (ddflags & C_CBS) {
147: if (ddflags & (C_ASCII|C_EBCDIC)) {
148: if (ddflags & C_ASCII) {
149: ddflags |= C_UNBLOCK;
150: cfunc = unblock;
151: } else {
152: ddflags |= C_BLOCK;
153: cfunc = block;
154: }
155: } else
1.3 ! mycroft 156: errx(1, "cbs meaningless if not doing record operations");
1.1 glass 157: if (cbsz == 0)
1.3 ! mycroft 158: errx(1, "cbs cannot be zero");
1.1 glass 159: } else
160: cfunc = def;
161:
162: if (in.dbsz == 0 || out.dbsz == 0)
1.3 ! mycroft 163: errx(1, "buffer sizes cannot be zero");
1.1 glass 164:
165: /*
166: * Read, write and seek calls take ints as arguments. Seek sizes
167: * could be larger if we wanted to do it in stages or check only
168: * regular files, but it's probably not worth it.
169: */
170: if (in.dbsz > INT_MAX || out.dbsz > INT_MAX)
1.3 ! mycroft 171: errx(1, "buffer sizes cannot be greater than %d", INT_MAX);
1.1 glass 172: if (in.offset > INT_MAX / in.dbsz || out.offset > INT_MAX / out.dbsz)
1.3 ! mycroft 173: errx(1, "seek offsets cannot be larger than %d", INT_MAX);
1.1 glass 174: }
175:
176: static int
177: c_arg(a, b)
178: const void *a, *b;
179: {
1.3 ! mycroft 180:
1.1 glass 181: return (strcmp(((struct arg *)a)->name, ((struct arg *)b)->name));
182: }
183:
184: static void
185: f_bs(arg)
186: char *arg;
187: {
1.3 ! mycroft 188:
1.1 glass 189: in.dbsz = out.dbsz = (int)get_bsz(arg);
190: }
191:
192: static void
193: f_cbs(arg)
194: char *arg;
195: {
1.3 ! mycroft 196:
1.1 glass 197: cbsz = (int)get_bsz(arg);
198: }
199:
200: static void
201: f_count(arg)
202: char *arg;
203: {
1.3 ! mycroft 204:
1.1 glass 205: cpy_cnt = (u_int)get_bsz(arg);
206: if (!cpy_cnt)
207: terminate(0);
208: }
209:
210: static void
211: f_files(arg)
212: char *arg;
213: {
1.3 ! mycroft 214:
1.1 glass 215: files_cnt = (int)get_bsz(arg);
216: }
217:
218: static void
219: f_ibs(arg)
220: char *arg;
221: {
1.3 ! mycroft 222:
1.1 glass 223: if (!(ddflags & C_BS))
224: in.dbsz = (int)get_bsz(arg);
225: }
226:
227: static void
228: f_if(arg)
229: char *arg;
230: {
1.3 ! mycroft 231:
1.1 glass 232: in.name = arg;
233: }
234:
235: static void
236: f_obs(arg)
237: char *arg;
238: {
1.3 ! mycroft 239:
1.1 glass 240: if (!(ddflags & C_BS))
241: out.dbsz = (int)get_bsz(arg);
242: }
243:
244: static void
245: f_of(arg)
246: char *arg;
247: {
1.3 ! mycroft 248:
1.1 glass 249: out.name = arg;
250: }
251:
252: static void
253: f_seek(arg)
254: char *arg;
255: {
1.3 ! mycroft 256:
1.1 glass 257: out.offset = (u_int)get_bsz(arg);
258: }
259:
260: static void
261: f_skip(arg)
262: char *arg;
263: {
1.3 ! mycroft 264:
1.1 glass 265: in.offset = (u_int)get_bsz(arg);
266: }
267:
268: static struct conv {
269: char *name;
270: u_int set, noset;
271: u_char *ctab;
272: } clist[] = {
1.3 ! mycroft 273: { "ascii", C_ASCII, C_EBCDIC, e2a_POSIX },
! 274: { "block", C_BLOCK, C_UNBLOCK, NULL },
! 275: { "ebcdic", C_EBCDIC, C_ASCII, a2e_POSIX },
! 276: { "ibm", C_EBCDIC, C_ASCII, a2ibm_POSIX },
! 277: { "lcase", C_LCASE, C_UCASE, NULL },
! 278: { "noerror", C_NOERROR, 0, NULL },
! 279: { "notrunc", C_NOTRUNC, 0, NULL },
! 280: { "oldascii", C_ASCII, C_EBCDIC, e2a_32V },
! 281: { "oldebcdic", C_EBCDIC, C_ASCII, a2e_32V },
! 282: { "oldibm", C_EBCDIC, C_ASCII, a2ibm_32V },
! 283: { "osync", C_OSYNC, C_BS, NULL },
! 284: { "swab", C_SWAB, 0, NULL },
! 285: { "sync", C_SYNC, 0, NULL },
! 286: { "ucase", C_UCASE, C_LCASE, NULL },
! 287: { "unblock", C_UNBLOCK, C_BLOCK, NULL },
1.1 glass 288: };
289:
290: static void
291: f_conv(arg)
292: char *arg;
293: {
1.3 ! mycroft 294: struct conv *cp, tmp;
1.1 glass 295:
296: while (arg != NULL) {
297: tmp.name = strsep(&arg, ",");
298: if (!(cp = (struct conv *)bsearch(&tmp, clist,
299: sizeof(clist)/sizeof(struct conv), sizeof(struct conv),
300: c_conv)))
1.3 ! mycroft 301: errx(1, "unknown conversion %s", tmp.name);
1.1 glass 302: if (ddflags & cp->noset)
1.3 ! mycroft 303: errx(1, "%s: illegal conversion combination", tmp.name);
1.1 glass 304: ddflags |= cp->set;
305: if (cp->ctab)
306: ctab = cp->ctab;
307: }
308: }
309:
310: static int
311: c_conv(a, b)
312: const void *a, *b;
313: {
1.3 ! mycroft 314:
1.1 glass 315: return (strcmp(((struct conv *)a)->name, ((struct conv *)b)->name));
316: }
317:
318: /*
319: * Convert an expression of the following forms to an unsigned long.
320: * 1) A positive decimal number.
321: * 2) A positive decimal number followed by a b (mult by 512).
322: * 3) A positive decimal number followed by a k (mult by 1024).
323: * 4) A positive decimal number followed by a m (mult by 512).
324: * 5) A positive decimal number followed by a w (mult by sizeof int)
325: * 6) Two or more positive decimal numbers (with/without k,b or w).
326: * seperated by x (also * for backwards compatibility), specifying
327: * the product of the indicated values.
328: */
329: static u_long
330: get_bsz(val)
331: char *val;
332: {
1.3 ! mycroft 333: u_long num, t;
1.1 glass 334: char *expr;
335:
336: num = strtoul(val, &expr, 0);
337: if (num == ULONG_MAX) /* Overflow. */
1.3 ! mycroft 338: err(1, "%s", oper);
1.1 glass 339: if (expr == val) /* No digits. */
1.3 ! mycroft 340: errx(1, "%s: illegal numeric value", oper);
1.1 glass 341:
342: switch(*expr) {
343: case 'b':
344: t = num;
345: num *= 512;
346: if (t > num)
347: goto erange;
348: ++expr;
349: break;
350: case 'k':
351: t = num;
352: num *= 1024;
353: if (t > num)
354: goto erange;
355: ++expr;
356: break;
357: case 'm':
358: t = num;
359: num *= 1048576;
360: if (t > num)
361: goto erange;
362: ++expr;
363: break;
364: case 'w':
365: t = num;
366: num *= sizeof(int);
367: if (t > num)
368: goto erange;
369: ++expr;
370: break;
371: }
372:
373: switch(*expr) {
374: case '\0':
375: break;
376: case '*': /* Backward compatible. */
377: case 'x':
378: t = num;
379: num *= get_bsz(expr + 1);
380: if (t > num)
1.3 ! mycroft 381: erange: errx(1, "%s: %s", oper, strerror(ERANGE));
1.1 glass 382: break;
383: default:
1.3 ! mycroft 384: errx(1, "%s: illegal numeric value", oper);
1.1 glass 385: }
1.3 ! mycroft 386: return (num);
1.1 glass 387: }
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