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Diffstat (limited to 'bin/dd/args.c')
| -rw-r--r-- | bin/dd/args.c | 373 |
1 files changed, 373 insertions, 0 deletions
diff --git a/bin/dd/args.c b/bin/dd/args.c new file mode 100644 index 000000000000..3d49a3ebe90c --- /dev/null +++ b/bin/dd/args.c @@ -0,0 +1,373 @@ +/*- + * Copyright (c) 1991 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. 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. + */ + +#ifndef lint +static char sccsid[] = "@(#)args.c 5.5 (Berkeley) 7/29/91"; +#endif /* not lint */ + +#include <sys/types.h> +#include <limits.h> +#include <errno.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include "dd.h" +#include "extern.h" + +static u_long get_bsz __P((char *)); + +static void f_bs __P((char *)); +static void f_cbs __P((char *)); +static void f_conv __P((char *)); +static void f_count __P((char *)); +static void f_files __P((char *)); +static void f_ibs __P((char *)); +static void f_if __P((char *)); +static void f_obs __P((char *)); +static void f_of __P((char *)); +static void f_seek __P((char *)); +static void f_skip __P((char *)); + +static struct arg { + char *name; + void (*f) __P((char *)); + u_int set, noset; +} args[] = { + "bs", f_bs, C_BS, C_BS|C_IBS|C_OBS, + "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, + "obs", f_obs, C_OBS, C_BS|C_OBS, + "of", f_of, C_OF, C_OF, + "seek", f_seek, C_SEEK, C_SEEK, + "skip", f_skip, C_SKIP, C_SKIP, +}; + +static char *oper; + +/* + * args -- parse JCL syntax of dd. + */ +void +jcl(argv) + register char **argv; +{ + register struct arg *ap; + struct arg tmp; + char *arg; + static int c_arg __P((const void *, const void *)); + + in.dbsz = out.dbsz = 512; + + while (oper = *++argv) { + if ((arg = index(oper, '=')) == NULL) + err("unknown operand %s", oper); + *arg++ = '\0'; + if (!*arg) + err("no value specified for %s", oper); + tmp.name = oper; + if (!(ap = (struct arg *)bsearch(&tmp, args, + sizeof(args)/sizeof(struct arg), sizeof(struct arg), + c_arg))) + err("unknown operand %s", tmp.name); + if (ddflags & ap->noset) + err("%s: illegal argument combination or already set", + tmp.name); + 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)) + ddflags &= ~C_BS; + + /* Bs supersedes ibs and obs. */ + if (ddflags & C_BS && ddflags & (C_IBS|C_OBS)) + warn("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)) + err("record operations require cbs"); + if (cbsz == 0) + err("cbs cannot be zero"); + 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 + err("cbs meaningless if not doing record operations"); + if (cbsz == 0) + err("cbs cannot be zero"); + } else + cfunc = def; + + if (in.dbsz == 0 || out.dbsz == 0) + err("buffer sizes cannot be zero"); + + /* + * Read, write and seek calls take ints as arguments. Seek sizes + * could be larger if we wanted to do it in stages or check only + * regular files, but it's probably not worth it. + */ + if (in.dbsz > INT_MAX || out.dbsz > INT_MAX) + err("buffer sizes cannot be greater than %d", INT_MAX); + if (in.offset > INT_MAX / in.dbsz || out.offset > INT_MAX / out.dbsz) + err("seek offsets cannot be larger than %d", INT_MAX); +} + +static int +c_arg(a, b) + const void *a, *b; +{ + return (strcmp(((struct arg *)a)->name, ((struct arg *)b)->name)); +} + +static void +f_bs(arg) + char *arg; +{ + in.dbsz = out.dbsz = (int)get_bsz(arg); +} + +static void +f_cbs(arg) + char *arg; +{ + cbsz = (int)get_bsz(arg); +} + +static void +f_count(arg) + char *arg; +{ + cpy_cnt = (u_int)get_bsz(arg); + if (!cpy_cnt) + terminate(0); +} + +static void +f_files(arg) + char *arg; +{ + files_cnt = (int)get_bsz(arg); +} + +static void +f_ibs(arg) + char *arg; +{ + if (!(ddflags & C_BS)) + in.dbsz = (int)get_bsz(arg); +} + +static void +f_if(arg) + char *arg; +{ + in.name = arg; +} + +static void +f_obs(arg) + char *arg; +{ + if (!(ddflags & C_BS)) + out.dbsz = (int)get_bsz(arg); +} + +static void +f_of(arg) + char *arg; +{ + out.name = arg; +} + +static void +f_seek(arg) + char *arg; +{ + out.offset = (u_int)get_bsz(arg); +} + +static void +f_skip(arg) + char *arg; +{ + in.offset = (u_int)get_bsz(arg); +} + +static struct conv { + char *name; + u_int set, noset; + 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, + "swab", C_SWAB, 0, NULL, + "sync", C_SYNC, 0, NULL, + "ucase", C_UCASE, C_LCASE, NULL, + "unblock", C_UNBLOCK, C_BLOCK, NULL, +}; + +static void +f_conv(arg) + char *arg; +{ + register struct conv *cp; + struct conv tmp; + static int c_conv __P((const void *, const void *)); + + while (arg != NULL) { + tmp.name = strsep(&arg, ","); + if (!(cp = (struct conv *)bsearch(&tmp, clist, + sizeof(clist)/sizeof(struct conv), sizeof(struct conv), + c_conv))) + err("unknown conversion %s", tmp.name); + if (ddflags & cp->noset) + err("%s: illegal conversion combination", tmp.name); + ddflags |= cp->set; + if (cp->ctab) + ctab = cp->ctab; + } +} + +static int +c_conv(a, b) + const void *a, *b; +{ + return (strcmp(((struct conv *)a)->name, ((struct conv *)b)->name)); +} + +/* + * Convert an expression of the following forms to an unsigned long. + * 1) A positive decimal number. + * 2) A positive decimal number followed by a b (mult by 512). + * 3) A positive decimal number followed by a k (mult by 1024). + * 4) A positive decimal number followed by a m (mult by 512). + * 5) A positive decimal number followed by a w (mult by sizeof int) + * 6) Two or more positive decimal numbers (with/without k,b or w). + * seperated by x (also * for backwards compatibility), specifying + * the product of the indicated values. + */ +static u_long +get_bsz(val) + char *val; +{ + char *expr; + u_long num, t; + + num = strtoul(val, &expr, 0); + if (num == ULONG_MAX) /* Overflow. */ + err("%s: %s", oper, strerror(errno)); + if (expr == val) /* No digits. */ + err("%s: illegal numeric value", oper); + + switch(*expr) { + case 'b': + t = num; + num *= 512; + if (t > num) + goto erange; + ++expr; + break; + case 'k': + t = num; + num *= 1024; + if (t > num) + goto erange; + ++expr; + break; + case 'm': + t = num; + num *= 1048576; + if (t > num) + goto erange; + ++expr; + break; + case 'w': + t = num; + num *= sizeof(int); + if (t > num) + goto erange; + ++expr; + break; + } + + switch(*expr) { + case '\0': + break; + case '*': /* Backward compatible. */ + case 'x': + t = num; + num *= get_bsz(expr + 1); + if (t > num) +erange: err("%s: %s", oper, strerror(ERANGE)); + break; + default: + err("%s: illegal numeric value", oper); + } + return(num); +} |