Annotation of src/usr.bin/diff/diff.c, Revision 1.6
1.6 ! millert 1: /* $OpenBSD: diff.c,v 1.5 2003/06/25 07:26:59 tedu Exp $ */
1.2 deraadt 2:
3: /*
4: * Copyright (C) Caldera International Inc. 2001-2002.
5: * All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code and documentation must retain the above
11: * copyright notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: * 3. All advertising materials mentioning features or use of this software
16: * must display the following acknowledgement:
17: * This product includes software developed or owned by Caldera
18: * International, Inc.
19: * 4. Neither the name of Caldera International, Inc. nor the names of other
20: * contributors may be used to endorse or promote products derived from
21: * this software without specific prior written permission.
22: *
23: * USE OF THE SOFTWARE PROVIDED FOR UNDER THIS LICENSE BY CALDERA
24: * INTERNATIONAL, INC. AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR
25: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
26: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27: * IN NO EVENT SHALL CALDERA INTERNATIONAL, INC. BE LIABLE FOR ANY DIRECT,
28: * INDIRECT INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
29: * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
30: * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
32: * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
33: * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34: * POSSIBILITY OF SUCH DAMAGE.
35: */
36:
1.3 tedu 37: #include <stdlib.h>
38: #include <unistd.h>
1.1 deraadt 39:
40: #include "diff.h"
41: #include "pathnames.h"
42:
1.3 tedu 43: #if 0
44: static char const sccsid[] = "@(#)diff.c 4.7 5/11/89";
45: #endif
46:
1.1 deraadt 47: /*
48: * diff - driver and subroutines
49: */
50:
1.3 tedu 51: char diff[] = _PATH_DIFF;
52: char diffh[] = _PATH_DIFFH;
53: char pr[] = _PATH_PR;
1.1 deraadt 54:
1.3 tedu 55: static void noroom(void);
1.6 ! millert 56: __dead void usage(void);
1.3 tedu 57:
58: int
59: main(int argc, char **argv)
1.1 deraadt 60: {
1.6 ! millert 61: int ch;
1.1 deraadt 62:
1.3 tedu 63: ifdef1 = "FILE1";
64: ifdef2 = "FILE2";
1.1 deraadt 65: status = 2;
66: diffargv = argv;
1.6 ! millert 67:
! 68: while ((ch = getopt(argc, argv, "bC:cDefhilnrS:stw")) != -1) {
! 69: switch (ch) {
! 70: case 'b':
! 71: bflag++;
! 72: break;
! 73: case 'C':
! 74: opt = D_CONTEXT;
! 75: if (!isdigit(*optarg))
! 76: usage();
! 77: context = atoi(optarg); /* XXX - use strtol */
! 78: break;
! 79: case 'c':
! 80: opt = D_CONTEXT;
! 81: context = 3;
! 82: break;
! 83: case 'D':
! 84: /* -Dfoo = -E -1 -2foo */
! 85: opt = D_IFDEF;
! 86: ifdef1 = "";
! 87: ifdef2 = optarg;
! 88: wantelses++;
! 89: break;
! 90: case 'e':
! 91: opt = D_EDIT;
! 92: break;
! 93: case 'f':
! 94: opt = D_REVERSE;
! 95: break;
! 96: case 'h':
! 97: hflag++;
! 98: break;
! 99: case 'i':
! 100: iflag++;
! 101: break;
! 102: case 'l':
! 103: lflag++;
! 104: break;
! 105: case 'n':
! 106: opt = D_NREVERSE;
! 107: break;
! 108: case 'r':
! 109: opt = D_REVERSE;
! 110: break;
! 111: case 'S':
! 112: start = optarg;
! 113: break;
! 114: case 's':
! 115: sflag++;
! 116: break;
! 117: case 't':
! 118: tflag++;
! 119: break;
! 120: case 'w':
! 121: wflag++;
! 122: break;
! 123: default:
! 124: usage();
! 125: break;
! 126: }
1.1 deraadt 127: }
1.6 ! millert 128: argc -= optind;
! 129: argv += optind;
! 130:
! 131: if (argc != 2)
! 132: errx(1, "two filename arguments required");
1.1 deraadt 133: file1 = argv[0];
134: file2 = argv[1];
1.6 ! millert 135: if (hflag && opt)
! 136: errx(1, "-h doesn't support -D, -c, -C, -e, -f, -I or -n");
1.1 deraadt 137: if (!strcmp(file1, "-"))
138: stb1.st_mode = S_IFREG;
1.6 ! millert 139: else if (stat(file1, &stb1) < 0)
! 140: err(1, "%s", file1);
1.1 deraadt 141: if (!strcmp(file2, "-"))
142: stb2.st_mode = S_IFREG;
1.6 ! millert 143: else if (stat(file2, &stb2) < 0)
! 144: err(1, "%s", file2);
1.1 deraadt 145: if ((stb1.st_mode & S_IFMT) == S_IFDIR &&
146: (stb2.st_mode & S_IFMT) == S_IFDIR) {
147: diffdir(argv);
148: } else
149: diffreg();
1.4 deraadt 150: done(0);
1.1 deraadt 151: }
152:
1.3 tedu 153: int
154: min(int a, int b)
1.1 deraadt 155: {
156:
157: return (a < b ? a : b);
158: }
159:
1.3 tedu 160: int
161: max(int a, int b)
1.1 deraadt 162: {
163:
164: return (a > b ? a : b);
165: }
166:
1.6 ! millert 167: __dead void
1.4 deraadt 168: done(int sig)
1.1 deraadt 169: {
170: if (tempfile)
171: unlink(tempfile);
1.4 deraadt 172: if (sig)
173: _exit(status);
1.1 deraadt 174: exit(status);
1.3 tedu 175: }
1.1 deraadt 176:
1.3 tedu 177: void *
178: talloc(size_t n)
179: {
180: void *p;
181:
182: if ((p = malloc(n)) == NULL)
183: noroom();
184: return (p);
1.1 deraadt 185: }
186:
1.3 tedu 187: void *
188: ralloc(void *p, size_t n)
1.1 deraadt 189: {
1.3 tedu 190: void *q;
1.1 deraadt 191:
1.3 tedu 192: if ((q = realloc(p, n)) == NULL)
1.1 deraadt 193: noroom();
1.3 tedu 194: return (q);
1.1 deraadt 195: }
196:
1.3 tedu 197: static void
198: noroom(void)
1.1 deraadt 199: {
1.6 ! millert 200: warn("files too big, try -h");
1.4 deraadt 201: done(0);
1.6 ! millert 202: }
! 203:
! 204: __dead void
! 205: usage(void)
! 206: {
! 207: (void)fprintf(stderr, "usage: diff [-c | -C lines | -e | -f | -h | -n ] [-biwt] file1 file2\n"
! 208: "usage: diff [-Dstring] [-biw] file1 file2\n"
! 209: "usage: diff [-l] [-r] [-s] [-c | -C lines | -e | -f | -h | -n ] [-biwt]\n [-Sname] dir1 dir2\n");
! 210:
! 211: exit(1);
1.1 deraadt 212: }
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