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1.5 ! tedu 1: /* $OpenBSD: diff.c,v 1.4 2003/06/25 03:37:32 deraadt 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);
56:
57: int
58: main(int argc, char **argv)
1.1 deraadt 59: {
1.3 tedu 60: char *argp;
1.1 deraadt 61:
1.3 tedu 62: ifdef1 = "FILE1";
63: ifdef2 = "FILE2";
1.1 deraadt 64: status = 2;
65: diffargv = argv;
66: argc--, argv++;
67: while (argc > 2 && argv[0][0] == '-') {
68: argp = &argv[0][1];
69: argv++, argc--;
1.3 tedu 70: while (*argp)
71: switch (*argp++) {
1.1 deraadt 72: #ifdef notdef
1.3 tedu 73: case 'I':
74: opt = D_IFDEF;
75: wantelses = 0;
76: continue;
77: case 'E':
78: opt = D_IFDEF;
79: wantelses = 1;
80: continue;
81: case '1':
82: opt = D_IFDEF;
83: ifdef1 = argp;
84: *--argp = 0;
85: continue;
1.1 deraadt 86: #endif
1.3 tedu 87: case 'D':
88: /* -Dfoo = -E -1 -2foo */
89: wantelses = 1;
90: ifdef1 = "";
91: /* fall through */
1.1 deraadt 92: #ifdef notdef
1.3 tedu 93: case '2':
1.1 deraadt 94: #endif
1.3 tedu 95: opt = D_IFDEF;
96: ifdef2 = argp;
97: *--argp = 0;
98: continue;
99: case 'e':
100: opt = D_EDIT;
101: continue;
102: case 'f':
103: opt = D_REVERSE;
104: continue;
105: case 'n':
106: opt = D_NREVERSE;
107: continue;
108: case 'b':
109: bflag = 1;
110: continue;
111: case 'w':
112: wflag = 1;
113: continue;
114: case 'i':
115: iflag = 1;
116: continue;
117: case 't':
118: tflag = 1;
119: continue;
120: case 'c':
121: opt = D_CONTEXT;
122: if (isdigit(*argp)) {
123: context = atoi(argp);
124: while (isdigit(*argp))
125: argp++;
126: if (*argp) {
127: fprintf(stderr,
128: "diff: -c: bad count\n");
1.4 deraadt 129: done(0);
1.3 tedu 130: }
131: argp = "";
132: } else
133: context = 3;
134: continue;
135: case 'h':
136: hflag++;
137: continue;
138: case 'S':
139: if (*argp == 0) {
140: fprintf(stderr, "diff: use -Sstart\n");
1.4 deraadt 141: done(0);
1.1 deraadt 142: }
1.3 tedu 143: start = argp;
144: *--argp = 0; /* don't pass it on */
145: continue;
146: case 'r':
147: rflag++;
148: continue;
149: case 's':
150: sflag++;
151: continue;
152: case 'l':
153: lflag++;
154: continue;
155: default:
156: fprintf(stderr, "diff: -%s: unknown option\n",
157: --argp);
1.4 deraadt 158: done(0);
1.1 deraadt 159: }
160: }
161: if (argc != 2) {
162: fprintf(stderr, "diff: two filename arguments required\n");
1.4 deraadt 163: done(0);
1.1 deraadt 164: }
165: file1 = argv[0];
166: file2 = argv[1];
167: if (hflag && opt) {
168: fprintf(stderr,
169: "diff: -h doesn't support -e, -f, -n, -c, or -I\n");
1.4 deraadt 170: done(0);
1.1 deraadt 171: }
172: if (!strcmp(file1, "-"))
173: stb1.st_mode = S_IFREG;
174: else if (stat(file1, &stb1) < 0) {
175: fprintf(stderr, "diff: ");
176: perror(file1);
1.4 deraadt 177: done(0);
1.1 deraadt 178: }
179: if (!strcmp(file2, "-"))
180: stb2.st_mode = S_IFREG;
181: else if (stat(file2, &stb2) < 0) {
182: fprintf(stderr, "diff: ");
183: perror(file2);
1.4 deraadt 184: done(0);
1.1 deraadt 185: }
186: if ((stb1.st_mode & S_IFMT) == S_IFDIR &&
187: (stb2.st_mode & S_IFMT) == S_IFDIR) {
188: diffdir(argv);
189: } else
190: diffreg();
1.4 deraadt 191: done(0);
1.3 tedu 192: /* notreached */
193: return (0);
1.1 deraadt 194: }
195:
1.3 tedu 196: int
197: min(int a, int b)
1.1 deraadt 198: {
199:
200: return (a < b ? a : b);
201: }
202:
1.3 tedu 203: int
204: max(int a, int b)
1.1 deraadt 205: {
206:
207: return (a > b ? a : b);
208: }
209:
1.3 tedu 210: void
1.4 deraadt 211: done(int sig)
1.1 deraadt 212: {
213: if (tempfile)
214: unlink(tempfile);
1.4 deraadt 215: if (sig)
216: _exit(status);
1.1 deraadt 217: exit(status);
1.3 tedu 218: }
1.1 deraadt 219:
1.3 tedu 220: void *
221: talloc(size_t n)
222: {
223: void *p;
224:
225: if ((p = malloc(n)) == NULL)
226: noroom();
227: return (p);
1.1 deraadt 228: }
229:
1.3 tedu 230: void *
231: ralloc(void *p, size_t n)
1.1 deraadt 232: {
1.3 tedu 233: void *q;
1.1 deraadt 234:
1.3 tedu 235: if ((q = realloc(p, n)) == NULL)
1.1 deraadt 236: noroom();
1.3 tedu 237: return (q);
1.1 deraadt 238: }
239:
1.3 tedu 240: static void
241: noroom(void)
1.1 deraadt 242: {
243: fprintf(stderr, "diff: files too big, try -h\n");
1.4 deraadt 244: done(0);
1.1 deraadt 245: }