Annotation of src/usr.bin/diff/diff.c, Revision 1.8
1.8 ! millert 1: /* $OpenBSD: diff.c,v 1.7 2003/06/25 19:56:57 millert 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:
1.7 millert 68: while ((ch = getopt(argc, argv, "bC:cD:efhilnrS:stw")) != -1) {
1.6 millert 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);
1.8 ! millert 145: if (S_ISDIR(stb1.st_mode) && S_ISDIR(stb2.st_mode))
1.1 deraadt 146: diffdir(argv);
1.8 ! millert 147: else
1.1 deraadt 148: diffreg();
1.4 deraadt 149: done(0);
1.1 deraadt 150: }
151:
1.3 tedu 152: int
153: min(int a, int b)
1.1 deraadt 154: {
155:
156: return (a < b ? a : b);
157: }
158:
1.3 tedu 159: int
160: max(int a, int b)
1.1 deraadt 161: {
162:
163: return (a > b ? a : b);
164: }
165:
1.6 millert 166: __dead void
1.4 deraadt 167: done(int sig)
1.1 deraadt 168: {
169: if (tempfile)
170: unlink(tempfile);
1.4 deraadt 171: if (sig)
172: _exit(status);
1.1 deraadt 173: exit(status);
1.3 tedu 174: }
1.1 deraadt 175:
1.3 tedu 176: void *
1.8 ! millert 177: emalloc(size_t n)
1.3 tedu 178: {
179: void *p;
180:
181: if ((p = malloc(n)) == NULL)
182: noroom();
183: return (p);
1.1 deraadt 184: }
185:
1.3 tedu 186: void *
1.8 ! millert 187: erealloc(void *p, size_t n)
1.1 deraadt 188: {
1.3 tedu 189: void *q;
1.1 deraadt 190:
1.3 tedu 191: if ((q = realloc(p, n)) == NULL)
1.1 deraadt 192: noroom();
1.3 tedu 193: return (q);
1.1 deraadt 194: }
195:
1.3 tedu 196: static void
197: noroom(void)
1.1 deraadt 198: {
1.6 millert 199: warn("files too big, try -h");
1.4 deraadt 200: done(0);
1.6 millert 201: }
202:
203: __dead void
204: usage(void)
205: {
206: (void)fprintf(stderr, "usage: diff [-c | -C lines | -e | -f | -h | -n ] [-biwt] file1 file2\n"
207: "usage: diff [-Dstring] [-biw] file1 file2\n"
208: "usage: diff [-l] [-r] [-s] [-c | -C lines | -e | -f | -h | -n ] [-biwt]\n [-Sname] dir1 dir2\n");
209:
210: exit(1);
1.1 deraadt 211: }
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