1 /* 2 * Copyright (c) 1989, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Case Larsen. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #ifndef lint 38 static const char copyright[] = "@(#) Copyright (c) 1989, 1993, 1994\n The Regents of the University of California. All rights reserved.\n"; 39 #endif 40 41 #if 1 42 #ifndef lint 43 static char sccsid[] = "From: @(#)comm.c 8.4 (Berkeley) 5/4/95"; 44 #endif 45 #endif 46 47 //#include <cdefs.h> 48 //__FBSDID("$FreeBSD: /repoman/r/ncvs/src/usr.bin/comm/comm.c,v 1.20 2002/07/28 15:28:38 dwmalone Exp $"); 49 50 #include <ctype.h> 51 //#include <err.h> 52 #include <limits.h> 53 #include <locale.h> 54 #include <stdio.h> 55 #include <stdlib.h> 56 #include <string.h> 57 #include <unistd.h> 58 #define LINE_MAX 99999 59 #define MAXLINELEN (LINE_MAX + 1) 60 61 const char *tabs[] = { "", "\t", "\t\t" }; 62 63 FILE *file(const char *); 64 void show(FILE *, const char *, char *); 65 int stricoll(const char *, const char *); 66 static void usage(void); 67 static void printversion(void); 68 69 int 70 main(int argc, char *argv[]) 71 { 72 int comp, file1done = 0, file2done = 0, read1, read2; 73 int ch, flag1, flag2, flag3, iflag; 74 FILE *fp1, *fp2; 75 const char *col1, *col2, *col3; 76 char line1[MAXLINELEN], line2[MAXLINELEN]; 77 const char **p; 78 79 flag1 = flag2 = flag3 = 1; 80 iflag = 0; 81 82 (void) setlocale(LC_ALL, ""); 83 84 while ((ch = getopt(argc, argv, "123ivh")) != -1) 85 switch(ch) { 86 case '1': 87 flag1 = 0; 88 break; 89 case '2': 90 flag2 = 0; 91 break; 92 case '3': 93 flag3 = 0; 94 break; 95 case 'i': 96 iflag = 1; 97 break; 98 case 'v': 99 printversion(); 100 break; 101 default: 102 usage(); 103 } 104 105 argc -= optind; 106 argv += optind; 107 108 if (argc != 2) 109 usage(); 110 111 fp1 = file(argv[0]); 112 fp2 = file(argv[1]); 113 114 /* for each column printed, add another tab offset */ 115 p = tabs; 116 col1 = col2 = col3 = NULL; 117 if (flag1) 118 col1 = *p++; 119 if (flag2) 120 col2 = *p++; 121 if (flag3) 122 col3 = *p; 123 124 for (read1 = read2 = 1;;) { 125 /* read next line, check for EOF */ 126 if (read1) 127 file1done = !fgets(line1, MAXLINELEN, fp1); 128 if (read2) 129 file2done = !fgets(line2, MAXLINELEN, fp2); 130 131 /* if one file done, display the rest of the other file */ 132 if (file1done) { 133 if (!file2done && col2) 134 show(fp2, col2, line2); 135 break; 136 } 137 if (file2done) { 138 if (!file1done && col1) 139 show(fp1, col1, line1); 140 break; 141 } 142 143 /* lines are the same */ 144 if(iflag) 145 comp = stricoll(line1, line2); 146 else 147 comp = strcoll(line1, line2); 148 149 if (!comp) { 150 read1 = read2 = 1; 151 if (col3) 152 (void)printf("%s%s", col3, line1); 153 continue; 154 } 155 156 /* lines are different */ 157 if (comp < 0) { 158 read1 = 1; 159 read2 = 0; 160 if (col1) 161 (void)printf("%s%s", col1, line1); 162 } else { 163 read1 = 0; 164 read2 = 1; 165 if (col2) 166 (void)printf("%s%s", col2, line2); 167 } 168 } 169 exit(0); 170 } 171 172 void 173 show(FILE *fp, const char *offset, char *buf) 174 { 175 176 do { 177 (void)printf("%s%s", offset, buf); 178 } while (fgets(buf, MAXLINELEN, fp)); 179 } 180 181 FILE * 182 file(const char *name) 183 { 184 FILE *fp; 185 186 if (!strcmp(name, "-")) 187 return (stdin); 188 if ((fp = fopen(name, "r")) == NULL) { 189 sprintf("%s", name); 190 } 191 return (fp); 192 } 193 194 static void 195 usage(void) 196 { 197 (void)fprintf(stderr, "Usage: /bin/comm [OPTION]... LEFT_FILE RIGHT_FILE 198 Compare sorted files LEFT_FILE and RIGHT_FILE line by line. 199 200 -1 suppress lines unique to left file 201 -2 suppress lines unique to right file 202 -3 suppress lines unique to both files 203 -help display this help and exit 204 -version output version information and exit 205 "); 206 exit(1); 207 } 208 209 static void 210 printversion(void) 211 { 212 (void)fprintf(stderr, copyright); 213 (void)fprintf(stderr, "\nVersion : %s\n", sccsid); 214 exit(1); 215 } 216 217 int 218 stricoll(const char *s1, const char *s2) 219 { 220 char *p, line1[MAXLINELEN], line2[MAXLINELEN]; 221 222 for (p = line1; *s1; s1++) 223 *p++ = tolower((unsigned char)*s1); 224 *p = '\0'; 225 for (p = line2; *s2; s2++) 226 *p++ = tolower((unsigned char)*s2); 227 *p = '\0'; 228 return strcoll(line1, line2); 229 } 230 231