1139790Simp/*- 296888Smarcel * SPDX-License-Identifier: BSD-3-Clause 396888Smarcel * 496888Smarcel * Copyright (c) 1989, 1993, 1994 596888Smarcel * The Regents of the University of California. All rights reserved. 696888Smarcel * 796888Smarcel * This code is derived from software contributed to Berkeley by 896888Smarcel * Case Larsen. 996888Smarcel * 1096888Smarcel * Redistribution and use in source and binary forms, with or without 1196888Smarcel * modification, are permitted provided that the following conditions 1296888Smarcel * are met: 1396888Smarcel * 1. Redistributions of source code must retain the above copyright 1496888Smarcel * notice, this list of conditions and the following disclaimer. 1596888Smarcel * 2. Redistributions in binary form must reproduce the above copyright 1696888Smarcel * notice, this list of conditions and the following disclaimer in the 1796888Smarcel * documentation and/or other materials provided with the distribution. 1896888Smarcel * 3. Neither the name of the University nor the names of its contributors 1996888Smarcel * may be used to endorse or promote products derived from this software 2096888Smarcel * without specific prior written permission. 2196888Smarcel * 2296888Smarcel * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2396888Smarcel * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2496888Smarcel * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2596888Smarcel * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2696888Smarcel * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2796888Smarcel * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2896888Smarcel * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29115705Sobrien * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30115705Sobrien * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31115705Sobrien * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32103064Speter * SUCH DAMAGE. 33103064Speter */ 3496888Smarcel 3596888Smarcel#include <err.h> 3696888Smarcel#include <limits.h> 3796888Smarcel#include <locale.h> 3896888Smarcel#include <stdint.h> 39102946Siedowse#include <stdio.h> 40103352Sbde#include <stdlib.h> 4196888Smarcel#include <string.h> 4296888Smarcel#include <unistd.h> 43103073Sbde#include <wchar.h> 4496888Smarcel#include <wctype.h> 4596888Smarcel 4696888Smarcelstatic int iflag; 4796888Smarcelstatic const char *tabs[] = { "", "\t", "\t\t" }; 48246085Sjhb 4996888Smarcelstatic FILE *file(const char *); 50147741Sdelphijstatic wchar_t *convert(const char *); 51103064Speterstatic void show(FILE *, const char *, const char *, char **, size_t *); 52103064Speterstatic void usage(void); 53103064Speter 5496888Smarcelint 5596888Smarcelmain(int argc, char *argv[]) 5696888Smarcel{ 5796888Smarcel int comp, read1, read2; 5896888Smarcel int ch, flag1, flag2, flag3; 5996888Smarcel FILE *fp1, *fp2; 6096888Smarcel const char *col1, *col2, *col3; 6196888Smarcel size_t line1len, line2len; 6296888Smarcel char *line1, *line2; 6396888Smarcel ssize_t n1, n2; 6496888Smarcel wchar_t *tline1, *tline2; 6596888Smarcel const char **p; 6696888Smarcel 6796888Smarcel (void) setlocale(LC_ALL, ""); 6896888Smarcel 6996888Smarcel flag1 = flag2 = flag3 = 1; 7096888Smarcel 7196888Smarcel while ((ch = getopt(argc, argv, "123i")) != -1) 72304188Sjhb switch(ch) { 7396888Smarcel case '1': 7496888Smarcel flag1 = 0; 7596888Smarcel break; 7696888Smarcel case '2': 7796888Smarcel flag2 = 0; 7896888Smarcel break; 7996888Smarcel case '3': 8096888Smarcel flag3 = 0; 8196888Smarcel break; 8296888Smarcel case 'i': 8396888Smarcel iflag = 1; 8496888Smarcel break; 8596888Smarcel case '?': 8696888Smarcel default: 8796888Smarcel usage(); 8896888Smarcel } 8996888Smarcel argc -= optind; 90131575Sstefanf argv += optind; 9196888Smarcel 9296888Smarcel if (argc != 2) 9396888Smarcel usage(); 94293575Sdchagin 9596888Smarcel fp1 = file(argv[0]); 9696888Smarcel fp2 = file(argv[1]); 9796888Smarcel 9896888Smarcel /* for each column printed, add another tab offset */ 9996888Smarcel p = tabs; 10096888Smarcel col1 = col2 = col3 = NULL; 10196888Smarcel if (flag1) 10296888Smarcel col1 = *p++; 10396888Smarcel if (flag2) 10496888Smarcel col2 = *p++; 10596888Smarcel if (flag3) 10696888Smarcel col3 = *p; 10796888Smarcel 10896888Smarcel line1len = line2len = 0; 10996888Smarcel line1 = line2 = NULL; 11096888Smarcel n1 = n2 = -1; 11196888Smarcel 11296888Smarcel for (read1 = read2 = 1;;) { 11396888Smarcel /* read next line, check for EOF */ 11496888Smarcel if (read1) { 11596888Smarcel n1 = getline(&line1, &line1len, fp1); 11696888Smarcel if (n1 < 0 && ferror(fp1)) 11796888Smarcel err(1, "%s", argv[0]); 11896888Smarcel if (n1 > 0 && line1[n1 - 1] == '\n') 11996888Smarcel line1[n1 - 1] = '\0'; 12096888Smarcel 12196888Smarcel } 12296888Smarcel if (read2) { 12396888Smarcel n2 = getline(&line2, &line2len, fp2); 12496888Smarcel if (n2 < 0 && ferror(fp2)) 12596888Smarcel err(1, "%s", argv[1]); 12696888Smarcel if (n2 > 0 && line2[n2 - 1] == '\n') 12796888Smarcel line2[n2 - 1] = '\0'; 12896888Smarcel } 12996888Smarcel 13096888Smarcel /* if one file done, display the rest of the other file */ 13196888Smarcel if (n1 < 0) { 13296888Smarcel if (n2 >= 0 && col2 != NULL) 13396888Smarcel show(fp2, argv[1], col2, &line2, &line2len); 13496888Smarcel break; 13596888Smarcel } 13696888Smarcel if (n2 < 0) { 13796888Smarcel if (n1 >= 0 && col1 != NULL) 13896888Smarcel show(fp1, argv[0], col1, &line1, &line1len); 13996888Smarcel break; 14096888Smarcel } 14196888Smarcel 14296888Smarcel tline2 = NULL; 14396888Smarcel if ((tline1 = convert(line1)) != NULL) 14496888Smarcel tline2 = convert(line2); 14596888Smarcel if (tline1 == NULL || tline2 == NULL) 14696888Smarcel comp = strcmp(line1, line2); 14796888Smarcel else 14896888Smarcel comp = wcscoll(tline1, tline2); 14996888Smarcel if (tline1 != NULL) 15096888Smarcel free(tline1); 15196888Smarcel if (tline2 != NULL) 15296888Smarcel free(tline2); 15396888Smarcel 15496888Smarcel /* lines are the same */ 15596888Smarcel if (!comp) { 15696888Smarcel read1 = read2 = 1; 15796888Smarcel if (col3 != NULL) 15896888Smarcel (void)printf("%s%s\n", col3, line1); 15996888Smarcel continue; 16096888Smarcel } 16196888Smarcel 16296888Smarcel /* lines are different */ 16396888Smarcel if (comp < 0) { 16496888Smarcel read1 = 1; 16596888Smarcel read2 = 0; 16696888Smarcel if (col1 != NULL) 16796888Smarcel (void)printf("%s%s\n", col1, line1); 16896888Smarcel } else { 16996888Smarcel read1 = 0; 17096888Smarcel read2 = 1; 17196888Smarcel if (col2 != NULL) 17296888Smarcel (void)printf("%s%s\n", col2, line2); 17396888Smarcel } 17496888Smarcel } 17596888Smarcel exit(0); 17696888Smarcel} 17796888Smarcel 17896888Smarcelstatic wchar_t * 17996888Smarcelconvert(const char *str) 18096888Smarcel{ 18196888Smarcel size_t n; 18296888Smarcel wchar_t *buf, *p; 18396888Smarcel 18496888Smarcel if ((n = mbstowcs(NULL, str, 0)) == (size_t)-1) 18596888Smarcel return (NULL); 18696888Smarcel if (SIZE_MAX / sizeof(*buf) < n + 1) 18796888Smarcel errx(1, "conversion buffer length overflow"); 18896888Smarcel if ((buf = malloc((n + 1) * sizeof(*buf))) == NULL) 18996888Smarcel err(1, "malloc"); 19096888Smarcel if (mbstowcs(buf, str, n + 1) != n) 19196888Smarcel errx(1, "internal mbstowcs() error"); 19296888Smarcel 19396888Smarcel if (iflag) { 19496888Smarcel for (p = buf; *p != L'\0'; p++) 19596888Smarcel *p = towlower(*p); 19696888Smarcel } 19796888Smarcel 19896888Smarcel return (buf); 19996888Smarcel} 20096888Smarcel 20196888Smarcelstatic void 20296888Smarcelshow(FILE *fp, const char *fn, const char *offset, char **bufp, size_t *buflenp) 20396888Smarcel{ 20496888Smarcel ssize_t n; 20596888Smarcel 20696888Smarcel do { 20796888Smarcel (void)printf("%s%s\n", offset, *bufp); 20896888Smarcel if ((n = getline(bufp, buflenp, fp)) < 0) 20996888Smarcel break; 21096888Smarcel if (n > 0 && (*bufp)[n - 1] == '\n') 21196888Smarcel (*bufp)[n - 1] = '\0'; 21296888Smarcel } while (1); 21396888Smarcel if (ferror(fp)) 21496888Smarcel err(1, "%s", fn); 21596888Smarcel} 21696888Smarcel 21796888Smarcelstatic FILE * 21896888Smarcelfile(const char *name) 21996888Smarcel{ 22096888Smarcel FILE *fp; 22196888Smarcel 22296888Smarcel if (!strcmp(name, "-")) 22396888Smarcel return (stdin); 224113868Sjhb if ((fp = fopen(name, "r")) == NULL) { 225172207Sjeff err(1, "%s", name); 226113868Sjhb } 227276084Sjhb return (fp); 228113868Sjhb} 22996888Smarcel 23096888Smarcelstatic void 23196888Smarcelusage(void) 23296888Smarcel{ 23396888Smarcel (void)fprintf(stderr, "usage: comm [-123i] file1 file2\n"); 23496888Smarcel exit(1); 235113868Sjhb} 236172207Sjeff