what.c revision 1.15
1/* $NetBSD: what.c,v 1.15 2021/12/07 18:38:50 rillig Exp $ */ 2 3/* 4 * Copyright (c) 1980, 1988, 1993 5 * The Regents of the University of California. 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 must retain the above copyright 11 * 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32#include <sys/cdefs.h> 33#ifndef lint 34__COPYRIGHT("@(#) Copyright (c) 1980, 1988, 1993\ 35 The Regents of the University of California. All rights reserved."); 36#endif /* not lint */ 37 38#ifndef lint 39#if 0 40static char sccsid[] = "@(#)what.c 8.1 (Berkeley) 6/6/93"; 41#endif 42__RCSID("$NetBSD: what.c,v 1.15 2021/12/07 18:38:50 rillig Exp $"); 43#endif /* not lint */ 44 45#include <locale.h> 46#include <err.h> 47#include <stdio.h> 48#include <stdlib.h> 49#include <unistd.h> 50 51static void search(void); 52__dead static void usage(void); 53 54static int matches; 55static int sflag; 56 57/* 58 * what 59 */ 60int 61main(int argc, char **argv) 62{ 63 int c; 64 65 (void)setlocale(LC_ALL, ""); 66 67 matches = sflag = 0; 68 while ((c = getopt(argc, argv, "s")) != -1) { 69 switch (c) { 70 case 's': 71 sflag = 1; 72 break; 73 case '?': 74 default: 75 usage(); 76 } 77 } 78 argc -= optind; 79 argv += optind; 80 81 if (argc < 1) { 82 usage(); 83 } else do { 84 if (freopen(*argv, "r", stdin) == NULL) { 85 warn("Cannot open `%s'", *argv); 86 break; 87 } 88 printf("%s:\n", *argv); 89 search(); 90 } while (*++argv != NULL); 91 92 /* Note: the standard explicitly specifies an exit status of 0/1. */ 93 return matches ? 0 : 1; 94} 95 96static void 97search(void) 98{ 99 int c; 100 101 while ((c = getchar()) != EOF) { 102loop: if (c != '@') 103 continue; 104 if ((c = getchar()) != '(') 105 goto loop; 106 if ((c = getchar()) != '#') 107 goto loop; 108 if ((c = getchar()) != ')') 109 goto loop; 110 putchar('\t'); 111 while ((c = getchar()) != EOF && c != '\0' && c != '"' && 112 c != '>' && c != '\n' && c != '\\') 113 putchar(c); 114 putchar('\n'); 115 matches++; 116 if (sflag) 117 break; 118 } 119} 120 121static void 122usage(void) 123{ 124 125 (void)fprintf(stderr, "Usage: %s [-s] file ...\n", getprogname()); 126 exit(1); 127} 128