1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 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 34 __FBSDID("$FreeBSD$"); 35 36 #ifndef lint 37 static const char copyright[] = 38 "@(#) Copyright (c) 1980, 1988, 1993\n\ 39 The Regents of the University of California. All rights reserved.\n"; 40 #endif 41 42 #ifndef lint 43 static const char sccsid[] = "@(#)what.c 8.1 (Berkeley) 6/6/93"; 44 #endif 45 46 #include <err.h> 47 #include <stdbool.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <unistd.h> 51 52 static void usage(void) __dead2; 53 static bool search(bool, bool, FILE *); 54 55 int 56 main(int argc, char *argv[]) 57 { 58 const char *file; 59 FILE *in; 60 bool found, qflag, sflag; 61 int c; 62 63 qflag = sflag = false; 64 65 while ((c = getopt(argc, argv, "qs")) != -1) { 66 switch (c) { 67 case 'q': 68 qflag = true; 69 break; 70 case 's': 71 sflag = true; 72 break; 73 default: 74 usage(); 75 } 76 } 77 argc -= optind; 78 argv += optind; 79 80 found = false; 81 82 if (argc == 0) { 83 if (search(sflag, qflag, stdin)) 84 found = true; 85 } else { 86 while (argc--) { 87 file = *argv++; 88 in = fopen(file, "r"); 89 if (in == NULL) { 90 if (!qflag) 91 warn("%s", file); 92 continue; 93 } 94 if (!qflag) 95 printf("%s:\n", file); 96 if (search(sflag, qflag, in)) 97 found = true; 98 fclose(in); 99 } 100 } 101 exit(found ? 0 : 1); 102 } 103 104 static void 105 usage(void) 106 { 107 fprintf(stderr, "usage: what [-qs] [file ...]\n"); 108 exit(1); 109 } 110 111 bool 112 search(bool one, bool quiet, FILE *in) 113 { 114 bool found; 115 int c; 116 117 found = false; 118 119 while ((c = getc(in)) != EOF) { 120 loop: if (c != '@') 121 continue; 122 if ((c = getc(in)) != '(') 123 goto loop; 124 if ((c = getc(in)) != '#') 125 goto loop; 126 if ((c = getc(in)) != ')') 127 goto loop; 128 if (!quiet) 129 putchar('\t'); 130 while ((c = getc(in)) != EOF && c && c != '"' && 131 c != '>' && c != '\\' && c != '\n') 132 putchar(c); 133 putchar('\n'); 134 found = true; 135 if (one) 136 break; 137 } 138 return (found); 139 } 140