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