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