1 /* 2 * Copyright (c) 1980, 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 36 __FBSDID("$FreeBSD$"); 37 38 #ifndef lint 39 static const char copyright[] = 40 "@(#) Copyright (c) 1980, 1988, 1993\n\ 41 The Regents of the University of California. All rights reserved.\n"; 42 #endif 43 44 #ifndef lint 45 static const char sccsid[] = "@(#)what.c 8.1 (Berkeley) 6/6/93"; 46 #endif 47 48 #include <err.h> 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <unistd.h> 52 53 static int sflag; 54 static int found; 55 56 void search(void); 57 static void usage(void); 58 59 /* 60 * what 61 */ 62 int 63 main(int argc, char **argv) 64 { 65 int c; 66 67 while ((c = getopt(argc, argv, "s")) != -1) 68 switch (c) { 69 case 's': 70 sflag = 1; 71 break; 72 default: 73 usage(); 74 } 75 argv += optind; 76 77 if (!*argv) 78 search(); 79 else do { 80 if (!freopen(*argv, "r", stdin)) 81 warn("%s", *argv); 82 else { 83 printf("%s:\n", *argv); 84 search(); 85 } 86 } while(*++argv); 87 exit(!found); 88 } 89 90 static void 91 usage(void) 92 { 93 (void)fprintf(stderr, "usage: what [-s] [file ...]\n"); 94 exit(1); 95 } 96 97 void 98 search(void) 99 { 100 int c; 101 102 while ((c = getchar()) != EOF) { 103 loop: if (c != '@') 104 continue; 105 if ((c = getchar()) != '(') 106 goto loop; 107 if ((c = getchar()) != '#') 108 goto loop; 109 if ((c = getchar()) != ')') 110 goto loop; 111 putchar('\t'); 112 while ((c = getchar()) != EOF && c && c != '"' && 113 c != '>' && c != '\\' && c != '\n') 114 putchar(c); 115 putchar('\n'); 116 found = 1; 117 if (sflag) 118 return; 119 } 120 } 121