1 /* $NetBSD: filter.c,v 1.5 1998/11/06 23:10:08 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1980, 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)filter.c 8.1 (Berkeley) 6/6/93"; 40 #endif 41 __RCSID("$NetBSD: filter.c,v 1.5 1998/11/06 23:10:08 christos Exp $"); 42 #endif /* not lint */ 43 44 #include <sys/types.h> 45 #include <pwd.h> 46 #include <unistd.h> 47 #include <stdio.h> 48 #include <ctype.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #include "error.h" 52 #include "pathnames.h" 53 54 char *lint_libs[] = { 55 IG_FILE1, 56 IG_FILE2, 57 IG_FILE3, 58 IG_FILE4, 59 0 60 }; 61 extern char* processname; 62 int lexsort __P((const void *, const void *)); 63 int search_ignore __P((char *)); 64 65 /* 66 * Read the file ERRORNAME of the names of functions in lint 67 * to ignore complaints about. 68 */ 69 void 70 getignored(auxname) 71 char *auxname; 72 { 73 int i; 74 FILE *fyle; 75 char inbuffer[256]; 76 int uid; 77 char filename[128]; 78 char *username; 79 struct passwd *passwdentry; 80 81 nignored = 0; 82 if (auxname == 0){ /* use the default */ 83 if ( (username = (char *)getlogin()) == NULL){ 84 username = "Unknown"; 85 uid = getuid(); 86 if ( (passwdentry = (struct passwd *)getpwuid(uid)) == NULL){ 87 return; 88 } 89 } else { 90 if ( (passwdentry = (struct passwd *)getpwnam(username)) == NULL) 91 return; 92 } 93 strcpy(filename, passwdentry->pw_dir); 94 (void)strcat(filename, ERRORNAME); 95 } else 96 (void)strcpy(filename, auxname); 97 #ifdef FULLDEBUG 98 printf("Opening file \"%s\" to read names to ignore.\n", 99 filename); 100 #endif 101 if ( (fyle = fopen(filename, "r")) == NULL){ 102 #ifdef FULLDEBUG 103 fprintf(stderr, "%s: Can't open file \"%s\"\n", 104 processname, filename); 105 #endif 106 return; 107 } 108 /* 109 * Make the first pass through the file, counting lines 110 */ 111 for (nignored = 0; fgets(inbuffer, 255, fyle) != NULL; nignored++) 112 continue; 113 names_ignored = (char **)Calloc(nignored+1, sizeof (char *)); 114 fclose(fyle); 115 if (freopen(filename, "r", fyle) == NULL){ 116 #ifdef FULLDEBUG 117 fprintf(stderr, "%s: Failure to open \"%s\" for second read.\n", 118 processname, filename); 119 #endif 120 nignored = 0; 121 return; 122 } 123 for (i=0; i < nignored && (fgets (inbuffer, 255, fyle) != NULL); i++){ 124 names_ignored[i] = strsave(inbuffer); 125 (void)substitute(names_ignored[i], '\n', '\0'); 126 } 127 qsort(names_ignored, nignored, sizeof *names_ignored, lexsort); 128 #ifdef FULLDEBUG 129 printf("Names to ignore follow.\n"); 130 for (i=0; i < nignored; i++){ 131 printf("\tIgnore: %s\n", names_ignored[i]); 132 } 133 #endif 134 } 135 136 int 137 lexsort(c1, c2) 138 const void *c1, *c2; 139 { 140 char **cpp1, **cpp2; 141 142 cpp1 = (char **)c1; 143 cpp2 = (char **)c2; 144 return(strcmp(*cpp1, *cpp2)); 145 } 146 147 int 148 search_ignore(key) 149 char *key; 150 { 151 int ub, lb; 152 int halfway; 153 int order; 154 155 if (nignored == 0) 156 return(-1); 157 for(lb = 0, ub = nignored - 1; ub >= lb; ){ 158 halfway = (ub + lb)/2; 159 if ( (order = strcmp(key, names_ignored[halfway])) == 0) 160 return(halfway); 161 if (order < 0) /*key is less than probe, throw away above*/ 162 ub = halfway - 1; 163 else 164 lb = halfway + 1; 165 } 166 return(-1); 167 } 168 169 /* 170 * Tell if the error text is to be ignored. 171 * The error must have been canonicalized, with 172 * the file name the zeroth entry in the errorv, 173 * and the linenumber the second. 174 * Return the new categorization of the error class. 175 */ 176 Errorclass 177 discardit(errorp) 178 Eptr errorp; 179 { 180 int language; 181 int i; 182 Errorclass errorclass = errorp->error_e_class; 183 184 switch(errorclass){ 185 case C_SYNC: 186 case C_NONSPEC: 187 case C_UNKNOWN: return(errorclass); 188 default: ; 189 } 190 if(errorp->error_lgtext < 2){ 191 return(C_NONSPEC); 192 } 193 language = errorp->error_language; 194 if(language == INLINT){ 195 if (errorclass != C_NONSPEC){ /* no file */ 196 for(i=0; lint_libs[i] != 0; i++){ 197 if (strcmp(errorp->error_text[0], lint_libs[i]) == 0){ 198 return(C_DISCARD); 199 } 200 } 201 } 202 /* check if the argument to the error message is to be ignored*/ 203 if (ispunct((unsigned char)lastchar(errorp->error_text[2]))) 204 clob_last(errorp->error_text[2], '\0'); 205 if (search_ignore(errorp->error_text[errorclass == C_NONSPEC ? 0 : 2]) >= 0){ 206 return(C_NULLED); 207 } 208 } 209 return(errorclass); 210 } 211