1 /* $NetBSD: filter.c,v 1.8 2002/05/26 22:41:20 wiz 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 1.8 2002/05/26 22:41:20 wiz Exp $"); 42 #endif /* not lint */ 43 44 #include <sys/param.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 int lexsort(const void *, const void *); 62 int search_ignore(char *); 63 64 /* 65 * Read the file ERRORNAME of the names of functions in lint 66 * to ignore complaints about. 67 */ 68 void 69 getignored(char *auxname) 70 { 71 int i; 72 FILE *fyle; 73 char inbuffer[256]; 74 uid_t uid; 75 char filename[MAXPATHLEN]; 76 char *username; 77 struct passwd *passwdentry; 78 79 nignored = 0; 80 if (auxname == 0){ /* use the default */ 81 if ( (username = (char *)getlogin()) == NULL){ 82 username = "Unknown"; 83 uid = getuid(); 84 if ( (passwdentry = (struct passwd *)getpwuid(uid)) == NULL){ 85 return; 86 } 87 } else { 88 if ( (passwdentry = (struct passwd *)getpwnam(username)) == NULL) 89 return; 90 } 91 strlcpy(filename, passwdentry->pw_dir, sizeof(filename)); 92 (void)strlcat(filename, ERRORNAME, sizeof(filename)); 93 } else 94 (void)strlcpy(filename, auxname, sizeof(filename)); 95 #ifdef FULLDEBUG 96 printf("Opening file \"%s\" to read names to ignore.\n", 97 filename); 98 #endif 99 if ( (fyle = fopen(filename, "r")) == NULL){ 100 #ifdef FULLDEBUG 101 fprintf(stderr, "%s: Can't open file \"%s\"\n", 102 processname, filename); 103 #endif 104 return; 105 } 106 /* 107 * Make the first pass through the file, counting lines 108 */ 109 for (nignored = 0; 110 fgets(inbuffer, sizeof(inbuffer)-1, fyle) != NULL; nignored++) 111 continue; 112 names_ignored = (char **)Calloc(nignored+1, sizeof (char *)); 113 fclose(fyle); 114 if (freopen(filename, "r", fyle) == NULL){ 115 #ifdef FULLDEBUG 116 fprintf(stderr, "%s: Failure to open \"%s\" for second read.\n", 117 processname, filename); 118 #endif 119 nignored = 0; 120 return; 121 } 122 for (i=0; i < nignored && 123 (fgets (inbuffer, sizeof(inbuffer)-1, 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(const void *c1, const void *c2) 138 { 139 char **cpp1, **cpp2; 140 141 cpp1 = (char **)c1; 142 cpp2 = (char **)c2; 143 return(strcmp(*cpp1, *cpp2)); 144 } 145 146 int 147 search_ignore(char *key) 148 { 149 int ub, lb; 150 int halfway; 151 int order; 152 153 if (nignored == 0) 154 return(-1); 155 for(lb = 0, ub = nignored - 1; ub >= lb; ){ 156 halfway = (ub + lb)/2; 157 if ( (order = strcmp(key, names_ignored[halfway])) == 0) 158 return(halfway); 159 if (order < 0) /*key is less than probe, throw away above*/ 160 ub = halfway - 1; 161 else 162 lb = halfway + 1; 163 } 164 return(-1); 165 } 166 167 /* 168 * Tell if the error text is to be ignored. 169 * The error must have been canonicalized, with 170 * the file name the zeroth entry in the errorv, 171 * and the linenumber the second. 172 * Return the new categorization of the error class. 173 */ 174 Errorclass 175 discardit(Eptr errorp) 176 { 177 int language; 178 int i; 179 Errorclass errorclass = errorp->error_e_class; 180 181 switch(errorclass){ 182 case C_SYNC: 183 case C_NONSPEC: 184 case C_UNKNOWN: return(errorclass); 185 default: ; 186 } 187 if(errorp->error_lgtext < 2){ 188 return(C_NONSPEC); 189 } 190 language = errorp->error_language; 191 if(language == INLINT){ 192 if (errorclass != C_NONSPEC){ /* no file */ 193 for(i=0; lint_libs[i] != 0; i++){ 194 if (strcmp(errorp->error_text[0], lint_libs[i]) == 0){ 195 return(C_DISCARD); 196 } 197 } 198 } 199 /* check if the argument to the error message is to be ignored*/ 200 if (ispunct((unsigned char)lastchar(errorp->error_text[2]))) 201 clob_last(errorp->error_text[2], '\0'); 202 if (search_ignore(errorp->error_text[errorclass == C_NONSPEC ? 0 : 2]) >= 0){ 203 return(C_NULLED); 204 } 205 } 206 return(errorclass); 207 } 208