1 /* $NetBSD: filter.c,v 1.10 2003/08/07 11:13:37 agc 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. 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 #include <sys/cdefs.h> 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)filter.c 8.1 (Berkeley) 6/6/93"; 36 #endif 37 __RCSID("$NetBSD: filter.c,v 1.10 2003/08/07 11:13:37 agc Exp $"); 38 #endif /* not lint */ 39 40 #include <sys/param.h> 41 #include <pwd.h> 42 #include <unistd.h> 43 #include <stdio.h> 44 #include <ctype.h> 45 #include <stdlib.h> 46 #include <string.h> 47 #include "error.h" 48 #include "pathnames.h" 49 50 char *lint_libs[] = { 51 IG_FILE1, 52 IG_FILE2, 53 IG_FILE3, 54 IG_FILE4, 55 0 56 }; 57 int lexsort(const void *, const void *); 58 int search_ignore(char *); 59 60 /* 61 * Read the file ERRORNAME of the names of functions in lint 62 * to ignore complaints about. 63 */ 64 void 65 getignored(char *auxname) 66 { 67 int i; 68 FILE *fyle; 69 char inbuffer[256]; 70 uid_t uid; 71 char filename[MAXPATHLEN]; 72 char *username; 73 struct passwd *passwdentry; 74 75 nignored = 0; 76 if (auxname == 0){ /* use the default */ 77 if ( (username = (char *)getlogin()) == NULL){ 78 username = "Unknown"; 79 uid = getuid(); 80 if ( (passwdentry = (struct passwd *)getpwuid(uid)) == NULL){ 81 return; 82 } 83 } else { 84 if ( (passwdentry = (struct passwd *)getpwnam(username)) == NULL) 85 return; 86 } 87 strlcpy(filename, passwdentry->pw_dir, sizeof(filename)); 88 (void)strlcat(filename, ERRORNAME, sizeof(filename)); 89 } else 90 (void)strlcpy(filename, auxname, sizeof(filename)); 91 #ifdef FULLDEBUG 92 printf("Opening file \"%s\" to read names to ignore.\n", 93 filename); 94 #endif 95 if ( (fyle = fopen(filename, "r")) == NULL){ 96 #ifdef FULLDEBUG 97 fprintf(stderr, "%s: Can't open file \"%s\"\n", 98 processname, filename); 99 #endif 100 return; 101 } 102 /* 103 * Make the first pass through the file, counting lines 104 */ 105 for (nignored = 0; 106 fgets(inbuffer, sizeof(inbuffer)-1, fyle) != NULL; nignored++) 107 continue; 108 names_ignored = (char **)Calloc(nignored+1, sizeof (char *)); 109 fclose(fyle); 110 if (freopen(filename, "r", fyle) == NULL){ 111 #ifdef FULLDEBUG 112 fprintf(stderr, "%s: Failure to open \"%s\" for second read.\n", 113 processname, filename); 114 #endif 115 nignored = 0; 116 return; 117 } 118 for (i=0; i < nignored && 119 (fgets (inbuffer, sizeof(inbuffer)-1, fyle) != NULL); i++){ 120 names_ignored[i] = strdup(inbuffer); 121 (void)substitute(names_ignored[i], '\n', '\0'); 122 } 123 qsort(names_ignored, nignored, sizeof *names_ignored, lexsort); 124 #ifdef FULLDEBUG 125 printf("Names to ignore follow.\n"); 126 for (i=0; i < nignored; i++){ 127 printf("\tIgnore: %s\n", names_ignored[i]); 128 } 129 #endif 130 } 131 132 int 133 lexsort(const void *c1, const void *c2) 134 { 135 char **cpp1, **cpp2; 136 137 cpp1 = (char **)c1; 138 cpp2 = (char **)c2; 139 return(strcmp(*cpp1, *cpp2)); 140 } 141 142 int 143 search_ignore(char *key) 144 { 145 int ub, lb; 146 int halfway; 147 int order; 148 149 if (nignored == 0) 150 return(-1); 151 for(lb = 0, ub = nignored - 1; ub >= lb; ){ 152 halfway = (ub + lb)/2; 153 if ( (order = strcmp(key, names_ignored[halfway])) == 0) 154 return(halfway); 155 if (order < 0) /*key is less than probe, throw away above*/ 156 ub = halfway - 1; 157 else 158 lb = halfway + 1; 159 } 160 return(-1); 161 } 162 163 /* 164 * Tell if the error text is to be ignored. 165 * The error must have been canonicalized, with 166 * the file name the zeroth entry in the errorv, 167 * and the linenumber the second. 168 * Return the new categorization of the error class. 169 */ 170 Errorclass 171 discardit(Eptr errorp) 172 { 173 int language; 174 int i; 175 Errorclass errorclass = errorp->error_e_class; 176 177 switch(errorclass){ 178 case C_SYNC: 179 case C_NONSPEC: 180 case C_UNKNOWN: return(errorclass); 181 default: ; 182 } 183 if(errorp->error_lgtext < 2){ 184 return(C_NONSPEC); 185 } 186 language = errorp->error_language; 187 if(language == INLINT){ 188 if (errorclass != C_NONSPEC){ /* no file */ 189 for(i=0; lint_libs[i] != 0; i++){ 190 if (strcmp(errorp->error_text[0], lint_libs[i]) == 0){ 191 return(C_DISCARD); 192 } 193 } 194 } 195 /* check if the argument to the error message is to be ignored*/ 196 if (ispunct((unsigned char)lastchar(errorp->error_text[2]))) 197 clob_last(errorp->error_text[2], '\0'); 198 if (search_ignore(errorp->error_text[errorclass == C_NONSPEC ? 0 : 2]) >= 0){ 199 return(C_NULLED); 200 } 201 } 202 return(errorclass); 203 } 204