1 /* $NetBSD: filter.c,v 1.7 2001/02/05 01:44:07 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 1.7 2001/02/05 01:44:07 christos 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 __P((const void *, const void *)); 62 int search_ignore __P((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(auxname) 70 char *auxname; 71 { 72 int i; 73 FILE *fyle; 74 char inbuffer[256]; 75 uid_t uid; 76 char filename[MAXPATHLEN]; 77 char *username; 78 struct passwd *passwdentry; 79 80 nignored = 0; 81 if (auxname == 0){ /* use the default */ 82 if ( (username = (char *)getlogin()) == NULL){ 83 username = "Unknown"; 84 uid = getuid(); 85 if ( (passwdentry = (struct passwd *)getpwuid(uid)) == NULL){ 86 return; 87 } 88 } else { 89 if ( (passwdentry = (struct passwd *)getpwnam(username)) == NULL) 90 return; 91 } 92 strlcpy(filename, passwdentry->pw_dir, sizeof(filename)); 93 (void)strlcat(filename, ERRORNAME, sizeof(filename)); 94 } else 95 (void)strlcpy(filename, auxname, sizeof(filename)); 96 #ifdef FULLDEBUG 97 printf("Opening file \"%s\" to read names to ignore.\n", 98 filename); 99 #endif 100 if ( (fyle = fopen(filename, "r")) == NULL){ 101 #ifdef FULLDEBUG 102 fprintf(stderr, "%s: Can't open file \"%s\"\n", 103 processname, filename); 104 #endif 105 return; 106 } 107 /* 108 * Make the first pass through the file, counting lines 109 */ 110 for (nignored = 0; 111 fgets(inbuffer, sizeof(inbuffer)-1, 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 && 124 (fgets (inbuffer, sizeof(inbuffer)-1, fyle) != NULL); i++){ 125 names_ignored[i] = strsave(inbuffer); 126 (void)substitute(names_ignored[i], '\n', '\0'); 127 } 128 qsort(names_ignored, nignored, sizeof *names_ignored, lexsort); 129 #ifdef FULLDEBUG 130 printf("Names to ignore follow.\n"); 131 for (i=0; i < nignored; i++){ 132 printf("\tIgnore: %s\n", names_ignored[i]); 133 } 134 #endif 135 } 136 137 int 138 lexsort(c1, c2) 139 const void *c1, *c2; 140 { 141 char **cpp1, **cpp2; 142 143 cpp1 = (char **)c1; 144 cpp2 = (char **)c2; 145 return(strcmp(*cpp1, *cpp2)); 146 } 147 148 int 149 search_ignore(key) 150 char *key; 151 { 152 int ub, lb; 153 int halfway; 154 int order; 155 156 if (nignored == 0) 157 return(-1); 158 for(lb = 0, ub = nignored - 1; ub >= lb; ){ 159 halfway = (ub + lb)/2; 160 if ( (order = strcmp(key, names_ignored[halfway])) == 0) 161 return(halfway); 162 if (order < 0) /*key is less than probe, throw away above*/ 163 ub = halfway - 1; 164 else 165 lb = halfway + 1; 166 } 167 return(-1); 168 } 169 170 /* 171 * Tell if the error text is to be ignored. 172 * The error must have been canonicalized, with 173 * the file name the zeroth entry in the errorv, 174 * and the linenumber the second. 175 * Return the new categorization of the error class. 176 */ 177 Errorclass 178 discardit(errorp) 179 Eptr errorp; 180 { 181 int language; 182 int i; 183 Errorclass errorclass = errorp->error_e_class; 184 185 switch(errorclass){ 186 case C_SYNC: 187 case C_NONSPEC: 188 case C_UNKNOWN: return(errorclass); 189 default: ; 190 } 191 if(errorp->error_lgtext < 2){ 192 return(C_NONSPEC); 193 } 194 language = errorp->error_language; 195 if(language == INLINT){ 196 if (errorclass != C_NONSPEC){ /* no file */ 197 for(i=0; lint_libs[i] != 0; i++){ 198 if (strcmp(errorp->error_text[0], lint_libs[i]) == 0){ 199 return(C_DISCARD); 200 } 201 } 202 } 203 /* check if the argument to the error message is to be ignored*/ 204 if (ispunct((unsigned char)lastchar(errorp->error_text[2]))) 205 clob_last(errorp->error_text[2], '\0'); 206 if (search_ignore(errorp->error_text[errorclass == C_NONSPEC ? 0 : 2]) >= 0){ 207 return(C_NULLED); 208 } 209 } 210 return(errorclass); 211 } 212