1 /* $NetBSD: filter.c,v 1.6 2000/01/14 06:53:48 mjl 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 1.6 2000/01/14 06:53:48 mjl 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 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 uid_t uid; 77 char filename[MAXPATHLEN]; 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 strlcpy(filename, passwdentry->pw_dir, sizeof(filename)); 94 (void)strlcat(filename, ERRORNAME, sizeof(filename)); 95 } else 96 (void)strlcpy(filename, auxname, sizeof(filename)); 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; 112 fgets(inbuffer, sizeof(inbuffer)-1, fyle) != NULL; nignored++) 113 continue; 114 names_ignored = (char **)Calloc(nignored+1, sizeof (char *)); 115 fclose(fyle); 116 if (freopen(filename, "r", fyle) == NULL){ 117 #ifdef FULLDEBUG 118 fprintf(stderr, "%s: Failure to open \"%s\" for second read.\n", 119 processname, filename); 120 #endif 121 nignored = 0; 122 return; 123 } 124 for (i=0; i < nignored && 125 (fgets (inbuffer, sizeof(inbuffer)-1, fyle) != NULL); i++){ 126 names_ignored[i] = strsave(inbuffer); 127 (void)substitute(names_ignored[i], '\n', '\0'); 128 } 129 qsort(names_ignored, nignored, sizeof *names_ignored, lexsort); 130 #ifdef FULLDEBUG 131 printf("Names to ignore follow.\n"); 132 for (i=0; i < nignored; i++){ 133 printf("\tIgnore: %s\n", names_ignored[i]); 134 } 135 #endif 136 } 137 138 int 139 lexsort(c1, c2) 140 const void *c1, *c2; 141 { 142 char **cpp1, **cpp2; 143 144 cpp1 = (char **)c1; 145 cpp2 = (char **)c2; 146 return(strcmp(*cpp1, *cpp2)); 147 } 148 149 int 150 search_ignore(key) 151 char *key; 152 { 153 int ub, lb; 154 int halfway; 155 int order; 156 157 if (nignored == 0) 158 return(-1); 159 for(lb = 0, ub = nignored - 1; ub >= lb; ){ 160 halfway = (ub + lb)/2; 161 if ( (order = strcmp(key, names_ignored[halfway])) == 0) 162 return(halfway); 163 if (order < 0) /*key is less than probe, throw away above*/ 164 ub = halfway - 1; 165 else 166 lb = halfway + 1; 167 } 168 return(-1); 169 } 170 171 /* 172 * Tell if the error text is to be ignored. 173 * The error must have been canonicalized, with 174 * the file name the zeroth entry in the errorv, 175 * and the linenumber the second. 176 * Return the new categorization of the error class. 177 */ 178 Errorclass 179 discardit(errorp) 180 Eptr errorp; 181 { 182 int language; 183 int i; 184 Errorclass errorclass = errorp->error_e_class; 185 186 switch(errorclass){ 187 case C_SYNC: 188 case C_NONSPEC: 189 case C_UNKNOWN: return(errorclass); 190 default: ; 191 } 192 if(errorp->error_lgtext < 2){ 193 return(C_NONSPEC); 194 } 195 language = errorp->error_language; 196 if(language == INLINT){ 197 if (errorclass != C_NONSPEC){ /* no file */ 198 for(i=0; lint_libs[i] != 0; i++){ 199 if (strcmp(errorp->error_text[0], lint_libs[i]) == 0){ 200 return(C_DISCARD); 201 } 202 } 203 } 204 /* check if the argument to the error message is to be ignored*/ 205 if (ispunct((unsigned char)lastchar(errorp->error_text[2]))) 206 clob_last(errorp->error_text[2], '\0'); 207 if (search_ignore(errorp->error_text[errorclass == C_NONSPEC ? 0 : 2]) >= 0){ 208 return(C_NULLED); 209 } 210 } 211 return(errorclass); 212 } 213