1 /* $NetBSD: filter.c,v 1.20 2023/08/26 14:59:44 rillig 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 1.20 2023/08/26 14:59:44 rillig 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 static const char *lint_libs[] = { 51 IG_FILE1, 52 IG_FILE2, 53 IG_FILE3, 54 IG_FILE4, 55 NULL 56 }; 57 58 static int lexsort(const void *, const void *); 59 static int search_ignore(const char *); 60 61 /* 62 * Read the file ERRORNAME of the names of functions in lint 63 * to ignore complaints about. 64 */ 65 void 66 getignored(const char *auxname) 67 { 68 int i; 69 FILE *fyle; 70 char inbuffer[256]; 71 uid_t uid; 72 char filename[MAXPATHLEN]; 73 const char *username; 74 struct passwd *passwdentry; 75 76 nignored = 0; 77 if (auxname == 0) { /* use the default */ 78 if ((username = getlogin()) == NULL) { 79 username = "Unknown"; 80 uid = getuid(); 81 if ((passwdentry = getpwuid(uid)) == NULL) { 82 return; 83 } 84 } else { 85 if ((passwdentry = getpwnam(username)) == NULL) 86 return; 87 } 88 strlcpy(filename, passwdentry->pw_dir, sizeof(filename)); 89 (void)strlcat(filename, ERRORNAME, sizeof(filename)); 90 } else 91 (void)strlcpy(filename, auxname, sizeof(filename)); 92 #ifdef FULLDEBUG 93 printf("Opening file \"%s\" to read names to ignore.\n", 94 filename); 95 #endif 96 if ((fyle = fopen(filename, "r")) == NULL) { 97 #ifdef FULLDEBUG 98 fprintf(stderr, "%s: Can't open file \"%s\"\n", 99 processname, filename); 100 #endif 101 return; 102 } 103 104 /* 105 * Make the first pass through the file, counting lines 106 */ 107 for (nignored = 0; 108 fgets(inbuffer, sizeof(inbuffer)-1, fyle) != NULL; nignored++) 109 continue; 110 names_ignored = Calloc(nignored+1, sizeof (char *)); 111 rewind(fyle); 112 for (i=0; i < nignored && 113 (fgets (inbuffer, sizeof(inbuffer)-1, fyle) != NULL); i++) { 114 names_ignored[i] = Strdup(inbuffer); 115 (void)substitute(names_ignored[i], '\n', '\0'); 116 } 117 qsort(names_ignored, nignored, sizeof *names_ignored, lexsort); 118 fclose(fyle); 119 #ifdef FULLDEBUG 120 printf("Names to ignore follow.\n"); 121 for (i=0; i < nignored; i++) { 122 printf("\tIgnore: %s\n", names_ignored[i]); 123 } 124 #endif 125 } 126 127 static int 128 lexsort(const void *c1, const void *c2) 129 { 130 const char *const *cpp1; 131 const char *const *cpp2; 132 133 cpp1 = c1; 134 cpp2 = c2; 135 return strcmp(*cpp1, *cpp2); 136 } 137 138 static int 139 search_ignore(const char *key) 140 { 141 int ub, lb; 142 int halfway; 143 int order; 144 145 if (nignored == 0) 146 return -1; 147 for (lb = 0, ub = nignored - 1; ub >= lb; ) { 148 halfway = (ub + lb)/2; 149 if ( (order = strcmp(key, names_ignored[halfway])) == 0) 150 return halfway; 151 if (order < 0) /* key is less than probe, throw away above */ 152 ub = halfway - 1; 153 else 154 lb = halfway + 1; 155 } 156 return -1; 157 } 158 159 /* 160 * Tell if the error text is to be ignored. 161 * The error must have been canonicalized, with 162 * the file name the zeroth entry in the errorv, 163 * and the linenumber the second. 164 * Return the new categorization of the error class. 165 */ 166 Errorclass 167 discardit(Eptr errorp) 168 { 169 int i; 170 Errorclass errorclass = errorp->error_e_class; 171 172 switch (errorclass) { 173 case C_SYNC: 174 case C_NONSPEC: 175 case C_UNKNOWN: return errorclass; 176 default: ; 177 } 178 if (errorp->error_lgtext < 2) { 179 return C_NONSPEC; 180 } 181 if (errorp->error_language == INLINT) { 182 if (errorclass != C_NONSPEC) { /* no file */ 183 for (i=0; lint_libs[i] != 0; i++) { 184 if (strcmp(errorp->error_text[0], lint_libs[i]) == 0) { 185 return C_DISCARD; 186 } 187 } 188 } 189 /* check if the argument to the error message is to be ignored */ 190 if (ispunct((unsigned char)lastchar(errorp->error_text[2]))) 191 clob_last(errorp->error_text[2], '\0'); 192 if (search_ignore(errorp->error_text[errorclass == C_NONSPEC ? 0 : 2]) >= 0) { 193 return C_NULLED; 194 } 195 } 196 return errorclass; 197 } 198
Indexes created Sat Sep 20 22:09:52 GMT 2025