| 1 | /* |
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| 2 | * zzuf - general purpose fuzzer |
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| 3 | * Copyright (c) 2006 Sam Hocevar <sam@zoy.org> |
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| 4 | * All Rights Reserved |
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| 5 | * |
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| 6 | * $Id$ |
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| 7 | * |
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| 8 | * This program is free software. It comes without any warranty, to |
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| 9 | * the extent permitted by applicable law. You can redistribute it |
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| 10 | * and/or modify it under the terms of the Do What The Fuck You Want |
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| 11 | * To Public License, Version 2, as published by Sam Hocevar. See |
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| 12 | * http://sam.zoy.org/wtfpl/COPYING for more details. |
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| 13 | */ |
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| 14 | |
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| 15 | /* |
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| 16 | * load-stream.c: loaded stream functions |
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| 17 | */ |
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| 18 | |
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| 19 | #include "config.h" |
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| 20 | |
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| 21 | /* Needed for getline() and getdelim() */ |
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| 22 | #define _GNU_SOURCE |
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| 23 | /* Needed for getc_unlocked() on OpenSolaris */ |
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| 24 | #define __EXTENSIONS__ |
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| 25 | |
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| 26 | /* Define if stdio operations use *only* the refill mechanism */ |
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| 27 | #if defined HAVE___SREFILL |
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| 28 | # define REFILL_ONLY_STDIO |
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| 29 | #endif |
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| 30 | |
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| 31 | #if defined HAVE_STDINT_H |
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| 32 | # include <stdint.h> |
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| 33 | #elif defined HAVE_INTTYPES_H |
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| 34 | # include <inttypes.h> |
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| 35 | #endif |
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| 36 | #include <stdlib.h> |
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| 37 | |
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| 38 | #include <stdio.h> |
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| 39 | #include <sys/types.h> |
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| 40 | #if defined HAVE_UNISTD_H |
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| 41 | # include <unistd.h> /* Needed for __srefill’s lseek() call */ |
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| 42 | #endif |
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| 43 | |
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| 44 | #include "libzzuf.h" |
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| 45 | #include "lib-load.h" |
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| 46 | #include "debug.h" |
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| 47 | #include "fuzz.h" |
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| 48 | #include "fd.h" |
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| 49 | |
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| 50 | #if defined HAVE___SREFILL |
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| 51 | int NEW(__srefill)(FILE *fp); |
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| 52 | #endif |
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| 53 | |
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| 54 | #if defined HAVE___FILBUF |
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| 55 | int NEW(__filbuf)(FILE *fp); |
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| 56 | #endif |
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| 57 | |
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| 58 | #if defined HAVE___SRGET && !defined HAVE___SREFILL |
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| 59 | int NEW(__srget)(FILE *fp); |
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| 60 | #endif |
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| 61 | |
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| 62 | /* Library functions that we divert */ |
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| 63 | static FILE * (*ORIG(fopen)) (const char *path, const char *mode); |
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| 64 | #if defined HAVE_FOPEN64 |
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| 65 | static FILE * (*ORIG(fopen64)) (const char *path, const char *mode); |
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| 66 | #endif |
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| 67 | #if defined HAVE___FOPEN64 |
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| 68 | static FILE * (*ORIG(__fopen64))(const char *path, const char *mode); |
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| 69 | #endif |
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| 70 | static FILE * (*ORIG(freopen)) (const char *path, const char *mode, |
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| 71 | FILE *stream); |
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| 72 | #if defined HAVE_FREOPEN64 |
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| 73 | static FILE * (*ORIG(freopen64))(const char *path, const char *mode, |
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| 74 | FILE *stream); |
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| 75 | #endif |
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| 76 | #if defined HAVE___FREOPEN64 |
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| 77 | static FILE * (*ORIG(__freopen64)) (const char *path, const char *mode, |
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| 78 | FILE *stream); |
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| 79 | #endif |
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| 80 | static int (*ORIG(fseek)) (FILE *stream, long offset, int whence); |
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| 81 | #if defined HAVE_FSEEKO |
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| 82 | static int (*ORIG(fseeko)) (FILE *stream, off_t offset, int whence); |
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| 83 | #endif |
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| 84 | #if defined HAVE_FSEEKO64 |
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| 85 | static int (*ORIG(fseeko64)) (FILE *stream, off_t offset, int whence); |
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| 86 | #endif |
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| 87 | #if defined HAVE___FSEEKO64 |
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| 88 | static int (*ORIG(__fseeko64)) (FILE *stream, off_t offset, int whence); |
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| 89 | #endif |
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| 90 | #if defined HAVE_FSETPOS64 |
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| 91 | static int (*ORIG(fsetpos64))(FILE *stream, const fpos64_t *pos); |
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| 92 | #endif |
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| 93 | #if defined HAVE___FSETPOS64 |
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| 94 | static int (*ORIG(__fsetpos64)) (FILE *stream, const fpos64_t *pos); |
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| 95 | #endif |
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| 96 | static void (*ORIG(rewind)) (FILE *stream); |
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| 97 | static size_t (*ORIG(fread)) (void *ptr, size_t size, size_t nmemb, |
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| 98 | FILE *stream); |
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| 99 | #if defined HAVE_FREAD_UNLOCKED |
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| 100 | static size_t (*ORIG(fread_unlocked)) (void *ptr, size_t size, size_t nmemb, |
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| 101 | FILE *stream); |
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| 102 | #endif |
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| 103 | static int (*ORIG(getc)) (FILE *stream); |
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| 104 | static int (*ORIG(getchar)) (void); |
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| 105 | static int (*ORIG(fgetc)) (FILE *stream); |
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| 106 | #if defined HAVE__IO_GETC |
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| 107 | static int (*ORIG(_IO_getc)) (FILE *stream); |
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| 108 | #endif |
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| 109 | #if defined HAVE_GETC_UNLOCKED |
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| 110 | static int (*ORIG(getc_unlocked)) (FILE *stream); |
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| 111 | #endif |
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| 112 | #if defined HAVE_GETCHAR_UNLOCKED |
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| 113 | static int (*ORIG(getchar_unlocked)) (void); |
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| 114 | #endif |
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| 115 | #if defined HAVE_FGETC_UNLOCKED |
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| 116 | static int (*ORIG(fgetc_unlocked)) (FILE *stream); |
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| 117 | #endif |
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| 118 | static char * (*ORIG(fgets)) (char *s, int size, FILE *stream); |
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| 119 | #if defined HAVE_FGETS_UNLOCKED |
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| 120 | static char * (*ORIG(fgets_unlocked)) (char *s, int size, FILE *stream); |
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| 121 | #endif |
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| 122 | static int (*ORIG(ungetc)) (int c, FILE *stream); |
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| 123 | static int (*ORIG(fclose)) (FILE *fp); |
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| 124 | |
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| 125 | /* Additional GNUisms */ |
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| 126 | #if defined HAVE_GETLINE |
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| 127 | static ssize_t (*ORIG(getline)) (char **lineptr, size_t *n, FILE *stream); |
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| 128 | #endif |
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| 129 | #if defined HAVE_GETDELIM |
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| 130 | static ssize_t (*ORIG(getdelim)) (char **lineptr, size_t *n, int delim, |
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| 131 | FILE *stream); |
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| 132 | #endif |
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| 133 | #if defined HAVE___GETDELIM |
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| 134 | static ssize_t (*ORIG(__getdelim)) (char **lineptr, size_t *n, int delim, |
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| 135 | FILE *stream); |
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| 136 | #endif |
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| 137 | |
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| 138 | /* Additional BSDisms */ |
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| 139 | #if defined HAVE_FGETLN |
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| 140 | static char * (*ORIG(fgetln)) (FILE *stream, size_t *len); |
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| 141 | #endif |
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| 142 | #if defined HAVE___SREFILL |
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| 143 | int (*ORIG(__srefill)) (FILE *fp); |
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| 144 | #endif |
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| 145 | #if defined HAVE___SRGET && !defined HAVE___SREFILL |
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| 146 | int (*ORIG(__srget)) (FILE *fp); |
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| 147 | #endif |
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| 148 | |
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| 149 | /* Additional HP-UXisms */ |
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| 150 | #if defined HAVE___FILBUF |
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| 151 | int (*ORIG(__filbuf)) (FILE *fp); |
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| 152 | #endif |
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| 153 | |
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| 154 | /* Our function wrappers */ |
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| 155 | #if defined REFILL_ONLY_STDIO /* Fuzz fp if we have __srefill() */ |
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| 156 | # define FOPEN_FUZZ() \ |
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| 157 | _zz_fuzz(fd, ret->FILE_PTR, ret->FILE_CNT) |
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| 158 | #else |
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| 159 | # define FOPEN_FUZZ() |
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| 160 | #endif |
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| 161 | |
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| 162 | #define FOPEN(fn) \ |
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| 163 | do \ |
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| 164 | { \ |
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| 165 | LOADSYM(fn); \ |
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| 166 | if(!_zz_ready) \ |
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| 167 | return ORIG(fn)(path, mode); \ |
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| 168 | _zz_lock(-1); \ |
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| 169 | ret = ORIG(fn)(path, mode); \ |
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| 170 | _zz_unlock(-1); \ |
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| 171 | if(ret && _zz_mustwatch(path)) \ |
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| 172 | { \ |
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| 173 | int fd = fileno(ret); \ |
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| 174 | _zz_register(fd); \ |
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| 175 | debug("%s(\"%s\", \"%s\") = [%i]", __func__, path, mode, fd); \ |
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| 176 | FOPEN_FUZZ(); \ |
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| 177 | } \ |
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| 178 | } while(0) |
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| 179 | |
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| 180 | FILE *NEW(fopen)(const char *path, const char *mode) |
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| 181 | { |
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| 182 | FILE *ret; FOPEN(fopen); return ret; |
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| 183 | } |
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| 184 | |
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| 185 | #if defined HAVE_FOPEN64 |
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| 186 | FILE *NEW(fopen64)(const char *path, const char *mode) |
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| 187 | { |
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| 188 | FILE *ret; FOPEN(fopen64); return ret; |
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| 189 | } |
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| 190 | #endif |
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| 191 | |
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| 192 | #if defined HAVE___FOPEN64 |
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| 193 | FILE *NEW(__fopen64)(const char *path, const char *mode) |
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| 194 | { |
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| 195 | FILE *ret; FOPEN(__fopen64); return ret; |
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| 196 | } |
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| 197 | #endif |
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| 198 | |
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| 199 | #define FREOPEN(fn) \ |
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| 200 | do \ |
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| 201 | { \ |
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| 202 | int fd0 = -1, fd1 = -1, disp = 0; \ |
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| 203 | LOADSYM(fn); \ |
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| 204 | if(_zz_ready && (fd0 = fileno(stream)) >= 0 && _zz_iswatched(fd0)) \ |
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| 205 | { \ |
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| 206 | _zz_unregister(fd0); \ |
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| 207 | disp = 1; \ |
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| 208 | } \ |
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| 209 | _zz_lock(-1); \ |
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| 210 | ret = ORIG(fn)(path, mode, stream); \ |
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| 211 | _zz_unlock(-1); \ |
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| 212 | if(ret && _zz_mustwatch(path)) \ |
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| 213 | { \ |
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| 214 | fd1 = fileno(ret); \ |
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| 215 | _zz_register(fd1); \ |
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| 216 | disp = 1; \ |
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| 217 | } \ |
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| 218 | if(disp) \ |
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| 219 | debug("%s(\"%s\", \"%s\", [%i]) = [%i]", __func__, \ |
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| 220 | path, mode, fd0, fd1); \ |
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| 221 | } while(0) |
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| 222 | |
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| 223 | FILE *NEW(freopen)(const char *path, const char *mode, FILE *stream) |
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| 224 | { |
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| 225 | FILE *ret; FREOPEN(freopen); return ret; |
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| 226 | } |
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| 227 | |
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| 228 | #if defined HAVE_FREOPEN64 |
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| 229 | FILE *NEW(freopen64)(const char *path, const char *mode, FILE *stream) |
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| 230 | { |
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| 231 | FILE *ret; FREOPEN(freopen64); return ret; |
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| 232 | } |
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| 233 | #endif |
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| 234 | |
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| 235 | #if defined HAVE___FREOPEN64 |
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| 236 | FILE *NEW(__freopen64)(const char *path, const char *mode, FILE *stream) |
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| 237 | { |
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| 238 | FILE *ret; FREOPEN(__freopen64); return ret; |
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| 239 | } |
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| 240 | #endif |
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| 241 | |
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| 242 | #if defined REFILL_ONLY_STDIO /* Don't fuzz or seek if we have __srefill() */ |
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| 243 | # define FSEEK_FUZZ(fn2) |
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| 244 | #else |
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| 245 | # define FSEEK_FUZZ(fn2) \ |
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| 246 | if(ret == 0) \ |
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| 247 | { \ |
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| 248 | /* FIXME: check what happens when fseek()ing a pipe */ \ |
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| 249 | switch(whence) \ |
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| 250 | { \ |
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| 251 | case SEEK_END: \ |
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| 252 | offset = fn2(stream); \ |
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| 253 | /* fall through */ \ |
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| 254 | case SEEK_SET: \ |
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| 255 | _zz_setpos(fd, offset); \ |
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| 256 | break; \ |
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| 257 | case SEEK_CUR: \ |
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| 258 | _zz_addpos(fd, offset); \ |
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| 259 | break; \ |
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| 260 | } \ |
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| 261 | } |
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| 262 | #endif |
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| 263 | |
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| 264 | #define FSEEK(fn, fn2) \ |
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| 265 | do \ |
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| 266 | { \ |
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| 267 | int fd; \ |
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| 268 | LOADSYM(fn); \ |
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| 269 | fd = fileno(stream); \ |
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| 270 | if(!_zz_ready || !_zz_iswatched(fd) || !_zz_isactive(fd)) \ |
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| 271 | return ORIG(fn)(stream, offset, whence); \ |
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| 272 | _zz_lock(fd); \ |
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| 273 | ret = ORIG(fn)(stream, offset, whence); \ |
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| 274 | _zz_unlock(fd); \ |
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| 275 | debug("%s([%i], %lli, %i) = %i", __func__, \ |
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| 276 | fd, (long long int)offset, whence, ret); \ |
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| 277 | FSEEK_FUZZ(fn2) \ |
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| 278 | } while(0) |
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| 279 | |
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| 280 | int NEW(fseek)(FILE *stream, long offset, int whence) |
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| 281 | { |
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| 282 | int ret; FSEEK(fseek, ftell); return ret; |
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| 283 | } |
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| 284 | |
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| 285 | #if defined HAVE_FSEEKO |
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| 286 | int NEW(fseeko)(FILE *stream, off_t offset, int whence) |
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| 287 | { |
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| 288 | int ret; FSEEK(fseeko, ftello); return ret; |
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| 289 | } |
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| 290 | #endif |
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| 291 | |
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| 292 | #if defined HAVE_FSEEKO64 |
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| 293 | int NEW(fseeko64)(FILE *stream, off64_t offset, int whence) |
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| 294 | { |
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| 295 | int ret; FSEEK(fseeko64, ftello64); return ret; |
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| 296 | } |
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| 297 | #endif |
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| 298 | |
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| 299 | #if defined HAVE___FSEEKO64 |
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| 300 | int NEW(__fseeko64)(FILE *stream, off64_t offset, int whence) |
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| 301 | { |
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| 302 | int ret; FSEEK(__fseeko64, ftello); return ret; |
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| 303 | } |
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| 304 | #endif |
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| 305 | |
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| 306 | #define FSETPOS(fn) \ |
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| 307 | do \ |
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| 308 | { \ |
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| 309 | int fd; \ |
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| 310 | LOADSYM(fn); \ |
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| 311 | fd = fileno(stream); \ |
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| 312 | if(!_zz_ready || !_zz_iswatched(fd) || !_zz_isactive(fd)) \ |
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| 313 | return ORIG(fn)(stream, pos); \ |
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| 314 | _zz_lock(fd); \ |
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| 315 | ret = ORIG(fn)(stream, pos); \ |
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| 316 | _zz_unlock(fd); \ |
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| 317 | debug("%s([%i], %lli) = %i", __func__, \ |
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| 318 | fd, (long long int)FPOS_CAST(*pos), ret); \ |
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| 319 | _zz_setpos(fd, (int64_t)FPOS_CAST(*pos)); \ |
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| 320 | } \ |
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| 321 | while(0) |
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| 322 | |
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| 323 | #if defined HAVE_FSETPOS64 |
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| 324 | int NEW(fsetpos64)(FILE *stream, const fpos64_t *pos) |
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| 325 | { |
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| 326 | int ret; FSETPOS(fsetpos64); return ret; |
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| 327 | } |
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| 328 | #endif |
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| 329 | |
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| 330 | #if defined HAVE___FSETPOS64 |
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| 331 | int NEW(__fsetpos64)(FILE *stream, const fpos64_t *pos) |
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| 332 | { |
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| 333 | int ret; FSETPOS(__fsetpos64); return ret; |
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| 334 | } |
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| 335 | #endif |
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| 336 | |
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| 337 | void NEW(rewind)(FILE *stream) |
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| 338 | { |
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| 339 | int fd; |
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| 340 | |
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| 341 | LOADSYM(rewind); |
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| 342 | fd = fileno(stream); |
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| 343 | if(!_zz_ready || !_zz_iswatched(fd) || !_zz_isactive(fd)) |
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| 344 | { |
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| 345 | ORIG(rewind)(stream); |
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| 346 | return; |
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| 347 | } |
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| 348 | |
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| 349 | _zz_lock(fd); |
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| 350 | ORIG(rewind)(stream); |
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| 351 | _zz_unlock(fd); |
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| 352 | debug("%s([%i])", __func__, fd); |
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| 353 | |
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| 354 | #if defined REFILL_ONLY_STDIO /* Don't fuzz or seek if we have __srefill() */ |
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| 355 | #else |
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| 356 | /* FIXME: check what happens when rewind()ing a pipe */ |
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| 357 | _zz_setpos(fd, 0); |
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| 358 | #endif |
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| 359 | } |
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| 360 | |
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| 361 | #if defined HAVE___FILBUF || defined HAVE___SRGET |
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| 362 | # define FREAD_PREFUZZ() \ |
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| 363 | do \ |
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| 364 | { \ |
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| 365 | int64_t tmp = _zz_getpos(fd); \ |
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| 366 | _zz_setpos(fd, pos); \ |
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| 367 | already_fuzzed = _zz_getfuzzed(fd); \ |
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| 368 | _zz_setpos(fd, tmp); \ |
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| 369 | } \ |
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| 370 | while(0) |
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| 371 | #else |
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| 372 | # define FREAD_PREFUZZ() do {} while(0) |
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| 373 | #endif |
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| 374 | |
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| 375 | #if defined REFILL_ONLY_STDIO /* Don't fuzz or seek if we have __srefill() */ |
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| 376 | # define FREAD_FUZZ() \ |
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| 377 | do \ |
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| 378 | { \ |
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| 379 | debug("%s(%p, %li, %li, [%i]) = %li", __func__, ptr, \ |
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| 380 | (long int)size, (long int)nmemb, fd, (long int)ret); \ |
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| 381 | } while(0) |
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| 382 | #else |
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| 383 | # define FREAD_FUZZ() \ |
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| 384 | do \ |
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| 385 | { \ |
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| 386 | int64_t newpos = ftell(stream); \ |
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| 387 | /* XXX: the number of bytes read is not ret * size, because \ |
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| 388 | * a partial read may have advanced the stream pointer. However, \ |
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| 389 | * when reading from a pipe ftell() will return 0, and ret * size \ |
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| 390 | * is then better than nothing. */ \ |
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| 391 | if(newpos <= 0) \ |
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| 392 | { \ |
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| 393 | pos = _zz_getpos(fd); \ |
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| 394 | newpos = pos + ret * size; \ |
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| 395 | } \ |
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| 396 | if(newpos != pos) \ |
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| 397 | { \ |
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| 398 | char *b = ptr; \ |
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| 399 | /* Skip bytes that were already fuzzed by __filbuf or __srget */ \ |
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| 400 | if(newpos > pos + already_fuzzed) \ |
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| 401 | { \ |
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| 402 | _zz_setpos(fd, pos + already_fuzzed); \ |
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| 403 | _zz_fuzz(fd, ptr, newpos - pos - already_fuzzed); \ |
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| 404 | } \ |
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| 405 | _zz_setpos(fd, newpos); \ |
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| 406 | if(newpos >= pos + 4) \ |
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| 407 | debug("%s(%p, %li, %li, [%i]) = %li \"%c%c%c%c...", __func__, \ |
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| 408 | ptr, (long int)size, (long int)nmemb, fd, \ |
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| 409 | (long int)ret, b[0], b[1], b[2], b[3]); \ |
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| 410 | else \ |
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| 411 | debug("%s(%p, %li, %li, [%i]) = %li \"%c...", __func__, ptr, \ |
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| 412 | (long int)size, (long int)nmemb, fd, \ |
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| 413 | (long int)ret, b[0]); \ |
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| 414 | } \ |
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| 415 | else \ |
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| 416 | debug("%s(%p, %li, %li, [%i]) = %li", __func__, ptr, \ |
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| 417 | (long int)size, (long int)nmemb, fd, (long int)ret); \ |
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| 418 | } while(0) |
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| 419 | #endif |
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| 420 | |
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| 421 | #define FREAD(fn) \ |
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| 422 | do \ |
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| 423 | { \ |
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| 424 | int64_t pos; \ |
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| 425 | int fd, already_fuzzed = 0; \ |
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| 426 | LOADSYM(fn); \ |
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| 427 | fd = fileno(stream); \ |
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| 428 | if(!_zz_ready || !_zz_iswatched(fd) || !_zz_isactive(fd)) \ |
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| 429 | return ORIG(fn)(ptr, size, nmemb, stream); \ |
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| 430 | pos = ftell(stream); \ |
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| 431 | _zz_lock(fd); \ |
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| 432 | ret = ORIG(fn)(ptr, size, nmemb, stream); \ |
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| 433 | _zz_unlock(fd); \ |
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| 434 | FREAD_PREFUZZ(); \ |
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| 435 | FREAD_FUZZ(); \ |
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| 436 | } while(0) |
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| 437 | |
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| 438 | size_t NEW(fread)(void *ptr, size_t size, size_t nmemb, FILE *stream) |
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| 439 | { |
|---|
| 440 | size_t ret; FREAD(fread); return ret; |
|---|
| 441 | } |
|---|
| 442 | |
|---|
| 443 | #if defined HAVE_FREAD_UNLOCKED |
|---|
| 444 | #undef fread_unlocked /* can be a macro; we don’t want that */ |
|---|
| 445 | size_t NEW(fread_unlocked)(void *ptr, size_t size, size_t nmemb, FILE *stream) |
|---|
| 446 | { |
|---|
| 447 | size_t ret; FREAD(fread_unlocked); return ret; |
|---|
| 448 | } |
|---|
| 449 | #endif |
|---|
| 450 | |
|---|
| 451 | #if defined HAVE___FILBUF || defined HAVE___SRGET |
|---|
| 452 | # define FGETC_PREFUZZ already_fuzzed = _zz_getfuzzed(fd); |
|---|
| 453 | #else |
|---|
| 454 | # define FGETC_PREFUZZ |
|---|
| 455 | #endif |
|---|
| 456 | |
|---|
| 457 | #if defined REFILL_ONLY_STDIO /* Don't fuzz or seek if we have __srefill() */ |
|---|
| 458 | # define FGETC_FUZZ |
|---|
| 459 | #else |
|---|
| 460 | # define FGETC_FUZZ \ |
|---|
| 461 | if(ret != EOF) \ |
|---|
| 462 | { \ |
|---|
| 463 | uint8_t ch = ret; \ |
|---|
| 464 | if(already_fuzzed <= 0) \ |
|---|
| 465 | _zz_fuzz(fd, &ch, 1); \ |
|---|
| 466 | _zz_addpos(fd, 1); \ |
|---|
| 467 | ret = ch; \ |
|---|
| 468 | } |
|---|
| 469 | #endif |
|---|
| 470 | |
|---|
| 471 | #define FGETC(fn, s, arg) \ |
|---|
| 472 | do { \ |
|---|
| 473 | int fd, already_fuzzed = 0; \ |
|---|
| 474 | LOADSYM(fn); \ |
|---|
| 475 | fd = fileno(s); \ |
|---|
| 476 | if(!_zz_ready || !_zz_iswatched(fd) || !_zz_isactive(fd)) \ |
|---|
| 477 | return ORIG(fn)(arg); \ |
|---|
| 478 | _zz_lock(fd); \ |
|---|
| 479 | ret = ORIG(fn)(arg); \ |
|---|
| 480 | _zz_unlock(fd); \ |
|---|
| 481 | FGETC_PREFUZZ \ |
|---|
| 482 | FGETC_FUZZ \ |
|---|
| 483 | if(ret == EOF) \ |
|---|
| 484 | debug("%s([%i]) = EOF", __func__, fd); \ |
|---|
| 485 | else \ |
|---|
| 486 | debug("%s([%i]) = '%c'", __func__, fd, ret); \ |
|---|
| 487 | } while(0) |
|---|
| 488 | |
|---|
| 489 | #undef getc /* can be a macro; we don’t want that */ |
|---|
| 490 | int NEW(getc)(FILE *stream) |
|---|
| 491 | { |
|---|
| 492 | int ret; FGETC(getc, stream, stream); return ret; |
|---|
| 493 | } |
|---|
| 494 | |
|---|
| 495 | #undef getchar /* can be a macro; we don’t want that */ |
|---|
| 496 | int NEW(getchar)(void) |
|---|
| 497 | { |
|---|
| 498 | int ret; FGETC(getchar, stdin, /* empty */); return ret; |
|---|
| 499 | } |
|---|
| 500 | |
|---|
| 501 | int NEW(fgetc)(FILE *stream) |
|---|
| 502 | { |
|---|
| 503 | int ret; FGETC(fgetc, stream, stream); return ret; |
|---|
| 504 | } |
|---|
| 505 | |
|---|
| 506 | #if defined HAVE__IO_GETC |
|---|
| 507 | int NEW(_IO_getc)(FILE *stream) |
|---|
| 508 | { |
|---|
| 509 | int ret; FGETC(_IO_getc, stream, stream); return ret; |
|---|
| 510 | } |
|---|
| 511 | #endif |
|---|
| 512 | |
|---|
| 513 | #if defined HAVE_GETC_UNLOCKED |
|---|
| 514 | #undef getc_unlocked /* can be a macro; we don’t want that */ |
|---|
| 515 | int NEW(getc_unlocked)(FILE *stream) |
|---|
| 516 | { |
|---|
| 517 | int ret; FGETC(getc_unlocked, stream, stream); return ret; |
|---|
| 518 | } |
|---|
| 519 | #endif |
|---|
| 520 | |
|---|
| 521 | #if defined HAVE_GETCHAR_UNLOCKED |
|---|
| 522 | #undef getchar_unlocked /* can be a macro; we don’t want that */ |
|---|
| 523 | int NEW(getchar_unlocked)(void) |
|---|
| 524 | { |
|---|
| 525 | int ret; FGETC(getchar_unlocked, stdin, /* empty */); return ret; |
|---|
| 526 | } |
|---|
| 527 | #endif |
|---|
| 528 | |
|---|
| 529 | #if defined HAVE_FGETC_UNLOCKED |
|---|
| 530 | #undef fgetc_unlocked /* can be a macro; we don’t want that */ |
|---|
| 531 | int NEW(fgetc_unlocked)(FILE *stream) |
|---|
| 532 | { |
|---|
| 533 | int ret; FGETC(fgetc_unlocked, stream, stream); return ret; |
|---|
| 534 | } |
|---|
| 535 | #endif |
|---|
| 536 | |
|---|
| 537 | #if defined REFILL_ONLY_STDIO /* Don't fuzz or seek if we have __srefill() */ |
|---|
| 538 | # define FGETS_FUZZ(fn, fn2) \ |
|---|
| 539 | _zz_lock(fd); \ |
|---|
| 540 | ret = ORIG(fn)(s, size, stream); \ |
|---|
| 541 | _zz_unlock(fd); |
|---|
| 542 | #else |
|---|
| 543 | # define FGETS_FUZZ(fn, fn2) \ |
|---|
| 544 | if(size <= 0) \ |
|---|
| 545 | ret = NULL; \ |
|---|
| 546 | else if(size == 1) \ |
|---|
| 547 | s[0] = '\0'; \ |
|---|
| 548 | else \ |
|---|
| 549 | { \ |
|---|
| 550 | int i; \ |
|---|
| 551 | for(i = 0; i < size - 1; i++) \ |
|---|
| 552 | { \ |
|---|
| 553 | int ch; \ |
|---|
| 554 | _zz_lock(fd); \ |
|---|
| 555 | ch = ORIG(fn2)(stream); \ |
|---|
| 556 | _zz_unlock(fd); \ |
|---|
| 557 | if(ch == EOF) \ |
|---|
| 558 | { \ |
|---|
| 559 | s[i] = '\0'; \ |
|---|
| 560 | if(!i) \ |
|---|
| 561 | ret = NULL; \ |
|---|
| 562 | break; \ |
|---|
| 563 | } \ |
|---|
| 564 | s[i] = (char)(unsigned char)ch; \ |
|---|
| 565 | _zz_fuzz(fd, (uint8_t *)s + i, 1); /* rather inefficient */ \ |
|---|
| 566 | _zz_addpos(fd, 1); \ |
|---|
| 567 | if(s[i] == '\n') \ |
|---|
| 568 | { \ |
|---|
| 569 | s[i + 1] = '\0'; \ |
|---|
| 570 | break; \ |
|---|
| 571 | } \ |
|---|
| 572 | } \ |
|---|
| 573 | } |
|---|
| 574 | #endif |
|---|
| 575 | |
|---|
| 576 | #define FGETS(fn, fn2) \ |
|---|
| 577 | do \ |
|---|
| 578 | { \ |
|---|
| 579 | int fd; \ |
|---|
| 580 | ret = s; \ |
|---|
| 581 | LOADSYM(fn); \ |
|---|
| 582 | LOADSYM(fn2); \ |
|---|
| 583 | fd = fileno(stream); \ |
|---|
| 584 | if(!_zz_ready || !_zz_iswatched(fd) || !_zz_isactive(fd)) \ |
|---|
| 585 | return ORIG(fn)(s, size, stream); \ |
|---|
| 586 | FGETS_FUZZ(fn, fn2) \ |
|---|
| 587 | debug("%s(%p, %i, [%i]) = %p", __func__, s, size, fd, ret); \ |
|---|
| 588 | } while(0) |
|---|
| 589 | |
|---|
| 590 | char *NEW(fgets)(char *s, int size, FILE *stream) |
|---|
| 591 | { |
|---|
| 592 | char *ret; FGETS(fgets, fgetc); return ret; |
|---|
| 593 | } |
|---|
| 594 | |
|---|
| 595 | #if defined HAVE_FGETS_UNLOCKED |
|---|
| 596 | char *NEW(fgets_unlocked)(char *s, int size, FILE *stream) |
|---|
| 597 | { |
|---|
| 598 | char *ret; FGETS(fgets_unlocked, fgetc_unlocked); return ret; |
|---|
| 599 | } |
|---|
| 600 | #endif |
|---|
| 601 | |
|---|
| 602 | int NEW(ungetc)(int c, FILE *stream) |
|---|
| 603 | { |
|---|
| 604 | int ret, fd; |
|---|
| 605 | |
|---|
| 606 | LOADSYM(ungetc); |
|---|
| 607 | fd = fileno(stream); |
|---|
| 608 | if(!_zz_ready || !_zz_iswatched(fd) || !_zz_isactive(fd)) |
|---|
| 609 | return ORIG(ungetc)(c, stream); |
|---|
| 610 | |
|---|
| 611 | _zz_lock(fd); |
|---|
| 612 | ret = ORIG(ungetc)(c, stream); |
|---|
| 613 | _zz_unlock(fd); |
|---|
| 614 | |
|---|
| 615 | if(ret != EOF) |
|---|
| 616 | { |
|---|
| 617 | struct fuzz *fuzz = _zz_getfuzz(fd); |
|---|
| 618 | fuzz->uflag = 1; |
|---|
| 619 | fuzz->upos = _zz_getpos(fd) - 1; |
|---|
| 620 | fuzz->uchar = c; |
|---|
| 621 | #if defined REFILL_ONLY_STDIO /* Don't fuzz or seek if we have __srefill() */ |
|---|
| 622 | #else |
|---|
| 623 | _zz_addpos(fd, -1); |
|---|
| 624 | #endif |
|---|
| 625 | } |
|---|
| 626 | |
|---|
| 627 | if(ret == EOF) |
|---|
| 628 | debug("%s(0x%02x, [%i]) = EOF", __func__, c, fd); |
|---|
| 629 | else |
|---|
| 630 | debug("%s(0x%02x, [%i]) = '%c'", __func__, c, fd, ret); |
|---|
| 631 | |
|---|
| 632 | return ret; |
|---|
| 633 | } |
|---|
| 634 | |
|---|
| 635 | int NEW(fclose)(FILE *fp) |
|---|
| 636 | { |
|---|
| 637 | int ret, fd; |
|---|
| 638 | |
|---|
| 639 | LOADSYM(fclose); |
|---|
| 640 | fd = fileno(fp); |
|---|
| 641 | if(!_zz_ready || !_zz_iswatched(fd)) |
|---|
| 642 | return ORIG(fclose)(fp); |
|---|
| 643 | |
|---|
| 644 | _zz_lock(fd); |
|---|
| 645 | ret = ORIG(fclose)(fp); |
|---|
| 646 | _zz_unlock(fd); |
|---|
| 647 | debug("%s([%i]) = %i", __func__, fd, ret); |
|---|
| 648 | _zz_unregister(fd); |
|---|
| 649 | |
|---|
| 650 | return ret; |
|---|
| 651 | } |
|---|
| 652 | |
|---|
| 653 | #define GETDELIM(fn, delim, need_delim) \ |
|---|
| 654 | do { \ |
|---|
| 655 | char *line; \ |
|---|
| 656 | ssize_t done, size; \ |
|---|
| 657 | int fd, finished = 0; \ |
|---|
| 658 | LOADSYM(fn); \ |
|---|
| 659 | LOADSYM(getdelim); \ |
|---|
| 660 | LOADSYM(fgetc); \ |
|---|
| 661 | fd = fileno(stream); \ |
|---|
| 662 | if(!_zz_ready || !_zz_iswatched(fd) || !_zz_isactive(fd)) \ |
|---|
| 663 | return ORIG(getdelim)(lineptr, n, delim, stream); \ |
|---|
| 664 | line = *lineptr; \ |
|---|
| 665 | size = line ? *n : 0; \ |
|---|
| 666 | ret = done = finished = 0; \ |
|---|
| 667 | for(;;) \ |
|---|
| 668 | { \ |
|---|
| 669 | int ch; \ |
|---|
| 670 | if(done >= size) /* highly inefficient but I don't care */ \ |
|---|
| 671 | line = realloc(line, size = done + 1); \ |
|---|
| 672 | if(finished) \ |
|---|
| 673 | { \ |
|---|
| 674 | line[done] = '\0'; \ |
|---|
| 675 | *n = size; \ |
|---|
| 676 | *lineptr = line; \ |
|---|
| 677 | break; \ |
|---|
| 678 | } \ |
|---|
| 679 | _zz_lock(fd); \ |
|---|
| 680 | ch = ORIG(fgetc)(stream); \ |
|---|
| 681 | _zz_unlock(fd); \ |
|---|
| 682 | if(ch == EOF) \ |
|---|
| 683 | { \ |
|---|
| 684 | finished = 1; \ |
|---|
| 685 | ret = done; \ |
|---|
| 686 | } \ |
|---|
| 687 | else \ |
|---|
| 688 | { \ |
|---|
| 689 | unsigned char c = ch; \ |
|---|
| 690 | _zz_fuzz(fd, &c, 1); /* even more inefficient */ \ |
|---|
| 691 | line[done++] = c; \ |
|---|
| 692 | _zz_addpos(fd, 1); \ |
|---|
| 693 | if(c == delim) \ |
|---|
| 694 | { \ |
|---|
| 695 | finished = 1; \ |
|---|
| 696 | ret = done; \ |
|---|
| 697 | } \ |
|---|
| 698 | } \ |
|---|
| 699 | } \ |
|---|
| 700 | if(need_delim) \ |
|---|
| 701 | debug("%s(%p, %p, '%c', [%i]) = %li", __func__, \ |
|---|
| 702 | lineptr, n, delim, fd, (long int)ret); \ |
|---|
| 703 | else \ |
|---|
| 704 | debug("%s(%p, %p, [%i]) = %li", __func__, \ |
|---|
| 705 | lineptr, n, fd, (long int)ret); \ |
|---|
| 706 | return ret; \ |
|---|
| 707 | } while(0) |
|---|
| 708 | |
|---|
| 709 | #if defined HAVE_GETLINE |
|---|
| 710 | ssize_t NEW(getline)(char **lineptr, size_t *n, FILE *stream) |
|---|
| 711 | { |
|---|
| 712 | ssize_t ret; GETDELIM(getline, '\n', 0); return ret; |
|---|
| 713 | } |
|---|
| 714 | #endif |
|---|
| 715 | |
|---|
| 716 | #if defined HAVE_GETDELIM |
|---|
| 717 | ssize_t NEW(getdelim)(char **lineptr, size_t *n, int delim, FILE *stream) |
|---|
| 718 | { |
|---|
| 719 | ssize_t ret; GETDELIM(getdelim, delim, 1); return ret; |
|---|
| 720 | } |
|---|
| 721 | #endif |
|---|
| 722 | |
|---|
| 723 | #if defined HAVE___GETDELIM |
|---|
| 724 | ssize_t NEW(__getdelim)(char **lineptr, size_t *n, int delim, FILE *stream) |
|---|
| 725 | { |
|---|
| 726 | ssize_t ret; GETDELIM(__getdelim, delim, 1); return ret; |
|---|
| 727 | } |
|---|
| 728 | #endif |
|---|
| 729 | |
|---|
| 730 | #if defined HAVE_FGETLN |
|---|
| 731 | char *NEW(fgetln)(FILE *stream, size_t *len) |
|---|
| 732 | { |
|---|
| 733 | char *ret; |
|---|
| 734 | #if defined REFILL_ONLY_STDIO /* Don't fuzz or seek if we have __srefill() */ |
|---|
| 735 | #else |
|---|
| 736 | struct fuzz *fuzz; |
|---|
| 737 | size_t i, size; |
|---|
| 738 | #endif |
|---|
| 739 | int fd; |
|---|
| 740 | |
|---|
| 741 | LOADSYM(fgetln); |
|---|
| 742 | LOADSYM(fgetc); |
|---|
| 743 | fd = fileno(stream); |
|---|
| 744 | if(!_zz_ready || !_zz_iswatched(fd) || !_zz_isactive(fd)) |
|---|
| 745 | return ORIG(fgetln)(stream, len); |
|---|
| 746 | |
|---|
| 747 | #if defined REFILL_ONLY_STDIO /* Don't fuzz or seek if we have __srefill() */ |
|---|
| 748 | _zz_lock(fd); |
|---|
| 749 | ret = ORIG(fgetln)(stream, len); |
|---|
| 750 | _zz_unlock(fd); |
|---|
| 751 | #else |
|---|
| 752 | fuzz = _zz_getfuzz(fd); |
|---|
| 753 | |
|---|
| 754 | for(i = size = 0; ; /* i is incremented below */) |
|---|
| 755 | { |
|---|
| 756 | int ch; |
|---|
| 757 | |
|---|
| 758 | _zz_lock(fd); |
|---|
| 759 | ch = ORIG(fgetc)(stream); |
|---|
| 760 | _zz_unlock(fd); |
|---|
| 761 | |
|---|
| 762 | if(ch == EOF) |
|---|
| 763 | break; |
|---|
| 764 | |
|---|
| 765 | if(i >= size) |
|---|
| 766 | fuzz->tmp = realloc(fuzz->tmp, (size += 80)); |
|---|
| 767 | |
|---|
| 768 | fuzz->tmp[i] = (char)(unsigned char)ch; |
|---|
| 769 | _zz_fuzz(fd, (uint8_t *)fuzz->tmp + i, 1); /* rather inefficient */ |
|---|
| 770 | _zz_addpos(fd, 1); |
|---|
| 771 | |
|---|
| 772 | if(fuzz->tmp[i++] == '\n') |
|---|
| 773 | break; |
|---|
| 774 | } |
|---|
| 775 | |
|---|
| 776 | *len = i; |
|---|
| 777 | ret = fuzz->tmp; |
|---|
| 778 | #endif |
|---|
| 779 | |
|---|
| 780 | debug("%s([%i], &%li) = %p", __func__, fd, (long int)*len, ret); |
|---|
| 781 | return ret; |
|---|
| 782 | } |
|---|
| 783 | #endif |
|---|
| 784 | |
|---|
| 785 | #define REFILL(fn, fn_advances) \ |
|---|
| 786 | do \ |
|---|
| 787 | { \ |
|---|
| 788 | int64_t pos; \ |
|---|
| 789 | off_t newpos; \ |
|---|
| 790 | int fd; \ |
|---|
| 791 | LOADSYM(fn); \ |
|---|
| 792 | fd = fileno(fp); \ |
|---|
| 793 | if(!_zz_ready || !_zz_iswatched(fd) || !_zz_isactive(fd)) \ |
|---|
| 794 | return ORIG(fn)(fp); \ |
|---|
| 795 | pos = _zz_getpos(fd); \ |
|---|
| 796 | _zz_lock(fd); \ |
|---|
| 797 | ret = ORIG(fn)(fp); \ |
|---|
| 798 | newpos = lseek(fd, 0, SEEK_CUR); \ |
|---|
| 799 | _zz_unlock(fd); \ |
|---|
| 800 | if(ret != EOF) \ |
|---|
| 801 | { \ |
|---|
| 802 | int already_fuzzed = 0; \ |
|---|
| 803 | if(fn_advances) \ |
|---|
| 804 | { \ |
|---|
| 805 | uint8_t ch = (uint8_t)(unsigned int)ret; \ |
|---|
| 806 | if(newpos != -1) \ |
|---|
| 807 | _zz_setpos(fd, newpos - fp->FILE_CNT - 1); \ |
|---|
| 808 | already_fuzzed = _zz_getfuzzed(fd); \ |
|---|
| 809 | _zz_fuzz(fd, &ch, 1); \ |
|---|
| 810 | ret = fp->FILE_PTR[-1] = ch; \ |
|---|
| 811 | _zz_setfuzzed(fd, fp->FILE_CNT + 1); \ |
|---|
| 812 | _zz_addpos(fd, 1); \ |
|---|
| 813 | } \ |
|---|
| 814 | else \ |
|---|
| 815 | { \ |
|---|
| 816 | _zz_setfuzzed(fd, fp->FILE_CNT); \ |
|---|
| 817 | if(newpos != -1) \ |
|---|
| 818 | _zz_setpos(fd, newpos - fp->FILE_CNT); \ |
|---|
| 819 | } \ |
|---|
| 820 | if(fp->FILE_CNT > already_fuzzed) \ |
|---|
| 821 | { \ |
|---|
| 822 | _zz_addpos(fd, already_fuzzed); \ |
|---|
| 823 | _zz_fuzz(fd, fp->FILE_PTR, fp->FILE_CNT - already_fuzzed); \ |
|---|
| 824 | } \ |
|---|
| 825 | _zz_addpos(fd, fp->FILE_CNT - already_fuzzed); \ |
|---|
| 826 | } \ |
|---|
| 827 | _zz_setpos(fd, pos); /* FIXME: do we always need to do this? */ \ |
|---|
| 828 | debug("%s([%i]) = %i", __func__, fd, ret); \ |
|---|
| 829 | } \ |
|---|
| 830 | while(0) |
|---|
| 831 | |
|---|
| 832 | #if defined HAVE___SREFILL |
|---|
| 833 | int NEW(__srefill)(FILE *fp) |
|---|
| 834 | { |
|---|
| 835 | int ret; REFILL(__srefill, 0); return ret; |
|---|
| 836 | } |
|---|
| 837 | #endif |
|---|
| 838 | |
|---|
| 839 | #if defined HAVE___SRGET && !defined HAVE___SREFILL |
|---|
| 840 | int NEW(__srget)(FILE *fp) |
|---|
| 841 | { |
|---|
| 842 | int ret; REFILL(__srget, 1); return ret; |
|---|
| 843 | } |
|---|
| 844 | #endif |
|---|
| 845 | |
|---|
| 846 | #if defined HAVE___FILBUF |
|---|
| 847 | int NEW(__filbuf)(FILE *fp) |
|---|
| 848 | { |
|---|
| 849 | int ret; REFILL(__filbuf, 1); return ret; |
|---|
| 850 | } |
|---|
| 851 | #endif |
|---|
| 852 | |
|---|