kernel_intercept.cc revision 58e6fbe4ee35d65e14b626c557d37565bf8ad179
1// Copyright (c) 2012 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5#include <errno.h> 6 7#include "nacl_io/kernel_intercept.h" 8#include "nacl_io/kernel_proxy.h" 9#include "nacl_io/kernel_wrap.h" 10#include "nacl_io/osmman.h" 11#include "nacl_io/pepper_interface.h" 12#include "nacl_io/pepper_interface.h" 13#include "nacl_io/real_pepper_interface.h" 14 15using namespace nacl_io; 16 17#define ON_NOSYS_RETURN(x) \ 18 if (!ki_is_initialized()) { \ 19 errno = ENOSYS; \ 20 return x; \ 21 } 22 23static KernelProxy* s_kp; 24 25void ki_init(void* kp) { 26 ki_init_ppapi(kp, 0, NULL); 27} 28 29void ki_init_ppapi(void* kp, 30 PP_Instance instance, 31 PPB_GetInterface get_browser_interface) { 32 kernel_wrap_init(); 33 34 if (kp == NULL) kp = new KernelProxy(); 35 s_kp = static_cast<KernelProxy*>(kp); 36 37 PepperInterface* ppapi = NULL; 38 if (instance && get_browser_interface) 39 ppapi = new RealPepperInterface(instance, get_browser_interface); 40 41 s_kp->Init(ppapi); 42} 43 44int ki_is_initialized() { 45 return s_kp != NULL; 46} 47 48void ki_uninit() { 49 kernel_wrap_uninit(); 50 s_kp = NULL; 51} 52 53 54int ki_chdir(const char* path) { 55 ON_NOSYS_RETURN(-1); 56 return s_kp->chdir(path); 57} 58 59char* ki_getcwd(char* buf, size_t size) { 60 // gtest uses getcwd in a static initializer. If we haven't initialized the 61 // kernel-intercept yet, just return ".". 62 if (!ki_is_initialized()) { 63 if (size < 2) { 64 errno = ERANGE; 65 return NULL; 66 } 67 buf[0] = '.'; 68 buf[1] = 0; 69 return buf; 70 } 71 return s_kp->getcwd(buf, size); 72} 73 74char* ki_getwd(char* buf) { 75 ON_NOSYS_RETURN(NULL); 76 return s_kp->getwd(buf); 77} 78 79int ki_dup(int oldfd) { 80 ON_NOSYS_RETURN(-1); 81 return s_kp->dup(oldfd); 82} 83 84int ki_dup2(int oldfd, int newfd) { 85 ON_NOSYS_RETURN(-1); 86 return s_kp->dup2(oldfd, newfd); 87} 88 89int ki_chmod(const char *path, mode_t mode) { 90 ON_NOSYS_RETURN(-1); 91 return s_kp->chmod(path, mode); 92} 93 94int ki_stat(const char *path, struct stat *buf) { 95 ON_NOSYS_RETURN(-1); 96 return s_kp->stat(path, buf); 97} 98 99int ki_mkdir(const char *path, mode_t mode) { 100 ON_NOSYS_RETURN(-1); 101 return s_kp->mkdir(path, mode); 102} 103 104int ki_rmdir(const char *path) { 105 ON_NOSYS_RETURN(-1); 106 return s_kp->rmdir(path); 107} 108 109int ki_mount(const char *source, const char *target, const char *filesystemtype, 110 unsigned long mountflags, const void *data) { 111 ON_NOSYS_RETURN(-1); 112 return s_kp->mount(source, target, filesystemtype, mountflags, data); 113} 114 115int ki_umount(const char *path) { 116 ON_NOSYS_RETURN(-1); 117 return s_kp->umount(path); 118} 119 120int ki_open(const char *path, int oflag) { 121 ON_NOSYS_RETURN(-1); 122 return s_kp->open(path, oflag); 123} 124 125ssize_t ki_read(int fd, void *buf, size_t nbyte) { 126 ON_NOSYS_RETURN(-1); 127 return s_kp->read(fd, buf, nbyte); 128} 129 130ssize_t ki_write(int fd, const void *buf, size_t nbyte) { 131 ON_NOSYS_RETURN(-1); 132 return s_kp->write(fd, buf, nbyte); 133} 134 135int ki_fstat(int fd, struct stat *buf){ 136 ON_NOSYS_RETURN(-1); 137 return s_kp->fstat(fd, buf); 138} 139 140int ki_getdents(int fd, void *buf, unsigned int count) { 141 ON_NOSYS_RETURN(-1); 142 return s_kp->getdents(fd, buf, count); 143} 144 145int ki_ftruncate(int fd, off_t length) { 146 ON_NOSYS_RETURN(-1); 147 return s_kp->ftruncate(fd, length); 148} 149 150int ki_fsync(int fd) { 151 ON_NOSYS_RETURN(-1); 152 return s_kp->fsync(fd); 153} 154 155int ki_isatty(int fd) { 156 ON_NOSYS_RETURN(0); 157 return s_kp->isatty(fd); 158} 159 160int ki_close(int fd) { 161 ON_NOSYS_RETURN(-1); 162 return s_kp->close(fd); 163} 164 165off_t ki_lseek(int fd, off_t offset, int whence) { 166 ON_NOSYS_RETURN(-1); 167 return s_kp->lseek(fd, offset, whence); 168} 169 170int ki_remove(const char* path) { 171 ON_NOSYS_RETURN(-1); 172 return s_kp->remove(path); 173} 174 175int ki_unlink(const char* path) { 176 ON_NOSYS_RETURN(-1); 177 return s_kp->unlink(path); 178} 179 180int ki_access(const char* path, int amode) { 181 ON_NOSYS_RETURN(-1); 182 return s_kp->access(path, amode); 183} 184 185int ki_link(const char* oldpath, const char* newpath) { 186 ON_NOSYS_RETURN(-1); 187 return s_kp->link(oldpath, newpath); 188} 189 190int ki_symlink(const char* oldpath, const char* newpath) { 191 ON_NOSYS_RETURN(-1); 192 return s_kp->symlink(oldpath, newpath); 193} 194 195void* ki_mmap(void* addr, size_t length, int prot, int flags, int fd, 196 off_t offset) { 197 ON_NOSYS_RETURN(MAP_FAILED); 198 return s_kp->mmap(addr, length, prot, flags, fd, offset); 199} 200 201int ki_munmap(void* addr, size_t length) { 202 ON_NOSYS_RETURN(-1); 203 return s_kp->munmap(addr, length); 204} 205 206int ki_open_resource(const char* file) { 207 ON_NOSYS_RETURN(-1); return s_kp->open_resource(file); 208} 209 210int ki_ioctl(int d, int request, char* argp) { 211 ON_NOSYS_RETURN(-1); 212 return s_kp->ioctl(d, request, argp); 213} 214 215int ki_chown(const char* path, uid_t owner, gid_t group) { 216 ON_NOSYS_RETURN(-1); 217 return s_kp->chown(path, owner, group); 218} 219 220int ki_fchown(int fd, uid_t owner, gid_t group) { 221 ON_NOSYS_RETURN(-1); 222 return s_kp->fchown(fd, owner, group); 223} 224 225int ki_lchown(const char* path, uid_t owner, gid_t group) { 226 ON_NOSYS_RETURN(-1); 227 return s_kp->lchown(path, owner, group); 228} 229 230int ki_utime(const char* filename, const struct utimbuf* times) { 231 ON_NOSYS_RETURN(-1); 232 return s_kp->utime(filename, times); 233} 234