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// Copyright 2014 The Bazel Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "src/main/native/unix_jni.h"
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/sysctl.h>
#include <sys/syslimits.h>
#include <sys/types.h>
#include <sys/xattr.h>
#include <string>
const int PATH_MAX2 = PATH_MAX * 2;
using std::string;
// See unix_jni.h.
string ErrorMessage(int error_number) {
char buf[1024] = "";
if (strerror_r(error_number, buf, sizeof buf) < 0) {
snprintf(buf, sizeof buf, "strerror_r(%d): errno %d", error_number, errno);
}
return string(buf);
}
int portable_fstatat(
int dirfd, char *name, portable_stat_struct *statbuf, int flags) {
char dirPath[PATH_MAX2]; // Have enough room for relative path
// No fstatat under darwin, simulate it
if (flags != 0) {
// We don't support any flags
errno = ENOSYS;
return -1;
}
if (strlen(name) == 0 || name[0] == '/') {
// Absolute path, simply stat
return portable_stat(name, statbuf);
}
// Relative path, construct an absolute path
if (fcntl(dirfd, F_GETPATH, dirPath) == -1) {
return -1;
}
int l = strlen(dirPath);
if (dirPath[l-1] != '/') {
// dirPath is twice the PATH_MAX size, we always have room for the extra /
dirPath[l] = '/';
dirPath[l+1] = 0;
l++;
}
strncat(dirPath, name, PATH_MAX2-l-1);
char *newpath = realpath(dirPath, NULL); // this resolve the relative path
if (newpath == NULL) {
return -1;
}
int r = portable_stat(newpath, statbuf);
free(newpath);
return r;
}
int StatSeconds(const portable_stat_struct &statbuf, StatTimes t) {
switch (t) {
case STAT_ATIME:
return statbuf.st_atime;
case STAT_CTIME:
return statbuf.st_ctime;
case STAT_MTIME:
return statbuf.st_mtime;
default:
CHECK(false);
}
}
int StatNanoSeconds(const portable_stat_struct &statbuf, StatTimes t) {
switch (t) {
case STAT_ATIME:
return statbuf.st_atimespec.tv_nsec;
case STAT_CTIME:
return statbuf.st_ctimespec.tv_nsec;
case STAT_MTIME:
return statbuf.st_mtimespec.tv_nsec;
default:
CHECK(false);
}
}
ssize_t portable_getxattr(const char *path, const char *name, void *value,
size_t size) {
return getxattr(path, name, value, size, 0, 0);
}
ssize_t portable_lgetxattr(const char *path, const char *name, void *value,
size_t size) {
return getxattr(path, name, value, size, 0, XATTR_NOFOLLOW);
}
int portable_sysctlbyname(const char *name_chars, long *mibp, size_t *sizep) {
return sysctlbyname(name_chars, mibp, sizep, NULL, 0);
}
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