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/*
* Copyright (c) 2017 Cisco and/or its affiliates.
* 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 <config.h>
#include <stdio.h>
#include <inttypes.h>
#include <stdlib.h>
#include <poll.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/param.h>
#include <sys/resource.h>
#include <string.h>
#include <LongBow/private/longBow_OpenFile.h>
#include <LongBow/private/longBow_Memory.h>
#include <LongBow/private/longBow_String.h>
struct longbow_openfile {
char *fullPathName;
struct stat statbuf;
int fd;
};
#if defined(_WIN64)
static char *
_getFullPathNameFromFd(int fd)
{
return strdup("./");
}
#elif defined(_WIN32)
static char *
_getFullPathNameFromFd(int fd)
{
return strdup("./");
}
#elif defined(__APPLE__)
static char *
_getFullPathNameFromFd(int fd)
{
char filePath[PATH_MAX];
if (fcntl(fd, F_GETPATH, filePath) != -1) {
return strdup(filePath);
}
return NULL;
}
#elif defined(__linux)
static char *
_getFullPathNameFromFd(int fd)
{
return strdup("./");
}
#elif defined(__unix) // all unices not caught above
static char *
_getFullPathNameFromFd(int fd)
{
return strdup("./");
}
#elif defined(__posix)
static char *
_getFullPathNameFromFd(int fd)
{
return strdup("./");
}
#endif
LongBowOpenFile *
longBowOpenFile_Create(int fd)
{
LongBowOpenFile *result = longBowMemory_Allocate(sizeof(LongBowOpenFile));
if (result != NULL) {
result->fd = fd;
if (fstat(fd, &result->statbuf) == 0) {
result->fullPathName = _getFullPathNameFromFd(fd);
}
}
return result;
}
void
longBowOpenFile_Destroy(LongBowOpenFile **openFilePtr)
{
longBowMemory_Deallocate((void **) openFilePtr);
}
char *
longBowOpenFile_StructStatToString(const struct stat *statbuf)
{
LongBowString *string = longBowString_CreateFormat("0x%" PRIx16 " %3ld %10d %10d %6lld",
statbuf->st_mode,
(long) statbuf->st_nlink,
statbuf->st_uid,
statbuf->st_gid,
(long long) statbuf->st_size);
char *result = longBowString_ToString(string);
return result;
}
char *
longBowOpenFile_ToString(LongBowOpenFile *openFile)
{
char *statString = longBowOpenFile_StructStatToString(&(openFile->statbuf));
LongBowString *string = longBowString_CreateFormat("%d %s %s", openFile->fd, statString, openFile->fullPathName);
free(statString);
char *result = longBowString_ToString(string);
return result;
}
LongBowArrayList *
longBowOpenFile_CurrentlyOpen(void)
{
struct rlimit rlimit;
bool success = getrlimit(RLIMIT_NOFILE, &rlimit) == 0;
if (!success) {
return NULL;
}
// Here is a potential problem: struct rlimit specifies rlim_cur as a 64 bit value (rlim_t), but poll only takes an
// unsigned int's worth of file descriptors.
LongBowArrayList *list = longBowArrayList_Create(longBowArrayList_StdlibFreeFunction);
for (nfds_t i = 0; i < (nfds_t) rlimit.rlim_cur; i++) {
int flags = fcntl((int) i, F_GETFD);
if (flags != -1) {
LongBowOpenFile *openFile = longBowOpenFile_Create((int) i);
longBowArrayList_Add(list, openFile);
}
}
return list;
}
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