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gecko-dev/xpcom/io/nsLocalFileUnix.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (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.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is Mozilla Communicator client code,
* released March 31, 1998.
*
* The Initial Developer of the Original Code is Netscape Communications
* Corporation. Portions created by Netscape are
* Copyright (C) 1998-1999 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
* Mike Shaver <shaver@mozilla.org>
* Christopher Blizzard <blizzard@mozilla.org>
* Jason Eager <jce2@po.cwru.edu>
* Stuart Parmenter <pavlov@netscape.com>
*/
/*
* Implementation of nsIFile for ``Unixy'' systems.
*/
/* we're going to need some autoconf loving, I can just tell */
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <utime.h>
#include <dirent.h>
#include <ctype.h>
#ifdef XP_BEOS
#include <Path.h>
#include <Entry.h>
#endif
#include "nsCRT.h"
#include "nsCOMPtr.h"
#include "nsMemory.h"
#include "nsIFile.h"
#include "nsILocalFile.h"
#include "nsLocalFileUnix.h"
#include "nsIComponentManager.h"
#include "nsString.h"
#include "prproces.h"
// we need these for statfs()
#ifdef HAVE_SYS_STATVFS_H
#if defined(__osf__) && defined(__DECCXX)
extern "C" int statvfs(const char *, struct statvfs *);
#endif
#include <sys/statvfs.h>
#endif
#ifdef HAVE_SYS_STATFS_H
#include <sys/statfs.h>
#endif
#ifdef HAVE_STATVFS
#define STATFS statvfs
#else
#define STATFS statfs
#endif
// On some platforms file/directory name comparisons need to
// be case-blind.
#if defined(VMS)
#define FILE_STRCMP strcasecmp
#define FILE_STRNCMP strncasecmp
#else
#define FILE_STRCMP strcmp
#define FILE_STRNCMP strncmp
#endif
#define VALIDATE_STAT_CACHE() \
PR_BEGIN_MACRO \
if (!mHaveCachedStat) { \
FillStatCache(); \
if (!mHaveCachedStat) \
return NSRESULT_FOR_ERRNO(); \
} \
PR_END_MACRO
#define CHECK_mPath() \
PR_BEGIN_MACRO \
if (!(const char *)mPath) \
return NS_ERROR_NOT_INITIALIZED; \
PR_END_MACRO
#define mLL_II2L(hi, lo, res) \
LL_I2L(res, hi); \
LL_SHL(res, res, 32); \
LL_ADD(res, res, lo);
#define mLL_L2II(a64, hi, lo) \
PR_BEGIN_MACRO \
PRInt64 tmp; \
LL_SHR(tmp, a64, 32); \
LL_L2I(hi, tmp); \
LL_SHL(tmp, a64, 32); \
LL_SHR(tmp, tmp, 32); \
LL_L2I(lo, tmp); \
PR_END_MACRO
/* directory enumerator */
class NS_COM
nsDirEnumeratorUnix : public nsISimpleEnumerator
{
public:
nsDirEnumeratorUnix();
virtual ~nsDirEnumeratorUnix();
// nsISupports interface
NS_DECL_ISUPPORTS
// nsISimpleEnumerator interface
NS_DECL_NSISIMPLEENUMERATOR
NS_IMETHOD Init(nsIFile *parent, PRBool ignored);
protected:
NS_IMETHOD GetNextEntry();
DIR *mDir;
struct dirent *mEntry;
nsXPIDLCString mParentPath;
};
nsDirEnumeratorUnix::nsDirEnumeratorUnix() :
mDir(nsnull), mEntry(nsnull)
{
NS_INIT_REFCNT();
}
nsDirEnumeratorUnix::~nsDirEnumeratorUnix()
{
if (mDir)
closedir(mDir);
}
NS_IMPL_ISUPPORTS1(nsDirEnumeratorUnix, nsISimpleEnumerator)
NS_IMETHODIMP
nsDirEnumeratorUnix::Init(nsIFile *parent, PRBool resolveSymlinks /*ignored*/)
{
nsXPIDLCString dirPath;
if (NS_FAILED(parent->GetPath(getter_Copies(dirPath))) ||
(const char *)dirPath == 0)
return NS_ERROR_FILE_INVALID_PATH;
if (NS_FAILED(parent->GetPath(getter_Copies(mParentPath))))
return NS_ERROR_FAILURE;
mDir = opendir(dirPath);
if (!mDir)
return NSRESULT_FOR_ERRNO();
return GetNextEntry();
}
NS_IMETHODIMP
nsDirEnumeratorUnix::HasMoreElements(PRBool *result)
{
*result = mDir && mEntry;
return NS_OK;
}
NS_IMETHODIMP
nsDirEnumeratorUnix::GetNext(nsISupports **_retval)
{
nsresult rv;
if (!mDir || !mEntry) {
*_retval = nsnull;
return NS_OK;
}
nsCOMPtr<nsILocalFile> file = new nsLocalFile();
if (!file)
return NS_ERROR_OUT_OF_MEMORY;
if (NS_FAILED(rv = file->InitWithPath(mParentPath)) ||
NS_FAILED(rv = file->Append(mEntry->d_name))) {
return rv;
}
*_retval = file;
NS_ADDREF(*_retval);
return GetNextEntry();
}
NS_IMETHODIMP
nsDirEnumeratorUnix::GetNextEntry()
{
do {
errno = 0;
mEntry = readdir(mDir);
/* end of dir or error */
if (!mEntry)
return NSRESULT_FOR_ERRNO();
/* keep going past "." and ".." */
} while (mEntry->d_name[0] == '.' &&
(mEntry->d_name[1] == '\0' || /* .\0 */
(mEntry->d_name[1] == '.' &&
mEntry->d_name[2] == '\0'))); /* ..\0 */
return NS_OK;
}
nsLocalFile::nsLocalFile() :
mHaveCachedStat(PR_FALSE)
{
mPath = "";
NS_INIT_REFCNT();
}
nsLocalFile::~nsLocalFile()
{
}
NS_IMPL_THREADSAFE_ISUPPORTS2(nsLocalFile, nsILocalFile, nsIFile)
nsresult
nsLocalFile::nsLocalFileConstructor(nsISupports *outer, const nsIID &aIID, void **aInstancePtr)
{
NS_ENSURE_ARG_POINTER(aInstancePtr);
NS_ENSURE_NO_AGGREGATION(outer);
*aInstancePtr = 0;
nsCOMPtr<nsIFile> inst = new nsLocalFile();
if (!inst)
return NS_ERROR_OUT_OF_MEMORY;
return inst->QueryInterface(aIID, aInstancePtr);
}
NS_IMETHODIMP
nsLocalFile::Clone(nsIFile **file)
{
nsresult rv;
NS_ENSURE_ARG(file);
*file = nsnull;
nsCOMPtr<nsILocalFile> localFile = new nsLocalFile();
if (localFile == nsnull)
return NS_ERROR_OUT_OF_MEMORY;
rv = localFile->InitWithPath(mPath);
if (NS_FAILED(rv))
return rv;
*file = localFile;
NS_ADDREF(*file);
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::InitWithPath(const char *filePath)
{
NS_ENSURE_ARG(filePath);
int len = strlen(filePath);
char* name = (char*) nsMemory::Clone( filePath, len+1 );
if (name[len-1] == '/') {
if (len != 1)
name[len-1] = '\0';
}
mPath = name;
nsMemory::Free(name);
InvalidateCache();
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::CreateAllAncestors(PRUint32 permissions)
{
/* <jband> I promise to play nice */
char *buffer = NS_CONST_CAST(char *, (const char *)mPath),
*ptr = buffer;
#ifdef DEBUG_NSIFILE
fprintf(stderr, "nsIFile: before: %s\n", buffer);
#endif
while ((ptr = strchr(ptr + 1, '/'))) {
/*
* Sequences of '/' are equivalent to a single '/'.
*/
if (ptr[1] == '/')
continue;
/*
* If the path has a trailing slash, don't make the last component here,
* because we'll get EEXISTS in Create when we try to build the final
* component again, and it's easier to condition the logic here than
* there.
*/
if (!ptr[1])
break;
/* Temporarily NUL-terminate here */
*ptr = '\0';
#ifdef DEBUG_NSIFILE
fprintf(stderr, "nsIFile: mkdir(\"%s\")\n", buffer);
#endif
int result = mkdir(buffer, permissions);
/* Put the / back before we (maybe) return */
*ptr = '/';
/*
* We could get EEXISTS for an existing file -- not directory --
* with the name of one of our ancestors, but that's OK: we'll get
* ENOTDIR when we try to make the next component in the path,
* either here on back in Create, and error out appropriately.
*/
if (result == -1 && errno != EEXIST)
return NSRESULT_FOR_ERRNO();
}
#ifdef DEBUG_NSIFILE
fprintf(stderr, "nsIFile: after: %s\n", buffer);
#endif
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::OpenNSPRFileDesc(PRInt32 flags, PRInt32 mode, PRFileDesc **_retval)
{
CHECK_mPath();
*_retval = PR_Open(mPath, flags, mode);
if (*_retval)
return NS_OK;
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsLocalFile::OpenANSIFileDesc(const char *mode, FILE * *_retval)
{
CHECK_mPath();
*_retval = fopen(mPath, mode);
if (*_retval)
return NS_OK;
return NS_ERROR_FAILURE;
}
static int exclusive_create(const char * path, mode_t mode) {
return open(path, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, mode);
}
static int exclusive_mkdir(const char * path, mode_t mode) {
return mkdir(path, mode);
}
NS_IMETHODIMP
nsLocalFile::Create(PRUint32 type, PRUint32 permissions)
{
CHECK_mPath();
if (type != NORMAL_FILE_TYPE && type != DIRECTORY_TYPE)
return NS_ERROR_FILE_UNKNOWN_TYPE;
int result;
/* use creat(2) for NORMAL_FILE, mkdir(2) for DIRECTORY */
int (*creationFunc)(const char *, mode_t) =
type == NORMAL_FILE_TYPE ? exclusive_create : exclusive_mkdir;
result = creationFunc((const char *)mPath, permissions);
if (result == -1 && errno == ENOENT) {
/*
* If we failed because of missing ancestor components, try to create
* them and then retry the original creation.
*
* Ancestor directories get the same permissions as the file we're
* creating, with the X bit set for each of (user,group,other) with
* an R bit in the original permissions. If you want to do anything
* fancy like setgid or sticky bits, do it by hand.
*/
int dirperm = permissions;
if (permissions & S_IRUSR)
dirperm |= S_IXUSR;
if (permissions & S_IRGRP)
dirperm |= S_IXGRP;
if (permissions & S_IROTH)
dirperm |= S_IXOTH;
#ifdef DEBUG_NSIFILE
fprintf(stderr, "nsIFile: perm = %o, dirperm = %o\n", permissions,
dirperm);
#endif
if (NS_FAILED(CreateAllAncestors(dirperm)))
return NS_ERROR_FAILURE;
#ifdef DEBUG_NSIFILE
fprintf(stderr, "nsIFile: Create(\"%s\") again\n", (const char *)mPath);
#endif
result = creationFunc((const char *)mPath, permissions);
}
/* creat(2) leaves the file open */
if (result >= 0 && type == NORMAL_FILE_TYPE) {
close(result);
return NS_OK;
}
return NSRESULT_FOR_RETURN(result);
}
NS_IMETHODIMP
nsLocalFile::Append(const char *fragment)
{
NS_ENSURE_ARG(fragment);
CHECK_mPath();
// only one component of path can be appended
if (strstr(fragment, "/") != nsnull)
{
return NS_ERROR_FILE_UNRECOGNIZED_PATH;
}
return AppendRelativePath(fragment);
}
NS_IMETHODIMP
nsLocalFile::AppendRelativePath(const char *fragment)
{
NS_ENSURE_ARG(fragment);
CHECK_mPath();
// Cannot start with a '/' and no .. allowed in the fragment
if ((*fragment == '/') || (strstr(fragment, "..") != nsnull))
{
return NS_ERROR_FILE_UNRECOGNIZED_PATH;
}
char * newPath = (char *)nsMemory::Alloc(strlen(mPath) +
strlen(fragment) + 2);
if (!newPath)
return NS_ERROR_OUT_OF_MEMORY;
strcpy(newPath, mPath);
strcat(newPath, "/");
strcat(newPath, fragment);
mPath = newPath;
InvalidateCache();
nsMemory::Free(newPath);
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::Normalize()
{
char resolved_path[PATH_MAX];
char *resolved_path_ptr = NULL;
CHECK_mPath();
#ifdef XP_BEOS
BEntry be_e((const char*)mPath, true);
BPath be_p;
status_t err;
if ((err = be_e.GetPath(&be_p)) == B_OK) {
resolved_path_ptr = be_p.Path();
};
#else
resolved_path_ptr = realpath((const char *)mPath, resolved_path);
#endif
// if there is an error, the return is null.
if (resolved_path_ptr == NULL) {
return NSRESULT_FOR_ERRNO();
}
// nsXPIDLCString will copy.
mPath = resolved_path;
return NS_OK;
}
nsresult
nsLocalFile::GetLeafNameRaw(const char **_retval)
{
CHECK_mPath();
const char *leafName = strrchr((const char *)mPath, '/');
if (!leafName)
return NS_ERROR_FILE_INVALID_PATH;
*_retval = leafName+1;
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::GetLeafName(char **aLeafName)
{
NS_ENSURE_ARG_POINTER(aLeafName);
nsresult rv;
const char *leafName;
if (NS_FAILED(rv = GetLeafNameRaw(&leafName)))
return rv;
*aLeafName = nsCRT::strdup(leafName);
if (!*aLeafName)
return NS_ERROR_OUT_OF_MEMORY;
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::SetLeafName(const char *aLeafName)
{
NS_ENSURE_ARG(aLeafName);
CHECK_mPath();
nsresult rv;
char *leafName;
if (NS_FAILED(rv = GetLeafNameRaw((const char**)&leafName)))
return rv;
char* newPath = (char *)nsMemory::Alloc(strlen(mPath) +
strlen(aLeafName) + 2);
*leafName = 0;
strcpy(newPath, mPath);
strcat(newPath, "/");
strcat(newPath, aLeafName);
mPath = newPath;
InvalidateCache();
nsMemory::Free(newPath);
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::GetPath(char **_retval)
{
NS_ENSURE_ARG_POINTER(_retval);
if (!(const char *)mPath) {
*_retval = nsnull;
return NS_OK;
}
*_retval = nsCRT::strdup((const char *)mPath);
if (!*_retval)
return NS_ERROR_OUT_OF_MEMORY;
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::CopyTo(nsIFile *newParent, const char *newName)
{
nsresult rv;
// check to make sure that we have a new parent
// or have a new name
if (newParent == nsnull && newName == nsnull)
return NS_ERROR_FILE_TARGET_DOES_NOT_EXIST;
// check to make sure that this has been initialized properly
CHECK_mPath();
// check to see if we are a directory or if we are a file
PRBool isDirectory;
IsDirectory(&isDirectory);
if (isDirectory)
{
// XXX
return NS_ERROR_NOT_IMPLEMENTED;
}
else
{
// ok, we're a file so this should be easy as pie.
// check to see if our target exists
PRBool targetExists;
newParent->Exists(&targetExists);
// check to see if we need to create it
if (targetExists == PR_FALSE)
{
// XXX create the new directory with some permissions
rv = newParent->Create(DIRECTORY_TYPE, 0755);
if (NS_FAILED(rv))
return rv;
}
// make sure that the target is actually a directory
PRBool targetIsDirectory;
newParent->IsDirectory(&targetIsDirectory);
if (targetIsDirectory == PR_FALSE)
return NS_ERROR_FILE_DESTINATION_NOT_DIR;
// ok, we got this far. create the name of the new file.
nsXPIDLCString leafName;
nsXPIDLCString newPath;
const char *tmpConstChar;
char *tmpChar;
// get the leaf name of the new file if a name isn't supplied.
if (newName == nsnull)
{
if (NS_FAILED(rv = GetLeafNameRaw(&tmpConstChar)))
return rv;
leafName = tmpConstChar;
}
else
{
leafName = newName;
}
// get the path name
if (NS_FAILED(rv = newParent->GetPath(&tmpChar)))
return rv;
// this is the full path to the dir of the new file
newPath = tmpChar;
nsMemory::Free(tmpChar);
// create the final name
char *newPathName;
newPathName = (char *)nsMemory::Alloc(strlen(newPath) + strlen(leafName) + 2);
if (!newPathName)
return NS_ERROR_OUT_OF_MEMORY;
strcpy(newPathName, newPath);
strcat(newPathName, "/");
strcat(newPathName, leafName);
#ifdef DEBUG_blizzard
printf("nsLocalFile::CopyTo() %s -> %s\n", (const char *)mPath, newPathName);
#endif
nsXPIDLCString newPathNameAuto;
newPathNameAuto = newPathName;
nsMemory::Free(newPathName);
// actually create the file.
nsLocalFile *newFile = new nsLocalFile();
newFile->AddRef(); // we own this.
if (newFile == nsnull)
{
return NS_ERROR_OUT_OF_MEMORY;
}
rv = newFile->InitWithPath(newPathNameAuto);
if (NS_FAILED(rv))
{
NS_RELEASE(newFile);
return rv;
}
// get the old permissions
PRUint32 myPerms;
GetPermissions(&myPerms);
// create the new file with the same permissions
rv = newFile->Create(NORMAL_FILE_TYPE, myPerms);
if (NS_FAILED(rv))
{
NS_RELEASE(newFile);
return rv;
}
// open the new file.
PRInt32 openFlags = PR_RDWR | PR_CREATE_FILE | PR_TRUNCATE;
PRInt32 modeFlags = myPerms;
PRFileDesc *newFD = nsnull;
rv = newFile->OpenNSPRFileDesc(openFlags, modeFlags, &newFD);
if (NS_FAILED(rv))
{
NS_RELEASE(newFile);
return rv;
}
if (newFD == nsnull)
{
NS_RELEASE(newFile);
NSRESULT_FOR_ERRNO();
}
// open the old file, too
openFlags = PR_RDONLY;
PRFileDesc *oldFD = nsnull;
rv = OpenNSPRFileDesc(openFlags, modeFlags, &oldFD);
// make sure to clean up properly
if (NS_FAILED(rv))
{
NS_RELEASE(newFile);
PR_Close(newFD);
return rv;
}
if (newFD == nsnull)
{
NS_RELEASE(newFile);
PR_Close(newFD);
NSRESULT_FOR_ERRNO();
}
// get the length of the file
PRStatus status;
PRFileInfo fileInfo;
status = PR_GetFileInfo(mPath, &fileInfo);
if (status != PR_SUCCESS)
{
NS_RELEASE(newFile);
PR_Close(newFD);
NSRESULT_FOR_ERRNO();
}
// get the size of the file.
PROffset32 fileSize;
fileSize = fileInfo.size;
PRInt32 bytesRead = 0;
PRInt32 bytesWritten = 0;
PRInt32 totalRead = 0;
PRInt32 totalWritten = 0;
char buf[BUFSIZ];
while(1)
{
bytesRead = PR_Read(oldFD, &buf, BUFSIZ);
if (bytesRead == 0)
break;
if (bytesRead == -1)
return NS_ERROR_FAILURE;
totalRead += bytesRead;
bytesWritten = PR_Write(newFD, &buf, bytesRead);
if (bytesWritten == -1)
return NS_ERROR_FAILURE;
totalWritten += bytesWritten;
}
#ifdef DEBUG_blizzard
printf("read %d bytes, wrote %d bytes\n",
totalRead, totalWritten);
#endif
// close the files
PR_Close(newFD);
PR_Close(oldFD);
// free our resources
NS_RELEASE(newFile);
}
return rv;
}
NS_IMETHODIMP
nsLocalFile::CopyToFollowingLinks(nsIFile *newParent, const char *newName)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsLocalFile::MoveTo(nsIFile *newParent, const char *newName)
{
nsresult rv = CopyTo(newParent, newName);
if (NS_SUCCEEDED(rv))
rv = Delete(PR_TRUE);
return rv;
}
NS_IMETHODIMP
nsLocalFile::Delete(PRBool recursive)
{
VALIDATE_STAT_CACHE();
PRBool isDir = S_ISDIR(mCachedStat.st_mode);
/* XXX ?
* if (!isDir && recursive)
* return NS_ERROR_INVALID_ARG;
*/
InvalidateCache();
if (isDir) {
if (recursive) {
nsDirEnumeratorUnix *dir = new nsDirEnumeratorUnix();
if (!dir)
return NS_ERROR_OUT_OF_MEMORY;
nsresult rv = dir->Init(this, PR_FALSE);
if (NS_FAILED(rv)) {
delete dir;
return rv;
}
nsCOMPtr<nsISimpleEnumerator> iterator;
iterator = do_QueryInterface(dir, &rv);
if (NS_FAILED(rv)) {
delete dir;
return rv;
}
PRBool more;
rv = iterator->HasMoreElements(&more);
while (NS_SUCCEEDED(rv) && more) {
nsCOMPtr<nsISupports> item;
nsCOMPtr<nsIFile> file;
rv = iterator->GetNext(getter_AddRefs(item));
if (NS_FAILED(rv))
return NS_ERROR_FAILURE;
file = do_QueryInterface(item, &rv);
if (NS_FAILED(rv))
return NS_ERROR_FAILURE;
if (NS_FAILED(rv = file->Delete(recursive)))
return rv;
rv = iterator->HasMoreElements(&more);
}
}
if (rmdir(mPath) == -1)
return NSRESULT_FOR_ERRNO();
} else {
if (unlink(mPath) == -1)
return NSRESULT_FOR_ERRNO();
}
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::GetLastModificationDate(PRInt64 *aLastModificationDate)
{
NS_ENSURE_ARG(aLastModificationDate);
CHECK_mPath();
PRFileInfo64 info;
if (PR_GetFileInfo64(mPath, &info) != PR_SUCCESS) {
return NSRESULT_FOR_ERRNO();
}
// PRTime is a 64 bit value
// microseconds -> milliseconds
*aLastModificationDate = info.modifyTime / PR_USEC_PER_MSEC;
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::SetLastModificationDate(PRInt64 aLastModificationDate)
{
int result;
if (aLastModificationDate) {
VALIDATE_STAT_CACHE();
struct utimbuf ut;
ut.actime = mCachedStat.st_atime;
// convert PRTime microsecs to unix seconds since the epoch
double dTime;
LL_L2D(dTime, aLastModificationDate);
ut.modtime = (time_t)( (PRUint32)(dTime / PR_MSEC_PER_SEC) );
result = utime(mPath, &ut);
} else {
result = utime(mPath, NULL);
}
InvalidateCache();
return NSRESULT_FOR_RETURN(result);
}
NS_IMETHODIMP
nsLocalFile::GetLastModificationDateOfLink(PRInt64 *aLastModificationDateOfLink)
{
NS_ENSURE_ARG(aLastModificationDateOfLink);
struct stat sbuf;
if (lstat(mPath, &sbuf) == -1)
return NSRESULT_FOR_ERRNO();
mLL_II2L(0, (PRUint32)sbuf.st_mtime, *aLastModificationDateOfLink);
// lstat returns st_mtime in seconds!
*aLastModificationDateOfLink *= PR_MSEC_PER_SEC;
return NS_OK;
}
/*
* utime(2) may or may not dereference symlinks, joy.
*/
NS_IMETHODIMP
nsLocalFile::SetLastModificationDateOfLink(PRInt64 aLastModificationDateOfLink)
{
return SetLastModificationDate(aLastModificationDateOfLink);
}
/*
* only send back permissions bits: maybe we want to send back the whole
* mode_t to permit checks against other file types?
*/
#define NORMALIZE_PERMS(mode) ((mode)& (S_IRWXU | S_IRWXG | S_IRWXO))
NS_IMETHODIMP
nsLocalFile::GetPermissions(PRUint32 *aPermissions)
{
NS_ENSURE_ARG(aPermissions);
VALIDATE_STAT_CACHE();
*aPermissions = NORMALIZE_PERMS(mCachedStat.st_mode);
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::GetPermissionsOfLink(PRUint32 *aPermissionsOfLink)
{
NS_ENSURE_ARG(aPermissionsOfLink);
struct stat sbuf;
if (lstat(mPath, &sbuf) == -1)
return NSRESULT_FOR_ERRNO();
*aPermissionsOfLink = NORMALIZE_PERMS(sbuf.st_mode);
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::SetPermissions(PRUint32 aPermissions)
{
InvalidateCache();
return NSRESULT_FOR_RETURN(chmod(mPath, aPermissions));
}
NS_IMETHODIMP
nsLocalFile::SetPermissionsOfLink(PRUint32 aPermissions)
{
return SetPermissions(aPermissions);
}
NS_IMETHODIMP
nsLocalFile::GetFileSize(PRInt64 *aFileSize)
{
NS_ENSURE_ARG_POINTER(aFileSize);
VALIDATE_STAT_CACHE();
/* XXX autoconf for and use stat64 if available */
if( S_ISDIR(mCachedStat.st_mode) )
{
mLL_II2L(0, (PRUint32)0, *aFileSize);
}
else
{
mLL_II2L(0, (PRUint32)mCachedStat.st_size, *aFileSize);
}
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::SetFileSize(PRInt64 aFileSize)
{
PRInt32 hi, lo;
mLL_L2II(aFileSize, hi, lo);
/* XXX truncate64? */
InvalidateCache();
if (truncate((const char *)mPath, (off_t)lo) == -1)
return NSRESULT_FOR_ERRNO();
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::GetFileSizeOfLink(PRInt64 *aFileSize)
{
NS_ENSURE_ARG(aFileSize);
struct stat sbuf;
if (lstat(mPath, &sbuf) == -1)
return NSRESULT_FOR_ERRNO();
/* XXX autoconf for and use lstat64 if available */
mLL_II2L(0, (PRInt32)sbuf.st_size, *aFileSize);
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::GetDiskSpaceAvailable(PRInt64 *aDiskSpaceAvailable)
{
NS_ENSURE_ARG_POINTER(aDiskSpaceAvailable);
PRInt64 bytesFree = 0;
//These systems have the operations necessary to check disk space.
#if defined(HAVE_SYS_STATFS_H) || defined(HAVE_SYS_STATVFS_H)
// check to make sure that mPath is properly initialized
CHECK_mPath();
struct STATFS fs_buf;
// Members of the STATFS struct that you should know about:
// f_bsize = block size on disk.
// f_bavail = number of free blocks available to a non-superuser.
// f_bfree = number of total free blocks in file system.
if (STATFS(mPath, &fs_buf) < 0)
// The call to STATFS failed.
{
#ifdef DEBUG
printf("ERROR: GetDiskSpaceAvailable: STATFS call FAILED. \n");
#endif
return NS_ERROR_FAILURE;
}
#ifdef DEBUG_DISK_SPACE
printf("DiskSpaceAvailable: %d bytes\n",
fs_buf.f_bsize * (fs_buf.f_bavail - 1));
#endif
// The number of Bytes free = The number of free blocks available to
// a non-superuser, minus one as a fudge factor, multiplied by the size
// of the beforementioned blocks.
LL_I2L( bytesFree, (fs_buf.f_bsize * (fs_buf.f_bavail - 1) ) );
*aDiskSpaceAvailable = bytesFree;
return NS_OK;
#else
/*
** This platform doesn't have statfs or statvfs.
** I'm sure that there's a way to check for free disk space
** on platforms that don't have statfs
** (I'm SURE they have df, for example).
**
** Until we figure out how to do that, lets be honest
** and say that this command isn't implemented
** properly for these platforms yet.
*/
#ifdef DEBUG
printf("ERROR: GetDiskSpaceAvailable: Not implemented for plaforms without statfs.\n");
#endif
return NS_ERROR_NOT_IMPLEMENTED;
#endif /* HAVE_SYS_STATFS_H or HAVE_SYS_STATVFS_H */
}
NS_IMETHODIMP
nsLocalFile::GetParent(nsIFile **aParent)
{
NS_ENSURE_ARG_POINTER(aParent);
*aParent = nsnull;
CHECK_mPath();
nsCString parentPath(NS_STATIC_CAST(const char*, mPath));
// check to see whether or not we need to cut off any trailing
// slashes
PRInt32 offset = parentPath.RFindChar('/');
PRInt32 length = parentPath.Length();
// eat of trailing slash marks
while ((length > 1) && offset && (length == (offset + 1))) {
parentPath.Truncate(offset);
offset = parentPath.RFindChar('/');
length = parentPath.Length();
}
if (offset == -1)
return NS_ERROR_FILE_UNRECOGNIZED_PATH;
// for the case where we are at '/'
if (offset == 0)
offset++;
parentPath.Truncate(offset);
nsCOMPtr<nsILocalFile> localFile;
nsresult rv = NS_NewLocalFile(parentPath.GetBuffer(), PR_TRUE, getter_AddRefs(localFile));
if(NS_SUCCEEDED(rv) && localFile)
{
return localFile->QueryInterface(NS_GET_IID(nsIFile), (void**)aParent);
}
return rv;
}
/*
* The results of Exists, isWritable and isReadable are not cached.
*/
NS_IMETHODIMP
nsLocalFile::Exists(PRBool *_retval)
{
NS_ENSURE_ARG_POINTER(_retval);
PRBool accessOK;
*_retval = accessOK = (access(mPath, F_OK) == 0);
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::IsWritable(PRBool *_retval)
{
NS_ENSURE_ARG_POINTER(_retval);
PRBool accessOK;
*_retval = accessOK = (access(mPath, W_OK) == 0);
if (accessOK || errno == EACCES)
return NS_OK;
return NSRESULT_FOR_ERRNO();
}
NS_IMETHODIMP
nsLocalFile::IsReadable(PRBool *_retval)
{
NS_ENSURE_ARG_POINTER(_retval);
PRBool accessOK;
*_retval = accessOK = (access(mPath, R_OK) == 0);
if (accessOK || errno == EACCES)
return NS_OK;
return NSRESULT_FOR_ERRNO();
}
NS_IMETHODIMP
nsLocalFile::IsExecutable(PRBool *_retval)
{
NS_ENSURE_ARG_POINTER(_retval);
PRBool accessOK;
*_retval = accessOK = (access(mPath, X_OK) == 0);
if (accessOK || errno == EACCES)
return NS_OK;
return NSRESULT_FOR_ERRNO();
}
NS_IMETHODIMP
nsLocalFile::IsDirectory(PRBool *_retval)
{
NS_ENSURE_ARG_POINTER(_retval);
VALIDATE_STAT_CACHE();
*_retval = S_ISDIR(mCachedStat.st_mode);
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::IsFile(PRBool *_retval)
{
NS_ENSURE_ARG_POINTER(_retval);
VALIDATE_STAT_CACHE();
*_retval = S_ISREG(mCachedStat.st_mode);
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::IsHidden(PRBool *_retval)
{
NS_ENSURE_ARG_POINTER(_retval);
nsresult rv;
const char *leafName;
if (NS_FAILED(rv = GetLeafNameRaw(&leafName)))
return rv;
*_retval = (leafName[0] == '.');
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::IsSymlink(PRBool *_retval)
{
NS_ENSURE_ARG_POINTER(_retval);
VALIDATE_STAT_CACHE();
*_retval = S_ISLNK(mCachedStat.st_mode);
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::IsSpecial(PRBool *_retval)
{
NS_ENSURE_ARG_POINTER(_retval);
VALIDATE_STAT_CACHE();
*_retval = !(S_ISLNK(mCachedStat.st_mode) || S_ISREG(mCachedStat.st_mode) ||
S_ISDIR(mCachedStat.st_mode));
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::Equals(nsIFile *inFile, PRBool *_retval)
{
NS_ENSURE_ARG(inFile);
NS_ENSURE_ARG_POINTER(_retval);
*_retval = PR_FALSE;
nsresult rv;
nsXPIDLCString myPath, inPath;
if (NS_FAILED(rv = GetPath(getter_Copies(myPath))))
return rv;
if (NS_FAILED(rv = inFile->GetPath(getter_Copies(inPath))))
return rv;
*_retval = !FILE_STRCMP(inPath, myPath);
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::Contains(nsIFile *inFile, PRBool recur, PRBool *_retval)
{
NS_ENSURE_ARG(inFile);
NS_ENSURE_ARG_POINTER(_retval);
nsXPIDLCString inPath;
nsresult rv;
*_retval = PR_FALSE;
if (NS_FAILED(rv = inFile->GetPath(getter_Copies(inPath))))
return rv;
ssize_t len = strlen(mPath);
if ( FILE_STRNCMP( mPath, inPath, len) == 0)
{
// now make sure that the |inFile|'s path has a trailing
// separator.
if (inPath[len] == '/')
{
*_retval = PR_TRUE;
}
}
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::GetTarget(char **_retval)
{
NS_ENSURE_ARG_POINTER(_retval);
VALIDATE_STAT_CACHE();
if (!S_ISLNK(mCachedStat.st_mode))
return NS_ERROR_FILE_INVALID_PATH;
PRInt64 targetSize64;
if (NS_FAILED(GetFileSizeOfLink(&targetSize64)))
return NS_ERROR_FAILURE;
PRInt32 hi, lo;
mLL_L2II(targetSize64, hi, lo);
char *target = (char *)nsMemory::Alloc(lo);
if (!target)
return NS_ERROR_OUT_OF_MEMORY;
int result = readlink(mPath, target, (size_t)lo);
if (!result) {
*_retval = target;
return NS_OK;
}
nsMemory::Free(target);
return NSRESULT_FOR_ERRNO();
}
NS_IMETHODIMP
nsLocalFile::Spawn(const char **args, PRUint32 count)
{
CHECK_mPath();
// status from our create process
PRStatus rv = PR_FAILURE;
// this is the argv that will hold the args that
char ** my_argv = NULL;
// make sure that when we allocate we have 1 greater than the
// count since we need to null terminate the list for the argv to
// pass into PR_CreateProcessDetached
my_argv = (char **)malloc(sizeof(char *) * (count + 2) );
if (!my_argv) {
return NS_ERROR_OUT_OF_MEMORY;
}
// copy the args
PRUint32 i;
for (i=0; i < count; i++) {
my_argv[i+1] = (char *)args[i];
}
// we need to set argv[0] to the program name.
my_argv[0] = (char *)(const char *)mPath;
// null terminate the array
my_argv[count+1] = NULL;
rv = PR_CreateProcessDetached(mPath, my_argv, NULL, NULL);
// free up our argv
free(my_argv);
if (PR_SUCCESS == rv)
return NS_OK;
else
return NS_ERROR_FILE_EXECUTION_FAILED;
}
/* attribute PRBool followLinks; */
NS_IMETHODIMP
nsLocalFile::GetFollowLinks(PRBool *aFollowLinks)
{
*aFollowLinks = PR_TRUE;
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::SetFollowLinks(PRBool aFollowLinks)
{
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::GetDirectoryEntries(nsISimpleEnumerator **entries)
{
nsDirEnumeratorUnix *dir = new nsDirEnumeratorUnix();
if (!dir)
return NS_ERROR_OUT_OF_MEMORY;
nsresult rv = dir->Init(this, PR_FALSE);
if (NS_FAILED(rv)) {
delete dir;
return rv;
}
/* QI needed? */
return dir->QueryInterface(NS_GET_IID(nsISimpleEnumerator),
(void **)entries);
}
NS_IMETHODIMP nsLocalFile::GetURL(char * *aURL)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP nsLocalFile::SetURL(const char * aURL)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsLocalFile::Load(PRLibrary **_retval)
{
NS_ENSURE_ARG_POINTER(_retval);
*_retval = PR_LoadLibrary(mPath);
if (!*_retval)
return NS_ERROR_FAILURE;
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::GetPersistentDescriptor(char * *aPersistentDescriptor)
{
NS_ENSURE_ARG_POINTER(aPersistentDescriptor);
return GetPath(aPersistentDescriptor);
}
NS_IMETHODIMP
nsLocalFile::SetPersistentDescriptor(const char * aPersistentDescriptor)
{
NS_ENSURE_ARG(aPersistentDescriptor);
return InitWithPath(aPersistentDescriptor);
}
nsresult
NS_NewLocalFile(const char* path, PRBool followSymlinks, nsILocalFile* *result)
{
nsLocalFile* file = new nsLocalFile();
if (file == nsnull)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(file);
if (path) {
nsresult rv = file->InitWithPath(path);
if (NS_FAILED(rv)) {
NS_RELEASE(file);
return rv;
}
}
*result = file;
return NS_OK;
}
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