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pjs/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>
* Brendan Eich <brendan@mozilla.org>
*/
/*
* 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 "nsXPIDLString.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
/* 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 == nsnull) {
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)
{
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 = nsnull;
nsCOMPtr<nsIFile> inst = new nsLocalFile();
if (!inst)
return NS_ERROR_OUT_OF_MEMORY;
return inst->QueryInterface(aIID, aInstancePtr);
}
NS_IMETHODIMP
nsLocalFile::Clone(nsIFile **file)
{
CHECK_mPath();
NS_ENSURE_ARG(file);
nsCOMPtr<nsILocalFile> localFile = new nsLocalFile();
if (!localFile)
return NS_ERROR_OUT_OF_MEMORY;
nsresult 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);
ssize_t len = strlen(filePath);
char *name = (char *) nsMemory::Clone(filePath, len+1);
while (name[len-1] == '/' && len > 1)
name[--len] = '\0';
mPath = name;
nsMemory::Free(name);
InvalidateCache();
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::CreateAllAncestors(PRUint32 permissions)
{
CHECK_mPath();
// <jband> I promise to play nice
char *buffer = NS_CONST_CAST(char *, (const char *)mPath),
*slashp = buffer;
#ifdef DEBUG_NSIFILE
fprintf(stderr, "nsIFile: before: %s\n", buffer);
#endif
while ((slashp = strchr(slashp + 1, '/'))) {
/*
* Sequences of '/' are equivalent to a single '/'.
*/
if (slashp[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 (slashp[1] == '\0')
break;
/* Temporarily NUL-terminate here */
*slashp = '\0';
#ifdef DEBUG_NSIFILE
fprintf(stderr, "nsIFile: mkdir(\"%s\")\n", buffer);
#endif
int result = mkdir(buffer, permissions);
/* Put the / back before we (maybe) return */
*slashp = '/';
/*
* 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_ERROR_FAILURE;
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::OpenANSIFileDesc(const char *mode, FILE **_retval)
{
CHECK_mPath();
*_retval = fopen(mPath, mode);
if (! *_retval)
return NS_ERROR_FAILURE;
return NS_OK;
}
static int exclusive_create(const char *path, mode_t mode)
{
int fd = open(path, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, mode);
if (fd >= 0)
close(fd);
return fd;
}
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;
int (*exclusiveCreateFunc)(const char *, mode_t) =
(type == NORMAL_FILE_TYPE) ? exclusive_create : exclusive_mkdir;
result = exclusiveCreateFunc((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 = exclusiveCreateFunc((const char *)mPath, permissions);
}
return NSRESULT_FOR_RETURN(result);
}
NS_IMETHODIMP
nsLocalFile::Append(const char *fragment)
{
CHECK_mPath();
NS_ENSURE_ARG(fragment);
// only one component of path can be appended
if (strchr(fragment, '/'))
return NS_ERROR_FILE_UNRECOGNIZED_PATH;
return AppendRelativePath(fragment);
}
NS_IMETHODIMP
nsLocalFile::AppendRelativePath(const char *fragment)
{
CHECK_mPath();
NS_ENSURE_ARG(fragment);
// No leading '/' and no ".." component is allowed in the fragment.
if (*fragment == '/')
return NS_ERROR_FILE_UNRECOGNIZED_PATH;
const char *dots = strstr(fragment, "..");
if (dots &&
(dots == fragment || dots[-1] == '/') &&
(dots[2] == '\0' || dots[2] == '/')) {
// XXXbe what's the difference between UNRECOGNIZED and INVALID?
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);
// strip trailing slashes that came from fragment
ssize_t len = strlen(newPath);
while (newPath[len-1] == '/' && len > 1)
newPath[--len] = '\0';
// nsXPIDLCString will copy.
mPath = newPath;
InvalidateCache();
nsMemory::Free(newPath);
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::Normalize()
{
CHECK_mPath();
char resolved_path[PATH_MAX];
char *resolved_path_ptr = nsnull;
#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)
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, '/');
NS_ASSERTION(leafName, "non-canonical 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)
{
CHECK_mPath();
NS_ENSURE_ARG(aLeafName);
nsresult rv;
char *leafName;
if (NS_FAILED(rv = GetLeafNameRaw((const char **)&leafName)))
return rv;
char *newPath = (char *)nsMemory::Alloc((leafName - (const char *)mPath) +
strlen(aLeafName) +
1);
if (!newPath)
return NS_ERROR_OUT_OF_MEMORY;
*leafName = '\0';
strcpy(newPath, mPath);
strcat(newPath, aLeafName);
// nsXPIDLCString will copy.
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;
}
nsresult
nsLocalFile::GetTargetPathName(nsIFile *newParent, const char *newName,
char **_retval)
{
nsresult rv;
nsCOMPtr<nsIFile> oldParent;
if (!newParent) {
if (NS_FAILED(rv = GetParent(getter_AddRefs(oldParent))))
return rv;
newParent = oldParent.get();
} else {
// check to see if our target directory exists
PRBool targetExists;
newParent->Exists(&targetExists);
if (!targetExists) {
// XXX create the new directory with some permissions
rv = newParent->Create(DIRECTORY_TYPE, 0755);
if (NS_FAILED(rv))
return rv;
} else {
// make sure that the target is actually a directory
PRBool targetIsDirectory;
newParent->IsDirectory(&targetIsDirectory);
if (!targetIsDirectory)
return NS_ERROR_FILE_DESTINATION_NOT_DIR;
}
}
if (!newName && NS_FAILED(rv = GetLeafNameRaw(&newName)))
return rv;
nsXPIDLCString dirName;
if (NS_FAILED(rv = newParent->GetPath(getter_Copies(dirName))))
return rv;
char *newPathName = (char *)nsMemory::Alloc(strlen(dirName) +
strlen(newName) +
2);
if (!newPathName)
return NS_ERROR_OUT_OF_MEMORY;
strcpy(newPathName, dirName);
strcat(newPathName, "/");
strcat(newPathName, newName);
*_retval = newPathName;
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::CopyTo(nsIFile *newParent, const char *newName)
{
nsresult rv;
// 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) {
// XXXbe what's the bugzilla.mozilla.org bug number for this?
rv = NS_ERROR_NOT_IMPLEMENTED;
} else {
nsXPIDLCString newPathName;
rv = GetTargetPathName(newParent, newName, getter_Copies(newPathName));
if (NS_FAILED(rv))
return rv;
#ifdef DEBUG_blizzard
printf("nsLocalFile::CopyTo() %s -> %s\n", (const char *)mPath, (const char *)newPathName);
#endif
// actually create the file.
nsLocalFile *newFile = new nsLocalFile();
if (!newFile) {
return NS_ERROR_OUT_OF_MEMORY;
}
NS_ADDREF(newFile);
rv = newFile->InitWithPath(newPathName);
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;
rv = newFile->OpenNSPRFileDesc(openFlags, modeFlags, &newFD);
if (NS_FAILED(rv)) {
NS_RELEASE(newFile);
return rv;
}
// open the old file, too
openFlags = PR_RDONLY;
PRFileDesc *oldFD;
rv = OpenNSPRFileDesc(openFlags, modeFlags, &oldFD);
if (NS_FAILED(rv)) {
// make sure to clean up properly
PR_Close(newFD);
NS_RELEASE(newFile);
return rv;
}
#ifdef DEBUG_blizzard
PRInt32 totalRead = 0;
PRInt32 totalWritten = 0;
#endif
char buf[BUFSIZ];
PRInt32 bytesRead;
while ((bytesRead = PR_Read(oldFD, buf, BUFSIZ)) > 0) {
#ifdef DEBUG_blizzard
totalRead += bytesRead;
#endif
// PR_Write promises never to do a short write
PRInt32 bytesWritten = PR_Write(newFD, buf, bytesRead);
if (bytesWritten < 0) {
bytesRead = -1;
break;
}
NS_ASSERTION(bytesWritten == bytesRead, "short PR_Write?");
#ifdef DEBUG_blizzard
totalWritten += bytesWritten;
#endif
}
#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);
// check for read (or write) error after cleaning up
if (bytesRead < 0)
return NSRESULT_FOR_ERRNO();
}
return rv;
}
NS_IMETHODIMP
nsLocalFile::CopyToFollowingLinks(nsIFile *newParent, const char *newName)
{
return CopyTo(newParent, newName);
}
NS_IMETHODIMP
nsLocalFile::MoveTo(nsIFile *newParent, const char *newName)
{
nsresult rv;
// check to make sure that this has been initialized properly
CHECK_mPath();
// check to make sure that we have a new parent
nsXPIDLCString newPathName;
rv = GetTargetPathName(newParent, newName, getter_Copies(newPathName));
if (NS_FAILED(rv))
return rv;
// try for atomic rename, falling back to copy/delete
if (rename((const char *)mPath, (const char *)newPathName) < 0) {
if (errno == EXDEV) {
rv = CopyTo(newParent, newName);
if (NS_SUCCEEDED(rv))
rv = Delete(PR_TRUE);
} else {
rv = NSRESULT_FOR_ERRNO();
}
}
return rv;
}
NS_IMETHODIMP
nsLocalFile::Delete(PRBool recursive)
{
CHECK_mPath();
VALIDATE_STAT_CACHE();
PRBool isDir = S_ISDIR(mCachedStat.st_mode);
/* XXX ?
* if (!isDir && recursive)
* return NS_ERROR_INVALID_ARG;
*/
InvalidateCache();
if (isDir) {
if (recursive) {
nsCOMPtr<nsDirEnumeratorUnix> dir = new nsDirEnumeratorUnix();
if (!dir)
return NS_ERROR_OUT_OF_MEMORY;
nsresult rv = dir->Init(this, PR_FALSE);
if (NS_FAILED(rv))
return rv;
PRBool more;
while (dir->HasMoreElements(&more), more) {
nsCOMPtr<nsISupports> item;
rv = dir->GetNext(getter_AddRefs(item));
if (NS_FAILED(rv))
return NS_ERROR_FAILURE;
nsCOMPtr<nsIFile> file = do_QueryInterface(item, &rv);
if (NS_FAILED(rv))
return NS_ERROR_FAILURE;
if (NS_FAILED(rv = file->Delete(recursive)))
return rv;
}
}
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 *aLastModTime)
{
CHECK_mPath();
NS_ENSURE_ARG(aLastModTime);
PRFileInfo64 info;
if (PR_GetFileInfo64(mPath, &info) != PR_SUCCESS)
return NSRESULT_FOR_ERRNO();
// PRTime is a 64 bit value
// microseconds -> milliseconds
PRInt64 usecPerMsec;
LL_I2L(usecPerMsec, PR_USEC_PER_MSEC);
LL_DIV(*aLastModTime, info.modifyTime, usecPerMsec);
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::SetLastModificationDate(PRInt64 aLastModTime)
{
CHECK_mPath();
int result;
if (aLastModTime) {
VALIDATE_STAT_CACHE();
struct utimbuf ut;
ut.actime = mCachedStat.st_atime;
// convert milliseconds to seconds since the unix epoch
double dTime;
LL_L2D(dTime, aLastModTime);
ut.modtime = (time_t) (dTime / PR_MSEC_PER_SEC);
result = utime(mPath, &ut);
} else {
result = utime(mPath, nsnull);
}
InvalidateCache();
return NSRESULT_FOR_RETURN(result);
}
NS_IMETHODIMP
nsLocalFile::GetLastModificationDateOfLink(PRInt64 *aLastModTimeOfLink)
{
CHECK_mPath();
NS_ENSURE_ARG(aLastModTimeOfLink);
struct stat sbuf;
if (lstat(mPath, &sbuf) == -1)
return NSRESULT_FOR_ERRNO();
LL_I2L(*aLastModTimeOfLink, (PRInt32)sbuf.st_mtime);
// lstat returns st_mtime in seconds
PRInt64 msecPerSec;
LL_I2L(msecPerSec, PR_MSEC_PER_SEC);
LL_MUL(*aLastModTimeOfLink, *aLastModTimeOfLink, msecPerSec);
return NS_OK;
}
/*
* utime(2) may or may not dereference symlinks, joy.
*/
NS_IMETHODIMP
nsLocalFile::SetLastModificationDateOfLink(PRInt64 aLastModTimeOfLink)
{
return SetLastModificationDate(aLastModTimeOfLink);
}
/*
* 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)
{
CHECK_mPath();
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)
{
CHECK_mPath();
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)) {
*aFileSize = LL_ZERO;
} else {
LL_UI2L(*aFileSize, (PRUint32)mCachedStat.st_size);
}
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::SetFileSize(PRInt64 aFileSize)
{
CHECK_mPath();
PRInt32 size;
LL_L2I(size, aFileSize);
/* XXX truncate64? */
InvalidateCache();
if (truncate((const char *)mPath, (off_t)size) == -1)
return NSRESULT_FOR_ERRNO();
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::GetFileSizeOfLink(PRInt64 *aFileSize)
{
CHECK_mPath();
NS_ENSURE_ARG(aFileSize);
struct stat sbuf;
if (lstat(mPath, &sbuf) == -1)
return NSRESULT_FOR_ERRNO();
/* XXX autoconf for and use lstat64 if available */
LL_UI2L(*aFileSize, (PRUint32)sbuf.st_size);
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::GetDiskSpaceAvailable(PRInt64 *aDiskSpaceAvailable)
{
NS_ENSURE_ARG_POINTER(aDiskSpaceAvailable);
// 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(*aDiskSpaceAvailable, fs_buf.f_bsize * (fs_buf.f_bavail - 1));
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)
{
CHECK_mPath();
NS_ENSURE_ARG_POINTER(aParent);
*aParent = nsnull;
// <brendan, after jband> I promise to play nice
char *buffer = NS_CONST_CAST(char *, (const char *)mPath),
*slashp = buffer;
// find the last significant slash in buffer
slashp = strrchr(buffer, '/');
NS_ASSERTION(slashp, "non-canonical mPath?");
if (!slashp)
return NS_ERROR_FILE_INVALID_PATH;
// for the case where we are at '/'
if (slashp == buffer)
slashp++;
// temporarily terminate buffer at the last significant slash
*slashp = '\0';
nsCOMPtr<nsILocalFile> localFile;
nsresult rv = NS_NewLocalFile(buffer, PR_TRUE, getter_AddRefs(localFile));
*slashp = '/';
if (NS_SUCCEEDED(rv) && localFile)
rv = 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)
{
CHECK_mPath();
NS_ENSURE_ARG_POINTER(_retval);
*_retval = (access(mPath, F_OK) == 0);
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::IsWritable(PRBool *_retval)
{
CHECK_mPath();
NS_ENSURE_ARG_POINTER(_retval);
*_retval = (access(mPath, W_OK) == 0);
if (*_retval || errno == EACCES)
return NS_OK;
return NSRESULT_FOR_ERRNO();
}
NS_IMETHODIMP
nsLocalFile::IsReadable(PRBool *_retval)
{
CHECK_mPath();
NS_ENSURE_ARG_POINTER(_retval);
*_retval = (access(mPath, R_OK) == 0);
if (*_retval || errno == EACCES)
return NS_OK;
return NSRESULT_FOR_ERRNO();
}
NS_IMETHODIMP
nsLocalFile::IsExecutable(PRBool *_retval)
{
CHECK_mPath();
NS_ENSURE_ARG_POINTER(_retval);
*_retval = (access(mPath, X_OK) == 0);
if (*_retval || 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)
{
CHECK_mPath();
NS_ENSURE_ARG(inFile);
NS_ENSURE_ARG_POINTER(_retval);
nsXPIDLCString inPath;
nsresult rv;
if (NS_FAILED(rv = inFile->GetPath(getter_Copies(inPath))))
return rv;
*_retval = PR_FALSE;
ssize_t len = strlen(mPath);
if (FILE_STRNCMP(mPath, inPath, len) == 0) {
// Now make sure that the |inFile|'s path has a separator at len,
// which implies that it has more components after len.
if (inPath[len] == '/')
*_retval = PR_TRUE;
}
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::GetTarget(char **_retval)
{
CHECK_mPath();
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 size;
LL_L2I(size, targetSize64);
char *target = (char *)nsMemory::Alloc(size + 1);
if (!target)
return NS_ERROR_OUT_OF_MEMORY;
if (readlink(mPath, target, (size_t)size) < 0) {
nsMemory::Free(target);
return NSRESULT_FOR_ERRNO();
}
target[size] = '\0';
*_retval = target;
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::Spawn(const char **args, PRUint32 count)
{
CHECK_mPath();
// 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
char **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] = nsnull;
PRStatus rv = PR_CreateProcessDetached(mPath, my_argv, nsnull, nsnull);
// free up our argv
free(my_argv);
if (rv != PR_SUCCESS)
return NS_ERROR_FILE_EXECUTION_FAILED;
return NS_OK;
}
/* 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)
{
nsCOMPtr<nsDirEnumeratorUnix> dir = new nsDirEnumeratorUnix();
if (!dir)
return NS_ERROR_OUT_OF_MEMORY;
nsresult rv = dir->Init(this, PR_FALSE);
if (NS_FAILED(rv))
return rv;
/* QI needed? If not, need to ADDREF. */
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)
{
CHECK_mPath();
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)
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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