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|
#include "Python.h"
#include <sys/types.h>
#ifdef __FreeBSD__
#include <sys/extattr.h>
#elif defined(__SUN__) || defined(__sun__) || defined(__sun)
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <dirent.h>
#include <alloca.h>
#else
#include <sys/xattr.h>
#endif
#ifdef __FreeBSD__
/* FreeBSD compatibility API */
#define XATTR_XATTR_NOFOLLOW 0x0001
#define XATTR_XATTR_CREATE 0x0002
#define XATTR_XATTR_REPLACE 0x0004
#define XATTR_XATTR_NOSECURITY 0x0008
#define XATTR_CREATE 0x1
#define XATTR_REPLACE 0x2
/* Converts a freebsd format attribute list into a NULL terminated list.
* The first byte is the length of the following attribute.
*/
static void convert_bsd_list(char *namebuf, size_t size)
{
size_t offset = 0;
while(offset < size) {
int length = (int) (unsigned char)namebuf[offset];
memmove(namebuf+offset, namebuf+offset+1, length);
namebuf[offset+length] = '\0';
offset += length+1;
}
}
static ssize_t xattr_getxattr(const char *path, const char *name,
void *value, ssize_t size, u_int32_t position,
int options)
{
if (position != 0 ||
!(options == 0 || options == XATTR_XATTR_NOFOLLOW)) {
return -1;
}
if (options & XATTR_XATTR_NOFOLLOW) {
return extattr_get_link(path, EXTATTR_NAMESPACE_USER,
name, value, size);
}
else {
return extattr_get_file(path, EXTATTR_NAMESPACE_USER,
name, value, size);
}
}
static ssize_t xattr_setxattr(const char *path, const char *name,
void *value, ssize_t size, u_int32_t position,
int options)
{
int rv = 0;
int nofollow;
if (position != 0) {
return -1;
}
nofollow = options & XATTR_XATTR_NOFOLLOW;
options &= ~XATTR_XATTR_NOFOLLOW;
if (options == XATTR_XATTR_CREATE ||
options == XATTR_XATTR_REPLACE) {
/* meh. FreeBSD doesn't really have this in its
* API... Oh well.
*/
}
else if (options != 0) {
return -1;
}
if (nofollow) {
rv = extattr_set_link(path, EXTATTR_NAMESPACE_USER,
name, value, size);
}
else {
rv = extattr_set_file(path, EXTATTR_NAMESPACE_USER,
name, value, size);
}
/* freebsd returns the written length on success, not zero. */
if (rv >= 0) {
return 0;
}
else {
return rv;
}
}
static ssize_t xattr_removexattr(const char *path, const char *name,
int options)
{
if (!(options == 0 ||
options == XATTR_XATTR_NOFOLLOW)) {
return -1;
}
if (options & XATTR_XATTR_NOFOLLOW) {
return extattr_delete_link(path, EXTATTR_NAMESPACE_USER, name);
}
else {
return extattr_delete_file(path, EXTATTR_NAMESPACE_USER, name);
}
}
static ssize_t xattr_listxattr(const char *path, char *namebuf,
size_t size, int options)
{
ssize_t rv = 0;
if (!(options == 0 ||
options == XATTR_XATTR_NOFOLLOW)) {
return -1;
}
if (options & XATTR_XATTR_NOFOLLOW) {
rv = extattr_list_link(path, EXTATTR_NAMESPACE_USER, namebuf, size);
}
else {
rv = extattr_list_file(path, EXTATTR_NAMESPACE_USER, namebuf, size);
}
if (rv > 0 && namebuf) {
convert_bsd_list(namebuf, rv);
}
return rv;
}
static ssize_t xattr_fgetxattr(int fd, const char *name, void *value,
ssize_t size, u_int32_t position, int options)
{
if (position != 0 ||
!(options == 0 || options == XATTR_XATTR_NOFOLLOW)) {
return -1;
}
if (options & XATTR_XATTR_NOFOLLOW) {
return -1;
}
else {
return extattr_get_fd(fd, EXTATTR_NAMESPACE_USER, name, value, size);
}
}
static ssize_t xattr_fsetxattr(int fd, const char *name, void *value,
ssize_t size, u_int32_t position, int options)
{
int rv = 0;
int nofollow;
if (position != 0) {
return -1;
}
nofollow = options & XATTR_XATTR_NOFOLLOW;
options &= ~XATTR_XATTR_NOFOLLOW;
if (options == XATTR_XATTR_CREATE ||
options == XATTR_XATTR_REPLACE) {
/* freebsd noop */
}
else if (options != 0) {
return -1;
}
if (nofollow) {
return -1;
}
else {
rv = extattr_set_fd(fd, EXTATTR_NAMESPACE_USER,
name, value, size);
}
/* freebsd returns the written length on success, not zero. */
if (rv >= 0) {
return 0;
}
else {
return rv;
}
}
static ssize_t xattr_fremovexattr(int fd, const char *name, int options)
{
if (!(options == 0 ||
options == XATTR_XATTR_NOFOLLOW)) {
return -1;
}
if (options & XATTR_XATTR_NOFOLLOW) {
return -1;
}
else {
return extattr_delete_fd(fd, EXTATTR_NAMESPACE_USER, name);
}
}
static ssize_t xattr_flistxattr(int fd, char *namebuf, size_t size, int options)
{
ssize_t rv = 0;
if (!(options == 0 ||
options == XATTR_XATTR_NOFOLLOW)) {
return -1;
}
if (options & XATTR_XATTR_NOFOLLOW) {
return -1;
}
else {
rv = extattr_list_fd(fd, EXTATTR_NAMESPACE_USER, namebuf, size);
}
if (rv > 0 && namebuf) {
convert_bsd_list(namebuf, rv);
}
return rv;
}
#elif defined(__SUN__) || defined(__sun__) || defined(__sun)
/* Solaris 9 and later compatibility API */
#define XATTR_XATTR_NOFOLLOW 0x0001
#define XATTR_XATTR_CREATE 0x0002
#define XATTR_XATTR_REPLACE 0x0004
#define XATTR_XATTR_NOSECURITY 0x0008
#define XATTR_CREATE 0x1
#define XATTR_REPLACE 0x2
#ifndef u_int32_t
#define u_int32_t uint32_t
#endif
static ssize_t xattr_fgetxattr(int fd, const char *name, void *value,
ssize_t size, u_int32_t position, int options)
{
int xfd;
ssize_t bytes;
struct stat statbuf;
/* XXX should check that name does not have / characters in it */
xfd = openat(fd, name, O_RDONLY | O_XATTR);
if (xfd == -1) {
return -1;
}
if (lseek(xfd, position, SEEK_SET) == -1) {
close(xfd);
return -1;
}
if (value == NULL) {
if (fstat(xfd, &statbuf) == -1) {
close(xfd);
return -1;
}
close(xfd);
return statbuf.st_size;
}
/* XXX should keep reading until the buffer is exhausted or EOF */
bytes = read(xfd, value, size);
close(xfd);
return bytes;
}
static ssize_t xattr_getxattr(const char *path, const char *name,
void *value, ssize_t size, u_int32_t position,
int options)
{
int fd;
ssize_t bytes;
if (position != 0 ||
!(options == 0 || options == XATTR_XATTR_NOFOLLOW)) {
return -1;
}
fd = open(path,
O_RDONLY |
((options & XATTR_XATTR_NOFOLLOW) ? O_NOFOLLOW : 0));
if (fd == -1) {
return -1;
}
bytes = xattr_fgetxattr(fd, name, value, size, position, options);
close(fd);
return bytes;
}
static ssize_t xattr_fsetxattr(int fd, const char *name, void *value,
ssize_t size, u_int32_t position, int options)
{
int xfd;
ssize_t bytes = 0;
/* XXX should check that name does not have / characters in it */
xfd = openat(fd, name, O_XATTR | O_TRUNC |
((options & XATTR_XATTR_CREATE) ? O_EXCL : 0) |
((options & XATTR_XATTR_NOFOLLOW) ? O_NOFOLLOW : 0) |
((options & XATTR_XATTR_REPLACE) ? O_RDWR : O_WRONLY|O_CREAT),
0644);
if (xfd == -1) {
return -1;
}
while (size > 0) {
bytes = write(xfd, value, size);
if (bytes == -1) {
close(xfd);
return -1;
}
size -= bytes;
value += bytes;
}
close(xfd);
return 0;
}
static ssize_t xattr_setxattr(const char *path, const char *name,
void *value, ssize_t size, u_int32_t position,
int options)
{
int fd;
ssize_t bytes;
if (position != 0) {
return -1;
}
fd = open(path,
O_RDONLY | (options & XATTR_XATTR_NOFOLLOW) ? O_NOFOLLOW : 0);
if (fd == -1) {
return -1;
}
bytes = xattr_fsetxattr(fd, name, value, size, position, options);
close(fd);
return bytes;
}
static ssize_t xattr_fremovexattr(int fd, const char *name, int options)
{
int xfd, status;
/* XXX should check that name does not have / characters in it */
if (!(options == 0 || options == XATTR_XATTR_NOFOLLOW)) {
return -1;
}
if (options & XATTR_XATTR_NOFOLLOW) {
return -1;
}
xfd = openat(fd, ".", O_XATTR, 0644);
if (xfd == -1) {
return -1;
}
status = unlinkat(xfd, name, 0);
close(xfd);
return status;
}
static ssize_t xattr_removexattr(const char *path, const char *name,
int options)
{
int fd;
ssize_t status;
fd = open(path,
O_RDONLY | ((options & XATTR_XATTR_NOFOLLOW) ? O_NOFOLLOW : 0));
if (fd == -1) {
return -1;
}
status = xattr_fremovexattr(fd, name, options);
close(fd);
return status;
}
static ssize_t xattr_xflistxattr(int xfd, char *namebuf, size_t size, int options)
{
int esize;
DIR *dirp;
struct dirent *entry;
ssize_t nsize = 0;
dirp = fdopendir(xfd);
if (dirp == NULL) {
return (-1);
}
while (entry = readdir(dirp)) {
if (strcmp(entry->d_name, ".") == 0 ||
strcmp(entry->d_name, "..") == 0)
continue;
esize = strlen(entry->d_name);
if (nsize + esize + 1 <= size) {
snprintf((char *)(namebuf + nsize), esize + 1,
entry->d_name);
}
nsize += esize + 1; /* +1 for \0 */
}
closedir(dirp);
return nsize;
}
static ssize_t xattr_flistxattr(int fd, char *namebuf, size_t size, int options)
{
int xfd;
xfd = openat(fd, ".", O_RDONLY | O_XATTR);
return xattr_xflistxattr(xfd, namebuf, size, options);
}
static ssize_t xattr_listxattr(const char *path, char *namebuf,
size_t size, int options)
{
int xfd;
xfd = attropen(path, ".", O_RDONLY);
return xattr_xflistxattr(xfd, namebuf, size, options);
}
#elif !defined(XATTR_NOFOLLOW)
/* Linux compatibility API */
#define XATTR_XATTR_NOFOLLOW 0x0001
#define XATTR_XATTR_CREATE 0x0002
#define XATTR_XATTR_REPLACE 0x0004
#define XATTR_XATTR_NOSECURITY 0x0008
static ssize_t xattr_getxattr(const char *path, const char *name, void *value, ssize_t size, u_int32_t position, int options) {
if (position != 0 || !(options == 0 || options == XATTR_XATTR_NOFOLLOW)) {
return -1;
}
if (options & XATTR_XATTR_NOFOLLOW) {
return lgetxattr(path, name, value, size);
} else {
return getxattr(path, name, value, size);
}
}
static ssize_t xattr_setxattr(const char *path, const char *name, void *value, ssize_t size, u_int32_t position, int options) {
int nofollow;
if (position != 0) {
return -1;
}
nofollow = options & XATTR_XATTR_NOFOLLOW;
options &= ~XATTR_XATTR_NOFOLLOW;
if (options == XATTR_XATTR_CREATE) {
options = XATTR_CREATE;
} else if (options == XATTR_XATTR_REPLACE) {
options = XATTR_REPLACE;
} else if (options != 0) {
return -1;
}
if (nofollow) {
return lsetxattr(path, name, value, size, options);
} else {
return setxattr(path, name, value, size, options);
}
}
static ssize_t xattr_removexattr(const char *path, const char *name, int options) {
if (!(options == 0 || options == XATTR_XATTR_NOFOLLOW)) {
return -1;
}
if (options & XATTR_XATTR_NOFOLLOW) {
return lremovexattr(path, name);
} else {
return removexattr(path, name);
}
}
static ssize_t xattr_listxattr(const char *path, char *namebuf, size_t size, int options) {
if (!(options == 0 || options == XATTR_XATTR_NOFOLLOW)) {
return -1;
}
if (options & XATTR_XATTR_NOFOLLOW) {
return llistxattr(path, namebuf, size);
} else {
return listxattr(path, namebuf, size);
}
}
static ssize_t xattr_fgetxattr(int fd, const char *name, void *value, ssize_t size, u_int32_t position, int options) {
if (position != 0 || !(options == 0 || options == XATTR_XATTR_NOFOLLOW)) {
return -1;
}
if (options & XATTR_XATTR_NOFOLLOW) {
return -1;
} else {
return fgetxattr(fd, name, value, size);
}
}
static ssize_t xattr_fsetxattr(int fd, const char *name, void *value, ssize_t size, u_int32_t position, int options) {
int nofollow;
if (position != 0) {
return -1;
}
nofollow = options & XATTR_XATTR_NOFOLLOW;
options &= ~XATTR_XATTR_NOFOLLOW;
if (options == XATTR_XATTR_CREATE) {
options = XATTR_CREATE;
} else if (options == XATTR_XATTR_REPLACE) {
options = XATTR_REPLACE;
} else if (options != 0) {
return -1;
}
if (nofollow) {
return -1;
} else {
return fsetxattr(fd, name, value, size, options);
}
}
static ssize_t xattr_fremovexattr(int fd, const char *name, int options) {
if (!(options == 0 || options == XATTR_XATTR_NOFOLLOW)) {
return -1;
}
if (options & XATTR_XATTR_NOFOLLOW) {
return -1;
} else {
return fremovexattr(fd, name);
}
}
static ssize_t xattr_flistxattr(int fd, char *namebuf, size_t size, int options) {
if (!(options == 0 || options == XATTR_XATTR_NOFOLLOW)) {
return -1;
}
if (options & XATTR_XATTR_NOFOLLOW) {
return -1;
} else {
return flistxattr(fd, namebuf, size);
}
}
#else /* Mac OS X assumed */
#define xattr_getxattr getxattr
#define xattr_fgetxattr fgetxattr
#define xattr_removexattr removexattr
#define xattr_fremovexattr fremovexattr
#define xattr_setxattr setxattr
#define xattr_fsetxattr fsetxattr
#define xattr_listxattr listxattr
#define xattr_flistxattr flistxattr
/* define these for use in python (see below) */
#define XATTR_XATTR_NOFOLLOW XATTR_NOFOLLOW
#define XATTR_XATTR_CREATE XATTR_CREATE
#define XATTR_XATTR_REPLACE XATTR_REPLACE
#define XATTR_XATTR_NOSECURITY XATTR_NOSECURITY
#endif
#ifndef XATTR_MAXNAMELEN
#define XATTR_MAXNAMELEN 127
#endif
|
