diff options
Diffstat (limited to 'databases/compass/files/xattr_api.c')
| -rw-r--r-- | databases/compass/files/xattr_api.c | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/databases/compass/files/xattr_api.c b/databases/compass/files/xattr_api.c new file mode 100644 index 000000000000..101119bcf917 --- /dev/null +++ b/databases/compass/files/xattr_api.c @@ -0,0 +1,229 @@ +/* + * xattr is a Linux kernel API that has to be mapped to the FreeBSD API + * code below is adopted and simplified from the 'xattr' python module + * https://github.com/xattr/xattr/blob/master/xattr/lib_build.c + */ + +#include <sys/types.h> +#ifdef __FreeBSD__ +#include <sys/extattr.h> +#endif + +#include <string.h> +#include "xattr.h" + +#ifdef __FreeBSD__ + +/* FreeBSD compatibility API */ + +/* 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; + } +} + +ssize_t 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); + } +} + +ssize_t 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; + } +} + +ssize_t 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); + } +} + + +ssize_t 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; +} + +ssize_t 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); + } +} + +ssize_t 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; + } +} + +ssize_t 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); + } +} + + +ssize_t 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; +} + +#endif |