#include <sys/types.h>
#include <sys/uio.h>
#include <sys/extattr.h>
#include <sys/param.h>
#include <sys/mount.h>
#include <ufs/ufs/extattr.h>
#include <err.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <util.h>
#include <machine/bswap.h>
#include <machine/endian.h>
static int needswap;
static uint32_t
rw32(uint32_t v)
{
if (needswap)
return (bswap32(v));
return (v);
}
__dead static void
usage(void)
{
fprintf(stderr,
"usage:\n"
" %s start path\n"
" %s stop path\n"
" %s initattr [-f] [-p path] attrsize attrfile\n"
" %s showattr attrfile\n"
" %s enable path attrnamespace attrname attrfile\n"
" %s disable path attrnamespace attrname\n",
getprogname(), getprogname(), getprogname(),
getprogname(), getprogname(), getprogname());
exit(1);
}
static uint64_t
num_inodes_by_path(const char *path)
{
struct statvfs buf;
if (statvfs(path, &buf) == -1) {
warn("statvfs(%s)", path);
return (uint64_t)-1;
}
return (buf.f_files);
}
static const char zero_buf[8192];
static int
initattr(int argc, char *argv[])
{
struct ufs_extattr_fileheader uef;
char *fs_path = NULL;
int ch, i, error, flags;
ssize_t wlen;
size_t easize;
flags = O_CREAT | O_WRONLY | O_TRUNC | O_EXCL;
optind = 0;
while ((ch = getopt(argc, argv, "fp:")) != -1) {
switch (ch) {
case 'f':
flags &= ~O_EXCL;
break;
case 'p':
fs_path = optarg;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (argc != 2)
usage();
error = 0;
if ((i = open(argv[1], flags, 0600)) == -1) {
warn("open(%s)", argv[1]);
return (-1);
}
uef.uef_magic = rw32(UFS_EXTATTR_MAGIC);
uef.uef_version = rw32(UFS_EXTATTR_VERSION);
uef.uef_size = rw32(atoi(argv[0]));
if (write(i, &uef, sizeof(uef)) != sizeof(uef)) {
warn("unable to write attribute file header");
error = -1;
} else if (fs_path != NULL) {
easize = (sizeof(uef) + uef.uef_size) *
num_inodes_by_path(fs_path);
while (easize > 0) {
size_t x = (easize > sizeof(zero_buf)) ?
sizeof(zero_buf) : easize;
wlen = write(i, zero_buf, x);
if ((size_t)wlen != x) {
warn("unable to write attribute file");
error = -1;
break;
}
easize -= wlen;
}
}
close(i);
if (error == -1) {
unlink(argv[1]);
return (-1);
}
return (0);
}
static int
showattr(int argc, char *argv[])
{
struct ufs_extattr_fileheader uef;
int i, fd;
const char *bo;
if (argc != 1)
usage();
fd = open(argv[0], O_RDONLY);
if (fd == -1) {
warn("open(%s)", argv[0]);
return (-1);
}
i = read(fd, &uef, sizeof(uef));
if (i != sizeof(uef)) {
warn("unable to read attribute file header");
(void)close(fd);
return (-1);
}
if (rw32(uef.uef_magic) != UFS_EXTATTR_MAGIC) {
needswap = 1;
if (rw32(uef.uef_magic) != UFS_EXTATTR_MAGIC) {
fprintf(stderr, "%s: bad magic\n", argv[0]);
(void)close(fd);
return (-1);
}
}
#if BYTE_ORDER == LITTLE_ENDIAN
bo = needswap ? "big-endian" : "little-endian";
#else
bo = needswap ? "little-endian" : "big-endian";
#endif
printf("%s: version %u, size %u, byte-order: %s\n",
argv[0], rw32(uef.uef_version), rw32(uef.uef_size), bo);
close(fd);
return (0);
}
int
main(int argc, char *argv[])
{
int error = 0, attrnamespace;
if (argc < 2)
usage();
if (!strcmp(argv[1], "start")) {
if (argc != 3)
usage();
error = extattrctl(argv[2], UFS_EXTATTR_CMD_START, NULL, 0,
NULL);
if (error)
err(1, "start");
} else if (!strcmp(argv[1], "stop")) {
if (argc != 3)
usage();
error = extattrctl(argv[2], UFS_EXTATTR_CMD_STOP, NULL, 0,
NULL);
if (error)
err(1, "stop");
} else if (!strcmp(argv[1], "enable")) {
if (argc != 6)
usage();
error = extattr_string_to_namespace(argv[3], &attrnamespace);
if (error)
errx(1, "bad namespace: %s", argv[3]);
error = extattrctl(argv[2], UFS_EXTATTR_CMD_ENABLE, argv[5],
attrnamespace, argv[4]);
if (error)
err(1, "enable");
} else if (!strcmp(argv[1], "disable")) {
if (argc != 5)
usage();
error = extattr_string_to_namespace(argv[3], &attrnamespace);
if (error)
errx(1, "bad namespace: %s", argv[3]);
error = extattrctl(argv[2], UFS_EXTATTR_CMD_DISABLE, NULL,
attrnamespace, argv[4]);
if (error)
err(1, "disable");
} else if (!strcmp(argv[1], "initattr")) {
argc -= 2;
argv += 2;
error = initattr(argc, argv);
if (error)
return (1);
} else if (!strcmp(argv[1], "showattr")) {
argc -= 2;
argv += 2;
error = showattr(argc, argv);
if (error)
return (1);
} else
usage();
return (0);
}
