int
ustar_rd(ARCHD *arcn, char *buf)
{
HD_USTAR *hd = (HD_USTAR *)buf;
char *dest;
int cnt = 0;
dev_t devmajor;
dev_t devminor;
unsigned long long val;
/*
* we only get proper sized buffers
*/
if (ustar_id(buf, BLKMULT) < 0)
return(-1);
#ifndef SMALL
reset:
#endif
memset(arcn, 0, sizeof(*arcn));
arcn->org_name = arcn->name;
arcn->sb.st_nlink = 1;
#ifndef SMALL
/* Process Extended headers. */
if (hd->typeflag == XHDRTYPE || hd->typeflag == GHDRTYPE) {
if (rd_xheader(arcn, hd->typeflag == GHDRTYPE,
(off_t)asc_ul(hd->size, sizeof(hd->size), OCT)) < 0)
return (-1);
/* Update and check the ustar header. */
if (rd_wrbuf(buf, BLKMULT) != BLKMULT)
return (-1);
if (ustar_id(buf, BLKMULT) < 0)
return(-1);
/* if the next block is another extension, reset the values */
if (hd->typeflag == XHDRTYPE || hd->typeflag == GHDRTYPE)
goto reset;
}
#endif
if (!arcn->nlen) {
/*
* See if the filename is split into two parts. if, so join
* the parts. We copy the prefix first and add a / between
* the prefix and name.
*/
dest = arcn->name;
if (*(hd->prefix) != '\0') {
cnt = fieldcpy(dest, sizeof(arcn->name) - 1,
hd->prefix, sizeof(hd->prefix));
dest += cnt;
*dest++ = '/';
cnt++;
} else
cnt = 0;
if (hd->typeflag != LONGLINKTYPE &&
hd->typeflag != LONGNAMETYPE) {
arcn->nlen = cnt + expandname(dest,
sizeof(arcn->name) - cnt, &gnu_name_string,
hd->name, sizeof(hd->name));
}
}
if (!arcn->ln_nlen &&
hd->typeflag != LONGLINKTYPE && hd->typeflag != LONGNAMETYPE) {
arcn->ln_nlen = expandname(arcn->ln_name, sizeof(arcn->ln_name),
&gnu_link_string, hd->linkname, sizeof(hd->linkname));
}
/*
* follow the spec to the letter. we should only have mode bits, strip
* off all other crud we may be passed.
*/
arcn->sb.st_mode = (mode_t)(asc_ul(hd->mode, sizeof(hd->mode), OCT) &
0xfff);
arcn->sb.st_size = (off_t)asc_ull(hd->size, sizeof(hd->size), OCT);
val = asc_ull(hd->mtime, sizeof(hd->mtime), OCT);
if ((time_t)val < 0 || (time_t)val != val)
arcn->sb.st_mtime = INT_MAX; /* XXX 2038 */
else
arcn->sb.st_mtime = val;
arcn->sb.st_ctime = arcn->sb.st_atime = arcn->sb.st_mtime;
/*
* If we can find the ascii names for gname and uname in the password
* and group files we will use the uid's and gid they bind. Otherwise
* we use the uid and gid values stored in the header. (This is what
* the posix spec wants).
*/
hd->gname[sizeof(hd->gname) - 1] = '\0';
if (Nflag || gid_name(hd->gname, &(arcn->sb.st_gid)) < 0)
arcn->sb.st_gid = (gid_t)asc_ul(hd->gid, sizeof(hd->gid), OCT);
hd->uname[sizeof(hd->uname) - 1] = '\0';
if (Nflag || uid_name(hd->uname, &(arcn->sb.st_uid)) < 0)
arcn->sb.st_uid = (uid_t)asc_ul(hd->uid, sizeof(hd->uid), OCT);
/*
* set the defaults, these may be changed depending on the file type
*/
arcn->pad = 0;
arcn->skip = 0;
arcn->sb.st_rdev = (dev_t)0;
/*
* set the mode and PAX type according to the typeflag in the header
*/
switch (hd->typeflag) {
case FIFOTYPE:
arcn->type = PAX_FIF;
arcn->sb.st_mode |= S_IFIFO;
break;
case DIRTYPE:
arcn->type = PAX_DIR;
arcn->sb.st_mode |= S_IFDIR;
arcn->sb.st_nlink = 2;
/*
* Some programs that create ustar archives append a '/'
* to the pathname for directories. This clearly violates
* ustar specs, but we will silently strip it off anyway.
*/
if (arcn->name[arcn->nlen - 1] == '/')
arcn->name[--arcn->nlen] = '\0';
break;
case BLKTYPE:
case CHRTYPE:
/*
* this type requires the rdev field to be set.
*/
if (hd->typeflag == BLKTYPE) {
arcn->type = PAX_BLK;
arcn->sb.st_mode |= S_IFBLK;
} else {
arcn->type = PAX_CHR;
arcn->sb.st_mode |= S_IFCHR;
}
devmajor = (dev_t)asc_ul(hd->devmajor,sizeof(hd->devmajor),OCT);
devminor = (dev_t)asc_ul(hd->devminor,sizeof(hd->devminor),OCT);
arcn->sb.st_rdev = TODEV(devmajor, devminor);
break;
case SYMTYPE:
case LNKTYPE:
if (hd->typeflag == SYMTYPE) {
arcn->type = PAX_SLK;
arcn->sb.st_mode |= S_IFLNK;
} else {
arcn->type = PAX_HLK;
/*
* so printing looks better
*/
arcn->sb.st_mode |= S_IFREG;
arcn->sb.st_nlink = 2;
}
break;
case LONGLINKTYPE:
case LONGNAMETYPE:
/*
* GNU long link/file; we tag these here and let the
* pax internals deal with it -- too ugly otherwise.
*/
arcn->type =
hd->typeflag == LONGLINKTYPE ? PAX_GLL : PAX_GLF;
arcn->pad = TAR_PAD(arcn->sb.st_size);
arcn->skip = arcn->sb.st_size;
break;
case CONTTYPE:
case AREGTYPE:
case REGTYPE:
default:
/*
* these types have file data that follows. Set the skip and
* pad fields.
*/
arcn->type = PAX_REG;
arcn->pad = TAR_PAD(arcn->sb.st_size);
arcn->skip = arcn->sb.st_size;
arcn->sb.st_mode |= S_IFREG;
break;
}
return(0);
}
int
ustar_wr(ARCHD *arcn)
{
HD_USTAR *hd;
char *pt;
char hdblk[sizeof(HD_USTAR)];
/*
* check for those file system types ustar cannot store
*/
if (arcn->type == PAX_SCK) {
paxwarn(1, "Ustar cannot archive a socket %s", arcn->org_name);
return(1);
}
/*
* user asked that dirs not be written to the archive
*/
if (arcn->type == PAX_DIR && tar_nodir)
return (1);
/*
* check the length of the linkname
*/
if (PAX_IS_LINK(arcn->type) && (arcn->ln_nlen > sizeof(hd->linkname))) {
paxwarn(1, "Link name too long for ustar %s", arcn->ln_name);
return(1);
}
/*
* split the path name into prefix and name fields (if needed). if
* pt != arcn->name, the name has to be split
*/
if ((pt = name_split(arcn->name, arcn->nlen)) == NULL) {
paxwarn(1, "File name too long for ustar %s", arcn->name);
return(1);
}
/*
* zero out the header so we don't have to worry about zero fill below
*/
memset(hdblk, 0, sizeof(hdblk));
hd = (HD_USTAR *)hdblk;
arcn->pad = 0;
/*
* split the name, or zero out the prefix
*/
if (pt != arcn->name) {
/*
* name was split, pt points at the / where the split is to
* occur, we remove the / and copy the first part to the prefix
*/
*pt = '\0';
fieldcpy(hd->prefix, sizeof(hd->prefix), arcn->name,
sizeof(arcn->name));
*pt++ = '/';
}
/*
* copy the name part. this may be the whole path or the part after
* the prefix
*/
fieldcpy(hd->name, sizeof(hd->name), pt,
sizeof(arcn->name) - (pt - arcn->name));
/*
* set the fields in the header that are type dependent
*/
switch (arcn->type) {
case PAX_DIR:
hd->typeflag = DIRTYPE;
if (ul_oct(0, hd->size, sizeof(hd->size), 3))
goto out;
break;
case PAX_CHR:
case PAX_BLK:
if (arcn->type == PAX_CHR)
hd->typeflag = CHRTYPE;
else
hd->typeflag = BLKTYPE;
if (ul_oct(MAJOR(arcn->sb.st_rdev), hd->devmajor,
sizeof(hd->devmajor), 3) ||
ul_oct(MINOR(arcn->sb.st_rdev), hd->devminor,
sizeof(hd->devminor), 3) ||
ul_oct(0, hd->size, sizeof(hd->size), 3))
goto out;
break;
case PAX_FIF:
hd->typeflag = FIFOTYPE;
if (ul_oct(0, hd->size, sizeof(hd->size), 3))
goto out;
break;
case PAX_SLK:
case PAX_HLK:
case PAX_HRG:
if (arcn->type == PAX_SLK)
hd->typeflag = SYMTYPE;
else
hd->typeflag = LNKTYPE;
fieldcpy(hd->linkname, sizeof(hd->linkname), arcn->ln_name,
sizeof(arcn->ln_name));
if (ul_oct(0, hd->size, sizeof(hd->size), 3))
goto out;
break;
case PAX_REG:
case PAX_CTG:
default:
/*
* file data with this type, set the padding
*/
if (arcn->type == PAX_CTG)
hd->typeflag = CONTTYPE;
else
hd->typeflag = REGTYPE;
arcn->pad = TAR_PAD(arcn->sb.st_size);
if (ull_oct(arcn->sb.st_size, hd->size, sizeof(hd->size), 3)) {
paxwarn(1, "File is too long for ustar %s",
arcn->org_name);
return(1);
}
break;
}
strncpy(hd->magic, TMAGIC, TMAGLEN);
strncpy(hd->version, TVERSION, TVERSLEN);
/*
* set the remaining fields. Some versions want all 16 bits of mode
* we better humor them (they really do not meet spec though)....
*/
if (ul_oct(arcn->sb.st_uid, hd->uid, sizeof(hd->uid), 3)) {
if (uid_nobody == 0) {
if (uid_name("nobody", &uid_nobody) == -1)
goto out;
}
if (uid_warn != arcn->sb.st_uid) {
uid_warn = arcn->sb.st_uid;
paxwarn(1,
"Ustar header field is too small for uid %lu, "
"using nobody", (u_long)arcn->sb.st_uid);
}
if (ul_oct(uid_nobody, hd->uid, sizeof(hd->uid), 3))
goto out;
}
if (ul_oct(arcn->sb.st_gid, hd->gid, sizeof(hd->gid), 3)) {
if (gid_nobody == 0) {
if (gid_name("nobody", &gid_nobody) == -1)
goto out;
}
if (gid_warn != arcn->sb.st_gid) {
gid_warn = arcn->sb.st_gid;
paxwarn(1,
"Ustar header field is too small for gid %lu, "
"using nobody", (u_long)arcn->sb.st_gid);
}
if (ul_oct(gid_nobody, hd->gid, sizeof(hd->gid), 3))
goto out;
}
if (ull_oct(arcn->sb.st_mtime < 0 ? 0 : arcn->sb.st_mtime, hd->mtime,
sizeof(hd->mtime), 3) ||
ul_oct(arcn->sb.st_mode, hd->mode, sizeof(hd->mode), 3))
goto out;
if (!Nflag) {
strncpy(hd->uname, name_uid(arcn->sb.st_uid, 0), sizeof(hd->uname));
strncpy(hd->gname, name_gid(arcn->sb.st_gid, 0), sizeof(hd->gname));
} else {
strncpy(hd->uname, "", sizeof(hd->uname));
strncpy(hd->gname, "", sizeof(hd->gname));
}
/*
* calculate and store the checksum write the header to the archive
* return 0 tells the caller to now write the file data, 1 says no data
* needs to be written
*/
if (ul_oct(tar_chksm(hdblk, sizeof(HD_USTAR)), hd->chksum,
sizeof(hd->chksum), 3))
goto out;
if (wr_rdbuf(hdblk, sizeof(HD_USTAR)) < 0)
return(-1);
if (wr_skip(BLKMULT - sizeof(HD_USTAR)) < 0)
return(-1);
if (PAX_IS_REG(arcn->type))
return(0);
return(1);
out:
/*
* header field is out of range
*/
paxwarn(1, "Ustar header field is too small for %s", arcn->org_name);
return(1);
}
int
main(int argc, char **argv)
{
char *name, *p;
mode_t mode;
dev_t dev;
pack_t *pack;
u_long numbers[MAXARGS];
int n, ch, fifo, hasformat;
int r_flag = 0; /* force: delete existing entry */
#ifdef KERN_DRIVERS
int l_flag = 0; /* list device names and numbers */
int major;
#endif
void *modes = 0;
uid_t uid = -1;
gid_t gid = -1;
int rval;
dev = 0;
fifo = hasformat = 0;
pack = pack_native;
#ifdef KERN_DRIVERS
while ((ch = getopt(argc, argv, "lrRF:g:m:u:")) != -1) {
#else
while ((ch = getopt(argc, argv, "rRF:g:m:u:")) != -1) {
#endif
switch (ch) {
#ifdef KERN_DRIVERS
case 'l':
l_flag = 1;
break;
#endif
case 'r':
r_flag = 1;
break;
case 'R':
r_flag = 2;
break;
case 'F':
pack = pack_find(optarg);
if (pack == NULL)
errx(1, "invalid format: %s", optarg);
hasformat++;
break;
case 'g':
if (optarg[0] == '#') {
gid = strtol(optarg + 1, &p, 10);
if (*p == 0)
break;
}
if (gid_name(optarg, &gid) == 0)
break;
gid = strtol(optarg, &p, 10);
if (*p == 0)
break;
errx(1, "%s: invalid group name", optarg);
case 'm':
modes = setmode(optarg);
if (modes == NULL)
err(1, "Cannot set file mode `%s'", optarg);
break;
case 'u':
if (optarg[0] == '#') {
uid = strtol(optarg + 1, &p, 10);
if (*p == 0)
break;
}
if (uid_from_user(optarg, &uid) == 0)
break;
uid = strtol(optarg, &p, 10);
if (*p == 0)
break;
errx(1, "%s: invalid user name", optarg);
default:
case '?':
usage();
}
}
argc -= optind;
argv += optind;
#ifdef KERN_DRIVERS
if (l_flag) {
print_device_info(argv);
return 0;
}
#endif
if (argc < 2 || argc > 10)
usage();
name = *argv;
argc--;
argv++;
umask(mode = umask(0));
mode = (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH) & ~mode;
if (argv[0][1] != '\0')
goto badtype;
switch (*argv[0]) {
case 'c':
mode |= S_IFCHR;
break;
case 'b':
mode |= S_IFBLK;
break;
case 'p':
if (hasformat)
errx(1, "format is meaningless for fifos");
mode |= S_IFIFO;
fifo = 1;
break;
default:
badtype:
errx(1, "node type must be 'b', 'c' or 'p'.");
}
argc--;
argv++;
if (fifo) {
if (argc != 0)
usage();
} else {
if (argc < 1 || argc > MAXARGS)
usage();
}
for (n = 0; n < argc; n++) {
errno = 0;
numbers[n] = strtoul(argv[n], &p, 0);
if (*p == 0 && errno == 0)
continue;
#ifdef KERN_DRIVERS
if (argc == 2 && n == 0) {
major = major_from_name(argv[0], mode);
if (major != -1) {
numbers[0] = major;
continue;
}
if (!isdigit(*(unsigned char *)argv[0]))
errx(1, "unknown driver: %s", argv[0]);
}
#endif
errx(1, "invalid number: %s", argv[n]);
}
switch (argc) {
case 0:
dev = 0;
break;
case 1:
dev = numbers[0];
break;
default:
dev = callPack(pack, argc, numbers);
break;
}
if (modes != NULL)
mode = getmode(modes, mode);
umask(0);
rval = fifo ? mkfifo(name, mode) : mknod(name, mode, dev);
if (rval < 0 && errno == EEXIST && r_flag) {
struct stat sb;
if (lstat(name, &sb) != 0 || (!fifo && sb.st_rdev != dev))
sb.st_mode = 0;
if ((sb.st_mode & S_IFMT) == (mode & S_IFMT)) {
if (r_flag == 1)
/* Ignore permissions and user/group */
return 0;
if (sb.st_mode != mode)
rval = chmod(name, mode);
else
rval = 0;
} else {
unlink(name);
rval = fifo ? mkfifo(name, mode)
: mknod(name, mode, dev);
}
}
if (rval < 0)
err(1, "%s", name);
if ((uid != (uid_t)-1 || gid != (uid_t)-1) && chown(name, uid, gid) == -1)
/* XXX Should we unlink the files here? */
warn("%s: uid/gid not changed", name);
return 0;
}
static void
usage(void)
{
const char *progname = getprogname();
(void)fprintf(stderr,
"usage: %s [-rR] [-F format] [-m mode] [-u user] [-g group]\n",
progname);
(void)fprintf(stderr,
#ifdef KERN_DRIVERS
" [ name [b | c] [major | driver] minor\n"
#else
" [ name [b | c] major minor\n"
#endif
" | name [b | c] major unit subunit\n"
" | name [b | c] number\n"
" | name p ]\n");
#ifdef KERN_DRIVERS
(void)fprintf(stderr, " %s -l [driver] ...\n", progname);
#endif
exit(1);
}
static int
gid_name(const char *name, gid_t *gid)
{
struct group *g;
g = getgrnam(name);
if (!g)
return -1;
*gid = g->gr_gid;
return 0;
}
static dev_t
callPack(pack_t *f, int n, u_long *numbers)
{
dev_t d;
const char *error = NULL;
d = (*f)(n, numbers, &error);
if (error != NULL)
errx(1, "%s", error);
return d;
}
