static int
fastcopy(char *from, char *to, struct stat *sbp)
{
#if defined(__NetBSD__)
struct timespec ts[2];
#else
struct timeval tval[2];
#endif
static blksize_t blen;
static char *bp;
int nread, from_fd, to_fd;
if ((from_fd = open(from, O_RDONLY, 0)) < 0) {
warn("%s", from);
return (1);
}
if ((to_fd =
open(to, O_CREAT | O_TRUNC | O_WRONLY, sbp->st_mode)) < 0) {
warn("%s", to);
(void)close(from_fd);
return (1);
}
if (!blen && !(bp = malloc(blen = sbp->st_blksize))) {
warn(NULL);
blen = 0;
(void)close(from_fd);
(void)close(to_fd);
return (1);
}
while ((nread = read(from_fd, bp, blen)) > 0)
if (write(to_fd, bp, nread) != nread) {
warn("%s", to);
goto err;
}
if (nread < 0) {
warn("%s", from);
err: if (unlink(to))
warn("%s: remove", to);
(void)close(from_fd);
(void)close(to_fd);
return (1);
}
if (fcpxattr(from_fd, to_fd) == -1)
warn("%s: error copying extended attributes", to);
(void)close(from_fd);
#ifdef BSD4_4
#if defined(__NetBSD__)
ts[0] = sbp->st_atimespec;
ts[1] = sbp->st_mtimespec;
#else
TIMESPEC_TO_TIMEVAL(&tval[0], &sbp->st_atimespec);
TIMESPEC_TO_TIMEVAL(&tval[1], &sbp->st_mtimespec);
#endif
#else
tval[0].tv_sec = sbp->st_atime;
tval[1].tv_sec = sbp->st_mtime;
tval[0].tv_usec = 0;
tval[1].tv_usec = 0;
#endif
#ifdef __SVR4
if (utimes(to, tval))
#else
#if defined(__NetBSD__)
if (futimens(to_fd, ts))
#else
if (futimes(to_fd, tval))
#endif
#endif
warn("%s: set times", to);
if (fchown(to_fd, sbp->st_uid, sbp->st_gid)) {
if (errno != EPERM)
warn("%s: set owner/group", to);
sbp->st_mode &= ~(S_ISUID | S_ISGID);
}
if (fchmod(to_fd, sbp->st_mode))
warn("%s: set mode", to);
if (fchflags(to_fd, sbp->st_flags) && (errno != EOPNOTSUPP))
warn("%s: set flags (was: 0%07o)", to, sbp->st_flags);
if (close(to_fd)) {
warn("%s", to);
return (1);
}
if (unlink(from)) {
warn("%s: remove", from);
return (1);
}
if (vflg)
printf("%s -> %s\n", from, to);
return (0);
}
int
copy_file(FTSENT *entp, int dne)
{
static char buf[MAXBSIZE];
struct stat to_stat, *fs;
int ch, checkch, from_fd, rcount, rval, to_fd, tolnk, wcount;
char *p;
off_t ptotal = 0;
if ((from_fd = open(entp->fts_path, O_RDONLY, 0)) == -1) {
warn("%s", entp->fts_path);
return (1);
}
to_fd = -1;
fs = entp->fts_statp;
tolnk = ((Rflag && !(Lflag || Hflag)) || Pflag);
/*
* If the file exists and we're interactive, verify with the user.
* If the file DNE, set the mode to be the from file, minus setuid
* bits, modified by the umask; arguably wrong, but it makes copying
* executables work right and it's been that way forever. (The
* other choice is 666 or'ed with the execute bits on the from file
* modified by the umask.)
*/
if (!dne) {
struct stat sb;
int sval;
if (iflag) {
(void)fprintf(stderr, "overwrite %s? ", to.p_path);
checkch = ch = getchar();
while (ch != '\n' && ch != EOF)
ch = getchar();
if (checkch != 'y' && checkch != 'Y') {
(void)close(from_fd);
return (0);
}
}
sval = tolnk ?
lstat(to.p_path, &sb) : stat(to.p_path, &sb);
if (sval == -1) {
warn("stat: %s", to.p_path);
(void)close(from_fd);
return (1);
}
if (!(tolnk && S_ISLNK(sb.st_mode)))
to_fd = open(to.p_path, O_WRONLY | O_TRUNC, 0);
} else
to_fd = open(to.p_path, O_WRONLY | O_TRUNC | O_CREAT,
fs->st_mode & ~(S_ISUID | S_ISGID));
if (to_fd == -1 && (fflag || tolnk)) {
/*
* attempt to remove existing destination file name and
* create a new file
*/
(void)unlink(to.p_path);
to_fd = open(to.p_path, O_WRONLY | O_TRUNC | O_CREAT,
fs->st_mode & ~(S_ISUID | S_ISGID));
}
if (to_fd == -1) {
warn("%s", to.p_path);
(void)close(from_fd);
return (1);
}
rval = 0;
/* if hard linking then simply close the open fds, link and return */
if (lflag) {
(void)close(from_fd);
(void)close(to_fd);
(void)unlink(to.p_path);
if (link(entp->fts_path, to.p_path)) {
warn("%s", to.p_path);
return (1);
}
return (0);
}
/*
* There's no reason to do anything other than close the file
* now if it's empty, so let's not bother.
*/
if (fs->st_size > 0) {
struct finfo fi;
fi.from = entp->fts_path;
fi.to = to.p_path;
fi.size = fs->st_size;
/*
* Mmap and write if less than 8M (the limit is so
* we don't totally trash memory on big files).
* This is really a minor hack, but it wins some CPU back.
*/
bool use_read;
use_read = true;
if (fs->st_size <= MMAP_MAX_SIZE) {
size_t fsize = (size_t)fs->st_size;
p = mmap(NULL, fsize, PROT_READ, MAP_FILE|MAP_SHARED,
from_fd, (off_t)0);
if (p != MAP_FAILED) {
size_t remainder;
use_read = false;
(void) madvise(p, (size_t)fs->st_size,
MADV_SEQUENTIAL);
/*
* Write out the data in small chunks to
* avoid locking the output file for a
* long time if the reading the data from
* the source is slow.
*/
remainder = fsize;
do {
ssize_t chunk;
chunk = (remainder > MMAP_MAX_WRITE) ?
MMAP_MAX_WRITE : remainder;
if (write(to_fd, &p[fsize - remainder],
chunk) != chunk) {
warn("%s", to.p_path);
rval = 1;
break;
}
remainder -= chunk;
ptotal += chunk;
if (pinfo)
progress(&fi, ptotal);
} while (remainder > 0);
if (munmap(p, fsize) < 0) {
warn("%s", entp->fts_path);
rval = 1;
}
}
}
if (use_read) {
while ((rcount = read(from_fd, buf, MAXBSIZE)) > 0) {
wcount = write(to_fd, buf, (size_t)rcount);
if (rcount != wcount || wcount == -1) {
warn("%s", to.p_path);
rval = 1;
break;
}
ptotal += wcount;
if (pinfo)
progress(&fi, ptotal);
}
if (rcount < 0) {
warn("%s", entp->fts_path);
rval = 1;
}
}
}
if (pflag && (fcpxattr(from_fd, to_fd) != 0))
warn("%s: error copying extended attributes", to.p_path);
(void)close(from_fd);
if (rval == 1) {
(void)close(to_fd);
return (1);
}
if (pflag && setfile(fs, to_fd))
rval = 1;
/*
* If the source was setuid or setgid, lose the bits unless the
* copy is owned by the same user and group.
*/
#define RETAINBITS \
(S_ISUID | S_ISGID | S_ISVTX | S_IRWXU | S_IRWXG | S_IRWXO)
if (!pflag && dne
&& fs->st_mode & (S_ISUID | S_ISGID) && fs->st_uid == myuid) {
if (fstat(to_fd, &to_stat)) {
warn("%s", to.p_path);
rval = 1;
} else if (fs->st_gid == to_stat.st_gid &&
fchmod(to_fd, fs->st_mode & RETAINBITS & ~myumask)) {
warn("%s", to.p_path);
rval = 1;
}
}
if (close(to_fd)) {
warn("%s", to.p_path);
rval = 1;
}
/* set the mod/access times now after close of the fd */
if (pflag && set_utimes(to.p_path, fs)) {
rval = 1;
}
return (rval);
}
