/*
* Routines common to more than one of the rsync processes.
*
* Copyright (C) 1996 Andrew Tridgell
* Copyright (C) 1996 Paul Mackerras
* Copyright (C) 2003-2020 Wayne Davison
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, visit the http://fsf.org website.
*/
#include "rsync.h"
#include "ifuncs.h"
#if defined HAVE_LIBCHARSET_H && defined HAVE_LOCALE_CHARSET
#include <libcharset.h>
#elif defined HAVE_LANGINFO_H && defined HAVE_NL_LANGINFO
#include <langinfo.h>
#endif
extern int dry_run;
extern int preserve_acls;
extern int preserve_xattrs;
extern int preserve_perms;
extern int preserve_fileflags;
extern int preserve_executability;
extern int preserve_times;
extern int copy_devices;
extern int am_root;
extern int am_server;
extern int am_daemon;
extern int am_sender;
extern int am_receiver;
extern int am_generator;
extern int am_dbadmin;
extern int am_starting_up;
extern int allow_8bit_chars;
extern int protocol_version;
extern int got_kill_signal;
extern int called_from_signal_handler;
extern int inc_recurse;
extern int inplace;
extern int flist_eof;
extern int file_old_total;
extern int keep_dirlinks;
extern int make_backups;
extern char *link_by_hash_dir;
extern int sanitize_paths;
extern struct file_list *cur_flist, *first_flist, *dir_flist;
extern struct chmod_mode_struct *daemon_chmod_modes;
#ifdef ICONV_OPTION
extern char *iconv_opt;
#endif
#define UPDATED_OWNER (1<<0)
#define UPDATED_GROUP (1<<1)
#define UPDATED_MTIME (1<<2)
#define UPDATED_ATIME (1<<3)
#define UPDATED_ACLS (1<<4)
#define UPDATED_MODE (1<<5)
#define UPDATED_TIMES (UPDATED_MTIME|UPDATED_ATIME)
#ifdef ICONV_CONST
iconv_t ic_chck = (iconv_t)-1;
# ifdef ICONV_OPTION
iconv_t ic_send = (iconv_t)-1, ic_recv = (iconv_t)-1;
# endif
static const char *default_charset(void)
{
# if defined HAVE_LIBCHARSET_H && defined HAVE_LOCALE_CHARSET
return locale_charset();
# elif defined HAVE_LANGINFO_H && defined HAVE_NL_LANGINFO
return nl_langinfo(CODESET);
# else
return ""; /* Works with (at the very least) gnu iconv... */
# endif
}
void setup_iconv(void)
{
const char *defset = default_charset();
# ifdef ICONV_OPTION
const char *charset;
char *cp;
# endif
if (!am_server && !allow_8bit_chars) {
/* It's OK if this fails... */
ic_chck = iconv_open(defset, defset);
if (DEBUG_GTE(ICONV, 2)) {
if (ic_chck == (iconv_t)-1) {
rprintf(FINFO,
"msg checking via isprint()"
" (iconv_open(\"%s\", \"%s\") errno: %d)\n",
defset, defset, errno);
} else {
rprintf(FINFO,
"msg checking charset: %s\n",
defset);
}
}
} else
ic_chck = (iconv_t)-1;
# ifdef ICONV_OPTION
if (!iconv_opt)
return;
if ((cp = strchr(iconv_opt, ',')) != NULL) {
if (am_server) /* A local transfer needs this. */
iconv_opt = cp + 1;
else
*cp = '\0';
}
if (!*iconv_opt || (*iconv_opt == '.' && iconv_opt[1] == '\0'))
charset = defset;
else
charset = iconv_opt;
if ((ic_send = iconv_open(UTF8_CHARSET, charset)) == (iconv_t)-1) {
rprintf(FERROR, "iconv_open(\"%s\", \"%s\") failed\n",
UTF8_CHARSET, charset);
exit_cleanup(RERR_UNSUPPORTED);
}
if ((ic_recv = iconv_open(charset, UTF8_CHARSET)) == (iconv_t)-1) {
rprintf(FERROR, "iconv_open(\"%s\", \"%s\") failed\n",
charset, UTF8_CHARSET);
exit_cleanup(RERR_UNSUPPORTED);
}
if (DEBUG_GTE(ICONV, 1)) {
rprintf(FINFO, "[%s] charset: %s\n",
who_am_i(), *charset ? charset : "[LOCALE]");
}
# endif
}
/* This function converts the chars in the "in" xbuf into characters in the
* "out" xbuf. The ".len" chars of the "in" xbuf is used starting from its
* ".pos". The ".size" of the "out" xbuf restricts how many characters can
* be stored, starting at its ".pos+.len" position. Note that the last byte
* of the "out" xbuf is not used, which reserves space for a trailing '\0'
* (though it is up to the caller to store a trailing '\0', as needed).
*
* We return a 0 on success or a -1 on error. An error also sets errno to
* E2BIG, EILSEQ, or EINVAL (see below); otherwise errno will be set to 0.
* The "in" xbuf is altered to update ".pos" and ".len". The "out" xbuf has
* data appended, and its ".len" incremented (see below for a ".size" note).
*
* If ICB_CIRCULAR_OUT is set in "flags", the chars going into the "out" xbuf
* can wrap around to the start, and the xbuf may have its ".size" reduced
* (presumably by 1 byte) if the iconv code doesn't have space to store a
* multi-byte character at the physical end of the ".buf" (though no reducing
* happens if ".pos" is <= 1, since there is no room to wrap around).
*
* If ICB_EXPAND_OUT is set in "flags", the "out" xbuf will be allocated if
* empty, and (as long as ICB_CIRCULAR_OUT is not set) expanded if too small.
* This prevents the return of E2BIG (except for a circular xbuf).
*
* If ICB_INCLUDE_BAD is set in "flags", any badly-encoded chars are included
* verbatim in the "out" xbuf, so EILSEQ will not be returned.
*
* If ICB_INCLUDE_INCOMPLETE is set in "flags", any incomplete multi-byte
* chars are included, which ensures that EINVAL is not returned.
*
* If ICB_INIT is set, the iconv() conversion state is initialized prior to
* processing the characters. */
int iconvbufs(iconv_t ic, xbuf *in, xbuf *out, int flags)
{
ICONV_CONST char *ibuf;
size_t icnt, ocnt, opos;
char *obuf;
if (!out->size && flags & ICB_EXPAND_OUT) {
size_t siz = ROUND_UP_1024(in->len * 2);
alloc_xbuf(out, siz);
} else if (out->len+1 >= out->size) {
/* There is no room to even start storing data. */
if (!(flags & ICB_EXPAND_OUT) || flags & ICB_CIRCULAR_OUT) {
errno = E2BIG;
return -1;
}
realloc_xbuf(out, out->size + ROUND_UP_1024(in->len * 2));
}
if (flags & ICB_INIT)
iconv(ic, NULL, 0, NULL, 0);
ibuf = in->buf + in->pos;
icnt = in->len;
opos = out->pos + out->len;
if (flags & ICB_CIRCULAR_OUT) {
if (opos >= out->size) {
opos -= out->size;
/* We know that out->pos is not 0 due to the "no room" check
* above, so this can't go "negative". */
ocnt = out->pos - opos - 1;
} else {
/* Allow the use of all bytes to the physical end of the buffer
* unless pos is 0, in which case we reserve our trailing '\0'. */
ocnt = out->size - opos - (out->pos ? 0 : 1);
}
} else
ocnt = out->size - opos - 1;
obuf = out->buf + opos;
while (icnt) {
while (iconv(ic, &ibuf, &icnt, &obuf, &ocnt) == (size_t)-1) {
if (errno == EINTR)
continue;
if (errno == EINVAL) {
if (!(flags & ICB_INCLUDE_INCOMPLETE))
goto finish;
if (!ocnt)
goto e2big;
} else if (errno == EILSEQ) {
if (!(flags & ICB_INCLUDE_BAD))
goto finish;
if (!ocnt)
goto e2big;
} else if (errno == E2BIG) {
size_t siz;
e2big:
opos = obuf - out->buf;
if (flags & ICB_CIRCULAR_OUT && out->pos > 1 && opos > out->pos) {
/* We are in a divided circular buffer at the physical
* end with room to wrap to the start. If iconv() refused
* to use one or more trailing bytes in the buffer, we
* set the size to ignore the unused bytes. */
if (opos < out->size)
reduce_iobuf_size(out, opos);
obuf = out->buf;
ocnt = out->pos - 1;
continue;
}
if (!(flags & ICB_EXPAND_OUT) || flags & ICB_CIRCULAR_OUT) {
errno = E2BIG;
goto finish;
}
siz = ROUND_UP_1024(in->len * 2);
realloc_xbuf(out, out->size + siz);
obuf = out->buf + opos;
ocnt += siz;
continue;
} else {
rsyserr(FERROR, errno, "unexpected error from iconv()");
exit_cleanup(RERR_UNSUPPORTED);
}
*obuf++ = *ibuf++;
ocnt--, icnt--;
if (!icnt)
break;
}
}
errno = 0;
finish:
opos = obuf - out->buf;
if (flags & ICB_CIRCULAR_OUT && opos < out->pos)
opos += out->size;
out->len = opos - out->pos;
in->len = icnt;
in->pos = ibuf - in->buf;
return errno ? -1 : 0;
}
#endif
void send_protected_args(int fd, char *args[])
{
int i;
#ifdef ICONV_OPTION
int convert = ic_send != (iconv_t)-1;
xbuf outbuf, inbuf;
if (convert)
alloc_xbuf(&outbuf, 1024);
#endif
for (i = 0; args[i]; i++) {} /* find first NULL */
args[i] = "rsync"; /* set a new arg0 */
if (DEBUG_GTE(CMD, 1))
print_child_argv("protected args:", args + i + 1);
do {
if (!args[i][0])
write_buf(fd, ".", 2);
#ifdef ICONV_OPTION
else if (convert) {
INIT_XBUF_STRLEN(inbuf, args[i]);
iconvbufs(ic_send, &inbuf, &outbuf,
ICB_EXPAND_OUT | ICB_INCLUDE_BAD | ICB_INCLUDE_INCOMPLETE | ICB_INIT);
outbuf.buf[outbuf.len] = '\0';
write_buf(fd, outbuf.buf, outbuf.len + 1);
outbuf.len = 0;
}
#endif
else
write_buf(fd, args[i], strlen(args[i]) + 1);
} while (args[++i]);
write_byte(fd, 0);
#ifdef ICONV_OPTION
if (convert)
free(outbuf.buf);
#endif
}
int read_ndx_and_attrs(int f_in, int f_out, int *iflag_ptr, uchar *type_ptr, char *buf, int *len_ptr)
{
int len, iflags = 0;
struct file_list *flist;
uchar fnamecmp_type = FNAMECMP_FNAME;
int ndx;
read_loop:
while (1) {
ndx = read_ndx(f_in);
if (ndx >= 0)
break;
if (ndx == NDX_DONE)
return ndx;
if (ndx == NDX_DEL_STATS) {
read_del_stats(f_in);
if (am_sender && am_server)
write_del_stats(f_out);
continue;
}
if (!inc_recurse || am_sender) {
int last;
if (first_flist)
last = first_flist->prev->ndx_start + first_flist->prev->used - 1;
else
last = -1;
rprintf(FERROR,
"Invalid file index: %d (%d - %d) [%s]\n",
ndx, NDX_DONE, last, who_am_i());
exit_cleanup(RERR_PROTOCOL);
}
if (ndx == NDX_FLIST_EOF) {
flist_eof = 1;
if (DEBUG_GTE(FLIST, 3))
rprintf(FINFO, "[%s] flist_eof=1\n", who_am_i());
write_int(f_out, NDX_FLIST_EOF);
continue;
}
ndx = NDX_FLIST_OFFSET - ndx;
if (ndx < 0 || ndx >= dir_flist->used) {
ndx = NDX_FLIST_OFFSET - ndx;
rprintf(FERROR,
"Invalid dir index: %d (%d - %d) [%s]\n",
ndx, NDX_FLIST_OFFSET,
NDX_FLIST_OFFSET - dir_flist->used + 1,
who_am_i());
exit_cleanup(RERR_PROTOCOL);
}
if (DEBUG_GTE(FLIST, 2)) {
rprintf(FINFO, "[%s] receiving flist for dir %d\n",
who_am_i(), ndx);
}
/* Send all the data we read for this flist to the generator. */
start_flist_forward(ndx);
flist = recv_file_list(f_in, ndx);
flist->parent_ndx = ndx;
stop_flist_forward();
}
iflags = protocol_version >= 29 ? read_shortint(f_in)
: ITEM_TRANSFER | ITEM_MISSING_DATA;
/* Support the protocol-29 keep-alive style. */
if (protocol_version < 30 && ndx == cur_flist->used && iflags == ITEM_IS_NEW) {
if (am_sender)
maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
goto read_loop;
}
flist = flist_for_ndx(ndx, "read_ndx_and_attrs");
if (flist != cur_flist) {
cur_flist = flist;
if (am_sender) {
file_old_total = cur_flist->used;
for (flist = first_flist; flist != cur_flist; flist = flist->next)
file_old_total += flist->used;
}
}
if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
fnamecmp_type = read_byte(f_in);
*type_ptr = fnamecmp_type;
if (iflags & ITEM_XNAME_FOLLOWS) {
if ((len = read_vstring(f_in, buf, MAXPATHLEN)) < 0)
exit_cleanup(RERR_PROTOCOL);
if (sanitize_paths) {
sanitize_path(buf, buf, "", 0, SP_DEFAULT);
len = strlen(buf);
}
} else {
*buf = '\0';
len = -1;
}
*len_ptr = len;
if (iflags & ITEM_TRANSFER) {
int i = ndx - cur_flist->ndx_start;
struct file_struct *file = cur_flist->files[i];
if (i < 0 || !(S_ISREG(file->mode) || (copy_devices && IS_DEVICE(file->mode)))) {
rprintf(FERROR,
"received request to transfer non-regular file: %d [%s]\n",
ndx, who_am_i());
exit_cleanup(RERR_PROTOCOL);
}
}
*iflag_ptr = iflags;
return ndx;
}
/*
free a sums struct
*/
void free_sums(struct sum_struct *s)
{
if (s->sums) free(s->sums);
free(s);
}
/* This is only called when we aren't preserving permissions. Figure out what
* the permissions should be and return them merged back into the mode. */
mode_t dest_mode(mode_t flist_mode, mode_t stat_mode, int dflt_perms,
int exists)
{
int new_mode;
/* If the file already exists, we'll return the local permissions,
* possibly tweaked by the --executability option. */
if (exists) {
new_mode = (flist_mode & ~CHMOD_BITS) | (stat_mode & CHMOD_BITS);
if (preserve_executability && S_ISREG(flist_mode)) {
/* If the source file is executable, grant execute
* rights to everyone who can read, but ONLY if the
* file isn't already executable. */
if (!(flist_mode & 0111))
new_mode &= ~0111;
else if (!(stat_mode & 0111))
new_mode |= (new_mode & 0444) >> 2;
}
} else {
/* Apply destination default permissions and turn
* off special permissions. */
new_mode = flist_mode & (~CHMOD_BITS | dflt_perms);
}
return new_mode;
}
#if defined SUPPORT_FILEFLAGS || defined SUPPORT_FORCE_CHANGE
/* Set a file's st_flags. */
static int set_fileflags(const char *fname, uint32 fileflags)
{
if (do_chflags(fname, fileflags) != 0) {
rsyserr(FERROR_XFER, errno,
"failed to set file flags on %s",
full_fname(fname));
return 0;
}
return 1;
}
/* Remove immutable flags from an object, so it can be altered/removed. */
int make_mutable(const char *fname, mode_t mode, uint32 fileflags, uint32 iflags)
{
if (S_ISLNK(mode) || !(fileflags & iflags))
return 0;
if (!set_fileflags(fname, fileflags & ~iflags))
return -1;
return 1;
}
/* Undo a prior make_mutable() call that returned a 1. */
int undo_make_mutable(const char *fname, uint32 fileflags)
{
if (!set_fileflags(fname, fileflags))
return -1;
return 1;
}
#endif
static int same_mtime(struct file_struct *file, STRUCT_STAT *st, int extra_accuracy)
{
#ifdef ST_MTIME_NSEC
uint32 f1_nsec = F_MOD_NSEC_or_0(file);
uint32 f2_nsec = (uint32)st->ST_MTIME_NSEC;
#else
uint32 f1_nsec = 0, f2_nsec = 0;
#endif
if (extra_accuracy) /* ignore modify_window when setting the time after a transfer or checksum check */
return file->modtime == st->st_mtime && f1_nsec == f2_nsec;
return same_time(file->modtime, f1_nsec, st->st_mtime , f2_nsec);
}
int set_file_attrs(const char *fname, struct file_struct *file, stat_x *sxp,
const char *fnamecmp, int flags)
{
int updated = 0;
stat_x sx2;
int change_uid, change_gid;
mode_t new_mode = file->mode;
int inherit;
if (!sxp) {
if (dry_run)
return 1;
if (link_stat(fname, &sx2.st, 0) < 0) {
rsyserr(FERROR_XFER, errno, "stat %s failed",
full_fname(fname));
return 0;
}
init_stat_x(&sx2);
sxp = &sx2;
inherit = !preserve_perms;
} else
inherit = !preserve_perms && file->flags & FLAG_DIR_CREATED;
if (inherit && S_ISDIR(new_mode) && sxp->st.st_mode & S_ISGID) {
/* We just created this directory and its setgid
* bit is on, so make sure it stays on. */
new_mode |= S_ISGID;
}
if (daemon_chmod_modes && !S_ISLNK(new_mode))
new_mode = tweak_mode(new_mode, daemon_chmod_modes);
#ifdef SUPPORT_ACLS
if (preserve_acls && !S_ISLNK(file->mode) && !ACL_READY(*sxp))
get_acl(fname, sxp);
#endif
change_uid = am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file)
&& !(omit_dir_changes && S_ISDIR(sxp->st.st_mode));
change_gid = gid_ndx && !(file->flags & FLAG_SKIP_GROUP)
&& sxp->st.st_gid != (gid_t)F_GROUP(file)
&& !(omit_dir_changes && S_ISDIR(sxp->st.st_mode));
#ifndef CAN_CHOWN_SYMLINK
if (S_ISLNK(sxp->st.st_mode)) {
;
} else
#endif
if (change_uid || change_gid) {
if (DEBUG_GTE(OWN, 1)) {
if (change_uid) {
rprintf(FINFO,
"set uid of %s from %u to %u\n",
fname, (unsigned)sxp->st.st_uid, F_OWNER(file));
}
if (change_gid) {
rprintf(FINFO,
"set gid of %s from %u to %u\n",
fname, (unsigned)sxp->st.st_gid, F_GROUP(file));
}
}
if (am_root >= 0) {
uid_t uid = change_uid ? (uid_t)F_OWNER(file) : sxp->st.st_uid;
gid_t gid = change_gid ? (gid_t)F_GROUP(file) : sxp->st.st_gid;
if (do_lchown(fname, uid, gid, sxp->st.st_mode, ST_FLAGS(sxp->st)) != 0) {
/* We shouldn't have attempted to change uid
* or gid unless have the privilege. */
rsyserr(FERROR_XFER, errno, "%s %s failed",
change_uid ? "chown" : "chgrp",
full_fname(fname));
goto cleanup;
}
if (uid == (uid_t)-1 && sxp->st.st_uid != (uid_t)-1)
rprintf(FERROR_XFER, "uid 4294967295 (-1) is impossible to set on %s\n", full_fname(fname));
if (gid == (gid_t)-1 && sxp->st.st_gid != (gid_t)-1)
rprintf(FERROR_XFER, "gid 4294967295 (-1) is impossible to set on %s\n", full_fname(fname));
/* A lchown had been done, so we need to re-stat if
* the destination had the setuid or setgid bits set
* (due to the side effect of the chown call). */
if (sxp->st.st_mode & (S_ISUID | S_ISGID)) {
link_stat(fname, &sxp->st,
keep_dirlinks && S_ISDIR(sxp->st.st_mode));
}
}
if (change_uid)
updated |= UPDATED_OWNER;
if (change_gid)
updated |= UPDATED_GROUP;
}
#ifdef SUPPORT_XATTRS
if (am_root < 0)
set_stat_xattr(fname, file, new_mode);
if (preserve_xattrs && fnamecmp) {
uint32 tmpflags = sxp->st.st_flags;
sxp->st.st_flags = F_FFLAGS(file); /* set_xattr() needs to check UF_COMPRESSED */
set_xattr(fname, file, fnamecmp, sxp);
sxp->st.st_flags = tmpflags;
if (S_ISDIR(sxp->st.st_mode))
link_stat(fname, &sx2.st, 0);
}
#endif
if (!preserve_times
|| (!(preserve_times & PRESERVE_DIR_TIMES) && S_ISDIR(sxp->st.st_mode))
|| (!(preserve_times & PRESERVE_LINK_TIMES) && S_ISLNK(sxp->st.st_mode)))
flags |= ATTRS_SKIP_MTIME | ATTRS_SKIP_ATIME;
else if (sxp != &sx2)
memcpy(&sx2.st, &sxp->st, sizeof (sx2.st));
if (!atimes_ndx || S_ISDIR(sxp->st.st_mode))
flags |= ATTRS_SKIP_ATIME;
/* Don't set the creation date on the root folder of an HFS+ volume. */
if (sxp->st.st_ino == 2 && S_ISDIR(sxp->st.st_mode))
flags |= ATTRS_SKIP_CRTIME;
if (!(flags & ATTRS_SKIP_MTIME)
#ifdef SUPPORT_HFS_COMPRESSION
&& !(sxp->st.st_flags & UF_COMPRESSED) /* setting this alters mtime, so defer to after set_fileflags */
#endif
&& !same_mtime(file, &sxp->st, flags & ATTRS_ACCURATE_TIME)) {
sx2.st.st_mtime = file->modtime;
#ifdef ST_MTIME_NSEC
sx2.st.ST_MTIME_NSEC = F_MOD_NSEC_or_0(file);
#endif
updated |= UPDATED_MTIME;
}
if (!(flags & ATTRS_SKIP_ATIME)) {
time_t file_atime = F_ATIME(file);
if (flags & ATTRS_ACCURATE_TIME || !same_time(sxp->st.st_atime, 0, file_atime, 0)) {
sx2.st.st_atime = file_atime;
#ifdef ST_ATIME_NSEC
sx2.st.ST_ATIME_NSEC = 0;
#endif
updated |= UPDATED_ATIME;
}
}
if (updated & UPDATED_TIMES) {
int ret = set_times(fname, &sx2.st);
if (ret < 0) {
rsyserr(FERROR_XFER, errno, "failed to set times on %s",
full_fname(fname));
goto cleanup;
}
if (ret > 0) { /* ret == 1 if symlink could not be set */
updated &= ~UPDATED_TIMES;
file->flags |= FLAG_TIME_FAILED;
}
}
#ifdef SUPPORT_CRTIMES
if (crtimes_ndx && !(flags & ATTRS_SKIP_CRTIME)) {
time_t file_crtime = F_CRTIME(file);
if (sxp->crtime == 0)
sxp->crtime = get_create_time(fname);
if (!same_time(sxp->crtime, 0L, file_crtime, 0L)
&& set_create_time(fname, file_crtime) == 0)
updated = 1;
}
#endif
#ifdef SUPPORT_ACLS
/* It's OK to call set_acl() now, even for a dir, as the generator
* will enable owner-writability using chmod, if necessary.
*
* If set_acl() changes permission bits in the process of setting
* an access ACL, it changes sxp->st.st_mode so we know whether we
* need to chmod(). */
if (preserve_acls && !S_ISLNK(new_mode)) {
if (set_acl(fname, file, sxp, new_mode) > 0)
updated |= UPDATED_ACLS;
}
#endif
#ifdef HAVE_CHMOD
if (!BITS_EQUAL(sxp->st.st_mode, new_mode, CHMOD_BITS)) {
int ret = am_root < 0 ? 0 : do_chmod(fname, new_mode, ST_FLAGS(sxp->st));
if (ret < 0) {
rsyserr(FERROR_XFER, errno,
"failed to set permissions on %s",
full_fname(fname));
goto cleanup;
}
if (ret == 0) /* ret == 1 if symlink could not be set */
updated |= UPDATED_MODE;
}
#endif
#ifdef SUPPORT_FILEFLAGS
if (preserve_fileflags && !S_ISLNK(sxp->st.st_mode)
&& sxp->st.st_flags != F_FFLAGS(file)) {
uint32 fileflags = F_FFLAGS(file);
if (flags & ATTRS_DELAY_IMMUTABLE)
fileflags &= ~ALL_IMMUTABLE;
if (sxp->st.st_flags != fileflags
&& !set_fileflags(fname, fileflags))
goto cleanup;
updated = 1;
#ifdef SUPPORT_HFS_COMPRESSION
int ret = set_modtime(fname, file->modtime, F_MOD_NSEC(file), new_mode, fileflags);
if (ret < 0) {
rsyserr(FERROR_XFER, errno, "failed to set times on %s",
full_fname(fname));
goto cleanup;
}
if (ret != 0)
file->flags |= FLAG_TIME_FAILED;
#endif
}
#endif
if (INFO_GTE(NAME, 2) && flags & ATTRS_REPORT) {
if (updated)
rprintf(FCLIENT, "%s\n", fname);
else
rprintf(FCLIENT, "%s is uptodate\n", fname);
}
cleanup:
if (sxp == &sx2)
free_stat_x(&sx2);
return updated;
}
/* This is only called for SIGINT, SIGHUP, and SIGTERM. */
void sig_int(int sig_num)
{
called_from_signal_handler = 1;
/* KLUGE: if the user hits Ctrl-C while ssh is prompting
* for a password, then our cleanup's sending of a SIGUSR1
* signal to all our children may kill ssh before it has a
* chance to restore the tty settings (i.e. turn echo back
* on). By sleeping for a short time, ssh gets a bigger
* chance to do the right thing. If child processes are
* not ssh waiting for a password, then this tiny delay
* shouldn't hurt anything. */
msleep(400);
/* If we're an rsync daemon listener (not a daemon server),
* we'll exit with status 0 if we received SIGTERM. */
if (am_daemon && !am_server && sig_num == SIGTERM)
exit_cleanup(0);
/* If the signal arrived on the server side (or for the receiver
* process on the client), we want to try to do a controlled shutdown
* that lets the client side (generator process) know what happened.
* To do this, we set a flag and let the normal process handle the
* shutdown. We only attempt this if multiplexed IO is in effect and
* we didn't already set the flag. */
if (!got_kill_signal && (am_server || am_receiver)) {
got_kill_signal = sig_num;
called_from_signal_handler = 0;
return;
}
exit_cleanup(RERR_SIGNAL);
}
/* Finish off a file transfer: renaming the file and setting the file's
* attributes (e.g. permissions, ownership, etc.). If the robust_rename()
* call is forced to copy the temp file and partialptr is both non-NULL and
* not an absolute path, we stage the file into the partial-dir and then
* rename it into place. This returns 1 on success or 0 on failure. */
int finish_transfer(const char *fname, const char *fnametmp,
const char *fnamecmp, const char *partialptr,
struct file_struct *file, int ok_to_set_time,
int overwriting_basis)
{
int ret;
const char *temp_copy_name = partialptr && *partialptr != '/' ? partialptr : NULL;
if (inplace) {
if (DEBUG_GTE(RECV, 1))
rprintf(FINFO, "finishing %s\n", fname);
fnametmp = fname;
goto do_set_file_attrs;
}
if (make_backups > 1 && overwriting_basis) {
int ok = make_backup(fname, False);
if (!ok)
exit_cleanup(RERR_FILEIO);
if (ok == 1 && fnamecmp == fname)
fnamecmp = get_backup_name(fname);
}
/* Change permissions before putting the file into place. */
set_file_attrs(fnametmp, file, NULL, fnamecmp,
ATTRS_DELAY_IMMUTABLE
| (ok_to_set_time ? ATTRS_ACCURATE_TIME : ATTRS_SKIP_MTIME | ATTRS_SKIP_ATIME | ATTRS_SKIP_CRTIME));
/* move tmp file over real file */
if (DEBUG_GTE(RECV, 1))
rprintf(FINFO, "renaming %s to %s\n", fnametmp, fname);
ret = robust_rename(fnametmp, fname, temp_copy_name, file->mode);
if (ret < 0) {
rsyserr(FERROR_XFER, errno, "%s %s -> \"%s\"",
ret == -2 ? "copy" : "rename",
full_fname(fnametmp), fname);
if (!partialptr || (ret == -2 && temp_copy_name)
|| robust_rename(fnametmp, partialptr, NULL, file->mode) < 0)
do_unlink(fnametmp);
return 0;
}
if (ret == 0) {
/* The file was moved into place (not copied), so it's done. */
#ifdef SUPPORT_FILEFLAGS
if (preserve_fileflags && F_FFLAGS(file) & ALL_IMMUTABLE)
set_fileflags(fname, F_FFLAGS(file));
#endif
return 1;
}
/* The file was copied, so tweak the perms of the copied file. If it
* was copied to partialptr, move it into its final destination. */
fnametmp = temp_copy_name ? temp_copy_name : fname;
do_set_file_attrs:
set_file_attrs(fnametmp, file, NULL, fnamecmp,
ok_to_set_time ? ATTRS_ACCURATE_TIME : ATTRS_SKIP_MTIME | ATTRS_SKIP_ATIME | ATTRS_SKIP_CRTIME);
if (temp_copy_name) {
if (do_rename(fnametmp, fname) < 0) {
rsyserr(FERROR_XFER, errno, "rename %s -> \"%s\"",
full_fname(fnametmp), fname);
return 0;
}
handle_partial_dir(temp_copy_name, PDIR_DELETE);
}
return 1;
}
struct file_list *flist_for_ndx(int ndx, const char *fatal_error_loc)
{
struct file_list *flist = cur_flist;
if (!flist && !(flist = first_flist))
goto not_found;
while (ndx < flist->ndx_start-1) {
if (flist == first_flist)
goto not_found;
flist = flist->prev;
}
while (ndx >= flist->ndx_start + flist->used) {
if (!(flist = flist->next))
goto not_found;
}
return flist;
not_found:
if (fatal_error_loc) {
int first, last;
if (first_flist) {
first = first_flist->ndx_start - 1;
last = first_flist->prev->ndx_start + first_flist->prev->used - 1;
} else {
first = 0;
last = -1;
}
rprintf(FERROR,
"File-list index %d not in %d - %d (%s) [%s]\n",
ndx, first, last, fatal_error_loc, who_am_i());
exit_cleanup(RERR_PROTOCOL);
}
return NULL;
}
const char *who_am_i(void)
{
if (am_dbadmin)
return "rsyncdb";
if (am_starting_up)
return am_server ? "server" : "client";
return am_sender ? "sender"
: am_generator ? "generator"
: am_receiver ? "receiver"
: "Receiver"; /* pre-forked receiver */
}
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