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flist.c
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/*
* Generate and receive file lists.
*
* Copyright (C) 1996 Andrew Tridgell
* Copyright (C) 1996 Paul Mackerras
* Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org>
* Copyright (C) 2002-2020 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"
#include "rounding.h"
#include "inums.h"
#include "io.h"
extern int am_root;
extern int am_server;
extern int am_daemon;
extern int am_sender;
extern int am_generator;
extern int inc_recurse;
extern int always_checksum;
extern int checksum_type;
extern int module_id;
extern int ignore_errors;
extern int numeric_ids;
extern int quiet;
extern int recurse;
extern int use_qsort;
extern int xfer_dirs;
extern int filesfrom_fd;
extern int one_file_system;
extern int copy_dirlinks;
extern int preserve_uid;
extern int preserve_gid;
extern int preserve_acls;
extern int preserve_xattrs;
extern int preserve_links;
extern int preserve_hard_links;
extern int preserve_devices;
extern int preserve_specials;
extern int delete_during;
extern int missing_args;
extern int eol_nulls;
extern int atimes_ndx;
extern int relative_paths;
extern int implied_dirs;
extern int ignore_perishable;
extern int non_perishable_cnt;
extern int prune_empty_dirs;
extern int copy_links;
extern int copy_unsafe_links;
extern int protocol_version;
extern int sanitize_paths;
extern int munge_symlinks;
extern int use_safe_inc_flist;
extern int need_unsorted_flist;
extern int sender_symlink_iconv;
extern int output_needs_newline;
extern int sender_keeps_checksum;
extern int unsort_ndx;
extern uid_t our_uid;
extern struct stats stats;
extern char *filesfrom_host;
extern char *usermap, *groupmap;
extern char curr_dir[MAXPATHLEN];
extern struct chmod_mode_struct *chmod_modes;
extern filter_rule_list filter_list;
extern filter_rule_list daemon_filter_list;
#ifdef ICONV_OPTION
extern int filesfrom_convert;
extern iconv_t ic_send, ic_recv;
#endif
#define PTR_SIZE (sizeof (struct file_struct *))
int io_error;
int flist_csum_len;
dev_t filesystem_dev; /* used to implement -x */
struct file_list *cur_flist, *first_flist, *dir_flist;
int send_dir_ndx = -1, send_dir_depth = -1;
int flist_cnt = 0; /* how many (non-tmp) file list objects exist */
int file_total = 0; /* total of all active items over all file-lists */
int file_old_total = 0; /* total of active items that will soon be gone */
int flist_eof = 0; /* all the file-lists are now known */
#define NORMAL_NAME 0
#define SLASH_ENDING_NAME 1
#define DOTDIR_NAME 2
#define MISSING_NAME 3
/* Starting from protocol version 26, we always use 64-bit ino_t and dev_t
* internally, even if this platform does not allow files to have 64-bit inums.
* The only exception is if we're on a platform with no 64-bit type at all.
*
* Because we use read_longint() to get these off the wire, if you transfer
* devices or (for protocols < 30) hardlinks with dev or inum > 2**32 to a
* machine with no 64-bit types then you will get an overflow error.
*
* Note that if you transfer devices from a 64-bit-devt machine (say, Solaris)
* to a 32-bit-devt machine (say, Linux-2.2/x86) then the device numbers will
* be truncated. But it's a kind of silly thing to do anyhow. */
/* The tmp_* vars are used as a cache area by make_file() to store data
* that the sender doesn't need to remember in its file list. The data
* will survive just long enough to be used by send_file_entry(). */
static dev_t tmp_rdev;
#ifdef SUPPORT_HARD_LINKS
static int64 tmp_dev = -1, tmp_ino;
#endif
static char tmp_sum[MAX_DIGEST_LEN];
static char empty_sum[MAX_DIGEST_LEN];
static int flist_count_offset; /* for --delete --progress */
static int show_filelist_progress;
static void flist_sort_and_clean(struct file_list *flist, int strip_root);
static void output_flist(struct file_list *flist);
void init_flist(void)
{
if (DEBUG_GTE(FLIST, 4)) {
rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
(int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
}
parse_checksum_choice(); /* Sets checksum_type && xfersum_type */
flist_csum_len = csum_len_for_type(checksum_type, 1);
show_filelist_progress = INFO_GTE(FLIST, 1) && xfer_dirs && !am_server && !inc_recurse;
}
static void start_filelist_progress(char *kind)
{
if (quiet)
return;
rprintf(FCLIENT, "%s ... ", kind);
output_needs_newline = 1;
rflush(FINFO);
}
static void emit_filelist_progress(int count)
{
if (quiet)
return;
if (output_needs_newline == 2) /* avoid a newline in the middle of this filelist-progress output */
output_needs_newline = 0;
rprintf(FCLIENT, " %d files...\r", count);
output_needs_newline = 2;
}
static void maybe_emit_filelist_progress(int count)
{
if (INFO_GTE(FLIST, 2) && show_filelist_progress && (count % 100) == 0)
emit_filelist_progress(count);
}
static void finish_filelist_progress(const struct file_list *flist)
{
output_needs_newline = 0;
if (INFO_GTE(FLIST, 2)) {
/* This overwrites the progress line */
rprintf(FINFO, "%d file%sto consider\n",
flist->used, flist->used == 1 ? " " : "s ");
} else {
rprintf(FINFO, "done\n");
}
}
void show_flist_stats(void)
{
/* Nothing yet */
}
/* Stat either a symlink or its referent, depending on the settings of
* copy_links, copy_unsafe_links, etc. Returns -1 on error, 0 on success.
*
* If path is the name of a symlink, then the linkbuf buffer (which must hold
* MAXPATHLEN chars) will be set to the symlink's target string.
*
* The stat structure pointed to by stp will contain information about the
* link or the referent as appropriate, if they exist. */
static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
{
#ifdef SUPPORT_LINKS
if (link_stat(path, stp, copy_dirlinks) < 0)
return -1;
if (S_ISLNK(stp->st_mode)) {
int llen = do_readlink(path, linkbuf, MAXPATHLEN - 1);
if (llen < 0)
return -1;
linkbuf[llen] = '\0';
if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
if (INFO_GTE(SYMSAFE, 1)) {
rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
path, linkbuf);
}
return x_stat(path, stp, NULL);
}
if (munge_symlinks && am_sender && llen > SYMLINK_PREFIX_LEN
&& strncmp(linkbuf, SYMLINK_PREFIX, SYMLINK_PREFIX_LEN) == 0) {
memmove(linkbuf, linkbuf + SYMLINK_PREFIX_LEN,
llen - SYMLINK_PREFIX_LEN + 1);
}
}
return 0;
#else
return x_stat(path, stp, NULL);
#endif
}
int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
{
#ifdef SUPPORT_LINKS
if (copy_links)
return x_stat(path, stp, NULL);
if (x_lstat(path, stp, NULL) < 0)
return -1;
if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
STRUCT_STAT st;
if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
*stp = st;
}
return 0;
#else
return x_stat(path, stp, NULL);
#endif
}
static inline int path_is_daemon_excluded(char *path, int ignore_filename)
{
if (daemon_filter_list.head) {
char *slash = path;
while ((slash = strchr(slash+1, '/')) != NULL) {
int ret;
*slash = '\0';
ret = check_filter(&daemon_filter_list, FLOG, path, 1);
*slash = '/';
if (ret < 0) {
errno = ENOENT;
return 1;
}
}
if (!ignore_filename
&& check_filter(&daemon_filter_list, FLOG, path, 1) < 0) {
errno = ENOENT;
return 1;
}
}
return 0;
}
static inline int is_excluded(const char *fname, int is_dir, int filter_level)
{
return name_is_excluded(fname, is_dir ? NAME_IS_DIR : NAME_IS_FILE, filter_level);
}
static void send_directory(int f, struct file_list *flist,
char *fbuf, int len, int flags);
static const char *pathname, *orig_dir;
static int pathname_len;
/* Make sure flist can hold at least flist->used + extra entries. */
static void flist_expand(struct file_list *flist, int extra)
{
struct file_struct **new_ptr;
if (flist->used + extra <= flist->malloced)
return;
if (flist->malloced < FLIST_START)
flist->malloced = FLIST_START;
else if (flist->malloced >= FLIST_LINEAR)
flist->malloced += FLIST_LINEAR;
else
flist->malloced *= 2;
/* In case count jumped or we are starting the list
* with a known size just set it. */
if (flist->malloced < flist->used + extra)
flist->malloced = flist->used + extra;
new_ptr = realloc_array(flist->files, struct file_struct *,
flist->malloced);
if (DEBUG_GTE(FLIST, 1) && flist->malloced != FLIST_START) {
rprintf(FCLIENT, "[%s] expand file_list pointer array to %s bytes, did%s move\n",
who_am_i(),
big_num(sizeof flist->files[0] * flist->malloced),
(new_ptr == flist->files) ? " not" : "");
}
flist->files = new_ptr;
if (!flist->files)
out_of_memory("flist_expand");
}
static void flist_done_allocating(struct file_list *flist)
{
void *ptr = pool_boundary(flist->file_pool, 8*1024);
if (flist->pool_boundary == ptr)
flist->pool_boundary = NULL; /* list didn't use any pool memory */
else
flist->pool_boundary = ptr;
}
/* Call this with EITHER (1) "file, NULL, 0" to chdir() to the file's
* F_PATHNAME(), or (2) "NULL, dir, dirlen" to chdir() to the supplied dir,
* with dir == NULL taken to be the starting directory, and dirlen < 0
* indicating that strdup(dir) should be called and then the -dirlen length
* value checked to ensure that it is not daemon-excluded. */
int change_pathname(struct file_struct *file, const char *dir, int dirlen)
{
if (dirlen < 0) {
char *cpy = strdup(dir);
if (*cpy != '/')
change_dir(orig_dir, CD_SKIP_CHDIR);
if (path_is_daemon_excluded(cpy, 0))
goto chdir_error;
dir = cpy;
dirlen = -dirlen;
} else {
if (file) {
if (pathname == F_PATHNAME(file))
return 1;
dir = F_PATHNAME(file);
if (dir)
dirlen = strlen(dir);
} else if (pathname == dir)
return 1;
if (dir && *dir != '/')
change_dir(orig_dir, CD_SKIP_CHDIR);
}
pathname = dir;
pathname_len = dirlen;
if (!dir)
dir = orig_dir;
if (!change_dir(dir, CD_NORMAL)) {
chdir_error:
io_error |= IOERR_GENERAL;
rsyserr(FERROR_XFER, errno, "change_dir %s failed", full_fname(dir));
if (dir != orig_dir)
change_dir(orig_dir, CD_NORMAL);
pathname = NULL;
pathname_len = 0;
return 0;
}
return 1;
}
static void send_file_entry(int f, const char *fname, struct file_struct *file,
#ifdef SUPPORT_LINKS
const char *symlink_name, int symlink_len,
#endif
int ndx, int first_ndx)
{
static time_t modtime, atime;
static mode_t mode;
#ifdef SUPPORT_HARD_LINKS
static int64 dev;
#endif
static dev_t rdev;
static uint32 rdev_major;
static uid_t uid;
static gid_t gid;
static const char *user_name, *group_name;
static char lastname[MAXPATHLEN];
#ifdef SUPPORT_HARD_LINKS
int first_hlink_ndx = -1;
#endif
int l1, l2;
int xflags;
/* Initialize starting value of xflags and adjust counts. */
if (S_ISREG(file->mode))
xflags = 0;
else if (S_ISDIR(file->mode)) {
stats.num_dirs++;
if (protocol_version >= 30) {
if (file->flags & FLAG_CONTENT_DIR)
xflags = file->flags & FLAG_TOP_DIR;
else if (file->flags & FLAG_IMPLIED_DIR)
xflags = XMIT_TOP_DIR | XMIT_NO_CONTENT_DIR;
else
xflags = XMIT_NO_CONTENT_DIR;
} else
xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
} else {
if (S_ISLNK(file->mode))
stats.num_symlinks++;
else if (IS_DEVICE(file->mode))
stats.num_devices++;
else if (IS_SPECIAL(file->mode))
stats.num_specials++;
xflags = 0;
}
if (file->mode == mode)
xflags |= XMIT_SAME_MODE;
else
mode = file->mode;
if (preserve_devices && IS_DEVICE(mode)) {
if (protocol_version < 28) {
if (tmp_rdev == rdev)
xflags |= XMIT_SAME_RDEV_pre28;
else
rdev = tmp_rdev;
} else {
rdev = tmp_rdev;
if ((uint32)major(rdev) == rdev_major)
xflags |= XMIT_SAME_RDEV_MAJOR;
else
rdev_major = major(rdev);
if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
xflags |= XMIT_RDEV_MINOR_8_pre30;
}
} else if (preserve_specials && IS_SPECIAL(mode) && protocol_version < 31) {
/* Special files don't need an rdev number, so just make
* the historical transmission of the value efficient. */
if (protocol_version < 28)
xflags |= XMIT_SAME_RDEV_pre28;
else {
rdev = MAKEDEV(major(rdev), 0);
xflags |= XMIT_SAME_RDEV_MAJOR;
if (protocol_version < 30)
xflags |= XMIT_RDEV_MINOR_8_pre30;
}
} else if (protocol_version < 28)
rdev = MAKEDEV(0, 0);
if (!preserve_uid || ((uid_t)F_OWNER(file) == uid && *lastname))
xflags |= XMIT_SAME_UID;
else {
uid = F_OWNER(file);
if (!numeric_ids) {
user_name = add_uid(uid);
if (inc_recurse && user_name)
xflags |= XMIT_USER_NAME_FOLLOWS;
}
}
if (!preserve_gid || ((gid_t)F_GROUP(file) == gid && *lastname))
xflags |= XMIT_SAME_GID;
else {
gid = F_GROUP(file);
if (!numeric_ids) {
group_name = add_gid(gid);
if (inc_recurse && group_name)
xflags |= XMIT_GROUP_NAME_FOLLOWS;
}
}
if (file->modtime == modtime)
xflags |= XMIT_SAME_TIME;
else
modtime = file->modtime;
if (NSEC_BUMP(file) && protocol_version >= 31)
xflags |= XMIT_MOD_NSEC;
if (atimes_ndx && !S_ISDIR(mode)) {
if (F_ATIME(file) == atime)
xflags |= XMIT_SAME_ATIME;
else
atime = F_ATIME(file);
}
#ifdef SUPPORT_HARD_LINKS
if (tmp_dev != -1) {
if (protocol_version >= 30) {
struct ht_int64_node *np = idev_find(tmp_dev, tmp_ino);
first_hlink_ndx = (int32)(long)np->data - 1;
if (first_hlink_ndx < 0) {
np->data = (void*)(long)(first_ndx + ndx + 1);
xflags |= XMIT_HLINK_FIRST;
}
if (DEBUG_GTE(HLINK, 1)) {
if (first_hlink_ndx >= 0) {
rprintf(FINFO, "[%s] #%d hard-links #%d (%sabbrev)\n",
who_am_i(), first_ndx + ndx, first_hlink_ndx,
first_hlink_ndx >= first_ndx ? "" : "un");
} else if (DEBUG_GTE(HLINK, 3)) {
rprintf(FINFO, "[%s] dev:inode for #%d is %s:%s\n",
who_am_i(), first_ndx + ndx,
big_num(tmp_dev), big_num(tmp_ino));
}
}
} else {
if (tmp_dev == dev) {
if (protocol_version >= 28)
xflags |= XMIT_SAME_DEV_pre30;
} else
dev = tmp_dev;
}
xflags |= XMIT_HLINKED;
}
#endif
for (l1 = 0;
lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
l1++) {}
l2 = strlen(fname+l1);
if (l1 > 0)
xflags |= XMIT_SAME_NAME;
if (l2 > 255)
xflags |= XMIT_LONG_NAME;
/* We must make sure we don't send a zero flag byte or the
* other end will terminate the flist transfer. Note that
* the use of XMIT_TOP_DIR on a non-dir has no meaning, so
* it's harmless way to add a bit to the first flag byte. */
if (protocol_version >= 28) {
if (!xflags && !S_ISDIR(mode))
xflags |= XMIT_TOP_DIR;
if ((xflags & 0xFF00) || !xflags) {
xflags |= XMIT_EXTENDED_FLAGS;
write_shortint(f, xflags);
} else
write_byte(f, xflags);
} else {
if (!(xflags & 0xFF))
xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
write_byte(f, xflags);
}
if (xflags & XMIT_SAME_NAME)
write_byte(f, l1);
if (xflags & XMIT_LONG_NAME)
write_varint30(f, l2);
else
write_byte(f, l2);
write_buf(f, fname + l1, l2);
#ifdef SUPPORT_HARD_LINKS
if (first_hlink_ndx >= 0) {
write_varint(f, first_hlink_ndx);
if (first_hlink_ndx >= first_ndx)
goto the_end;
}
#endif
write_varlong30(f, F_LENGTH(file), 3);
if (!(xflags & XMIT_SAME_TIME)) {
if (protocol_version >= 30)
write_varlong(f, modtime, 4);
else
write_int(f, modtime);
}
if (xflags & XMIT_MOD_NSEC)
write_varint(f, F_MOD_NSEC(file));
if (!(xflags & XMIT_SAME_MODE))
write_int(f, to_wire_mode(mode));
if (atimes_ndx && !S_ISDIR(mode) && !(xflags & XMIT_SAME_ATIME))
write_varlong(f, atime, 4);
if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
if (protocol_version < 30)
write_int(f, uid);
else {
write_varint(f, uid);
if (xflags & XMIT_USER_NAME_FOLLOWS) {
int len = strlen(user_name);
write_byte(f, len);
write_buf(f, user_name, len);
}
}
}
if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
if (protocol_version < 30)
write_int(f, gid);
else {
write_varint(f, gid);
if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
int len = strlen(group_name);
write_byte(f, len);
write_buf(f, group_name, len);
}
}
}
if ((preserve_devices && IS_DEVICE(mode))
|| (preserve_specials && IS_SPECIAL(mode) && protocol_version < 31)) {
if (protocol_version < 28) {
if (!(xflags & XMIT_SAME_RDEV_pre28))
write_int(f, (int)rdev);
} else {
if (!(xflags & XMIT_SAME_RDEV_MAJOR))
write_varint30(f, major(rdev));
if (protocol_version >= 30)
write_varint(f, minor(rdev));
else if (xflags & XMIT_RDEV_MINOR_8_pre30)
write_byte(f, minor(rdev));
else
write_int(f, minor(rdev));
}
}
#ifdef SUPPORT_LINKS
if (symlink_len) {
write_varint30(f, symlink_len);
write_buf(f, symlink_name, symlink_len);
}
#endif
#ifdef SUPPORT_HARD_LINKS
if (tmp_dev != -1 && protocol_version < 30) {
/* Older protocols expect the dev number to be transmitted
* 1-incremented so that it is never zero. */
if (protocol_version < 26) {
/* 32-bit dev_t and ino_t */
write_int(f, (int32)(dev+1));
write_int(f, (int32)tmp_ino);
} else {
/* 64-bit dev_t and ino_t */
if (!(xflags & XMIT_SAME_DEV_pre30))
write_longint(f, dev+1);
write_longint(f, tmp_ino);
}
}
#endif
if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
const char *sum;
if (S_ISREG(mode))
sum = tmp_sum;
else {
/* Prior to 28, we sent a useless set of nulls. */
sum = empty_sum;
}
write_buf(f, sum, flist_csum_len);
}
#ifdef SUPPORT_HARD_LINKS
the_end:
#endif
strlcpy(lastname, fname, MAXPATHLEN);
if (S_ISREG(mode) || S_ISLNK(mode))
stats.total_size += F_LENGTH(file);
}
static struct file_struct *recv_file_entry(int f, struct file_list *flist, int xflags)
{
static int64 modtime, atime;
static mode_t mode;
#ifdef SUPPORT_HARD_LINKS
static int64 dev;
#endif
static dev_t rdev;
static uint32 rdev_major;
static uid_t uid;
static gid_t gid;
static uint16 gid_flags;
static char lastname[MAXPATHLEN], *lastdir;
static int lastdir_depth, lastdir_len = -1;
static unsigned int del_hier_name_len = 0;
static int in_del_hier = 0;
char thisname[MAXPATHLEN];
unsigned int l1 = 0, l2 = 0;
int alloc_len, basename_len, linkname_len;
int extra_len = file_extra_cnt * EXTRA_LEN;
int first_hlink_ndx = -1;
int64 file_length;
uint32 modtime_nsec;
const char *basename;
struct file_struct *file;
alloc_pool_t *pool;
char *bp;
if (xflags & XMIT_SAME_NAME)
l1 = read_byte(f);
if (xflags & XMIT_LONG_NAME)
l2 = read_varint30(f);
else
l2 = read_byte(f);
if (l2 >= MAXPATHLEN - l1) {
rprintf(FERROR,
"overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
xflags, l1, l2, lastname, who_am_i());
overflow_exit("recv_file_entry");
}
strlcpy(thisname, lastname, l1 + 1);
read_sbuf(f, &thisname[l1], l2);
thisname[l1 + l2] = 0;
/* Abuse basename_len for a moment... */
basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
#ifdef ICONV_OPTION
if (ic_recv != (iconv_t)-1) {
xbuf outbuf, inbuf;
INIT_CONST_XBUF(outbuf, thisname);
INIT_XBUF(inbuf, lastname, basename_len, (size_t)-1);
if (iconvbufs(ic_recv, &inbuf, &outbuf, ICB_INIT) < 0) {
io_error |= IOERR_GENERAL;
rprintf(FERROR_UTF8,
"[%s] cannot convert filename: %s (%s)\n",
who_am_i(), lastname, strerror(errno));
outbuf.len = 0;
}
thisname[outbuf.len] = '\0';
}
#endif
if (*thisname
&& (clean_fname(thisname, CFN_REFUSE_DOT_DOT_DIRS) < 0 || (!relative_paths && *thisname == '/'))) {
rprintf(FERROR, "ABORTING due to unsafe pathname from sender: %s\n", thisname);
exit_cleanup(RERR_PROTOCOL);
}
if (sanitize_paths)
sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
if ((basename = strrchr(thisname, '/')) != NULL) {
int len = basename++ - thisname;
if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
lastdir = new_array(char, len + 1);
memcpy(lastdir, thisname, len);
lastdir[len] = '\0';
lastdir_len = len;
lastdir_depth = count_dir_elements(lastdir);
}
} else
basename = thisname;
basename_len = strlen(basename) + 1; /* count the '\0' */
#ifdef SUPPORT_HARD_LINKS
if (protocol_version >= 30
&& BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
first_hlink_ndx = read_varint(f);
if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->ndx_start + flist->used) {
rprintf(FERROR,
"hard-link reference out of range: %d (%d)\n",
first_hlink_ndx, flist->ndx_start + flist->used);
exit_cleanup(RERR_PROTOCOL);
}
if (DEBUG_GTE(HLINK, 1)) {
rprintf(FINFO, "[%s] #%d hard-links #%d (%sabbrev)\n",
who_am_i(), flist->used+flist->ndx_start, first_hlink_ndx,
first_hlink_ndx >= flist->ndx_start ? "" : "un");
}
if (first_hlink_ndx >= flist->ndx_start) {
struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
file_length = F_LENGTH(first);
modtime = first->modtime;
modtime_nsec = F_MOD_NSEC_or_0(first);
mode = first->mode;
if (preserve_uid)
uid = F_OWNER(first);
if (preserve_gid)
gid = F_GROUP(first);
if (preserve_devices && IS_DEVICE(mode)) {
uint32 *devp = F_RDEV_P(first);
rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
}
if (preserve_links && S_ISLNK(mode))
linkname_len = strlen(F_SYMLINK(first)) + 1;
else
linkname_len = 0;
goto create_object;
}
}
#endif
file_length = read_varlong30(f, 3);
if (!(xflags & XMIT_SAME_TIME)) {
if (protocol_version >= 30) {
modtime = read_varlong(f, 4);
#if SIZEOF_TIME_T < SIZEOF_INT64
if (!am_generator && (int64)(time_t)modtime != modtime) {
rprintf(FERROR_XFER,
"Time value of %s truncated on receiver.\n",
lastname);
}
#endif
} else
modtime = read_int(f);
}
if (xflags & XMIT_MOD_NSEC)
modtime_nsec = read_varint(f);
else
modtime_nsec = 0;
if (!(xflags & XMIT_SAME_MODE))
mode = from_wire_mode(read_int(f));
if (atimes_ndx && !S_ISDIR(mode) && !(xflags & XMIT_SAME_ATIME)) {
atime = read_varlong(f, 4);
#if SIZEOF_TIME_T < SIZEOF_INT64
if (!am_generator && (int64)(time_t)atime != atime) {
rprintf(FERROR_XFER,
"Access time value of %s truncated on receiver.\n",
lastname);
}
#endif
}
if (chmod_modes && !S_ISLNK(mode) && mode)
mode = tweak_mode(mode, chmod_modes);
if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
if (protocol_version < 30)
uid = (uid_t)read_int(f);
else {
uid = (uid_t)read_varint(f);
if (xflags & XMIT_USER_NAME_FOLLOWS)
uid = recv_user_name(f, uid);
else if (inc_recurse && am_root && (!numeric_ids || usermap))
uid = match_uid(uid);
}
}
if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
if (protocol_version < 30)
gid = (gid_t)read_int(f);
else {
gid = (gid_t)read_varint(f);
gid_flags = 0;
if (xflags & XMIT_GROUP_NAME_FOLLOWS)
gid = recv_group_name(f, gid, &gid_flags);
else if (inc_recurse && (!am_root || !numeric_ids || groupmap))
gid = match_gid(gid, &gid_flags);
}
}
if ((preserve_devices && IS_DEVICE(mode))
|| (preserve_specials && IS_SPECIAL(mode) && protocol_version < 31)) {
if (protocol_version < 28) {
if (!(xflags & XMIT_SAME_RDEV_pre28))
rdev = (dev_t)read_int(f);
} else {
uint32 rdev_minor;
if (!(xflags & XMIT_SAME_RDEV_MAJOR))
rdev_major = read_varint30(f);
if (protocol_version >= 30)
rdev_minor = read_varint(f);
else if (xflags & XMIT_RDEV_MINOR_8_pre30)
rdev_minor = read_byte(f);
else
rdev_minor = read_int(f);
rdev = MAKEDEV(rdev_major, rdev_minor);
}
if (IS_DEVICE(mode))
extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
file_length = 0;
} else if (protocol_version < 28)
rdev = MAKEDEV(0, 0);
#ifdef SUPPORT_LINKS
if (preserve_links && S_ISLNK(mode)) {
linkname_len = read_varint30(f) + 1; /* count the '\0' */
if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
rprintf(FERROR, "overflow: linkname_len=%d\n",
linkname_len - 1);
overflow_exit("recv_file_entry");
}
#ifdef ICONV_OPTION
/* We don't know how much extra room we need to convert
* the as-yet-unread symlink data, so let's hope that a
* double-size buffer is plenty. */
if (sender_symlink_iconv)
linkname_len *= 2;
#endif
if (munge_symlinks)
linkname_len += SYMLINK_PREFIX_LEN;
}
else
#endif
linkname_len = 0;
#ifdef SUPPORT_HARD_LINKS
create_object:
if (preserve_hard_links) {
if (protocol_version < 28 && S_ISREG(mode))
xflags |= XMIT_HLINKED;
if (xflags & XMIT_HLINKED)
extra_len += (inc_recurse+1) * EXTRA_LEN;
}
#endif
#ifdef SUPPORT_ACLS
/* Directories need an extra int32 for the default ACL. */
if (preserve_acls && S_ISDIR(mode))
extra_len += EXTRA_LEN;
#endif
if (always_checksum && S_ISREG(mode))
extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
#if SIZEOF_INT64 >= 8
if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
extra_len += EXTRA_LEN;
#endif
#ifdef CAN_SET_NSEC
if (modtime_nsec)
extra_len += EXTRA_LEN;
#endif
if (file_length < 0) {
rprintf(FERROR, "Offset underflow: file-length is negative\n");
exit_cleanup(RERR_UNSUPPORTED);
}
if (inc_recurse && S_ISDIR(mode)) {
if (one_file_system) {
/* Room to save the dir's device for -x */
extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
}
pool = dir_flist->file_pool;
} else
pool = flist->file_pool;
#if EXTRA_ROUNDING > 0
if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
#endif
alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
+ linkname_len;
bp = pool_alloc(pool, alloc_len, "recv_file_entry");
memset(bp, 0, extra_len + FILE_STRUCT_LEN);
bp += extra_len;
file = (struct file_struct *)bp;
bp += FILE_STRUCT_LEN;
memcpy(bp, basename, basename_len);
#ifdef SUPPORT_HARD_LINKS
if (xflags & XMIT_HLINKED
#ifndef CAN_HARDLINK_SYMLINK
&& !S_ISLNK(mode)
#endif
#ifndef CAN_HARDLINK_SPECIAL
&& !IS_SPECIAL(mode) && !IS_DEVICE(mode)
#endif
)
file->flags |= FLAG_HLINKED;
#endif
file->modtime = (time_t)modtime;
#ifdef CAN_SET_NSEC
if (modtime_nsec) {
file->flags |= FLAG_MOD_NSEC;
F_MOD_NSEC(file) = modtime_nsec;
}
#endif
file->len32 = (uint32)file_length;
#if SIZEOF_INT64 >= 8
if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
#if SIZEOF_CAPITAL_OFF_T < 8
rprintf(FERROR, "Offset overflow: attempted 64-bit file-length\n");
exit_cleanup(RERR_UNSUPPORTED);
#else
file->flags |= FLAG_LENGTH64;
F_HIGH_LEN(file) = (uint32)(file_length >> 32);
#endif
}
#endif
file->mode = mode;
if (preserve_uid)
F_OWNER(file) = uid;
if (preserve_gid) {
F_GROUP(file) = gid;
file->flags |= gid_flags;
}
if (atimes_ndx)
F_ATIME(file) = atime;
if (unsort_ndx)
F_NDX(file) = flist->used + flist->ndx_start;
if (basename != thisname) {
file->dirname = lastdir;
F_DEPTH(file) = lastdir_depth + 1;
} else
F_DEPTH(file) = 1;
if (S_ISDIR(mode)) {
if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */