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22d49dc429f18b5cccf0f237dfd95cceb0b48367
rsync/flist.c
Wayne Davison 22d49dc429 Changed the rdev code to have both an "rdev" variable (which always 
has the full device value) and an "rdev_high" variable (which zeros
the lower byte in the last rdev value).
2004-02-01 16:28:31 +00:00

1538 lines
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/*
Copyright (C) Andrew Tridgell 1996
Copyright (C) Paul Mackerras 1996
Copyright (C) 2001, 2002 by Martin Pool <mbp@samba.org>
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/** @file flist.c
* Generate and receive file lists
*
* @todo Get rid of the string_area optimization. Efficiently
* allocating blocks is the responsibility of the system's malloc
* library, not of rsync.
*
* @sa http://lists.samba.org/pipermail/rsync/2000-June/002351.html
*
**/
#include "rsync.h"
extern struct stats stats;
extern int verbose;
extern int do_progress;
extern int am_server;
extern int always_checksum;
extern int module_id;
extern int ignore_errors;
extern int cvs_exclude;
extern int recurse;
extern char curr_dir[MAXPATHLEN];
extern char *files_from;
extern int filesfrom_fd;
extern int one_file_system;
extern int make_backups;
extern int preserve_links;
extern int preserve_hard_links;
extern int preserve_perms;
extern int preserve_devices;
extern int preserve_uid;
extern int preserve_gid;
extern int preserve_times;
extern int relative_paths;
extern int implied_dirs;
extern int copy_links;
extern int copy_unsafe_links;
extern int protocol_version;
extern int sanitize_paths;
extern int read_batch;
extern int write_batch;
extern struct exclude_struct **exclude_list;
extern struct exclude_struct **server_exclude_list;
extern struct exclude_struct **local_exclude_list;
int io_error;
static struct file_struct null_file;
static char empty_sum[MD4_SUM_LENGTH];
static void clean_flist(struct file_list *flist, int strip_root, int no_dups);
static int show_filelist_p(void)
{
return verbose && (recurse || files_from) && !am_server;
}
static void start_filelist_progress(char *kind)
{
rprintf(FINFO, "%s ... ", kind);
if ((verbose > 1) || do_progress)
rprintf(FINFO, "\n");
rflush(FINFO);
}
static void emit_filelist_progress(const struct file_list *flist)
{
rprintf(FINFO, " %d files...\r", flist->count);
}
static void maybe_emit_filelist_progress(const struct file_list *flist)
{
if (do_progress && show_filelist_p() && ((flist->count % 100) == 0))
emit_filelist_progress(flist);
}
static void finish_filelist_progress(const struct file_list *flist)
{
if (do_progress) {
/* This overwrites the progress line */
rprintf(FINFO, "%d file%sto consider\n",
flist->count, flist->count == 1 ? " " : "s ");
} else
rprintf(FINFO, "done\n");
}
void show_flist_stats(void)
{
/* Nothing yet */
}
static struct string_area *string_area_new(int size)
{
struct string_area *a;
if (size <= 0)
size = ARENA_SIZE;
a = new(struct string_area);
if (!a)
out_of_memory("string_area_new");
a->current = a->base = new_array(char, size);
if (!a->current)
out_of_memory("string_area_new buffer");
a->end = a->base + size;
a->next = NULL;
return a;
}
static void string_area_free(struct string_area *a)
{
struct string_area *next;
for (; a; a = next) {
next = a->next;
free(a->base);
}
}
static char *string_area_malloc(struct string_area **ap, int size)
{
char *p;
struct string_area *a;
/* does the request fit into the current space? */
a = *ap;
if (a->current + size >= a->end) {
/* no; get space, move new string_area to front of the list */
a = string_area_new(size > ARENA_SIZE ? size : ARENA_SIZE);
a->next = *ap;
*ap = a;
}
/* have space; do the "allocation." */
p = a->current;
a->current += size;
return p;
}
static char *string_area_strdup(struct string_area **ap, const char *src)
{
char *dest = string_area_malloc(ap, strlen(src) + 1);
return strcpy(dest, src);
}
static void list_file_entry(struct file_struct *f)
{
char perms[11];
if (!f->basename)
/* this can happen if duplicate names were removed */
return;
permstring(perms, f->mode);
if (preserve_links && S_ISLNK(f->mode)) {
rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
perms,
(double) f->length, timestring(f->modtime),
f_name(f), f->u.link);
} else {
rprintf(FINFO, "%s %11.0f %s %s\n",
perms,
(double) f->length, timestring(f->modtime),
f_name(f));
}
}
/**
* Stat either a symlink or its referent, depending on the settings of
* copy_links, copy_unsafe_links, etc.
*
* @retval -1 on error
*
* @retval 0 for success
*
* @post If @p path is a symlink, then @p linkbuf (of size @c
* MAXPATHLEN) contains the symlink target.
*
* @post @p buffer contains information about the link or the
* referrent as appropriate, if they exist.
**/
int readlink_stat(const char *path, STRUCT_STAT *buffer, char *linkbuf)
{
#if SUPPORT_LINKS
if (copy_links)
return do_stat(path, buffer);
if (do_lstat(path, buffer) == -1)
return -1;
if (S_ISLNK(buffer->st_mode)) {
int l = readlink((char *) path, linkbuf, MAXPATHLEN - 1);
if (l == -1)
return -1;
linkbuf[l] = 0;
if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
if (verbose > 1) {
rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
path, linkbuf);
}
return do_stat(path, buffer);
}
}
return 0;
#else
return do_stat(path, buffer);
#endif
}
int link_stat(const char *path, STRUCT_STAT * buffer)
{
#if SUPPORT_LINKS
if (copy_links)
return do_stat(path, buffer);
return do_lstat(path, buffer);
#else
return do_stat(path, buffer);
#endif
}
/*
* This function is used to check if a file should be included/excluded
* from the list of files based on its name and type etc. The value of
* exclude_level is set to either SERVER_EXCLUDES or ALL_EXCLUDES.
*/
static int check_exclude_file(char *fname, int is_dir, int exclude_level)
{
#if 0 /* This currently never happens, so avoid a useless compare. */
if (exclude_level == NO_EXCLUDES)
return 0;
#endif
if (fname) {
/* never exclude '.', even if somebody does --exclude '*' */
if (fname[0] == '.' && !fname[1])
return 0;
/* Handle the -R version of the '.' dir. */
if (fname[0] == '/') {
int len = strlen(fname);
if (fname[len-1] == '.' && fname[len-2] == '/')
return 0;
}
}
if (server_exclude_list
&& check_exclude(server_exclude_list, fname, is_dir))
return 1;
if (exclude_level != ALL_EXCLUDES)
return 0;
if (exclude_list && check_exclude(exclude_list, fname, is_dir))
return 1;
if (local_exclude_list
&& check_exclude(local_exclude_list, fname, is_dir))
return 1;
return 0;
}
/* used by the one_file_system code */
static dev_t filesystem_dev;
static void set_filesystem(char *fname)
{
STRUCT_STAT st;
if (link_stat(fname, &st) != 0)
return;
filesystem_dev = st.st_dev;
}
static int to_wire_mode(mode_t mode)
{
if (S_ISLNK(mode) && (_S_IFLNK != 0120000))
return (mode & ~(_S_IFMT)) | 0120000;
return (int) mode;
}
static mode_t from_wire_mode(int mode)
{
if ((mode & (_S_IFMT)) == 0120000 && (_S_IFLNK != 0120000))
return (mode & ~(_S_IFMT)) | _S_IFLNK;
return (mode_t) mode;
}
static void send_directory(int f, struct file_list *flist, char *dir);
static char *flist_dir;
static int flist_dir_len;
/**
* Make sure @p flist is big enough to hold at least @p flist->count
* entries.
**/
static void flist_expand(struct file_list *flist)
{
if (flist->count >= flist->malloced) {
void *new_ptr;
if (flist->malloced < 1000)
flist->malloced += 1000;
else
flist->malloced *= 2;
if (flist->files) {
new_ptr = realloc_array(flist->files,
struct file_struct *,
flist->malloced);
} else {
new_ptr = new_array(struct file_struct *,
flist->malloced);
}
if (verbose >= 2) {
rprintf(FINFO, "[%s] expand file_list to %.0f bytes, did%s move\n",
who_am_i(),
(double)sizeof(flist->files[0])
* flist->malloced,
(new_ptr == flist->files) ? " not" : "");
}
flist->files = (struct file_struct **) new_ptr;
if (!flist->files)
out_of_memory("flist_expand");
}
}
void send_file_entry(struct file_struct *file, int f, unsigned short base_flags)
{
unsigned short flags;
static time_t modtime;
static mode_t mode;
static DEV64_T rdev, rdev_high;
static DEV64_T dev;
static uid_t uid;
static gid_t gid;
static char lastname[MAXPATHLEN];
char *fname, fbuf[MAXPATHLEN];
int l1, l2;
if (f == -1)
return;
if (!file) {
write_byte(f, 0);
modtime = 0, mode = 0;
rdev = 0, rdev_high = 0, dev = 0;
uid = 0, gid = 0;
*lastname = '\0';
return;
}
io_write_phase = "send_file_entry";
fname = f_name_to(file, fbuf);
flags = base_flags;
if (file->mode == mode)
flags |= XMIT_SAME_MODE;
else
mode = file->mode;
if (preserve_devices) {
if (protocol_version < 28) {
if (IS_DEVICE(mode)) {
if (file->u.rdev == rdev) {
/* Set both flags to simplify the test
* when writing the data. */
flags |= XMIT_SAME_RDEV_pre28
| XMIT_SAME_HIGH_RDEV;
} else
rdev = file->u.rdev;
} else
rdev = 0;
} else if (IS_DEVICE(mode)) {
if ((file->u.rdev & ~0xFF) == rdev_high)
flags |= XMIT_SAME_HIGH_RDEV;
else {
rdev = file->u.rdev;
rdev_high = rdev & ~0xFF;
}
}
}
if (file->uid == uid)
flags |= XMIT_SAME_UID;
else
uid = file->uid;
if (file->gid == gid)
flags |= XMIT_SAME_GID;
else
gid = file->gid;
if (file->modtime == modtime)
flags |= XMIT_SAME_TIME;
else
modtime = file->modtime;
if (file->link_u.idev) {
if (file->F_DEV == dev) {
if (protocol_version >= 28)
flags |= XMIT_SAME_DEV;
} else
dev = file->F_DEV;
flags |= XMIT_HAS_IDEV_DATA;
}
for (l1 = 0;
lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
l1++) {}
l2 = strlen(fname+l1);
if (l1 > 0)
flags |= XMIT_SAME_NAME;
if (l2 > 255)
flags |= 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 (!flags && !S_ISDIR(mode))
flags |= XMIT_TOP_DIR;
if ((flags & 0xFF00) || !flags) {
flags |= XMIT_EXTENDED_FLAGS;
write_byte(f, flags);
write_byte(f, flags >> 8);
} else
write_byte(f, flags);
} else {
if (!(flags & 0xFF) && !S_ISDIR(mode))
flags |= XMIT_TOP_DIR;
if (!(flags & 0xFF))
flags |= XMIT_LONG_NAME;
write_byte(f, flags);
}
if (flags & XMIT_SAME_NAME)
write_byte(f, l1);
if (flags & XMIT_LONG_NAME)
write_int(f, l2);
else
write_byte(f, l2);
write_buf(f, fname + l1, l2);
write_longint(f, file->length);
if (!(flags & XMIT_SAME_TIME))
write_int(f, modtime);
if (!(flags & XMIT_SAME_MODE))
write_int(f, to_wire_mode(mode));
if (preserve_uid && !(flags & XMIT_SAME_UID)) {
add_uid(uid);
write_int(f, uid);
}
if (preserve_gid && !(flags & XMIT_SAME_GID)) {
add_gid(gid);
write_int(f, gid);
}
if (preserve_devices && IS_DEVICE(mode)) {
/* If XMIT_SAME_HIGH_RDEV is off, XMIT_SAME_RDEV_pre28 is
* also off. */
if (!(flags & XMIT_SAME_HIGH_RDEV))
write_int(f, rdev);
else if (protocol_version >= 28)
write_byte(f, rdev);
}
#if SUPPORT_LINKS
if (preserve_links && S_ISLNK(mode)) {
int len = strlen(file->u.link);
write_int(f, len);
write_buf(f, file->u.link, len);
}
#endif
#if SUPPORT_HARD_LINKS
if (flags & XMIT_HAS_IDEV_DATA) {
if (protocol_version < 26) {
/* 32-bit dev_t and ino_t */
write_int(f, dev);
write_int(f, file->F_INODE);
} else {
/* 64-bit dev_t and ino_t */
if (!(flags & XMIT_SAME_DEV))
write_longint(f, dev);
write_longint(f, file->F_INODE);
}
}
#endif
if (always_checksum) {
char *sum;
if (S_ISREG(mode))
sum = file->u.sum;
else if (protocol_version < 28) {
/* Prior to 28, we sent a useless set of nulls. */
sum = empty_sum;
} else
sum = NULL;
if (sum) {
write_buf(f, sum, protocol_version < 21? 2
: MD4_SUM_LENGTH);
}
}
strlcpy(lastname, fname, MAXPATHLEN);
io_write_phase = "unknown";
}
void receive_file_entry(struct file_struct **fptr, unsigned short flags, int f)
{
static time_t modtime;
static mode_t mode;
static DEV64_T rdev, rdev_high;
static DEV64_T dev;
static uid_t uid;
static gid_t gid;
static char lastname[MAXPATHLEN];
char thisname[MAXPATHLEN];
unsigned int l1 = 0, l2 = 0;
char *p;
struct file_struct *file;
if (!fptr) {
modtime = 0, mode = 0;
rdev = 0, rdev_high = 0, dev = 0;
uid = 0, gid = 0;
*lastname = '\0';
return;
}
if (flags & XMIT_SAME_NAME)
l1 = read_byte(f);
if (flags & XMIT_LONG_NAME)
l2 = read_int(f);
else
l2 = read_byte(f);
file = new(struct file_struct);
if (!file)
out_of_memory("receive_file_entry");
memset((char *) file, 0, sizeof(*file));
(*fptr) = file;
if (l2 >= MAXPATHLEN - l1) {
rprintf(FERROR,
"overflow: flags=0x%x l1=%d l2=%d lastname=%s\n",
flags, l1, l2, lastname);
overflow("receive_file_entry");
}
strlcpy(thisname, lastname, l1 + 1);
read_sbuf(f, &thisname[l1], l2);
thisname[l1 + l2] = 0;
strlcpy(lastname, thisname, MAXPATHLEN);
lastname[MAXPATHLEN - 1] = 0;
clean_fname(thisname);
if (sanitize_paths) {
sanitize_path(thisname, NULL);
}
if ((p = strrchr(thisname, '/'))) {
static char *lastdir;
*p = 0;
if (lastdir && strcmp(thisname, lastdir) == 0)
file->dirname = lastdir;
else {
file->dirname = strdup(thisname);
lastdir = file->dirname;
}
file->basename = strdup(p + 1);
} else {
file->dirname = NULL;
file->basename = strdup(thisname);
}
if (!file->basename)
out_of_memory("receive_file_entry 1");
file->flags = flags & XMIT_TOP_DIR ? FLAG_TOP_DIR : 0;
file->length = read_longint(f);
if (!(flags & XMIT_SAME_TIME))
modtime = (time_t)read_int(f);
file->modtime = modtime;
if (!(flags & XMIT_SAME_MODE))
mode = from_wire_mode(read_int(f));
file->mode = mode;
if (preserve_uid) {
if (!(flags & XMIT_SAME_UID))
uid = (uid_t)read_int(f);
file->uid = uid;
}
if (preserve_gid) {
if (!(flags & XMIT_SAME_GID))
gid = (gid_t)read_int(f);
file->gid = gid;
}
if (preserve_devices) {
if (protocol_version < 28) {
if (IS_DEVICE(mode)) {
if (!(flags & XMIT_SAME_RDEV_pre28))
rdev = (DEV64_T)read_int(f);
file->u.rdev = rdev;
} else
rdev = 0;
} else if (IS_DEVICE(mode)) {
if (!(flags & XMIT_SAME_HIGH_RDEV)) {
rdev = (DEV64_T)read_int(f);
rdev_high = rdev & ~0xFF;
} else
rdev = rdev_high | (DEV64_T)read_byte(f);
file->u.rdev = rdev;
}
}
if (preserve_links && S_ISLNK(mode)) {
int len = read_int(f);
if (len < 0 || len >= MAXPATHLEN) {
rprintf(FERROR, "overflow: len=%d\n", len);
overflow("receive_file_entry");
}
if (!(file->u.link = new_array(char, len + 1)))
out_of_memory("receive_file_entry 2");
read_sbuf(f, file->u.link, len);
if (sanitize_paths)
sanitize_path(file->u.link, file->dirname);
}
#if SUPPORT_HARD_LINKS
if (preserve_hard_links && protocol_version < 28 && S_ISREG(mode))
flags |= XMIT_HAS_IDEV_DATA;
if (flags & XMIT_HAS_IDEV_DATA) {
if (!(file->link_u.idev = new(struct idev)))
out_of_memory("file inode data");
if (protocol_version < 26) {
dev = read_int(f);
file->F_INODE = read_int(f);
} else {
if (!(flags & XMIT_SAME_DEV))
dev = read_longint(f);
file->F_INODE = read_longint(f);
}
file->F_DEV = dev;
}
#endif
if (always_checksum) {
char *sum;
if (S_ISREG(mode)) {
sum = file->u.sum = new_array(char, MD4_SUM_LENGTH);
if (!sum)
out_of_memory("md4 sum");
} else if (protocol_version < 28) {
/* Prior to 28, we get a useless set of nulls. */
sum = empty_sum;
} else
sum = NULL;
if (sum) {
read_buf(f, sum, protocol_version < 21? 2
: MD4_SUM_LENGTH);
}
}
if (!preserve_perms) {
extern int orig_umask;
/* set an appropriate set of permissions based on original
* permissions and umask. This emulates what GNU cp does */
file->mode &= ~orig_umask;
}
}
#define STRDUP(ap, p) (ap ? string_area_strdup(ap, p) : strdup(p))
/* IRIX cc cares that the operands to the ternary have the same type. */
#define MALLOC(ap, i) (ap ? (void*) string_area_malloc(ap, i) : malloc(i))
/**
* Create a file_struct for a named file by reading its stat()
* information and performing extensive checks against global
* options.
*
* @return the new file, or NULL if there was an error or this file
* should be excluded.
*
* @todo There is a small optimization opportunity here to avoid
* stat()ing the file in some circumstances, which has a certain cost.
* We are called immediately after doing readdir(), and so we may
* already know the d_type of the file. We could for example avoid
* statting directories if we're not recursing, but this is not a very
* important case. Some systems may not have d_type.
**/
struct file_struct *make_file(char *fname, struct string_area **ap,
int exclude_level)
{
struct file_struct *file;
STRUCT_STAT st;
char sum[SUM_LENGTH];
char *p;
char thisname[MAXPATHLEN];
char linkname[MAXPATHLEN];
unsigned short flags = 0;
if (strlcpy(thisname, fname, sizeof thisname)
>= sizeof thisname - flist_dir_len) {
rprintf(FINFO, "skipping overly long name: %s\n", fname);
return NULL;
}
clean_fname(thisname);
if (sanitize_paths)
sanitize_path(thisname, NULL);
memset(sum, 0, SUM_LENGTH);
if (readlink_stat(thisname, &st, linkname) != 0) {
int save_errno = errno;
if (errno == ENOENT && exclude_level != NO_EXCLUDES) {
/* either symlink pointing nowhere or file that
* was removed during rsync run; see if excluded
* before reporting an error */
if (check_exclude_file(thisname, 0, exclude_level)) {
/* file is excluded anyway, ignore silently */
return NULL;
}
}
io_error |= IOERR_GENERAL;
rprintf(FERROR, "readlink %s failed: %s\n",
full_fname(thisname), strerror(save_errno));
return NULL;
}
/* backup.c calls us with exclude_level set to NO_EXCLUDES. */
if (exclude_level == NO_EXCLUDES)
goto skip_excludes;
if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
rprintf(FINFO, "skipping directory %s\n", thisname);
return NULL;
}
if (one_file_system && st.st_dev != filesystem_dev) {
/* We allow a directory though to preserve the mount point.
* However, flag it so that we don't recurse. */
if (!S_ISDIR(st.st_mode))
return NULL;
flags |= FLAG_MOUNT_POINT;
}
if (check_exclude_file(thisname, S_ISDIR(st.st_mode) != 0, exclude_level))
return NULL;
if (lp_ignore_nonreadable(module_id) && access(thisname, R_OK) != 0)
return NULL;
skip_excludes:
if (verbose > 2) {
rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
who_am_i(), thisname, exclude_level);
}
file = new(struct file_struct);
if (!file)
out_of_memory("make_file");
memset((char *) file, 0, sizeof(*file));
file->flags = flags;
if ((p = strrchr(thisname, '/'))) {
static char *lastdir;
*p = 0;
if (lastdir && strcmp(thisname, lastdir) == 0)
file->dirname = lastdir;
else {
file->dirname = strdup(thisname);
lastdir = file->dirname;
}
file->basename = STRDUP(ap, p + 1);
*p = '/';
} else {
file->dirname = NULL;
file->basename = STRDUP(ap, thisname);
}
file->modtime = st.st_mtime;
file->length = st.st_size;
file->mode = st.st_mode;
file->uid = st.st_uid;
file->gid = st.st_gid;
if (preserve_hard_links) {
if (protocol_version < 28 ? S_ISREG(st.st_mode)
: !S_ISDIR(st.st_mode) && st.st_nlink > 1) {
if (!(file->link_u.idev = new(struct idev)))
out_of_memory("file inode data");
file->F_DEV = st.st_dev;
file->F_INODE = st.st_ino;
}
}
#ifdef HAVE_STRUCT_STAT_ST_RDEV
if (preserve_devices && IS_DEVICE(st.st_mode))
file->u.rdev = st.st_rdev;
#endif
#if SUPPORT_LINKS
if (S_ISLNK(st.st_mode))
file->u.link = STRDUP(ap, linkname);
#endif
if (always_checksum && S_ISREG(st.st_mode)) {
if (!(file->u.sum = (char*)MALLOC(ap, MD4_SUM_LENGTH)))
out_of_memory("md4 sum");
file_checksum(thisname, file->u.sum, st.st_size);
}
file->basedir = flist_dir;
if (!S_ISDIR(st.st_mode))
stats.total_size += st.st_size;
return file;
}
void send_file_name(int f, struct file_list *flist, char *fname,
int recursive, unsigned short base_flags)
{
struct file_struct *file;
char fbuf[MAXPATHLEN];
extern int delete_excluded;
/* f is set to -1 when calculating deletion file list */
file = make_file(fname, &flist->string_area,
f == -1 && delete_excluded? SERVER_EXCLUDES
: ALL_EXCLUDES);
if (!file)
return;
maybe_emit_filelist_progress(flist);
flist_expand(flist);
if (write_batch)
file->flags |= FLAG_TOP_DIR;
if (file->basename[0]) {
flist->files[flist->count++] = file;
send_file_entry(file, f, base_flags);
}
if (recursive && S_ISDIR(file->mode)
&& !(file->flags & FLAG_MOUNT_POINT)) {
struct exclude_struct **last_exclude_list = local_exclude_list;
send_directory(f, flist, f_name_to(file, fbuf));
local_exclude_list = last_exclude_list;
return;
}
}
static void send_directory(int f, struct file_list *flist, char *dir)
{
DIR *d;
struct dirent *di;
char fname[MAXPATHLEN];
unsigned int offset;
char *p;
d = opendir(dir);
if (!d) {
io_error |= IOERR_GENERAL;
rprintf(FERROR, "opendir %s failed: %s\n",
full_fname(dir), strerror(errno));
return;
}
offset = strlcpy(fname, dir, MAXPATHLEN);
p = fname + offset;
if (offset >= MAXPATHLEN || p[-1] != '/') {
if (offset >= MAXPATHLEN - 1) {
io_error |= IOERR_GENERAL;
rprintf(FERROR, "skipping long-named directory: %s\n",
full_fname(fname));
closedir(d);
return;
}
*p++ = '/';
offset++;
}
local_exclude_list = NULL;
if (cvs_exclude) {
if (strlcpy(p, ".cvsignore", MAXPATHLEN - offset)
< MAXPATHLEN - offset)
add_exclude_file(&local_exclude_list,fname,MISSING_OK,ADD_EXCLUDE);
else {
io_error |= IOERR_GENERAL;
rprintf(FINFO,
"cannot cvs-exclude in long-named directory %s\n",
full_fname(fname));
}
}
for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
char *dname = d_name(di);
if (dname[0] == '.' && (dname[1] == '\0'
|| (dname[1] == '.' && dname[2] == '\0')))
continue;
if (strlcpy(p, dname, MAXPATHLEN - offset) < MAXPATHLEN - offset)
send_file_name(f, flist, fname, recurse, 0);
else {
io_error |= IOERR_GENERAL;
rprintf(FINFO,
"cannot send long-named file %s\n",
full_fname(fname));
}
}
if (errno) {
io_error |= IOERR_GENERAL;
rprintf(FERROR, "readdir(%s): (%d) %s\n",
dir, errno, strerror(errno));
}
if (local_exclude_list)
free_exclude_list(&local_exclude_list); /* Zeros pointer too */
closedir(d);
}
/**
* The delete_files() function in receiver.c sets f to -1 so that we just
* construct the file list in memory without sending it over the wire. It
* also has the side-effect of ignoring user-excludes if delete_excluded
* is set (so that the delete list includes user-excluded files).
**/
struct file_list *send_file_list(int f, int argc, char *argv[])
{
int l;
STRUCT_STAT st;
char *p, *dir, olddir[sizeof curr_dir];
char lastpath[MAXPATHLEN] = "";
struct file_list *flist;
int64 start_write;
int use_ff_fd = 0;
if (show_filelist_p() && f != -1)
start_filelist_progress("building file list");
start_write = stats.total_written;
flist = flist_new();
if (f != -1) {
io_start_buffering_out(f);
if (filesfrom_fd >= 0) {
if (argv[0] && !push_dir(argv[0])) {
rprintf(FERROR, "push_dir %s failed: %s\n",
full_fname(argv[0]), strerror(errno));
exit_cleanup(RERR_FILESELECT);
}
use_ff_fd = 1;
}
}
while (1) {
char fname2[MAXPATHLEN];
char *fname = fname2;
if (use_ff_fd) {
if (read_filesfrom_line(filesfrom_fd, fname) == 0)
break;
sanitize_path(fname, NULL);
} else {
if (argc-- == 0)
break;
strlcpy(fname, *argv++, MAXPATHLEN);
if (sanitize_paths)
sanitize_path(fname, NULL);
}
l = strlen(fname);
if (fname[l - 1] == '/') {
if (l == 2 && fname[0] == '.') {
/* Turn "./" into just "." rather than "./." */
fname[1] = '\0';
} else if (l < MAXPATHLEN) {
fname[l++] = '.';
fname[l] = '\0';
}
}
if (link_stat(fname, &st) != 0) {
if (f != -1) {
io_error |= IOERR_GENERAL;
rprintf(FERROR, "link_stat %s failed: %s\n",
full_fname(fname), strerror(errno));
}
continue;
}
if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
rprintf(FINFO, "skipping directory %s\n", fname);
continue;
}
dir = NULL;
olddir[0] = '\0';
if (!relative_paths) {
p = strrchr(fname, '/');
if (p) {
*p = 0;
if (p == fname)
dir = "/";
else
dir = fname;
fname = p + 1;
}
} else if (f != -1 && implied_dirs && (p=strrchr(fname,'/')) && p != fname) {
/* this ensures we send the intermediate directories,
thus getting their permissions right */
char *lp = lastpath, *fn = fname, *slash = fname;
*p = 0;
/* Skip any initial directories in our path that we
* have in common with lastpath. */
while (*fn && *lp == *fn) {
if (*fn == '/')
slash = fn;
lp++, fn++;
}
*p = '/';
if (fn != p || (*lp && *lp != '/')) {
int copy_links_saved = copy_links;
int recurse_saved = recurse;
copy_links = copy_unsafe_links;
/* set recurse to 1 to prevent make_file
* from ignoring directory, but still
* turn off the recursive parameter to
* send_file_name */
recurse = 1;
while ((slash = strchr(slash+1, '/')) != 0) {
*slash = 0;
send_file_name(f, flist, fname, 0, 0);
*slash = '/';
}
copy_links = copy_links_saved;
recurse = recurse_saved;
*p = 0;
strlcpy(lastpath, fname, sizeof lastpath);
*p = '/';
}
}
if (!*fname)
fname = ".";
if (dir && *dir) {
static char *lastdir;
static int lastdir_len;
strcpy(olddir, curr_dir); /* can't overflow */
if (!push_dir(dir)) {
io_error |= IOERR_GENERAL;
rprintf(FERROR, "push_dir %s failed: %s\n",
full_fname(dir), strerror(errno));
continue;
}
if (lastdir && strcmp(lastdir, dir) == 0) {
flist_dir = lastdir;
flist_dir_len = lastdir_len;
} else {
flist_dir = lastdir = strdup(dir);
flist_dir_len = lastdir_len = strlen(dir);
}
}
if (one_file_system)
set_filesystem(fname);
send_file_name(f, flist, fname, recurse, XMIT_TOP_DIR);
if (olddir[0]) {
flist_dir = NULL;
flist_dir_len = 0;
if (!pop_dir(olddir)) {
rprintf(FERROR, "pop_dir %s failed: %s\n",
full_fname(dir), strerror(errno));
exit_cleanup(RERR_FILESELECT);
}
}
}
if (f != -1) {
send_file_entry(NULL, f, 0);
if (show_filelist_p())
finish_filelist_progress(flist);
}
clean_flist(flist, 0, 0);
if (f != -1) {
/* Now send the uid/gid list. This was introduced in
* protocol version 15 */
send_uid_list(f);
/* send the io_error flag */
write_int(f, lp_ignore_errors(module_id) ? 0 : io_error);
io_end_buffering();
stats.flist_size = stats.total_written - start_write;
stats.num_files = flist->count;
if (write_batch)
write_batch_flist_info(flist->count, flist->files);
}
if (verbose > 2)
rprintf(FINFO, "send_file_list done\n");
return flist;
}
struct file_list *recv_file_list(int f)
{
struct file_list *flist;
unsigned short flags;
int64 start_read;
extern int list_only;
if (show_filelist_p())
start_filelist_progress("receiving file list");
start_read = stats.total_read;
flist = new(struct file_list);
if (!flist)
goto oom;
flist->count = 0;
flist->malloced = 1000;
flist->files = new_array(struct file_struct *, flist->malloced);
if (!flist->files)
goto oom;
while ((flags = read_byte(f)) != 0) {
int i = flist->count;
flist_expand(flist);
if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
flags |= read_byte(f) << 8;
receive_file_entry(&flist->files[i], flags, f);
if (S_ISREG(flist->files[i]->mode))
stats.total_size += flist->files[i]->length;
flist->count++;
maybe_emit_filelist_progress(flist);
if (verbose > 2) {
rprintf(FINFO, "recv_file_name(%s)\n",
f_name(flist->files[i]));
}
}
receive_file_entry(NULL, 0, 0); /* Signal that we're done. */
if (verbose > 2)
rprintf(FINFO, "received %d names\n", flist->count);
if (show_filelist_p())
finish_filelist_progress(flist);
clean_flist(flist, relative_paths, 1);
if (f != -1) {
/* Now send the uid/gid list. This was introduced in
* protocol version 15 */
recv_uid_list(f, flist);
if (!read_batch) {
/* Recv the io_error flag */
if (lp_ignore_errors(module_id) || ignore_errors)
read_int(f);
else
io_error |= read_int(f);
}
}
if (list_only) {
int i;
for (i = 0; i < flist->count; i++)
list_file_entry(flist->files[i]);
}
if (verbose > 2)
rprintf(FINFO, "recv_file_list done\n");
stats.flist_size = stats.total_read - start_read;
stats.num_files = flist->count;
return flist;
oom:
out_of_memory("recv_file_list");
return NULL; /* not reached */
}
int file_compare(struct file_struct **file1, struct file_struct **file2)
{
struct file_struct *f1 = *file1;
struct file_struct *f2 = *file2;
if (!f1->basename && !f2->basename)
return 0;
if (!f1->basename)
return -1;
if (!f2->basename)
return 1;
if (f1->dirname == f2->dirname)
return u_strcmp(f1->basename, f2->basename);
return f_name_cmp(f1, f2);
}
int flist_find(struct file_list *flist, struct file_struct *f)
{
int low = 0, high = flist->count - 1;
while (high >= 0 && !flist->files[high]->basename) high--;
if (high < 0)
return -1;
while (low != high) {
int mid = (low + high) / 2;
int ret = file_compare(&flist->files[flist_up(flist, mid)],&f);
if (ret == 0)
return flist_up(flist, mid);
if (ret > 0)
high = mid;
else
low = mid + 1;
}
if (file_compare(&flist->files[flist_up(flist, low)], &f) == 0)
return flist_up(flist, low);
return -1;
}
/*
* free up one file
*/
void free_file(struct file_struct *file)
{
if (!file)
return;
if (file->basename)
free(file->basename);
if (!IS_DEVICE(file->mode) && file->u.link)
free(file->u.link); /* Handles u.sum too. */
if (file->link_u.idev)
free((char*)file->link_u.idev); /* Handles link_u.links too. */
*file = null_file;
}
/*
* allocate a new file list
*/
struct file_list *flist_new(void)
{
struct file_list *flist;
flist = new(struct file_list);
if (!flist)
out_of_memory("send_file_list");
flist->count = 0;
flist->malloced = 0;
flist->files = NULL;
#if ARENA_SIZE > 0
flist->string_area = string_area_new(0);
#else
flist->string_area = NULL;
#endif
return flist;
}
/*
* free up all elements in a flist
*/
void flist_free(struct file_list *flist)
{
int i;
for (i = 1; i < flist->count; i++) {
if (!flist->string_area)
free_file(flist->files[i]);
free(flist->files[i]);
}
/* FIXME: I don't think we generally need to blank the flist
* since it's about to be freed. This will just cause more
* memory traffic. If you want a freed-memory debugger, you
* know where to get it. */
memset((char *) flist->files, 0,
sizeof(flist->files[0]) * flist->count);
free(flist->files);
if (flist->string_area)
string_area_free(flist->string_area);
memset((char *) flist, 0, sizeof(*flist));
free(flist);
}
/*
* This routine ensures we don't have any duplicate names in our file list.
* duplicate names can cause corruption because of the pipelining
*/
static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
{
int i, prev_i = 0;
if (!flist || flist->count == 0)
return;
qsort(flist->files, flist->count,
sizeof(flist->files[0]), (int (*)()) file_compare);
for (i = no_dups? 0 : flist->count; i < flist->count; i++) {
if (flist->files[i]->basename) {
prev_i = i;
break;
}
}
while (++i < flist->count) {
if (!flist->files[i]->basename)
continue;
if (f_name_cmp(flist->files[i], flist->files[prev_i]) == 0) {
if (verbose > 1 && !am_server) {
rprintf(FINFO,
"removing duplicate name %s from file list %d\n",
f_name(flist->files[i]), i);
}
/* Make sure that if we unduplicate '.', that we don't
* lose track of a user-specified starting point (or
* else deletions will mysteriously fail with -R). */
if (flist->files[i]->flags & FLAG_TOP_DIR)
flist->files[prev_i]->flags |= FLAG_TOP_DIR;
/* it's not great that the flist knows the semantics of
* the file memory usage, but i'd rather not add a flag
* byte to that struct.
* XXX can i use a bit in the flags field? */
if (flist->string_area)
flist->files[i][0] = null_file;
else
free_file(flist->files[i]);
} else
prev_i = i;
}
if (strip_root) {
/* we need to strip off the root directory in the case
of relative paths, but this must be done _after_
the sorting phase */
for (i = 0; i < flist->count; i++) {
if (flist->files[i]->dirname &&
flist->files[i]->dirname[0] == '/') {
memmove(&flist->files[i]->dirname[0],
&flist->files[i]->dirname[1],
strlen(flist->files[i]->dirname));
}
if (flist->files[i]->dirname &&
!flist->files[i]->dirname[0]) {
flist->files[i]->dirname = NULL;
}
}
}
if (verbose <= 3)
return;
for (i = 0; i < flist->count; i++) {
rprintf(FINFO, "[%s] i=%d %s %s %s mode=0%o len=%.0f\n",
who_am_i(), i,
NS(flist->files[i]->basedir),
NS(flist->files[i]->dirname),
NS(flist->files[i]->basename),
(int) flist->files[i]->mode,
(double) flist->files[i]->length);
}
}
enum fnc_state { fnc_DIR, fnc_SLASH, fnc_BASE };
/* Compare the names of two file_struct entities, just like strcmp()
* would do if it were operating on the joined strings. We assume
* that there are no 0-length strings.
*/
int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
{
int dif;
const uchar *c1, *c2;
enum fnc_state state1, state2;
if (!f1 || !f1->basename) {
if (!f2 || !f2->basename)
return 0;
return -1;
}
if (!f2 || !f2->basename)
return 1;
if (!(c1 = (uchar*)f1->dirname)) {
state1 = fnc_BASE;
c1 = (uchar*)f1->basename;
} else
state1 = fnc_DIR;
if (!(c2 = (uchar*)f2->dirname)) {
state2 = fnc_BASE;
c2 = (uchar*)f2->basename;
} else
state2 = fnc_DIR;
while (1) {
if ((dif = (int)*c1 - (int)*c2) != 0)
break;
if (!*++c1) {
switch (state1) {
case fnc_DIR:
state1 = fnc_SLASH;
c1 = (uchar*)"/";
break;
case fnc_SLASH:
state1 = fnc_BASE;
c1 = (uchar*)f1->basename;
break;
case fnc_BASE:
break;
}
}
if (!*++c2) {
switch (state2) {
case fnc_DIR:
state2 = fnc_SLASH;
c2 = (uchar*)"/";
break;
case fnc_SLASH:
state2 = fnc_BASE;
c2 = (uchar*)f2->basename;
break;
case fnc_BASE:
if (!*c1)
return 0;
break;
}
}
}
return dif;
}
/* Return a copy of the full filename of a flist entry, using the indicated
* buffer. No size-checking is done because we checked the size when creating
* the file_struct entry.
*/
char *f_name_to(struct file_struct *f, char *fbuf)
{
if (!f || !f->basename)
return NULL;
if (f->dirname) {
int len = strlen(f->dirname);
memcpy(fbuf, f->dirname, len);
fbuf[len] = '/';
strcpy(fbuf + len + 1, f->basename);
} else
strcpy(fbuf, f->basename);
return fbuf;
}
/* Like f_name_to(), but we rotate through 5 static buffers of our own.
*/
char *f_name(struct file_struct *f)
{
static char names[5][MAXPATHLEN];
static unsigned int n;
n = (n + 1) % (sizeof names / sizeof names[0]);
return f_name_to(f, names[n]);
}
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