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rsync221.zip
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flist.c
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1999-03-04
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979 lines
/*
Copyright (C) Andrew Tridgell 1996
Copyright (C) Paul Mackerras 1996
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.
*/
/* generate and receive file lists */
#include "rsync.h"
extern struct stats stats;
extern int csum_length;
extern int verbose;
extern int am_server;
extern int always_checksum;
extern int cvs_exclude;
extern int recurse;
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 copy_links;
extern int remote_version;
extern int io_error;
static struct exclude_struct **local_exclude_list;
static void clean_flist(struct file_list *flist, int strip_root);
static void list_file_entry(struct file_struct *f)
{
char perms[11] = "----------";
char *perm_map = "rwxrwxrwx";
int i;
if (!f->basename)
/* this can happen if duplicate names were removed */
return;
for (i=0;i<9;i++) {
if (f->mode & (1<<i)) perms[9-i] = perm_map[8-i];
}
if (S_ISLNK(f->mode)) perms[0] = 'l';
if (S_ISDIR(f->mode)) perms[0] = 'd';
#ifndef __EMX__
if (S_ISBLK(f->mode)) perms[0] = 'b';
#endif
if (S_ISCHR(f->mode)) perms[0] = 'c';
if (S_ISSOCK(f->mode)) perms[0] = 's';
if (S_ISFIFO(f->mode)) perms[0] = 'p';
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->link);
} else {
rprintf(FINFO,"%s %11.0f %s %s\n",
perms,
(double)f->length, timestring(f->modtime), f_name(f));
}
}
int link_stat(const char *Path, STRUCT_STAT *Buffer)
{
#if SUPPORT_LINKS
if (copy_links) {
return do_stat(Path, Buffer);
} else {
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
*/
static int match_file_name(char *fname,STRUCT_STAT *st)
{
if (check_exclude(fname,local_exclude_list,st)) {
if (verbose > 2)
rprintf(FINFO,"excluding file %s\n",fname);
return 0;
}
return 1;
}
/* 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)
{
#ifndef __EMX__
if (S_ISLNK(mode) && (S_IFLNK != 0120000)) {
return (mode & ~(_S_IFMT)) | 0120000;
}
#endif
return (int)mode;
}
static mode_t from_wire_mode(int mode)
{
#ifndef __EMX__
if ((mode & (_S_IFMT)) == 0120000 && (S_IFLNK != 0120000)) {
return (mode & ~(_S_IFMT)) | S_IFLNK;
}
#endif
return (mode_t)mode;
}
static void send_directory(int f,struct file_list *flist,char *dir);
static char *flist_dir;
static void send_file_entry(struct file_struct *file,int f,unsigned base_flags)
{
unsigned char flags;
static time_t last_time;
static mode_t last_mode;
static dev_t last_rdev;
static uid_t last_uid;
static gid_t last_gid;
static char lastname[MAXPATHLEN];
char *fname;
int l1,l2;
if (f == -1) return;
if (!file) {
write_byte(f,0);
return;
}
fname = f_name(file);
flags = base_flags;
if (file->mode == last_mode) flags |= SAME_MODE;
if (file->rdev == last_rdev) flags |= SAME_RDEV;
if (file->uid == last_uid) flags |= SAME_UID;
if (file->gid == last_gid) flags |= SAME_GID;
if (file->modtime == last_time) flags |= SAME_TIME;
for (l1=0;lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);l1++) ;
l2 = strlen(fname) - l1;
if (l1 > 0) flags |= SAME_NAME;
if (l2 > 255) flags |= LONG_NAME;
/* we must make sure we don't send a zero flags byte or the other
end will terminate the flist transfer */
if (flags == 0 && !S_ISDIR(file->mode)) flags |= FLAG_DELETE;
if (flags == 0) flags |= LONG_NAME;
write_byte(f,flags);
if (flags & SAME_NAME)
write_byte(f,l1);
if (flags & LONG_NAME)
write_int(f,l2);
else
write_byte(f,l2);
write_buf(f,fname+l1,l2);
write_longint(f,file->length);
if (!(flags & SAME_TIME))
write_int(f,(int)file->modtime);
if (!(flags & SAME_MODE))
write_int(f,to_wire_mode(file->mode));
if (preserve_uid && !(flags & SAME_UID)) {
add_uid(file->uid);
write_int(f,(int)file->uid);
}
if (preserve_gid && !(flags & SAME_GID)) {
add_gid(file->gid);
write_int(f,(int)file->gid);
}
if (preserve_devices && IS_DEVICE(file->mode) && !(flags & SAME_RDEV))
write_int(f,(int)file->rdev);
#if SUPPORT_LINKS
if (preserve_links && S_ISLNK(file->mode)) {
write_int(f,strlen(file->link));
write_buf(f,file->link,strlen(file->link));
}
#endif
#if SUPPORT_HARD_LINKS
if (preserve_hard_links && S_ISREG(file->mode)) {
write_int(f,(int)file->dev);
write_int(f,(int)file->inode);
}
#endif
if (always_checksum) {
write_buf(f,file->sum,csum_length);
}
last_mode = file->mode;
last_rdev = file->rdev;
last_uid = file->uid;
last_gid = file->gid;
last_time = file->modtime;
strlcpy(lastname,fname,MAXPATHLEN);
lastname[MAXPATHLEN-1] = 0;
}
static void receive_file_entry(struct file_struct **fptr,
unsigned flags,int f)
{
static time_t last_time;
static mode_t last_mode;
static dev_t last_rdev;
static uid_t last_uid;
static gid_t last_gid;
static char lastname[MAXPATHLEN];
char thisname[MAXPATHLEN];
int l1=0,l2=0;
char *p;
struct file_struct *file;
if (flags & SAME_NAME)
l1 = read_byte(f);
if (flags & LONG_NAME)
l2 = read_int(f);
else
l2 = read_byte(f);
file = (struct file_struct *)malloc(sizeof(*file));
if (!file) out_of_memory("receive_file_entry");
memset((char *)file, 0, sizeof(*file));
(*fptr) = file;
if (l2 >= MAXPATHLEN-l1) 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 ((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;
file->length = read_longint(f);
file->modtime = (flags & SAME_TIME) ? last_time : (time_t)read_int(f);
file->mode = (flags & SAME_MODE) ? last_mode : from_wire_mode(read_int(f));
if (preserve_uid)
file->uid = (flags & SAME_UID) ? last_uid : (uid_t)read_int(f);
if (preserve_gid)
file->gid = (flags & SAME_GID) ? last_gid : (gid_t)read_int(f);
if (preserve_devices && IS_DEVICE(file->mode))
file->rdev = (flags & SAME_RDEV) ? last_rdev : (dev_t)read_int(f);
if (preserve_links && S_ISLNK(file->mode)) {
int l = read_int(f);
file->link = (char *)malloc(l+1);
if (!file->link) out_of_memory("receive_file_entry 2");
read_sbuf(f,file->link,l);
}
#if SUPPORT_HARD_LINKS
if (preserve_hard_links && S_ISREG(file->mode)) {
file->dev = read_int(f);
file->inode = read_int(f);
}
#endif
if (always_checksum) {
file->sum = (char *)malloc(MD4_SUM_LENGTH);
if (!file->sum) out_of_memory("md4 sum");
read_buf(f,file->sum,csum_length);
}
last_mode = file->mode;
last_rdev = file->rdev;
last_uid = file->uid;
last_gid = file->gid;
last_time = file->modtime;
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;
}
}
/* determine if a file in a different filesstem should be skipped
when one_file_system is set. We bascally only want to include
the mount points - but they can be hard to find! */
static int skip_filesystem(char *fname, STRUCT_STAT *st)
{
STRUCT_STAT st2;
char *p = strrchr(fname, '/');
/* skip all but directories */
if (!S_ISDIR(st->st_mode)) return 1;
/* if its not a subdirectory then allow */
if (!p) return 0;
*p = 0;
if (link_stat(fname, &st2)) {
*p = '/';
return 0;
}
*p = '/';
return (st2.st_dev != filesystem_dev);
}
static struct file_struct *make_file(char *fname)
{
struct file_struct *file;
STRUCT_STAT st;
char sum[SUM_LENGTH];
char *p;
char cleaned_name[MAXPATHLEN];
strlcpy(cleaned_name, fname, MAXPATHLEN);
cleaned_name[MAXPATHLEN-1] = 0;
clean_fname(cleaned_name);
fname = cleaned_name;
memset(sum,0,SUM_LENGTH);
if (link_stat(fname,&st) != 0) {
io_error = 1;
rprintf(FERROR,"%s: %s\n",
fname,strerror(errno));
return NULL;
}
if (S_ISDIR(st.st_mode) && !recurse) {
rprintf(FINFO,"skipping directory %s\n",fname);
return NULL;
}
if (one_file_system && st.st_dev != filesystem_dev) {
if (skip_filesystem(fname, &st))
return NULL;
}
if (!match_file_name(fname,&st))
return NULL;
if (verbose > 2)
rprintf(FINFO,"make_file(%s)\n",fname);
file = (struct file_struct *)malloc(sizeof(*file));
if (!file) out_of_memory("make_file");
memset((char *)file,0,sizeof(*file));
if ((p = strrchr(fname,'/'))) {
static char *lastdir;
*p = 0;
if (lastdir && strcmp(fname, lastdir)==0) {
file->dirname = lastdir;
} else {
file->dirname = strdup(fname);
lastdir = file->dirname;
}
file->basename = strdup(p+1);
*p = '/';
} else {
file->dirname = NULL;
file->basename = strdup(fname);
}
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;
file->dev = st.st_dev;
file->inode = st.st_ino;
#ifdef HAVE_ST_RDEV
file->rdev = st.st_rdev;
#endif
#if SUPPORT_LINKS
if (S_ISLNK(st.st_mode)) {
int l;
char lnk[MAXPATHLEN];
if ((l=readlink(fname,lnk,MAXPATHLEN-1)) == -1) {
io_error=1;
rprintf(FERROR,"readlink %s : %s\n",
fname,strerror(errno));
return NULL;
}
lnk[l] = 0;
file->link = strdup(lnk);
}
#endif
if (always_checksum) {
file->sum = (char *)malloc(MD4_SUM_LENGTH);
if (!file->sum) out_of_memory("md4 sum");
/* drat. we have to provide a null checksum for non-regular
files in order to be compatible with earlier versions
of rsync */
if (S_ISREG(st.st_mode)) {
file_checksum(fname,file->sum,st.st_size);
} else {
memset(file->sum, 0, MD4_SUM_LENGTH);
}
}
if (flist_dir) {
static char *lastdir;
if (lastdir && strcmp(lastdir, flist_dir)==0) {
file->basedir = lastdir;
} else {
file->basedir = strdup(flist_dir);
lastdir = file->basedir;
}
} else {
file->basedir = NULL;
}
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 base_flags)
{
struct file_struct *file;
file = make_file(fname);
if (!file) return;
if (flist->count >= flist->malloced) {
if (flist->malloced < 1000)
flist->malloced += 1000;
else
flist->malloced *= 2;
flist->files = (struct file_struct **)realloc(flist->files,
sizeof(flist->files[0])*
flist->malloced);
if (!flist->files)
out_of_memory("send_file_name");
}
if (strcmp(file->basename,"")) {
flist->files[flist->count++] = file;
send_file_entry(file,f,base_flags);
}
if (S_ISDIR(file->mode) && recursive) {
struct exclude_struct **last_exclude_list = local_exclude_list;
send_directory(f,flist,f_name(file));
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];
int l;
char *p;
d = opendir(dir);
if (!d) {
io_error = 1;
rprintf(FERROR,"opendir(%s): %s\n",
dir,strerror(errno));
return;
}
strlcpy(fname,dir,MAXPATHLEN);
l = strlen(fname);
if (fname[l-1] != '/') {
if (l == MAXPATHLEN-1) {
io_error = 1;
rprintf(FERROR,"skipping long-named directory %s\n",fname);
closedir(d);
return;
}
strlcat(fname,"/", MAXPATHLEN);
l++;
}
p = fname + strlen(fname);
local_exclude_list = NULL;
if (cvs_exclude) {
if (strlen(fname) + strlen(".cvsignore") <= MAXPATHLEN-1) {
strcpy(p,".cvsignore");
local_exclude_list = make_exclude_list(fname,NULL,0,0);
} else {
io_error = 1;
rprintf(FINFO,"cannot cvs-exclude in long-named directory %s\n",fname);
}
}
for (di=readdir(d); di; di=readdir(d)) {
char *dname = d_name(di);
if (strcmp(dname,".")==0 ||
strcmp(dname,"..")==0)
continue;
strlcpy(p,dname,MAXPATHLEN-l);
send_file_name(f,flist,fname,recurse,0);
}
if (local_exclude_list) {
add_exclude_list("!", &local_exclude_list, 0);
}
closedir(d);
}
struct file_list *send_file_list(int f,int argc,char *argv[])
{
int i,l;
STRUCT_STAT st;
char *p,*dir,*olddir;
char lastpath[MAXPATHLEN]="";
struct file_list *flist;
int64 start_write;
if (verbose && recurse && !am_server && f != -1) {
rprintf(FINFO,"building file list ... ");
rflush(FINFO);
}
start_write = stats.total_written;
flist = (struct file_list *)malloc(sizeof(flist[0]));
if (!flist) out_of_memory("send_file_list");
flist->count=0;
flist->malloced = 1000;
flist->files = (struct file_struct **)malloc(sizeof(flist->files[0])*
flist->malloced);
if (!flist->files) out_of_memory("send_file_list");
if (f != -1) {
io_start_buffering(f);
}
for (i=0;i<argc;i++) {
char fname2[MAXPATHLEN];
char *fname = fname2;
strlcpy(fname,argv[i],MAXPATHLEN);
l = strlen(fname);
if (l != 1 && fname[l-1] == '/') {
strlcat(fname,".",MAXPATHLEN);
}
if (link_stat(fname,&st) != 0) {
io_error=1;
rprintf(FERROR,"%s : %s\n",fname,strerror(errno));
continue;
}
if (S_ISDIR(st.st_mode) && !recurse) {
rprintf(FINFO,"skipping directory %s\n",fname);
continue;
}
dir = NULL;
olddir = NULL;
if (!relative_paths) {
p = strrchr(fname,'/');
if (p) {
*p = 0;
if (p == fname)
dir = "/";
else
dir = fname;
fname = p+1;
}
} else if (f != -1 && (p=strrchr(fname,'/'))) {
/* this ensures we send the intermediate directories,
thus getting their permissions right */
*p = 0;
if (strcmp(lastpath,fname)) {
strlcpy(lastpath, fname, sizeof(lastpath));
*p = '/';
for (p=fname+1; (p=strchr(p,'/')); p++) {
int copy_links_saved = copy_links;
*p = 0;
copy_links = 0;
send_file_name(f, flist, fname, 0, 0);
copy_links = copy_links_saved;
*p = '/';
}
} else {
*p = '/';
}
}
if (!*fname)
fname = ".";
if (dir && *dir) {
olddir = push_dir(dir, 1);
if (!olddir) {
io_error=1;
rprintf(FERROR,"push_dir %s : %s\n",
dir,strerror(errno));
continue;
}
flist_dir = dir;
}
if (one_file_system)
set_filesystem(fname);
if (!recurse || !send_included_file_names(f,flist))
send_file_name(f,flist,fname,recurse,FLAG_DELETE);
if (olddir != NULL) {
flist_dir = NULL;
if (pop_dir(olddir) != 0) {
rprintf(FERROR,"pop_dir %s : %s\n",
dir,strerror(errno));
exit_cleanup(RERR_FILESELECT);
}
}
}
if (f != -1) {
send_file_entry(NULL,f,0);
}
if (verbose && recurse && !am_server && f != -1)
rprintf(FINFO,"done\n");
clean_flist(flist, 0);
/* now send the uid/gid list. This was introduced in protocol
version 15 */
if (f != -1 && remote_version >= 15) {
send_uid_list(f);
}
/* if protocol version is >= 17 then send the io_error flag */
if (f != -1 && remote_version >= 17) {
write_int(f, io_error);
}
if (f != -1) {
io_end_buffering(f);
stats.flist_size = stats.total_written - start_write;
stats.num_files = flist->count;
}
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 char flags;
int64 start_read;
extern int list_only;
if (verbose && recurse && !am_server) {
rprintf(FINFO,"receiving file list ... ");
rflush(FINFO);
}
start_read = stats.total_read;
flist = (struct file_list *)malloc(sizeof(flist[0]));
if (!flist)
goto oom;
flist->count=0;
flist->malloced=1000;
flist->files = (struct file_struct **)malloc(sizeof(flist->files[0])*
flist->malloced);
if (!flist->files)
goto oom;
for (flags=read_byte(f); flags; flags=read_byte(f)) {
int i = flist->count;
if (i >= flist->malloced) {
if (flist->malloced < 1000)
flist->malloced += 1000;
else
flist->malloced *= 2;
flist->files =(struct file_struct **)realloc(flist->files,
sizeof(flist->files[0])*
flist->malloced);
if (!flist->files)
goto oom;
}
receive_file_entry(&flist->files[i],flags,f);
if (S_ISREG(flist->files[i]->mode))
stats.total_size += flist->files[i]->length;
flist->count++;
if (verbose > 2)
rprintf(FINFO,"recv_file_name(%s)\n",f_name(flist->files[i]));
}
if (verbose > 2)
rprintf(FINFO,"received %d names\n",flist->count);
clean_flist(flist, relative_paths);
if (verbose && recurse && !am_server) {
rprintf(FINFO,"done\n");
}
/* now recv the uid/gid list. This was introduced in protocol version 15 */
if (f != -1 && remote_version >= 15) {
recv_uid_list(f, flist);
}
/* if protocol version is >= 17 then recv the io_error flag */
if (f != -1 && remote_version >= 17) {
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 **f1,struct file_struct **f2)
{
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 u_strcmp(f_name(*f1),f_name(*f2));
}
int flist_find(struct file_list *flist,struct file_struct *f)
{
int low=0,high=flist->count-1;
if (flist->count <= 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
*/
static void free_file(struct file_struct *file)
{
if (!file) return;
if (file->basename) free(file->basename);
if (file->link) free(file->link);
if (file->sum) free(file->sum);
memset((char *)file, 0, sizeof(*file));
}
/*
* free up all elements in a flist
*/
void flist_free(struct file_list *flist)
{
int i;
for (i=1;i<flist->count;i++) {
free_file(flist->files[i]);
free(flist->files[i]);
}
memset((char *)flist->files, 0, sizeof(flist->files[0])*flist->count);
free(flist->files);
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 i;
if (!flist || flist->count == 0)
return;
qsort(flist->files,flist->count,
sizeof(flist->files[0]),
(int (*)())file_compare);
for (i=1;i<flist->count;i++) {
if (flist->files[i]->basename &&
flist->files[i-1]->basename &&
strcmp(f_name(flist->files[i]),
f_name(flist->files[i-1])) == 0) {
if (verbose > 1 && !am_server)
rprintf(FINFO,"removing duplicate name %s from file list %d\n",
f_name(flist->files[i-1]),i-1);
free_file(flist->files[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,"[%d] i=%d %s %s mode=0%o len=%d\n",
getpid(), i,
NS(flist->files[i]->dirname),
NS(flist->files[i]->basename),
flist->files[i]->mode,
(int)flist->files[i]->length);
}
}
/*
* return the full filename of a flist entry
*/
char *f_name(struct file_struct *f)
{
static char names[10][MAXPATHLEN];
static int n;
char *p = names[n];
if (!f || !f->basename) return NULL;
n = (n+1)%10;
if (f->dirname) {
strlcpy(p, f->dirname, MAXPATHLEN);
strlcat(p, "/", MAXPATHLEN);
strlcat(p, f->basename, MAXPATHLEN);
} else {
strlcpy(p, f->basename, MAXPATHLEN);
}
return p;
}