went back to non-blokcing IO

[rsync/rsync.git] / generator.c

diff --git a/generator.c b/generator.c
index ffde444..f0d23ea 100644 (file)
--- a/generator.c
+++ b/generator.c
@@ -31,6 +31,7 @@ extern int whole_file;
 extern int block_size;
 extern int csum_length;
 extern int ignore_times;
+extern int size_only;
 extern int io_timeout;
 extern int remote_version;
 extern int always_checksum;
@@ -49,7 +50,15 @@ static int skip_file(char *fname,
        if (always_checksum && S_ISREG(st->st_mode)) {
                char sum[MD4_SUM_LENGTH];
                file_checksum(fname,sum,st->st_size);
-               return (memcmp(sum,file->sum,csum_length) == 0);
+               if (remote_version < 21) {
+                       return (memcmp(sum,file->sum,2) == 0);
+               } else {
+                       return (memcmp(sum,file->sum,MD4_SUM_LENGTH) == 0);
+               }
+       }
+
+       if (size_only) {
+               return 1;
        }
 
        if (ignore_times) {
@@ -81,17 +90,19 @@ static int adapt_block_size(struct file_struct *file, int bsize)
 static void send_sums(struct sum_struct *s,int f_out)
 {
        int i;
-
-  /* tell the other guy how many we are going to be doing and how many
-     bytes there are in the last chunk */
+       
+       /* tell the other guy how many we are going to be doing and how many
+          bytes there are in the last chunk */
        write_int(f_out,s?s->count:0);
        write_int(f_out,s?s->n:block_size);
        write_int(f_out,s?s->remainder:0);
-       if (s)
-               for (i=0;i<s->count;i++) {
-                       write_int(f_out,s->sums[i].sum1);
-                       write_buf(f_out,s->sums[i].sum2,csum_length);
-               }
+
+       if (!s) return;
+
+       for (i=0;i<s->count;i++) {
+               write_int(f_out,s->sums[i].sum1);
+               write_buf(f_out,s->sums[i].sum2,csum_length);
+       }
 }
 
 
@@ -125,8 +136,8 @@ static struct sum_struct *generate_sums(struct map_struct *buf,OFF_T len,int n)
        }
 
        if (verbose > 3)
-               rprintf(FINFO,"count=%d rem=%d n=%d flength=%d\n",
-                       s->count,s->remainder,s->n,(int)s->flength);
+               rprintf(FINFO,"count=%d rem=%d n=%d flength=%.0f\n",
+                       s->count,s->remainder,s->n,(double)s->flength);
 
        s->sums = (struct sum_buf *)malloc(sizeof(s->sums[0])*s->count);
        if (!s->sums) out_of_memory("generate_sums");
@@ -143,8 +154,8 @@ static struct sum_struct *generate_sums(struct map_struct *buf,OFF_T len,int n)
                s->sums[i].i = i;
 
                if (verbose > 3)
-                       rprintf(FINFO,"chunk[%d] offset=%d len=%d sum1=%08x\n",
-                               i,(int)s->sums[i].offset,s->sums[i].len,s->sums[i].sum1);
+                       rprintf(FINFO,"chunk[%d] offset=%.0f len=%d sum1=%08x\n",
+                               i,(double)s->sums[i].offset,s->sums[i].len,s->sums[i].sum1);
 
                len -= n1;
                offset += n1;
@@ -162,16 +173,39 @@ void recv_generator(char *fname,struct file_list *flist,int i,int f_out)
        struct sum_struct *s;
        int statret;
        struct file_struct *file = flist->files[i];
+       char *fnamecmp;
+       char fnamecmpbuf[MAXPATHLEN];
+       extern char *compare_dest;
+       extern int list_only;
+       extern int preserve_perms;
+       extern int only_existing;
+
+       if (list_only) return;
 
        if (verbose > 2)
                rprintf(FINFO,"recv_generator(%s,%d)\n",fname,i);
 
        statret = link_stat(fname,&st);
 
+       if (only_existing && statret == -1 && errno == ENOENT) {
+               /* we only want to update existing files */
+               if (verbose > 1) rprintf(FINFO,"not creating %s\n",fname);
+               return;
+       }
+
+       if (statret == 0 && 
+           !preserve_perms && 
+           (S_ISDIR(st.st_mode) == S_ISDIR(file->mode))) {
+               /* if the file exists already and we aren't perserving
+                   presmissions then act as though the remote end sent
+                   us the file permissions we already have */
+               file->mode = (file->mode & _S_IFMT) | (st.st_mode & ~_S_IFMT);
+       }
+
        if (S_ISDIR(file->mode)) {
                if (dry_run) return;
                if (statret == 0 && !S_ISDIR(st.st_mode)) {
-                       if (do_unlink(fname) != 0) {
+                       if (robust_unlink(fname) != 0) {
                                rprintf(FERROR,"unlink %s : %s\n",fname,strerror(errno));
                                return;
                        }
@@ -215,7 +249,7 @@ void recv_generator(char *fname,struct file_list *flist,int i,int f_out)
                }
                delete_file(fname);
                if (do_symlink(file->link,fname) != 0) {
-                       rprintf(FERROR,"link %s -> %s : %s\n",
+                       rprintf(FERROR,"symlink %s -> %s : %s\n",
                                fname,file->link,strerror(errno));
                } else {
                        set_perms(fname,file,NULL,0);
@@ -262,6 +296,21 @@ void recv_generator(char *fname,struct file_list *flist,int i,int f_out)
                return;
        }
 
+       fnamecmp = fname;
+
+       if ((statret == -1) && (compare_dest != NULL)) {
+               /* try the file at compare_dest instead */
+               int saveerrno = errno;
+               slprintf(fnamecmpbuf,MAXPATHLEN,"%s/%s",compare_dest,fname);
+               statret = link_stat(fnamecmpbuf,&st);
+               if (!S_ISREG(st.st_mode))
+                       statret = -1;
+               if (statret == -1)
+                       errno = saveerrno;
+               else
+                       fnamecmp = fnamecmpbuf;
+       }
+
        if (statret == -1) {
                if (errno == ENOENT) {
                        write_int(f_out,i);
@@ -284,14 +333,15 @@ void recv_generator(char *fname,struct file_list *flist,int i,int f_out)
                return;
        }
 
-       if (update_only && st.st_mtime > file->modtime) {
+       if (update_only && st.st_mtime > file->modtime && fnamecmp == fname) {
                if (verbose > 1)
                        rprintf(FINFO,"%s is newer\n",fname);
                return;
        }
 
        if (skip_file(fname, file, &st)) {
-               set_perms(fname,file,&st,1);
+               if (fnamecmp == fname)
+                       set_perms(fname,file,&st,1);
                return;
        }
 
@@ -307,11 +357,13 @@ void recv_generator(char *fname,struct file_list *flist,int i,int f_out)
        }
 
        /* open the file */  
-       fd = open(fname,O_RDONLY);
+       fd = do_open(fnamecmp, O_RDONLY, 0);
 
        if (fd == -1) {
-               rprintf(FERROR,"failed to open %s : %s\n",fname,strerror(errno));
-               rprintf(FERROR,"skipping %s\n",fname);
+               rprintf(FERROR,"failed to open %s, continuing : %s\n",fnamecmp,strerror(errno));
+               /* pretend the file didn't exist */
+               write_int(f_out,i);
+               send_sums(NULL,f_out);
                return;
        }
 
@@ -322,7 +374,7 @@ void recv_generator(char *fname,struct file_list *flist,int i,int f_out)
        }
 
        if (verbose > 3)
-               rprintf(FINFO,"gen mapped %s of size %d\n",fname,(int)st.st_size);
+               rprintf(FINFO,"gen mapped %s of size %.0f\n",fnamecmp,(double)st.st_size);
 
        s = generate_sums(buf,st.st_size,adapt_block_size(file, block_size));