X-Git-Url: https://mattmccutchen.net/rsync/rsync.git/blobdiff_plain/375a4556c7a1ffb9a4e7117f33fc42ed2bc4c026..740819ef7b3b96451e16b2fa3891d46cfc73ec64:/generator.c

diff --git a/generator.c b/generator.c
index 99052220..6b242683 100644
--- a/generator.c
+++ b/generator.c
@@ -1,5 +1,6 @@
-/* 
-   Copyright (C) Andrew Tridgell 1996
+/* -*- c-file-style: "linux" -*-
+   
+   Copyright (C) 1996-2000 by Andrew Tridgell 
    Copyright (C) Paul Mackerras 1996
    
    This program is free software; you can redistribute it and/or modify
@@ -31,9 +32,12 @@ 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;
+extern int modify_window;
+extern char *compare_dest;
 
 
 /* choose whether to skip a particular file */
@@ -48,15 +52,32 @@ static int skip_file(char *fname,
 	   of the file time to determine whether to sync */
 	if (always_checksum && S_ISREG(st->st_mode)) {
 		char sum[MD4_SUM_LENGTH];
+		char fnamecmpdest[MAXPATHLEN];
+
+		if (compare_dest != NULL) {
+			if (access(fname, 0) != 0) {
+				snprintf(fnamecmpdest,MAXPATHLEN,"%s/%s",
+						    compare_dest,fname);
+				fname = fnamecmpdest;
+			}
+		}
 		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) {
 		return 0;
 	}
 
-	return (st->st_mtime == file->modtime);
+	return (cmp_modtime(st->st_mtime,file->modtime) == 0);
 }
 
 
@@ -81,17 +102,19 @@ 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 +148,8 @@ 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 +166,8 @@ 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;
@@ -154,6 +177,15 @@ static struct sum_struct *generate_sums(struct map_struct *buf,OFF_T len,int n)
 }
 
 
+
+/*
+ * Acts on file number I from FLIST, whose name is fname.
+ *
+ * First fixes up permissions, then generates checksums for the file.
+ *
+ * (This comment was added later by mbp who was trying to work it out;
+ * it might be wrong.)
+ */ 
 void recv_generator(char *fname,struct file_list *flist,int i,int f_out)
 {  
 	int fd;
@@ -165,17 +197,44 @@ void recv_generator(char *fname,struct file_list *flist,int i,int f_out)
 	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)) {
+                /* The file to be received is a directory, so we need
+                 * to prepare appropriately.  If there is already a
+                 * file of that name and it is *not* a directory, then
+                 * we need to delete it.  If it doesn't exist, then
+                 * recursively create it. */
+          
 		if (dry_run) return;
 		if (statret == 0 && !S_ISDIR(st.st_mode)) {
-			if (do_unlink(fname) != 0) {
-				rprintf(FERROR,"unlink %s : %s\n",fname,strerror(errno));
+			if (robust_unlink(fname) != 0) {
+				rprintf(FERROR,"recv_generator: unlink %s: %s\n",
+                                        fname,strerror(errno));
 				return;
 			}
 			statret = -1;
@@ -184,7 +243,7 @@ void recv_generator(char *fname,struct file_list *flist,int i,int f_out)
 			if (!(relative_paths && errno==ENOENT && 
 			      create_directory_path(fname)==0 && 
 			      do_mkdir(fname,file->mode)==0)) {
-				rprintf(FERROR,"mkdir %s : %s (2)\n",
+				rprintf(FERROR,"recv_generator: mkdir %s: %s (2)\n",
 					fname,strerror(errno));
 			}
 		}
@@ -215,10 +274,10 @@ void recv_generator(char *fname,struct file_list *flist,int i,int f_out)
 					return;
 				}
 			}
+			delete_file(fname);
 		}
-		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);
@@ -270,7 +329,7 @@ void recv_generator(char *fname,struct file_list *flist,int i,int f_out)
 	if ((statret == -1) && (compare_dest != NULL)) {
 		/* try the file at compare_dest instead */
 		int saveerrno = errno;
-		slprintf(fnamecmpbuf,MAXPATHLEN-1,"%s/%s",compare_dest,fname);
+		snprintf(fnamecmpbuf,MAXPATHLEN,"%s/%s",compare_dest,fname);
 		statret = link_stat(fnamecmpbuf,&st);
 		if (!S_ISREG(st.st_mode))
 			statret = -1;
@@ -302,14 +361,15 @@ void recv_generator(char *fname,struct file_list *flist,int i,int f_out)
 		return;
 	}
 
-	if (update_only && st.st_mtime > file->modtime && fnamecmp == fname) {
+	if (update_only && cmp_modtime(st.st_mtime,file->modtime)>0 && 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;
 	}
 
@@ -325,11 +385,13 @@ void recv_generator(char *fname,struct file_list *flist,int i,int f_out)
 	}
 
 	/* open the file */  
-	fd = open(fnamecmp,O_RDONLY);
+	fd = do_open(fnamecmp, O_RDONLY, 0);
 
 	if (fd == -1) {
-		rprintf(FERROR,"failed to open %s : %s\n",fnamecmp,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;
 	}
 
@@ -340,7 +402,7 @@ 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",fnamecmp,(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));
 
@@ -367,6 +429,11 @@ void generate_files(int f,struct file_list *flist,char *local_name,int f_recv)
 		rprintf(FINFO,"generator starting pid=%d count=%d\n",
 			(int)getpid(),flist->count);
 
+	/* we expect to just sit around now, so don't exit on a
+	   timeout. If we really get a timeout then the other process should
+	   exit */
+	io_timeout = 0;
+
 	for (i = 0; i < flist->count; i++) {
 		struct file_struct *file = flist->files[i];
 		mode_t saved_mode = file->mode;
@@ -377,6 +444,8 @@ void generate_files(int f,struct file_list *flist,char *local_name,int f_recv)
 		   them. This is then fixed after the files are transferred */
 		if (!am_root && S_ISDIR(file->mode)) {
 			file->mode |= S_IWUSR; /* user write */
+                        /* XXX: Could this be causing a problem on SCO?  Perhaps their
+                         * handling of permissions is strange? */
 		}
 
 		recv_generator(local_name?local_name:f_name(file),
@@ -394,11 +463,6 @@ void generate_files(int f,struct file_list *flist,char *local_name,int f_recv)
 
 	write_int(f,-1);
 
-	/* we expect to just sit around now, so don't exit on a
-	   timeout. If we really get a timeout then the other process should
-	   exit */
-	io_timeout = 0;
-
 	if (remote_version >= 13) {
 		/* in newer versions of the protocol the files can cycle through
 		   the system more than once to catch initial checksum errors */