$OpenBSD: patch-ctm_ctm_ctm_passb_c,v 1.2 2007/10/31 23:14:46 ajacoutot Exp $
--- ctm/ctm/ctm_passb.c.orig	Wed Oct 31 23:09:23 2007
+++ ctm/ctm/ctm_passb.c	Wed Oct 31 23:10:13 2007
@@ -0,0 +1,141 @@
+/*
+ * ----------------------------------------------------------------------------
+ * "THE BEER-WARE LICENSE" (Revision 42):
+ * <koshy@india.hp.com> wrote this file.  As long as you retain this notice you
+ * can do whatever you want with this stuff. If we meet some day, and you think
+ * this stuff is worth it, you can buy me a beer in return.   Joseph Koshy
+ * ----------------------------------------------------------------------------
+ *
+ *
+ */
+
+#include "ctm.h"
+#define BADREAD 32
+
+/*---------------------------------------------------------------------------*/
+/* PassB -- Backup modified files.
+ */
+
+int
+PassB(FILE *fd)
+{
+    u_char *p,*q;
+    MD5_CTX ctx;
+    int i,j,sep,cnt;
+    u_char *md5=0,*md5before=0,*trash=0,*name=0,*uid=0,*gid=0,*mode=0;
+    struct CTM_Syntax *sp;
+    FILE *b = 0;	/* backup command */
+    u_char buf[BUFSIZ];
+    char md5_1[33];
+    int ret = 0;
+    int match = 0;
+    struct CTM_Filter *filter = NULL;
+
+    if(Verbose>3)
+	printf("PassB -- Backing up files which would be changed.\n");
+
+    MD5Init (&ctx);
+    sprintf(buf, TarCmd, BackupFile);
+    b=popen(buf, "w");
+    if(!b) { warn("%s", buf); return Exit_Garbage; }
+
+    GETFIELD(p,' '); if(strcmp("CTM_BEGIN",p)) WRONG
+    GETFIELD(p,' '); if(strcmp(Version,p)) WRONG
+    GETFIELD(p,' '); if(strcmp(Name,p)) WRONG
+    GETFIELD(p,' '); if(strcmp(Nbr,p)) WRONG
+    GETFIELD(p,' '); if(strcmp(TimeStamp,p)) WRONG
+    GETFIELD(p,'\n'); if(strcmp(Prefix,p)) WRONG
+
+    for(;;) {
+	Delete(md5);
+	Delete(uid);
+	Delete(gid);
+	Delete(mode);
+	Delete(md5before);
+	Delete(trash);
+	Delete(name);
+	cnt = -1;
+
+	GETFIELD(p,' ');
+
+	if (p[0] != 'C' || p[1] != 'T' || p[2] != 'M') WRONG
+
+	if(!strcmp(p+3,"_END"))
+	    break;
+
+	for(sp=Syntax;sp->Key;sp++)
+	    if(!strcmp(p+3,sp->Key))
+		goto found;
+	WRONG
+    found:
+	for(i=0;(j = sp->List[i]);i++) {
+	    if (sp->List[i+1] && (sp->List[i+1] & CTM_F_MASK) != CTM_F_Bytes)
+		sep = ' ';
+	    else
+		sep = '\n';
+
+	    switch (j & CTM_F_MASK) {
+		case CTM_F_Name: GETNAMECOPY(name,sep,j, Verbose); break;
+		case CTM_F_Uid:  GETFIELDCOPY(uid,sep); break;
+		case CTM_F_Gid:  GETFIELDCOPY(gid,sep); break;
+		case CTM_F_Mode: GETFIELDCOPY(mode,sep); break;
+		case CTM_F_MD5:
+		    if(j & CTM_Q_MD5_Before)
+			GETFIELDCOPY(md5before,sep);
+		    else
+			GETFIELDCOPY(md5,sep);
+		    break;
+		case CTM_F_Count: GETBYTECNT(cnt,sep); break;
+		case CTM_F_Bytes: GETDATA(trash,cnt); break;
+		default: WRONG
+		}
+	    }
+	/* XXX This should go away.  Disallow trailing '/' */
+	j = strlen(name)-1;
+	if(name[j] == '/') name[j] = '\0';
+
+	if (KeepIt && 
+	    (!strcmp(sp->Key,"DR") || !strcmp(sp->Key,"FR")))
+	    continue;
+		
+	/* match the name against the elements of the filter list.  The
+	   action associated with the last matched filter determines whether
+	   this file should be ignored or backed up. */
+	match = (FilterList ? !(FilterList->Action) : CTM_FILTER_ENABLE);
+	for (filter = FilterList; filter; filter = filter->Next) {
+	    if (0 == regexec(&filter->CompiledRegex, name, 0, 0, 0))
+		match = filter->Action;
+	}
+
+	if (CTM_FILTER_DISABLE == match)
+		continue;
+
+	if (!strcmp(sp->Key,"FS") || !strcmp(sp->Key,"FN") ||
+	    !strcmp(sp->Key,"AS") || !strcmp(sp->Key,"DR") || 
+	    !strcmp(sp->Key,"FR")) {
+	    /* send name to the archiver for a backup */
+	    cnt = strlen(name);
+	    if (cnt != fwrite(name,1,cnt,b) || EOF == fputc('\n',b)) {
+		warn("%s", name);
+		pclose(b);
+		WRONG;
+	    }
+	}
+    }
+
+    ret = pclose(b);
+
+    Delete(md5);
+    Delete(uid);
+    Delete(gid);
+    Delete(mode);
+    Delete(md5before);
+    Delete(trash);
+    Delete(name);
+
+    q = MD5End (&ctx,md5_1);
+    GETFIELD(p,'\n');			/* <MD5> */
+    if(strcmp(q,p)) WRONG
+    if (-1 != getc(fd)) WRONG
+    return ret;
+}