X-Git-Url: https://jxself.org/git/?a=blobdiff_plain;f=tfcrypt.c;h=fb3dfb9cb44a7e0826dc059c13c555ef7ecbc761;hb=c0dc5614a87ed6d0eed4906447171ef4c73b306e;hp=d673d386e7757cf739ffc35fbf35283476b39e3b;hpb=0303cbcec2b262cc3dcf8d89951967d7ba9543c7;p=tfcrypt.git

diff --git a/tfcrypt.c b/tfcrypt.c
index d673d38..fb3dfb9 100644
--- a/tfcrypt.c
+++ b/tfcrypt.c
@@ -425,14 +425,21 @@ _baddfname:
 					}
 					else if (!strncmp(s, "ftrunc", 6) && *(s+6) == '=') {
 						s += 7;
-						ftrunc_dfd = tfc_humanfsize(s, &stoi);
-						if (!str_empty(stoi)) {
-							ftrunc_dfd = tfc_fnamesize(s, YES);
-							ftrunc_dfd = tfc_modifysize(ftrunc_dfd, strchr(s, ':'));
-							if (ftrunc_dfd == NOFSIZE) xerror(NO, YES, YES,
-							"%s: invalid ftrunc value", s);
+						if (!strcmp(s, "tail")) {
+							do_ftrunc = TFC_FTRUNC_TAIL;
+							ftrunc_dfd = NOFSIZE;
+						}
+						else {
+							do_ftrunc = TFC_DO_FTRUNC;
+							ftrunc_dfd = tfc_humanfsize(s, &stoi);
+							if (!str_empty(stoi)) {
+								ftrunc_dfd = tfc_fnamesize(s, YES);
+								ftrunc_dfd = tfc_modifysize(ftrunc_dfd, strchr(s, ':'));
+								if (ftrunc_dfd == NOFSIZE) xerror(NO, YES, YES,
+								"%s: invalid ftrunc value", s);
+							}
+							else ftrunc_dfd = tfc_modifysize(ftrunc_dfd, strchr(s, ':'));
 						}
-						else ftrunc_dfd = tfc_modifysize(ftrunc_dfd, strchr(s, ':'));
 					}
 					else if (!strncmp(s, "xkey", 4) && *(s+4) == '=') {
 						s += 5;
@@ -1333,7 +1340,10 @@ _nomac:
 
 	if (do_preserve_time) fcopy_matime(dfd, &s_stat);
 	xclose(sfd);
-	if (ftrunc_dfd != NOFSIZE) if (ftruncate(dfd, (off_t)ftrunc_dfd) == -1) xerror(YES, NO, YES, "ftruncate(%d)", dfd);
+	if (do_ftrunc > TFC_NO_FTRUNC) {
+		if (do_ftrunc == TFC_FTRUNC_TAIL) ftrunc_dfd = total_processed_dst;
+		if (ftruncate(dfd, (off_t)ftrunc_dfd) == -1) xerror(YES, NO, YES, "ftruncate(%d)", dfd);
+	}
 	xclose(dfd);
 
 	xexit(exitcode);