X-Git-Url: https://jxself.org/git/?a=blobdiff_plain;f=tfcrypt.c;h=604a6bf990247abd61c19f996a83dea63d989002;hb=1a8928c3ab5bd19851a3d2d03451b2f8a25c62e9;hp=4ba1dd530cd179dd269abfa4cca8033c347f853b;hpb=7843812e68ebd194667b244cdd6f6cbd45beb3a5;p=tfcrypt.git

diff --git a/tfcrypt.c b/tfcrypt.c
index 4ba1dd5..604a6bf 100644
--- a/tfcrypt.c
+++ b/tfcrypt.c
@@ -2,7 +2,7 @@
  * tfcrypt -- high security Threefish encryption tool.
  *
  * tfcrypt is copyrighted:
- * Copyright (C) 2012-2018 Andrey Rys. All rights reserved.
+ * Copyright (C) 2012-2019 Andrey Rys. All rights reserved.
  *
  * tfcrypt is licensed to you under the terms of std. MIT/X11 license:
  *
@@ -128,6 +128,12 @@ int main(int argc, char **argv)
 _baddfname:
 	memset(s, 0, n);
 
+	if (!strcmp(progname, "iotool")) {
+		do_edcrypt = TFC_DO_PLAIN;
+		password = YES;
+		ctr_mode = TFC_MODE_PLAIN;
+	}
+
 	opterr = 0;
 	while ((c = getopt(argc, argv, "L:s:aU:C:r:K:t:Pkzxc:l:qedn:vV:pwE:O:S:AmM:R:Z:WHD:")) != -1) {
 		switch (c) {
@@ -195,10 +201,10 @@ _baddfname:
 				ctr_mode = TFC_MODE_PLAIN;
 				break;
 			case 'e':
-				do_edcrypt = TFC_DO_ENCRYPT;
+				if (do_edcrypt != TFC_DO_PLAIN) do_edcrypt = TFC_DO_ENCRYPT;
 				break;
 			case 'd':
-				do_edcrypt = TFC_DO_DECRYPT;
+				if (do_edcrypt != TFC_DO_PLAIN) do_edcrypt = TFC_DO_DECRYPT;
 				break;
 			case 'D':
 				macbits = strtoul(optarg, &stoi, 10);
@@ -425,14 +431,21 @@ _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 +1346,10 @@ _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);